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 OKHP3/skillz --skill okhp3-replit-canvas-boardgit clone --depth 1 https://github.com/OKHP3/skillzWrote 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/okhp3/skillz/okhp3-replit-canvas-board)<a href="https://agentmods.dev/skills/okhp3/skillz/okhp3-replit-canvas-board"><img src="https://agentmods.dev/badge/skills/okhp3/skillz/okhp3-replit-canvas-board/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/okhp3/skillz/okhp3-replit-canvas-board"><img src="https://agentmods.dev/badge/skills/okhp3/skillz/okhp3-replit-canvas-board.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 | $0.00105 | $0.02733 |
| Opus 5 | $0.00053 | $0.01367 |
| Sonnet 5 | $0.00021 | $0.00547 |
| Haiku 4.5 | $0.00011 | $0.00273 |
Grade A, and why
okhp3-replit-canvas-board 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 269 lines — stays where its author put it; the contents beside it link to each section on GitHub.
okhp3-replit-canvas-board
OverKill Hill P³ · overkillhill.com · github.com/OKHP3
A portable Replit Agent Skill for planning and organising the workspace canvas as a structured presentation board — not just placing shapes, but producing a layout that a judge, reviewer, or collaborator can scan in under 30 seconds.
This skill sits above the raw canvas skill API. It teaches layout strategy; the canvas skill (read .local/skills/canvas/SKILL.md) teaches the callbacks.
Scope
| In scope | Out of scope |
|---|---|
| Zone planning, hero rows, gutter math | Canvas callback schemas — read the canvas skill |
| iframe building→live lifecycle for audience UX | Component authoring — read the mockup-sandbox skill |
| Section label shape conventions | Extracting existing components — read mockup-extract |
| focusCanvasShapes as a presentation close | Graduating mockups to production — read mockup-graduate |
Coordinate system
- Origin
(0, 0)is top-left. - Positive
xgoes right, positiveygoes down. - Artifact frames are pre-placed by Replit and cannot be resized or deleted — they can be moved.
- Design/mockup iframe sizes are set by you and can be anything.
The two board modes
Building mode — iframes scattered wherever the last task dropped them. The canvas is a work surface, not a presentation. This is fine while building.
Presentation mode — iframes in deliberate zones with section labels, consistent gutters, and a focusCanvasShapes call at the end that pans the audience to the finished layout. Switch to this before a demo, judge review, or designathon submission.
Why this matters. A canvas with 11 frames in random positions looks unfinished even when the work is excellent. A canvas where a judge can scan Hero → Spec → Gameplay → Mobile → Storybook in one sweep communicates craft.
Layout planning — do this before touching the canvas
Before issuing any applyCanvasActions calls, write down:
What ships with it
3 files 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.
- 5d ago First seen · 269 lines · 105 tokens per session scan A ac8c712d39f6
okhp3-replit-canvas-board is a skill published in the GitHub repository OKHP3/skillz (3 stars, last pushed yesterday), licensed MIT. It adds 105 tokens to every session and 2,733 once invoked, about $0.0005 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 2026-09-05.
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