# Tilemap Review

> Reviews Godot TileMap implementation for known pitfalls. Triggers AFTER implementation, when code involves TileMapLayer, TileSet, TileSetAtlasSource, TileSetScenesCollectionSource, terrain painting, set_cell, erase_cell, get_cell_tile_data, collision polygons on tiles, or NavigationRegion2D with tile-based navigation. Do NOT use this skill for planning or teaching — only for post-implementation review.

- Skill: `valkor-ai/tilemap-review` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add valkor-ai/tilemap-review`
- Raw SKILL.md: https://api.skillmd.com/api/skills/valkor-ai/tilemap-review/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: valkor-ai (https://skillmd.com/u/valkor-ai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/valkor-ai/tilemap-review

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# TileMap Review

Post-implementation reviewer for Godot TileMap code. Checks against known gotchas that LLMs consistently get wrong.

## When to trigger

After TileMap-related code is written or modified. Look for:
- TileMapLayer, TileSet, TileSetAtlasSource, TileSetScenesCollectionSource nodes
- Cell operations (`set_cell`, `erase_cell`, `set_cells_terrain_connect`)
- TileData access (`get_cell_tile_data`)
- Collision/navigation polygon configuration on tiles
- `y_sort_enabled` on TileMapLayer
- NavigationRegion2D with TileMapLayer children

## Review process

1. Read `gotchas.md`
2. Scan the implemented code against each gotcha
3. For each hit:
   - Cite the gotcha ID (e.g. G1)
   - Show the offending code
   - Provide the fix
4. If no hits, report clean
5. Optionally run `checklist.md` static checks for automated verification

When you need specific API details, delegate to the **godot-api** skill.