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docs(skill): document context_length auto-detection resolution chain #49483

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docs(skill): document context_length auto-detection resolution chain #49483

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18 changes: 17 additions & 1 deletion ...-guide/skills/bundled/autonomous-ai-agents/autonomous-ai-agents-hermes-agent.md
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Expand Up @@ -377,7 +377,7 @@ Edit with `hermes config edit` or `hermes config set section.key value`.

| Section | Key options |
|---------|-------------|
| `model` | `default`, `provider`, `base_url`, `api_key`, `context_length` |
| `model` | `default`, `provider`, `base_url`, `api_key`, `context_length` (explicit override; clear to `""` for auto-detect from server `/v1/models`) |
| `agent` | `max_turns` (90), `tool_use_enforcement` |
| `terminal` | `backend` (local/docker/ssh/modal), `cwd`, `timeout` (180) |
| `compression` | `enabled`, `threshold` (0.50), `target_ratio` (0.20) |
Expand Down Expand Up @@ -875,6 +875,22 @@ hermes config set auxiliary.vision.model <model_name>
```

---
### Context window shows wrong size

If Hermes reports a smaller context window than your local model supports
(e.g., 128k when llama-server has `-c 262144`):

**Check if `model.context_length` is explicitly set.** Hermes uses a
multi-source resolution chain (highest priority first):

1. `model.context_length` in config.yaml — **blocks auto-detection if set**
2. Custom provider per-model setting
3. Persistent cache (survives restarts)
4. `/v1/models` endpoint from your server — auto-detected when nothing
above overrides it

**Fix:** Clear the override so auto-detection falls through:


## Where to Find Things

Expand Down