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 Cassette-Editor/oh-my-cassette --skill cassette-video-editgit clone --depth 1 https://github.com/Cassette-Editor/oh-my-cassetteWrote 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/cassette-editor/oh-my-cassette/cassette-video-edit)<a href="https://agentmods.dev/skills/cassette-editor/oh-my-cassette/cassette-video-edit"><img src="https://agentmods.dev/badge/skills/cassette-editor/oh-my-cassette/cassette-video-edit/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/cassette-editor/oh-my-cassette/cassette-video-edit"><img src="https://agentmods.dev/badge/skills/cassette-editor/oh-my-cassette/cassette-video-edit.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 | $0.00155 | $0.03157 |
| Opus 5 | $0.00077 | $0.01579 |
| Sonnet 5 | $0.00031 | $0.00631 |
| Haiku 4.5 | $0.00015 | $0.00316 |
Grade A, and why
cassette-video-edit 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 12d 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.
This is a copy
100% identical to cassette-video-edit — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 215 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Oh My Cassette local workflow
Cassette edits the media; you carry the messages. The cassette MCP server is a local stdio child
process that opens no port and talks directly to the separate Cassette backend. Do not start or
depend on the separate FastAPI web-demo server for this workflow — that is a different adapter.
This is the canonical workflow for every supported MCP host, including Codex, Claude Code, Hermes,
and OpenCode.
Two details live outside this file to keep it short. Read them when they apply:
references/auth.md— anyauth_*error, or the user is not signed in on this machine.references/music.md— any Jamendo/BGM request orjamendo_*error.references/previews.md— showing a timeline, contact sheet, or storyboard, and the plan-review pause.
Courier doctrine
You are a courier between the user and the Cassette agent, not an editor or a brief writer.
- Pass the user's editing words to
cassette_run_jobasmessageVERBATIM. Never rewrite, optimize, summarize, translate, or expand them. The agent is the creative brain and it reads the session's uploaded media itself, so a "helpfully" rewritten instruction only throws away detail the user chose and the agent could have used. - Relay the agent's questions and plans back verbatim too. You add exactly three things: the timeline delta, the version numbers, and any validated artifact path.
- Do not call
cassette_make_prompt. It is a legacy brief builder, kept only so the tool-name set stays stable. - Do not interrupt an edit to ask about model selection, optimization, or BGM. A fresh session uses
GPT-5.6 Luna with
xhighthinking. Open the model picker only when the user explicitly invokes the host'scassette-modelcommand/skill or asks in natural language to view or change it.
Safety and identity
- Only files inside the active host project roots or explicitly configured media roots are
ingestible. On
source_path_not_allowed, ask the user to move the file into the project or to rerun the private setup command with--allowed-root. Do not go hunting for a path that works. - Keep the returned
session_idandjob_id. Sessions are isolated by default; hand one to another host only when the user deliberately asks for a Codex or Claude handoff. - Use only paths and resource links returned in
artifacts. Never invent an export path or ask the MCP runtime to expose another local file.
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.
- 12d ago First seen · 215 lines · 155 tokens per session scan A ad47e8bf3aa6
cassette-video-edit is a skill published in the GitHub repository Cassette-Editor/oh-my-cassette (132 stars, last pushed 2d ago), licensed MIT. It adds 155 tokens to every session and 3,157 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cassette-video-edit, differing in 0 lines, and is treated as a copy.
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