output-style

output-style is a skill for Claude Code from iBrain-BVBA/gutt-claude-code-plugin. It costs 144 tokens per session (1,909 once invoked), scanned A, original, MIT.

A reply-writing style that puts the useful answer first and ends with a concrete summary and one next action.

In plain words
What is it for?
Use it to structure coding-agent responses, show completed work, include estimates, rank limited lists, and state what remains open.
Why use it?
It reduces preambles, repeated explanations, vague lists, and unclear handoffs after work is completed.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the gutt-pro plugin — 11 skills, 10 commands, 2 agents, 5 hooks shipped together

Install

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.

agentmods
npx agentmods add skills/ibrain-bvba/gutt-claude-code-plugin/output-style
Any agent
npx skills add iBrain-BVBA/gutt-claude-code-plugin --skill output-style
Clone the repo
git clone --depth 1 https://github.com/iBrain-BVBA/gutt-claude-code-plugin

Made for: Claude Code.

Or install gutt-pro, the plugin that ships this one along with the rest of its 11 skills, 10 commands, 2 agents, 5 hooks.

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.

agentmods badge for output-style

README.md
[![agentmods](https://agentmods.dev/badge/skills/ibrain-bvba/gutt-claude-code-plugin/output-style.svg)](https://agentmods.dev/skills/ibrain-bvba/gutt-claude-code-plugin/output-style)
Your own site
<a href="https://agentmods.dev/skills/ibrain-bvba/gutt-claude-code-plugin/output-style"><img src="https://agentmods.dev/badge/skills/ibrain-bvba/gutt-claude-code-plugin/output-style.svg" alt="Measured on agentmods" height="20"></a>
Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,909 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00144 $0.01909
Opus 5 $0.00072 $0.00955
Sonnet 5 $0.00029 $0.00382
Haiku 4.5 $0.00014 $0.00191

Measured 6d ago against content hash 0aba4280dc68, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

output-style 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 6d 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.

gutt-core/skills/output-style/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Output style

Apply these to the reply you are writing. They shape the whole reply, and in particular the summary that closes a turn — the part the user actually reads and carries away.

The rules

The reply ends in two parts, in this order. Where the turn did something on the way — recorded a finding, migrated a store, changed a setting — account for it first. Then, always, the closing summary of the turn: what was delivered, what it means for the user, and what is still open. Give both where there was bookkeeping and the summary alone where there was not. Whatever sits at the bottom is what the user is left looking at, and it is the summary, never the bookkeeping.

That closing summary is not a verbatim echo of text already written above it, and not an account of what you just did — those are the two ways it goes wrong.

Work the turn had to do along the way is part of finishing it, not an interruption of it: no "returning to", no "the work this interrupted", no apology for the detour.

Style for the whole reply

Substance first, no preamble and no closing pleasantry. Restate state rather than assuming it carried. Show finished work concretely. Cap lists at five and rank them. Concrete estimates, not vague ones. Matter-of-fact about failures — cause, then fix. Close on one next action small enough to start now, where anything is still open.

The only thing this file contributes to a fired reason is the one-line pointer under What the hook injects below. No rule ships with it — the rules are stated here once, read when the skill loads, and cost nothing at fire time.

This list was the first thing measured on that question, and the numbers are worth quoting precisely rather than as a standing fact. evals/suites/capture_close round 4 scored the list inside the markers at 67% against 96% for the 878-character block without it, n=24: 335 characters that made the payload worse rather than merely longer. Both figures belong to that round and to an 878-character block this file no longer contains — round 5 put the same arm at 54% and did not reproduce the 96%. FINDINGS.md records what the measurement does and does not support; in particular it cannot separate dilution from the list being actively confusing, so "worse" is the finding and the mechanism is not.

Read the full file on GitHub · 146 lines

Files

What ships with it

1 file 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. 6d ago First seen · 146 lines · 144 tokens per session scan A 0aba4280dc68

Subscribe to this mod's changes

output-style is a skill published in the GitHub repository iBrain-BVBA/gutt-claude-code-plugin (5 stars, last pushed 3d ago), licensed MIT. It adds 144 tokens to every session and 1,909 once invoked, about $0.0007 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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