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leansdd: Skill for Claude Code

.agents/skills/leansdd-migrate/SKILL.md

leansdd-migrate is a skill for Claude Code, Codex from kidpixo/leansdd. It costs 42 tokens per session (280 once invoked), scanned A, original, MIT.

A migration workflow for updating a Lean SDD project to a newer specification version. It applies the project's documented migration steps only after a person approves them.

In plain words
What is it for?
Use it to review migration notes, update the recorded specification version, run consistency checks, and summarize remaining manual work.
Why use it?
It prevents specification changes from being applied silently or improvised when project rules have changed.

Skill for Claude CodeCodex

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

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

not rated 2repo 6d ago A scan 42 tokens original MIT
View source ↗ kidpixo/leansdd kidpixo.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to kidpixo/leansdd. 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/kidpixo/leansdd/master/.agents/skills/leansdd-migrate/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/kidpixo/leansdd

Made for: Claude Code, Codex.

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 leansdd-migrate

README.md
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Your own site
<a href="https://agentmods.dev/skills/kidpixo/leansdd/leansdd-migrate"><img src="https://agentmods.dev/badge/skills/kidpixo/leansdd/leansdd-migrate/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 leansdd-migrate

Your own site · 80×15
<a href="https://agentmods.dev/skills/kidpixo/leansdd/leansdd-migrate"><img src="https://agentmods.dev/badge/skills/kidpixo/leansdd/leansdd-migrate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 280 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 $0.00042 $0.00280
Opus 5.5 $0.00017 $0.00112
Sonnet 5.5 $0.00008 $0.00056
Haiku 4.5 $0.00004 $0.00028

Measured 5d ago against content hash a8a7a8e72f2b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

leansdd-migrate 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 5d 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/leansdd-migrate/SKILL.md · 24 lines

What it actually says

Lean SDD migration

Applies a spec-version migration after human approval. Never runs silently: the mismatch must already have been surfaced in an OPEN step.

  1. Read the migration notes for every version between the project's (00_CONSTRAINTS.md → Spec version:) and the target (top of AGENTS.md) in CHANGELOG.md.
  2. Present the concrete steps to the human and get approval.
  3. Apply the steps exactly as written in the CHANGELOG. Do not improvise extra changes while in the neighborhood.
  4. Update Spec version: in 00_CONSTRAINTS.md to the target version.
  5. Stamp everything: python .ai/scripts/leansdd-check.py stamp
  6. Run python .ai/scripts/leansdd-check.py; resolve findings.
  7. Summarize what changed per version; note anything the human must still do by hand.

If this file's AGENTS.md is older than the project's recorded version, do not migrate: flag that AGENTS.md is outdated and change nothing.

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. 5d ago First seen · 24 lines · 42 tokens per session scan A a8a7a8e72f2b

Subscribe to this mod's changes

leansdd-migrate is a skill published in the GitHub repository kidpixo/leansdd (2 stars, last pushed 6d ago), licensed MIT. It adds 42 tokens to every session and 280 once invoked, about $0.0002 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 2026-11-01.

LLMPlanningProject managementsdd
Related

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leansdd-migrate next to 6 skills from other repositories
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