feat: conversation log + system prompt overrides (#9)

feat: library API for custom tools, commands, and model override (#8)

feat: add optional Langfuse observability integration (#7)

feat: add safe mode for public hosting (SAFE_MODE=1)

fix: address CodeRabbit review findings

docs: add AGENTS.md convention across all directories

feat: enable natural free-text clarification questions

feat: thinking transparency layer with /verbose command

refactor: rename orchestrators to manager, add architecture boundary tests

refactor: remove specialists, schemas, dummy agent; extract model config

refactor: extract pure tool functions into tools/ module (TUI-independent)

feat: add native agent tools, /tools command, and fix rendering bugs

feat: generalize agent orchestration and externalize prompts to YAML

functional testing