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-troubleshootinggit 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-troubleshooting)<a href="https://agentmods.dev/skills/niall-young/canvasight/canvasight-troubleshooting"><img src="https://agentmods.dev/badge/skills/niall-young/canvasight/canvasight-troubleshooting/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-troubleshooting"><img src="https://agentmods.dev/badge/skills/niall-young/canvasight/canvasight-troubleshooting.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 | $0.00108 | $0.00574 |
| Opus 5 | $0.00054 | $0.00287 |
| Sonnet 5 | $0.00022 | $0.00115 |
| Haiku 4.5 | $0.00011 | $0.00057 |
Grade A, and why
canvasight-troubleshooting 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 11d 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 — 25 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Canvasight Troubleshooting
Use this skill for Canvasight runtime, install, native readiness, and recovery problems.
Checklist
- Reproduce the normal path with the current
CODEX_THREAD_ID: callopen_canvasight, capturesessionIdandopenAttemptId, then callawait_canvasight_widget_readywith both values and the samethreadId. - Treat only verified fullscreen readiness with all render evidence true as success. Otherwise record attempt/session/instance identity, display mode, stage, render evidence, error, and timestamp before changing anything.
- Classify the failing layer: tool discovery/live MCP transport, session/task binding, widget bootstrap/React mount, initial session API, host bridge/Run delivery, browser fallback, daemon, installed cache, or
.scatterdata. - If required tools are missing, call
tool_searchforcanvasight open_canvasight await_canvasight_widget_ready render_canvasight_canvas_widgetbefore declaring them unavailable. - If a callable Canvasight tool returns
Transport closed, reportcanvasight_mcp_transport_closedand inspectmcp-lifecycle.logwhen available. If the plugin version changed while Codex Desktop was running, reload/restart the host before creating and tagging a new task; a new task alone can retain the old app-level registry. Do not substitute browser fallback. - If the result reports a missing or mismatched task id, reopen with the active task's exact
CODEX_THREAD_ID. - Verify the installed source and version with
codex plugin listwhen behavior is stale. When an install or upgrade changes the resolved version, reload/restart the Codex host, then create a new task and tag the plugin again; creating a task alone is not a sufficient refresh guarantee. - Use browser fallback only to isolate browser/daemon behavior. It cannot verify native readiness or native Run delivery.
- Run the narrowest relevant automated checks, then perform the real native-host acceptance gate. Automated checks remain supporting evidence.
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.
- 11d ago First seen · 25 lines · 108 tokens per session scan A 7674db8bbf46
canvasight-troubleshooting is a skill published in the GitHub repository Niall-Young/Canvasight (210 stars, last pushed 14d ago), licensed MIT. It adds 108 tokens to every session and 574 once invoked, about $0.0005 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.
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