ci: cost hygiene (concurrency, filters, retention)

.github/workflows/ci.yml

@@ -5,6 +5,10 @@ on:
     branches: [main]
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 

.github/workflows/coderabbit-fallback-review.yml

@@ -13,7 +13,8 @@ name: CodeRabbit fallback review
 on:
   schedule:
     # Stagger this minute when copying to other repos so they do not fire together.
-    - cron: "59 * * * *"
+    # Was hourly (`59 * * * *`); now once daily on weekdays.
+    - cron: "59 0 * * 1-5"
   issue_comment:
     types: [created]
   pull_request:
@@ -77,7 +78,7 @@ jobs:
           FALLBACK_COMMENT_BODY: ${{ github.event.comment.body }}
           # Pin one PR for issue_comment, workflow_dispatch(pr_number), and
           # pull_request (the triggering PR). Schedule leaves this empty so the
-          # hourly sweep can drain the backlog.
+          # weekday daily sweep can drain the backlog.
           FALLBACK_PR_NUMBER: ${{ inputs.pr_number || github.event.issue.number || github.event.pull_request.number }}
           # pull_request runs are always dry-run so opening this workflow cannot
           # comment on other PRs. schedule and issue_comment may post.

.github/workflows/pr-title.yml

@@ -4,6 +4,10 @@ on:
   pull_request:
     types: [opened, edited, synchronize, reopened]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 # Token needs read access to the PR payload; some orgs tighten defaults.
 permissions:
   contents: read

.github/workflows/release.yml

@@ -47,6 +47,7 @@ jobs:
         with:
           name: binaries-${{ matrix.target }}
           path: ${{ env.ASSET }}
+          retention-days: 7
 
   build-ui-macos:
     name: build menu bar app (${{ matrix.target }})
@@ -239,6 +240,7 @@ jobs:
         with:
           name: ui-${{ matrix.target }}
           path: ui-out/*
+          retention-days: 7
 
   assemble-assets:
     name: assemble release assets
@@ -304,6 +306,7 @@ jobs:
         with:
           name: release-assets-${{ github.ref_name }}
           path: release-assets/*
+          retention-days: 7
 
   formula-smoke-prepublish:
     name: pre-publish formula smoke (${{ matrix.arch }})
@@ -401,6 +404,7 @@ jobs:
         with:
           name: formula-${{ github.ref_name }}
           path: Formula/microbridge.rb
+          retention-days: 7
 
   formula-smoke-public-assets:
     name: public-asset formula smoke (${{ matrix.arch }})