feat(tegg): [1/3] add agent-runtime package with OSS-backed store (#5823)

sync from: #5818

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **New Features**
* Introduced a new agent runtime module for managing agent threads and
runs with persistent storage capabilities.
* Added thread creation and run lifecycle operations with metadata and
conversation history management.
* Implemented error handling for missing resources and conflicting
operations.

* **Tests**
* Added comprehensive test suites for agent runtime components and
storage functionality.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: jerryliang64

ecosystem-ci/repo.json

@@ -2,7 +2,7 @@
   "cnpmcore": {
     "repository": "https://github.com/cnpm/cnpmcore.git",
     "branch": "master",
-    "hash": "2f5942f3a0d421f0faa50ea8a7eec68c2dd9b4d2"
+    "hash": "6d6db575c476aa9deaf078117f9b121e1bd7ebdf"
   },
   "examples": {
     "repository": "https://github.com/eggjs/examples.git",

pnpm-lock.yaml

@@ -174,6 +174,7 @@ catalog:
   nunjucks-markdown: ^2.0.1
   on-finished: ^2.4.1
   onelogger: ^1.0.1
+  oss-client: ^2.5.1
   oxc-minify: ^0.105.0
   oxfmt: ^0.20.0
   oxlint: ^1.32.0

pnpm-workspace.yaml

@@ -0,0 +1,55 @@
+{
+  "name": "@eggjs/agent-runtime",
+  "version": "4.0.2-beta.1",
+  "description": "Agent runtime with store abstraction for Egg.js tegg",
+  "keywords": [
+    "agent",
+    "egg",
+    "runtime",
+    "store",
+    "tegg"
+  ],
+  "homepage": "https://github.com/eggjs/egg/tree/next/tegg/core/agent-runtime",
+  "bugs": {
+    "url": "https://github.com/eggjs/egg/issues"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/eggjs/egg.git",
+    "directory": "tegg/core/agent-runtime"
+  },
+  "files": [
+    "dist"
+  ],
+  "type": "module",
+  "main": "./dist/index.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": "./src/index.ts",
+    "./package.json": "./package.json"
+  },
+  "publishConfig": {
+    "access": "public",
+    "exports": {
+      ".": "./dist/index.js",
+      "./package.json": "./package.json"
+    }
+  },
+  "scripts": {
+    "typecheck": "tsgo --noEmit",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@eggjs/tegg-types": "workspace:*",
+    "oss-client": "catalog:"
+  },
+  "devDependencies": {
+    "@types/node": "catalog:",
+    "typescript": "catalog:"
+  },
+  "engines": {
+    "node": ">=22.18.0"
+  }
+}

tegg/core/agent-runtime/package.json

@@ -0,0 +1,10 @@
+import crypto from 'node:crypto';
+
+export function nowUnix(): number {
+  return Math.floor(Date.now() / 1000);
+}
+
+// TODO(PR2): used by AgentRuntime and MessageConverter — remove this comment after PR2 lands
+export function newMsgId(): string {
+  return `msg_${crypto.randomUUID()}`;
+}