A development helper that makes an existing Kerf engine operation available through the app's command interface and its MCP tool interface. MCP is a standard way for software tools to be called by an AI assistant; it also updates the TypeScript bridge, browser fallback, and shared types.

Use it after adding an operation to the engine, or when keeping the app, MCP tools, browser harness, and type definitions in sync.

It reduces the chance that the graphical app and the MCP interface expose different or incomplete versions of the same operation.

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/surface.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/surface/github.svg)](https://agentmods.dev/agents/orellbuehler/kerf/surface)

Your own site

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

Per session 70 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 613 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	$0.00070	$0.00613
Opus 5.5	$0.00028	$0.00245
Sonnet 5.5	$0.00014	$0.00123
Haiku 4.5	$0.00007	$0.00061

Measured 12d ago against content hash d14c295fcfb3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

surface 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.

.claude/agents/surface.md · 46 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.

12d ago Changed · +1 lines d14c295fcfb3
29d ago Changed · +1 lines 39bf69a5868d
1mo ago First seen · 44 lines · 70 tokens per session scan A 3a73b615c3a0

Subscribe to this mod's changes

surface is an agent published in the GitHub repository OrellBuehler/kerf (12 stars, last pushed yesterday), with no licence file. It adds 70 tokens to every session and 613 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.

Backend and APIs Frontend LLM ai ai-video-editing claude desktop-app ffmpeg

surface next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
surfaceOrellBuehler/kerf	Agent	12	yesterday	none	A	70	Claude Code
api-spec-writerclosedloop-ai/claude-plugins	Agent	123	yesterday	Apache-2.0	A	31	Claude Code
scg-mapperbearlike/Assistant	Agent	43	7d ago	MIT	A	48	Claude Code
java-proechoVic/blade-code	Agent	181	24d ago	MIT	A	44	Claude Code
api-documenterechoVic/blade-code	Agent	181	24d ago	MIT	A	43	Claude Code
checkfy-agent/fyagent	Agent	218	yesterday	none	A	34	Claude Code
implementfy-agent/fyagent	Agent	218	yesterday	none	A	28	Claude Code

kerf: Agent for Claude Code