refactor(query): deepen command/dispatch seams and resolve coderabbit findings

* refactor(query): deepen command definition seam and fold fallback mapping cleanup

* refactor(query): add shared dispatch formatting module seam

* fix(query): restore QueryResult type import in dispatch deps

* test/query: align raw-output policy and definition normalization contracts

* refactor(query): deepen diagnosis, invariant report, and error taxonomy seams

* refactor(query): deepen dispatch plan, fallback bridge, policy snapshot, and hints seams

* refactor(query): deepen validation, fallback policy, capability, and result builder seams

* refactor(query): deepen resolution strategy, output classifier, observability, and policy-capability seams

* refactor(query): finalize deep strategy/classifier/observability/capability seams

* test/query: address coderabbit inline and out-of-diff dispatch nits

* fix(query): address remaining coderabbit input-validation and bridge stderr threads

* fix(query): address remaining coderabbit dispatch and strategy/output nits

sdk/src/query/query-fallback-output-classifier.ts

@@ -0,0 +1,31 @@
+import { readFile } from 'node:fs/promises';
+
+export interface FallbackOutputClassification {
+  mode: 'json' | 'text';
+  output: unknown;
+}
+
+async function parseCliQueryJsonOutput(raw: string, projectDir: string): Promise<unknown> {
+  const trimmed = raw.trim();
+  if (trimmed === '') return null;
+  let jsonStr = trimmed;
+  if (jsonStr.startsWith('@file:')) {
+    const rel = jsonStr.slice(6).trim();
+    const { resolvePathUnderProject } = await import('./helpers.js');
+    const filePath = await resolvePathUnderProject(projectDir, rel);
+    jsonStr = await readFile(filePath, 'utf-8');
+  }
+  return JSON.parse(jsonStr);
+}
+
+export async function classifyFallbackOutput(raw: string, projectDir: string): Promise<FallbackOutputClassification> {
+  if (raw.trim() === '') {
+    return { mode: 'text', output: raw };
+  }
+  try {
+    const output = await parseCliQueryJsonOutput(raw, projectDir);
+    return { mode: 'json', output };
+  } catch {
+    return { mode: 'text', output: raw };
+  }
+}