arnesto: Skill for Claude Code

.agents/skills/xp-mikado-method/SKILL.md

xp-mikado-method is a skill for Claude Code, Codex from saski/arnesto. It costs 45 tokens per session (571 once invoked), scanned A, original, Unlicense.

A refactoring method that breaks a large code change into a dependency graph of small, reversible steps. It solves prerequisite changes first.

In plain words
What is it for?
Use it to plan complex refactors, record what breaks, find prerequisite work, and identify safe incremental changes.
Why use it?
It reduces the risk of getting stuck in a large refactor by showing which smaller changes must happen before the final goal.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is saski/arnesto's own configuration. It tells Claude Code and Codex how to work on arnesto 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 arnesto configures →

Reuse

Borrowing it

Nothing to install: this file belongs to saski/arnesto. 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/saski/arnesto/main/.agents/skills/xp-mikado-method/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/saski/arnesto

Made for: Claude Code, Codex.

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README.md
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<a href="https://agentmods.dev/skills/saski/arnesto/xp-mikado-method"><img src="https://agentmods.dev/badge/skills/saski/arnesto/xp-mikado-method.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 571 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 $0.00045 $0.00571
Opus 5 $0.00023 $0.00285
Sonnet 5 $0.00009 $0.00114
Haiku 4.5 $0.00005 $0.00057

Measured 3d ago against content hash 9559fa3bc53f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

xp-mikado-method 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 3d 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.

.agents/skills/xp-mikado-method/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Senior XP Developer — Mikado Method for Safe Refactoring

Act as a Senior XP Developer applying the Mikado Method to achieve a complex change through small, safe, incremental steps.

Context

The Mikado Method helps break down large refactorings into a dependency graph of small changes, each independently committable to trunk.

Core loop:

  1. Try the change → 2. If it breaks, note prerequisites → 3. Revert → 4. Recurse on prerequisites → 5. Solve leaf nodes first

Task

Guide me through the Mikado Method to achieve the stated goal:

  1. Define the Goal

    • What is the desired end state?
    • Why does this change matter?
    • What does "done" look like?
  2. Naive Attempt

    • Try to make the change directly.
    • Observe what breaks (compilation errors, test failures, runtime issues).
    • List each failure as a prerequisite that must be solved first.
  3. Build the Mikado Graph

    • For each prerequisite, recursively apply the method:
      • Try to fix it → note what else breaks → revert → add new prerequisites
    • Continue until you find leaf nodes (changes with no further prerequisites).
  4. Identify Leaf Nodes (Quick Wins)

    • These are safe, independent changes you can make and commit now.
    • Each should be small, tested, and trunk-ready.
  5. Execution Order

    • Start from leaves, work toward the root (your original goal).
    • Each step: implement → test → commit → integrate.
    • The goal becomes achievable once all prerequisites are resolved.

Deliverables

  • Goal statement: Clear description of the target change.
  • Mikado Graph: Visual or textual representation of the dependency tree.
  • Leaf nodes: First actionable changes to implement now.
  • Risks & unknowns: Areas where the graph might grow unexpectedly.
  • Next step: The single smallest change to make right now.

Rules

  • Always revert failed attempts. Never leave the codebase broken.
  • Commit leaf nodes immediately. Don't batch them.
  • Keep the graph updated as you discover new prerequisites.
  • Small steps only. If a node feels too big, break it down further.

Read the full file on GitHub · 57 lines

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. 3d ago First seen · 57 lines · 45 tokens per session scan A 9559fa3bc53f

Subscribe to this mod's changes

xp-mikado-method is a skill published in the GitHub repository saski/arnesto (5 stars, last pushed today), licensed Unlicense. It adds 45 tokens to every session and 571 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 2026-09-03.

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