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P1: bash/shell tool name mismatch. PhasePolicy whitelist used "bash" but
ShellTool registers as "shell". The bash_command_filter was dead code
(never matched the real tool name). Fixed in phase.py whitelist,
react.py filter check, agentkit.yaml config, and all tests.
P1: AdvancePhaseTool missing import in tools/__init__.py. Was in
__all__ but never imported. Added the import.
P2: chat.py phase policy error message echoed verbatim to WS client.
Truncated to 200 chars to match nearby error paths and avoid leaking
config internals.
P2: policy_from_config rebuilt PhasePolicy 3x via full-field copy.
Replaced with dataclasses.replace() so new PhasePolicy fields are not
silently dropped in future reconstructions.
ce-code-review (mode:agent) step of LFG pipeline.
Remove over-engineered _previous_value static method that did index
math on a hardcoded phase list. Instead, capture the previous phase
before the transition — clearer intent, fewer lines, same behavior.
ce-simplify-code step of LFG pipeline.
- PLAN_EXEC branch builds PhasePolicy from ServerConfig.plan_exec
- Empty config → default_policy(); enabled=False → falls back to REACT
- Bad config → error event sent, returns early (no engine constructed)
- ReActEngine created with phase_policy; AdvancePhaseTool registered
- phase_changed events emitted on phase transitions (PLAN_EXEC only)
- REST send_message with execution_mode=plan_exec → HTTP 501 (KTD4)
- REWOO/REFLEXION/TEAM_COLLAB still fall back to REACT (no regression)
- 9 unit tests covering REST 501, characterization, happy path, edge cases, error path, phase_changed events
- SymbolExtractor protocol + SymbolSpan dataclass
- AstSymbolExtractor for Python (stdlib ast, no tree-sitter dep — KTD1)
- RegexSymbolExtractor for TS/JS/Go/Rust/Java (language-aware regex)
- ReadFileTool with path/symbol/start_line/end_line params
- symbol=None returns full file (characterization baseline matching _FakeTool)
- symbol='foo' returns first matching symbol's line range
- symbol not found returns available_symbols list (soft error)
- Unsupported extension returns full file with note
- Manual start_line/end_line overrides symbol
- 66 unit tests covering R22/R23 + characterization + edge cases
chiguyong