feat(repositories): add delete_branch tool#2790
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The repositories toolset exposes create_branch and list_branches but provides no way to delete a branch. This adds a delete_branch tool that fills that gap, following the existing create_branch implementation. As a guardrail, the tool fetches the branch first and refuses to delete protected branches, returning a clear error to the model instead of attempting the deletion. It requires owner, repo, and branch, is scoped to `repo`, and is annotated as a non-read-only operation. Tests cover successful deletion, protected-branch refusal, branch not found, and deletion failure. Closes github#1476
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Description
Adds a
delete_branchtool to the repositories toolset, resolving #1476.The repo already exposes
create_branchandlist_branchesbut had no way to delete a branch. This fills that gap, following the existingcreate_branchimplementation pattern.Guardrail
As requested in the issue, the tool will not delete a protected branch. It fetches the branch first and, if
protectedis true, returns a tool error rather than attempting the deletion — giving the model actionable feedback.Behavior
delete_branchowner,repo,branchReadOnlyHintfalserepoFlow:
GET /repos/{owner}/{repo}/branches/{branch}→ check protection statusDELETE /repos/{owner}/{repo}/git/refs/heads/{branch}Testing
Test_DeleteBranchcovers:Verified locally:
go test ./...— passgolangci-lint run— 0 issuesscript/generate-docs— README updatedUPDATE_TOOLSNAPS=true go test ./...— snapshot committedChecklist
script/lintpassespkg/github/__toolsnaps__/delete_branch.snap)script/generate-docsCloses #1476