[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/30412770918
**Pull Request:** [#15107](https://github.com/dotnet/fsharp/pull/15107)

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

**Last agent output:**
```
Changes +0 -0
Duration 6m 38s
● Request failed due to a transient API error. Retrying...
● Request failed due to a transient API error. Retrying...
● Request failed due to a transient API error. Retrying...
● Request failed due to a transient API error. Retrying...
● Request failed due to a transient API error. Retrying...
Failed to get response from the AI model; retried 5 times (total retry wait time: 32.09 seconds) (Request-ID 8769b7d8-4b2e-41dd-b274-cf306f05c71f) Last error: CAPIError: 502 "Proxy error"
Changes +0 -0
Duration 8m 9s
```

### 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/30412770918
````

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/30412770918`

> [!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/30412770918) · opus46 1.7M · [◷](https://github.com/search?q=repo%3Adotnet%2Ffsharp+is%3Aissue+%22gh-aw-workflow-id%3A+repo-assist%22&type=issues)
> - [x] expires on Aug 5, 2026, 1:12 AM UTC

Start with the failed run for Repo Assist and read workflows/repo-assist.md, then follow the debugging guidance in https://raw.githubusercontent.com/github/gh-aw/main/debug.md. Compare the failure details with the agentic-workflows prompt in .github/agents/agentic-workflows.agent.md. Done means the cause of the transient engine failure is identified and the workflow can complete successfully.

Written by the indexing model from the issue text.