Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add 0xheycat/isometric-game-skills --skill depth-sorting-occlusiongit clone --depth 1 https://github.com/0xheycat/isometric-game-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/0xheycat/isometric-game-skills/depth-sorting-occlusion)<a href="https://agentmods.dev/skills/0xheycat/isometric-game-skills/depth-sorting-occlusion"><img src="https://agentmods.dev/badge/skills/0xheycat/isometric-game-skills/depth-sorting-occlusion/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/0xheycat/isometric-game-skills/depth-sorting-occlusion"><img src="https://agentmods.dev/badge/skills/0xheycat/isometric-game-skills/depth-sorting-occlusion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.00438 |
| Opus 5 | $0.00016 | $0.00219 |
| Sonnet 5 | $0.00006 | $0.00088 |
| Haiku 4.5 | $0.00003 | $0.00044 |
Grade A, and why
depth-sorting-occlusion scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Depth Sorting & Occlusion
Overview
In isometric, draw order IS depth. A character is behind a tree if its anchor tile sorts earlier. This skill gives the correct sort key and handles tall/multi-tile objects that break naive sorting.
When to Use
- Characters render in front of trees/walls they should be behind.
- Tall or multi-tile objects sort incorrectly.
- You added objects and the layering looks wrong.
Process
- Give every drawable a depth key based on its anchor tile: depth = row + col.
- Sort all objects by depth ascending before drawing.
- For ties, break by a secondary key (e.g. y, then creation order).
- For multi-tile objects, sort by the FRONT-most occupied tile.
- For very tall objects, consider splitting into stackable slices.
- Re-sort only when objects move, not every frame if static.
- Test the classic case: walk a character around all four sides of a tree.
objects.sort((a, b) => (a.row + a.col) - (b.row + b.col));
Rationalizations (Stop Lying to Yourself)
| Excuse | Reality |
|---|---|
| "Painter order by y is good enough" | Pure y fails for multi-tile and tall sprites. Use anchor row+col. |
| "I will sort once at load" | Moving objects must re-sort. Sort on movement. |
Red Flags - STOP if you catch yourself:
- Sorting by raw y instead of anchor tile.
- Multi-tile objects using their center instead of front tile.
- Characters clipping through tall buildings.
Verification
You are NOT done until every box is checked:
- Walking around all sides of an object always sorts correctly.
- Multi-tile and tall objects occlude properly.
- Sorting updates when objects move.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 53 lines · 32 tokens per session scan A 360c63351e53
depth-sorting-occlusion is a skill published in the GitHub repository 0xheycat/isometric-game-skills (15 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 438 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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