ffvoice-engine: Skill for Claude Code

.claude/skills/ffvoice-transcription/SKILL.md

ffvoice-transcription is a skill for Claude Code from chicogong/ffvoice-engine. It costs 78 tokens per session (1,065 once invoked), scanned A, original, MIT.

A set of instructions for using ffvoice to convert speech to text offline, create subtitles, identify speakers, and caption live microphone input. Speaker diarization means marking who spoke when.

In plain words
What is it for?
Use it to transcribe audio files, produce SRT, VTT, or JSON captions, separate speakers, caption live speech, or list audio devices.
Why use it?
It keeps audio on the device and explains how to use the engine through its agent tools or command line, including first-time model setup.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

This is chicogong/ffvoice-engine's own configuration. It tells Claude Code how to work on ffvoice-engine itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ffvoice-engine configures →

Reuse

Borrowing it

Nothing to install: this file belongs to chicogong/ffvoice-engine. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/chicogong/ffvoice-engine/master/.claude/skills/ffvoice-transcription/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/chicogong/ffvoice-engine

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site
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Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,065 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00078 $0.01065
Opus 5 $0.00039 $0.00532
Sonnet 5 $0.00016 $0.00213
Haiku 4.5 $0.00008 $0.00106

Measured 10d ago against content hash 7d65ad9efcc5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

ffvoice-transcription 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 10d 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.

.claude/skills/ffvoice-transcription/SKILL.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ffvoice — offline speech transcription & diarization

ffvoice is an offline speech toolkit: speech-to-text (Whisper), speaker diarization ("who spoke when"), and live captioning. Everything runs locally — no audio leaves the machine, no API key.

Preconditions

Check ffvoice is installed: pip show ffvoice.

  • Not installed → pip install 'ffvoice[mcp]'. For speaker diarization add the extra: pip install 'ffvoice[mcp,diarization]'.
  • Models (Whisper weights, diarization models) download automatically to ~/.cache/ffvoice/ on first use — no manual setup. The first run of a given model is slower while it downloads.

Two ways to use it — pick one

  1. MCP server — if an ffvoice MCP server is connected (tools named transcribe_file, list_audio_devices, etc. are available), call those tools directly. Preferred path for agent use.
  2. CLI — otherwise drive the ffvoice command-line tool. Works for batch/scripted use without an MCP connection.

MCP tools (when the ffvoice MCP server is connected)

Tool Use it for
transcribe_file Transcribe one audio file → text + timestamped segments. Supports language, model size, word timestamps.
transcribe_file_with_diarization Transcribe and label speakers — every segment gets a speaker_id. Use when the user asks "who said what".
capture_and_transcribe Record from a microphone for N seconds and transcribe it.
capture_and_caption Live streaming captions from the microphone (partial + final events).
list_audio_devices Enumerate audio input devices. Call this FIRST whenever a microphone task needs a device index.

Workflow:

  • File transcription → confirm the path exists, then transcribe_file (or transcribe_file_with_diarization when the user wants speakers).
  • Microphone → list_audio_devices first, then capture_and_transcribe or capture_and_caption with the chosen device.

CLI usage (ffvoice command)

The CLI uses flag-style options (not subcommands). Confirm with ffvoice --help. Common forms:

Read the full file on GitHub · 94 lines

Files

What ships with it

2 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.

Changes

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.

  1. 10d ago First seen · 94 lines · 78 tokens per session scan A 7d65ad9efcc5

Subscribe to this mod's changes

ffvoice-transcription is a skill published in the GitHub repository chicogong/ffvoice-engine (3 stars, last pushed 3mo ago), licensed MIT. It adds 78 tokens to every session and 1,065 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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