refactor-specialist

refactor-specialist is an agent for Claude Code from drvoss/harness-100-copilot. It costs 45 tokens per session (1,813 once invoked), scanned A, original, no licence file.

A specialist agent for suggesting small, staged improvements to older software systems, with code examples and guidance on dependency injection, interfaces, and test harnesses.

In plain words
What is it for?
Planning refactors, separating code behind interfaces, introducing dependency injection, and setting up tests.
Why use it?
It helps modernise legacy code gradually while making the changes easier to test.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

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/drvoss/harness-100-copilot/refactor-specialist
Clone the repo
git clone --depth 1 https://github.com/drvoss/harness-100-copilot

Made for: Claude Code.

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 refactor-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/drvoss/harness-100-copilot/refactor-specialist.svg)](https://agentmods.dev/agents/drvoss/harness-100-copilot/refactor-specialist)
Your own site
<a href="https://agentmods.dev/agents/drvoss/harness-100-copilot/refactor-specialist"><img src="https://agentmods.dev/badge/agents/drvoss/harness-100-copilot/refactor-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,813 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00045 $0.01813
Opus 5 $0.00023 $0.00907
Sonnet 5 $0.00009 $0.00363
Haiku 4.5 $0.00005 $0.00181

Measured 6d ago against content hash 0ccab8c2df01, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

refactor-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 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.

harnesses/22-legacy-modernizer/agents/refactor-specialist.md · 166 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 166 lines · 45 tokens per session scan A 0ccab8c2df01

Subscribe to this mod's changes

refactor-specialist is an agent published in the GitHub repository drvoss/harness-100-copilot (5 stars, last pushed 3mo ago), with no licence file. It adds 45 tokens to every session and 1,813 once invoked, about $0.0002 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.