src/mcp.rs

// SPF Smart Gateway - MCP Server (JSON-RPC 2.0 over stdio)
// Copyright 2026 Joseph Stone - All Rights Reserved
//
// ALL tool calls route through this gateway.
// Exposes: spf_read, spf_write, spf_edit, spf_bash, spf_status,
//          spf_calculate, spf_session, spf_brain_search, spf_brain_store

use crate::calculate::{self, ToolParams};
use crate::voice::spf_voice;
use crate::config::SpfConfig;
use crate::config_db::SpfConfigDb;
use crate::paths::{spf_root};
use crate::tmp_db::SpfTmpDb;
use crate::agent_state::AgentStateDb;
use crate::fs::SpfFs;
use crate::gate;
use crate::session::Session;
use crate::storage::SpfStorage;
use crate::web::WebClient;
use crate::utf8_safe;
use serde_json::{json, Value};
use std::io::{self, BufRead, Write};
use std::sync::{Arc, Mutex};
use crate::http::ServerState;
use std::process::Command;
use chrono::{DateTime, Local, Utc};
use std::fs::OpenOptions;

// Voice session state: crate::voice::VOICE_SESSION (Block LL — moved to voice.rs for mesh access)

/// Chat engine state — persists across tool calls.
/// Stores conversations, message history, and routes incoming chat.
static CHAT_ENGINE: std::sync::Mutex<Option<crate::chat::ChatEngine>> = std::sync::Mutex::new(None);


const PROTOCOL_VERSION: &str = "2024-11-05";

/// Format Unix timestamp as human-readable ISO8601
fn format_timestamp(ts: u64) -> String {
    if ts == 0 {
        return "Never".to_string();
    }
    DateTime::<Utc>::from_timestamp(ts as i64, 0)
        .map(|dt| dt.format("%Y-%m-%d %H:%M:%S UTC").to_string())
        .unwrap_or_else(|| ts.to_string())
}
const SERVER_NAME: &str = "spf-smart-gate";
const SERVER_VERSION: &str = "3.0.0";

// brain_path() and run_brain() removed — replaced by crate::brain_local (in-process)
// RG-1: run_rag(), rag_collector_path(), rag_collector_dir() removed — Python subprocess eliminated.
// RAG handlers now redirect to brain_local (in-process) or return deprecation messages.

/// Log to stderr (stdout is JSON-RPC)
fn log(msg: &str) {
    eprintln!("[spf-smart-gate] {}", msg);
}

/// Persistent command log → LIVE/SESSION/cmd.log
fn cmd_log(msg: &str) {
    let log_path = spf_root().join("LIVE/SESSION/cmd.log");
    if let Ok(mut f) = OpenOptions::new().create(true).append(true).open(&log_path) {
        let ts = Local::now().format("%Y-%m-%d %H:%M:%S");
        let _ = writeln!(f, "[{}] {}", ts, msg);
    }
}

/// Summarize tool params for logging (truncate large values)
fn param_summary(name: &str, args: &Value) -> String {
    match name {
        n if n.contains("bash") => {
            let cmd = args.get("command").and_then(|v| v.as_str()).unwrap_or("?");
            if cmd.len() > 200 { format!("cmd={}…", utf8_safe::safe_truncate(cmd, 200)) } else { format!("cmd={}", cmd) }
        }
        n if n.contains("read") || n.contains("edit") || n.contains("glob") => {
            let path = args.get("file_path")
                .or_else(|| args.get("path"))
                .or_else(|| args.get("absolute_path"))
                .and_then(|v| v.as_str())
                .unwrap_or("?");
            let pattern = args.get("pattern").and_then(|v| v.as_str());
            match pattern {
                Some(pat) => format!("path={} pattern={}", path, pat),
                None => format!("path={}", path),
            }
        }
        n if n.contains("write") => {
            let path = args.get("file_path")
                .or_else(|| args.get("path"))
                .and_then(|v| v.as_str())
                .unwrap_or("?");
            let size = args.get("content").and_then(|v| v.as_str()).map(|s| s.len()).unwrap_or(0);
            format!("path={} content_len={}", path, size)
        }
        n if n.contains("grep") => {
            let pattern = args.get("pattern").and_then(|v| v.as_str()).unwrap_or("?");
            let path = args.get("path").and_then(|v| v.as_str()).unwrap_or(".");
            format!("pattern={} path={}", pattern, path)
        }
        n if n.contains("web") => {
            let url = args.get("url").and_then(|v| v.as_str()).unwrap_or("?");
            let query = args.get("query").and_then(|v| v.as_str());
            match query {
                Some(q) => format!("query={}", q),
                None => format!("url={}", url),
            }
        }
        n if n.contains("brain") || n.contains("rag") => {
            let query = args.get("query")
                .or_else(|| args.get("text"))
                .or_else(|| args.get("path"))
                .and_then(|v| v.as_str())
                .unwrap_or("?");
            let truncated = utf8_safe::safe_truncate(query, 150);
            format!("q={}", truncated)
        }
        _ => {
            let s = args.to_string();
            if s.len() > 300 { format!("{}…", utf8_safe::safe_truncate(&s, 300)) } else { s }
        }
    }
}

/// Send JSON-RPC response
fn send_response(id: &Value, result: Value) {
    let response = json!({
        "jsonrpc": "2.0",
        "id": id,
        "result": result,
    });
    let msg = serde_json::to_string(&response).unwrap();
    let stdout = io::stdout();
    let mut out = stdout.lock();
    let _ = out.write_all(msg.as_bytes());
    let _ = out.write_all(b"\n");
    let _ = out.flush();
}

/// Send JSON-RPC error response
fn send_error(id: &Value, code: i64, message: &str) {
    let response = json!({
        "jsonrpc": "2.0",
        "id": id,
        "error": { "code": code, "message": message },
    });
    let msg = serde_json::to_string(&response).unwrap();
    let stdout = io::stdout();
    let mut out = stdout.lock();
    let _ = out.write_all(msg.as_bytes());
    let _ = out.write_all(b"\n");
    let _ = out.flush();
}

/// MCP tool definition helper
fn tool_def(name: &str, description: &str, properties: Value, required: Vec<&str>) -> Value {
    json!({
        "name": name,
        "description": description,
        "inputSchema": {
            "type": "object",
            "properties": properties,
            "required": required,
        }
    })
}

/// Return all tool definitions
pub fn tool_definitions() -> Vec<Value> {
    let mut tools = vec![
        // ====== CORE GATE TOOLS ======
        // spf_gate REMOVED — was a bypass vector. Gate is internal only.
        tool_def(
            "spf_calculate",
            "Calculate complexity score for a tool call without executing. Returns C value, tier, and allocation.",
            json!({
                "tool": {"type": "string", "description": "Tool name"},
                "params": {"type": "object", "description": "Tool parameters"}
            }),
            vec!["tool", "params"],
        ),
        tool_def(
            "spf_status",
            "Get current SPF gateway status: session metrics, enforcement mode, complexity budget.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_session",
            "Get full session state: files read/written, action history, anchor ratio, complexity history.",
            json!({
                "mode": {"type": "string", "description": "Output mode: 'full' (default) or 'summary' (counts only, ~200 tokens)", "default": "full"},
                "limit": {"type": "integer", "description": "Max manifest/complexity entries to return (default: all)", "default": 0}
            }),
            vec![],
        ),

        // ====== GATED FILE OPERATIONS ======
        tool_def(
            "Read",
            "Read a file through SPF gateway. Tracks read for Build Anchor Protocol. SPFsmartGATE",
            json!({
                "file_path": {"type": "string", "description": "Absolute path to file"},
                "limit": {"type": "integer", "description": "Max lines to read (optional)"},
                "offset": {"type": "integer", "description": "Line offset to start from (optional)"}
            }),
            vec!["file_path"],
        ),
        tool_def(
            "Write",
            "Write a file through SPF gateway. Validates: Build Anchor, blocked paths, file size. SPFsmartGATE",
            json!({
                "file_path": {"type": "string", "description": "Absolute path to file"},
                "content": {"type": "string", "description": "File content to write"}
            }),
            vec!["file_path", "content"],
        ),
        tool_def(
            "Edit",
            "Edit a file through SPF gateway. Validates: Build Anchor, blocked paths, change size. SPFsmartGATE",
            json!({
                "file_path": {"type": "string", "description": "Absolute path to file"},
                "old_string": {"type": "string", "description": "Text to replace"},
                "new_string": {"type": "string", "description": "Replacement text"},
                "replace_all": {"type": "boolean", "description": "Replace all occurrences", "default": false}
            }),
            vec!["file_path", "old_string", "new_string"],
        ),
        tool_def(
            "Bash",
            "Execute a bash command through SPF gateway. Validates: dangerous commands, /tmp access, git force. SPFsmartGATE",
            json!({
                "command": {"type": "string", "description": "Bash command to execute"},
                "timeout": {"type": "integer", "description": "Timeout in seconds (default: 30)", "default": 30}
            }),
            vec!["command"],
        ),

        // ====== SEARCH/GLOB TOOLS ======
        tool_def(
            "Glob",
            "Fast file pattern matching. Supports glob patterns like **/*.rs or src/**/*.ts. SPFsmartGATE",
            json!({
                "pattern": {"type": "string", "description": "Glob pattern to match files"},
                "path": {"type": "string", "description": "Directory to search in (default: current dir)"}
            }),
            vec!["pattern"],
        ),
        tool_def(
            "Grep",
            "Search file contents using regex. Built on ripgrep. SPFsmartGATE",
            json!({
                "pattern": {"type": "string", "description": "Regex pattern to search for"},
                "path": {"type": "string", "description": "File or directory to search"},
                "glob": {"type": "string", "description": "Glob filter (e.g. *.rs)"},
                "case_insensitive": {"type": "boolean", "description": "Case insensitive search", "default": true},
                "context_lines": {"type": "integer", "description": "Lines of context around matches", "default": 0}
            }),
            vec!["pattern"],
        ),

        // ====== WEB BROWSER TOOLS ======
        tool_def(
            "spf_web_search",
            "Search the web for information. Uses Brave API if BRAVE_API_KEY set, otherwise DuckDuckGo.",
            json!({
                "query": {"type": "string", "description": "Search query"},
                "count": {"type": "integer", "description": "Max results (default: 10)", "default": 10}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_web_fetch",
            "Fetch a URL and return clean readable text. HTML is converted to plain text, JSON is pretty-printed.",
            json!({
                "url": {"type": "string", "description": "URL to fetch"},
                "prompt": {"type": "string", "description": "Prompt to run on fetched content"}
            }),
            vec!["url", "prompt"],
        ),
        tool_def(
            "spf_web_download",
            "Download a file from URL and save to disk.",
            json!({
                "url": {"type": "string", "description": "URL to download"},
                "save_path": {"type": "string", "description": "Local path to save file"}
            }),
            vec!["url", "save_path"],
        ),
        tool_def(
            "spf_web_api",
            "Make an API request. Returns status, headers, and response body.",
            json!({
                "method": {"type": "string", "description": "HTTP method (GET, POST, PUT, DELETE, PATCH)"},
                "url": {"type": "string", "description": "API endpoint URL"},
                "headers": {"type": "string", "description": "JSON object of headers (optional)", "default": ""},
                "body": {"type": "string", "description": "Request body JSON (optional)", "default": ""}
            }),
            vec!["method", "url"],
        ),

        // ====== WEB BROWSER TOOLS — Reverse Proxy Engine (WB-2e) ======
        tool_def(
            "spf_web_connect",
            "Initialise the reverse proxy browser engine. Call once before any other spf_web_* tools. Opens a proxy on the SPF HTTP port — browser navigates through SPF.",
            json!({"port": {"type": "integer", "description": "Proxy port (default: SPF HTTP port)", "default": 0}}),
            vec![],
        ),
        tool_def(
            "spf_web_navigate",
            "Navigate the browser to a URL. SPF fetches the page, injects control JS, serves it locally. Browser connects back via WebSocket.",
            json!({"url": {"type": "string", "description": "URL to navigate to (SSRF-validated)"}}),
            vec!["url"],
        ),
        tool_def(
            "spf_web_click",
            "Click a page element by CSS selector. Routes through injected control JS.",
            json!({"selector": {"type": "string", "description": "CSS selector (e.g. '#submit', '.btn', 'a[href=\"/login\"]')"}}),
            vec!["selector"],
        ),
        tool_def(
            "spf_web_fill",
            "Type text into a form field by CSS selector.",
            json!({
                "selector": {"type": "string", "description": "CSS selector for the input field"},
                "text": {"type": "string", "description": "Text to type into the field"}
            }),
            vec!["selector", "text"],
        ),
        tool_def(
            "spf_web_select",
            "Query page elements by CSS selector. Returns matching elements with tag, id, class, and text.",
            json!({"selector": {"type": "string", "description": "CSS selector"}}),
            vec!["selector"],
        ),
        tool_def(
            "spf_web_eval",
            "Execute JavaScript on the current page and return the result.",
            json!({"expression": {"type": "string", "description": "JavaScript expression to evaluate in the page context"}}),
            vec!["expression"],
        ),
        tool_def(
            "spf_web_screenshot",
            "Capture a screenshot of the current page. Returns file path — use Read tool to view.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_web_design",
            "Extract design brief from current page: colours, fonts, spacing, components, images, forms — all computed values via injected JS.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_web_page",
            "Get structured overview of current page: title, URL, headings, links, forms, images, buttons.",
            json!({}),
            vec![],
        ),

        // ====== NOTEBOOK TOOL ======
        tool_def(
            "spf_notebook_edit",
            "Edit a Jupyter notebook cell.",
            json!({
                "notebook_path": {"type": "string", "description": "Absolute path to .ipynb file"},
                "cell_number": {"type": "integer", "description": "Cell index (0-based)"},
                "new_source": {"type": "string", "description": "New cell content"},
                "cell_type": {"type": "string", "description": "Cell type: code or markdown"},
                "edit_mode": {"type": "string", "description": "Mode: replace, insert, or delete", "default": "replace"}
            }),
            vec!["notebook_path", "new_source"],
        ),

        // ====== BRAIN PASSTHROUGH ======
        tool_def(
            "spf_brain_search",
            "Search brain through SPF gateway. All brain access is logged and tracked.",
            json!({
                "query": {"type": "string", "description": "Search query"},
                "collection": {"type": "string", "description": "Collection (default: default)", "default": "default"},
                "limit": {"type": "integer", "description": "Max results (default: 5)", "default": 5}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_brain_store",
            "Store document in brain through SPF gateway.",
            json!({
                "text": {"type": "string", "description": "Text to store"},
                "title": {"type": "string", "description": "Document title", "default": "untitled"},
                "collection": {"type": "string", "description": "Collection", "default": "default"},
                "tags": {"type": "string", "description": "Comma-separated tags", "default": ""}
            }),
            vec!["text"],
        ),
        tool_def(
            "spf_flint_store",
            "Agent memory store through FLINT pipeline. Bypasses brain write gate. Stores in brain vectors + FLINT Working tier for memory lifecycle.",
            json!({
                "text": {"type": "string", "description": "Text to store"},
                "title": {"type": "string", "description": "Document title", "default": "untitled"},
                "collection": {"type": "string", "description": "Collection (default: default)", "default": "default"},
                "tags": {"type": "string", "description": "Comma-separated tags", "default": ""}
            }),
            vec!["text"],
        ),

        // ====== ADDITIONAL BRAIN TOOLS ======
        tool_def(
            "spf_brain_context",
            "Get relevant context for a query. Returns formatted context for prompt injection.",
            json!({
                "query": {"type": "string", "description": "Query to get context for"},
                "max_tokens": {"type": "integer", "description": "Max tokens (default: 2000)", "default": 2000}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_brain_index",
            "Index a file or directory into the brain.",
            json!({
                "path": {"type": "string", "description": "File or directory to index"}
            }),
            vec!["path"],
        ),
        tool_def(
            "spf_brain_list",
            "List all indexed collections and document counts.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_brain_status",
            "Get brain system status.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_brain_recall",
            "Search and return full parent documents. Searches vectors then resolves to complete stored document.",
            json!({
                "query": {"type": "string", "description": "Natural language search query"},
                "collection": {"type": "string", "description": "Collection to search (default: default)", "default": "default"}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_brain_list_docs",
            "List all stored documents in a collection.",
            json!({
                "collection": {"type": "string", "description": "Collection name (default: default)", "default": "default"}
            }),
            vec![],
        ),
        tool_def(
            "spf_brain_get_doc",
            "Retrieve a specific document by its ID.",
            json!({
                "doc_id": {"type": "string", "description": "Document ID to retrieve"},
                "collection": {"type": "string", "description": "Collection name (default: default)", "default": "default"}
            }),
            vec!["doc_id"],
        ),

        // ====== RAG COLLECTOR TOOLS ======
        tool_def(
            "spf_rag_collect_web",
            "Search web and collect documents. Optional topic filter.",
            json!({
                "topic": {"type": "string", "description": "Topic to search (optional)"},
                "auto_index": {"type": "boolean", "description": "Auto-index collected docs", "default": true}
            }),
            vec![],
        ),
        tool_def(
            "spf_rag_collect_file",
            "Process a local file.",
            json!({
                "path": {"type": "string", "description": "File path"},
                "category": {"type": "string", "description": "Category (default: auto)", "default": "auto"}
            }),
            vec!["path"],
        ),
        tool_def(
            "spf_rag_collect_folder",
            "Process all files in a folder.",
            json!({
                "path": {"type": "string", "description": "Folder path"},
                "extensions": {"type": "array", "items": {"type": "string"}, "description": "File extensions to include"}
            }),
            vec!["path"],
        ),
        tool_def(
            "spf_rag_collect_drop",
            "Process files in DROP_HERE folder.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_rag_index_gathered",
            "Index all documents in GATHERED to brain.",
            json!({
                "category": {"type": "string", "description": "Category to index (optional)"}
            }),
            vec![],
        ),
        tool_def(
            "spf_rag_dedupe",
            "Deduplicate brain collection.",
            json!({
                "category": {"type": "string", "description": "Category to dedupe"}
            }),
            vec!["category"],
        ),
        tool_def(
            "spf_rag_status",
            "Get collector status and stats.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_rag_list_gathered",
            "List documents in GATHERED folder.",
            json!({
                "category": {"type": "string", "description": "Filter by category"}
            }),
            vec![],
        ),
        tool_def(
            "spf_rag_bandwidth_status",
            "Get bandwidth usage stats and limits.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_rag_fetch_url",
            "Fetch a single URL with bandwidth limiting.",
            json!({
                "url": {"type": "string", "description": "URL to fetch"},
                "auto_index": {"type": "boolean", "description": "Auto-index after fetch", "default": true}
            }),
            vec!["url"],
        ),
        tool_def(
            "spf_rag_collect_rss",
            "Collect from RSS/Atom feeds.",
            json!({
                "feed_name": {"type": "string", "description": "Specific feed name (optional)"},
                "auto_index": {"type": "boolean", "description": "Auto-index collected", "default": true}
            }),
            vec![],
        ),
        tool_def(
            "spf_rag_list_feeds",
            "List configured RSS feeds.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_rag_pending_searches",
            "Get pending SearchSeeker vectors from brain (gaps needing fetch).",
            json!({
                "collection": {"type": "string", "description": "Collection to check", "default": "default"}
            }),
            vec![],
        ),
        tool_def(
            "spf_rag_fulfill_search",
            "Mark a SearchSeeker as fulfilled after RAG fetch.",
            json!({
                "seeker_id": {"type": "string", "description": "SearchSeeker ID to fulfill"},
                "collection": {"type": "string", "description": "Collection name", "default": "default"}
            }),
            vec!["seeker_id"],
        ),
        tool_def(
            "spf_rag_smart_search",
            "Run smart search with completeness check - triggers SearchSeeker if <80%.",
            json!({
                "query": {"type": "string", "description": "Search query"},
                "collection": {"type": "string", "description": "Collection to search", "default": "default"}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_rag_auto_fetch_gaps",
            "Automatically fetch data for all pending SearchSeekers.",
            json!({
                "collection": {"type": "string", "description": "Collection to check", "default": "default"},
                "max_fetches": {"type": "integer", "description": "Max URLs to fetch", "default": 5}
            }),
            vec![],
        ),

        // ====== SPF_CONFIG TOOLS ======
        // NOTE: spf_config_get and spf_config_set removed from MCP - user-only via CLI
        tool_def(
            "spf_config_paths",
            "List all path rules (allowed/blocked) from SPF_CONFIG LMDB.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_config_stats",
            "Get SPF_CONFIG LMDB statistics.",
            json!({}),
            vec![],
        ),

        // ====== TMP_DB TOOLS ======
        tool_def(
            "spf_tmp_list",
            "List all registered projects with trust levels.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_tmp_stats",
            "Get TMP_DB LMDB statistics (project count, access log count, resource count).",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_tmp_get",
            "Get project info by path.",
            json!({
                "path": {"type": "string", "description": "Project path to look up"}
            }),
            vec!["path"],
        ),
        tool_def(
            "spf_tmp_active",
            "Get the currently active project.",
            json!({}),
            vec![],
        ),

        // ====== AGENT_STATE TOOLS ======
        tool_def(
            "spf_agent_stats",
            "Get AGENT_STATE LMDB statistics (memory count, sessions, state keys, tags).",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_agent_memory_search",
            "Search agent memories by content.",
            json!({
                "query": {"type": "string", "description": "Search query"},
                "limit": {"type": "integer", "description": "Max results (default: 10)"}
            }),
            vec!["query"],
        ),
        tool_def(
            "spf_agent_memory_by_tag",
            "Get agent memories by tag.",
            json!({
                "tag": {"type": "string", "description": "Tag to filter by"}
            }),
            vec!["tag"],
        ),
        tool_def(
            "spf_agent_session_info",
            "Get the most recent session info.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_agent_context",
            "Get context summary for session continuity.",
            json!({}),
            vec![],
        ),
        // ====== MESH TOOLS ======
        tool_def(
            "spf_mesh_status",
            "Get mesh network status, role, team, and identity",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_mesh_peers",
            "List known/trusted mesh peers",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_mesh_call",
            "Call a peer agent's tool via mesh network",
            json!({
                "peer_key": {"type": "string", "description": "Peer's Ed25519 public key (hex)"},
                "tool": {"type": "string", "description": "Tool name to call on peer"},
                "arguments": {"type": "object", "description": "Tool arguments (optional)"}
            }),
            vec!["peer_key", "tool"],
        ),
        // ====== VOICE TOOLS (Block DD) ======
        tool_def(
            "spf_voice_mode",
            "Control voice pipeline: start/stop audio, TTS speech synthesis, session status, and mic capture. Actions: start, stop, status, speak, listen, stream_on, stream_off, stream_read. SPFsmartGATE",
            json!({
                "action": {"type": "string", "description": "Action: start, stop, status, speak, listen, stream_on, stream_off, or stream_read"},
                "text": {"type": "string", "description": "Text to synthesize (required for 'speak' action)"},
                "sample_rate": {"type": "integer", "description": "Sample rate Hz (optional, default: 16000)"},
                "duration": {"type": "integer", "description": "Capture duration in seconds for 'listen' action (default: 5, max: 60)"}
            }),
            vec!["action"],
        ),
        tool_def(
            "spf_voice_call",
            "Initiate or manage a peer-to-peer voice call. Actions: start (ring peer), accept (answer incoming), reject (decline incoming), end (hang up), status.",
            json!({
                "action": {"type": "string", "description": "Action: start, accept, reject, end, or status"},
                "peer_key": {"type": "string", "description": "Target peer Ed25519 public key hex — required for start"},
                "peer_name": {"type": "string", "description": "Human-readable name for this peer (optional, used in display)"}
            }),
            vec!["action"],
        ),
        tool_def(
            "spf_voice_team",
            "Manage voice team channels for group audio. Actions: create, join, leave, add (invite peer), list, status.",
            json!({
                "action": {"type": "string", "description": "Action: create, join, leave, add, list, or status"},
                "team_id": {"type": "string", "description": "Team channel ID — defaults to 'default'"},
                "name": {"type": "string", "description": "Channel display name — required for create"},
                "peer_key": {"type": "string", "description": "Peer Ed25519 public key hex — required for add"},
                "display_name": {"type": "string", "description": "Display name for yourself when joining (optional)"}
            }),
            vec!["action"],
        ),
        // ====== CHAT TOOLS (Block GG) ======
        tool_def(
            "spf_chat_send",
            "Send a text message to a mesh peer. Creates conversation if needed. Message delivered via QUIC mesh.",
            json!({
                "peer_key": {"type": "string", "description": "Peer's Ed25519 public key (hex)"},
                "text": {"type": "string", "description": "Message text to send"},
                "conversation_id": {"type": "string", "description": "Conversation ID (optional, auto-generated from peer keys)"}
            }),
            vec!["peer_key", "text"],
        ),
        tool_def(
            "spf_chat_history",
            "Get chat message history. Without conversation_id lists all conversations. With conversation_id shows messages.",
            json!({
                "conversation_id": {"type": "string", "description": "Conversation ID (optional, omit to list all)"},
                "limit": {"type": "integer", "description": "Max messages to return (default: 20)"}
            }),
            vec![],
        ),
        tool_def(
            "spf_chat_rooms",
            "List all active chat conversations with participant info and message counts.",
            json!({}),
            vec![],
        ),
        // ====== FLINT WORKER MODE (Block II) ======
        tool_def(
            "spf_flint_execute",
            "Execute any SPF tool through FLINT worker mode. FLINT acts as your hands — tell it which tool to run and why. The inner tool also passes through the gate.",
            json!({
                "tool_name": {"type": "string", "description": "Name of the SPF tool to execute (e.g. spf_brain_search, spf_mesh_call)"},
                "arguments": {"type": "object", "description": "Arguments to pass to the tool"},
                "reason": {"type": "string", "description": "Why FLINT should execute this tool (logged for training)"}
            }),
            vec!["tool_name"],
        ),
        // ====== SPF_FS Tools — REMOVED FROM AI AGENT REGISTRY ======
        // spf_fs_exists, spf_fs_stat, spf_fs_ls, spf_fs_read,
        // spf_fs_write, spf_fs_mkdir, spf_fs_rm, spf_fs_rename
        // These are USER/SYSTEM-ONLY tools. Not exposed to AI agents via MCP.
        // Hard-blocked in gate.rs as additional defense in depth.

