Orchestrata Ultimate › Sessions › Session 266
Session 266
| Field | Value |
|---|---|
| Session | 266 |
| Date | 2026-08-20 07:07 |
| Model | Claude Opus 5 |
| Length | auto-closed |
| Tag | — |
| Source | archive (context.history.md) |
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Prose pending.
Purpose
Context-injection correctness and the contention guard: make an overrun report itself, and stop the guard denying the observation it demands
Objectives
- A module-context render that overruns must be distinguishable from a module with nothing to say
- An edit must never stall on a cold render, and must stay retryable afterwards
- The contention guard must never deny a read-only observation of the run it protects
Work log
- Made a module-context overrun report itself instead of vanishing into an empty string
- _run_module_context re-raises subprocess.TimeoutExpired; before, a timeout and 'this module has no context' both returned '' so a 48.16s render on claude/hooks/test_run_context.py injected nothing and left no trace
- EDIT_TIMEOUT=10 for the edit route (cold render measured 8.71s, warm 0.08s) vs MODULE_TIMEOUT=30 for the Agent route, which runs once per dispatch
- On overrun the edit path emits an UNAVAILABLE block, starts a detached warm render (start_new_session=True), and does NOT record the ledger key so the next edit renders again and collects the warm cache
- _warm_module_context deliberately has no try/except: a failed spawn is a real condition and main()'s boundary already keeps a hook from breaking the tool call
- Collapsed three inlined copies of the PreToolUse response envelope into one _emit writer
- Claude Code reads nothing if hookEventName is absent or misspelled, and it fails silently with the hook still exiting 0 — three copies is three chances to drift
- Fixed two more contention-guard false positives — the guard was denying the observation discipline it exists to enforce
- Shell keywords are not commands: _is_observation took words[0], so 'until ! pgrep ...; do sleep 5; done' failed on 'until' and its body on 'do'. Every wait-loop was denied, and a wait-loop is exactly how the platform conventions say to wait for a run instead of waiting blind
- A quoted pipe split a segment: re.split cut inside quotes, so a pgrep pattern containing '|' became a second segment whose first word was not a tool — observing a run was denied because the pattern NAMING it had a pipe
- Fix mirrors the existing VAR=value skip: _segments() splits only outside quotes, _SHELL_KEYWORDS stepped over before the command word is read — which is then STILL checked, so heavy work behind 'time' or inside a loop body stays denied
- Verified 12/12 across an allow corpus AND a deny corpus; the deny half is load-bearing because a skip that stopped checking would make 'time <anything>' a universal bypass
Decisions
- Fixed the guard rather than overriding it, and kept a deny corpus beside the allow corpus: A guard that obstructs ordinary work gets disabled, and a disabled guard stops nothing — so a false positive is a defect in the guard, not something for the user to route around. But relaxing the matcher without proving the heavy cases still deny would trade four small false positives for one total bypass
Achievements
- Shipped context-injection fix to prod @ ee16d5fd83a6 — overruns now report themselves, EDIT_TIMEOUT=10, detached warm render, ledger stays retryable; 461 tests green on the affected set (18/18 modules, 29s), blast radius correctly measured from the last verified tree 643655bc
- Shipped contention-guard fix to prod @ 8eca8b7ab195 — quote-aware segment splitting and shell-keyword skipping; wait-loops and quoted-pipe pgrep patterns no longer denied, heavy work behind time/loops still denied; 438 tests green (17/17 modules)
- Documented both hooks in the wiki for the first time: claude/hooks/task_context_hook and claude/hooks/test_run_context, linked from claude/hooks/index — they were the only undocumented hooks among ~30, and are the two that decide what context reaches a change and what may run beside a measured suite
- (auto-closed by new session)
Handoff
- Key decisions: A timeout and 'nothing to say' must not share one representation — _run_module_context raises rather than returning '', A guard false positive is a defect in the guard, never something to override around; but relax the matcher only with a deny corpus proving heavy cases still deny, The edit route deliberately emits NO permissionDecision — returning 'allow' would short-circuit the permission prompt for every edit as a side effect of adding context
- Blockers: None
- In-progress: Full authoritative suite still owed: both ships this session used --affected subsets (461 and 438 tests), which are explicitly non-authoritative
- Important files: claude/hooks/task_context_hook.py, claude/hooks/test_run_context.py, tests/claude/test_test_run_context.py
- Commands: bash deploy/ship.sh, .venv/bin/python claude/scripts/gen_plugin.py
- Warnings: reports/.ship-verified is the blast-radius base — the affected set is measured from the last VERIFIED commit, not origin/master...HEAD, which is empty once pushed and silently degrades to a smoke floor, gen_plugin.py must be re-run after ANY claude/hooks change or ship fails the plugin-drift gate; the plugin cache is what actually executes, not the repo file