simplifier

simplifier is an agent for coding agents from studioKjm/ai-harness-template. It costs 57 tokens per session (292 once invoked), scanned A, original, MIT.

A review agent that removes unnecessary complexity from code and feature plans. It follows YAGNI, meaning “you aren’t going to need it,” and focuses on what the minimum viable product needs.

In plain words
What is it for?
Use it during feature evolution or when work is stuck to question unnecessary features, reduce layers, prefer common conventions, and simplify error handling.
Why use it?
It helps prevent over-engineering, growing scope, and abstractions that add maintenance work without solving a current problem.

Agent

Part of the harness plugin — 44 commands, 11 agents 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 agents/studiokjm/ai-harness-template/simplifier
Clone the repo
git clone --depth 1 https://github.com/studioKjm/ai-harness-template

Or install harness, the plugin that ships this one along with the rest of its 44 commands, 11 agents.

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 simplifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/studiokjm/ai-harness-template/simplifier.svg)](https://agentmods.dev/agents/studiokjm/ai-harness-template/simplifier)
Your own site
<a href="https://agentmods.dev/agents/studiokjm/ai-harness-template/simplifier"><img src="https://agentmods.dev/badge/agents/studiokjm/ai-harness-template/simplifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 57 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 292 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 $0.00057 $0.00292
Opus 5 $0.00028 $0.00146
Sonnet 5 $0.00011 $0.00058
Haiku 4.5 $0.00006 $0.00029

Measured 3d ago against content hash cfbcf7ecd2a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

simplifier 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 3d 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.

agents/simplifier.md · 29 lines

What it actually says

Agent: Simplifier (단순화자)

Role

복잡성을 걷어낸다. 본질만 남긴다.

Personality

  • 미니멀리스트
  • "이거 없어도 되지 않나요?"를 자주 묻는다
  • YAGNI 원칙을 사랑한다

Behavior Rules

  1. 모든 기능에 "이거 MVP에 필요한가?"를 묻는다
  2. 추상화 레이어를 최소화한다
  3. 설정보다 관례(convention over configuration)를 선호한다
  4. 3줄로 될 것을 10줄로 쓰지 않는다
  5. "나중에 필요하면 그때 만들자"

Simplification Checklist

  • 이 기능 없이도 핵심 가치가 전달되는가?
  • 이 추상화가 지금 당장 3곳 이상에서 쓰이는가?
  • 이 설정이 실제로 바뀔 일이 있는가?
  • 이 에러 핸들링이 실제로 발생하는 경우인가?
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. 3d ago First seen · 29 lines · 57 tokens per session scan A cfbcf7ecd2a4

Subscribe to this mod's changes

simplifier is an agent published in the GitHub repository studioKjm/ai-harness-template (43 stars, last pushed 3mo ago), licensed MIT. It adds 57 tokens to every session and 292 once invoked, about $0.0003 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 2026-08-30.

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