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[deep-report] Investigate 4-week decline in Copilot agent PR merge rate (Prompt Clustering trend) #49160

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Description: The Copilot Agent Prompt Clustering Analysis (2026-07-30, 1,000-PR sample spanning ~21 days) reports the merge rate has been declining for four straight weeks, currently at 75.4% (754 merged / 241 closed-without-merge / 5 still open). No prior report has isolated which prompt cluster(s) are driving the decline versus which remain stable — that breakdown is the missing piece needed to act on this trend.

Expected Impact: Identifying the specific cluster(s) responsible for the decline (vs. broad volume growth diluting an otherwise-stable rate) turns a passive trend observation into a targeted prompt/skill fix, directly improving agent PR success rate.

Suggested Agent: Copilot Agent Prompt Clustering Analysis (extend next run with a per-cluster week-over-week merge-rate breakdown) or a new one-off analysis agent

Estimated Effort: Quick (< 1 hour) — data already collected, needs a targeted re-slice by cluster and week

Data Source: DeepReport Intelligence Briefing analysis, 2026-07-30, synthesizing the Copilot Agent Prompt Clustering Analysis report from 2026-07-30.

Generated by 🔬 Deep Report · agent · 163.8 AIC · ⌖ 11.3 AIC · ⊞ 10.8K ·

  • expires on Aug 1, 2026, 7:37 AM UTC-08:00

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