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 Dannykkh/skill-olympus --skill excalidrawgit clone --depth 1 https://github.com/Dannykkh/skill-olympusWrote 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/dannykkh/skill-olympus/excalidraw)<a href="https://agentmods.dev/skills/dannykkh/skill-olympus/excalidraw"><img src="https://agentmods.dev/badge/skills/dannykkh/skill-olympus/excalidraw.svg" alt="Measured on agentmods" 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 | $0.00057 | $0.00918 |
| Opus 5 | $0.00028 | $0.00459 |
| Sonnet 5 | $0.00011 | $0.00184 |
| Haiku 4.5 | $0.00006 | $0.00092 |
Grade C, and why
excalidraw scanned grade C 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 3d 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.
Tells the agent never to refusehighAnti-refusal
Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.
context using the bounded fallback below. Never refuse an Excalidraw task solely because subagents are absent. How it starts
The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excalidraw Context-Isolated Operations
Excalidraw JSON has high token cost and low semantic density. Keep raw element metadata out of the main conversation when possible, but do not make delegation a prerequisite for completing the task.
Role Contract
Choose the role by side effect, not by a vendor-specific tool name.
| Operation | Semantic role | Contract |
|---|---|---|
| Read, explain, compare | Read-only explorer | Read target diagrams; return only labels, relationships, and evidence. Do not write files. |
| Create, modify | General writer | Own only the designated output files; preserve unrelated elements; validate written JSON; report changed paths and checks. |
Use the current CLI's built-in explorer or general worker that satisfies the contract. Do not require a
custom agent name or assume a particular Task/spawn argument schema. The main context owns scope,
acceptance criteria, final verification, and the user-facing explanation.
If native delegation is unavailable or fails, perform the same operations sequentially in the main context using the bounded fallback below. Never refuse an Excalidraw task solely because subagents are absent.
Routing
- Determine whether the request is read-only or writes a diagram.
- Prefer native delegation when the file is large, multiple diagrams are involved, or the main context is already crowded.
- Give the selected role exact input paths, allowed output paths, and the required return format.
- Verify the result in the main context without importing raw JSON into the final response.
Delegated Task Templates
Read or Explain
Role: read-only explorer
Task: Explain [file.excalidraw.json].
Extract text labels and relationships. Ignore visual metadata unless it changes meaning.
Return:
- components or steps
- connections and direction
- important visual grouping
- evidence by element label or id when useful
Do not modify files or return raw JSON.
Compare
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.
- 3d ago First seen · 108 lines · 57 tokens per session scan C 93ace3f3e8fa
excalidraw is a skill published in the GitHub repository Dannykkh/skill-olympus (5 stars, last pushed yesterday), licensed MIT. It adds 57 tokens to every session and 918 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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