Deduplicate oversized Code Scanning Fixer patches - #50059
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Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
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[WIP] Add patch-size dedup and backoff to Code Scanning Fixer
Deduplicate oversized Code Scanning Fixer patches
Aug 3, 2026
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PR Triage: #50059
Draft PR, no CI runs yet. Fixes safe-output cap deduplication for Code Scanning Fixer patches. Will re-assess once CI runs and draft is marked ready.
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@copilot do not package lock file changes |
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Pull request overview
Adds oversized-patch preflight and cached alert deduplication to Code Scanning Fixer.
Changes:
- Measures patches against the 4 MB limit.
- Caches oversized outcomes using alert fingerprints.
- Adds restricted shell commands for measurement and cleanup.
Show a summary per file
| File | Description |
|---|---|
.github/workflows/code-scanning-fixer.md |
Adds preflight, deduplication, and cleanup instructions. |
.github/workflows/code-scanning-fixer.lock.yml |
Regenerates the compiled workflow and tool permissions. |
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| ### 7. Create Pull Request | ||
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| Before emitting `create-pull-request`, preflight the complete generated patch, including binary removals: | ||
| - Measure `git diff --binary --no-ext-diff` in bytes. The default `create-pull-request` safe-output limit is 4,096 KB (4,194,304 bytes). |
| - shared/otlp.md | ||
| tools: | ||
| cli-proxy: true | ||
| bash: ["git diff:*", "git restore:*", wc] |
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
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🎉 This pull request is included in a new release. Release: |
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Code Scanning Fixer repeatedly submitted the same ~41 MB binary-removal patch against a 4 MB safe-output cap. Unchanged alerts now avoid repeated remediation attempts after an oversized patch is detected.
Oversized-patch preflight
create-pull-request.noopwhen the patch exceeds 4,096 KB.Persistent alert deduplication
Restricted shell access
git diff,git restore, andwcfor patch measurement and cleanup.{ "alert_number": 123, "fingerprint": "...", "outcome": "patch_too_large", "patch_bytes": 42416128, "max_patch_bytes": 4194304 }