Borrowing it
Nothing to install: this file belongs to osauer/canary. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/osauer/canary/main/.agents/skills/canary-preview/SKILL.mdgit clone --depth 1 https://github.com/osauer/canaryWrote 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/osauer/canary/canary-preview)<a href="https://agentmods.dev/skills/osauer/canary/canary-preview"><img src="https://agentmods.dev/badge/skills/osauer/canary/canary-preview.svg" alt="Measured on agentmods" 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 | $0.00084 | $0.00437 |
| Opus 5 | $0.00042 | $0.00218 |
| Sonnet 5 | $0.00017 | $0.00087 |
| Haiku 4.5 | $0.00008 | $0.00044 |
Grade A, and why
canary-preview 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 8d 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.
What it actually says
Canary preview
Open the isolated Canary SPA at http://127.0.0.1:8766/. Never adopt, kill,
restart, or bind the shared LAN host on 0.0.0.0:8765; it belongs to the
phone-paired app.
-
Reuse an already-open tab or preview process for that exact URL. Do not launch a duplicate.
-
Otherwise start this direct command in a long-running terminal session and keep it alive:
canary app --addr 127.0.0.1:8766 --public-url http://127.0.0.1:8766 --state-dir /tmp/ibkr-codex-preview-app-state-8766 --preview-read-grant -
Open
http://127.0.0.1:8766/in a Codex browser panel. Prefer the Codex app open-panel tool; do not load browser automation merely to show the page. -
Stop when the panel is open. No pairing, navigation beyond
/, page reads, screenshots, or console inspection. Report success in one line.
The --preview-read-grant flag exposes only read routes to an unpaired
loopback browser. Never submit broker writes from a browser.
The preview serves the installed binary, not loose source. After editing
web/app, run make install, stop only this skill's long-running preview
session, and launch it again. A blank page with no console errors usually means
the isolated server is no longer running; restart this preview session before
debugging the SPA.
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.
- 8d ago First seen · 34 lines · 84 tokens per session scan A 5fa990bfd2eb
canary-preview is a skill published in the GitHub repository osauer/canary (8 stars, last pushed yesterday), licensed MIT. It adds 84 tokens to every session and 437 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 2026-08-31.
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