feat(safe-outputs): add patch-format: bundle transport for code-push flows

[Copilot]

create-pull-request and push-to-pull-request-branch use git format-patch/git am which loses merge topology and drops merge-resolution-only content. This adds a bundle transport option using git bundle, which preserves commit graph fidelity, merge commits, authorship, and per-commit messages.

New config field

safe-outputs:
  create-pull-request:
    patch-format: bundle   # "am" (default) | "bundle"
  push-to-pull-request-branch:
    patch-format: bundle

Changes

generate_git_bundle.cjs (new)

• Mirrors the 3-strategy fallback structure of generate_git_patch.cjs
• Full mode (create-pull-request): bundles <baseRef>..<branchName>
• Incremental mode (push-to-pull-request-branch): bundles origin/<branch>..<branch> after fetching remote

safe_outputs_handlers.cjs

• Both PR handlers check patch_format (per-handler config, with global fallback)
• "bundle" → calls generateGitBundle, writes bundle_path to JSONL entry
• "am" (default) → existing generateGitPatch path, writes patch_path — no behavior change

create_pull_request.cjs

• When bundle_path present: skips git am; uses git fetch <bundle> refs/heads/<orig>:refs/heads/<newBranch> to reconstruct the branch, then pushes via pushSignedCommits
• Existing patch path and all fallback-as-issue logic unchanged

push_to_pull_request_branch.cjs

• When bundle_path present: skips git am; fetches bundle into a temp ref, git merge --ff-only to advance the branch, then pushes via pushSignedCommits
• Non-fast-forward error behavior preserved

Go structs / compiler

• PatchFormat string added to CreatePullRequestsConfig and PushToPullRequestBranchConfig (validated enum: am | bundle)
• Serialized as patch_format into the handler JSON config consumed at runtime
• patch-format enum property added to the JSON schema for both create-pull-request and push-to-pull-request-branch

Changeset generator workflow

• changeset.md updated to use patch-format: bundle for its push-to-pull-request-branch config

[!WARNING]

---

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[pelikhan]

@copilot update changeset generator to use bundle mode

[Copilot]

@copilot update changeset generator to use bundle mode

Added changeset .changeset/minor-safe-outputs-patch-format-bundle.md in 9145035.

[pelikhan]

@copilot update changeset generator agentic workflow to use bundle patch format

[Copilot]

@copilot update changeset generator agentic workflow to use bundle patch format

Done in a03c86d. Added patch-format: bundle to the push-to-pull-request-branch config in changeset.md, and also added the patch-format enum field to the JSON schema for both create-pull-request and push-to-pull-request-branch (which was missing and caused a compilation error).

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/graphql
  • Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw manager.md nce.md none.md ilit�� t.md ons-warning.md y.md checker.md (http block)
  • Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw (http block)
  • Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw -embedcfg /tmp/go-build700627530/b295/embedcfg -pack (http block)
• https://api.github.com/repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b
  • Triggering command: /usr/bin/gh gh api /repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b --jq .object.sha logs/user.env (http block)
• https://api.github.com/repos/github/gh-aw
  • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw --jq .visibility org-health-report.md example-permissions-warning.md artifacts-summary.md cli-consistency-/usr/bin/gh craft.md cli-version-checgraphql code-simplifier.-f cons�� workflow-generat-f jsweep.md x_amd64/compile r (http block)
• https://api.github.com/repos/github/gh-aw-actions/git/ref/tags/v0
  • Triggering command: /usr/bin/gh gh api /repos/github/gh-aw-actions/git/ref/tags/v0 --jq .object.sha (http block)
• https://api.github.com/repos/githubnext/agentics/git/ref/tags/
  • Triggering command: /usr/bin/gh gh api /repos/githubnext/agentics/git/ref/tags/# --jq .object.sha or.md (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[github-actions]

❌ Tool validation failed! Agent Container Smoke Test detected missing tools: failed

[github-actions]

📰 BREAKING: Smoke Copilot is now investigating this pull request. Sources say the story is developing...

[github-actions]

🌑 The shadows whisper... Smoke Codex failed. The oracle requires further meditation...

[github-actions]

💫 TO BE CONTINUED... Smoke Claude failed! Our hero faces unexpected challenges...

[github-actions]

📰 DEVELOPING STORY: Smoke Copilot reports failed. Our correspondents are investigating the incident...

[pelikhan]

@copilot update setup.sh https://github.com/github/gh-aw/actions/runs/23650300015/job/68893166596#step:23:1

[Copilot]

@copilot update setup.sh https://github.com/github/gh-aw/actions/runs/23650300015/job/68893166596#step:23:1

Fixed in 3533140. generate_git_bundle.cjs was missing from the SAFE_OUTPUTS_FILES list in setup.sh, causing a MODULE_NOT_FOUND error at runtime when safe_outputs_handlers.cjs tried to require it.