[aw] Repo Assist failed

### Workflow Failure

**Workflow:** [Repo Assist](https://github.com/githubnext/agentics/blob/7c7feb61a52b662eb2089aa2945588b7a200d404/workflows/repo-assist.md)
**Branch:** main
**Run:** https://github.com/dotnet/fsharp/actions/runs/29546326508
**Pull Request:** [#15107](https://github.com/dotnet/fsharp/pull/15107)

**⚠️ Engine Failure**: The `copilot` engine terminated unexpectedly.

**Last agent output:**
```
Authentication failed with provider at http://172.30.0.30:10002 (HTTP 401).
Check your COPILOT_PROVIDER_API_KEY or COPILOT_PROVIDER_BEARER_TOKEN.
Changes +0 -0
Duration 0s
```

### Action Required

**Assign this issue to an agent** to debug and fix the issue.

Debug with any coding agent

Use this prompt with any coding agent (GitHub Copilot, Claude, Gemini, etc.):

````
Debug the agentic workflow failure using https://raw.githubusercontent.com/github/gh-aw/main/debug.md

The failed workflow run is at https://github.com/dotnet/fsharp/actions/runs/29546326508
````

Manually invoke the agent

Debug this workflow failure using your favorite Agent CLI and the `agentic-workflows` prompt.

- Start your agent
- Load the `agentic-workflows` prompt from `.github/agents/agentic-workflows.agent.md` or
- Type `debug the agentic workflow repo-assist failure in https://github.com/dotnet/fsharp/actions/runs/29546326508`

> [!TIP]
>
> Stop reporting this workflow as a failure
>
> To stop a workflow from creating failure issues, set `report-failure-as-issue: false` in its frontmatter:
> ```yaml
> safe-outputs:
> report-failure-as-issue: false
> ```
>
>

> Generated from [Repo Assist](https://github.com/dotnet/fsharp/actions/runs/29546326508) · [◷](https://github.com/search?q=repo%3Adotnet%2Ffsharp+is%3Aissue+%22gh-aw-workflow-id%3A+repo-assist%22&type=issues)
> - [x] expires on Jul 24, 2026, 1:04 AM UTC

Start by reading workflows/repo-assist.md and .github/agents/agentic-workflows.agent.md, then inspect run 29546326508 and the linked pull request #15107. The reported failure is a 401 from the Copilot provider; done means the Repo Assist workflow can authenticate and complete without this engine failure.

Written by the indexing model from the issue text.