fix(ci): isolate config doc baseline heap pressure

src/config/doc-baseline.ts

@@ -497,6 +497,7 @@ async function loadBundledConfigSchemaResponse(): Promise<ConfigSchemaResponse>
   logConfigDocBaselineDebug(`imported ${channelPlugins.length} bundled channel plugins`);
 
   return buildConfigSchema({
+    cache: false,
     plugins: manifestRegistry.plugins
       .filter((plugin) => plugin.origin === "bundled")
       .map((plugin) => ({

src/config/schema.ts

@@ -450,6 +450,7 @@ function buildBaseConfigSchema(): ConfigSchemaResponse {
 export function buildConfigSchema(params?: {
   plugins?: PluginUiMetadata[];
   channels?: ChannelUiMetadata[];
+  cache?: boolean;
 }): ConfigSchemaResponse {
   const base = buildBaseConfigSchema();
   const plugins = params?.plugins ?? [];
@@ -457,10 +458,13 @@ export function buildConfigSchema(params?: {
   if (plugins.length === 0 && channels.length === 0) {
     return base;
   }
-  const cacheKey = buildMergedSchemaCacheKey({ plugins, channels });
-  const cached = mergedSchemaCache.get(cacheKey);
-  if (cached) {
-    return cached;
+  const useCache = params?.cache !== false;
+  const cacheKey = useCache ? buildMergedSchemaCacheKey({ plugins, channels }) : null;
+  if (cacheKey) {
+    const cached = mergedSchemaCache.get(cacheKey);
+    if (cached) {
+      return cached;
+    }
   }
   const mergedWithoutSensitiveHints = applyHeartbeatTargetHints(
     applyChannelHints(applyPluginHints(base.uiHints, plugins), channels),
@@ -480,7 +484,9 @@ export function buildConfigSchema(params?: {
     schema: mergedSchema,
     uiHints: mergedHints,
   };
-  setMergedSchemaCache(cacheKey, merged);
+  if (cacheKey) {
+    setMergedSchemaCache(cacheKey, merged);
+  }
   return merged;
 }
 

test/fixtures/test-parallel.behavior.json

@@ -23,6 +23,10 @@
         "file": "src/cli/command-secret-gateway.test.ts",
         "reason": "Clean in isolation, but can hang after sharing the broad lane."
       },
+      {
+        "file": "src/config/doc-baseline.test.ts",
+        "reason": "Builds the full bundled config schema graph and is safer outside the shared unit-fast heap."
+      },
       {
         "file": "src/memory/manager.get-concurrency.test.ts",
         "reason": "Memory manager cache concurrency coverage can spike shared unit-fast heap on Linux Node 24."