ci: reduce macOS runner contention

.github/workflows/ci.yml

@@ -311,15 +311,11 @@ jobs:
         run: npm run verify:inspector
 
   apple-artifacts:
-    name: Real Apple artifact CLI/MCP E2E (${{ matrix.group }})
+    name: Real Apple artifact CLI/MCP E2E
     needs: changes
     if: needs.changes.outputs.apple == 'true'
     runs-on: macos-15
     timeout-minutes: 15
-    strategy:
-      fail-fast: false
-      matrix:
-        group: [artifacts, native-regressions]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -328,7 +324,6 @@ jobs:
           cache: npm
       - run: npm ci
       - name: Verify Apple artifact formats and metadata
-        if: matrix.group == 'artifacts'
         run: |
           npm run verify:keyed-archive
           npm run verify:asset-catalog
@@ -337,7 +332,6 @@ jobs:
           npm run verify:apple-dispatch
           npm run verify:interface-builder
       - name: Run native Apple and process boundary regressions
-        if: matrix.group == 'native-regressions'
         run: >-
           npm run test:focused --
           tests/boundary/filesystem/installScript.test.ts

docs/testing.md

@@ -835,11 +835,10 @@ target-free analysis, configuration backups/recovery, Evidence and owned
 lifecycle; Inspector checks execute source-owned loopback targets and special
 filename cases.
 
-The Apple artifact CLI/MCP lane uses two macOS jobs: artifact-format and metadata
-verifiers run together in one group, while the existing focused native and
-process-boundary regressions run in the other. Both groups retain the same
-`macos-15` host and timeout; the process-boundary test group remains ordered
-within its Vitest run.
+The Apple artifact CLI/MCP lane uses one `macos-15` job to avoid adding demand
+for scarce macOS runner capacity. It runs the artifact-format and metadata
+verifiers, followed by one consolidated focused invocation containing all
+existing native and process-boundary regression paths.
 
 The Linux source-test shards download a shared runtime and generated test
 metadata snapshot produced by the build job with `npm run test:prepare`. The