        // ====== NETWORK POOL TOOLS (Block NP) ======
        tool_def(
            "spf_pool_status",
            "Get network pool status: worker roles, idle/busy counts, active tasks. NetAdmin shows full pool; Worker shows own status.",
            json!({}),
            vec![],
        ),
        tool_def(
            "spf_pool_assign",
            "Assign a task to an idle worker in the pool. NetAdmin only. Returns task_id and worker info.",
            json!({
                "tool": {"type": "string", "description": "Tool name to execute on the worker"},
                "worker_name": {"type": "string", "description": "Target worker name (optional — auto-selects idle if omitted)"}
            }),
            vec!["tool"],
        ),
        tool_def(
            "spf_pool_release",
            "Release a worker from a task and record proof of work receipt. NetAdmin only.",
            json!({
                "task_id": {"type": "string", "description": "Task ID returned by spf_pool_assign"},
                "result": {"type": "object", "description": "Task result JSON for proof of work hash (optional)"}
            }),
            vec!["task_id"],
        ),

        // ====== CHANNEL HUB (Block CH) ======
        tool_def(
            "spf_channel",
            "Universal agent communication channel. Actions: create (new channel), join (enter channel), leave (exit channel), send (post message), listen (drain inbound buffer), history (get messages), list (show all channels), connect (WS client to remote hub), disconnect (close WS client), status (connection info). Hub runs on orchestrator; agents connect via WebSocket for instant full-duplex push messaging.",
            json!({
                "action": {"type": "string", "description": "Action: create, join, leave, send, listen, history, list, connect, disconnect, status"},
                "channel_id": {"type": "string", "description": "Channel ID (e.g. ch-1) — required for join, leave, send, listen, history, connect"},
                "name": {"type": "string", "description": "Channel name (for create) or display name (for join/connect)"},
                "text": {"type": "string", "description": "Message text (for send action)"},
                "msg_type": {"type": "string", "description": "Message type: text, tool_result, system (default: text)"},
                "hub_url": {"type": "string", "description": "Hub HTTP URL (for connect action, e.g. http://192.168.1.10:8080)"},
                "limit": {"type": "integer", "description": "Max messages to return (for history/listen, default: 50)"}
            }),
            vec!["action"],
        ),
    ];
    // ====== TRANSFORMER TOOLS (Block K) ======
    tools.extend(crate::transformer_tools::tool_definitions());
    tools
}

// ============================================================================
// TOOL ALIAS MAP — QW-1: External LLM compatibility (Qwen, etc)
// ============================================================================

/// Maps external/unprefixed tool names to internal SPF tool names.
/// Enables Qwen and other LLMs to call tools without "spf_" prefix.
/// Called at the start of handle_tool_call() to normalize incoming names.
/// Additive-only — existing callers unaffected. Zero breaking changes.
pub fn tool_alias_map(name: &str) -> &str {
    match name {
        "read" => "Read", "write" => "Write", "edit" => "Edit",
        "bash" => "Bash", "glob" => "Glob", "grep" => "Grep",
        "calculate" => "spf_calculate", "status" => "spf_status", "session" => "spf_session",
        "brain_search" => "spf_brain_search", "brain_store" => "spf_brain_store",
        "flint_store" => "spf_flint_store",
        "brain_context" => "spf_brain_context", "brain_index" => "spf_brain_index",
        "brain_list" => "spf_brain_list", "brain_status" => "spf_brain_status",
        "brain_recall" => "spf_brain_recall", "brain_list_docs" => "spf_brain_list_docs",
        "brain_get_doc" => "spf_brain_get_doc",
        "web_search" => "spf_web_search", "web_fetch" => "spf_web_fetch",
        "web_download" => "spf_web_download", "web_api" => "spf_web_api",
        "web_connect" => "spf_web_connect", "web_navigate" => "spf_web_navigate",
        "web_click" => "spf_web_click", "web_fill" => "spf_web_fill",
        "web_select" => "spf_web_select", "web_eval" => "spf_web_eval",
        "web_screenshot" => "spf_web_screenshot", "web_design" => "spf_web_design",
        "web_page" => "spf_web_page",

        "mesh_status" => "spf_mesh_status", "mesh_peers" => "spf_mesh_peers",
        "mesh_call" => "spf_mesh_call",
        "transformer_status" => "spf_transformer_status",
        "transformer_infer" => "spf_transformer_infer",
        "transformer_chat" => "spf_transformer_chat",
        "transformer_train" => "spf_transformer_train",
        "transformer_metrics" => "spf_transformer_metrics",
        "flint_train_evil" => "spf_flint_train_evil",
        "flint_train_good" => "spf_flint_train_good",
        "pool_status" => "spf_pool_status", "pool_assign" => "spf_pool_assign",
        "pool_release" => "spf_pool_release",
        "voice_mode" => "spf_voice_mode", "voice_call" => "spf_voice_call",
        "voice_team" => "spf_voice_team",
        "chat_send" => "spf_chat_send", "chat_history" => "spf_chat_history",
        "chat_rooms" => "spf_chat_rooms",
        "flint_execute" => "spf_flint_execute",
        "agent_stats" => "spf_agent_stats", "agent_memory_search" => "spf_agent_memory_search",
        "agent_memory_by_tag" => "spf_agent_memory_by_tag",
        "agent_session_info" => "spf_agent_session_info", "agent_context" => "spf_agent_context",
        "config_paths" => "spf_config_paths", "config_stats" => "spf_config_stats",
        "tmp_list" => "spf_tmp_list", "tmp_stats" => "spf_tmp_stats",
        "tmp_get" => "spf_tmp_get", "tmp_active" => "spf_tmp_active",
        "notebook_edit" => "spf_notebook_edit",
        "channel" => "spf_channel",
        "rag_collect_web" => "spf_rag_collect_web", "rag_collect_file" => "spf_rag_collect_file",
        "rag_collect_folder" => "spf_rag_collect_folder", "rag_collect_drop" => "spf_rag_collect_drop",
        "rag_index_gathered" => "spf_rag_index_gathered", "rag_dedupe" => "spf_rag_dedupe",
        "rag_status" => "spf_rag_status", "rag_list_gathered" => "spf_rag_list_gathered",
        "rag_bandwidth_status" => "spf_rag_bandwidth_status", "rag_fetch_url" => "spf_rag_fetch_url",
        "rag_collect_rss" => "spf_rag_collect_rss", "rag_list_feeds" => "spf_rag_list_feeds",
        "rag_pending_searches" => "spf_rag_pending_searches",
        "rag_fulfill_search" => "spf_rag_fulfill_search",
        "rag_smart_search" => "spf_rag_smart_search",
        "rag_auto_fetch_gaps" => "spf_rag_auto_fetch_gaps",
        _ => name,
    }
}

// ============================================================================
// LMDB PARTITION ROUTING — virtual filesystem mount points
// ============================================================================

/// Route spf_fs_* calls to the correct LMDB partition based on path prefix.
/// Returns Some(result) if routed, None to fall through to SpfFs (LMDB 1).
fn route_to_lmdb(
    path: &str,
    op: &str,
    content: Option<&str>,
    config_db: &Option<SpfConfigDb>,
    tmp_db: &Option<SpfTmpDb>,
    agent_db: &Option<AgentStateDb>,
) -> Option<Value> {
    let live_base = spf_root().join("LIVE").display().to_string();

    if path == "/config" || path.starts_with("/config/") {
        return Some(route_config(path, op, config_db));
    }
    // /tmp — device-backed directory in LIVE/TMP/TMP/
    if path == "/tmp" || path.starts_with("/tmp/") {
        let device_tmp = format!("{}/TMP/TMP", live_base);
        return Some(route_device_dir(path, "/tmp", &device_tmp, op, content, tmp_db));
    }
    // /projects — device-backed directory in LIVE/PROJECTS/PROJECTS/
    if path == "/projects" || path.starts_with("/projects/") {
        let device_projects = format!("{}/PROJECTS/PROJECTS", live_base);
        return Some(route_device_dir(path, "/projects", &device_projects, op, content, tmp_db));
    }
    // /home/agent/tmp → redirect to /tmp device directory
    if path == "/home/agent/tmp" || path.starts_with("/home/agent/tmp/") {
        let redirected = path.replacen("/home/agent/tmp", "/tmp", 1);
        let device_tmp = format!("{}/TMP/TMP", live_base);
        return Some(route_device_dir(&redirected, "/tmp", &device_tmp, op, content, tmp_db));
    }
    if path == "/home/agent" || path.starts_with("/home/agent/") {
        // Write permission check for /home/agent/* — ALL writes blocked
        if matches!(op, "write" | "mkdir" | "rm" | "rename") {
            return Some(json!({"type": "text", "text": format!("BLOCKED: {} is read-only in /home/agent/", path)}));
        }
        // Read ops route to agent handler
        return Some(route_agent(path, op, agent_db));
    }
    None
}

/// LMDB 2 — SPF_CONFIG mount at /config/
fn route_config(path: &str, op: &str, config_db: &Option<SpfConfigDb>) -> Value {
    let db = match config_db {
        Some(db) => db,
        None => return json!({"type": "text", "text": "SPF_CONFIG LMDB not initialized"}),
    };

    let relative = path.strip_prefix("/config").unwrap_or("").trim_start_matches('/');

    match op {
        "ls" => {
            if relative.is_empty() {
                json!({"type": "text", "text": "/config:\n-644        0 version\n-644        0 mode\n-644        0 tiers\n-644        0 formula\n-644        0 weights\n-644        0 paths\n-644        0 patterns"})
            } else {
                json!({"type": "text", "text": format!("/config/{}: not a directory", relative)})
            }
        }
        "read" => {
            match relative {
                "version" => match db.get("spf", "version") {
                    Ok(Some(v)) => json!({"type": "text", "text": v}),
                    Ok(None) => json!({"type": "text", "text": "not set"}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "mode" => match db.get_enforce_mode() {
                    Ok(mode) => json!({"type": "text", "text": format!("{:?}", mode)}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "tiers" => match db.get_tiers() {
                    Ok(tiers) => json!({"type": "text", "text": serde_json::to_string_pretty(&tiers).unwrap_or_else(|e| format!("error: {}", e))}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "formula" => match db.get_formula() {
                    Ok(formula) => json!({"type": "text", "text": serde_json::to_string_pretty(&formula).unwrap_or_else(|e| format!("error: {}", e))}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "weights" => match db.get_weights() {
                    Ok(weights) => json!({"type": "text", "text": serde_json::to_string_pretty(&weights).unwrap_or_else(|e| format!("error: {}", e))}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "paths" => match db.list_path_rules() {
                    Ok(rules) => {
                        let text = rules.iter()
                            .map(|(t, p)| format!("{}: {}", t, p))
                            .collect::<Vec<_>>()
                            .join("\n");
                        json!({"type": "text", "text": if text.is_empty() { "No path rules".to_string() } else { text }})
                    }
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "patterns" => match db.list_dangerous_patterns() {
                    Ok(patterns) => {
                        let text = patterns.iter()
                            .map(|(p, s)| format!("{} (severity: {})", p, s))
                            .collect::<Vec<_>>()
                            .join("\n");
                        json!({"type": "text", "text": if text.is_empty() { "No patterns".to_string() } else { text }})
                    }
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                },
                "" => json!({"type": "text", "text": "/config is a directory (use ls)"}),
                _ => json!({"type": "text", "text": format!("not found: /config/{}", relative)}),
            }
        }
        "exists" => {
            let exists = relative.is_empty() || matches!(relative, "version" | "mode" | "tiers" | "formula" | "weights" | "paths" | "patterns");
            json!({"type": "text", "text": format!("/config/{}: {}", relative, if exists { "EXISTS" } else { "NOT FOUND" })})
        }
        "stat" => {
            if relative.is_empty() {
                json!({"type": "text", "text": "Path: /config\nType: Directory\nMount: CONFIG (CONFIG.DB)"})
            } else if matches!(relative, "version" | "mode" | "tiers" | "formula" | "weights" | "paths" | "patterns") {
                json!({"type": "text", "text": format!("Path: /config/{}\nType: File\nMount: CONFIG (CONFIG.DB)\nSource: config_db.{}", relative, relative)})
            } else {
                json!({"type": "text", "text": format!("Not found: /config/{}", relative)})
            }
        }
        "write" | "mkdir" | "rm" | "rename" => {
            json!({"type": "text", "text": "BLOCKED: /config is a read-only mount (use spf_config_* tools)"})
        }
        _ => json!({"type": "text", "text": format!("unsupported operation: {}", op)}),
    }
}

/// Device-backed directory mount: files on device disk, OS provides metadata.
/// Used for /tmp/ and /projects/ — real device filesystem, not LMDB blobs.
fn route_device_dir(
    virtual_path: &str,
    mount_prefix: &str,
    device_base: &str,
    op: &str,
    content: Option<&str>,
    tmp_db: &Option<SpfTmpDb>,
) -> Value {
    let relative = virtual_path.strip_prefix(mount_prefix)
        .unwrap_or("")
        .trim_start_matches('/');

    // Path traversal protection — reject any relative path containing ..
    if relative.contains("..") {
        return json!({"type": "text", "text": format!(
            "BLOCKED: path traversal detected in {}", virtual_path
        )});
    }

    let device_path = if relative.is_empty() {
        std::path::PathBuf::from(device_base)
    } else {
        std::path::PathBuf::from(device_base).join(relative)
    };

    match op {
        "ls" => {
            match std::fs::read_dir(&device_path) {
                Ok(entries) => {
                    let mut items: Vec<String> = Vec::new();
                    for entry in entries.flatten() {
                        let name = entry.file_name().to_string_lossy().to_string();
                        let meta = entry.metadata().ok();
                        let (prefix, size) = match &meta {
                            Some(m) if m.is_dir() => ("d755", 0u64),
                            Some(m) => ("-644", m.len()),
                            None => ("-???", 0u64),
                        };
                        items.push(format!("{} {:>8} {}", prefix, size, name));
                    }
                    items.sort();
                    if items.is_empty() {
                        json!({"type": "text", "text": format!("{}: empty", virtual_path)})
                    } else {
                        json!({"type": "text", "text": format!("{}:\n{}", virtual_path, items.join("\n"))})
                    }
                }
                Err(_) if !device_path.exists() => {
                    json!({"type": "text", "text": format!("{}: empty", virtual_path)})
                }
                Err(e) => {
                    json!({"type": "text", "text": format!("error listing {}: {}", virtual_path, e)})
                }
            }
        }
        "read" => {
            if relative.is_empty() {
                json!({"type": "text", "text": format!("{} is a directory (use ls)", virtual_path)})
            } else {
                match std::fs::read(&device_path) {
                    Ok(bytes) => {
                        match String::from_utf8(bytes.clone()) {
                            Ok(data) => {
                                if let Some(db) = tmp_db {
                                    let _ = db.log_access(virtual_path, device_base, "read", "device", data.len() as u64, true, None);
                                }
                                json!({"type": "text", "text": data})
                            }
                            Err(_) => {
                                if let Some(db) = tmp_db {
                                    let _ = db.log_access(virtual_path, device_base, "read", "device", bytes.len() as u64, true, None);
                                }
                                json!({"type": "text", "text": utf8_safe::binary_info(&bytes)})
                            }
                        }
                    }
                    Err(e) => json!({"type": "text", "text": format!("error reading {}: {}", virtual_path, e)}),
                }
            }
        }
        "write" => {
            if let Some(data) = content {
                if let Some(parent) = device_path.parent() {
                    let _ = std::fs::create_dir_all(parent);
                }
                match std::fs::write(&device_path, data) {
                    Ok(()) => {
                        // Log write to TMP_DB
                        if let Some(db) = tmp_db {
                            let _ = db.log_access(virtual_path, device_base, "write", "device", data.len() as u64, true, None);
                        }
                        json!({"type": "text", "text": format!("Written: {} ({} bytes)", virtual_path, data.len())})
                    }
                    Err(e) => json!({"type": "text", "text": format!("write failed: {}", e)}),
                }
            } else {
                json!({"type": "text", "text": "write requires content"})
            }
        }
        "exists" => {
            let exists = device_path.exists();
            json!({"type": "text", "text": format!("{}: {}", virtual_path, if exists { "EXISTS" } else { "NOT FOUND" })})
        }
        "stat" => {
            match std::fs::metadata(&device_path) {
                Ok(meta) => {
                    let file_type = if meta.is_dir() { "Directory" } else { "File" };
                    json!({"type": "text", "text": format!(
                        "Path: {}\nType: {}\nSize: {}\nMount: device ({})\nAccess: read-write",
                        virtual_path, file_type, meta.len(), device_base
                    )})
                }
                Err(_) => json!({"type": "text", "text": format!("{}: NOT FOUND", virtual_path)}),
            }
        }
        "mkdir" => {
            match std::fs::create_dir_all(&device_path) {
                Ok(()) => json!({"type": "text", "text": format!("Directory created: {}", virtual_path)}),
                Err(e) => json!({"type": "text", "text": format!("mkdir failed: {}", e)}),
            }
        }
        "rm" => {
            if device_path.is_dir() {
                match std::fs::remove_dir(&device_path) {
                    Ok(()) => json!({"type": "text", "text": format!("Removed: {}", virtual_path)}),
                    Err(e) => json!({"type": "text", "text": format!("rm failed (not empty?): {}", e)}),
                }
            } else if device_path.exists() {
                match std::fs::remove_file(&device_path) {
                    Ok(()) => json!({"type": "text", "text": format!("Removed: {}", virtual_path)}),
                    Err(e) => json!({"type": "text", "text": format!("rm failed: {}", e)}),
                }
            } else {
                json!({"type": "text", "text": format!("{}: NOT FOUND", virtual_path)})
            }
        }
        "rename" => {
            // rename needs new_path — handled at spf_fs_rename level
            json!({"type": "text", "text": "rename: use spf_fs_rename with full paths"})
        }
        _ => json!({"type": "text", "text": format!("unsupported operation: {}", op)}),
    }
}

/// LMDB 5 — AGENT_STATE mount at /home/agent/
// ============================================================================
// ROUTE_AGENT REPLACEMENT — Dynamic reads from LMDB5.DB state db
// Copyright 2026 Joseph Stone - All Rights Reserved
//
// REPLACES: lines 1037-1243 in src/mcp.rs
// INSERT: scan_state_dir helper + replacement route_agent function
//
// What changed:
//   1. READ: state db lookup (file:{path} keys) before "not found" catch-all
//   2. LS: skeleton dirs merged with dynamic file: keys from state db
//   3. EXISTS: state db check for file keys and directory prefixes
//   4. State listing filters out file: keys (those belong to LS, not state/)
//   5. New helper: scan_state_dir() scans state keys for directory children
// ============================================================================

/// Scan state db for file: keys that are immediate children of a directory.
/// Returns formatted ls entries like "d755        0 dirname" or "-644        0 filename".
fn scan_state_dir(db: &AgentStateDb, dir_relative: &str) -> Vec<String> {
    let prefix = if dir_relative.is_empty() {
        "file:".to_string()
    } else {
        format!("file:{}/", dir_relative)
    };

    match db.list_state_keys() {
        Ok(keys) => {
            let mut dirs = std::collections::BTreeSet::new();
            let mut files = std::collections::BTreeSet::new();

            for key in &keys {
                if let Some(rest) = key.strip_prefix(&prefix) {
                    if rest.is_empty() { continue; }
                    match rest.find('/') {
                        Some(pos) => { dirs.insert(rest[..pos].to_string()); }
                        None => { files.insert(rest.to_string()); }
                    }
                }
            }

            let mut entries = Vec::new();
            for d in dirs {
                entries.push(format!("d755        0 {}", d));
            }
            for f in files {
                entries.push(format!("-644        0 {}", f));
            }
            entries
        }
        Err(_) => Vec::new(),
    }
}

/// Route /home/agent/* virtual paths to LMDB5 AgentStateDb.
///
/// Three data sources:
/// 1. Skeleton directories (hardcoded structure — defines virtual FS layout)
/// 2. State db file:{path} keys (imported config files — dynamic READ/LS/EXISTS)
/// 3. Dedicated databases (memory, sessions, state, preferences, context)
fn route_agent(path: &str, op: &str, agent_db: &Option<AgentStateDb>) -> Value {
    let db = match agent_db {
        Some(db) => db,
        None => return json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
    };

    let relative = path.strip_prefix("/home/agent").unwrap_or("").trim_start_matches('/');

    match op {
        "ls" => {
            // Special dynamic directories backed by dedicated LMDB databases
            match relative {
                "memory" => {
                    return match db.search_memories("", 100) {
                        Ok(memories) => {
                            let text = memories.iter()
                                .map(|m| format!("-644 {:>8} {}", m.content.len(), m.id))
                                .collect::<Vec<_>>()
                                .join("\n");
                            json!({"type": "text", "text": if text.is_empty() { "/home/agent/memory: empty".to_string() } else { format!("/home/agent/memory:\n{}", text) }})
                        }
                        Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                    };
                }
                "sessions" => {
                    return match db.get_latest_session() {
                        Ok(Some(latest)) => {
                            match db.get_session_chain(&latest.session_id) {
                                Ok(chain) => {
                                    let text = chain.iter()
                                        .map(|s| format!("-644 {:>8} {}", s.total_actions, s.session_id))
                                        .collect::<Vec<_>>()
                                        .join("\n");
                                    json!({"type": "text", "text": format!("/home/agent/sessions:\n{}", text)})
                                }
                                Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                            }
                        }
                        Ok(None) => json!({"type": "text", "text": "/home/agent/sessions: empty"}),
                        Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                    };
                }
                "state" => {
                    // Show state keys EXCEPT file: keys (those are served via LS of their dirs)
                    return match db.list_state_keys() {
                        Ok(keys) => {
                            let text = keys.iter()
                                .filter(|k| !k.starts_with("file:"))
                                .map(|k| format!("-644        0 {}", k))
                                .collect::<Vec<_>>()
                                .join("\n");
                            json!({"type": "text", "text": if text.is_empty() { "/home/agent/state: empty".to_string() } else { format!("/home/agent/state:\n{}", text) }})
                        }
                        Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                    };
                }
                _ => {}
            }

            // Skeleton directories — hardcoded virtual FS structure
            let skeleton: Vec<&str> = match relative {
                "" => vec![
                    "-644        0 .claude.json",
                    "d755        0 .claude",
                    "d755        0 bin",
                    "d755        0 tmp",
                    "d755        0 .config",
                    "d755        0 .local",
                    "d755        0 .cache",
                    "d755        0 .memory",
                    "d755        0 .ssh",
                    "d755        0 Documents",
                    "d755        0 Projects",
                    "d755        0 workspace",
                    "-644        0 preferences",
                    "-644        0 context",
                ],
                ".claude" => vec![
                    "d755        0 projects",
                    "d755        0 file-history",
                    "d755        0 paste-cache",
                    "d755        0 session-env",
                    "d755        0 todos",
                    "d755        0 plans",
                    "d755        0 tasks",
                    "d755        0 shell-snapshots",
                    "d755        0 statsig",
                    "d755        0 telemetry",
                ],
                "bin" => vec![
                    "-755        0 spf-smart-gate",
                    "d755        0 claude-code",
                ],
                ".config" => vec!["d755        0 settings"],
                ".local" => vec![
                    "d755        0 bin",
                    "d755        0 share",
                    "d755        0 state",
                ],
                ".local/share" => vec![
                    "d755        0 history",
                    "d755        0 data",
                ],
                ".local/state" => vec!["d755        0 sessions"],
                ".cache" => vec![
                    "d755        0 context",
                    "d755        0 tmp",
                ],
                ".memory" => vec![
                    "d755        0 facts",
                    "d755        0 instructions",
                    "d755        0 preferences",
                    "d755        0 pinned",
                ],
                ".ssh" => vec![],
                "Documents" => vec![
                    "d755        0 notes",
                    "d755        0 templates",
                ],
                "Projects" => vec![],
                "workspace" => vec!["d755        0 current"],
                _ => vec![],
            };

