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mime-detection-routing

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MIME detection and routing for misrouted files or new formats.

.ai-rulez/skills/mime-detection-routing/SKILL.md

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# MIME Detection & Routing

## Detection Flow

```text
Policy -> content and/or extension evidence -> validate_mime_type -> registry.get(mime) -> extractor
```

## Key Functions

| Function | Location | Behaviour |
| --- | --- | --- |
| `detect_mime_type(path, check_exists: bool)` | `core/mime.rs` | **Path-based only** — never reads bytes. Lowercased extension → `EXT_TO_MIME`, then tree-sitter extension detection (feature `tree-sitter`), then `mime_guess::from_path`. `check_exists` gates a file-existence check, not content inspection. |
| `detect_mime_type_from_bytes(bytes)` | `core/mime.rs` | Magic-number detection via the `infer` crate. The only content-sniffing entry point. |