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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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)