            // Scan state db for imported file: keys in this directory
            let dynamic = scan_state_dir(db, relative);

            // Merge skeleton + dynamic (deduplicate by name)
            let mut seen = std::collections::HashSet::new();
            let mut entries = Vec::new();
            for entry in &skeleton {
                let name = entry.split_whitespace().last().unwrap_or("");
                if seen.insert(name.to_string()) {
                    entries.push(entry.to_string());
                }
            }
            for entry in &dynamic {
                let name = entry.split_whitespace().last().unwrap_or("");
                if seen.insert(name.to_string()) {
                    entries.push(entry.clone());
                }
            }

            // Known skeleton dirs (even when empty) + any dir with dynamic entries
            let is_known_dir = !skeleton.is_empty() || !dynamic.is_empty()
                || matches!(relative, "" | ".ssh" | "Projects");

            if !is_known_dir {
                json!({"type": "text", "text": format!("/home/agent/{}: not a directory", relative)})
            } else {
                let dir = if relative.is_empty() {
                    "/home/agent".to_string()
                } else {
                    format!("/home/agent/{}", relative)
                };
                if entries.is_empty() {
                    json!({"type": "text", "text": format!("{}: empty", dir)})
                } else {
                    json!({"type": "text", "text": format!("{}:\n{}", dir, entries.join("\n"))})
                }
            }
        }
        "read" => {
            if relative.is_empty() {
                return json!({"type": "text", "text": "/home/agent is a directory (use ls)"});
            }

            // Dedicated handlers for special virtual files
            if relative == "preferences" {
                return match db.get_preferences() {
                    Ok(prefs) => json!({"type": "text", "text": serde_json::to_string_pretty(&prefs).unwrap_or_else(|e| format!("error: {}", e))}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                };
            }
            if relative == "context" {
                return match db.get_context_summary() {
                    Ok(summary) => json!({"type": "text", "text": if summary.is_empty() { "No context available".to_string() } else { summary }}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                };
            }
            if let Some(mem_id) = relative.strip_prefix("memory/") {
                return match db.recall(mem_id) {
                    Ok(Some(entry)) => json!({"type": "text", "text": format!(
                        "ID: {}\nType: {:?}\nContent: {}\nTags: {}\nSource: {}\nCreated: {}\nAccessed: {} ({}x)\nRelevance: {:.2}",
                        entry.id, entry.memory_type, entry.content,
                        entry.tags.join(", "), entry.source,
                        format_timestamp(entry.created_at), format_timestamp(entry.last_accessed),
                        entry.access_count, entry.relevance
                    )}),
                    Ok(None) => json!({"type": "text", "text": format!("not found: /home/agent/memory/{}", mem_id)}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                };
            }
            if let Some(session_id) = relative.strip_prefix("sessions/") {
                return match db.get_session(session_id) {
                    Ok(Some(ctx)) => json!({"type": "text", "text": format!(
                        "Session: {}\nParent: {}\nStarted: {}\nEnded: {}\nDir: {}\nActions: {}\nComplexity: {}\nFiles modified: {}\nSummary: {}",
                        ctx.session_id,
                        ctx.parent_session.as_deref().unwrap_or("none"),
                        format_timestamp(ctx.started_at), format_timestamp(ctx.ended_at),
                        ctx.working_dir, ctx.total_actions, ctx.total_complexity,
                        ctx.files_modified.join(", "),
                        if ctx.summary.is_empty() { "none" } else { &ctx.summary }
                    )}),
                    Ok(None) => json!({"type": "text", "text": format!("not found: /home/agent/sessions/{}", session_id)}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                };
            }
            if let Some(key) = relative.strip_prefix("state/") {
                return match db.get_state(key) {
                    Ok(Some(value)) => json!({"type": "text", "text": value}),
                    Ok(None) => json!({"type": "text", "text": format!("not found: /home/agent/state/{}", key)}),
                    Err(e) => json!({"type": "text", "text": format!("error: {}", e)}),
                };
            }

            // Dynamic read from state db — imported config files (file:{path} keys)
            let file_key = format!("file:{}", relative);
            match db.get_state(&file_key) {
                Ok(Some(content)) => json!({"type": "text", "text": content}),
                Ok(None) => json!({"type": "text", "text": format!("not found: /home/agent/{}", relative)}),
                Err(e) => json!({"type": "text", "text": format!("error reading {}: {}", relative, e)}),
            }
        }
        "exists" => {
            // Hardcoded skeleton paths always exist
            let hardcoded = matches!(relative,
                "" | "memory" | "sessions" | "state" | "preferences" | "context"
                | ".claude" | ".claude.json" | "bin" | "tmp" | ".config" | ".local"
                | ".cache" | ".memory" | ".ssh" | "Documents" | "Projects" | "workspace"
            )
                || relative.starts_with("memory/")
                || relative.starts_with("sessions/")
                || relative.starts_with("state/");

            if hardcoded {
                return json!({"type": "text", "text": format!("/home/agent/{}: EXISTS", relative)});
            }

            // Check state db for file: key (imported config file)
            let file_key = format!("file:{}", relative);
            let is_file = db.get_state(&file_key).ok().flatten().is_some();

            // Check if it's a directory containing file: keys
            let is_dir = if !is_file {
                let dir_prefix = format!("file:{}/", relative);
                db.list_state_keys().ok()
                    .map(|keys| keys.iter().any(|k| k.starts_with(&dir_prefix)))
                    .unwrap_or(false)
            } else {
                false
            };

            let exists = is_file || is_dir;
            json!({"type": "text", "text": format!("/home/agent/{}: {}",
                relative, if exists { "EXISTS" } else { "NOT FOUND" })})
        }
        "stat" => {
            if relative.is_empty() {
                json!({"type": "text", "text": "Path: /home/agent\nType: Directory\nMount: AGENT_STATE (LMDB5.DB)"})
            } else {
                json!({"type": "text", "text": format!("Path: /home/agent/{}\nMount: AGENT_STATE (LMDB5.DB)", relative)})
            }
        }
        "write" | "mkdir" | "rm" | "rename" => {
            json!({"type": "text", "text": "BLOCKED: /home/agent is a read-only mount (use spf_agent_* tools)"})
        }
        _ => json!({"type": "text", "text": format!("unsupported operation: {}", op)}),
    }
}

/// Extract ToolParams from raw JSON args for entry-point gate check.
/// Handles field name variants: path/file_path, pattern/command.
pub fn extract_gate_params(args: &Value) -> ToolParams {
    ToolParams {
        file_path: args["file_path"].as_str()
            .or_else(|| args["path"].as_str())
            .or_else(|| args["absolute_path"].as_str())
            .map(String::from),
        content: args["content"].as_str().map(String::from),
        command: args["command"].as_str()
            .or_else(|| args["tool"].as_str())      // spf_mesh_call uses "tool" arg
            .or_else(|| args["pattern"].as_str()).map(String::from),
        old_string: args["old_string"].as_str().map(String::from),
        new_string: args["new_string"].as_str().map(String::from),
        replace_all: args["replace_all"].as_bool(),
        query: args["query"].as_str().map(String::from),
        pattern: args["pattern"].as_str().map(String::from),
        path: args["path"].as_str().map(String::from),
        url: args["url"].as_str().map(String::from),
        topic: args["topic"].as_str().map(String::from),
        category: args["category"].as_str().map(String::from),
        text: args["text"].as_str().map(String::from),
        collection: args["collection"].as_str().map(String::from),
        title: args["title"].as_str().map(String::from),
        limit: args["limit"].as_u64(),
        tool_name: args["tool_name"].as_str().map(String::from),
        reason: args["reason"].as_str().map(String::from),
        peer_key: args["peer_key"].as_str().map(String::from),
        message: args["message"].as_str().map(String::from),
        prompt: args["prompt"].as_str().map(String::from),
        batch_size: args["batch_size"].as_u64(),
    }
}

/// Handle a tool call
pub fn handle_tool_call(
    name: &str,
    args: &Value,
    source: crate::dispatch::Source,
    gate_decision: &crate::gate::GateDecision,
    config: &SpfConfig,
    session: &mut Session,
    storage: &SpfStorage,
    config_db: &Option<SpfConfigDb>,
    tmp_db: &Option<SpfTmpDb>,
    _fs_db: &Option<SpfFs>,
    agent_db: &Option<AgentStateDb>,
    pub_key_hex: &str,
    mesh_tx: &Option<std::sync::mpsc::Sender<crate::mesh::MeshRequest>>,
    peers: &std::collections::HashMap<String, crate::identity::PeerInfo>,
    transformer: &Option<std::sync::Arc<std::sync::RwLock<crate::transformer_tools::TransformerState>>>,
    transformer_config: &crate::config::TransformerConfig,
    network_config: &crate::config::NetworkConfig,
    pool_state: &Option<std::sync::Arc<crate::network::PoolState>>,
    pipeline: &std::sync::Arc<std::sync::Mutex<crate::pipeline::PipelineState>>,
    browser: &std::sync::Mutex<crate::browser::BrowserSession>,
    ws_browser_channels: &std::sync::Mutex<Option<crate::browser::WsBrowserChannels>>,
    http_port: u16,
    tracked_peers: &std::sync::Mutex<std::collections::HashMap<String, crate::http::MeshPeerStatus>>,
    orchestrator_state: &std::sync::Mutex<Option<Arc<std::sync::Mutex<crate::orchestrator::OrchestratorState>>>>,
    endpoint: &std::sync::Mutex<Option<iroh::Endpoint>>,
    tokio_handle: &std::sync::Mutex<Option<tokio::runtime::Handle>>,
) -> Value {
    // QW-1: Resolve tool alias before routing — enables unprefixed calls from Qwen/external LLMs
    let name = tool_alias_map(name);
    match name {
        // ====== spf_gate ======
        // spf_gate REMOVED — was a bypass vector
        "spf_gate" => {
            json!({"type": "text", "text": "BLOCKED: spf_gate removed — gate is internal only", "_blocked": true})
        }

        // ====== spf_calculate ======
        "spf_calculate" => {
            let tool = args["tool"].as_str().unwrap_or("unknown");
            let params: ToolParams = serde_json::from_value(
                args.get("params").cloned().unwrap_or(json!({}))
            ).unwrap_or_else(|_| ToolParams {
                ..Default::default()
            });
            let result = calculate::calculate(tool, &params, config);
            json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap()})
        }

        // ====== spf_status ======
        "spf_status" => {
            let status = format!(
                "SPF Gateway v{}\nMode: {:?}\nSession: {}\nTiers: SIMPLE(<500) LIGHT(<2000) MEDIUM(<10000) CRITICAL(>10000)\nFormula: a_optimal(C) = {} × (1 - 1/ln(C + e))",
                SERVER_VERSION,
                config.enforce_mode,
                session.status_summary(),
                config.formula.w_eff,
            );
            json!({"type": "text", "text": status})
        }

        // ====== spf_session ======
        "spf_session" => {
            let mode = args["mode"].as_str().unwrap_or("full");
            let limit = args["limit"].as_u64().unwrap_or(0) as usize;

            match mode {
                "summary" => {
                    // Compact summary — ~200 tokens instead of 10k+
                    let blocked = session.manifest.iter().filter(|m| m.action == "BLOCKED").count();
                    let allowed = session.manifest.iter().filter(|m| m.action == "ALLOWED").count();
                    let last_manifest = session.manifest.last().map(|m| {
                        format!("{} {} (C={}) {}", m.tool, m.action,
                            m.c, m.command.as_deref().unwrap_or(""))
                    }).unwrap_or_else(|| "none".to_string());

                    json!({"type": "text", "text": format!(
                        "Session Summary:\n  Actions: {}\n  Files read: {}\n  Files written: {}\n  Anchor ratio: {}\n  Manifest: {} allowed, {} blocked\n  Failures: {}\n  Last tool: {}\n  Last manifest: {}\n  Uptime: {}s",
                        session.action_count,
                        session.files_read.len(),
                        session.files_written.len(),
                        session.anchor_ratio(),
                        allowed, blocked,
                        session.failures.len(),
                        session.last_tool.as_deref().unwrap_or("none"),
                        last_manifest,
                        (chrono::Utc::now() - session.started).num_seconds(),
                    )})
                }
                _ => {
                    // Full mode — optionally limit manifest/complexity entries
                    if limit > 0 {
                        let mut limited = session.clone();
                        if limited.manifest.len() > limit {
                            let start = limited.manifest.len() - limit;
                            limited.manifest = limited.manifest[start..].to_vec();
                        }
                        if limited.complexity_history.len() > limit {
                            let start = limited.complexity_history.len() - limit;
                            limited.complexity_history = limited.complexity_history[start..].to_vec();
                        }
                        json!({"type": "text", "text": serde_json::to_string_pretty(&limited).unwrap()})
                    } else {
                        json!({"type": "text", "text": serde_json::to_string_pretty(session).unwrap()})
                    }
                }
            }
        }

        // ====== spf_read ======
        "spf_read" | "Read" => {
            let file_path = args["file_path"].as_str()
                .or_else(|| args["absolute_path"].as_str())
                .unwrap_or("");

            // Execute read — binary-safe: text gets line display, binary gets SHA-256 fingerprint
            match std::fs::read(file_path) {
                Ok(bytes) => {
                    session.track_read(file_path);
                    session.record_action("Read", "success", Some(file_path));
                    let _ = storage.save_session(session);

                    match String::from_utf8(bytes.clone()) {
                        Ok(content) => {
                            // Apply limit/offset if specified
                            let offset = args.get("offset").and_then(|v| v.as_u64()).unwrap_or(0) as usize;
                            let limit = args.get("limit").and_then(|v| v.as_u64()).unwrap_or(0) as usize;

                            let lines: Vec<&str> = content.lines().collect();
                            let total = lines.len();
                            let start = offset.min(total);
                            let end = if limit > 0 { (start + limit).min(total) } else { total };

                            let numbered: String = lines[start..end]
                                .iter()
                                .enumerate()
                                .map(|(i, line)| format!("{:>6}\t{}", start + i + 1, line))
                                .collect::<Vec<_>>()
                                .join("\n");

                            json!({"type": "text", "text": format!("File: {} ({} lines)\n{}", file_path, total, numbered)})
                        }
                        Err(_) => {
                            // Binary file — return fingerprint, not corrupt content
                            json!({"type": "text", "text": utf8_safe::binary_info(&bytes)})
                        }
                    }
                }
                Err(e) => {
                    session.record_action("Read", "failed", Some(file_path));
                    session.record_failure("Read", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Read failed: {}", e)})
                }
            }
        }

        // ====== spf_write ======
        "spf_write" | "Write" => {
            let file_path = args["file_path"].as_str().unwrap_or("");
            let content = args["content"].as_str().unwrap_or("");

            // Execute write
            // Ensure parent directory exists
            if let Some(parent) = std::path::Path::new(file_path).parent() {
                let _ = std::fs::create_dir_all(parent);
            }

            match std::fs::write(file_path, content) {
                Ok(()) => {
                    session.track_write(file_path);
                    session.record_action("Write", "success", Some(file_path));
                    session.record_manifest_detailed("Write", gate_decision.complexity.c, "ALLOWED", None, Some(file_path), &[file_path.to_string()]);
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!(
                        "Written: {} ({} bytes) | C={} {}",
                        file_path, content.len(), gate_decision.complexity.c, gate_decision.complexity.tier
                    )})
                }
                Err(e) => {
                    session.record_action("Write", "failed", Some(file_path));
                    session.record_failure("Write", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Write failed: {}", e)})
                }
            }
        }

        // ====== spf_edit ======
        "spf_edit" | "Edit" => {
            let file_path = args["file_path"].as_str().unwrap_or("");
            let old_string = args["old_string"].as_str().unwrap_or("");
            let new_string = args["new_string"].as_str().unwrap_or("");
            let replace_all = args["replace_all"].as_bool().unwrap_or(false);

            // Execute edit — binary-safe: block binary files with clear error
            let content = match std::fs::read(file_path) {
                Ok(bytes) => match String::from_utf8(bytes) {
                    Ok(text) => text,
                    Err(_) => return json!({"type": "text", "text":
                        format!("Edit blocked: {} is a binary file (not editable as text)", file_path)
                    }),
                },
                Err(e) => {
                    session.record_failure("Edit", &e.to_string());
                    let _ = storage.save_session(session);
                    return json!({"type": "text", "text": format!("Edit read failed: {}", e)});
                }
            };

            let new_content = if replace_all {
                content.replace(old_string, new_string)
            } else {
                content.replacen(old_string, new_string, 1)
            };

            if new_content == content {
                json!({"type": "text", "text": format!("Edit: old_string not found in {}", file_path)})
            } else {
                match std::fs::write(file_path, &new_content) {
                    Ok(()) => {
                        session.track_write(file_path);
                        session.record_action("Edit", "success", Some(file_path));
                        session.record_manifest_detailed("Edit", gate_decision.complexity.c, "ALLOWED", None, Some(file_path), &[file_path.to_string()]);
                        let _ = storage.save_session(session);
                        json!({"type": "text", "text": format!(
                            "Edited: {} | C={} {}",
                            file_path, gate_decision.complexity.c, gate_decision.complexity.tier
                        )})
                    }
                    Err(e) => {
                        session.record_failure("Edit", &e.to_string());
                        let _ = storage.save_session(session);
                        json!({"type": "text", "text": format!("Edit write failed: {}", e)})
                    }
                }
            }
        }

        // ====== spf_bash ======
        "spf_bash" | "Bash" => {
            let command = args["command"].as_str().unwrap_or("");
            let timeout_secs = args["timeout"].as_u64().unwrap_or(30).min(300);

            // Execute bash with timeout enforcement
            let output_result = Command::new("timeout")
                .arg("--signal=KILL")
                .arg(format!("{}s", timeout_secs))
                .arg("bash")
                .arg("-c")
                .arg(command)
                .output()
                .or_else(|_| {
                    // timeout binary not found — fall back to direct execution
                    Command::new("bash")
                        .arg("-c")
                        .arg(command)
                        .output()
                });
            match output_result {
                Ok(output) => {
                    let stdout = utf8_safe::process_output_safe(&output.stdout);
                    let stderr = utf8_safe::process_output_safe(&output.stderr);
                    let success = output.status.success();

                    session.record_action("Bash", if success { "success" } else { "failed" }, None);
                    if !success {
                        session.record_failure("Bash", &stderr);
                    }
                    session.record_manifest_detailed("Bash", gate_decision.complexity.c, "ALLOWED", None, Some(command), &crate::validate::extract_bash_targets(command));
                    let _ = storage.save_session(session);

                    let mut result = String::new();
                    if !stdout.is_empty() {
                        result.push_str(&stdout);
                    }
                    if !stderr.is_empty() {
                        result.push_str("\nSTDERR: ");
                        result.push_str(&stderr);
                    }
                    if result.is_empty() {
                        result = format!("Exit code: {}", output.status.code().unwrap_or(-1));
                    }

                    json!({"type": "text", "text": result})
                }
                Err(e) => {
                    session.record_failure("Bash", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Bash failed: {}", e)})
                }
            }
        }

        // ====== spf_glob ======
        "spf_glob" | "Glob" => {
            let pattern = args["pattern"].as_str().unwrap_or("");
            let path = args["path"].as_str().unwrap_or(".");

            session.record_action("Glob", "called", None);

            // Validate search path is within allowed boundaries
            let search_path = match std::fs::canonicalize(path) {
                Ok(p) => p.to_string_lossy().to_string(),
                Err(_) => {
                    if path.contains("..") {
                        return json!({"type": "text", "text": "BLOCKED: path traversal detected in search path"});
                    }
                    path.to_string()
                }
            };

            if !config.is_path_allowed(&search_path) {
                session.record_manifest("spf_glob", gate_decision.complexity.c, "BLOCKED",
                    Some("Search path outside allowed boundaries"));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": format!(
                    "BLOCKED: glob search path '{}' is outside allowed paths", path
                ), "_blocked": true});
            }

            // READ-ONLY ENFORCEMENT — WHITELIST approach (stronger than blacklist).
            // Only characters valid for filesystem paths and glob patterns are allowed.
            // Command::new().arg() already prevents shell injection, but defense-in-depth
            // rejects anything that isn't a legitimate path or glob character.
            // find with -name is inherently read-only (no -exec, -delete, -execdir possible
            // because only -name flag is hardcoded in the command construction).
            fn is_safe_glob_char(c: char) -> bool {
                c.is_alphanumeric()
                    || matches!(c, '/' | '.' | '-' | '_' | '*' | '?' | '[' | ']'
                        | ' ' | '+' | '@' | ',' | ':' | '~' | '#')
            }
            if !pattern.chars().all(is_safe_glob_char) {
                return json!({"type": "text", "text": "BLOCKED: glob pattern contains disallowed characters (whitelist: alphanumeric . / - _ * ? [ ] + @ , : ~ #)"});
            }
            if !path.chars().all(is_safe_glob_char) {
                return json!({"type": "text", "text": "BLOCKED: search path contains disallowed characters"});
            }
            if pattern.starts_with('-') {
                return json!({"type": "text", "text": "BLOCKED: pattern cannot start with '-' (flag injection)"});
            }
            if path.contains("..") {
                return json!({"type": "text", "text": "BLOCKED: path traversal not allowed in glob"});
            }

            // Safe: arguments passed directly, no shell interpolation
            match Command::new("find")
                .arg(path)
                .arg("-name")
                .arg(pattern)
                .stderr(std::process::Stdio::null())
                .output()
            {
                Ok(output) => {
                    let stdout = utf8_safe::process_output_safe(&output.stdout);
                    // Limit to first 100 results (replaces piped head -100)
                    let truncated: String = stdout.lines().take(100).collect::<Vec<_>>().join("\n");
                    let _ = storage.save_session(session);
                    if truncated.is_empty() {
                        json!({"type": "text", "text": "No matches found"})
                    } else {
                        json!({"type": "text", "text": truncated})
                    }
                }
                Err(e) => {
                    session.record_failure("Glob", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Glob failed: {}", e)})
                }
            }
        }

        // ====== spf_grep ======
        "spf_grep" | "Grep" => {
            let pattern = args["pattern"].as_str().unwrap_or("");
            let path = args["path"].as_str().unwrap_or(".");
            let glob_filter = args["glob"].as_str().unwrap_or("");
            let case_insensitive = args["case_insensitive"].as_bool().unwrap_or(false);
            let context = args["context_lines"].as_u64().unwrap_or(0);

            session.record_action("Grep", "called", None);

            // Validate search path is within allowed boundaries
            let search_path = match std::fs::canonicalize(path) {
                Ok(p) => p.to_string_lossy().to_string(),
                Err(_) => {
                    if path.contains("..") {
                        return json!({"type": "text", "text": "BLOCKED: path traversal detected in search path"});
                    }
                    path.to_string()
                }
            };

            if !config.is_path_allowed(&search_path) {
                session.record_manifest("spf_grep", gate_decision.complexity.c, "BLOCKED",
                    Some("Search path outside allowed boundaries"));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": format!(
                    "BLOCKED: grep search path '{}' is outside allowed paths", path
                ), "_blocked": true});
            }

            // READ-ONLY ENFORCEMENT — WHITELIST approach (stronger than blacklist).
            // Path and glob_filter: only valid filesystem/glob characters allowed.
            // Regex pattern is NOT filtered — regex syntax requires |, $, (), etc.
            // Pattern is protected by "--" separator which prevents flag injection.
            // rg is inherently read-only — cannot modify files under any flags.
            fn is_safe_search_char(c: char) -> bool {
                c.is_alphanumeric()
                    || matches!(c, '/' | '.' | '-' | '_' | '*' | '?' | '[' | ']'
                        | ' ' | '+' | '@' | ',' | ':' | '~' | '#')
            }
            if !path.chars().all(is_safe_search_char) {
                return json!({"type": "text", "text": "BLOCKED: search path contains disallowed characters (whitelist: alphanumeric . / - _ * ? [ ] + @ , : ~ #)"});
            }
            if !glob_filter.is_empty() && !glob_filter.chars().all(is_safe_search_char) {
                return json!({"type": "text", "text": "BLOCKED: glob filter contains disallowed characters"});
            }
            if path.contains("..") {
                return json!({"type": "text", "text": "BLOCKED: path traversal not allowed in grep"});
            }

