[aw] Agentic State Machine — Diagram Generator failed

### Workflow Failure

**Workflow:** [Agentic State Machine — Diagram Generator](https://github.com/dotnet/fsharp/blob/main/.github/workflows/agentic-state-machine.md)
**Branch:** main
**Run:** https://github.com/dotnet/fsharp/actions/runs/34913733932
**Pull Request:** [#15107](https://github.com/dotnet/fsharp/pull/15107)

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

**Last agent output:**
```
└ 50 lines found
● Read state-machine.md
│ .github/docs/state-machine.md
└ L12:29 (18 lines read)
● Edit
└ Edit .github/docs/state-machine.md
The structural draft is within budget. I’m rerunning the required independent adversarial review against the sources before parsing and committing.
● General-purpose Verify workflow documentation
└ Agent started in background with agent_id: state-machine-reverify. You'l...
Verification is running; awaiting the independent review.
```

### 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/34913733932
````

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 agentic-state-machine failure in https://github.com/dotnet/fsharp/actions/runs/34913733932`

> [!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 [Agentic State Machine — Diagram Generator](https://github.com/dotnet/fsharp/actions/runs/34913733932) · gpt56 4.7M · [◷](https://github.com/search?q=repo%3Adotnet%2Ffsharp+is%3Aissue+%22gh-aw-workflow-id%3A+agentic-state-machine%22&type=issues)
> - [x] expires on Sep 22, 2026, 12:51 AM UTC

Start with the failed run and .github/workflows/agentic-state-machine.md, then read .github/docs/state-machine.md and the referenced debug.md guidance. Review .github/agents/agentic-workflows.agent.md before invoking the agentic workflow again. Done means the workflow completes without the reported copilot engine failure.

Written by the indexing model from the issue text.