docs(audit): add commit audit report for 2026-03-10 13:00-16:00 UTC

[kilo-code-bot]

Summary

• Adds a comprehensive audit report (docs/audit-2026-03-10-activation-drop.md) documenting all 36 commits deployed to main between 13:00–16:00 UTC on March 10, 2026.
• The report investigates the root cause of a user activation drop observed between 16:00–19:00 UTC that day, categorizing each commit by risk level with detailed diffs and analysis.
• Three primary suspects identified: Vercel AI Gateway routing change (20% traffic shift + new error-rate fallback), cloud agent wrapper startup changes (1.5s retry delay + pre-flight checks), and GitHub check run app type parameter change.

Verification

• Verified all 36 commits via git log --after/--before against main
• Reviewed full diffs for all high-risk and medium-risk commits
• Cross-referenced commit timestamps (author timezone) with UTC window
• Confirmed all commits in the window were merged to main

Visual Changes

N/A

Reviewer Notes

• The report uses author timestamps (%aI) which include timezone offsets. All commits listed fall within the 13:00–16:00 UTC window when timezone-adjusted.
• The "Low-Risk" table uses the UTC-converted time for consistency.
• The existing audit/commits-2025-03-10-1300-1600-utc branch appears to be a prior audit with the wrong year in the branch name. This branch uses the correct year (2026).

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• docs/audit-2026-03-10-activation-drop.md

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_{Reviewed by gpt-5.4-20260305 · 172,616 tokens}