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 HK-hub/AgentSkills --skill excalidrawgit clone --depth 1 https://github.com/HK-hub/AgentSkillsWrote 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/hk-hub/agentskills/excalidraw)<a href="https://agentmods.dev/skills/hk-hub/agentskills/excalidraw"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/excalidraw/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/hk-hub/agentskills/excalidraw"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/excalidraw.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 | $0.00073 | $0.06743 |
| Opus 5 | $0.00036 | $0.03372 |
| Sonnet 5 | $0.00015 | $0.01349 |
| Haiku 4.5 | $0.00007 | $0.00674 |
Grade A, and why
excalidraw scanned grade A with 1 finding 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 8d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
metadata: {"version":"1.3.0","openclaw":{"requires":{"bins":["curl"]},"emoji":"🎨"}} This is a copy
100% identical to excalidraw — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 552 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excalidraw Diagrams
Overview
Generate .excalidraw JSON files and export to PNG/SVG.
Two export options:
- Kroki API (
curl) — zero install, SVG output only - excalidraw-brute-export-cli — local Firefox-based, PNG + SVG
Supported formats: PNG (local CLI only), SVG (both options). PDF is NOT supported.
When to Use
Explicit triggers: user says "画图", "diagram", "visualize", "flowchart", "draw", "架构图", "流程图"
Proactive triggers:
- Explaining a system with 3+ interacting components
- Describing a multi-step process or decision tree
- Comparing architectures or approaches side by side
Skip when: a simple list or table suffices, or user is in a quick Q&A flow
When NOT to use it — route elsewhere:
- Polished, precise diagrams, strict UML, or branded vendor icons → drawio.
- Diagrams-as-code in git, auto-laid-out from text → mermaid (general) or plantuml (UML).
- An infinite-canvas whiteboard or programmatic freehand strokes → tldraw.
Prerequisites
Option A: Kroki API (recommended — zero install, SVG only)
# Just needs curl (pre-installed on macOS/Linux/Windows Git Bash)
curl --version
No additional setup. SVG rendered via https://kroki.io.
Option B: Local CLI (required for PNG)
The CLI uses Firefox (not Chromium). Check and install:
npm install -g excalidraw-brute-export-cli
npx playwright install firefox
macOS patch (one-time, required):
CLI_MAIN=$(npm root -g)/excalidraw-brute-export-cli/src/main.js
sed -i '' 's/keyboard.press("Control+O")/keyboard.press("Meta+O")/' "$CLI_MAIN"
sed -i '' 's/keyboard.press("Control+Shift+E")/keyboard.press("Meta+Shift+E")/' "$CLI_MAIN"
Windows/Linux: No patch needed.
Workflow
- Check deps — use Kroki (curl) for SVG; use local CLI for PNG
- Plan — pick the visual metaphor (see Relationship-to-layout map), then the diagram type and color palette
- Generate — write
.excalidrawJSON file (section-by-section for large diagrams) - Export — run Kroki or CLI command
- Verify the render — view the exported PNG, fix any defects, re-export (see Verify the Render)
- Review loop — show the image to the user, apply the minimal
.excalidrawedit per request, re-export until approved (see Review Loop) - Report — tell user the output file path
What ships with it
2 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.
- 8d ago First seen · 552 lines · 73 tokens per session scan A f554c61a46a8
excalidraw is a skill published in the GitHub repository HK-hub/AgentSkills (6 stars, last pushed 25d ago), licensed MIT. It adds 73 tokens to every session and 6,743 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to excalidraw, differing in 0 lines, and is treated as a copy.
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