Is Plan Canvas safe and trustworthy?

tashan scores Plan Canvas on public evidence — tashan score 48.0/100, it is currently active. Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install Plan Canvas?

Drop the skill folder into ~/.claude/skills/ (user scope) or .claude/skills/ (project scope).

Who maintains Plan Canvas?

30 GitHub contributors, source: reevesc88/ECC.

‹ The Index

Plan Canvas

skill

Open plans and HTML artifacts in a local browser canvas where the human annotates elements, chats, and approves or requests changes without leaving the page. Use when presenting a plan for review, or when feedback like "move this, change that" is easier pointed at than typed.

Works with: Claude Code (native) · Cursor, Codex CLI (manual)
native: this artifact type is that client's own format

Category: Design — see all ranked ›

Install (Claude Code):

cp -r plan-canvas ~/.claude/skills/

tashan score: 48.0
Adoption: 2 repos
Upkeep: 96.0
Freshness: 91.0
Evidence coverage: 84% of the inputs this score can use — the rest are unknown, and the score is discounted for it
Health: active
Contributors: 30
License: MIT

Security audit

Not scanned yet. We audit npm-published capabilities for known advisories, install-time scripts and permission surface; this one has no npm package we can resolve, or has not reached the queue.

Its own instructions

Its SKILL.md says when to use it, shows worked examples and covers setup.

Read from the capability’s own SKILL.md. This is not a grade and does not compare to the instruction-depth verdict on an MCP server — a skill has no tools to document, so that rubric does not apply to it.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

Plan Canvas scores 48 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

Every score since we started measuring, for any capability
The named replacement when something you run is dying — not just that it is
tashan doctor over the config you already have, on your machine

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Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/skill-reevesc88-plan-canvas.svg)](https://tashan.sh/capability/skill-reevesc88-plan-canvas.html)

source ↗ · skill:reevesc88/plan-canvas

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-09-12 · scorer s5 · how · something wrong here?