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canvai: Instructions file for Claude Code

CLAUDE.md

canvai CLAUDE.md is an instructions file for Claude Code from chuck00lin/canvai. It costs 709 tokens per session, scanned A, original, MIT.

Repository instructions for Canvai, an open-source visual discussion board that uses JSON Canvas files to store diagrams and discussions. They define project rules, design decisions, documentation language, and data-preservation requirements.

In plain words
What is it for?
Guiding changes to the Canvai server, web client, canvas files, documentation, and tests while preserving unknown data and keeping design decisions consistent.
Why use it?
They give coding agents the context needed to avoid putting private notes in the public repository or breaking the file format and layout rules.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is chuck00lin/canvai's own configuration. It tells Claude Code how to work on canvai itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything canvai configures →

not rated 3repo 3mo ago A scan 709 tokens original MIT
View source ↗ chuck00lin/canvai
Reuse

Borrowing it

Nothing to install: this file belongs to chuck00lin/canvai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/chuck00lin/canvai/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/chuck00lin/canvai

Made for: Claude Code.

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Per session 709 This file is loaded in full into every session.
When invoked 709 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00709 $0.00709
Opus 5.5 $0.00284 $0.00284
Sonnet 5.5 $0.00142 $0.00142
Haiku 4.5 $0.00071 $0.00071

Measured 2mo ago against content hash 03c30f544c88, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

canvai CLAUDE.md 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 2mo 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.

CLAUDE.md · 25 lines

How it starts

The opening of the file, as written. The whole thing — 25 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — canvai

Repo-native visual discussion boards for humans + AI agents. JSON Canvas files as source of truth, thin local server (watcher/WebSocket/MCP/ELK layout), React Flow web client, Obsidian as optional client.

Ground rules

  • This is a PUBLIC open-source repo. Internal discussion notes, meeting transcripts, experiments, and scratch tests never go here — they live in ../canvai-internal/ (outside this repo). When in doubt, put it there.
  • Public docs and code comments are English. README.zh-TW.md is the one translated file; keep it in sync on substantive README changes.
  • docs/design.md is the source of truth for design decisions (numbered D1–D5). Don't contradict it silently — change it (and say why) or open an issue.

Non-negotiable invariants (from the design doc)

  1. .canvas round-trips preserve unknown fields (Advanced Canvas compatibility) and mirror each file's serialization dialect to keep git diffs minimal. Test-enforced: packages/canvas-kit/test/io.test.ts (byte-identical round-trips) and the hub e2e.
  2. Agents never compute absolute coordinates — agent-reachable write paths go through semantic ops + ELK auto-layout; human-dragged nodes are pinned and auto-layout routes around them.
  3. Mermaid is I/O only (embed in cards, one-way import/explode) — never the persistence format. Rationale: design doc D2.
  4. Concurrency stays turn-based (atomic writes, last-write-wins, event feed) until Phase 2; no CRDT before then.

Status & layout

  • Current phase: Phase 0 + Phase 1 core shipped — packages/canvas-kit (round-trip io, projection, ops, diff, pinned-aware ELK layout), packages/hub (MCP stdio server + serve mode: watcher/WebSocket/REST), packages/web (React Flow client; Vite build, needs DOM lib so it has its own tsconfig and is excluded from the root one). The two hub processes coordinate purely through files (.canvas, .canvai/state.json, .canvai/events.jsonl). Next: field-test the live loop, measure the token bill of a real discussion turn, then Phase 2 (Yjs, presence, mermaid explode, @agent pins).
  • No build step for hub/kit: Node ≥ 23.6 runs the TypeScript directly (erasable syntax only — no enums/namespaces; relative imports use .ts extensions). Web builds with npm run web:build. npm test (vitest, includes MCP + serve e2e) and npm run typecheck must stay green.
  • Dev commands: npm run serve (HTTP/WS on 5199), npm run web:dev (Vite dev server proxying to 5199), npm run hub (MCP stdio).
  • Dogfooding: .mcp.json registers the hub for this repo; discuss/roadmap.canvas is a live board — feel free to update it via apply_ops when the roadmap changes.
  • License MIT. Do not vendor code from GPL projects (notably obsidian-advanced-canvas); format compatibility only.

Read the full file on GitHub · 25 lines

Changes

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.

  1. 2mo ago First seen · 25 lines · 709 tokens per session scan A 03c30f544c88

Subscribe to this mod's changes

canvai CLAUDE.md is an instructions file published in the GitHub repository chuck00lin/canvai (3 stars, last pushed 3mo ago), licensed MIT. It adds 709 tokens to every session, about $0.0028 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 2026-08-31.

Claude Codeai-agentscanvasjsoncanvasmcpmodel-context-protocol
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