#392 · Developer Tool

Codeowners Pattern Tester

Check which CODEOWNERS rule wins for a set of repository paths. Paste rules above the separator and paths below it. The tester applies rules from top to bottom, reports the last match, and shows unowned files so you can spot gaps before committing the file.

Developer Input

CODEOWNERS and paths
Ad space

How to use this developer tool

  1. Paste your input or load the provided sample.
  2. Adjust any options shown beneath the editor.
  3. Select Test Patterns or press Ctrl/Cmd + Enter.
  4. Review the summary, diagnostics, and exported output before committing it.

What this developer tool does

Patterns are converted to anchored path matchers with CODEOWNERS-style directory and wildcard handling. For every path, the last matching non-comment rule supplies the owners.

Patterns are converted to anchored path matchers with CODEOWNERS-style directory and wildcard handling. For every path, the last matching non-comment rule supplies the owners.

Rule order matters. A broad rule placed later can replace ownership assigned by an earlier, narrower rule.

Example

Try the sample input built into the page. The result uses the same validation and export path as pasted content.

* @platform
/docs/ @docs-team
*.js @javascript-team
/src/admin/ @security-team
--- PATHS ---
src/app.js
docs/guide.md
src/admin/panel.js

Use cases

  • Prepare repository configuration during project setup.
  • Review a proposed change before opening a pull request.
  • Turn issue or workflow data into a consistent, copy-ready artifact.

Tips for reliable output

  • Start with the sample to confirm the expected shape.
  • Keep repository names, paths, and owner handles exact.
  • Read warnings even when output is generated.
  • Commit configuration changes in a separate pull request when practical.
  • Test critical automation on a non-production branch first.

Processing details

The matcher supports *, **, ?, root-anchored patterns, directory patterns, and basename patterns without a slash.

GitHub has a few edge cases around escaped spaces and unusual filenames; confirm critical rules in a test repository.

Frequently asked questions

What input does the Codeowners Pattern Tester accept?

Use the format shown in the sample. The page validates required fields and reports malformed lines or values before producing output.

Does the Codeowners Pattern Tester contact GitHub or another server?

No. Processing happens in your browser and the core function makes no network request.

Can I use the generated output in a repository?

Yes, after reviewing repository-specific names, permissions, paths, and policies that a browser-only tool cannot verify.

Why might GitHub interpret the result differently?

Hosted services may apply repository context, current platform rules, presets, or permissions that are unavailable to this local check.

Can the Codeowners Pattern Tester process Unicode text?

Yes. The input and downloaded files use UTF-8, although the target format may impose narrower naming or syntax rules.

Output reference

ItemMeaning
OutputCopy-ready TXT or text
ProcessingLocal browser execution
NetworkNot required

Git & Repository Tools

Browse generators, parsers, validators, and helpers for Git configuration and repository workflows.

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