Add detailed file index and enhance skill documentation for autopilot, decompose, deploy, plan, and research skills. Introduce tests-only mode in decompose skill, clarify required files for deploy and plan skills, and improve prerequisite checks across skills for better user guidance and workflow efficiency.

_docs/02_document/modules/ai_config.md

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+# Module: ai_config
+
+## Purpose
+
+Data class holding all AI recognition configuration parameters, with factory methods for deserialization from msgpack and dict formats.
+
+## Public Interface
+
+### Class: AIRecognitionConfig
+
+#### Fields
+
+| Field | Type | Default | Description |
+|-------|------|---------|-------------|
+| `frame_period_recognition` | int | 4 | Process every Nth frame in video |
+| `frame_recognition_seconds` | double | 2.0 | Minimum seconds between valid video annotations |
+| `probability_threshold` | double | 0.25 | Minimum detection confidence |
+| `tracking_distance_confidence` | double | 0.0 | Distance threshold for tracking (model-width units) |
+| `tracking_probability_increase` | double | 0.0 | Required confidence increase for tracking update |
+| `tracking_intersection_threshold` | double | 0.6 | IoU threshold for overlapping detection removal |
+| `file_data` | bytes | `b''` | Raw file data (msgpack use) |
+| `paths` | list[str] | `[]` | Media file paths to process |
+| `model_batch_size` | int | 1 | Batch size for inference |
+| `big_image_tile_overlap_percent` | int | 20 | Tile overlap percentage for large image splitting |
+| `altitude` | double | 400 | Camera altitude in meters |
+| `focal_length` | double | 24 | Camera focal length in mm |
+| `sensor_width` | double | 23.5 | Camera sensor width in mm |
+
+#### Methods
+
+| Method | Signature | Description |
+|--------|-----------|-------------|
+| `from_msgpack` | `(bytes data) -> AIRecognitionConfig` | Static cdef; deserializes from msgpack binary |
+| `from_dict` | `(dict data) -> AIRecognitionConfig` | Static def; deserializes from Python dict |
+
+## Internal Logic
+
+Both factory methods apply defaults for missing keys. `from_msgpack` uses compact single-character keys (`f_pr`, `pt`, `t_dc`, etc.) while `from_dict` uses full descriptive keys.
+
+**Legacy/unused**: `from_msgpack()` is defined but never called in the current codebase — it is a remnant of a previous queue-based architecture. Only `from_dict()` is actively used. The `file_data` field is stored but never read anywhere.
+
+## Dependencies
+
+- **External**: `msgpack`
+- **Internal**: none (leaf module)
+
+## Consumers
+
+- `inference` — creates config from dict, uses all fields for frame selection, detection filtering, image tiling, and tracking
+
+## Data Models
+
+- `AIRecognitionConfig` — the sole data class
+
+## Configuration
+
+Camera/altitude parameters (`altitude`, `focal_length`, `sensor_width`) are used for ground sampling distance calculation in aerial image processing.
+
+## External Integrations
+
+None.
+
+## Security
+
+None.
+
+## Tests
+
+None found.