ci: restore hosted lane headroom

scripts/run-gates.ts

@@ -244,7 +244,12 @@ function ciStaticGates(): Gate[] {
     pnpmScript('constraints', 'constraints'),
     pnpmScript('package-invariants', 'verify-package-invariants', { label: 'package invariants' }),
     pnpmScript('cordis-config', 'verify-cordis-config', { label: 'Cordis config' }),
-    ...docSyncLeafGates(),
+    pnpmScript('build', 'build'),
+    ...docSyncLeafGates({
+      docTypecheckNeeds: ['build'],
+      docTypecheckEnv: { DSH_DOC_TYPECHECK_USE_BUILD_OUTPUT: '1' },
+      docsBuildScript: 'docs:build:mpa',
+    }),
     pnpmScript('module-graph', 'verify-module-graph', { label: 'module graph' }),
     pnpmScript('knip', 'knip'),
   ]
@@ -366,6 +371,7 @@ function hygieneLeafGates(options: { artifactNeeds?: string[] } = {}): Gate[] {
 function docSyncLeafGates(options: {
   docTypecheckNeeds?: string[]
   docTypecheckEnv?: Record<string, string | undefined>
+  docsBuildScript?: 'docs:build' | 'docs:build:mpa'
 } = {}): Gate[] {
   const docTypecheckOptions: Partial<Gate> = {}
   if (options.docTypecheckNeeds !== undefined) docTypecheckOptions.needs = options.docTypecheckNeeds
@@ -396,7 +402,7 @@ function docSyncLeafGates(options: {
       label: 'documentation projection',
     }),
     // Keep the VitePress build itself in one gate because projection rewrites website/.generated.
-    pnpmScript('docs-site-build', 'docs:build', { label: 'documentation build' }),
+    pnpmScript('docs-site-build', options.docsBuildScript ?? 'docs:build', { label: 'documentation build' }),
     pnpmScript('package-readme-limitations', 'verify-package-readme-limitations', { label: 'package README limitations' }),
   ]
 }

scripts/snapshot-shards.spec.ts

@@ -26,10 +26,10 @@ describe('snapshot lanes', () => {
 
     expect(new Set(ordinary).size).toBe(ordinary.length)
     expect(acp.map(lane => lane.files)).toEqual(Array.from(
-      { length: 2 },
+      { length: 4 },
       () => ['examples/acp-agent/tests/acp.snapshot.ts'],
     ))
-    expect(acp.map(lane => lane.scenarioShard)).toEqual(['1/2', '2/2'])
+    expect(acp.map(lane => lane.scenarioShard)).toEqual(['1/4', '2/4', '3/4', '4/4'])
     expect([...ordinary, 'examples/acp-agent/tests/acp.snapshot.ts'].sort()).toEqual(discovered)
   })
 

scripts/snapshot-shards.ts

@@ -13,25 +13,20 @@ export interface SnapshotLane {
 /** Exhaustive file ownership plus scenario partitions for the large ACP suite. */
 export const snapshotLanes: readonly SnapshotLane[] = [
   {
-    name: 'support',
+    name: 'ordinary',
     files: [
       'packages/sdk/scripts/tests/config.snapshot.ts',
       'packages/sdk/create-sdk/tests/create.snapshot.ts',
       'packages/ui/tui/tests/tui.snapshot.ts',
-    ],
-  },
-  {
-    name: 'agents',
-    files: [
       'examples/tui-agent/tests/tui.snapshot.ts',
       'examples/acp-agent/tests/goal.snapshot.ts',
       'examples/headless-agent/tests/headless.snapshot.ts',
     ],
   },
-  ...Array.from({ length: 2 }, (_, offset) => ({
+  ...Array.from({ length: 4 }, (_, offset) => ({
     name: `acp-${offset + 1}`,
     files: ['examples/acp-agent/tests/acp.snapshot.ts'],
-    scenarioShard: `${offset + 1}/2`,
+    scenarioShard: `${offset + 1}/4`,
   })),
 ]
 

scripts/static-shards.ts

@@ -23,7 +23,7 @@ export const staticShards = [
   },
   {
     name: 'api-contracts',
-    gateIds: ['doc-typecheck', 'cordis-api', 'export-jsdoc', 'scoped-events', 'type-equivalence'],
+    gateIds: ['build', 'doc-typecheck', 'cordis-api', 'export-jsdoc', 'scoped-events', 'type-equivalence'],
   },
   {
     name: 'catalogs',