chore: migrate from bun to pnpm + vitest + esbuild

- Replace bun:test with vitest across all packages
- Replace bun build with esbuild
- Replace bun:sqlite with better-sqlite3
- Fix OCAS Store API: store.put/get → store.cas.put/get
- Fix vitest vi.mock hoisting (vi.hoisted)
- Add pnpm-workspace.yaml and pnpm-lock.yaml
- Update all package.json test/build scripts

WIP: 8 failures remain in agent-hermes (bun engines check + sqlite migration)

Refs #26

packages/agent-hermes/__tests__/acp-client.test.ts

@@ -1,5 +1,4 @@
-import { afterEach, beforeEach, describe, expect, it } from "bun:test";
-
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
 import { HermesAcpClient } from "../src/acp-client.js";
 
 describe("handleSessionUpdate — text extraction", () => {

packages/agent-hermes/__tests__/hermes-prompt.test.ts

@@ -1,4 +1,4 @@
-import { describe, expect, test } from "bun:test";
+import { describe, expect, test } from 'vitest';
 import type { ThreadId } from "@united-workforce/protocol";
 import type { AgentContext } from "@united-workforce/util-agent";
 import { buildHermesPrompt } from "../src/hermes.js";

packages/agent-hermes/__tests__/integration/acp-client.integration.test.ts

@@ -1,5 +1,4 @@
-import { afterEach, beforeEach, describe, expect, it } from "bun:test";
-
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
 import { HermesAcpClient } from "../../src/acp-client.js";
 
 const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;

packages/agent-hermes/__tests__/integration/resume-e2e.integration.test.ts

@@ -1,5 +1,4 @@
-import { afterEach, describe, expect, it } from "bun:test";
-
+import { afterEach, describe, expect, it } from 'vitest';
 import { HermesAcpClient } from "../../src/acp-client.js";
 
 /**

packages/agent-hermes/__tests__/issue-551.test.ts

@@ -1,8 +1,10 @@
-import { describe, expect, test } from "bun:test";
+import { describe, expect, test } from 'vitest';
+import { dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
 import { readFileSync } from "node:fs";
 import { join } from "node:path";
 
-const PKG_ROOT = join(import.meta.dir, "..");
+const PKG_ROOT = join(dirname(fileURLToPath(import.meta.url)), "..");
 
 describe("Issue #551 — bin entry & engines", () => {
   test("package.json declares bun in engines", () => {

packages/agent-hermes/__tests__/session-detail.test.ts

@@ -1,5 +1,5 @@
-import { Database } from "bun:sqlite";
-import { describe, expect, test } from "bun:test";
+import Database from "better-sqlite3";
+import { describe, expect, test } from 'vitest';
 import { mkdtemp, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
@@ -106,7 +106,7 @@ describe("storeHermesSessionDetail", () => {
 
     expect(output).toBe("done");
 
-    const detailNode = store.get(detailHash);
+    const detailNode = store.cas.get(detailHash);
     expect(detailNode).not.toBeNull();
     if (detailNode === null) {
       return;

packages/agent-hermes/package.json

@@ -12,23 +12,24 @@
   },
   "exports": {
     ".": {
-      "bun": "./src/index.ts",
       "types": "./dist/index.d.ts",
       "import": "./dist/index.js"
     }
   },
   "scripts": {
-    "prepublishOnly": "echo 'Use bun run release from repo root' && exit 1",
-    "test": "bun test __tests__/",
-    "test:ci": "bun test __tests__/"
+    "prepublishOnly": "echo 'Use pnpm run release from repo root' && exit 1",
+    "test": "vitest run __tests__/",
+    "test:ci": "vitest run __tests__/"
   },
   "dependencies": {
-    "@ocas/core": "^0.1.1",
-    "@united-workforce/util-agent": "workspace:^",
+    "@ocas/core": "^0.2.2",
     "@united-workforce/protocol": "workspace:^",
-    "@united-workforce/util": "workspace:^"
+    "@united-workforce/util": "workspace:^",
+    "@united-workforce/util-agent": "workspace:^",
+    "better-sqlite3": "^12.10.0"
   },
   "devDependencies": {
+    "@types/better-sqlite3": "^7.6.13",
     "typescript": "^5.8.3"
   },
   "publishConfig": {
@@ -43,8 +44,5 @@
   "bugs": {
     "url": "https://git.shazhou.work/shazhou/united-workforce/issues"
   },
-  "engines": {
-    "bun": ">= 1.0.0"
-  },
   "license": "MIT"
 }

packages/agent-hermes/src/session-detail.ts

@@ -1,4 +1,4 @@
-import { Database } from "bun:sqlite";
+import Database from "better-sqlite3";
 import { readFile } from "node:fs/promises";
 import { homedir } from "node:os";
 import { join } from "node:path";
@@ -156,13 +156,13 @@ export function loadHermesSessionFromDb(
   try {
     db = new Database(resolvedPath, { readonly: true });
     const session = db
-      .query("SELECT id, model, started_at FROM sessions WHERE id = ?")
+      .prepare("SELECT id, model, started_at FROM sessions WHERE id = ?")
       .get(sessionId) as DbSessionRow | null;
     if (session === null) {
       return null;
     }
     const rows = db
-      .query(
+      .prepare(
         "SELECT role, content, reasoning, tool_calls FROM messages WHERE session_id = ? ORDER BY id",
       )
       .all(sessionId) as DbMessageRow[];
@@ -285,7 +285,7 @@ export async function storeHermesSessionDetail(
     if (turn === null) {
       continue;
     }
-    const hash = await store.put(schemas.turn, turn);
+    const hash = await store.cas.put(schemas.turn, turn);
     turnHashes.push(hash);
     turnIndex += 1;
   }
@@ -297,12 +297,12 @@ export async function storeHermesSessionDetail(
     turnCount: turnHashes.length,
     turns: turnHashes,
   };
-  const detailHash = await store.put(schemas.detail, detail);
+  const detailHash = await store.cas.put(schemas.detail, detail);
   const output = extractLastAssistantContent(session.messages);
   return { detailHash, output };
 }
 
 export async function storeHermesRawOutput(store: Store, rawOutput: string): Promise<string> {
   const schemas = await registerHermesSchemas(store);
-  return store.put(schemas.rawOutput, { text: rawOutput });
+  return store.cas.put(schemas.rawOutput, { text: rawOutput });
 }