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.
npx skills add Niall-Young/Canvasight --skill canvasight-opengit clone --depth 1 https://github.com/Niall-Young/CanvasightWrote 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/skills/niall-young/canvasight/canvasight-open)<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.
<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>- NVIDIA SkillSpector pass
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 5.5 | $0.00030 | $0.00368 |
| Sonnet 5.5 | $0.00015 | $0.00184 |
| Haiku 4.5 | $0.00008 | $0.00092 |
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 1mo 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 — 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_IDand current working directory from the shell. Require both a non-empty thread id and an absolute project path; pass them asthreadIdandprojectPath. - If the tools are not callable, use
tool_searchforcanvasight open_canvasight await_canvasight_widget_ready render_canvasight_canvas_widget. - Call
open_canvasightexactly once for this user-level open action, pass the explicitprojectPath, and retain the complete provisional result. Userender_canvasight_canvas_widgetonly 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.scatterdocument. - Read
sessionIdandopenAttemptIdfrom the retained result'sstructuredContent. Tool completion is not evidence that the canvas rendered. - Immediately call
await_canvasight_widget_readywith those two ids and the samethreadId. Treat these two MCP calls as one indivisible user-level open action. Do not callopen_canvasightagain to recoversessionIdoropenAttemptId. If the first result or either id was lost, mark the openingunverified, do not reopen, and route diagnosis throughcanvasight-troubleshooting. - Report the canvas as opened or ready only when the result has
status: "ready",verified: true,displayMode: "fullscreen", and all ofreactMounted,projectHydrated,canvasRendered, andcanvasVisibleset totrue. - For
timeout,failed, missing identity/evidence, or a non-fullscreen instance, reportopenAttemptId,widgetInstanceId,stage, anderror, keep the native open resultunverified, and route diagnosis throughcanvasight-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.
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.
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.
- 1mo ago First seen · 40 lines · 76 tokens per session scan A 4a4c19b6a94f
canvasight-open is a skill published in the GitHub repository Niall-Young/Canvasight (216 stars, last pushed 1mo ago), licensed MIT. It adds 76 tokens to every session and 921 once invoked, about $0.0003 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.
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