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Upstream brings: - 12.2.1: Break infinite summary-retry loop (#2072) - 12.2.2: Subagent observation labeling + schema migration (#2073) - 12.2.3: Silence parser warning on normal observation responses (#2074) - 12.3.0: Docker harness + SWE-bench eval harness (#2076) - 12.3.1: Error handling anti-pattern cleanup across 91 files (#2078) Local fixes preserved through merge: - env-sanitizer PATH extension for claude CLI lookup - SessionStore stale session reset (mac sleep / 4h wall-clock) Built artifacts rebuilt from merged sources; fixes verified present in worker-service.cjs. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>