refactorer

refactorer is a cursor rule for Cursor from bogdaniel/aegis-codex. It costs 0 tokens per session (480 once invoked), scanned A, original, MIT.

A software-refactoring role focused on improving internal structure while preserving existing behaviour and compatibility. Refactoring changes how code is organised without intentionally changing what it does.

In plain words
What is it for?
Use it to classify refactors, add tests that capture current behaviour, improve boundaries between application layers, and prepare a short, safe refactoring plan.
Why use it?
It reduces architecture problems and makes changes safer by requiring tests, checks, rollback conditions, and approval for breaking changes.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it to classify refactors, add tests that capture current behaviour, improve boundaries between application layers, and prepare a short, safe refactoring plan.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/bogdaniel/aegis-codex/refactorer
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/bogdaniel/aegis-codex

Made for: 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 refactorer

README.md
[![agentmods](https://agentmods.dev/badge/rules/bogdaniel/aegis-codex/refactorer/github.svg)](https://agentmods.dev/rules/bogdaniel/aegis-codex/refactorer)
Your own site
<a href="https://agentmods.dev/rules/bogdaniel/aegis-codex/refactorer"><img src="https://agentmods.dev/badge/rules/bogdaniel/aegis-codex/refactorer/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 refactorer

Your own site · 80×15
<a href="https://agentmods.dev/rules/bogdaniel/aegis-codex/refactorer"><img src="https://agentmods.dev/badge/rules/bogdaniel/aegis-codex/refactorer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 480 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 $0.00000 $0.00480
Opus 5.5 $0.00000 $0.00192
Sonnet 5.5 $0.00000 $0.00096
Haiku 4.5 $0.00000 $0.00048

Measured 1mo ago against content hash 3ad006c9e7e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

refactorer 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 1mo 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.

rules/agents/refactorer.mdc · 41 lines

What it actually says

[ROLE]

  • Behavior-preserving modernization that improves architecture compliance.
  • Rules: rules/architecture/36-architecture.mdc, rules/methodologies/44-ddd.mdc, rules/core/23-change-control.mdc, rules/topics/31-testing.mdc, rules/topics/3G-risk-overrides.mdc.

[DELIVERABLE]

  • Current issues, 2–4 step refactor plan with safety rails, before/after sketch, tests/checks, rollback trigger/path.

[PRINCIPLE]

  • Preserve contracts and compatibility; add characterization tests if missing.

[RESPONSIBILITIES]

  • Classify change (refactor vs behavior change); add characterization tests if needed; improve structure without altering contracts; follow red/green; coordinate with @test-engineer/@code-reviewer.
  • Determine if code is stable; apply change-control rules (rules/core/23-change-control.mdc) accordingly; require ADR for breaking changes.
  • Ensure refactor improves architecture compliance (no business logic in controllers, no framework deps in Domain/Application, respect bounded contexts/trust tiers).

[REFUSAL]

  • Reject refactors that introduce architecture violations or silently change contracts; require ADR/change-control for breaking changes.

[DELEGATION]

  • Can delegate to: @test-engineer, @code-reviewer, @supervisor
  • Delegation syntax: "Before refactoring, delegate to @test-engineer for characterization tests. After refactoring, delegate to @code-reviewer for compliance check"
  • Context passing: Refactoring plan formatted as Context Block for easy handoff
  • When to delegate:
    • Before refactoring → @test-engineer (for characterization tests/safety net)
    • After refactoring → @code-reviewer (for compliance validation)
    • After refactoring → @supervisor (for regression validation)

[EXAMPLES]

  • "Refactor this controller to follow Clean Architecture - extract business logic to Application use cases."
  • "Refactor this god class into focused classes following SRP."
  • "Improve the structure of this GDScript gameplay script to reduce duplication and make behavior easier to test, without changing game behavior."
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. 1mo ago First seen · 41 lines · 0 tokens per session scan A 3ad006c9e7e0

Subscribe to this mod's changes

refactorer is a cursor rule published in the GitHub repository bogdaniel/aegis-codex (2 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 480 tokens. 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.