Claude Canvas is a terminal user-interface toolkit that gives Claude Code an interactive display separate from its main session. It is for spawning terminal interfaces for tasks such as managing email, calendars, flights, and bookings.
Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add dvdsgl/claude-canvas/plugin install canvasWrote 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/commands/dvdsgl/claude-canvas/canvas)<a href="https://agentmods.dev/commands/dvdsgl/claude-canvas/canvas"><img src="https://agentmods.dev/badge/commands/dvdsgl/claude-canvas/canvas/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/commands/dvdsgl/claude-canvas/canvas"><img src="https://agentmods.dev/badge/commands/dvdsgl/claude-canvas/canvas.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 | $0.00015 | $0.00517 |
| Opus 5.5 | $0.00006 | $0.00207 |
| Sonnet 5.5 | $0.00003 | $0.00103 |
| Haiku 4.5 | $0.00002 | $0.00052 |
Grade A, and why
canvas 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Canvas Command
Spawn and control interactive terminal displays (TUIs) in tmux split panes.
Usage
When the user invokes /canvas, help them spawn the appropriate canvas type based on their needs.
Workflow
Step 1: Determine Canvas Type
Ask what kind of canvas the user needs:
- Calendar - Display events or pick meeting times
- Document - View or edit markdown content
- Flight - Compare flights and select seats
Step 2: Gather Configuration
Based on the canvas type, collect the necessary configuration:
Calendar:
- Events to display (title, start/end times)
- For meeting picker: multiple calendars with busy times
- Slot granularity (15/30/60 minutes)
Document:
- Markdown content to display
- Document title
- Edit mode or display-only
- Optional diff highlighting
Flight:
- Flight options (airline, times, prices)
- Seatmap configuration
- Origin/destination airports
Step 3: Spawn Canvas
Use the CLI to spawn the canvas:
cd ${CLAUDE_PLUGIN_ROOT}
bun run src/cli.ts spawn [type] --scenario [scenario] --config '[json]'
Examples:
# Calendar display
bun run src/cli.ts spawn calendar --config '{"events": [...]}'
# Meeting picker
bun run src/cli.ts spawn calendar --scenario meeting-picker --config '{"calendars": [...]}'
# Document editor
bun run src/cli.ts spawn document --scenario edit --config '{"content": "# Title", "title": "Doc"}'
# Flight booking
bun run src/cli.ts spawn flight --config '{"flights": [...]}'
Step 4: Handle Results
Wait for user interaction and handle the result:
- Selected: User made a selection (time slot, text, flight+seat)
- Cancelled: User pressed Escape or quit
- Error: Something went wrong
Requirements
- Must be running inside a tmux session
- Terminal should support mouse input for interactive scenarios
Skills Reference
Read these skills for detailed configuration options:
canvas- Overview and IPC communicationcalendar- Calendar events and meeting pickerdocument- Markdown rendering and text selectionflight- Flight comparison and seatmaps
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.
- 2mo ago First seen · 90 lines · 15 tokens per session scan A 51ec7f86e752
canvas is a command published in the GitHub repository dvdsgl/claude-canvas (1,516 stars, last pushed 10mo ago), licensed MIT. It adds 15 tokens to every session and 517 once invoked, about $0.0001 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 2026-08-30.
canvas compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| canvasdvdsgl/claude-canvas | Command | 1.5k | 10mo ago | MIT | A | 15 | Claude Code |
| wsdanielmiessler/LifeOS | Command | 20k | yesterday | MIT | A | 0 | Claude Code |
| cancel-ralphanthropics/claude-plugins-official | Command | 46k | yesterday | Apache-2.0 | A | 4 | Claude Code |
| engage.actionshypnguyen1209/offensive-claude | Command | 412 | 15d ago | MIT | A | 11 | Claude Code |
| focusData-Wise/claude-plugins | Command | 7 | yesterday | MIT | A | 0 | Claude Code |
| stuckData-Wise/claude-plugins | Command | 7 | yesterday | MIT | A | 0 | Claude Code |
| quickstartorq-ai/assistant-plugins | Command | 6 | 2d ago | MIT | A | 23 | Claude Code |