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 vchelaru/FlatRedBall2 --skill hex-gridgit clone --depth 1 https://github.com/vchelaru/FlatRedBall2Wrote 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/vchelaru/flatredball2/hex-grid)<a href="https://agentmods.dev/skills/vchelaru/flatredball2/hex-grid"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/hex-grid/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/vchelaru/flatredball2/hex-grid"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/hex-grid.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 | $0.00040 | $0.00416 |
| Opus 5.5 | $0.00016 | $0.00166 |
| Sonnet 5.5 | $0.00008 | $0.00083 |
| Haiku 4.5 | $0.00004 | $0.00042 |
Grade A, and why
hex-grid 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 25d 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
Hex Grid
Use HexGrid for layout math and HexShapes for sparse static collision. See the collision-relationships, entities-and-factories, and shapes skills for the surrounding engine patterns.
Map
| File | Purpose |
|---|---|
src/Math/HexCoordinate.cs |
Axial (Q, R) identity, neighbors, and distance |
src/Math/HexGrid.cs |
Immutable pointy/flat layout and world-coordinate conversion |
src/Collision/HexShapes.cs |
Occupied cells, collision, and aggregate debug rendering |
Setup Pattern
var grid = new HexGrid(16f, HexOrientation.PointyTop, Vector2.Zero);
var solids = new HexShapes(grid) { IsVisible = true };
solids.AddHexAtCell(new HexCoordinate(0, 0));
Add(solids);
var actors = new Factory<Player>(this);
actors.Create();
AddCollisionRelationship(actors, solids).MoveFirstOnCollision();
grid.GetCellAt(worldPosition) returns a cell in the mathematical grid; check solids.ContainsCell(cell) separately when occupancy matters.
Landmines
Radiusis center-to-vertex distance, andOriginis the center of cell(0,0). World Y increases upward; negative axial coordinates are valid.HexGridis immutable layout math. RebuildHexShapeswhen radius, orientation, or origin changes.- Add
HexShapesonce as an aggregate renderable; its visibility affects drawing only, and occupied cells remain collidable while hidden. - Collision is discrete. High-speed tunneling and escape from arbitrary embedded positions are not guaranteed; unresolved queries terminate and still report contact.
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.
- 25d ago First seen · 39 lines · 40 tokens per session scan A 91dd8018fae3
hex-grid is a skill published in the GitHub repository vchelaru/FlatRedBall2 (15 stars, last pushed yesterday), licensed MIT. It adds 40 tokens to every session and 416 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-25.
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