feat(coding): add PI-105 product file host API

electron/coding-runtime/pi/product-tools.ts

@@ -8,6 +8,11 @@ import {
   buildProductCodingCommandCatalog,
   listProductCodingSkills,
 } from '../../coding-projects/skill-registry';
+import type {
+  ProductCodingCommand,
+  ProductCodingSkill,
+  ProductPiCommandInput,
+} from '../../../shared/coding-product-tools';
 import type { KnownToolDetails, RuntimeContextDetailsV1 } from '../contracts';
 import { PiAgentBrowserTool } from './extensions/agent-browser';
 import { reportChangedFiles } from './extensions/changed-file';
@@ -65,6 +70,17 @@ export class PiProductTools {
     return this.changeTracker.getSnapshot(conversationId);
   }
 
+  listSkills(skillIds: readonly string[]): Promise<ProductCodingSkill[]> {
+    return listProductCodingSkills(this.options.bundledSkillsDir, skillIds);
+  }
+
+  async listCommands(
+    skillIds: readonly string[],
+    piCommands: readonly ProductPiCommandInput[] = [],
+  ): Promise<ProductCodingCommand[]> {
+    return buildProductCodingCommandCatalog(await this.listSkills(skillIds), piCommands);
+  }
+
   async markBash(conversationId: string, runId: string): Promise<void> {
     await this.changeTracker.markProjectRefresh(conversationId, runId);
   }
@@ -92,7 +108,7 @@ export class PiProductTools {
       return await reportChangedFiles(this.changeTracker, context, input);
     }
     if (toolName !== 'runtime_context') throw new Error('Product tool is unavailable');
-    const skills = await listProductCodingSkills(this.options.bundledSkillsDir, context.skillIds);
+    const skills = await this.listSkills(context.skillIds);
     const details: RuntimeContextDetailsV1 = {
       schema: 'runtime-context.v1',
       skills,