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Source repos

What it gives you — the source_diff tool: turns a manifest-layer change (“image v1.2.2 → v1.2.3”) into the actual code behind it — commit subjects, a per-file diffstat, and the largest changed hunks — deepening a correlation into a cause.

Minimal config 

source_repos:
  allow:
    - github.com/acme/*              # every repo directly under the org
    - gitlab.com/acme/infra-modules  # or exact host/org/repo

Verify it locally

Fire a test incident whose root cause is a version bump and confirm source_diff was called:

kubectl -n runlore logs deploy/runlore | grep 'tool=source_diff'

Notes

  • Unset (default) ⇒ the tool is not registered. Only patterns you list are reachable — this allowlist is the security boundary, enforced server-side before any network call: the model can only make RunLore clone repos you explicitly listed. Patterns are host/org/repo with per-segment globs.
  • Auth — the forge GitHub App must be granted access to each private source repo. source_diff clones over HTTPS using the forge GitHub App installation token (the same App as forge.github_app, see GitHub), and that token attaches to every clone on the forge’s host. For each private GitHub repo you list, the App must be installed on that repo with contents: read — otherwise the installation token is out of scope and the clone fails (404/repository not found), even though the URL looks right. Verify with gh api /installation/repositories, or grant it in the App’s settings (Repository access → Only select repositories → add the repo). Keep that installation scope as tight as this allowlist.
  • Public GitHub repos need no grant — an installation token can read any public repo regardless of scope.
  • Entries on a non-forge host (e.g. gitlab.com/...) clone anonymously — the GitHub token is never sent off-host. Private non-GitHub hosts are not supported yet.
  • Read-only, no working-tree checkout. Bare mirrors when the mirror cache is enabled (the default — reuses the gitops.mirror directory, under a source/ subdir, so a warm mirror costs nothing after the first clone), or a no-checkout clone per call when the cache is disabled. Either way, nothing is ever written back to the source repo.
  • A wrong repo guess fails at ref resolution (the tag won’t exist), and the error response lists nearby tags so the model can self-correct instead of retrying blind.

Reference

AWS cloud control planeMCP