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 Cecilapp/Cecil --skill cecil-themegit clone --depth 1 https://github.com/Cecilapp/CecilWrote 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/cecilapp/cecil/cecil-theme)<a href="https://agentmods.dev/skills/cecilapp/cecil/cecil-theme"><img src="https://agentmods.dev/badge/skills/cecilapp/cecil/cecil-theme/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/cecilapp/cecil/cecil-theme"><img src="https://agentmods.dev/badge/skills/cecilapp/cecil/cecil-theme.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 | $0.00031 | $0.07869 |
| Opus 5.5 | $0.00012 | $0.03148 |
| Sonnet 5.5 | $0.00006 | $0.01574 |
| Haiku 4.5 | $0.00003 | $0.00787 |
Grade C, and why
cecil-theme scanned grade C with 2 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 today.
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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf layouts # make sure the theme's layouts are used Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -LO https://cecil.app/cecil.phar The source is not reproduced here
Licensed EUPL-1.2
The repository is licensed EUPL-1.2, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- today Changed · +1 lines ee973a770fda
- yesterday Changed f2fb2e18ff7d
- 5d ago Changed · +230 lines 4fc93f791384
- 15d ago First seen · 508 lines · 31 tokens per session scan C c5be5f9b67b8
cecil-theme is a skill published in the GitHub repository Cecilapp/Cecil (298 stars, last pushed today), licensed EUPL-1.2. It adds 31 tokens to every session and 7,869 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-01.
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