qc-specialist

qc-specialist is an agent for Claude Code from btspoony/mstar-harness. It costs 28 tokens per session (582 once invoked), scanned A, a copy of qc-specialist-2, MIT.

A code-review role focused on changes, program logic, and whether the architecture will remain maintainable. It is a reviewer, not a person who runs tests.

In plain words
What is it for?
It helps inspect diffs, review logic, assess architecture, and identify maintainability concerns.
Why use it?
It provides a dedicated check for design and maintainability issues that may be missed when reviewing only whether code works.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the morning-star-harness plugin — 23 skills, 5 commands, 14 agents, 2 hooks shipped together

Good fit It helps inspect diffs, review logic, assess architecture, and identify maintainability concerns.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/btspoony/mstar-harness/qc-specialist
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.

Clone the repo
git clone --depth 1 https://github.com/btspoony/mstar-harness

Made for: Claude Code.

Or install morning-star-harness, the plugin that ships this one along with the rest of its 23 skills, 5 commands, 14 agents, 2 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 qc-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/btspoony/mstar-harness/qc-specialist/github.svg)](https://agentmods.dev/agents/btspoony/mstar-harness/qc-specialist)
Your own site
<a href="https://agentmods.dev/agents/btspoony/mstar-harness/qc-specialist"><img src="https://agentmods.dev/badge/agents/btspoony/mstar-harness/qc-specialist/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 qc-specialist

Your own site · 80×15
<a href="https://agentmods.dev/agents/btspoony/mstar-harness/qc-specialist"><img src="https://agentmods.dev/badge/agents/btspoony/mstar-harness/qc-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 582 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 94% copy Near-identical to another mod 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 $0.00028 $0.00582
Opus 5 $0.00014 $0.00291
Sonnet 5 $0.00006 $0.00116
Haiku 4.5 $0.00003 $0.00058

Measured 7d ago against content hash 75224a19fb4d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

qc-specialist 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 7d 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.

Origin

This is a copy

94% identical to qc-specialist-2 — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agents/qc-specialist.md · 61 lines

What it actually says

Morning Star Role Binding

You are qc-specialist. The complete role prompt is provided by the mstar-roles skill.

  • Skill: mstar-roles skill
  • Role reference: references/qc-specialist-shared.md in the mstar-roles skill
  • Role parameters: role_id=qc-specialist, reviewer_index=1, focus=architecture_maintainability, report_suffix=qc1

Mandatory First Steps

This file is a routing shell — NOT your complete role prompt. Before any work, load in order:

  1. skillmstar-harness-core (state machine, gates, routing — global SSOT)
  2. skillmstar-roles (role mapping & parameter table)
  3. Readreferences/qc-specialist-shared.md listed above

System reminders like "ALREADY LOADED" refer to prior sessions — you MUST load these for THIS session.

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. 7d ago Changed · -2 lines · -32 tokens per session 75224a19fb4d
  2. 11d ago First seen · 63 lines · 60 tokens per session scan A 7cd865e9655a

Subscribe to this mod's changes

qc-specialist is an agent published in the GitHub repository btspoony/mstar-harness (58 stars, last pushed today), licensed MIT. It adds 28 tokens to every session and 582 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to qc-specialist-2, differing in 8 lines, and is treated as a copy.