The LLM (Qwen3.5 via OpenRouter) returns JSON wrapped in markdown code blocks:
```json
["project manager", "limits", ...]
```
But the code was trying to parse this directly with json.loads(), causing:
- QueryDecomposer to return empty keywords
- RelevanceFilter to fail with "Expecting value: line 1 column 1"
Changes:
- Added _extract_json_from_markdown() helper function to both modules
- Strips markdown code block markers (```json and ```) before JSON parsing
- Added unit tests for markdown code block handling
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus \u003cclio-agent@sisyphuslabs.ai\u003e
33b960f786