            // Safe: arguments passed directly, no shell interpolation
            let mut rg = Command::new("rg");
            if case_insensitive {
                rg.arg("-i");
            }
            if context > 0 {
                rg.arg("-C").arg(context.to_string());
            }
            if !glob_filter.is_empty() {
                rg.arg("--glob").arg(glob_filter);
            }
            // "--" prevents pattern from being interpreted as a flag
            rg.arg("--").arg(pattern).arg(path);
            rg.stderr(std::process::Stdio::null());

            match rg.output() {
                Ok(output) => {
                    let stdout = utf8_safe::process_output_safe(&output.stdout);
                    // Limit to first 500 lines (replaces piped head -500)
                    let truncated: String = stdout.lines().take(500).collect::<Vec<_>>().join("\n");
                    let _ = storage.save_session(session);
                    if truncated.is_empty() {
                        json!({"type": "text", "text": "No matches found"})
                    } else {
                        json!({"type": "text", "text": truncated})
                    }
                }
                Err(e) => {
                    session.record_failure("Grep", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Grep failed: {}", e)})
                }
            }
        }

        // ====== spf_web_fetch ======
        "spf_web_fetch" => {
            let url = args["url"].as_str().unwrap_or("");
            let prompt = args["prompt"].as_str().unwrap_or("Summarize this content");

            session.record_action("WebFetch", "called", None);
            match WebClient::new() {
                Ok(client) => {
                    match client.read_page(url) {
                        Ok((text, raw_len, content_type)) => {
                            session.record_manifest("web_fetch", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            let truncated = utf8_safe::safe_truncate(&text, 50000);
                            json!({"type": "text", "text": format!(
                                "Fetched {} ({} bytes, {})\nPrompt: {}\n\n{}",
                                url, raw_len, content_type, prompt, truncated
                            )})
                        }
                        Err(e) => {
                            session.record_failure("WebFetch", &e);
                            session.record_manifest("web_fetch", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": format!("WebFetch failed: {}", e)})
                        }
                    }
                }
                Err(e) => {
                    session.record_failure("WebFetch", &e);
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("WebClient init failed: {}", e)})
                }
            }
        }

        // ====== spf_web_search ======
        "spf_web_search" => {
            let query = args["query"].as_str().unwrap_or("");
            let count = args["count"].as_u64().unwrap_or(10) as u32;

            session.record_action("WebSearch", "called", None);
            match WebClient::new() {
                Ok(client) => {
                    match client.search(query, count) {
                        Ok((engine, results)) => {
                            let mut output = format!("Search '{}' via {} ({} results):\n\n", query, engine, results.len());
                            for (i, r) in results.iter().enumerate() {
                                output.push_str(&format!("{}. {}\n   {}\n   {}\n\n", i + 1, r.title, r.url, r.description));
                            }
                            session.record_manifest("web_search", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": output})
                        }
                        Err(e) => {
                            session.record_failure("WebSearch", &e);
                            session.record_manifest("web_search", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": format!("WebSearch failed: {}", e)})
                        }
                    }
                }
                Err(e) => {
                    session.record_failure("WebSearch", &e);
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("WebClient init failed: {}", e)})
                }
            }
        }

        // ====== spf_web_download ======
        "spf_web_download" => {
            let url = args["url"].as_str().unwrap_or("");
            let save_path = args["save_path"].as_str().unwrap_or("");

            session.record_action("WebDownload", "called", Some(save_path));
            match WebClient::new() {
                Ok(client) => {
                    match client.download(url, save_path) {
                        Ok((size, content_type)) => {
                            session.track_write(save_path);
                            session.record_manifest("web_download", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": format!(
                                "Downloaded {} → {} ({} bytes, {})",
                                url, save_path, size, content_type
                            )})
                        }
                        Err(e) => {
                            session.record_failure("WebDownload", &e);
                            session.record_manifest("web_download", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": format!("Download failed: {}", e)})
                        }
                    }
                }
                Err(e) => {
                    session.record_failure("WebDownload", &e);
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("WebClient init failed: {}", e)})
                }
            }
        }

        // ====== spf_web_api ======
        "spf_web_api" => {
            let method = args["method"].as_str().unwrap_or("GET");
            let url = args["url"].as_str().unwrap_or("");
            let headers = args["headers"].as_str().unwrap_or("");
            let body = args["body"].as_str().unwrap_or("");

            session.record_action("WebAPI", "called", None);
            match WebClient::new() {
                Ok(client) => {
                    match client.api_request(method, url, headers, body) {
                        Ok((status, resp_headers, resp_body)) => {
                            session.record_manifest("web_api", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            let truncated = if resp_body.len() > 50000 { &resp_body[..50000] } else { &resp_body };
                            json!({"type": "text", "text": format!(
                                "API {} {} → HTTP {}\n\nHeaders:\n{}\n\nBody:\n{}",
                                method, url, status, resp_headers, truncated
                            )})
                        }
                        Err(e) => {
                            session.record_failure("WebAPI", &e);
                            session.record_manifest("web_api", gate_decision.complexity.c, "ALLOWED", None);
                            let _ = storage.save_session(session);
                            json!({"type": "text", "text": format!("API request failed: {}", e)})
                        }
                    }
                }
                Err(e) => {
                    session.record_failure("WebAPI", &e);
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("WebClient init failed: {}", e)})
                }
            }
        }




        // ====== WEB BROWSER TOOLS — Reverse Proxy Engine (WB-2e) ======

        "spf_web_connect" => {
            let port = args.get("port").and_then(|v| v.as_u64())
                .unwrap_or(http_port as u64) as u16;
            match browser.lock().unwrap().connect(port) {
                Ok((msg, channels)) => {
                    *ws_browser_channels.lock().unwrap() = Some(channels);
                    json!({"type": "text", "text": format!("{}\nProxy: http://localhost:{}/proxy?url=<url>\nWS: ws://localhost:{}/ws/browser", msg, port, port)})
                }
                Err(e) => json!({"type": "text", "text": format!("Connect failed: {}", e)}),
            }
        }

        "spf_web_navigate" => {
            let url = args.get("url").and_then(|v| v.as_str()).unwrap_or("");
            if url.is_empty() {
                return json!({"type": "text", "text": "url required"});
            }
            match browser.lock().unwrap().navigate(url) {
                Ok(msg) => json!({"type": "text", "text": msg}),
                Err(e) => json!({"type": "text", "text": format!("Navigate failed: {}", e)}),
            }
        }

        "spf_web_click" => {
            let selector = args.get("selector").and_then(|v| v.as_str()).unwrap_or("");
            if selector.is_empty() {
                return json!({"type": "text", "text": "selector required"});
            }
            match browser.lock().unwrap().click(selector) {
                Ok(msg) => json!({"type": "text", "text": msg}),
                Err(e) => json!({"type": "text", "text": format!("Click failed: {}", e)}),
            }
        }

        "spf_web_fill" => {
            let selector = args.get("selector").and_then(|v| v.as_str()).unwrap_or("");
            let text = args.get("text").and_then(|v| v.as_str()).unwrap_or("");
            if selector.is_empty() {
                return json!({"type": "text", "text": "selector required"});
            }
            match browser.lock().unwrap().fill(selector, text) {
                Ok(msg) => json!({"type": "text", "text": msg}),
                Err(e) => json!({"type": "text", "text": format!("Fill failed: {}", e)}),
            }
        }

        "spf_web_select" => {
            let selector = args.get("selector").and_then(|v| v.as_str()).unwrap_or("");
            if selector.is_empty() {
                return json!({"type": "text", "text": "selector required"});
            }
            match browser.lock().unwrap().select(selector) {
                Ok(elements) => {
                    let summary: Vec<String> = elements.iter().map(|e| {
                        format!("<{}{}{}> {}",
                            e.tag,
                            e.id.as_deref().map(|i| format!(" id={}", i)).unwrap_or_default(),
                            e.class.as_deref().map(|c| format!(" class={}", c)).unwrap_or_default(),
                            e.text.chars().take(80).collect::<String>())
                    }).collect();
                    json!({"type": "text", "text": format!("Found {} element(s):\n{}", elements.len(), summary.join("\n"))})
                }
                Err(e) => json!({"type": "text", "text": format!("Select failed: {}", e)}),
            }
        }

        "spf_web_eval" => {
            let expression = args.get("expression").and_then(|v| v.as_str()).unwrap_or("");
            if expression.is_empty() {
                return json!({"type": "text", "text": "expression required"});
            }
            match browser.lock().unwrap().eval(expression) {
                Ok(result) => json!({"type": "text", "text": result.to_string()}),
                Err(e) => json!({"type": "text", "text": format!("Eval failed: {}", e)}),
            }
        }

        "spf_web_screenshot" => {
            match browser.lock().unwrap().screenshot() {
                Ok(path) => json!({"type": "text", "text": format!("Screenshot saved: {}\nUse Read tool to view.", path)}),
                Err(e) => json!({"type": "text", "text": format!("Screenshot failed: {}", e)}),
            }
        }

        "spf_web_design" => {
            match browser.lock().unwrap().design() {
                Ok(brief) => {
                    let out = serde_json::to_string_pretty(&brief).unwrap_or_else(|_| format!("{:?}", brief));
                    json!({"type": "text", "text": out})
                }
                Err(e) => json!({"type": "text", "text": format!("Design brief failed: {}", e)}),
            }
        }

        "spf_web_page" => {
            match browser.lock().unwrap().page_info() {
                Ok(info) => json!({"type": "text", "text": info}),
                Err(e) => json!({"type": "text", "text": format!("Page info failed: {}", e)}),
            }
        }









        // ====== spf_notebook_edit ======
        "spf_notebook_edit" => {
            let notebook_path = args["notebook_path"].as_str().unwrap_or("");
            let new_source = args["new_source"].as_str().unwrap_or("");
            let cell_number = args["cell_number"].as_u64().unwrap_or(0) as usize;
            let cell_type = args["cell_type"].as_str().unwrap_or("code");
            let edit_mode = args["edit_mode"].as_str().unwrap_or("replace");

            // HARDCODE: Gate check — NO BYPASS
            let params = ToolParams {
                file_path: Some(notebook_path.to_string()),
                content: Some(new_source.to_string()),
                ..Default::default()
            };

            let decision = gate::process("spf_notebook_edit", &params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("NotebookEdit", decision.complexity.c, "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": format!("BLOCKED: {}", decision.errors.join(", ")), "_blocked": true});
            }

            session.record_action("NotebookEdit", "called", Some(notebook_path));

            // Read notebook JSON
            match std::fs::read_to_string(notebook_path) {
                Ok(content) => {
                    match serde_json::from_str::<Value>(&content) {
                        Ok(mut notebook) => {
                            if let Some(cells) = notebook.get_mut("cells").and_then(|c| c.as_array_mut()) {
                                match edit_mode {
                                    "replace" => {
                                        if cell_number < cells.len() {
                                            cells[cell_number]["source"] = json!([new_source]);
                                            cells[cell_number]["cell_type"] = json!(cell_type);
                                        } else {
                                            return json!({"type": "text", "text": format!("Cell {} not found", cell_number)});
                                        }
                                    }
                                    "insert" => {
                                        let new_cell = json!({
                                            "cell_type": cell_type,
                                            "source": [new_source],
                                            "metadata": {},
                                            "outputs": []
                                        });
                                        cells.insert(cell_number, new_cell);
                                    }
                                    "delete" => {
                                        if cell_number < cells.len() {
                                            cells.remove(cell_number);
                                        }
                                    }
                                    _ => return json!({"type": "text", "text": "Invalid edit_mode"})
                                }

                                // Write back
                                match std::fs::write(notebook_path, serde_json::to_string_pretty(&notebook).unwrap()) {
                                    Ok(()) => {
                                        session.track_write(notebook_path);
                                        let _ = storage.save_session(session);
                                        json!({"type": "text", "text": format!("Notebook edited: {} cell {} ({})", notebook_path, cell_number, edit_mode)})
                                    }
                                    Err(e) => {
                                        session.record_failure("NotebookEdit", &e.to_string());
                                        let _ = storage.save_session(session);
                                        json!({"type": "text", "text": format!("Write failed: {}", e)})
                                    }
                                }
                            } else {
                                json!({"type": "text", "text": "Invalid notebook: no cells array"})
                            }
                        }
                        Err(e) => json!({"type": "text", "text": format!("JSON parse error: {}", e)})
                    }
                }
                Err(e) => {
                    session.record_failure("NotebookEdit", &e.to_string());
                    let _ = storage.save_session(session);
                    json!({"type": "text", "text": format!("Read failed: {}", e)})
                }
            }
        }

        // ====== spf_brain_search ======
        "spf_brain_search" => {
            let query = args["query"].as_str().unwrap_or("");
            let collection = args["collection"].as_str().unwrap_or("default");
            let limit = args["limit"].as_u64().unwrap_or(5) as usize;

            session.record_action("brain_search", "called", None);
            let output = crate::brain_local::brain_search(query, collection, limit);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_store ======
        "spf_brain_store" => {
            let text = args["text"].as_str().unwrap_or("");
            let title = args["title"].as_str().unwrap_or("untitled");
            let collection = args["collection"].as_str().unwrap_or("default");

            session.record_action("brain_store", "called", None);
            let output = crate::brain_local::brain_store(text, title, collection);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_flint_store ======
        "spf_flint_store" => {
            let text = args["text"].as_str().unwrap_or("");
            let title = args["title"].as_str().unwrap_or("untitled");
            let collection = args["collection"].as_str().unwrap_or("default");
            let tags_str = args["tags"].as_str().unwrap_or("");

            session.record_action("flint_store", "called", None);

            // Strike 1: Brain store — vector storage for semantic search
            let brain_result = crate::brain_local::brain_store(text, title, collection);

            // Strike 2: Working memory — enables tiered promotion lifecycle
            let working_result = if let Some(ref db) = agent_db {
                let summary: String = text.chars().take(500).collect();
                let tags: Vec<String> = if tags_str.is_empty() {
                    vec![
                        "tool:spf_flint_store".to_string(),
                        "source:flint_store".to_string(),
                        format!("collection:{}", collection),
                    ]
                } else {
                    let mut t: Vec<String> = tags_str.split(',')
                        .map(|s| s.trim().to_string())
                        .filter(|s| !s.is_empty())
                        .collect();
                    t.push("tool:spf_flint_store".to_string());
                    t.push("source:flint_store".to_string());
                    t
                };
                match db.create_memory(&summary, crate::agent_state::MemoryType::Working, tags, "flint_store") {
                    Ok(id) => format!("Working memory created: {}", id),
                    Err(e) => format!("Working memory error: {}", e),
                }
            } else {
                "Agent state DB not available — brain-only store".to_string()
            };

            let _ = storage.save_session(session);
            json!({"type": "text", "text": format!("{}\n{}", brain_result, working_result)})
        }

        // ====== spf_brain_context ======
        "spf_brain_context" => {
            let query = args["query"].as_str().unwrap_or("");
            let max_tokens = args["max_tokens"].as_u64().unwrap_or(2000) as usize;

            session.record_action("brain_context", "called", None);
            let output = crate::brain_local::brain_context(query, "default", max_tokens);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_index ======
        "spf_brain_index" => {
            let path = args["path"].as_str().unwrap_or("");

            session.record_action("brain_index", "called", Some(path));
            let output = crate::brain_local::brain_index_path(path, "default");
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_list ======
        "spf_brain_list" => {
            session.record_action("brain_list", "called", None);
            let output = crate::brain_local::brain_list_collections();
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_status ======
        "spf_brain_status" => {
            session.record_action("brain_status", "called", None);
            let output = crate::brain_local::brain_status();
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_recall ======
        "spf_brain_recall" => {
            let query = args["query"].as_str().unwrap_or("");
            let collection = args["collection"].as_str().unwrap_or("default");

            session.record_action("brain_recall", "called", None);
            let output = crate::brain_local::brain_recall(query, collection);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_list_docs ======
        "spf_brain_list_docs" => {
            let collection = args["collection"].as_str().unwrap_or("default");

            session.record_action("brain_list_docs", "called", None);
            let output = crate::brain_local::brain_list_docs(collection);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_brain_get_doc ======
        "spf_brain_get_doc" => {
            let doc_id = args["doc_id"].as_str().unwrap_or("");
            let collection = args["collection"].as_str().unwrap_or("default");

            session.record_action("brain_get_doc", "called", None);
            let output = crate::brain_local::brain_get_doc(doc_id, collection);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== RAG COLLECTOR HANDLERS ======
        // RG-1: Python subprocess eliminated. Handlers redirect to brain_local (in-process).

        // ====== spf_rag_collect_web ======
        "spf_rag_collect_web" => {
            let topic = args["topic"].as_str().unwrap_or("");
            session.record_action("rag_collect_web", "called", None);
            let output = if topic.is_empty() {
                "collect_web requires a topic parameter. Use spf_web_search + spf_brain_store for manual collection.".to_string()
            } else {
                crate::brain_local::brain_search(topic, "default", 10)
            };
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_collect_file ======
        "spf_rag_collect_file" => {
            let path = args["path"].as_str().unwrap_or("");
            session.record_action("rag_collect_file", "called", Some(path));
            let collection = args["category"].as_str().unwrap_or("default");
            let output = crate::brain_local::brain_index_path(path, collection);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_collect_folder ======
        "spf_rag_collect_folder" => {
            let path = args["path"].as_str().unwrap_or("");
            session.record_action("rag_collect_folder", "called", Some(path));
            let output = crate::brain_local::brain_index_path(path, "default");
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_collect_drop ======
        "spf_rag_collect_drop" => {
            session.record_action("rag_collect_drop", "called", None);
            let drop_path = format!("{}/LIVE/RAG/DROP_HERE", crate::paths::spf_root().display());
            let output = crate::brain_local::brain_index_path(&drop_path, "default");
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_index_gathered ======
        "spf_rag_index_gathered" => {
            let category = args["category"].as_str().unwrap_or("default");
            session.record_action("rag_index_gathered", "called", None);
            let gathered_path = format!("{}/LIVE/RAG/GATHERED", crate::paths::spf_root().display());
            let output = crate::brain_local::brain_index_path(&gathered_path, category);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_dedupe ======
        "spf_rag_dedupe" => {
            let category = args["category"].as_str().unwrap_or("");
            session.record_action("rag_dedupe", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": format!("Dedupe not available in-process. Use spf_brain_search to find duplicates in collection '{}'.", category)})
        }

        // ====== spf_rag_status ======
        "spf_rag_status" => {
            session.record_action("rag_status", "called", None);
            let output = crate::brain_local::brain_status();
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_list_gathered ======
        "spf_rag_list_gathered" => {
            let category = args["category"].as_str().unwrap_or("default");
            session.record_action("rag_list_gathered", "called", None);
            let output = crate::brain_local::brain_list_docs(category);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_bandwidth_status ======
        "spf_rag_bandwidth_status" => {
            session.record_action("rag_bandwidth_status", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": "Bandwidth tracking removed — brain operates in-process. Use spf_brain_status for system info."})
        }

        // ====== spf_rag_fetch_url ======
        "spf_rag_fetch_url" => {
            let url = args["url"].as_str().unwrap_or("");

            session.record_action("rag_fetch_url", "called", None);
            // RG-1: Redirect to brain_store — caller should use spf_web_fetch first then store result
            let output = format!("Use spf_web_fetch to get content from '{}', then spf_brain_store to index it.", url);
            let success = true;
            let _ = storage.save_session(session);
            if success {
                json!({"type": "text", "text": output})
            } else {
                json!({"type": "text", "text": format!("RAG fetch-url failed: {}", output)})
            }
        }

        // ====== spf_rag_collect_rss ======
        "spf_rag_collect_rss" => {
            session.record_action("rag_collect_rss", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": "RSS collection deprecated. Use spf_web_fetch to fetch feed URLs, then spf_brain_store to index content."})
        }

        // ====== spf_rag_list_feeds ======
        "spf_rag_list_feeds" => {
            session.record_action("rag_list_feeds", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": "RSS feeds deprecated. Use spf_web_fetch for URL content, spf_brain_store to index."})
        }

        // ====== spf_rag_pending_searches ======
        "spf_rag_pending_searches" => {
            let collection = args["collection"].as_str().unwrap_or("default");
            session.record_action("rag_pending_searches", "called", None);
            let output = crate::brain_local::brain_search("pending", collection, 20);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_fulfill_search ======
        "spf_rag_fulfill_search" => {
            session.record_action("rag_fulfill_search", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": "SearchSeeker fulfillment deprecated. Brain handles search completeness automatically."})
        }

        // ====== spf_rag_smart_search ======
        "spf_rag_smart_search" => {
            let query = args["query"].as_str().unwrap_or("");
            let collection = args["collection"].as_str().unwrap_or("default");
            session.record_action("rag_smart_search", "called", None);
            let output = crate::brain_local::brain_search(query, collection, 10);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": output})
        }

        // ====== spf_rag_auto_fetch_gaps ======
        "spf_rag_auto_fetch_gaps" => {
            session.record_action("rag_auto_fetch_gaps", "called", None);
            let _ = storage.save_session(session);
            json!({"type": "text", "text": "Auto-fetch gaps deprecated. Use spf_brain_search to find gaps, spf_web_fetch + spf_brain_store to fill them."})
        }

        // ====== SPF_CONFIG HANDLERS ======
        // NOTE: spf_config_get and spf_config_set blocked - user-only via CLI
        "spf_config_get" | "spf_config_set" => {
            json!({"type": "text", "text": "BLOCKED: Config read/write is user-only (use CLI)"})
        }

        "spf_config_paths" => {

            session.record_action("config_paths", "list", None);
            let _ = storage.save_session(session);

            match config_db {
                Some(db) => match db.list_path_rules() {
                    Ok(rules) => {
                        let text = rules.iter()
                            .map(|(t, p)| format!("{}: {}", t, p))
                            .collect::<Vec<_>>()
                            .join("\n");
                        json!({"type": "text", "text": if text.is_empty() { "No path rules configured".to_string() } else { text }})
                    }
                    Err(e) => json!({"type": "text", "text": format!("list_path_rules failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "SPF_CONFIG LMDB not initialized"}),
            }
        }

        "spf_config_stats" => {

            session.record_action("config_stats", "get", None);
            let _ = storage.save_session(session);

            match config_db {
                Some(db) => match db.stats() {
                    Ok((config_count, paths_count, patterns_count)) => {
                        json!({"type": "text", "text": format!(
                            "SPF_CONFIG LMDB Stats:\n  Config entries: {}\n  Path rules: {}\n  Dangerous patterns: {}",
                            config_count, paths_count, patterns_count
                        )})
                    }
                    Err(e) => json!({"type": "text", "text": format!("config_stats failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "SPF_CONFIG LMDB not initialized"}),
            }
        }

        // ====== TMP_DB HANDLERS ======
        "spf_tmp_list" => {

            session.record_action("tmp_list", "list", None);
            let _ = storage.save_session(session);

            match tmp_db {
                Some(db) => match db.list_projects() {
                    Ok(projects) => {
                        let text = projects.iter()
                            .map(|p| format!("{}: {} | trust={:?} | reads={} writes={} | active={}",
                                p.name, p.path, p.trust_level,
                                p.total_reads, p.total_writes, p.is_active))
                            .collect::<Vec<_>>()
                            .join("\n");
                        json!({"type": "text", "text": if text.is_empty() { "No projects registered".to_string() } else { text }})
                    }
                    Err(e) => json!({"type": "text", "text": format!("list_projects failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "TMP_DB LMDB not initialized"}),
            }
        }

        "spf_tmp_stats" => {

            session.record_action("tmp_stats", "get", None);
            let _ = storage.save_session(session);

            match tmp_db {
                Some(db) => match db.db_stats() {
                    Ok((projects_count, access_count, resources_count)) => {
                        json!({"type": "text", "text": format!(
                            "TMP_DB LMDB Stats:\n  Registered projects: {}\n  Access log entries: {}\n  Resource records: {}",
                            projects_count, access_count, resources_count
                        )})
                    }
                    Err(e) => json!({"type": "text", "text": format!("tmp_stats failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "TMP_DB LMDB not initialized"}),
            }
        }

        "spf_tmp_get" => {
            let path_arg = args["path"].as_str().unwrap_or("");

            session.record_action("tmp_get", "get", Some(path_arg));
            let _ = storage.save_session(session);

            match tmp_db {
                Some(db) => match db.get_project(path_arg) {
                    Ok(Some(proj)) => {
                        json!({"type": "text", "text": format!(
                            "Project: {}\nPath: {}\nTrust: {:?}\nActive: {}\nReads: {} | Writes: {} | Session writes: {}/{}\nMax write size: {} | Total C: {}\nProtected: {:?}\nCreated: {} | Last accessed: {}\nNotes: {}",
                            proj.name, proj.path, proj.trust_level, proj.is_active,
                            proj.total_reads, proj.total_writes, proj.session_writes, proj.max_writes_per_session,
                            proj.max_write_size, proj.total_complexity,
                            proj.protected_paths,
                            format_timestamp(proj.created_at), format_timestamp(proj.last_accessed),
                            if proj.notes.is_empty() { "None" } else { &proj.notes }
                        )})
                    }
                    Ok(None) => json!({"type": "text", "text": format!("Project not found: {}", path_arg)}),
                    Err(e) => json!({"type": "text", "text": format!("get_project failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "TMP_DB LMDB not initialized"}),
            }
        }

