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.
npx skills add cwinvestments/memstack --skill refactor-plannergit clone --depth 1 https://github.com/cwinvestments/memstackWrote 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.
[](https://agentmods.dev/skills/cwinvestments/memstack/refactor-planner)<a href="https://agentmods.dev/skills/cwinvestments/memstack/refactor-planner"><img src="https://agentmods.dev/badge/skills/cwinvestments/memstack/refactor-planner/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.
<a href="https://agentmods.dev/skills/cwinvestments/memstack/refactor-planner"><img src="https://agentmods.dev/badge/skills/cwinvestments/memstack/refactor-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00081 | $0.03065 |
| Opus 5.5 | $0.00032 | $0.01226 |
| Sonnet 5.5 | $0.00016 | $0.00613 |
| Haiku 4.5 | $0.00008 | $0.00307 |
Grade A, and why
memstack-development-refactor-planner 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.
How it starts
The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Refactor Planner: Planning systematic code improvement...
Identifies code smells, assesses refactoring risk, selects appropriate patterns, and builds incremental execution plans with rollback strategies and verification checkpoints.
Activation
When this skill activates, output:
Refactor Planner: Planning systematic code improvement...
Then execute the protocol below.
Context Guard
| Context | Status |
|---|---|
| User says "refactor", "refactoring plan", "code cleanup" | ACTIVE |
| User says "tech debt", "god class", "tight coupling", "reduce duplication" | ACTIVE |
| User wants to improve existing code structure without changing behavior | ACTIVE |
| User wants to write a new feature | DORMANT: use Feature Spec |
| User wants to change database schema | DORMANT: use Migration Planner |
Common Mistakes
| Mistake | Why It's Wrong |
|---|---|
| "Big bang rewrite" | Rewriting everything at once introduces cascading failures. Incremental changes are safer and shippable. |
| "Refactor without tests" | No test coverage = no safety net. Add characterization tests BEFORE touching code. |
| "Refactor and add features simultaneously" | Mixing behavior changes with structural changes makes bugs impossible to isolate. Separate commits. |
| "No measurable goal" | "Clean up the code" is vague. Define metrics: reduce file from 800 to 200 lines, eliminate 5 duplicate blocks, etc. |
| "Skip the risk assessment" | A function called by 47 files is higher risk than a utility used in 2. Assess blast radius first. |
Protocol
Step 1: Gather Refactoring Context
If the user hasn't provided details, ask:
- Target: what code needs refactoring? (file, module, class, or system)
- Pain point: what's the specific problem? (hard to modify, duplicated, slow, confusing)
- Test coverage: does the target code have tests? (yes, partial, none)
- Constraints: any deadlines, frozen APIs, or deployment concerns?
- Language/framework: what tech stack?
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.
- 1mo ago Changed cf19731dd73b
- 1mo ago First seen · 316 lines · 81 tokens per session scan A 44ee0e7a24a1
memstack-development-refactor-planner is a skill published in the GitHub repository cwinvestments/memstack (425 stars, last pushed 4d ago), licensed MIT. It adds 81 tokens to every session and 3,065 once invoked, about $0.0003 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 2026-08-30.
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