[aw] Evergreen — PR Health Keeper failed

### Workflow Failure

**Workflow:** [Evergreen — PR Health Keeper](#)
**Branch:** main
**Run:** https://github.com/githubnext/tsikit-learn/actions/runs/34982355519

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

**Last agent output:**
```
● Request failed (transient_bad_request). Retrying...
● Request failed (transient_bad_request). Retrying...
400 The requested model is not available for integrator "copilot-developer-cli". Available models: [gpt-4.1 claude-fable-5.1 claude-fable-5 claude-opus-4.7 claude-opus-4.8-fast claude-opus-4.8 claude-opus-5 claude-sonnet-5 copilot-search-a copilot-search-b copilot-search-c exec-agent-a exec-agent-b exec-agent-c gemini-3.5-flash gemini-3.6-flash gemini-3.7-flash gemini-3.8-flash gpt-5.3-codex gpt-5.4-mini gpt-5.4-nano gpt-5.4 gpt-5.5 gpt-5.6-luna gpt-5.6-sol gpt-5.6-terra gpt-5.6-luna-utility gpt-6-astra grok-4.5 grok-4.6 kimi-k2.7-code kimi-k3 mai-code-1.1-flash trajectory-compaction gpt-5-mini gpt-3.5-turbo gpt-3.5-turbo-0613 gpt-4o-mini gpt-4o-mini-2024-07-18 copilot-preview-4o-mini-a1cfd608 gpt-4 gpt-4-0613 copilot-preview-gpt4-centralus gpt-4o gpt-4o-2024-11-20 gpt-4o-2024-05-13 gpt-4-o-preview gpt-4o-japanwest copilot-preview-gpt4o-centralus gpt-4o-2024-08-06 claude-haiku-4.5 gpt-4.1-2025-04-14 goldeneye-secondary gpt-5.2]. Verify the correct Copilot-Integration-Id header is being sent.
Changes +0 -0
Duration 27s
● Request failed (transient_bad_request). Retrying...
● Request failed (transient_bad_request). Retrying...
400 The requested model is not available for integrator "copilot-developer-cli". Available models: [gpt-4.1 claude-fable-5.1 claude-fable-5 claude-opus-4.7 claude-opus-4.8-fast claude-opus-4.8 claude-opus-5 claude-sonnet-5 copilot-search-a copilot-search-b copilot-search-c exec-agent-a exec-agent-b exec-agent-c gemini-3.5-flash gemini-3.6-flash gemini-3.7-flash gemini-3.8-flash gpt-5.3-codex gpt-5.4-mini gpt-5.4-nano gpt-5.4 gpt-5.5 gpt-5.6-luna gpt-5.6-sol gpt-5.6-terra gpt-5.6-luna-utility gpt-6-astra grok-4.5 grok-4.6 kimi-k2.7-code kimi-k3 mai-code-1.1-flash trajectory-compaction gpt-5-mini gpt-3.5-turbo gpt-3.5-turbo-0613 gpt-4o-mini gpt-4o-mini-2024-07-18 copilot-preview-4o-mini-a1cfd608 gpt-4 gpt-4-0613 copilot-preview-gpt4-centralus gpt-4o gpt-4o-2024-11-20 gpt-4o-2024-05-13 gpt-4-o-preview gpt-4o-japanwest copilot-preview-gpt4o-centralus gpt-4o-2024-08-06 claude-haiku-4.5 gpt-4.1-2025-04-14 goldeneye-secondary gpt-5.2]. Verify the correct Copilot-Integration-Id header is being sent.
Changes +0 -0
Duration 51s
```

### 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/githubnext/tsikit-learn/actions/runs/34982355519
````

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 evergreen failure in https://github.com/githubnext/tsikit-learn/actions/runs/34982355519`

> [!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 [Evergreen — PR Health Keeper](https://github.com/githubnext/tsikit-learn/actions/runs/34982355519) · [◷](https://github.com/search?q=repo%3Agithubnext%2Ftsikit-learn+is%3Aissue+%22gh-aw-workflow-id%3A+evergreen%22&type=issues)
> - [x] expires on Sep 22, 2026, 2:36 PM UTC

Start with the failed Evergreen — PR Health Keeper run, then read debug.md and .github/agents/agentic-workflows.agent.md. Identify the configuration causing the unavailable-model error and confirm the workflow succeeds on a rerun.

Written by the indexing model from the issue text.