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2415446 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 | """Managed Claude Code subprocess session."""
import asyncio
import os
from collections.abc import AsyncGenerator
from loguru import logger
from free_claude_code.cli.process_registry import (
kill_pid_tree_best_effort,
register_pid,
unregister_pid,
)
from free_claude_code.core.trace import trace_event
from .claude import (
ManagedClaudeConfig,
ManagedClaudeParseState,
ManagedClaudeTaskRequest,
build_managed_claude_invocation,
parse_managed_claude_stdout_line,
)
from .diagnostics import classify_managed_claude_stderr
# Cap stderr capture so a runaway child cannot exhaust memory; pipe is still drained.
_MAX_STDERR_CAPTURE_BYTES = 256 * 1024
class ManagedClaudeSession:
"""Manages a single persistent Claude Code subprocess."""
def __init__(
self,
workspace_path: str,
proxy_root_url: str,
allowed_dirs: list[str] | None = None,
claude_bin: str = "claude",
auth_token: str = "",
*,
log_raw_cli_diagnostics: bool = False,
):
self.config = ManagedClaudeConfig(
workspace_path=os.path.normpath(os.path.abspath(workspace_path)),
proxy_root_url=proxy_root_url,
allowed_dirs=[os.path.normpath(d) for d in (allowed_dirs or [])],
claude_bin=claude_bin,
auth_token=auth_token,
)
self.workspace = self.config.workspace_path
self.proxy_root_url = self.config.proxy_root_url
self.allowed_dirs = self.config.allowed_dirs
self.claude_bin = self.config.claude_bin
self.auth_token = self.config.auth_token
self._log_raw_cli_diagnostics = log_raw_cli_diagnostics
self.process: asyncio.subprocess.Process | None = None
self.current_session_id: str | None = None
self._is_busy = False
self._cli_lock = asyncio.Lock()
self._lifecycle_lock = asyncio.Lock()
self._closed = False
@staticmethod
async def _drain_stderr_bounded(
process: asyncio.subprocess.Process,
*,
max_bytes: int = _MAX_STDERR_CAPTURE_BYTES,
) -> bytes:
"""Read stderr concurrently with stdout to avoid subprocess pipe deadlocks.
Retains at most ``max_bytes`` for logging; any excess is discarded, but
the pipe is read until EOF so a noisy child cannot fill the buffer and
block forever.
"""
if not process.stderr:
return b""
parts: list[bytes] = []
received = 0
while True:
chunk = await process.stderr.read(65_536)
if not chunk:
break
if received < max_bytes:
take = min(len(chunk), max_bytes - received)
if take:
parts.append(chunk[:take])
received += take
# If already at cap, keep reading and discarding until EOF.
return b"".join(parts)
@property
def is_busy(self) -> bool:
"""Check if a task is currently running."""
return self._is_busy
async def start_task(
self, prompt: str, session_id: str | None = None, fork_session: bool = False
) -> AsyncGenerator[dict]:
"""
Start a new task or continue an existing session.
Args:
prompt: The user's message/prompt
session_id: Optional session ID to resume
Yields:
Event dictionaries from the CLI
"""
async with self._cli_lock:
process: asyncio.subprocess.Process | None = None
termination_confirmed = False
try:
async with self._lifecycle_lock:
if self._closed:
raise RuntimeError("Managed Claude session is closed.")