        "spf_tmp_active" => {

            session.record_action("tmp_active", "get", None);
            let _ = storage.save_session(session);

            match tmp_db {
                Some(db) => match db.get_active() {
                    Ok(Some(path)) => {
                        // Also fetch project details
                        match db.get_project(&path) {
                            Ok(Some(proj)) => {
                                json!({"type": "text", "text": format!(
                                    "Active project: {} ({})\nTrust: {:?} | Reads: {} | Writes: {}",
                                    proj.name, proj.path, proj.trust_level, proj.total_reads, proj.total_writes
                                )})
                            }
                            _ => json!({"type": "text", "text": format!("Active project path: {} (details unavailable)", path)}),
                        }
                    }
                    Ok(None) => json!({"type": "text", "text": "No active project"}),
                    Err(e) => json!({"type": "text", "text": format!("get_active failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "TMP_DB LMDB not initialized"}),
            }
        }

        // ====== AGENT_STATE HANDLERS ======
        // BLOCKED: Write operations are user-only
        "spf_agent_remember" | "spf_agent_forget" | "spf_agent_set_state" => {
            json!({"type": "text", "text": "BLOCKED: Agent state writes are user-only (use CLI)"})
        }

        "spf_agent_stats" => {

            session.record_action("agent_stats", "get", None);
            let _ = storage.save_session(session);

            match agent_db {
                Some(db) => match db.db_stats() {
                    Ok((memory_count, sessions_count, state_count, tags_count)) => {
                        json!({"type": "text", "text": format!(
                            "AGENT_STATE LMDB Stats:\n  Memories: {}\n  Sessions: {}\n  State keys: {}\n  Tags: {}",
                            memory_count, sessions_count, state_count, tags_count
                        )})
                    }
                    Err(e) => json!({"type": "text", "text": format!("agent_stats failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
            }
        }

        "spf_agent_memory_search" => {
            let query = args["query"].as_str().unwrap_or("");
            let limit = args["limit"].as_u64().unwrap_or(10) as usize;

            session.record_action("agent_memory_search", "search", Some(query));
            let _ = storage.save_session(session);

            match agent_db {
                Some(db) => match db.search_memories(query, limit) {
                    Ok(memories) => {
                        if memories.is_empty() {
                            json!({"type": "text", "text": format!("No memories found for: {}", query)})
                        } else {
                            let text = memories.iter()
                                .map(|m| format!("[{}] {:?} | {}\n  Tags: {:?} | Created: {}",
                                    m.id, m.memory_type, m.content,
                                    m.tags, format_timestamp(m.created_at)))
                                .collect::<Vec<_>>()
                                .join("\n\n");
                            json!({"type": "text", "text": text})
                        }
                    }
                    Err(e) => json!({"type": "text", "text": format!("search_memories failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
            }
        }

        "spf_agent_memory_by_tag" => {
            let tag = args["tag"].as_str().unwrap_or("");

            session.record_action("agent_memory_by_tag", "search", Some(tag));
            let _ = storage.save_session(session);

            match agent_db {
                Some(db) => match db.get_by_tag(tag) {
                    Ok(memories) => {
                        if memories.is_empty() {
                            json!({"type": "text", "text": format!("No memories with tag: {}", tag)})
                        } else {
                            let text = memories.iter()
                                .map(|m| format!("[{}] {:?} | {}",
                                    m.id, m.memory_type, m.content))
                                .collect::<Vec<_>>()
                                .join("\n");
                            json!({"type": "text", "text": text})
                        }
                    }
                    Err(e) => json!({"type": "text", "text": format!("get_by_tag failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
            }
        }

        "spf_agent_session_info" => {

            session.record_action("agent_session_info", "get", None);
            let _ = storage.save_session(session);

            match agent_db {
                Some(db) => match db.get_latest_session() {
                    Ok(Some(sess)) => {
                        json!({"type": "text", "text": format!(
                            "Session: {}\nParent: {}\nStarted: {} | Ended: {}\nWorking dir: {}\nProject: {}\nFiles modified: {}\nComplexity: {} | Actions: {}\nSummary: {}",
                            sess.session_id,
                            sess.parent_session.as_deref().unwrap_or("None"),
                            format_timestamp(sess.started_at),
                            if sess.ended_at == 0 { "Ongoing".to_string() } else { format_timestamp(sess.ended_at) },
                            sess.working_dir,
                            sess.active_project.as_deref().unwrap_or("None"),
                            sess.files_modified.len(),
                            sess.total_complexity, sess.total_actions,
                            if sess.summary.is_empty() { "None" } else { &sess.summary }
                        )})
                    }
                    Ok(None) => json!({"type": "text", "text": "No sessions recorded"}),
                    Err(e) => json!({"type": "text", "text": format!("get_latest_session failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
            }
        }

        "spf_agent_context" => {

            session.record_action("agent_context", "get", None);
            let _ = storage.save_session(session);

            match agent_db {
                Some(db) => match db.get_context_summary() {
                    Ok(summary) => {
                        json!({"type": "text", "text": if summary.is_empty() { "No context available".to_string() } else { summary }})
                    }
                    Err(e) => json!({"type": "text", "text": format!("get_context_summary failed: {}", e)}),
                },
                None => json!({"type": "text", "text": "AGENT_STATE LMDB not initialized"}),
            }
        }

        // ====== SPF_FS (LMDB 1) Handlers ======
        "spf_fs_exists" => {
            let path = args["path"].as_str().unwrap_or("/");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_exists", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_exists", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_exists", "check", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "exists", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_stat" => {
            let path = args["path"].as_str().unwrap_or("/");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_stat", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_stat", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_stat", "get", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "stat", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_ls" => {
            let path = args["path"].as_str().unwrap_or("/");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_ls", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_ls", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_ls", "list", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "ls", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_read" => {
            let path = args["path"].as_str().unwrap_or("");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_read", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_read", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_read", "read", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "read", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_write" => {
            let path = args["path"].as_str().unwrap_or("");
            let content = args["content"].as_str().unwrap_or("");

            let gate_params = ToolParams { file_path: Some(path.to_string()), content: Some(content.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_write", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_write", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_write", "write", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "write", Some(content), config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_mkdir" => {
            let path = args["path"].as_str().unwrap_or("");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_mkdir", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_mkdir", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_mkdir", "create", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "mkdir", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_rm" => {
            let path = args["path"].as_str().unwrap_or("");

            let gate_params = ToolParams { file_path: Some(path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_rm", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_rm", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_rm", "remove", Some(path));
            let _ = storage.save_session(session);

            if let Some(result) = route_to_lmdb(path, "rm", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: path {} not routable — no LMDB fallback", path)})
        }

        "spf_fs_rename" => {
            let old_path = args["old_path"].as_str().unwrap_or("");
            let new_path = args["new_path"].as_str().unwrap_or("");

            let gate_params = ToolParams { file_path: Some(old_path.to_string()), ..Default::default() };
            let decision = gate::process("spf_fs_rename", &gate_params, config, session, &source);
            if !decision.allowed {
                session.record_manifest("spf_fs_rename", decision.complexity.c,
                    "BLOCKED",
                    decision.errors.first().map(|s| s.as_str()));
                let _ = storage.save_session(session);
                return json!({"type": "text", "text": decision.message, "_blocked": true});
            }
            session.record_action("fs_rename", "rename", Some(old_path));
            let _ = storage.save_session(session);

            // Device-backed directory rename (handle before route_to_lmdb)
            let is_device_rename = old_path.starts_with("/tmp/") || old_path.starts_with("/projects/");
            if is_device_rename {
                // Path traversal protection
                if old_path.contains("..") || new_path.contains("..") {
                    return json!({"type": "text", "text": "BLOCKED: path traversal detected in rename paths"});
                }
                let live_base = spf_root().join("LIVE").display().to_string();
                let resolve = |vpath: &str| -> std::path::PathBuf {
                    if vpath.starts_with("/tmp/") {
                        std::path::PathBuf::from(format!("{}/TMP/TMP", live_base))
                            .join(vpath.strip_prefix("/tmp/").unwrap_or(""))
                    } else {
                        std::path::PathBuf::from(format!("{}/PROJECTS/PROJECTS", live_base))
                            .join(vpath.strip_prefix("/projects/").unwrap_or(""))
                    }
                };
                let old_device = resolve(old_path);
                let new_device = resolve(new_path);
                if let Some(parent) = new_device.parent() {
                    let _ = std::fs::create_dir_all(parent);
                }
                return match std::fs::rename(&old_device, &new_device) {
                    Ok(()) => json!({"type": "text", "text": format!("Renamed: {} -> {}", old_path, new_path)}),
                    Err(e) => json!({"type": "text", "text": format!("rename failed: {}", e)}),
                };
            }
            if let Some(result) = route_to_lmdb(old_path, "rename", None, config_db, tmp_db, agent_db) {
                return result;
            }
            json!({"type": "text", "text": format!("BLOCKED: paths {}, {} not routable — no LMDB fallback", old_path, new_path)})
        }

        // ================================================================
        // MESH TOOLS — Agent mesh status, peers, and cross-agent calls
        // ================================================================

        "spf_mesh_status" => {
            session.record_action("mesh", "status", None);
            let _ = storage.save_session(session);

            let mesh_json = crate::paths::spf_root().join("LIVE/CONFIG/mesh.json");
            let mesh_cfg = crate::config::MeshConfig::load(&mesh_json).unwrap_or_default();
            let status = if mesh_cfg.enabled { "online" } else { "disabled" };

            // P5: Include tracked peers with roles
            let peers_info = tracked_peers.lock().unwrap();
            let peer_count = peers_info.len();
            let lines: Vec<String> = if peers_info.is_empty() {
                vec!["  (no tracked peers)".to_string()]
            } else {
                peers_info.iter().map(|(k, v)| {
                    format!("  {} | role={} name={} last_seen={}s ago",
                        &k[..16.min(k.len())],
                        v.role,
                        v.name,
                        v.last_seen.elapsed().as_secs())
                }).collect()
            };
            drop(peers_info);

            // P5: Include orchestrator summary if available
            let orch_info = orchestrator_state.lock().unwrap();
            let orch_text = match orch_info.as_ref() {
                Some(orch_arc) => {
                    let orch = orch_arc.lock().unwrap();
                    format!("\nOrchestrator: {}", orch.summary())
                }
                None => String::new(),
            };
            drop(orch_info);

            json!({"type": "text", "text": format!(
                "Mesh: {} | Role: {} | Team: {} | Discovery: {} | Identity: {}\nTracked peers ({}):{}\n{}",
                status, mesh_cfg.role, mesh_cfg.team,
                mesh_cfg.discovery, pub_key_hex,
                peer_count,
                lines.join("\n"),
                orch_text
            )})
        }

        "spf_mesh_peers" => {
            session.record_action("mesh", "peers", None);
            let _ = storage.save_session(session);

            let cfg_dir = crate::paths::spf_root().join("LIVE/CONFIG");
            let trusted = crate::identity::load_trusted_keys(&cfg_dir.join("groups"));
            let mut lines = Vec::new();
            for key in &trusted {
                if let Some(info) = peers.get(key.as_str()) {
                    let addrs = if info.addr.is_empty() { "no addrs".to_string() } else { info.addr.join(", ") };
                    lines.push(format!("  {} ({}, {}, {})", key, info.name, info.role, addrs));
                } else {
                    lines.push(format!("  {} (trusted, no config)", key));
                }
            }
            let count = lines.len();
            let list = if lines.is_empty() {
                "No trusted peers. Add pubkeys to LIVE/CONFIG/groups/*.keys".to_string()
            } else {
                lines.join("\n")
            };
            json!({"type": "text", "text": format!("Mesh Peers ({}):\n{}", count, list)})
        }

        "spf_mesh_call" => {
            session.record_action("mesh", "call", None);
            let _ = storage.save_session(session);

            let peer_key = args["peer_key"].as_str().unwrap_or("");
            let tool_name = args["tool"].as_str().unwrap_or("");
            let tool_args = args.get("arguments").cloned().unwrap_or(json!({}));

            if peer_key.is_empty() || tool_name.is_empty() {
                json!({"type": "text", "text": "ERROR: peer_key and tool are required"})
            } else {
                let cfg_dir = crate::paths::spf_root().join("LIVE/CONFIG");
                let trusted = crate::identity::load_trusted_keys(&cfg_dir.join("groups"));
                if !trusted.contains(peer_key) {
                    json!({"type": "text", "text": format!("BLOCKED: peer not trusted"), "_blocked": true})
                } else if let Some(mesh_tx) = mesh_tx {
                    // Hot-reload peer addresses from disk (same pattern as trust keys above)
                    let live_peers = crate::identity::load_peers(&cfg_dir.join("groups"));
                    let addrs = live_peers.get(peer_key)
                        .map(|p| p.addr.clone())
                        .unwrap_or_default();
                    let (reply_tx, reply_rx) = std::sync::mpsc::channel();
                    let request = crate::mesh::MeshRequest {
                        peer_key: peer_key.to_string(),
                        addrs,
                        tool: tool_name.to_string(),
                        args: tool_args,
                        reply: reply_tx,
                    };
                    if mesh_tx.send(request).is_ok() {
                        match reply_rx.recv_timeout(std::time::Duration::from_secs(30)) {
                            Ok(Ok(result)) => {
                                let text = result.get("result")
                                    .and_then(|r| r.get("content"))
                                    .and_then(|c| c.get(0))
                                    .and_then(|t| t.get("text"))
                                    .and_then(|t| t.as_str())
                                    .unwrap_or("(no text in response)");
                                json!({"type": "text", "text": text})
                            }
                            Ok(Err(e)) => json!({"type": "text", "text": format!("MESH ERROR: {}", e)}),
                            Err(_) => json!({"type": "text", "text": "MESH ERROR: call timed out (30s)"}),
                        }
                    } else {
                        json!({"type": "text", "text": "MESH ERROR: mesh channel closed"})
                    }
                } else {
                    json!({"type": "text", "text": "MESH ERROR: mesh not enabled"})
                }
            }
        }

        // ====== TRANSFORMER TOOLS (Block K) ======

        "spf_transformer_status" => {
            session.record_action("spf_transformer_status", "called", None);
            crate::transformer_tools::handle_status(transformer, transformer_config)
        }

        "spf_transformer_infer" => {
            session.record_action("spf_transformer_infer", "called", None);
            let tokenizer_path = crate::paths::spf_root().join("LIVE/MODELS/tokenizer.json");
            crate::transformer_tools::handle_infer(transformer, args, transformer_config, &tokenizer_path.to_string_lossy())
        }

        "spf_transformer_chat" => {
            session.record_action("spf_transformer_chat", "called", None);
            let tokenizer_path = crate::paths::spf_root().join("LIVE/MODELS/tokenizer.json");
            crate::transformer_tools::handle_chat(transformer, args, transformer_config, &tokenizer_path.to_string_lossy())
        }

        "spf_transformer_train" => {
            session.record_action("spf_transformer_train", "called", None);
            crate::transformer_tools::handle_train(transformer, args, transformer_config)
        }

        "spf_transformer_metrics" => {
            session.record_action("spf_transformer_metrics", "called", None);
            crate::transformer_tools::handle_metrics(transformer, transformer_config)
        }

        // FL-8: Evil/Good training input tools
        "spf_flint_train_evil" => {
            session.record_action("spf_flint_train_evil", "called", None);
            crate::transformer_tools::handle_train_evil(args)
        }

        "spf_flint_train_good" => {
            session.record_action("spf_flint_train_good", "called", None);
            crate::transformer_tools::handle_train_good(args)
        }

        // ====== CHAT TOOLS (Block GG) ======

        "spf_chat_send" => {
            session.record_action("spf_chat_send", "called", None);

            let peer = args["peer_key"].as_str().unwrap_or("");
            let text = args["text"].as_str().unwrap_or("");
            if peer.is_empty() || text.is_empty() {
                return json!({"type": "text", "text": "Error: peer_key and text required"});
            }

            let peer_short = &peer[..8.min(peer.len())];
            let local_short = &pub_key_hex[..8.min(pub_key_hex.len())];

            // Deterministic conversation ID: sorted short keys
            let conv_id = args.get("conversation_id")
                .and_then(|v| v.as_str())
                .map(|s| s.to_string())
                .unwrap_or_else(|| {
                    let mut parts = vec![local_short, peer_short];
                    parts.sort();
                    format!("dm_{}_{}", parts[0], parts[1])
                });

            let ts = chrono::Utc::now().to_rfc3339();

            // Store locally in ChatEngine
            let mut chat_lock = CHAT_ENGINE.lock().unwrap_or_else(|e| e.into_inner());
            let engine = chat_lock.get_or_insert_with(|| {
                crate::chat::ChatEngine::new(local_short.to_string())
            });

            let mut msg = engine.create_message(peer_short, text, &conv_id, &ts);
            msg.msg_type = crate::chat::MessageType::UserText;
            engine.receive_message(msg.clone());
            drop(chat_lock); // Release lock before mesh I/O

            // Send via mesh as tool call to peer
            if let Some(ref tx) = mesh_tx {
                let addrs: Vec<String> = peers.get(peer)
                    .map(|p| p.addr.clone())
                    .unwrap_or_default();
                let (reply_tx, reply_rx) = std::sync::mpsc::channel();
                let request = crate::mesh::MeshRequest {
                    peer_key: peer.to_string(),
                    addrs,
                    tool: "spf_chat_receive".to_string(),
                    args: serde_json::to_value(&msg).unwrap_or(json!({})),
                    reply: reply_tx,
                };
                if tx.send(request).is_ok() {
                    match reply_rx.recv_timeout(std::time::Duration::from_secs(10)) {
                        Ok(Ok(resp)) => {
                            let ack = resp.get("result")
                                .and_then(|r| r.get("content"))
                                .and_then(|c| c.get(0))
                                .and_then(|t| t.get("text"))
                                .and_then(|t| t.as_str())
                                .unwrap_or("delivered");
                            json!({"type": "text", "text": format!(
                                "Sent to {}: {}\nDelivery: {}", peer_short, text, ack
                            )})
                        }
                        Ok(Err(e)) => json!({"type": "text", "text": format!(
                            "Stored locally. Mesh delivery failed: {}", e
                        )}),
                        Err(_) => json!({"type": "text", "text": format!(
                            "Stored locally. Peer {} may be offline (timeout)", peer_short
                        )}),
                    }
                } else {
                    json!({"type": "text", "text": "Stored locally. Mesh channel closed."})
                }
            } else {
                json!({"type": "text", "text": "Stored locally. Mesh not enabled."})
            }
        }

        "spf_chat_receive" => {
            session.record_action("spf_chat_receive", "called", None);

            // Parse ChatMessage from args
            let msg: crate::chat::ChatMessage = match serde_json::from_value(args.clone()) {
                Ok(m) => m,
                Err(e) => return json!({"type": "text", "text": format!("Invalid chat message: {}", e)}),
            };

            let local_short = &pub_key_hex[..8.min(pub_key_hex.len())];
            let mut chat_lock = CHAT_ENGINE.lock().unwrap_or_else(|e| e.into_inner());
            let engine = chat_lock.get_or_insert_with(|| {
                crate::chat::ChatEngine::new(local_short.to_string())
            });

            let from = msg.from.clone();
            let text_preview = msg.text.chars().take(50).collect::<String>();
            let conv_id = engine.receive_message(msg);
            eprintln!("[SPF-CHAT] Received from {}: {} (conv: {})", from, text_preview, conv_id);

            json!({"type": "text", "text": format!("received:{}:{}",  from, conv_id)})
        }

        "spf_chat_history" => {
            session.record_action("spf_chat_history", "called", None);

            let conv_id = args.get("conversation_id").and_then(|v| v.as_str()).unwrap_or("");
            let limit = args.get("limit").and_then(|v| v.as_u64()).unwrap_or(20) as usize;

            let chat_lock = CHAT_ENGINE.lock().unwrap_or_else(|e| e.into_inner());
            match chat_lock.as_ref() {
                Some(engine) => {
                    if conv_id.is_empty() {
                        let convos = engine.list_conversations();
                        if convos.is_empty() {
                            json!({"type": "text", "text": "No conversations"})
                        } else {
                            let text = convos.iter().map(|c| format!(
                                "  {} — {} ({} msgs, last: {})",
                                c.id, c.name, c.message_count, c.last_activity
                            )).collect::<Vec<_>>().join("\n");
                            json!({"type": "text", "text": format!("Conversations:\n{}", text)})
                        }
                    } else {
                        let history = engine.get_history(conv_id, limit);
                        if history.is_empty() {
                            json!({"type": "text", "text": format!("No messages in {}", conv_id)})
                        } else {
                            let text = history.iter().map(|m| format!(
                                "[{}] {}: {}", m.timestamp, m.from, m.text
                            )).collect::<Vec<_>>().join("\n");
                            json!({"type": "text", "text": text})
                        }
                    }
                }
                None => json!({"type": "text", "text": "No chat history. Send or receive a message first."}),
            }
        }

        "spf_chat_rooms" => {
            session.record_action("spf_chat_rooms", "called", None);

            let chat_lock = CHAT_ENGINE.lock().unwrap_or_else(|e| e.into_inner());
            match chat_lock.as_ref() {
                Some(engine) => {
                    let convos = engine.list_conversations();
                    if convos.is_empty() {
                        json!({"type": "text", "text": "No active conversations"})
                    } else {
                        let text = serde_json::to_string_pretty(&convos).unwrap_or_default();
                        json!({"type": "text", "text": text})
                    }
                }
                None => json!({"type": "text", "text": "No active conversations"}),
            }
        }

        // ====== VOICE MODE (Block DD) ======
        "spf_voice_mode" => {
            session.record_action("spf_voice_mode", "called", None);

            let action = args["action"].as_str().unwrap_or("status");

