feat(B3-v3): clean immutable baseline — #165 SimpleMem/A-MEM/Letta through full fixed-depth pipeline
ADAPT-1 CLOSED. B3-v3 clean baseline on frozen SHA 5a1ad11/v0.64.0.
Zero pipeline modifications during run. Zero manual artifact edits.
Chain: ISSUE(0.16s) → INWARD(0.34s) → OUTWARD(1106s, 12 sources/8 read) →
APPLICABILITY(970s, 10 candidates, INNOVATION_WARRANTED) →
INNOVATION(386s, BUILD, 5 candidates) → ADVERSARIAL(809s after TIMEOUT
retry, 21 attacks, 5 survivors, SURVIVES_WITH_MITIGATIONS) →
SYNTHESIS(444s) → QUALIFY(REFINE_SYNTHESIS ×2 → PROCEED 13/13).
Total wall ~4897s (~82 min) across 12 stage executions.
First-attempt pass: ISSUE, INWARD, APPLICABILITY, INNOVATION, SYNTHESIS v1.
Native retries: OUTWARD (schema-variant normalization), ADVERSARIAL
(stuck process → retry succeeded), SYNTHESIS (2 REFINE_SYNTHESIS loops).
Also fixes OUTWARD artifact resolution: the file-channel path now uses
_resolve_worker_artifact (shared helper) instead of a bespoke check,
so prose-stdout + valid file works correctly (the #165 GATE_RETRY pattern).
1179+ tests pass (baseline suite unchanged).