[deep-report] Investigate: deep-report repo-memory has not persisted since 2026-09-08 #66661

Description: This DeepReport workflow's own repo-memory files (memory/deep-report branch, path deep-report/*.md) have not been updated since 2026-09-08, even though at least 11+ DeepReport cycles have run since then (confirmed via discussion history — the most recent prior cycle, #66576, ran 2026-10-07T12:53Z and itself noted "the recurring memory-write-race pattern"). This means every recent cycle has had to fall back to reconstructing its baseline from the live discussions feed instead of from last_analysis_timestamp.md/known_patterns.md/trend_data.md/flagged_items.md, defeating the purpose of persistent repo-memory. This is distinct from the already-tracked nested-subdir glob bug (#66253), since deep-report writes flat files at the repo-memory root.

Expected Impact: Restores actual cross-cycle memory for the highest-context DeepReport workflow, eliminating the reconstruction tax every cycle currently pays and the risk that the stale files silently mislead a cycle that trusts them instead of re-deriving ground truth.

Suggested Agent: Copilot coding agent — investigate the repo-memory push step for the deep-report workflow specifically (concurrent writes from overlapping runs, a race on the memory/deep-report branch, or a silent push failure) and add a step-summary assertion that memory was actually committed.

Estimated Effort: Medium (1-4 hours)

Data Source: DeepReport Intelligence Briefing (cycle 12) — self-observed during Step 0 (repo-memory check): last_analysis_timestamp.md and sibling files all show their most recent entry as 2026-09-08, confirmed against live discussion history showing cycles through 2026-10-07.

Generated by 🔬 Deep Report · claude · agent · 274.9 AIC · ⌖ 8.85 AIC · ⊞ 7.1K · ◷

• expires on Oct 9, 2026, 10:48 AM UTC-08:00