ci: keep lint lane serial

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
             coverage_max_workers: ''
           - lane: lint
             command: pnpm run check:ci:lint
-            gate_concurrency: '2'
+            gate_concurrency: '1'
             publint_concurrency: '8'
             coverage_max_workers: ''
           - lane: coverage

docs/rfc/implemented/process/2026-07-06-parallel-github-ci-gates.md

@@ -12,7 +12,7 @@ The hard part is the artifact boundary. `publint`, `verify-node-next-types`, and
 
 [CI](../../../../.github/workflows/ci.yml) keeps the keyless workflow to a few broad jobs instead of one job per gate. The Node 24 matrix has five lanes: static gates (`pnpm run check:ci:static`), lint (`pnpm run check:ci:lint`), coverage (`pnpm run check:ci:coverage`), snapshot replay (`pnpm run check:ci:snapshot`), and artifact gates (`pnpm run check:ci:artifacts`). The Node 26 compatibility job installs once and runs `pnpm run check:node-compat`.
 
-Each lane delegates to [scripts/run-gates.ts](../../../../scripts/run-gates.ts), an in-process scheduler with bounded concurrency (`DSH_GATE_CONCURRENCY`). The static lane fans out constraints, the echo-agent demo smoke, `doc-sync` leaf gates, module-graph freshness, and `knip`; the lint lane runs source/script/demo files and tests as separate ESLint leaves with their own Node heap cap; the coverage lane runs Vitest coverage with bounded file workers (`DSH_COVERAGE_MAX_WORKERS`); the snapshot lane isolates replay; the artifact lane builds once and then fans out the artifact consumers; the Node 26 compatibility job owns the TypeScript typecheck. The scheduler buffers each gate's output and prints a named result block with duration, so independent failures stay attributable inside each broad job log.
+Each lane delegates to [scripts/run-gates.ts](../../../../scripts/run-gates.ts), an in-process scheduler with bounded concurrency (`DSH_GATE_CONCURRENCY`). The static lane fans out constraints, the echo-agent demo smoke, `doc-sync` leaf gates, module-graph freshness, and `knip`; the lint lane runs ESLint with its own Node heap cap; the coverage lane runs Vitest coverage with bounded file workers (`DSH_COVERAGE_MAX_WORKERS`); the snapshot lane isolates replay; the artifact lane builds once and then fans out the artifact consumers; the Node 26 compatibility job owns the TypeScript typecheck. The scheduler buffers each gate's output and prints a named result block with duration, so independent failures stay attributable inside each broad job log.
 
 Generated `.sessions/` logs and `.doc-typecheck-*` temp directories are ignored by lint. The aggregate local CI mode still runs demo smoke after lint, while the split GitHub static lane can run demo smoke directly because lint is isolated in its own lane.
 

scripts/run-gates.ts

@@ -127,7 +127,9 @@ function gatesForMode(selected: Mode): Gate[] {
     case 'ci-static':
       return ciStaticGates()
     case 'ci-lint':
-      return lintGates()
+      return [
+        lintGate(),
+      ]
     case 'ci-coverage':
       return [
         coverageGate(),
@@ -158,10 +160,10 @@ function ciPrimaryGates(): Gate[] {
   return [
     pnpmScript('constraints', 'constraints'),
     pnpmScript('typecheck', 'typecheck'),
-    ...lintGates(),
+    lintGate(),
     coverageGate(),
     pnpmScript('snapshot', 'test:snapshot'),
-    demoSmokeGate({ needs: ['lint-source', 'lint-tests'] }),
+    demoSmokeGate({ needs: ['lint'] }),
     ...docSyncLeafGates(),
     pnpmScript('module-graph', 'verify-module-graph', { label: 'module graph' }),
     pnpmScript('knip', 'knip'),
@@ -197,29 +199,10 @@ function ciArtifactGates(): Gate[] {
   ]
 }
 
-function lintGates(): Gate[] {
-  const env = { NODE_OPTIONS: nodeOptions('--max-old-space-size=8192') }
-  return [
-    pnpmExec('lint-source', [
-      'eslint',
-      'packages/*/*/src/**/*.ts',
-      'examples/**/*.ts',
-      'scripts/**/*.ts',
-      '--ignore-pattern',
-      'examples/*/tests/**/*.ts',
-    ], {
-      label: 'lint source',
-      env,
-    }),
-    pnpmExec('lint-tests', [
-      'eslint',
-      'packages/*/*/tests/**/*.ts',
-      'examples/*/tests/**/*.ts',
-    ], {
-      label: 'lint tests',
-      env,
-    }),
-  ]
+function lintGate(): Gate {
+  return pnpmScript('lint', 'lint', {
+    env: { NODE_OPTIONS: nodeOptions('--max-old-space-size=8192') },
+  })
 }
 
 function coverageGate(): Gate {