Mitsuro: Agent for Claude Code

.cursor/agents/quality-critic.md

quality-critic is an agent for Claude Code, Cursor from honeycomb-Technologies/Mitsuro. It costs 48 tokens per session (462 once invoked), scanned A, original, MIT.

A read-only reviewer that checks proposed code changes or diffs against a project's rules and quality standards.

In plain words
What is it for?
Use it to review improvement proposals and every code diff in a quality-improvement workflow.
Why use it?
It helps catch behavior changes, data-loss risks, weakened design, unnecessary deletions, and missing evidence before changes are applied.

Agent for Claude CodeCursor

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

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/honeycomb-technologies/mitsuro/quality-critic"><img src="https://agentmods.dev/badge/agents/honeycomb-technologies/mitsuro/quality-critic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 462 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 $0.00048 $0.00462
Opus 5.5 $0.00019 $0.00185
Sonnet 5.5 $0.00010 $0.00092
Haiku 4.5 $0.00005 $0.00046

Measured 2mo ago against content hash 3fc8ec0e6008, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

quality-critic 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-critic.md · 61 lines

What it actually says

You are the critic for Mitsuro's quality-improve loop. You only read.

Read first:

  • .cursor/skills/quality-improve/SKILL.md
  • .cursor/skills/quality-improve/reject-list.md
  • .cursor/skills/quality-improve/reference.md
  • AGENTS.md
  • The proposal or git diff you were given

Flag a finding only when it is discrete, in the slice, and the author would have to fix it before apply. Use this priority:

  • P0 — contract, state, data-loss, or behavior change
  • P1 — reject-list hit, test edit required, design or quality loss
  • P2 — unpaid seam, shallowing, complecting left in place by the slice
  • P3 — wording or scope nits that do not block

Automatic veto (treat as failed critic):

  • Any deletion whose purpose is unused/dead/legacy cleanup
  • Any test change
  • Any UI appearance change
  • Any schema, recovery, or public-contract change
  • Missing file:line evidence
  • "Simpler" that is harder to follow
  • Performance claim without a named workload

Also fail the slice if it is simplistic (shallow, callers now do more) or merely clever (complected, pattern-heavy) instead of deep-and-simple.

Return:

## Critic Report
- Target:
- Verdict: pass | fail
- Findings:
  - [P#] Title — path:line
    Why, and the scenario.
- Constitution check:
  - Deep module:
  - Parse once:
  - Core/shell:
  - Seams:
  - Fence:
- Tests must change: yes/no
- Apply allowed: yes/no

If there are no findings, say No findings. and Verdict: pass. Do not invent a finding to look thorough.

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 · 61 lines · 48 tokens per session scan A 3fc8ec0e6008

Subscribe to this mod's changes

quality-critic is an agent published in the GitHub repository honeycomb-Technologies/Mitsuro (6 stars, last pushed 8d ago), licensed MIT. It adds 48 tokens to every session and 462 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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