Document external extension reference

CHANGELOG.md

@@ -25,6 +25,8 @@ release tags and PEP 440 for the Python package.
 - Trusted in-process Runtime Extension API v0.1 with entry-point discovery, manifest and collision
   validation, capability-limited service factories, explicit enablement, lifecycle health, and
   fail-closed Music Studio integration.
+- Independent AgentMesh Extension Starter reference repository proving two-distribution discovery
+  with a deterministic Daily Brief service, API, workspace, health probe, tests, and free CI.
 
 ## 0.1.0-alpha.1 — 2026-07-27
 

README.md

@@ -219,6 +219,9 @@ set it to an empty value to disable every installed extension. Inspect effective
 required Features/Credentials, permissions, workspaces, and health at `GET /api/v1/extensions`.
 Third-party trusted Python packages can publish the `agentmesh.runtime_extensions` entry-point
 group. See the [Runtime Extension Protocol](docs/architecture/modules/runtime-extension-protocol.md).
+The independent
+[AgentMesh Extension Starter](https://github.com/0YHR0/AgentMesh-Extension-Starter) provides a
+tested Daily Brief scenario and a minimal repository template for extension authors.
 
 The same gates expose the built-in **Market Intelligence Studio** in the Admin Console's
 **Company** tab. Previewing it shows all 32 resource mutations, permissions, credentials, and the

README.zh-CN.md

@@ -148,6 +148,8 @@ Music Studio 现在通过受信任的进程内 Runtime Extension API 加载，
 默认配置为 `AGENTMESH_RUNTIME_EXTENSIONS=agentmesh.music-studio`；将其设为空可禁用全部已安装
 扩展。`GET /api/v1/extensions` 可以查看版本、健康状态、所需 Feature/API Key、权限和工作区。
 扩展开发说明见 [Runtime Extension Protocol](docs/architecture/modules/runtime-extension-protocol.md)。
+独立仓库 [AgentMesh Extension Starter](https://github.com/0YHR0/AgentMesh-Extension-Starter)
+提供了已通过 CI 的 Daily Brief 场景，可直接作为第三方扩展项目模板。
 
 Identity/RBAC 在所有内置 Profile 中都保持关闭，必须由部署者显式配置凭据后开启。
 

docs/architecture/modules/runtime-extension-protocol.md

@@ -82,6 +82,15 @@ generic runtime supplies its required services, and its registrar preserves thes
 Its Company Template is also projected into `PackCatalog`, so declarative installation and
 executable runtime discovery come from one scenario definition.
 
+## External repository proof
+
+[AgentMesh Extension Starter](https://github.com/0YHR0/AgentMesh-Extension-Starter) is maintained
+as an independent repository and Python distribution. Its `community.daily-brief` extension
+provides a deterministic service, API, workspace, static assets, and health probe without changing
+AgentMesh source code. Its CI checks out AgentMesh, installs both distributions, runs extension
+tests and lint, and builds the wheel. Installing that wheel makes the existing entry-point registry
+discover both Music Studio and Daily Brief in the same process.
+
 ## Deliberate v0.1 limits
 
 - extensions run in the AgentMesh API process and have the privileges of that process;
@@ -90,5 +99,6 @@ executable runtime discovery come from one scenario definition.
 - signed bundles, registry trust policy, dependency resolution, hot reload, process isolation, and
   remote A2A extensions remain later protocol versions.
 
-The next security step should be a signed installation/preflight model. Process isolation should
-only follow after the in-process contract is proven by a second independently maintained scenario.
+The next security step should be a signed installation/preflight model. Process isolation can now
+follow the independently maintained Daily Brief proof instead of being designed against only a
+built-in scenario.

docs/implementation-status.md

@@ -207,6 +207,17 @@ Runtime Extension API v0.1 on 2026-08-03 additionally:
 - kept installed Python extensions explicitly trusted and deferred signatures, sandboxing, hot
   reload, extension migrations, and remote execution to later protocol revisions.
 
+External Runtime Extension proof on 2026-08-03 additionally:
+
+- published the independent `AgentMesh-Extension-Starter` repository with the
+  `community.daily-brief` scenario;
+- proved wheel metadata discovery through `agentmesh.runtime_extensions` without modifying the
+  AgentMesh source tree;
+- verified Music Studio and Daily Brief can coexist in one registry without route, workspace, or
+  asset collisions;
+- added free GitHub CI covering lint, extension tests, integration against AgentMesh, and wheel
+  construction.
+
 Market Intelligence Studio baseline verification on 2026-07-30 additionally:
 
 - passed 390 non-PostgreSQL tests at 82.71% line coverage (gate: 80%);