            // Auto-open persistent voice pipeline for audio-requiring actions.
            // Pipeline stays open until explicit "stop". Idempotent — safe to call repeatedly.
            match action {
                "speak" | "listen" | "stream_on" | "call" | "start" => {
                    if let Err(e) = spf_voice::open() {
                        eprintln!("[SPF-VOICE] Pipeline auto-open failed: {}", e);
                    }
                }
                _ => {}
            }

            let mut voice_lock = crate::voice::VOICE_SESSION.lock().unwrap_or_else(|e| e.into_inner());

            match action {
                "start" => {
                    if voice_lock.as_ref().map_or(false, |s| s.is_active()) {
                        let stats = voice_lock.as_ref().unwrap().stats();
                        return json!({"type": "text", "text": format!(
                            "Voice session already active\n{}",
                            serde_json::to_string_pretty(&stats).unwrap_or_default()
                        )});
                    }
                    let mut vconfig = crate::voice::VoiceConfig::default();
                    if let Some(sr) = args.get("sample_rate").and_then(|v| v.as_u64()) {
                        vconfig.sample_rate = sr as u32;
                    }
                    let mut vs = crate::voice::VoiceSession::new(vconfig);
                    match vs.start() {
                        Ok(()) => {
                            let status_json = vs.status().to_json_value();
                            *voice_lock = Some(vs);
                            json!({"type": "text", "text": format!(
                                "Voice session started\n{}",
                                serde_json::to_string_pretty(&status_json).unwrap_or_default()
                            )})
                        }
                        Err(e) => {
                            json!({"type": "text", "text": format!("Voice start failed: {}", e)})
                        }
                    }
                }
                "stop" => {
                    if let Some(ref mut vs) = *voice_lock {
                        vs.stop(); // calls spf_voice::close() internally
                    } else {
                        // No session but pipeline may be open (Light mode auto-open)
                        spf_voice::close();
                    }
                    *voice_lock = None;
                    json!({"type": "text", "text": "Voice pipeline closed, session stopped"})
                }
                "status" => {
                    match voice_lock.as_ref() {
                        Some(vs) => {
                            let stats = vs.stats();
                            json!({"type": "text", "text": serde_json::to_string_pretty(&stats).unwrap_or_default()})
                        }
                        None => {
                            let status = crate::voice::VoiceStatus::from_stubs();
                            json!({"type": "text", "text": format!(
                                "Voice session inactive\n{}",
                                serde_json::to_string_pretty(&status.to_json_value()).unwrap_or_default()
                            )})
                        }
                    }
                }
                "speak" => {
                    let text = args.get("text").and_then(|v| v.as_str()).unwrap_or("");
                    if text.is_empty() {
                        return json!({"type": "text", "text": "Error: 'text' parameter required for speak action"});
                    }
                    // Block MM: Check voice mode — Light (spf-voice in-process TTS) or Rich (full session + Piper)
                    let tts_mode = {
                        let settings = crate::voice::VOICE_SETTINGS.lock().unwrap_or_else(|e| e.into_inner());
                        settings.agent_tts_mode.clone()
                    };
                    match tts_mode {
                        crate::voice::VoiceMode::Light => {
                            // Light mode: in-process TTS via spf-voice (espeak-ng FFI) — zero session, zero battery
                            match spf_voice::speak(text) {
                                Ok(()) => json!({"type": "text", "text": format!(
                                    "Spoke (light/spf-voice): \"{}\" ({} chars)", text, text.len()
                                )}),
                                Err(e) => json!({"type": "text", "text": format!(
                                    "spf-voice speak failed: {}", e
                                )})
                            }
                        }
                        crate::voice::VoiceMode::Rich => {
                            // Rich mode: Full VoiceSession (spf-voice audio + Piper ONNX TTS if available)
                            let needs_start = voice_lock.as_ref().map_or(true, |s| !s.is_active());
                            if needs_start {
                                let mut vs = crate::voice::VoiceSession::new(crate::voice::VoiceConfig::default());
                                match vs.start() {
                                    Ok(()) => {
                                        eprintln!("[SPF-VOICE] Auto-started session for speak (rich mode)");
                                        *voice_lock = Some(vs);
                                    }
                                    Err(e) => {
                                        return json!({"type": "text", "text": format!(
                                            "Voice start failed (rich mode): {}", e)});
                                    }
                                }
                            }
                            let vs = voice_lock.as_mut().unwrap();
                            match vs.speak(text) {
                                Ok(frames) => {
                                    let frame_count = frames.len();
                                    let total_bytes: usize = frames.iter().map(|f| f.data.len()).sum();
                                    let codec = frames.first().map(|f| f.codec.as_str()).unwrap_or("none").to_string();
                                    let mut play_ok = 0usize;
                                    let mut play_err = 0usize;
                                    for frame in &frames {
                                        match vs.play_frame(frame) {
                                            Ok(()) => play_ok += 1,
                                            Err(_) => play_err += 1,
                                        }
                                    }
                                    json!({"type": "text", "text": format!(
                                        "Spoke (rich/piper): {} frames ({} bytes, codec={}) | Played: {} ok, {} failed",
                                        frame_count, total_bytes, codec, play_ok, play_err
                                    )})
                                }
                                Err(e) => json!({"type": "text", "text": format!("TTS error (rich mode): {}", e)})
                            }
                        }
                    }
                }
                "call" => {
                    // Block MM: Start peer voice call via mesh
                    let peer_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("");
                    if peer_key.is_empty() {
                        return json!({"type": "text", "text": "Error: 'peer_key' parameter required for call action"});
                    }
                    // Check not already in a call
                    {
                        let call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(ref cs) = *call_state {
                            if cs.is_in_progress() {
                                let phase_str = if cs.is_ringing() { "ringing" } else { "active" };
                                return json!({"type": "text", "text": format!(
                                    "Already in call with peer {} ({}). Use end_call first.",
                                    &cs.peer_key[..8.min(cs.peer_key.len())], phase_str
                                )});
                            }
                        }
                    }
                    // Start voice session if not active
                    let needs_start = voice_lock.as_ref().map_or(true, |s| !s.is_active());
                    if needs_start {
                        let mut vs = crate::voice::VoiceSession::new(crate::voice::VoiceConfig::default());
                        match vs.start() {
                            Ok(()) => {
                                eprintln!("[SPF-VOICE] Started session for peer call to {}", &peer_key[..8.min(peer_key.len())]);
                                *voice_lock = Some(vs);
                            }
                            Err(e) => {
                                return json!({"type": "text", "text": format!(
                                    "Voice session start failed for call: {}", e)});
                            }
                        }
                    }
                    // Store call state
                    let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                    *call_state = Some(crate::voice::CallState {
                        peer_key: peer_key.to_string(),
                        peer_name: peer_key[..8.min(peer_key.len())].to_string(),
                        direction: crate::voice::CallDirection::Outgoing,
                        phase: crate::voice::CallPhase::Ringing,
                        started_at: std::time::Instant::now(),
                    });
                    // Signal peer via mesh: incoming_ring
                    if let Some(ref tx) = mesh_tx {
                        let addrs: Vec<String> = peers.get(peer_key)
                            .map(|p| p.addr.clone())
                            .unwrap_or_default();
                        let (reply_tx, _) = std::sync::mpsc::channel();
                        let _ = tx.send(crate::mesh::MeshRequest {
                            peer_key: peer_key.to_string(),
                            addrs,
                            tool: "spf_voice_mode".to_string(),
                            args: json!({"action": "incoming_ring", "peer_key": pub_key_hex}),
                            reply: reply_tx,
                        });
                    }
                    let peer_short = &peer_key[..8.min(peer_key.len())];
                    json!({"type": "text", "text": format!(
                        "Calling {}... ring sent. Use end_call to hang up.", peer_short
                    )})
                }
                "end_call" => {
                    // Block MM: End peer voice call
                    let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                    match call_state.take() {
                        Some(cs) if cs.is_in_progress() => {
                            // Signal peer: voice_end
                            if let Some(ref tx) = mesh_tx {
                                let addrs: Vec<String> = peers.get(&cs.peer_key)
                                    .map(|p| p.addr.clone())
                                    .unwrap_or_default();
                                let (reply_tx, _) = std::sync::mpsc::channel();
                                let _ = tx.send(crate::mesh::MeshRequest {
                                    peer_key: cs.peer_key.clone(),
                                    addrs,
                                    tool: "spf_voice_mode".to_string(),
                                    args: json!({"action": "voice_end", "peer_key": pub_key_hex}),
                                    reply: reply_tx,
                                });
                            }
                            let secs = cs.elapsed_secs();
                            let mins = secs / 60;
                            let remaining_secs = secs % 60;
                            // Stop voice session
                            if let Some(ref mut vs) = *voice_lock {
                                vs.stop();
                            }
                            *voice_lock = None;
                            let peer_short = &cs.peer_key[..8.min(cs.peer_key.len())];
                            json!({"type": "text", "text": format!(
                                "Call ended with {}. Duration: {}m {}s", peer_short, mins, remaining_secs
                            )})
                        }
                        _ => {
                            json!({"type": "text", "text": "No active call to end."})
                        }
                    }
                }
                "settings" => {
                    // Block MM: Read/write VoiceSettings
                    let has_updates = args.get("agent_tts_mode").is_some()
                        || args.get("agent_stt_mode").is_some()
                        || args.get("peer_quality").is_some()
                        || args.get("auto_accept_calls").is_some()
                        || args.get("idle_timeout_secs").is_some();
                    if has_updates {
                        let mut settings = crate::voice::VOICE_SETTINGS.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(mode) = args.get("agent_tts_mode").and_then(|v| v.as_str()) {
                            settings.agent_tts_mode = match mode {
                                "rich" | "Rich" => crate::voice::VoiceMode::Rich,
                                _ => crate::voice::VoiceMode::Light,
                            };
                        }
                        if let Some(mode) = args.get("agent_stt_mode").and_then(|v| v.as_str()) {
                            settings.agent_stt_mode = match mode {
                                "rich" | "Rich" => crate::voice::VoiceMode::Rich,
                                _ => crate::voice::VoiceMode::Light,
                            };
                        }
                        if let Some(mode) = args.get("peer_quality").and_then(|v| v.as_str()) {
                            settings.peer_quality = match mode {
                                "rich" | "Rich" => crate::voice::VoiceMode::Rich,
                                _ => crate::voice::VoiceMode::Light,
                            };
                        }
                        if let Some(val) = args.get("auto_accept_calls").and_then(|v| v.as_bool()) {
                            settings.auto_accept_calls = val;
                        }
                        if let Some(val) = args.get("idle_timeout_secs").and_then(|v| v.as_u64()) {
                            settings.idle_timeout_secs = val as u32;
                        }
                        let settings_json = serde_json::to_string_pretty(&*settings).unwrap_or_default();
                        json!({"type": "text", "text": format!("Voice settings updated:\n{}", settings_json)})
                    } else {
                        // Read-only: show current settings + call status
                        let settings = crate::voice::VOICE_SETTINGS.lock().unwrap_or_else(|e| e.into_inner());
                        let settings_json = serde_json::to_string_pretty(&*settings).unwrap_or_default();
                        let call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        let call_info = match &*call_state {
                            Some(cs) if cs.is_in_progress() => {
                                let dir = if cs.direction == crate::voice::CallDirection::Incoming { "Incoming" } else { "Outgoing" };
                                let phase = if cs.is_ringing() { "ringing" } else { "active" };
                                format!("{} call: peer={} phase={} duration={}s",
                                    dir, &cs.peer_key[..8.min(cs.peer_key.len())], phase, cs.elapsed_secs())
                            },
                            _ => "No active call".to_string(),
                        };
                        json!({"type": "text", "text": format!(
                            "Voice settings:\n{}\n\nCall status: {}", settings_json, call_info
                        )})
                    }
                }
                "incoming_ring" => {
                    // Peer is calling us — store incoming call state
                    let caller_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("").to_string();
                    if caller_key.is_empty() {
                        return json!({"type": "text", "text": "Error: incoming_ring missing peer_key"});
                    }
                    {
                        let call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(ref cs) = *call_state {
                            if cs.is_in_progress() {
                                eprintln!("[SPF-VOICE] Busy: incoming ring from {} while in call", &caller_key[..8.min(caller_key.len())]);
                                return json!({"type": "text", "text": "busy"});
                            }
                        }
                    }
                    let auto_accept = {
                        let settings = crate::voice::VOICE_SETTINGS.lock().unwrap_or_else(|e| e.into_inner());
                        settings.auto_accept_calls
                    };
                    {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        *call_state = Some(crate::voice::CallState {
                            peer_key: caller_key.clone(),
                            peer_name: caller_key[..8.min(caller_key.len())].to_string(),
                            direction: crate::voice::CallDirection::Incoming,
                            phase: if auto_accept { crate::voice::CallPhase::Active } else { crate::voice::CallPhase::Ringing },
                            started_at: std::time::Instant::now(),
                        });
                    }
                    if auto_accept {
                        // Start voice session
                        if voice_lock.as_ref().map_or(true, |s| !s.is_active()) {
                            let mut vs = crate::voice::VoiceSession::new(crate::voice::VoiceConfig::default());
                            if vs.start().is_ok() { *voice_lock = Some(vs); }
                        }
                        // Signal back: accepted
                        if let Some(ref tx) = mesh_tx {
                            let addrs: Vec<String> = peers.get(&caller_key)
                                .map(|p| p.addr.clone())
                                .unwrap_or_default();
                            let (reply_tx, _) = std::sync::mpsc::channel();
                            let _ = tx.send(crate::mesh::MeshRequest {
                                peer_key: caller_key.clone(),
                                addrs,
                                tool: "spf_voice_mode".to_string(),
                                args: json!({"action": "voice_accepted", "peer_key": pub_key_hex}),
                                reply: reply_tx,
                            });
                        }
                        eprintln!("[SPF-VOICE] Auto-accepted call from {}", &caller_key[..8.min(caller_key.len())]);
                        json!({"type": "text", "text": format!(
                            "Auto-accepted call from {}. Voice session active.",
                            &caller_key[..8.min(caller_key.len())]
                        )})
                    } else {
                        eprintln!("[SPF-VOICE] Incoming ring from {} — awaiting decision", &caller_key[..8.min(caller_key.len())]);
                        json!({"type": "text", "text": format!(
                            "Incoming call from {}. Use spf_voice_call action=accept or reject.",
                            &caller_key[..8.min(caller_key.len())]
                        )})
                    }
                }
                "voice_accepted" => {
                    // Peer accepted our outgoing call — activate it
                    let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                    match &mut *call_state {
                        Some(cs) if cs.is_ringing() && cs.direction == crate::voice::CallDirection::Outgoing => {
                            cs.phase = crate::voice::CallPhase::Active;
                            let peer_short = cs.peer_key[..8.min(cs.peer_key.len())].to_string();
                            eprintln!("[SPF-VOICE] Call accepted by {}", peer_short);
                            json!({"type": "text", "text": format!("Call connected with {}", peer_short)})
                        }
                        _ => json!({"type": "text", "text": "voice_accepted: no matching outgoing call"}),
                    }
                }
                "voice_rejected" => {
                    // Peer rejected our outgoing call — clear state
                    let peer_short = {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if call_state.as_ref().map_or(false, |cs| {
                            cs.is_ringing() && cs.direction == crate::voice::CallDirection::Outgoing
                        }) {
                            let s = call_state.as_ref()
                                .map(|cs| cs.peer_key[..8.min(cs.peer_key.len())].to_string())
                                .unwrap_or_default();
                            *call_state = None;
                            s
                        } else {
                            return json!({"type": "text", "text": "voice_rejected: no matching outgoing call"});
                        }
                    };
                    if let Some(ref mut vs) = *voice_lock { vs.stop(); }
                    *voice_lock = None;
                    eprintln!("[SPF-VOICE] Call rejected by {}", peer_short);
                    json!({"type": "text", "text": format!("Call rejected by {}", peer_short)})
                }
                "voice_end" => {
                    // Peer ended an active or ringing call — clear state
                    let call_info = {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        call_state.take().map(|cs| (
                            cs.peer_key[..8.min(cs.peer_key.len())].to_string(),
                            cs.elapsed_secs()
                        ))
                    };
                    match call_info {
                        Some((peer_short, secs)) => {
                            if let Some(ref mut vs) = *voice_lock { vs.stop(); }
                            *voice_lock = None;
                            eprintln!("[SPF-VOICE] Peer {} ended call ({}s)", peer_short, secs);
                            json!({"type": "text", "text": format!(
                                "Call ended by peer {}. Duration: {}s", peer_short, secs
                            )})
                        }
                        None => json!({"type": "text", "text": "voice_end: no active call"}),
                    }
                }
                "team_join_notify" => {
                    // Peer has joined a team channel — update local active_members
                    let team_id = args.get("team_id").and_then(|v| v.as_str()).unwrap_or("default").to_string();
                    let peer_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("").to_string();
                    let display_name = args.get("display_name").and_then(|v| v.as_str())
                        .unwrap_or(&peer_key[..8.min(peer_key.len())]).to_string();
                    if peer_key.is_empty() {
                        return json!({"type": "text", "text": "team_join_notify: missing peer_key"});
                    }
                    let summary = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        let channel = teams.entry(team_id.clone())
                            .or_insert_with(|| crate::voice::TeamChannel::new(&team_id, &team_id));
                        channel.join(&peer_key, &display_name);
                        channel.summary_line()
                    };
                    eprintln!("[SPF-VOICE] Team {}: peer {} ({}) joined — {}", team_id, &peer_key[..8.min(peer_key.len())], display_name, summary);
                    json!({"type": "text", "text": format!(
                        "Peer {} ({}) joined team [{}]. {}", &peer_key[..8.min(peer_key.len())], display_name, team_id, summary
                    )})
                }
                "team_leave_notify" => {
                    // Peer has left a team channel — remove from local active_members
                    let team_id = args.get("team_id").and_then(|v| v.as_str()).unwrap_or("default").to_string();
                    let peer_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("").to_string();
                    if peer_key.is_empty() {
                        return json!({"type": "text", "text": "team_leave_notify: missing peer_key"});
                    }
                    let (was_present, summary) = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(channel) = teams.get_mut(&team_id) {
                            let was = channel.leave(&peer_key);
                            (was, channel.summary_line())
                        } else {
                            (false, format!("team [{}] not found", team_id))
                        }
                    };
                    eprintln!("[SPF-VOICE] Team {}: peer {} left (was_present={})", team_id, &peer_key[..8.min(peer_key.len())], was_present);
                    json!({"type": "text", "text": format!(
                        "Peer {} left team [{}]. {}", &peer_key[..8.min(peer_key.len())], team_id, summary
                    )})
                }
                "team_invite" => {
                    // We have been invited to a team channel — create/update local channel entry
                    let team_id = args.get("team_id").and_then(|v| v.as_str()).unwrap_or("default").to_string();
                    let team_name = args.get("team_name").and_then(|v| v.as_str()).unwrap_or(&team_id).to_string();
                    let from_key = args.get("from_key").and_then(|v| v.as_str()).unwrap_or("").to_string();
                    {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        let channel = teams.entry(team_id.clone())
                            .or_insert_with(|| crate::voice::TeamChannel::new(&team_id, &team_name));
                        if !from_key.is_empty() {
                            channel.add_member(&from_key);
                        }
                    }
                    eprintln!("[SPF-VOICE] Invited to team [{}] ({}) by {}", team_id, team_name, &from_key[..8.min(from_key.len())]);
                    json!({"type": "text", "text": format!(
                        "Invited to team [{}] '{}' by peer {}. Use spf_voice_team action=join team_id={} to join.",
                        team_id, team_name, &from_key[..8.min(from_key.len())], team_id
                    )})
                }
                "listen" => {
                    // Block MM: Capture mic audio for N seconds → Whisper STT → return text
                    let duration_secs = args.get("duration").and_then(|v| v.as_u64()).unwrap_or(5).min(60);

                    // Ensure session is started (input device initialised)
                    if voice_lock.is_none() {
                        let config = crate::voice::VoiceConfig::default();
                        *voice_lock = Some(crate::voice::VoiceSession::new(config));
                    }
                    if let Some(ref mut session) = *voice_lock {
                        if !session.is_active() {
                            if let Err(e) = session.start() {
                                return json!({"type": "text", "text": format!("Failed to start audio input: {}", e)});
                            }
                        }
                    }

                    // Collect frames for the requested duration
                    let deadline = std::time::Duration::from_secs(duration_secs);
                    let start = std::time::Instant::now();
                    let mut frames: Vec<crate::voice::VoiceFrame> = Vec::new();

                    while start.elapsed() < deadline {
                        if let Some(ref mut session) = *voice_lock {
                            match session.capture_frame("listen") {
                                Ok(frame) => frames.push(frame),
                                Err(crate::voice::VoiceError::NotAvailable(_)) => {
                                    return json!({"type": "text", "text": "Audio input not available. Ensure pulseaudio is running (pulseaudio --start) and spf-voice crate is compiled."});
                                }
                                Err(e) => {
                                    eprintln!("[SPF-VOICE-LISTEN] capture error: {}", e);
                                    std::thread::sleep(std::time::Duration::from_millis(5));
                                }
                            }
                        }
                    }

                    if frames.is_empty() {
                        return json!({"type": "text", "text": "No audio captured. Ensure voice session is active and microphone is accessible."});
                    }

                    // Transcribe via Whisper (voice-stt feature) or stub
                    match voice_lock.as_mut().and_then(|s| Some(s.transcribe(&frames))) {
                        Some(Ok(text)) if text.trim().is_empty() => {
                            json!({"type": "text", "text": "(silence — no speech detected)"})
                        }
                        Some(Ok(text)) => json!({"type": "text", "text": text}),
                        Some(Err(crate::voice::VoiceError::NotAvailable(_))) => {
                            json!({"type": "text", "text": "STT not available. Rebuild with --features voice-stt to enable Whisper transcription."})
                        }
                        Some(Err(e)) => json!({"type": "text", "text": format!("Transcription error: {}", e)}),
                        None => json!({"type": "text", "text": "Voice session unavailable."}),
                    }
                }
                "stream_on" => {
                    #[cfg(feature = "voice-stt")]
                    {
                        let model_dir = crate::paths::spf_root().join("LIVE/MODELS/whisper-tiny");
                        match crate::voice::stream_on(model_dir) {
                            Ok(()) => json!({"type": "text", "text": "Streaming STT started. Speak freely. Say 'end stream' or 'stop stream' to finish. Use stream_read to get transcripts."}),
                            Err(e) => json!({"type": "text", "text": format!("Failed to start streaming STT: {}", e)}),
                        }
                    }
                    #[cfg(not(feature = "voice-stt"))]
                    json!({"type": "text", "text": "stream_on requires voice-stt feature."})
                }
                "stream_off" => {
                    crate::voice::stream_off();
                    json!({"type": "text", "text": "Streaming STT stopped."})
                }
                "stream_read" => {
                    let active = crate::voice::STREAM_ACTIVE.load(std::sync::atomic::Ordering::SeqCst);
                    let transcripts = crate::voice::stream_read();
                    if transcripts.is_empty() {
                        json!({"type": "text", "text": format!("No transcripts yet. Streaming: {}", active)})
                    } else {
                        let combined = transcripts.join("\n");
                        json!({"type": "text", "text": format!("Streaming: {}\n---\n{}", active, combined)})
                    }
                }
                other => {
                    json!({"type": "text", "text": format!(
                        "Unknown voice action: '{}'. Valid: start, stop, status, speak, listen, stream_on, stream_off, stream_read, call, end_call, settings, incoming_ring, voice_accepted, voice_rejected, voice_end, team_join_notify, team_leave_notify, team_invite", other
                    )})
                }
            }
        }

        // ====== VOICE CALL (Block TV-5) ======
        "spf_voice_call" => {
            session.record_action("spf_voice_call", "called", None);
            let action = args["action"].as_str().unwrap_or("status");
            let mut voice_lock = crate::voice::VOICE_SESSION.lock().unwrap_or_else(|e| e.into_inner());

