Wave 2's PR-9, whose authority is "mechanical PR" and which is gated on no
ruling. Widened by the 2026-07-28 triage from the accrual guard alone to all
three broad `except` blocks on the turn spine.
Each guard is DELIBERATE and stays: accrual is additive and must never crash a
turn; a pack/catalog failure must not take down logos authority; a probe
failure must not touch the served surface. Narrowing them to ImportError/
OSError — as an external assessment proposed — would convert a malformed
decision object into a turn-spine crash, trading silent failure for
served-surface failure. What was wrong is not the tolerance, it is that each
wrote a value INDISTINGUISHABLE FROM ITS HEALTHY CASE:
- a raising read->realize->determine chain left the same None accrual a quiet
turn leaves;
- a logos decision that raised looked exactly like a turn where logos was
never consulted (both: logos_decision_kind == "");
- a crashed geometric probe recorded the same empty neighborhood as a probe
that ran and found nothing — in the block whose entire job is producing the
data that prices the anti-unification roadmap.
Silence, in the one layer whose constitution is "failures are typed, never
silent" (INV-34).
chat/runtime.py _accrual_swallows / _last_accrual_error, read via
accrual_swallow_telemetry(). _last_turn_accrual is
still None on failure, so _maybe_surface_determination
returns byte-identically — ADDITIVE BY CONSTRUCTION,
and pinned as such.
cognition/result.py logos_error on CognitiveTurnResult.
cognition/pipeline.py logos_error recorded; probe_error,
neighbor_scan_errors, graph_anti_unify_error on the
OOV telemetry.
tests/test_accrual_swallow_telemetry.py — 7 pins. The two behavioral ones were
OBSERVED RED against a build carrying the fields with the recording stripped,
so they discriminate rather than merely pass. Two test bugs of mine were fixed
along the way (wrong logos module path; CognitiveTurnResult has required
fields) — the tests were wrong, not the code.
Registered in BOTH TEST_SUITES["smoke"] and smoke.yml on creation, per #136.
Local/CI delta verified unchanged at exactly ten (local 25, CI 15, CI-only 0),
so this settles nothing R-14 has to rule.
Cleanup as found: three dead imports removed from chat/runtime.py
(_COGNITION_PACK_ID, _TEACHING_CORPUS_ID, engine_identity_for_config), each
confirmed to have no re-export dependence first — workbench/readers.py imports
engine_identity_for_config straight from core.engine_identity. ruff 4 -> 1 on
these paths; the survivor is a pre-existing structural E402.
Registers: H-11 CLOSED; PR-9 marked LANDED in the plan.
Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wcw2pnMBwyvmNyQg4uPEt4
98a6e8b439