refactor(generation): consume the package everywhere and delete lib/generation (#1090)

Part D of #1057 — the switch. All consumers import @openmaic/generation; lib/generation deleted (net -11,900 lines). PBL wiring preserved (single-call -> classified fallback -> injected loop), streaming outline route deduplicated onto buildOutlinePrompt, serverExternalPackages wired, and the change verified by a real-model four-kind end-to-end run against the production build with a rendered-classroom screenshot check. Closes #1057.

eval/outline-language/runner.ts

@@ -18,9 +18,9 @@
 import { readFileSync } from 'fs';
 import { join, dirname } from 'path';
 import { fileURLToPath } from 'url';
-import { generateSceneOutlinesFromRequirements } from '@/lib/generation/outline-generator';
+import { generateSceneOutlinesFromRequirements } from '@openmaic/generation';
 import { callLLM } from '@/lib/ai/llm';
-import type { AICallFn } from '@/lib/generation/pipeline-types';
+import type { AICallFn } from '@openmaic/generation';
 import { resolveEvalModel } from '../shared/resolve-model';
 import { createRunDir } from '../shared/run-dir';
 import { judgeDirective } from './judge';

eval/pbl-v2-planner/runner.ts

@@ -46,7 +46,7 @@ import { callLLM } from '@/lib/ai/llm';
 import { generatePBLV2Project } from '@/lib/pbl/v2/agents/planner';
 import { generatePBLV2ProjectSingleCall } from '@/lib/pbl/v2/agents/planner-single-call';
 import { PlannerV2Error } from '@/lib/pbl/v2/agents/planner-core';
-import { parseJsonResponse } from '@/lib/generation/json-repair';
+import { parseJsonResponse } from '@openmaic/generation';
 import { buildCompareHtml } from './compare-html';
 import type { PBLPlannerV2Input, PBLProjectV2 } from '@/lib/pbl/v2/types';
 import type { SceneOutline } from '@/lib/types/generation';
@@ -457,7 +457,15 @@ function runVariant(
   thinkingConfig?: ThinkingConfig,
 ): Promise<PBLProjectV2> {
   return variant === 'single-call'
-    ? generatePBLV2ProjectSingleCall(input, model, callLLM, undefined, thinkingConfig)
+    ? generatePBLV2ProjectSingleCall(input, async (system, prompt) => {
+        const result = await callLLM(
+          { model, system, prompt },
+          'pbl-v2-planner-single',
+          undefined,
+          thinkingConfig,
+        );
+        return result.text;
+      })
     : generatePBLV2Project(input, model, callLLM, undefined, thinkingConfig);
 }