feat(mcpedia): Phase 2 — semantic + hybrid search, tRPC/Hono API

- @mcpedia/embeddings: OpenRouter provider (9router /v1, encoding_format float),
  chunkText + embedChunks; EMBED_DIM=2048
- document_chunks table (real[] embedding) — pgvector NOT available on shared
  imrnes Postgres, so cosine is computed in-app (KB-scale fine); pgvector deferred
- indexer: chunk + embed + upsert per document
- @mcpedia/search: semanticSearch (cosine) + hybridSearch (FTS+cosine RRF)
- apps/api: Hono + tRPC v11 (6 procedures), serve on :4020
- MCP: semantic_search + hybrid_search tools (6 total)
- web: keyword/hybrid toggle; .env.example + README + PHASES updated

scripts/indexer.ts

@@ -2,12 +2,13 @@ import { db } from "@mcpedia/db";
 import { documents } from "@mcpedia/db/schema";
 import { parseFile } from "@mcpedia/parser";
 import { CONTENT_ROOT } from "@mcpedia/config";
-import { listContentFiles } from "@mcpedia/core";
+import { listContentFiles, indexChunks } from "@mcpedia/core";
 import { join } from "node:path";
 
 async function main() {
   const files = listContentFiles();
   let indexed = 0;
+  let chunked = 0;
   for (const rel of files) {
     const abs = join(CONTENT_ROOT, rel);
     const { meta, body } = parseFile(abs, rel);
@@ -47,8 +48,20 @@ async function main() {
       });
     indexed++;
     console.log(`  indexed ${rel}`);
+
+    // Phase 2: chunk + embed for semantic search.
+    try {
+      const n = await indexChunks(meta.slug, body);
+      chunked += n;
+      console.log(`    embedded ${n} chunks`);
+    } catch (err) {
+      console.error(
+        `    embed FAILED for ${meta.slug}: ${err instanceof Error ? err.message : err}`,
+      );
+      // Don't abort the whole index over one doc's embedding failure.
+    }
   }
-  console.log(`indexed ${indexed} documents`);
+  console.log(`indexed ${indexed} documents, ${chunked} chunks embedded`);
 }
 
 main()

scripts/package.json

@@ -7,6 +7,7 @@
     "@mcpedia/config": "workspace:*",
     "@mcpedia/core": "workspace:*",
     "@mcpedia/db": "workspace:*",
+    "@mcpedia/embeddings": "workspace:*",
     "@mcpedia/parser": "workspace:*",
     "@mcpedia/search": "workspace:*",
     "drizzle-orm": "^0.38.0",