What is canvasight-open?

A procedure for opening or reconnecting the Canvasight visual workspace and checking that its native interface is actually ready.

Starting Canvasight, restoring a recent project, attaching the current task, and verifying that the canvas is rendered and usable.

It confirms that the correct project and page are open before other Canvasight actions are performed.

canvasight-open — Skill for Claude Code and Codex by Niall-Young

Install

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.

Any agent

npx skills add Niall-Young/Canvasight --skill canvasight-open

Clone the repo

git clone --depth 1 https://github.com/Niall-Young/Canvasight

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/niall-young/canvasight/canvasight-open/github.svg)](https://agentmods.dev/skills/niall-young/canvasight/canvasight-open)

Your own site

<a href="https://agentmods.dev/skills/niall-young/canvasight/canvasight-open"><img src="https://agentmods.dev/badge/skills/niall-young/canvasight/canvasight-open/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/niall-young/canvasight/canvasight-open"><img src="https://agentmods.dev/badge/skills/niall-young/canvasight/canvasight-open.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 921 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00076	$0.00921
Opus 5	$0.00038	$0.00461
Sonnet 5	$0.00015	$0.00184
Haiku 4.5	$0.00008	$0.00092

Measured 10d ago against content hash 4a4c19b6a94f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

canvasight-open 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 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.

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.

plugins/canvasight/skills/canvasight-open/SKILL.md · 40 lines

How it starts

The opening of the file, as written. The whole thing — 40 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Canvasight Open

Use this skill to open Canvasight through MCP and verify the real native widget runtime.

Native Open Workflow

Read the active task's CODEX_THREAD_ID and current working directory from the shell. Require both a non-empty thread id and an absolute project path; pass them as threadId and projectPath.
If the tools are not callable, use tool_search for canvasight open_canvasight await_canvasight_widget_ready render_canvasight_canvas_widget.
Call open_canvasight exactly once for this user-level open action, pass the explicit projectPath, and retain the complete provisional result. Use render_canvasight_canvas_widget only as a compatibility alias, never as a second attempt to recover identity. Do not rely on a thread lookup or daemon default to infer the project: an unreadable or archived task must never silently open another folder's .scatter document.
Read sessionId and openAttemptId from the retained result's structuredContent. Tool completion is not evidence that the canvas rendered.
Immediately call await_canvasight_widget_ready with those two ids and the same threadId. Treat these two MCP calls as one indivisible user-level open action. Do not call open_canvasight again to recover sessionId or openAttemptId. If the first result or either id was lost, mark the opening unverified, do not reopen, and route diagnosis through canvasight-troubleshooting.
Report the canvas as opened or ready only when the result has status: "ready", verified: true, displayMode: "fullscreen", and all of reactMounted, projectHydrated, canvasRendered, and canvasVisible set to true.
For timeout, failed, missing identity/evidence, or a non-fullscreen instance, report openAttemptId, widgetInstanceId, stage, and error, keep the native open result unverified, and route diagnosis through canvasight-troubleshooting.

Do not replace step 5 with resource reads, daemon health, build output, MCP smoke tests, browser fallback, or visual assumptions. Do not loop on ready timeouts or silently open localhost.

Read the full file on GitHub · 40 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

references/open-workflow.md 5.1 KB

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.

10d ago First seen · 40 lines · 76 tokens per session scan A 4a4c19b6a94f

Subscribe to this mod's changes

canvasight-open is a skill published in the GitHub repository Niall-Young/Canvasight (210 stars, last pushed 13d ago), licensed MIT. It adds 76 tokens to every session and 921 once invoked, about $0.0004 per session on Opus 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.

Design and UX

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A self-contained WebGL2 hero: thin-film interference over a crushed-foil surface whose palette shifts with the viewing angle; move the cursor to tilt the film.

nexu-io/open-design · 41 tokens

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OpenDesign + BYOK: choosing and wiring your own model, hands-on — cost, quality, and the routing decision. Built as a decision-grade AI literacy deck for engineers, IT, applied-AI teams.

nexu-io/open-design · 53 tokens

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16:9 HTML deck in tactical-telemetry / CRT-terminal taste. Deactivated-CRT charcoal slides, white-phosphor monospace, hazard-red accent, scanline overlay, ASCII syntax, density over decoration. Distilled from Leonxlnx/taste-skill brutalist-skill (Tactical Telemetry mode).

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canvasight-open