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 PIXARTSeu/Synapse --skill ffmpeggit clone --depth 1 https://github.com/PIXARTSeu/SynapseWrote 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/pixartseu/synapse/ffmpeg)<a href="https://agentmods.dev/skills/pixartseu/synapse/ffmpeg"><img src="https://agentmods.dev/badge/skills/pixartseu/synapse/ffmpeg/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/pixartseu/synapse/ffmpeg"><img src="https://agentmods.dev/badge/skills/pixartseu/synapse/ffmpeg.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 | $0.00038 | $0.01200 |
| Opus 5 | $0.00019 | $0.00600 |
| Sonnet 5 | $0.00008 | $0.00240 |
| Haiku 4.5 | $0.00004 | $0.00120 |
Grade C, and why
ffmpeg scanned grade C with 1 finding 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 7d 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/* The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
3 files 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.
- 7d ago First seen · 166 lines · 38 tokens per session scan C 391536e9356a
ffmpeg is a skill published in the GitHub repository PIXARTSeu/Synapse (9 stars, last pushed 15d ago), with no licence file. It adds 38 tokens to every session and 1,200 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
twitch-webhooks
Receive and verify Twitch EventSub webhooks. Use when setting up Twitch webhook handlers, debugging signature verification, handling the webhookcallbackverification challenge, or handling EventSub events like stream.online, stream.offline, channel.follow, channel.subscribe, and…
cloudinary-webhooks
Receive and verify Cloudinary webhooks (notifications). Use when setting up a Cloudinary notification receiver, verifying the x-cld-signature and x-cld-timestamp headers with the official cloudinary SDK, debugging Cloudinary signature verification failures, or handling notificationtype events like upload, eager…
om-system-extension
Extend installed Open Mercato modules through UMES enrichers, interceptors, mutation guards, widgets, menus, entity extensions, events, component/page replacements, and overrides. Use for "extend core", "add field/column/action", "hide page", "intercept API", "UMES", or "rozszerz moduł".
memstack-content-youtube-script
Use this skill when the user says 'YouTube script', 'video script', 'write script for YouTube', 'YouTube video outline', or is creating scripted content for a YouTube video with hooks, chapters, and CTAs. Do NOT use for TikTok/Reels short-form scripts or webinar presentations.
api-contract
A guide for defining and reviewing an API contract: the agreed shape of requests, responses, authentication, errors, and compatibility rules between services. It can also guide OpenAPI checks and contract testing, which verifies that systems follow those agreements.
ring:migrating-to-lib-observability
Migrating a Lerian Go app off lib-commons observability imports (deprecated shims or removed APIs) to lib-observability via a fixed mapping table, then bumps go.mod and validates the build; ring:backend-go applies the edits. Covers log/zap/runtime/assert, opentelemetry/tracing, HTTP middleware, context helpers, and…