Borrowing it
Nothing to install: this file belongs to valeriyproklov/excalidraw-zephy. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/valeriyproklov/excalidraw-zephy/main/CLAUDE.mdgit clone --depth 1 https://github.com/valeriyproklov/excalidraw-zephyWrote 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/instructions/valeriyproklov/excalidraw-zephy/claude-md)<a href="https://agentmods.dev/instructions/valeriyproklov/excalidraw-zephy/claude-md"><img src="https://agentmods.dev/badge/instructions/valeriyproklov/excalidraw-zephy/claude-md/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/instructions/valeriyproklov/excalidraw-zephy/claude-md"><img src="https://agentmods.dev/badge/instructions/valeriyproklov/excalidraw-zephy/claude-md.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 | $0.05171 | $0.05171 |
| Opus 5 | $0.02586 | $0.02586 |
| Sonnet 5 | $0.01034 | $0.01034 |
| Haiku 4.5 | $0.00517 | $0.00517 |
Grade A, and why
excalidraw-zephy CLAUDE.md 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 10d 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.
curl -s -H "X-Admin-Key: $KEY" -H "Content-Type: application/json" \ How it starts
The opening of the file, as written. The whole thing — 313 lines — stays where its author put it; the contents beside it link to each section on GitHub.
excalidraw-zephy — self-hosted multi-room Excalidraw
A fork of yctimlin/mcp_excalidraw patched for multi-room support, file-based
persistence, an admin API, a private dashboard, and Cloudflare-Tunnel public
exposure. Designed to give one user (and friends with share links) the
collaborative parts of Excalidraw+ without paying for it, plus an MCP server
so a Claude Code agent can drive any board.
Lives on Zephy (Ubuntu 24.04 home server, 100.121.176.61 over Tailscale). Public URL: https://draw.proklov.dev via Cloudflare Tunnel.
Where things are
| Path / URL | |
|---|---|
| Local repo (Mac dev) | ~/Documents/projects/excalidraw-zephy |
| Zephy deploy | /home/val/excalidraw-zephy |
| Public canvas | https://draw.proklov.dev/r/<room-id> |
| Public MCP endpoint | https://draw.proklov.dev/mcp (bearer-token auth from dashboard's /api/tokens UI) |
| Admin dashboard | https://draw-admin.proklov.dev/ — behind Cloudflare Access (Google IdP, val's Gmail only). LAN fallback: http://zephy:5000/. |
| Canvas REST API | https://draw.proklov.dev/api/r/<room-id>/... |
| Canvas WebSocket | wss://draw.proklov.dev/ws/r/<room-id> |
| Admin API (tailnet only) | http://zephy:3000/api/admin/rooms (X-Admin-Key required) |
| Admin key | .env on Zephy at ~/excalidraw-zephy/.env (mode 0600) |
| Persistent state | docker named volume excalidraw-zephy_canvas-data → /app/data/<room-id>.json |
| Tunnel config | /home/val/.cloudflared/config.yml + /etc/systemd/system/cloudflared.service |
| CF Access apps | draw-admin.proklov.dev (Google IdP, allow [email protected], 72h session). The Access app on draw.proklov.dev was retired so /r/<id> and /mcp stay public. |
One GitHub repo (as of 2026-07 — the repos were merged):
Val4evr/excalidraw-zephy— canvas server + dashboard- the MCP server (
src/index.ts, shared by the stdionpxinstall and the HTTP/mcpendpoint) - the headless renderer sidecar (
renderer/).
- the MCP server (
Val4evr/excalidraw-mcp— DEPRECATED, folded into this repo. Install the MCP withnpx -y --package=github:Val4evr/excalidraw-zephy excalidraw-mcp.
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.
- 10d ago First seen · 313 lines · 5,171 tokens per session scan A 518da3e2bc39
excalidraw-zephy CLAUDE.md is an instructions file published in the GitHub repository valeriyproklov/excalidraw-zephy (0 stars, last pushed 2mo ago), licensed MIT. It adds 5,171 tokens to every session, about $0.0259 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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