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leansdd: Skill for Claude Code

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

leansdd-adr is a skill for Claude Code, Codex from kidpixo/leansdd. It costs 40 tokens per session (481 once invoked), scanned A, original, MIT.

A procedure for recording a technical decision as an ADR, or architecture decision record, in a Lean SDD project. It creates the decision file, adds its index entry, and checks for conflicting decisions.

In plain words
What is it for?
Use it to create, supersede, or reject documented project decisions with a verification step and human-controlled status.
Why use it?
It keeps decisions traceable and prevents a new decision from silently contradicting an existing rule or decision.

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 40 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-adr/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-adr

README.md
[![agentmods](https://agentmods.dev/badge/skills/kidpixo/leansdd/leansdd-adr/github.svg)](https://agentmods.dev/skills/kidpixo/leansdd/leansdd-adr)
Your own site
<a href="https://agentmods.dev/skills/kidpixo/leansdd/leansdd-adr"><img src="https://agentmods.dev/badge/skills/kidpixo/leansdd/leansdd-adr/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-adr

Your own site · 80×15
<a href="https://agentmods.dev/skills/kidpixo/leansdd/leansdd-adr"><img src="https://agentmods.dev/badge/skills/kidpixo/leansdd/leansdd-adr.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 481 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 $0.00040 $0.00481
Opus 5.5 $0.00016 $0.00192
Sonnet 5.5 $0.00008 $0.00096
Haiku 4.5 $0.00004 $0.00048

Measured 5d ago against content hash 66424fe1a01b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

leansdd-adr 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-adr/SKILL.md · 40 lines

What it actually says

Lean SDD ADR (create or supersede)

Creates the ADR file and its index row as one atomic step. Requires .ai/scripts/leansdd-check.py.

Create a new ADR

  1. Get the next free number (never hand-count): python .ai/scripts/leansdd-check.py next-adr
  2. Check for conflicts: grep decisions/index.md Scope column for rows matching the paths this decision touches. Read any matching Active ADR. If this decision contradicts one, it must supersede it (below), not coexist.
  3. If the decision overrides a constraint, quote the exact constraint in the ## Waiver section. Never relax a constraint without one.
  4. Write decisions/ADR-NNN-title.md from the template in AGENTS.md:
    • Status: Proposed (never Active — that is the human's call).
    • Scope: path/glob relative to the .ai/ parent directory, or *.
    • ## Verification: one runnable command or test id with expected result per check, or manual: <steps> naming the artifact a reviewer inspects.
    • Never invent facts; mark guesses (inferred — confirm).
  5. Append the index row: same status, same Scope, one-line summary, today's date.
  6. Bump the decisions/index.md stamp: python .ai/scripts/leansdd-check.py stamp
  7. Run python .ai/scripts/leansdd-check.py and confirm no new ERROR.

Supersede an Active ADR

  1. Set the old ADR's status to Superseded by ADR-NNN in the file and index row.
  2. Create the new ADR as above; reference the old one in ## Context.
  3. If the human has not approved the change, both stay Proposed and you flag it.

Rejected / withdrawn

Set the status in both file and index; leave the file in place. Do not delete ADRs.

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 · 40 lines · 40 tokens per session scan A 66424fe1a01b

Subscribe to this mod's changes

leansdd-adr is a skill published in the GitHub repository kidpixo/leansdd (2 stars, last pushed 6d ago), licensed MIT. It adds 40 tokens to every session and 481 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.

LLMPlanningWriting and docssdd
Related

leansdd-adr compared with skills from other repositories

leansdd-adr next to 6 skills from other repositories
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leansdd-adrkidpixo/leansddSkill26d agoMITA40Claude Code, Codex
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