self._is_busy = True
invocation = build_managed_claude_invocation(
config=self.config,
request=ManagedClaudeTaskRequest(
prompt=prompt,
session_id=session_id,
fork_session=fork_session,
),
base_env=os.environ,
)
trace_event(
stage="claude_cli",
event="claude_cli.process.launch",
source="claude_cli",
**invocation.trace_metadata,
)
process = await asyncio.create_subprocess_exec(
*invocation.argv,
stdout=asyncio.subprocess.PIPE,
stderr=asyncio.subprocess.PIPE,
cwd=invocation.cwd,
env=invocation.env,
)
self.process = process
if process.pid:
register_pid(process.pid)
if not process.stdout:
yield {"type": "exit", "code": 1}
return
parse_state = ManagedClaudeParseState(
log_raw_cli_diagnostics=self._log_raw_cli_diagnostics
)
buffer = bytearray()
stderr_task: asyncio.Task[bytes] | None = None
if process.stderr:
stderr_task = asyncio.create_task(
self._drain_stderr_bounded(process)
)
try:
while True:
chunk = await process.stdout.read(65536)
if not chunk:
if buffer:
line_str = buffer.decode(
"utf-8", errors="replace"
).strip()
if line_str:
async for event in self._handle_line_gen(
line_str, parse_state
):
yield event
break
buffer.extend(chunk)
while True:
newline_pos = buffer.find(b"\n")
if newline_pos == -1:
break
line = buffer[:newline_pos]
buffer = buffer[newline_pos + 1 :]
line_str = line.decode("utf-8", errors="replace").strip()
if line_str:
async for event in self._handle_line_gen(
line_str, parse_state
):
yield event
except asyncio.CancelledError:
# Cancelling the handler task should not leave a Claude CLI
# subprocess running in the background.
await asyncio.shield(self.stop())
raise
finally:
stderr_bytes = b""
if stderr_task is not None:
stderr_bytes = await stderr_task
stderr_text = None
if stderr_bytes:
raw_stderr_text = stderr_bytes.decode(
"utf-8", errors="replace"
).strip()
if raw_stderr_text:
diagnostics = classify_managed_claude_stderr(raw_stderr_text)
if diagnostics.has_benign:
logger.info(
"Claude CLI benign stderr diagnostics: lines={}",
len(diagnostics.benign_lines),
)
stderr_text = diagnostics.fatal_text
if stderr_text:
if self._log_raw_cli_diagnostics:
logger.error("Claude CLI stderr: {}", stderr_text)
else:
logger.error(
"Claude CLI stderr: bytes={} text_chars={}",
len(stderr_bytes),
len(stderr_text),
)
logger.info("CLI_SESSION: Yielding error event from stderr")
yield {"type": "error", "error": {"message": stderr_text}}
return_code = await process.wait()
termination_confirmed = True
logger.info(
f"Claude CLI exited with code {return_code}, stderr_present={bool(stderr_text)}"
)
if return_code != 0 and not stderr_text:
logger.warning(
f"CLI_SESSION: Process exited with code {return_code} but no stderr captured"
)
yield {
"type": "exit",
"code": return_code,
"stderr": stderr_text,
}
finally:
self._is_busy = False
if (
process
and process.pid
and (termination_confirmed or process.returncode is not None)
):
unregister_pid(process.pid)
async def _handle_line_gen(
self, line_str: str, parse_state: ManagedClaudeParseState
) -> AsyncGenerator[dict]:
"""Process a single line and yield events."""
for event in parse_managed_claude_stdout_line(line_str, parse_state):
if isinstance(event, dict) and event.get("type") == "session_info":
session_id = event.get("session_id")
if isinstance(session_id, str):
self.current_session_id = session_id
yield event
async def stop(self) -> bool:
"""Stop the CLI process, retaining PID ownership until exit is confirmed."""
async with self._lifecycle_lock:
self._closed = True
process = self.process
if process is None:
return True
if process.returncode is not None:
if process.pid:
unregister_pid(process.pid)
return True
try:
logger.info(f"Stopping Claude CLI process {process.pid}")
kill_pid_tree_best_effort(process.pid)
try:
await asyncio.wait_for(process.wait(), timeout=5.0)
except TimeoutError:
process.kill()
await process.wait()
if process.pid:
unregister_pid(process.pid)
return True
except Exception as e:
if self._log_raw_cli_diagnostics:
logger.error(
"Error stopping process: {}: {}",
type(e).__name__,
e,
)
else:
logger.error(
"Error stopping process: exc_type={}",
type(e).__name__,
)
return False
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