            match action {
                "start" => {
                    let peer_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("");
                    if peer_key.is_empty() {
                        return json!({"type": "text", "text": "Error: 'peer_key' required for start"});
                    }
                    // Check not already in a call
                    {
                        let call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(ref cs) = *call_state {
                            if cs.is_in_progress() {
                                let phase = if cs.is_ringing() { "ringing" } else { "active" };
                                return json!({"type": "text", "text": format!(
                                    "Already in call ({} {}). Use end first.",
                                    phase, &cs.peer_key[..8.min(cs.peer_key.len())]
                                )});
                            }
                        }
                    }
                    let peer_name = args.get("peer_name")
                        .and_then(|v| v.as_str())
                        .unwrap_or(&peer_key[..8.min(peer_key.len())])
                        .to_string();
                    // Start voice session
                    if voice_lock.as_ref().map_or(true, |s| !s.is_active()) {
                        let mut vs = crate::voice::VoiceSession::new(crate::voice::VoiceConfig::default());
                        match vs.start() {
                            Ok(()) => { *voice_lock = Some(vs); }
                            Err(e) => return json!({"type": "text", "text": format!("Voice start failed: {}", e)}),
                        }
                    }
                    // Store call state
                    {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        *call_state = Some(crate::voice::CallState {
                            peer_key: peer_key.to_string(),
                            peer_name: peer_name.clone(),
                            direction: crate::voice::CallDirection::Outgoing,
                            phase: crate::voice::CallPhase::Ringing,
                            started_at: std::time::Instant::now(),
                        });
                    }
                    // Signal peer via mesh: incoming_ring
                    let signal = if let Some(ref tx) = mesh_tx {
                        let addrs: Vec<String> = peers.get(peer_key)
                            .map(|p| p.addr.clone())
                            .unwrap_or_default();
                        let (reply_tx, reply_rx) = std::sync::mpsc::channel();
                        let req = crate::mesh::MeshRequest {
                            peer_key: peer_key.to_string(),
                            addrs,
                            tool: "spf_voice_mode".to_string(),
                            args: json!({"action": "incoming_ring", "peer_key": pub_key_hex}),
                            reply: reply_tx,
                        };
                        if tx.send(req).is_ok() {
                            match reply_rx.recv_timeout(std::time::Duration::from_secs(5)) {
                                Ok(Ok(_)) => "signal delivered",
                                _ => "signal pending (peer may be offline)",
                            }
                        } else { "mesh unavailable" }
                    } else { "mesh not configured" };
                    json!({"type": "text", "text": format!(
                        "Calling {} ({})... {}. Use action=end to hang up.",
                        peer_name, &peer_key[..8.min(peer_key.len())], signal
                    )})
                }
                "accept" => {
                    // Accept an incoming ringing call
                    let (peer_key, peer_name) = {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        match &mut *call_state {
                            Some(cs) if cs.is_ringing() && cs.direction == crate::voice::CallDirection::Incoming => {
                                cs.phase = crate::voice::CallPhase::Active;
                                (cs.peer_key.clone(), cs.peer_name.clone())
                            }
                            _ => return json!({"type": "text", "text": "No incoming ringing call to accept"}),
                        }
                    };
                    // Start voice session
                    if voice_lock.as_ref().map_or(true, |s| !s.is_active()) {
                        let mut vs = crate::voice::VoiceSession::new(crate::voice::VoiceConfig::default());
                        if vs.start().is_ok() { *voice_lock = Some(vs); }
                    }
                    // Signal peer: voice_accepted
                    if let Some(ref tx) = mesh_tx {
                        let addrs: Vec<String> = peers.get(&peer_key)
                            .map(|p| p.addr.clone())
                            .unwrap_or_default();
                        let (reply_tx, _) = std::sync::mpsc::channel();
                        let _ = tx.send(crate::mesh::MeshRequest {
                            peer_key: peer_key.clone(),
                            addrs,
                            tool: "spf_voice_mode".to_string(),
                            args: json!({"action": "voice_accepted", "peer_key": pub_key_hex}),
                            reply: reply_tx,
                        });
                    }
                    json!({"type": "text", "text": format!("Call accepted — connected to {}", peer_name)})
                }
                "reject" => {
                    // Reject an incoming ringing call
                    let peer_key = {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if call_state.as_ref().map_or(false, |cs| {
                            cs.is_ringing() && cs.direction == crate::voice::CallDirection::Incoming
                        }) {
                            let k = call_state.as_ref().map(|cs| cs.peer_key.clone()).unwrap_or_default();
                            *call_state = None;
                            k
                        } else {
                            return json!({"type": "text", "text": "No incoming ringing call to reject"});
                        }
                    };
                    // Signal peer: voice_rejected
                    if let Some(ref tx) = mesh_tx {
                        let addrs: Vec<String> = peers.get(&peer_key)
                            .map(|p| p.addr.clone())
                            .unwrap_or_default();
                        let (reply_tx, _) = std::sync::mpsc::channel();
                        let _ = tx.send(crate::mesh::MeshRequest {
                            peer_key: peer_key.clone(),
                            addrs,
                            tool: "spf_voice_mode".to_string(),
                            args: json!({"action": "voice_rejected", "peer_key": pub_key_hex}),
                            reply: reply_tx,
                        });
                    }
                    json!({"type": "text", "text": format!(
                        "Rejected call from {}", &peer_key[..8.min(peer_key.len())]
                    )})
                }
                "end" => {
                    // End any active or ringing call
                    let call_opt = {
                        let mut call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                        if call_state.as_ref().map_or(false, |cs| cs.is_in_progress()) {
                            call_state.take()
                        } else {
                            None
                        }
                    };
                    match call_opt {
                        Some(cs) => {
                            let peer_key = cs.peer_key.clone();
                            let secs = cs.elapsed_secs();
                            // Stop voice session
                            if let Some(ref mut vs) = *voice_lock { vs.stop(); }
                            *voice_lock = None;
                            // Signal peer: voice_end
                            if let Some(ref tx) = mesh_tx {
                                let addrs: Vec<String> = peers.get(&peer_key)
                                    .map(|p| p.addr.clone())
                                    .unwrap_or_default();
                                let (reply_tx, _) = std::sync::mpsc::channel();
                                let _ = tx.send(crate::mesh::MeshRequest {
                                    peer_key: peer_key.clone(),
                                    addrs,
                                    tool: "spf_voice_mode".to_string(),
                                    args: json!({"action": "voice_end", "peer_key": pub_key_hex}),
                                    reply: reply_tx,
                                });
                            }
                            let mins = secs / 60;
                            let rem = secs % 60;
                            json!({"type": "text", "text": format!(
                                "Call ended. Duration: {}m {}s", mins, rem
                            )})
                        }
                        None => json!({"type": "text", "text": "No active call to end"}),
                    }
                }
                "status" => {
                    let call_state = crate::voice::CALL_STATE.lock().unwrap_or_else(|e| e.into_inner());
                    match &*call_state {
                        Some(cs) => {
                            let dir = if cs.direction == crate::voice::CallDirection::Incoming { "Incoming" } else { "Outgoing" };
                            let phase = if cs.is_ringing() { "ringing" } else { "active" };
                            json!({"type": "text", "text": format!(
                                "{} call with {} ({}) — {} — {}s elapsed",
                                dir, cs.peer_name,
                                &cs.peer_key[..8.min(cs.peer_key.len())],
                                phase, cs.elapsed_secs()
                            )})
                        }
                        None => json!({"type": "text", "text": "No active call"}),
                    }
                }
                other => json!({"type": "text", "text": format!(
                    "Unknown action: '{}'. Valid: start, accept, reject, end, status", other
                )}),
            }
        }

        // ====== VOICE TEAM (Block TV-6) ======
        "spf_voice_team" => {
            session.record_action("spf_voice_team", "called", None);
            let action = args["action"].as_str().unwrap_or("list");
            let team_id = args.get("team_id").and_then(|v| v.as_str()).unwrap_or("default").to_string();

            match action {
                "create" => {
                    let name = args.get("name").and_then(|v| v.as_str()).unwrap_or("").to_string();
                    if name.is_empty() {
                        return json!({"type": "text", "text": "Error: 'name' required for create"});
                    }
                    let summary = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        if teams.contains_key(&team_id) {
                            return json!({"type": "text", "text": format!(
                                "Team [{}] already exists. Use status to inspect.", team_id
                            )});
                        }
                        let ch = crate::voice::TeamChannel::new(&team_id, &name);
                        let s = ch.summary_line();
                        teams.insert(team_id.clone(), ch);
                        s
                    };
                    json!({"type": "text", "text": format!("Created team [{}]: {}", team_id, summary)})
                }
                "join" => {
                    let display_name = args.get("display_name").and_then(|v| v.as_str())
                        .unwrap_or(&pub_key_hex[..8.min(pub_key_hex.len())]).to_string();
                    // Join locally
                    let (active_keys, summary) = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        let channel = teams.entry(team_id.clone())
                            .or_insert_with(|| crate::voice::TeamChannel::new(&team_id, &team_id));
                        channel.join(pub_key_hex, &display_name);
                        (channel.active_peer_keys(), channel.summary_line())
                    };
                    // Notify all other active members
                    let mut notified = 0usize;
                    for peer_key in &active_keys {
                        if peer_key == pub_key_hex { continue; }
                        if let Some(ref tx) = mesh_tx {
                            let addrs: Vec<String> = peers.get(peer_key)
                                .map(|p| p.addr.clone())
                                .unwrap_or_default();
                            let (reply_tx, _) = std::sync::mpsc::channel();
                            let _ = tx.send(crate::mesh::MeshRequest {
                                peer_key: peer_key.clone(),
                                addrs,
                                tool: "spf_voice_mode".to_string(),
                                args: json!({
                                    "action": "team_join_notify",
                                    "team_id": team_id,
                                    "peer_key": pub_key_hex,
                                    "display_name": display_name
                                }),
                                reply: reply_tx,
                            });
                            notified += 1;
                        }
                    }
                    json!({"type": "text", "text": format!(
                        "Joined team [{}] as '{}'. Notified {} peers. {}",
                        team_id, display_name, notified, summary
                    )})
                }
                "leave" => {
                    let (was_present, active_keys, summary) = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        if let Some(channel) = teams.get_mut(&team_id) {
                            // Snapshot active peers BEFORE leaving (so we still notify them)
                            let keys = channel.active_peer_keys();
                            let was = channel.leave(pub_key_hex);
                            (was, keys, channel.summary_line())
                        } else {
                            return json!({"type": "text", "text": format!("Team [{}] not found", team_id)});
                        }
                    };
                    if !was_present {
                        return json!({"type": "text", "text": format!("Not a member of team [{}]", team_id)});
                    }
                    // Notify remaining active members
                    let mut notified = 0usize;
                    for peer_key in &active_keys {
                        if peer_key == pub_key_hex { continue; }
                        if let Some(ref tx) = mesh_tx {
                            let addrs: Vec<String> = peers.get(peer_key)
                                .map(|p| p.addr.clone())
                                .unwrap_or_default();
                            let (reply_tx, _) = std::sync::mpsc::channel();
                            let _ = tx.send(crate::mesh::MeshRequest {
                                peer_key: peer_key.clone(),
                                addrs,
                                tool: "spf_voice_mode".to_string(),
                                args: json!({
                                    "action": "team_leave_notify",
                                    "team_id": team_id,
                                    "peer_key": pub_key_hex
                                }),
                                reply: reply_tx,
                            });
                            notified += 1;
                        }
                    }
                    json!({"type": "text", "text": format!(
                        "Left team [{}]. Notified {} peers. {}", team_id, notified, summary
                    )})
                }
                "add" => {
                    // Invite a peer to the team (add to members list + signal them)
                    let peer_key = args.get("peer_key").and_then(|v| v.as_str()).unwrap_or("");
                    if peer_key.is_empty() {
                        return json!({"type": "text", "text": "Error: 'peer_key' required for add"});
                    }
                    let (team_name, summary) = {
                        let mut teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                        let channel = teams.entry(team_id.clone())
                            .or_insert_with(|| crate::voice::TeamChannel::new(&team_id, &team_id));
                        channel.add_member(peer_key);
                        (channel.name.clone(), channel.summary_line())
                    };
                    // Signal peer: team_invite
                    if let Some(ref tx) = mesh_tx {
                        let addrs: Vec<String> = peers.get(peer_key)
                            .map(|p| p.addr.clone())
                            .unwrap_or_default();
                        let (reply_tx, _) = std::sync::mpsc::channel();
                        let _ = tx.send(crate::mesh::MeshRequest {
                            peer_key: peer_key.to_string(),
                            addrs,
                            tool: "spf_voice_mode".to_string(),
                            args: json!({
                                "action": "team_invite",
                                "team_id": team_id,
                                "team_name": team_name,
                                "from_key": pub_key_hex
                            }),
                            reply: reply_tx,
                        });
                    }
                    json!({"type": "text", "text": format!(
                        "Added {} to team [{}]. Invite signal sent. {}",
                        &peer_key[..8.min(peer_key.len())], team_id, summary
                    )})
                }
                "list" => {
                    let teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                    if teams.is_empty() {
                        json!({"type": "text", "text": "No team channels. Use action=create to add one."})
                    } else {
                        let lines: Vec<String> = teams.values().map(|ch| ch.summary_line()).collect();
                        json!({"type": "text", "text": format!("Team channels ({}):\n{}", lines.len(), lines.join("\n"))})
                    }
                }
                "status" => {
                    let teams = crate::voice::VOICE_TEAMS.lock().unwrap_or_else(|e| e.into_inner());
                    match teams.get(&team_id) {
                        Some(ch) => {
                            let members_str = if ch.members.is_empty() {
                                "  none".to_string()
                            } else {
                                ch.members.iter().map(|k| format!("  {}", &k[..8.min(k.len())])).collect::<Vec<_>>().join("\n")
                            };
                            let active_str = if ch.active_members.is_empty() {
                                "  none".to_string()
                            } else {
                                ch.active_members.iter().map(|m| format!(
                                    "  {} ({})", &m.peer_key[..8.min(m.peer_key.len())], m.name
                                )).collect::<Vec<_>>().join("\n")
                            };
                            json!({"type": "text", "text": format!(
                                "Team [{}] '{}'\nInvited ({}):\n{}\nActive ({}):\n{}",
                                ch.team_id, ch.name,
                                ch.member_count(), members_str,
                                ch.active_count(), active_str
                            )})
                        }
                        None => json!({"type": "text", "text": format!("Team [{}] not found. Use list to see all channels.", team_id)}),
                    }
                }
                other => json!({"type": "text", "text": format!(
                    "Unknown action: '{}'. Valid: create, join, leave, add, list, status", other
                )}),
            }
        }

        // ====== FLINT WORKER MODE (Block II) ======
        "spf_flint_execute" => {
            session.record_action("spf_flint_execute", "called", None);

            // Verify transformer is loaded (Option<Arc<RwLock>> — check outer + lock)
            let transformer_loaded = transformer.as_ref()
                .and_then(|t| t.read().ok())
                .is_some();

            if !transformer_loaded {
                return json!({"type": "text", "text":
                    "[FLINT] Error: transformer not loaded — cannot execute in worker mode"});
            }

            let tool_name = args["tool_name"].as_str().unwrap_or("");
            let tool_args = if args["arguments"].is_object() {
                args["arguments"].clone()
            } else {
                json!({})
            };
            let reason = args["reason"].as_str().unwrap_or("(no reason provided)");

            // RECURSION GUARD — prevent infinite self-invocation
            if tool_name == "spf_flint_execute" {
                return json!({"type": "text", "text":
                    "[FLINT] BLOCKED: recursive self-invocation not permitted"});
            }

            if tool_name.is_empty() {
                return json!({"type": "text", "text": "[FLINT] Error: tool_name is required"});
            }

            // Log the dispatch intent
            session.record_action("spf_flint_execute", "dispatching",
                Some(&format!("tool={} reason={}", tool_name, reason)));

            // Gate inner tool with Source::Transformer — same permissions as Stdio
            let flint_gate_params = extract_gate_params(&tool_args);
            let flint_source = crate::dispatch::Source::Transformer {
                role: "worker".to_string(),
                model_id: "flint".to_string(),
            };
            let flint_decision = crate::gate::process(tool_name, &flint_gate_params, config, session, &flint_source);
            if !flint_decision.allowed {
                return json!({
                    "type": "text",
                    "text": format!("[FLINT] BLOCKED: {}", flint_decision.message),
                    "_blocked": true
                });
            }
            let result = handle_tool_call(
                tool_name, &tool_args, flint_source, &flint_decision, config, session, storage,
                config_db, tmp_db, _fs_db, agent_db, pub_key_hex,
                mesh_tx, peers, transformer, transformer_config,
                network_config, pool_state, pipeline,
                browser, ws_browser_channels, http_port,
                tracked_peers, orchestrator_state,
                endpoint, tokio_handle,
            );

            // Extract result and tag with [FLINT] prefix for identification
            let result_text = result.get("text")
                .and_then(|t| t.as_str())
                .unwrap_or("(no output)");
            let was_blocked = result.get("_blocked")
                .and_then(|b| b.as_bool())
                .unwrap_or(false);

            json!({
                "type": "text",
                "text": format!("[FLINT] Tool: {} | Reason: {} | {}{}",
                    tool_name, reason,
                    if was_blocked { "BLOCKED: " } else { "" },
                    result_text
                ),
                "_flint_worker": true,
                "_tool_executed": tool_name,
                "_was_blocked": was_blocked
            })
        }

        // ====== NETWORK POOL TOOLS (Block NP) ======

        "spf_pool_status" => {
            match pool_state {
                Some(pool) => {
                    let snapshot = pool.status_snapshot();
                    let idle = pool.idle_count();
                    let active = pool.active_count();
                    let cap = pool.capacity();
                    let mut lines = vec![
                        format!("Network Pool — NetAdmin | {}/{} workers active | {} idle | capacity {}", active, cap, idle, cap),
                    ];
                    for (name, status, task_id, elapsed_ms) in &snapshot {
                        let task_str = task_id.as_deref().unwrap_or("-");
                        lines.push(format!("  {:<20} {:8}  task={:<30}  elapsed={}ms", name, status, task_str, elapsed_ms));
                    }
                    json!({"type": "text", "text": lines.join("\n")})
                }
                None => {
                    let role = if network_config.is_netadmin() { "NetAdmin (pool not initialised)" } else { "Worker" };
                    json!({"type": "text", "text": format!("Network role: {}\nPool management delegated to NetAdmin node.", role)})
                }
            }
        }

        "spf_pool_assign" => {
            if !network_config.is_netadmin() {
                return json!({"type": "text", "text": "BLOCKED: spf_pool_assign requires NetAdmin role", "_blocked": true});
            }
            let pool = match pool_state {
                Some(p) => p,
                None => return json!({"type": "text", "text": "Pool not initialised"}),
            };
            let tool_name = args["tool"].as_str().unwrap_or("unknown");
            let worker_name_arg = args["worker_name"].as_str();

            // Resolve worker key: by name if given, else auto-select idle
            let key_hex = match worker_name_arg {
                Some(name) => pool.find_by_name(name),
                None       => pool.find_idle(),
            };
            let key_hex = match key_hex {
                Some(k) => k,
                None    => return json!({"type": "text", "text": "No idle workers available in pool"}),
            };

            let task_id = crate::network::new_task_id();
            match pool.borrow(&key_hex, &task_id) {
                Ok(()) => {
                    let peer = pool.get_peer(&key_hex);
                    let wname = peer.as_ref().map(|p| p.name.as_str()).unwrap_or("unknown");
                    session.record_action("spf_pool_assign", &task_id, Some(wname));
                    json!({"type": "text", "text": format!(
                        "Task assigned\ntask_id:    {}\nworker:     {}\nworker_key: {}\ntool:       {}",
                        task_id, wname, key_hex, tool_name
                    )})
                }
                Err(e) => json!({"type": "text", "text": format!("Assign failed: {}", e)}),
            }
        }

        "spf_pool_release" => {
            if !network_config.is_netadmin() {
                return json!({"type": "text", "text": "BLOCKED: spf_pool_release requires NetAdmin role", "_blocked": true});
            }
            let pool = match pool_state {
                Some(p) => p,
                None => return json!({"type": "text", "text": "Pool not initialised"}),
            };
            let task_id = args["task_id"].as_str().unwrap_or("");
            let result_val = args.get("result").cloned().unwrap_or(serde_json::json!({}));

            // Find which worker holds this task_id via snapshot scan
            let snapshot = pool.status_snapshot();
            let worker_name_for_lookup: Option<String> = snapshot.iter()
                .find(|(_, _, tid, _)| tid.as_deref() == Some(task_id))
                .map(|(name, _, _, _)| name.clone());

            let key_hex = worker_name_for_lookup
                .as_deref()
                .and_then(|n| pool.find_by_name(n));

            let key_hex = match key_hex {
                Some(k) => k,
                None => return json!({"type": "text", "text": format!("No worker found holding task_id: {}", task_id)}),
            };

            match pool.release(&key_hex) {
                Ok(wname) => {
                    let result_hash = crate::network::hash_result(&result_val);
                    session.record_manifest(task_id, 0, "POOL_RELEASE", Some(&wname));
                    json!({"type": "text", "text": format!(
                        "Worker released\ntask_id:     {}\nworker:      {}\nresult_hash: {}\nPool: {}/{} idle",
                        task_id, wname, result_hash, pool.idle_count(), pool.capacity()
                    )})
                }
                Err(e) => json!({"type": "text", "text": format!("Release failed: {}", e)}),
            }
        }

        // ====== CHANNEL HUB (Block CH-5) ======
        "spf_channel" => {
            session.record_action("spf_channel", "called", None);
            let action = args["action"].as_str().unwrap_or("status");
            let channel_id = args["channel_id"].as_str().unwrap_or("");
            let display_name = args["name"].as_str().unwrap_or("Agent");
            let text = args["text"].as_str().unwrap_or("");
            let limit = args["limit"].as_u64().unwrap_or(50) as usize;
            let msg_type_str = args["msg_type"].as_str().unwrap_or("text");
            let hub_url = args["hub_url"].as_str().unwrap_or("");

            let msg_type = match msg_type_str {
                "tool_result" => crate::channel::MessageType::ToolResult,
                "system" => crate::channel::MessageType::System,
                _ => crate::channel::MessageType::Text,
            };

            match action {
                // --- Hub-side actions (orchestrator runs the hub) ---
                "create" => {
                    let ch_name = if display_name == "Agent" && !text.is_empty() { text } else { display_name };
                    let name_arg = args["name"].as_str().unwrap_or(ch_name);
                    let result = crate::channel::api_create_channel(name_arg, pub_key_hex, display_name);
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                "join" => {
                    if channel_id.is_empty() {
                        return json!({"type": "text", "text": "Error: channel_id required for join"});
                    }
                    let result = crate::channel::api_join_channel(channel_id, pub_key_hex, display_name);
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                "leave" => {
                    if channel_id.is_empty() {
                        return json!({"type": "text", "text": "Error: channel_id required for leave"});
                    }
                    let result = crate::channel::api_leave_channel(channel_id, pub_key_hex);
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                "send" => {
                    if channel_id.is_empty() || text.is_empty() {
                        return json!({"type": "text", "text": "Error: channel_id and text required for send"});
                    }
                    let result = crate::channel::api_send_message(channel_id, pub_key_hex, display_name, text, msg_type);
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                "history" => {
                    if channel_id.is_empty() {
                        return json!({"type": "text", "text": "Error: channel_id required for history"});
                    }
                    let result = crate::channel::api_channel_history(channel_id, limit);
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                "list" => {
                    let result = crate::channel::api_list_channels();
                    json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                }

                // --- Client-side actions (agent connects to remote hub) ---
                "connect" => {
                    if hub_url.is_empty() || channel_id.is_empty() {
                        return json!({"type": "text", "text": "Error: hub_url and channel_id required for connect"});
                    }
                    // Get tokio handle for spawning WS client task
                    let rt_guard = tokio_handle.lock().unwrap();
                    let handle = match rt_guard.as_ref() {
                        Some(h) => h,
                        None => return json!({"type": "text", "text": "Error: tokio runtime not available (mesh not started?)"}),
                    };
                    // Derive API key for hub auth
                    let api_key = std::env::var("SPF_API_KEY").unwrap_or_default();
                    match crate::channel::ws_client_connect(handle, hub_url, channel_id, &api_key, pub_key_hex, display_name) {
                        Ok(key) => json!({"type": "text", "text": format!("Connected to {} #{}\nClient key: {}", hub_url, channel_id, key)}),
                        Err(e) => json!({"type": "text", "text": format!("Connect failed: {}", e)}),
                    }
                }

                "disconnect" => {
                    if hub_url.is_empty() || channel_id.is_empty() {
                        return json!({"type": "text", "text": "Error: hub_url and channel_id required for disconnect"});
                    }
                    let key = format!("{}#{}", hub_url, channel_id);
                    match crate::channel::ws_client_disconnect(&key) {
                        Ok(()) => json!({"type": "text", "text": format!("Disconnected from {}", key)}),
                        Err(e) => json!({"type": "text", "text": format!("Disconnect error: {}", e)}),
                    }
                }

                "listen" => {
                    // If hub_url provided, drain from WS client buffer (agent-side)
                    if !hub_url.is_empty() && !channel_id.is_empty() {
                        let key = format!("{}#{}", hub_url, channel_id);
                        match crate::channel::ws_client_drain(&key) {
                            Ok(msgs) => {
                                if msgs.is_empty() {
                                    json!({"type": "text", "text": "No new messages"})
                                } else {
                                    json!({"type": "text", "text": serde_json::to_string_pretty(&msgs).unwrap_or_default()})
                                }
                            }
                            Err(e) => json!({"type": "text", "text": format!("Listen error: {}", e)}),
                        }
                    } else if !channel_id.is_empty() {
                        // Hub-side: just return recent history
                        let result = crate::channel::api_channel_history(channel_id, limit);
                        json!({"type": "text", "text": serde_json::to_string_pretty(&result).unwrap_or_default()})
                    } else {
                        json!({"type": "text", "text": "Error: channel_id required for listen (hub_url also needed for remote)"})
                    }
                }

                "status" => {
                    let clients = crate::channel::ws_client_list();
                    let channels = crate::channel::api_list_channels();
                    json!({"type": "text", "text": format!(
                        "Channel Hub Status:\n{}\n\nWS Client Connections:\n{}",
                        serde_json::to_string_pretty(&channels).unwrap_or_default(),
                        serde_json::to_string_pretty(&clients).unwrap_or_default()
                    )})
                }

                other => {
                    json!({"type": "text", "text": format!("Unknown channel action: {}. Use: create, join, leave, send, listen, history, list, connect, disconnect, status", other)})
                }
            }
        }

        _ => {
            json!({"type": "text", "text": format!("Unknown tool: {}", name)})
        }
    }
}

/// Main MCP server loop — runs forever on stdio
/// Build dispatch listeners based on configuration.
/// Wires GateTrainingCollector when transformer is enabled — captures gate
/// decisions as supervised training signals for the learning pipeline.
fn build_listeners(
    _config: &SpfConfig,
    transformer_config: &crate::config::TransformerConfig,
) -> (Vec<Box<dyn crate::dispatch::DispatchListener>>, Option<std::sync::Arc<crate::gate_training::GateTrainingCollector>>) {
    let mut listeners: Vec<Box<dyn crate::dispatch::DispatchListener>> = Vec::new();
    let mut collector_arc = None;
    if transformer_config.enabled {
        let collector = std::sync::Arc::new(
            crate::gate_training::GateTrainingCollector::new(10000)
        );
        listeners.push(Box::new(collector.clone()));
        collector_arc = Some(collector);
        log("GateTrainingCollector registered as DispatchListener (Arc-shared)");
    }
    (listeners, collector_arc)
}

/// Return the number of registered MCP tools (for dynamic reporting).
pub fn tool_count() -> usize {
    tool_definitions().len()
}

