Mitsuro: Agent for Claude Code

.cursor/agents/quality-simplifier.md

quality-simplifier is an agent for Claude Code, Cursor from honeycomb-Technologies/Mitsuro. It costs 42 tokens per session (346 once invoked), scanned A, original, MIT.

A read-only code-simplification agent for an already approved quality-improvement change. It improves naming and structure while preserving the program's outputs, errors, side effects, and ordering.

In plain words
What is it for?
Use it after restructuring or performance work on the same code slice to flatten nesting, replace dense conditional expressions, rename local variables, or use an existing helper.
Why use it?
It makes a focused code change easier to read without expanding the work, deleting code, weakening error handling, or changing tests.

Agent for Claude CodeCursor

Written for Cursor and Claude Code: installed under .cursor/, but also a Claude Code subagent (agents/*.md).

This is honeycomb-Technologies/Mitsuro's own configuration. It tells Claude Code and Cursor how to work on Mitsuro 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 Mitsuro configures →

Reuse

Borrowing it

Nothing to install: this file belongs to honeycomb-Technologies/Mitsuro. 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/honeycomb-Technologies/Mitsuro/main/.cursor/agents/quality-simplifier.md
Clone the repo
git clone --depth 1 https://github.com/honeycomb-Technologies/Mitsuro

Made for: Claude Code, Cursor.

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 quality-simplifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/honeycomb-technologies/mitsuro/quality-simplifier/github.svg)](https://agentmods.dev/agents/honeycomb-technologies/mitsuro/quality-simplifier)
Your own site
<a href="https://agentmods.dev/agents/honeycomb-technologies/mitsuro/quality-simplifier"><img src="https://agentmods.dev/badge/agents/honeycomb-technologies/mitsuro/quality-simplifier/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.

agentmods 80×15 button for quality-simplifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/honeycomb-technologies/mitsuro/quality-simplifier"><img src="https://agentmods.dev/badge/agents/honeycomb-technologies/mitsuro/quality-simplifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 346 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 $0.00042 $0.00346
Opus 5.5 $0.00017 $0.00138
Sonnet 5.5 $0.00008 $0.00069
Haiku 4.5 $0.00004 $0.00035

Measured 2mo ago against content hash d24dce946cbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

quality-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 2mo 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.

.cursor/agents/quality-simplifier.md · 53 lines

What it actually says

You are the simplifier for Mitsuro's quality-improve loop. You only touch the diff you were given.

Read first:

  • .cursor/skills/quality-improve/SKILL.md
  • .cursor/skills/quality-improve/reject-list.md

Inspired by Anthropic's code-simplifier and Osmani's code-simplification, with every deletion rule removed.

You may:

  • Flatten nesting with guard clauses
  • Replace nested ternaries with explicit branches
  • Rename locals in the touched hunks to match neighboring idiom
  • Prefer the crate's existing helper over a fresh one-off
  • Keep comments that explain why; drop only comments you yourself added that restate the next line

You may not:

  • Delete unused-looking code, params, or imports unless the compiler introduced them in this same slice
  • Change tests
  • Expand into files outside the diff
  • Remove error handling, warnings, or failure context
  • Golf the code into a dense one-liner
  • Merge unrelated functions

Ask before every edit: same outputs, same errors, same side effects, same ordering, tests unmodified?

If the "simpler" version is harder to read, revert your own edit.

Return:

## Simplifier Report
- Files touched:
- Expression changes:
- Deletions: none (or compiler-only leftovers from this slice)
- Behavior: unchanged
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. 2mo ago First seen · 53 lines · 42 tokens per session scan A d24dce946cbd

Subscribe to this mod's changes

quality-simplifier is an agent published in the GitHub repository honeycomb-Technologies/Mitsuro (6 stars, last pushed 8d ago), licensed MIT. It adds 42 tokens to every session and 346 once invoked, about $0.0002 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 2026-08-31.

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