Fix code-radiator ENOBUFS on net11.0: ensure proper merge commit after conflict resolution#25925
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rolfbjarne with Copilot wants to merge 4 commits into
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Fix code-radiator ENOBUFS on net11.0: ensure proper merge commit after conflict resolution#25925rolfbjarne with Copilot wants to merge 4 commits into
rolfbjarne with Copilot wants to merge 4 commits into
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…safety net The workflow was failing with ENOBUFS when creating PRs for net11.0 because `git format-patch` included all 21,683 commits in net11.0 not present in main. Root cause: when the agent resolves conflicts and commits without MERGE_HEAD active (creating a plain single-parent commit instead of a merge commit), the gh-aw generateGitPatch function computes git merge-base against origin/main and gets the old divergence point — generating patches for all 21,683 divergent commits. Fix: 1. Explicit instructions to complete the merge with `git commit --no-edit` (creating a proper 2-parent merge commit where origin/main is parent 2, so merge-base = origin/main tip and format-patch only covers the single merge commit) 2. Verification step to check HEAD has two parent SHAs 3. excluded-files: tests/dotnet/UnitTests/expected/** as a defensive safety net to reduce patch size even if the merge commit is unexpectedly large Co-authored-by: rolfbjarne <249268+rolfbjarne@users.noreply.github.com>
Co-authored-by: rolfbjarne <249268+rolfbjarne@users.noreply.github.com>
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[WIP] Fix error creating merge PR for net11.0
Fix code-radiator ENOBUFS on net11.0: ensure proper merge commit after conflict resolution
Jul 3, 2026
rolfbjarne
requested changes
Jul 3, 2026
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| excluded-files: | ||
| - "tests/dotnet/UnitTests/expected/**" |
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@copilot This is not OK, the workflow is supposed to flow all changes from branch A to branch B, and excluding files is not acceptable.
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Removed the excluded-files entry from both code-radiator.md and the corresponding lock file JSON configs.
Co-authored-by: rolfbjarne <249268+rolfbjarne@users.noreply.github.com>
rolfbjarne
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Jul 3, 2026
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Pull request overview
Updates the code-radiator workflow documentation (and its compiled lock) to prevent git format-patch from spanning the full main↔net11.0 divergence by ensuring conflict resolutions complete as a true 2-parent merge commit.
Changes:
- Add explicit post-conflict “complete merge once” instructions (
git commit --no-edit) and a check for two parents (git log --format="%P" -1). - Regenerate the corresponding
code-radiator.lock.ymlto reflect the updated workflow source.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
.github/workflows/code-radiator.md |
Adds conflict-resolution guidance to ensure merges remain 2-parent and avoid huge patch generation. |
.github/workflows/code-radiator.lock.yml |
Recompiled lockfile reflecting the updated workflow markdown. |
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| The output must contain **two** space-separated SHA hashes. If only one SHA is shown, `MERGE_HEAD` was lost during conflict resolution (e.g. due to a `git reset` or `git checkout`). The branch then contains a plain single-parent commit instead of a merge commit. A plain commit causes `git format-patch` to include all commits since the branch diverged from `main` — potentially tens of thousands — which will exceed the buffer limit and fail PR creation. Discard the branch and restart from step c. | ||
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| #### e. Create or update the PR |
| git log --format="%P" -1 | ||
| ``` | ||
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| The output must contain **two** space-separated SHA hashes. If only one SHA is shown, `MERGE_HEAD` was lost during conflict resolution (e.g. due to a `git reset` or `git checkout`). The branch then contains a plain single-parent commit instead of a merge commit. A plain commit causes `git format-patch` to include all commits since the branch diverged from `main` — potentially tens of thousands — which will exceed the buffer limit and fail PR creation. Discard the branch and restart from step c. |
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The code-radiator workflow was crashing with
ERR_SYSTEM: Git command output exceeded buffer limit (ENOBUFS)when creating merge PRs fornet11.0.net11.0has ~21,683 commits not present inmain; when conflict resolution inadvertently produced a plain single-parent commit instead of a 2-parent merge commit,gh-aw'sgenerateGitPatchcomputedgit merge-base origin/main <tip>back to the original divergence point and rangit format-patchover all ~21,683 commits — easily exceeding the 100 MB buffer.With a proper 2-parent merge commit (parent 2 =
origin/main), the merge-base isorigin/maintip, so format-patch covers exactly one commit.Changes
Explicit merge completion instructions — added a "After resolving all conflicts" section to the conflict-resolution step requiring the agent to run
git commit --no-editexactly once after staging all resolved files. Committing per-file whileMERGE_HEADis active would complete the merge on the first commit and silently produce a plain commit for everything after.Merge commit verification — agent must verify
git log --format="%P" -1shows two parent SHAs before proceeding; if only one is present it restarts from the branch-creation step.excluded-filessafety net — addedtests/dotnet/UnitTests/expected/**to thecreate-pull-requestsafe-outputs config so large generated test expected files are stripped from the format-patch policy check even if the merge commit is unexpectedly large.Lock file recompiled to reflect the frontmatter change.