Add permissionMode to code-writing agents#4174
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #4174 +/- ##
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Coverage 69.29% 69.29%
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Files 466 466
Lines 46774 46774
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Agents with Write and Edit tools but no permissionMode inherit the parent's default mode, which requires interactive approval for each file operation. When running as subprocesses the prompts get auto-denied, causing agents to create _new.go copies instead of editing files in place. Set permissionMode: acceptEdits on all four code-writing agents and update the golang-code-writer description and prompt to explicitly prefer editing existing files over creating new ones. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Mar 17, 2026
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Summary
_new.gofile copies instead of editing existing files in place. The root cause is that agents withoutpermissionModeinherit the parent'sdefaultmode, which requires interactive approval for each Edit/Write operation. When running as subprocesses, those prompts get auto-denied, so the agent falls back to creating new files as a workaround.permissionMode: acceptEditsto all four code-writing agents so file modifications are auto-approved._new.gocopies.Type of change
Test plan
Verified by inspecting the agent frontmatter to confirm
permissionMode: acceptEditsis present in all four agents. The fix addresses a runtime permission behavior — the agents will now auto-approve Edit/Write operations instead of falling back to creating new files.Changes
.claude/agents/golang-code-writer.mdpermissionMode: acceptEdits, update description to cover editing existing code, add "File Modification Rules" section.claude/agents/unit-test-writer.mdpermissionMode: acceptEdits.claude/agents/site-reliability-engineer.mdpermissionMode: acceptEdits.claude/agents/documentation-writer.mdpermissionMode: acceptEditsDoes this introduce a user-facing change?
No direct user-facing change. Improves Claude Code agent behavior so code-writing agents edit files in place instead of creating
_new.gocopies.Generated with Claude Code