[deep-report] Audit Cluster 5 (container/MCP/infra) PRs closed despite favorable review ("other/unknown", 27% of non-merges)

[github-actions]

Description: Copilot Agent Prompt Clustering Analysis (discussion #57410) manually reviewed the 48 closed-non-merged PRs in the persistently lowest-merge cluster (Cluster 5: container/MCP/infra plumbing, 62.9% merge rate, 3 consecutive days as the outlier). Known categories (WIP/abandoned drafts 41.7%, upstream-blocked scope mismatch 25.0%, review-friction/too-large 6.3%) are already covered by prior pre-filter/stub-detection fixes, but a new 27.1% "other/unknown" bucket (13 PRs) was newly surfaced this cycle: these PRs received clearly favorable triage/review comments yet were still closed rather than merged.

Expected Impact: This is a distinct, previously-unidentified blocker from the already-addressed WIP/upstream-block causes. Understanding why well-reviewed Cluster 5 work still gets closed (duplicate/superseded work, staleness, or manual override) could recover real completed work or reveal a second process gap specific to container/infra PRs.

Suggested Agent: New investigation (PR triage analysis), or the existing Copilot Agent Prompt Clustering Analysis workflow's follow-up

Estimated Effort: Medium (1-4 hours)

Data Source: DeepReport analysis 2026-08-31, sourced from discussion #57410 (Copilot Agent Prompt Clustering Analysis)

Warning

Firewall blocked 2 domains

The following domains were blocked by the firewall during workflow execution:

• api.anthropic.com
• api.github.com

[!TIP]
api.github.com is blocked because GitHub API access uses the built-in GitHub tools by default. Instead of adding api.github.com to network.allowed, use tools.github.mode: gh-proxy for direct pre-authenticated GitHub CLI access without requiring network access to api.github.com:

tools:
  github:
    mode: gh-proxy

See GitHub Tools for more information on gh-proxy mode.

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "api.anthropic.com"
    - "api.github.com"

See Network Configuration for more information.

Generated by 🔬 Deep Report · claude · agent · 191.2 AIC · ⌖ 10.4 AIC · ⊞ 12.4K · ◷

• expires on Sep 2, 2026, 4:44 AM UTC-08:00