A coding agent for the core engine of a media-editing project. Its work includes the domain model, timeline calculations, project storage, analysis, platform checks, and FFmpeg processing; FFmpeg is a tool for reading, transforming, and exporting media.

Use it to change timeline math, project persistence and staging, analysis, platform checks, FFmpeg filter graphs, CPU handling, or speech-transcription support.

It directs engine changes to the part of the project that owns media-processing logic and project data. This keeps such work separate from changes to the editor interface.

How OrellBuehler/kerf configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to OrellBuehler/kerf. 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/OrellBuehler/kerf/main/.claude/agents/engine.md

Clone the repo

git clone --depth 1 https://github.com/OrellBuehler/kerf

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/orellbuehler/kerf/engine/github.svg)](https://agentmods.dev/agents/orellbuehler/kerf/engine)

Your own site

<a href="https://agentmods.dev/agents/orellbuehler/kerf/engine"><img src="https://agentmods.dev/badge/agents/orellbuehler/kerf/engine/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/orellbuehler/kerf/engine"><img src="https://agentmods.dev/badge/agents/orellbuehler/kerf/engine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 686 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00074	$0.00686
Opus 5.5	$0.00030	$0.00274
Sonnet 5.5	$0.00015	$0.00137
Haiku 4.5	$0.00007	$0.00069

Measured 29d ago against content hash dc622d823369, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

engine 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 29d 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/agents/engine.md · 50 lines

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.

Read it on GitHub

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.

29d ago Changed dc622d823369
1mo ago First seen · 50 lines · 74 tokens per session scan A aa60ba6ddb3d

Subscribe to this mod's changes

engine is an agent published in the GitHub repository OrellBuehler/kerf (12 stars, last pushed yesterday), with no licence file. It adds 74 tokens to every session and 686 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-01.

Creative and media LLM ai ai-video-editing claude desktop-app ffmpeg

engine next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
engineOrellBuehler/kerf	Agent	12	yesterday	none	A	74	Claude Code
trellis-checkfy-agent/fyagent	Agent	218	yesterday	none	A	47	Claude Code, Cursor
trellis-implementfy-agent/fyagent	Agent	218	yesterday	none	A	51	Claude Code, Cursor
trellis-researchfy-agent/fyagent	Agent	218	yesterday	none	A	38	Claude Code, Cursor
checkfy-agent/fyagent	Agent	218	yesterday	none	A	34	Claude Code
implementfy-agent/fyagent	Agent	218	yesterday	none	A	28	Claude Code
loop-verifiereli-labz/Godcoder	Agent	167	2mo ago	none	A	25	Claude Code

kerf: Agent for Claude Code