Plan-tune cathedral T4 (per D5/D10). Two Phase 1 design spikes that
downstream tasks (T3, T5, T6, T8, T9) depend on.
claude-code-hook-mutation.md
- Confirms PreToolUse allow + updatedInput is supported and is the right
mechanism for substituting an auto-decided answer.
- Pins stdin/stdout JSON schemas with field-by-field reference.
- Documents matcher regex syntax for "(AskUserQuestion|mcp__.*__AskUserQuestion)"
so Conductor's MCP-routed AUQ is covered.
- Captures parallel-hook merge order caveat and our settings.json snippet.
codex-session-format.md
- Maps the on-disk ~/.codex/sessions/<date>/rollout-*.jsonl schema by
event type (response_item 76%, event_msg 19%, turn_context, session_meta).
- Critical finding: Codex has NO AskUserQuestion tool. Gstack AUQ-shaped
Decision Briefs surface as agent_message text; answer is the next
user_message. Two-tier recovery: marker-first (D18), then pattern
fallback for hash-only logging.
- Confirms logs_2.sqlite is internal telemetry, not session content.
- Lists open questions to answer during T9 implementation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Garry Tan