[naji247]

Summary

.github/workflows/mcp-compat.yml:

 on:
-  pull_request:
+  pull_request:
+    paths:
+      - "lib/**"
+      - "agentcat.gemspec"
+      - "Gemfile"
+      - "Gemfile.lock"
+      - "Rakefile"
+      - "test/**"
+      - "!test/e2e/**"
+      - "scripts/mcp_versions.rb"
+      - "scripts/release.rb"
+      - ".github/workflows/mcp-compat.yml"
   push:
     branches: [main]
   schedule:
-    - cron: "23 4 * * *" # nightly
+    - cron: "0 2 * * *" # nightly, 02:00 UTC
   workflow_dispatch:

No job gating: the workflow holds only compat jobs (discover, compat, report). The header comment now names the 02:00 UTC time and the PR filter.

SDK-code paths: lib/**, agentcat.gemspec, Gemfile, Gemfile.lock, Rakefile, test/** except test/e2e/** (the compat job runs bundle exec rake, which excludes e2e), scripts/mcp_versions.rb (called by discover, tested by the suite), scripts/release.rb (loaded by test/test_release.rb), .github/workflows/mcp-compat.yml.

Evidence

• Before: pull_request (all PRs), push to main, schedule 23 4 * * *, workflow_dispatch.
  After: pull_request with the paths above, push to main, schedule 0 2 * * *, workflow_dispatch. yaml.safe_load passes. actionlint is not installed here and was not run.

Merge Danger

Door: two-way

Blast Radius: CI

main has no branch protection and no rulesets ([] and 404), so no check is required and a path filter cannot block a merge. A PR that changes only README, docs, CHANGELOG, examples, sorbet config, or other workflows now skips the compat matrix; ci.yml still runs the unit suite on every PR.