/// Run in headless worker mode — no stdio MCP loop.
/// Sets up LMDBs, identity, mesh, HTTP monitoring, then enters worker loop.
pub fn run_worker(
    config: SpfConfig,
    config_db: SpfConfigDb,
    session: Session,
    storage: SpfStorage,
    http_config: crate::config::HttpConfig,
    transformer: std::sync::Arc<std::sync::RwLock<crate::transformer_tools::TransformerState>>,
    transformer_config: crate::config::TransformerConfig,
    worker_config: crate::worker::WorkerConfig,
) {
    use std::sync::{Arc, Mutex};

    log("[SPF-WORKER] Starting worker mode (no stdio)");

    // Init voice team channels from config (idempotent)
    crate::voice::init_voice_teams();

    // Init in-process brain (MiniLM-L6-v2 + LMDB) — replaces subprocess brain
    crate::brain_local::init_brain();
    crate::brain_local::index_knowledge_docs();
    crate::brain_local::index_spf_sources();

    let live_base = spf_root().join("LIVE");

    // Open LMDBs (same as run)
    let tmp_db = crate::tmp_db::SpfTmpDb::open(&live_base.join("TMP/TMP.DB")).ok();
    let agent_db = crate::agent_state::AgentStateDb::open(&live_base.join("LMDB5/LMDB5.DB")).ok();
    let fs_db = crate::fs::SpfFs::open(&live_base.join("SPF_FS")).ok();

    // Identity (same as run)
    let config_dir = crate::paths::spf_root().join("LIVE/CONFIG");
    let (signing_key, verifying_key) = crate::identity::ensure_identity(&config_dir);
    let pub_key_hex = hex::encode(verifying_key.to_bytes());
    let trusted_keys = crate::identity::load_trusted_keys(&config_dir.join("groups"));
    let peers = crate::identity::load_peers(&config_dir.join("groups"));
    log(&format!("[SPF-WORKER] Identity: {}", pub_key_hex));

    // SEC-3: Boot integrity check — verify .mcp.json routing + scan for rogue agent configs
    crate::identity::boot_integrity_check();

    // I-2 + CLONE FIX: Always sync api_key from current identity
    // On clone, ensure_identity() generates new key but http_config holds stale old key.
    // is_empty() missed this — old key isn't empty, just wrong. Always overwrite.
    let mut http_config = http_config;
    let derived_key = crate::identity::derive_api_key(&signing_key);
    http_config.api_key = derived_key;
    log("[SPF-WORKER] API key synced from identity");

    // Mesh channel
    let mesh_config = crate::config::MeshConfig::load(
        &crate::paths::spf_root().join("LIVE/CONFIG/mesh.json")
    ).unwrap_or_default();

    let (mesh_tx, mesh_rx) = if mesh_config.enabled {
        let (tx, rx) = crate::mesh::create_mesh_channel();
        (Some(tx), Some(rx))
    } else {
        (None, None)
    };

    // Build listeners before ServerState (need config ref before move)
    let (listeners, collector_arc) = build_listeners(&config, &transformer_config);

    // Wire collector into TransformerState so handle_train() can drain signals
    if let Some(ref collector) = collector_arc {
        let mut t_state = transformer.write().unwrap();
        t_state.collector = Some(collector.clone());
    }

    // Build ServerState
    // Workers always defer pool management to NetAdmin
    let worker_network_config = crate::config::NetworkConfig::load(
        &crate::paths::spf_root().join("LIVE/CONFIG/network.json")
    ).unwrap_or_default();

    let state = Arc::new(ServerState {
        config,
        config_db: Some(config_db),
        session: Mutex::new(session),
        storage,
        tmp_db,
        agent_db,
        fs_db,
        pub_key_hex: pub_key_hex.clone(),
        trusted_keys,
        auth_mode: http_config.auth_mode.clone(),
        nonce_cache: Mutex::new(std::collections::HashMap::new()),
        listeners,
        mesh_tx,
        peers,
        transformer: Some(transformer.clone()),
        transformer_config: transformer_config.clone(),
        pipeline: Arc::new(Mutex::new(crate::pipeline::PipelineState::new())),
        signing_key: signing_key.clone(),
        network_config: worker_network_config,
        pool_state: None,  // Workers never own the pool
        browser: std::sync::Mutex::new(crate::browser::BrowserSession::new()),
        ws_browser_channels: std::sync::Mutex::new(None),
        http_port: http_config.port,
        tracked_peers: std::sync::Mutex::new(std::collections::HashMap::new()),
        orchestrator_state: std::sync::Mutex::new(None),
        endpoint: std::sync::Mutex::new(None),
        tokio_handle: std::sync::Mutex::new(None),
    });

    // Spawn FLINT Memory Router — AFTER ServerState (needs Arc<ServerState> for dispatch::call)
    if let Some(ref collector) = collector_arc {
        crate::flint_memory::start_memory_router(
            collector.clone(), Some(transformer.clone()), state.clone()
        );
        log("FLINT Memory Router started (MB-FR/MB-FT) with auto-train + metrics");
    }

    // Start mesh transport
    if mesh_config.enabled {
        if let Some(rx) = mesh_rx {
            let mesh_state = state.clone();
            let mesh_key = signing_key.clone();
            std::thread::spawn(move || {
                let rt = tokio::runtime::Builder::new_multi_thread()
                    .worker_threads(2)
                    .enable_all()
                    .build()
                    .expect("[SPF-WORKER] Failed to build mesh runtime");
                rt.block_on(crate::mesh::run(mesh_state, mesh_key, mesh_config, rx));
            });
        }
    }

    // Start HTTP transport (monitoring only)
    if http_config.transport != "stdio" && !http_config.api_key.is_empty() {
        let http_state = state.clone();
        let api_key = http_config.api_key.clone();
        let bind = http_config.bind.clone();
        let port = http_config.port;
        std::thread::spawn(move || {
            crate::http::start(http_state, &bind, port, api_key, None);
        });
    }

    // Enter worker main loop (blocks forever)
    let mut worker_state = crate::worker::WorkerState::new(worker_config, transformer_config);
    crate::worker::run_worker(&mut worker_state, &transformer, &state);
}

pub fn run(config: SpfConfig, config_db: SpfConfigDb, session: Session, storage: SpfStorage, http_config: crate::config::HttpConfig) {
    log(&format!("Starting {} v{}", SERVER_NAME, SERVER_VERSION));
    log(&format!("Mode: {:?}", config.enforce_mode));

    // LIVE/ base — all LMDBs live here, outside Claude's writable zone
    let live_base = spf_root().join("LIVE");

    // CONFIG LMDB passed from main.rs — single open, single source of truth
    let config_db = Some(config_db);
    log("SPF_CONFIG LMDB active (passed from main)");

    // Initialize TMP_DB LMDB (was TMP_DB — tracks /tmp and /projects metadata)
    let tmp_db_path = live_base.join("TMP/TMP.DB");
    log(&format!("TMP_DB path: {:?}", tmp_db_path));

    let tmp_db = match SpfTmpDb::open(&tmp_db_path) {
        Ok(db) => {
            log(&format!("TMP_DB LMDB initialized at {:?}", tmp_db_path));
            Some(db)
        }
        Err(e) => {
            log(&format!("Warning: Failed to open TMP_DB LMDB at {:?}: {}", tmp_db_path, e));
            None
        }
    };

    // Initialize AGENT_STATE LMDB
    let agent_db_path = live_base.join("LMDB5/LMDB5.DB");
    log(&format!("AGENT_STATE path: {:?}", agent_db_path));

    let agent_db = match AgentStateDb::open(&agent_db_path) {
        Ok(db) => {
            if let Err(e) = db.init_defaults() {
                log(&format!("Warning: AGENT_STATE init_defaults failed: {}", e));
            }
            log(&format!("AGENT_STATE LMDB initialized at {:?}", agent_db_path));
            Some(db)
        }
        Err(e) => {
            log(&format!("Warning: Failed to open AGENT_STATE LMDB at {:?}: {}", agent_db_path, e));
            None
        }
    };

    // Initialize SPF_FS LMDB (LMDB 1: Virtual Filesystem)
    let fs_db_storage = live_base.join("SPF_FS");
    log(&format!("SPF_FS path: {:?}", fs_db_storage));

    let fs_db = match SpfFs::open(&fs_db_storage) {
        Ok(db) => {
            log(&format!("SPF_FS LMDB initialized at {:?}/SPF_FS.DB/", fs_db_storage));
            Some(db)
        }
        Err(e) => {
            log(&format!("Warning: Failed to open SPF_FS LMDB: {}", e));
            None
        }
    };

    // ================================================================
    // CRYPTOGRAPHIC IDENTITY — Ed25519 key pair for mesh auth
    // ================================================================
    let config_dir = crate::paths::spf_root().join("LIVE/CONFIG");
    let (signing_key, verifying_key) = crate::identity::ensure_identity(&config_dir);
    let pub_key_hex = hex::encode(verifying_key.to_bytes());
    let trusted_keys = crate::identity::load_trusted_keys(&config_dir.join("groups"));
    let peers = crate::identity::load_peers(&config_dir.join("groups"));
    log(&format!("Identity: {}", pub_key_hex));

    // SEC-3: Boot integrity check — verify .mcp.json routing + scan for rogue agent configs
    crate::identity::boot_integrity_check();

    // ================================================================
    // I-2 + CLONE FIX: Always sync api_key from current identity
    // ensure_identity() may have generated a NEW key (clone detected),
    // but http_config was loaded BEFORE that — holds stale old key.
    // Old is_empty() check missed clones (old key not empty, just wrong).
    // Deterministic: same signing_key always produces same api_key.
    // ================================================================
    let mut http_config = http_config; // shadow as mutable
    let derived_key = crate::identity::derive_api_key(&signing_key);
    http_config.api_key = derived_key;
    log("API key synced from identity");

    // ================================================================
    // TRANSFORMER CONFIG + STATE — loaded before state so fields are available
    // ================================================================
    let transformer_config = crate::config::TransformerConfig::load(
        &crate::paths::spf_root().join("LIVE/CONFIG/transformer.json")
    ).unwrap_or_default();

    let transformer = if transformer_config.enabled {
        log("Transformer: enabled — initializing runtime state");
        let mut state = crate::transformer_tools::TransformerState::from_config(
            &transformer_config, "writer" // BUGSfix: was writer_checkpoint (filename), needs role string
        );
        // RC-2: Load checkpoint if available (same pattern as worker.rs init_transformer)
        let ckpt_path = crate::paths::spf_root()
            .join("LIVE/MODELS")
            .join(&transformer_config.writer_checkpoint);
        if ckpt_path.exists() {
            match std::fs::read(&ckpt_path) {
                Ok(data) => match crate::checkpoint::deserialize_weights(&data) {
                    Ok((weights, meta)) => {
                        let mut model_weights = state.model.weights_mut();
                        match crate::checkpoint::apply_weights(&mut model_weights, &weights) {
                            Ok(()) => {
                                log(&format!("Transformer: checkpoint loaded — model={}, step={}", meta.model_id, meta.step));
                                state.training_step = meta.step; // RC-2: restore step counter
                            }
                            Err(e) => log(&format!("Transformer: checkpoint shape mismatch — {}, using random weights", e)),
                        }
                        state.last_checkpoint = ckpt_path.to_string_lossy().to_string();
                    }
                    Err(e) => log(&format!("Transformer: checkpoint corrupt — {}, using random weights", e)),
                },
                Err(e) => log(&format!("Transformer: checkpoint read failed — {}, using random weights", e)),
            }
        }

        // Load checkpoint manifest for session recovery context
        let manifest_path = spf_root().join("LIVE/MODELS/checkpoint_manifest.json");
        if manifest_path.exists() {
            if let Ok(data) = std::fs::read(&manifest_path) {
                if let Ok(manifest) = serde_json::from_slice::<serde_json::Value>(&data) {
                    if let Some(step) = manifest.get("training_step").and_then(|v| v.as_u64()) {
                        log(&format!("Recovery: manifest loaded — last step={}, checkpoint={}",
                            step,
                            manifest.get("checkpoint").and_then(|v| v.as_str()).unwrap_or("?")
                        ));
                    }
                }
            }
        }
        Some(std::sync::Arc::new(std::sync::RwLock::new(state)))
    } else {
        log("Transformer: disabled (set enabled: true in LIVE/CONFIG/transformer.json)");
        None
    };

    // ================================================================
    // MESH CONFIG + CHANNEL — created before state so mesh_tx is available
    // ================================================================
    let mesh_config = crate::config::MeshConfig::load(
        &crate::paths::spf_root().join("LIVE/CONFIG/mesh.json")
    ).unwrap_or_default();

    let (mesh_tx, mut mesh_rx) = if mesh_config.enabled {
        let (tx, rx) = crate::mesh::create_mesh_channel();
        (Some(tx), Some(rx))
    } else {
        (None, None)
    };

    // ================================================================
    // SHARED STATE — used by both stdio and HTTP transports
    // ================================================================
    let (listeners, collector_arc) = build_listeners(&config, &transformer_config);

    // Wire collector into TransformerState so handle_train() can drain signals.
    // Matches run_worker() wiring pattern (lines 3526-3532).
    // Option guard: Serve mode transformer is Option<Arc<...>>,
    // Worker mode is bare Arc<...> — this handles both.
    if let Some(ref collector) = collector_arc {
        if let Some(ref t_lock) = transformer {
            let mut t_state = t_lock.write().unwrap();
            t_state.collector = Some(collector.clone());
            log("Collector wired to TransformerState (Serve mode)");
        }
    }

    // ================================================================
    // NETWORK POOL — load config, init PoolState if NetAdmin
    // ================================================================
    let network_config = crate::config::NetworkConfig::load(
        &crate::paths::spf_root().join("LIVE/CONFIG/network.json")
    ).unwrap_or_default();

    let pool_state = if network_config.is_netadmin() {
        let cap = network_config.effective_pool_size();
        log(&format!("Network: NetAdmin role — initialising pool ({} workers max)", cap));
        Some(crate::network::PoolState::new(&network_config.peers, cap))
    } else {
        log("Network: Worker role — pool management delegated to NetAdmin");
        None
    };
    let role_str = if network_config.is_netadmin() { "netadmin" } else { "worker" };
    crate::network::log_startup_status(&network_config.peers, role_str);

    let state = Arc::new(ServerState {
        config,
        config_db,
        session: Mutex::new(session),
        storage,
        tmp_db,
        agent_db,
        fs_db,
        pub_key_hex,
        trusted_keys,
        auth_mode: http_config.auth_mode.clone(),
        nonce_cache: Mutex::new(std::collections::HashMap::new()),
        listeners,
        mesh_tx,
        peers,
        transformer,
        transformer_config,
        pipeline: std::sync::Arc::new(std::sync::Mutex::new(crate::pipeline::PipelineState::new())),
        signing_key: signing_key.clone(),
        network_config,
        pool_state,
        browser: std::sync::Mutex::new(crate::browser::BrowserSession::new()),
        ws_browser_channels: std::sync::Mutex::new(None),
        http_port: http_config.port,
        tracked_peers: std::sync::Mutex::new(std::collections::HashMap::new()),
        orchestrator_state: std::sync::Mutex::new(None),
        endpoint: std::sync::Mutex::new(None),
        tokio_handle: std::sync::Mutex::new(None),
    });

    // Spawn FLINT Memory Router — AFTER ServerState (needs Arc<ServerState> for dispatch::call)
    if let Some(ref collector) = collector_arc {
        crate::flint_memory::start_memory_router(
            collector.clone(), state.transformer.clone(), state.clone()
        );
        log("FLINT Memory Router started (MB-FR/MB-FT) with auto-train + metrics");
    }

    // Spawn HTTP server if transport is "http" or "both"
    if http_config.transport != "stdio" {
        if http_config.api_key.is_empty() && state.trusted_keys.is_empty() {
            log("HTTP: No API key and no trusted keys. Falling back to stdio only.");
        } else {
            // Generate or load TLS certs if TLS is enabled
            let tls = if http_config.tls_enabled {
                let config_dir = crate::paths::spf_root().join("LIVE/CONFIG");
                let cert_path = config_dir.join(&http_config.tls_cert);
                let key_path = config_dir.join(&http_config.tls_key);
                if !cert_path.exists() || !key_path.exists() {
                    // I-3 FIX: Bind TLS cert to Ed25519 identity
                    // CN includes pubkey prefix for auditability + clone safety
                    let cn = format!("spf-{}", &state.pub_key_hex[..16]);
                    let san_names = vec!["localhost".to_string(), cn.clone()];
                    let ck = rcgen::generate_simple_self_signed(san_names)
                        .expect("Failed to generate TLS certificate");
                    if let Some(parent) = cert_path.parent() {
                        std::fs::create_dir_all(parent).ok();
                    }
                    std::fs::write(&cert_path, ck.cert.pem()).ok();
                    std::fs::write(&key_path, ck.key_pair.serialize_pem()).ok();
                    log("Generated self-signed TLS certificate");
                }
                match (std::fs::read(&cert_path), std::fs::read(&key_path)) {
                    (Ok(cert), Ok(key)) => Some((cert, key)),
                    _ => {
                        log("WARNING: Failed to read TLS cert/key files. Starting without TLS.");
                        None
                    }
                }
            } else {
                None
            };
            let scheme = if tls.is_some() { "HTTPS" } else { "HTTP" };
            let http_state = Arc::clone(&state);
            let http_port = http_config.port;
            let http_bind = http_config.bind.clone();
            let http_api_key = http_config.api_key.clone();

            // ================================================================
            // SHARED TOKIO RUNTIME — HTTP + Mesh in 1 thread (E7)
            // ================================================================
            if mesh_config.enabled {
                let mesh_state = Arc::clone(&state);
                let mesh_signing_key = signing_key.clone();
                let mesh_cfg = mesh_config.clone();
                let mesh_receiver = mesh_rx.take().expect("mesh_rx must exist when mesh is enabled");

                std::thread::spawn(move || {
                    let rt = tokio::runtime::Builder::new_multi_thread()
                        .enable_all()
                        .build()
                        .expect("Failed to create shared tokio runtime");

                    rt.block_on(async {
                        // HTTP as async task — uses serve() (no internal runtime)
                        let http_task = tokio::spawn(crate::http::serve(
                            http_state, http_bind, http_port, http_api_key, tls,
                        ));

                        // Mesh as async task — same runtime, shared thread pool
                        let mesh_task = tokio::spawn(crate::mesh::run(
                            mesh_state, mesh_signing_key, mesh_cfg, mesh_receiver,
                        ));

                        // Both run concurrently — if either exits, log it
                        tokio::select! {
                            r = http_task => {
                                if let Err(e) = r {
                                    eprintln!("[SPF] HTTP task exited: {}", e);
                                }
                            }
                            r = mesh_task => {
                                if let Err(e) = r {
                                    eprintln!("[SPF] Mesh task exited: {}", e);
                                }
                            }
                        }
                    });
                });

                log(&format!("{} API started on {}:{}", scheme, http_config.bind, http_port));
                log(&format!("Mesh started | Role: {} | Team: {} | Discovery: {}",
                             mesh_config.role, mesh_config.team, mesh_config.discovery));
                log("Shared runtime: HTTP + Mesh in 1 thread, 1 tokio runtime");
            } else {
                // Mesh disabled — HTTP runs alone with its own runtime
                std::thread::spawn(move || {
                    crate::http::start(http_state, &http_bind, http_port, http_api_key, tls);
                });
                log(&format!("{} API started on {}:{}", scheme, http_config.bind, http_port));
            }
        }
    }

    // ================================================================
    // MESH NETWORK — standalone (only when HTTP is disabled)
    // Normally mesh runs in shared runtime above with HTTP.
    // This path handles: mesh enabled but HTTP disabled (stdio-only + mesh).
    // ================================================================
    if mesh_config.enabled && http_config.transport == "stdio" {
        let mesh_state = Arc::clone(&state);
        let mesh_signing_key = signing_key.clone();
        let mesh_cfg = mesh_config.clone();
        let mesh_receiver = mesh_rx.take().expect("mesh_rx must exist when mesh is enabled");
        std::thread::spawn(move || {
            tokio::runtime::Builder::new_multi_thread()
                .enable_all()
                .build()
                .expect("Failed to create mesh tokio runtime")
                .block_on(crate::mesh::run(mesh_state, mesh_signing_key, mesh_cfg, mesh_receiver))
        });
        log(&format!("Mesh started (standalone) | Role: {} | Team: {} | Discovery: {}",
                     mesh_config.role, mesh_config.team, mesh_config.discovery));
    } else if !mesh_config.enabled {
        log("Mesh disabled (set enabled: true in LIVE/CONFIG/mesh.json)");
    }

    // Init voice team channels from config (idempotent)
    crate::voice::init_voice_teams();

    // Init in-process brain (MiniLM-L6-v2 + LMDB) — replaces subprocess brain
    crate::brain_local::init_brain();
    crate::brain_local::index_knowledge_docs();
    crate::brain_local::index_spf_sources();

    // Run stdio loop if transport is "stdio" or "both"
    if http_config.transport != "http" {
    let stdin = io::stdin();
    for line in stdin.lock().lines() {
        let line = match line {
            Ok(l) => l,
            Err(e) => {
                log(&format!("stdin read error: {}", e));
                continue;
            }
        };

        let line = line.trim().to_string();
        if line.is_empty() {
            continue;
        }

        let msg: Value = match serde_json::from_str(&line) {
            Ok(v) => v,
            Err(e) => {
                log(&format!("JSON parse error: {}", e));
                continue;
            }
        };

        let method = msg["method"].as_str().unwrap_or("");
        let id = &msg["id"];
        let params = &msg["params"];

        log(&format!("Received: {}", method));

        match method {
            "initialize" => {
                send_response(id, json!({
                    "protocolVersion": PROTOCOL_VERSION,
                    "capabilities": { "tools": {} },
                    "serverInfo": {
                        "name": SERVER_NAME,
                        "version": SERVER_VERSION,
                    }
                }));
            }

            "notifications/initialized" => {
                // No response needed
            }

            "tools/list" => {
                send_response(id, json!({ "tools": tool_definitions() }));
            }

            "tools/call" => {
                let name = params["name"].as_str().unwrap_or("");
                let args = params.get("arguments").cloned().unwrap_or(json!({}));

                cmd_log(&format!("CALL {} | {}", name, param_summary(name, &args)));

                // FL-1B: Stdio routes through dispatch::call() like all transports.
                // dispatch::call() handles: source-aware lock (FL-1A), gate, execution,
                // FLINT intercept (FL-1C), listener notification — one path, all transports.
                // Block BB listener bridge REMOVED — dispatch handles listener notification.
                let response = crate::dispatch::call(&state, crate::dispatch::Source::Stdio, name, &args);

                // Log failures — Block T: canonical _blocked field
                let blocked = response.result.get("_blocked").and_then(|v| v.as_bool()).unwrap_or(false);
                if blocked {
                    let text = response.result.get("text").and_then(|v| v.as_str()).unwrap_or("");
                    let snippet: String = text.chars().take(200).collect();
                    cmd_log(&format!("FAIL {} | {}", name, snippet));
                }

                send_response(id, json!({
                    "content": [response.result]
                }));
            }

            "ping" => {
                send_response(id, json!({}));
            }

            _ => {
                if !id.is_null() {
                    send_error(id, -32601, &format!("Unknown method: {}", method));
                }
            }
        }
    }
    // Graceful shutdown: save final checkpoint if transformer is enabled (stdio mode)
    if let Some(transformer_arc) = &state.transformer {
        if let Ok(state_guard) = transformer_arc.try_read() {
            let mut worker_cfg = crate::worker::WorkerConfig::default();
            worker_cfg.role = state_guard.role.clone();
            match crate::worker::save_checkpoint(&state_guard, &state.transformer_config, &worker_cfg) {
                Ok(path) => {
                    log(&format!("Shutdown: checkpoint saved to {}", path));
                    let manifest = serde_json::json!({
                        "checkpoint": path,
                        "saved_at": chrono::Utc::now().to_rfc3339(),
                        "training_step": state_guard.training_step,
                        "session_log": "LIVE/SESSION/cmd.log",
                        "agent_state_db": "LIVE/LMDB5/LMDB5.DB",
                        "brain_dir": "LIVE/BRAIN/DOCS/",
                        "status_file": "PROJECTS/PROJECTS/STATUS.txt"
                    });
                    let manifest_path = spf_root().join("LIVE/MODELS/checkpoint_manifest.json");
                    if let Ok(json) = serde_json::to_string_pretty(&manifest) {
                        if let Err(e) = std::fs::write(&manifest_path, json) {
                            log(&format!("Shutdown: manifest write failed — {}", e));
                        } else {
                            log(&format!("Shutdown: manifest written to {:?}", manifest_path));
                        }
                    }
                }
                Err(e) => log(&format!("Shutdown: checkpoint save failed — {}", e)),
            }
        } else {
            log("Shutdown: skipping checkpoint save — transformer busy (training in progress)");
        }
    }
    } else {
        // HTTP-only mode: park main thread (HTTP server runs in spawned thread)
        log("Transport mode: http-only. Stdio disabled. Main thread parked.");
        loop { std::thread::park(); }
    }
}