adr

adr is a skill for Claude Code, Codex from alunduil/alunduil-chezmoi. It costs 91 tokens per session (1,039 once invoked), scanned A, original, 0BSD.

Architecture Decision Record guide for recording important technical choices and their reasons. An ADR is a short project document for decisions that shape future work or are difficult to undo.

In plain words
What is it for?
Use it to decide whether an ADR is needed, follow an existing ADR format, or write a decision record using a simple or alternatives-based structure.
Why use it?
It preserves the reasoning behind major choices so later contributors do not have to reconstruct it. It also avoids filling a project with records for small or easily reversible decisions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

Good fit Use it to decide whether an ADR is needed, follow an existing ADR format, or write a decision record using a simple or alternatives-based structure.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/alunduil/alunduil-chezmoi/adr
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.

Any agent
npx skills add alunduil/alunduil-chezmoi --skill adr
Clone the repo
git clone --depth 1 https://github.com/alunduil/alunduil-chezmoi

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 adr

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/alunduil/alunduil-chezmoi/adr"><img src="https://agentmods.dev/badge/skills/alunduil/alunduil-chezmoi/adr.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,039 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 $0.00091 $0.01039
Opus 5 $0.00046 $0.00519
Sonnet 5 $0.00018 $0.00208
Haiku 4.5 $0.00009 $0.00104

Measured 11d ago against content hash e7ff5d334b63, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

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 11d 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.

dot_claude/skills/adr/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ADR

References:

Is one warranted?

  • Yes: architecturally significant and hard to reverse — sets precedent others will follow, locks in a dependency, shapes a public API, picks between non-trivial alternatives.
  • No: tactical implementation choice, easily reversed, personal style, framework-default behaviour. A commit message or PR description carries it better.
  • If not warranted, say so and stop. ADR sprawl makes the collection worth less.

Template

Detect, don't impose:

  1. If the repo already has ADRs (docs/adr/, doc/adr/, docs/decisions/, docs/explanation/adr/), read one and match shape.
  2. If repo-local CLAUDE.md names a template ("ADRs use MADR"), respect it.
  3. Otherwise: Nygard for a single decision; escalate to MADR only when alternatives analysis is genuinely load-bearing (3+ options worth comparing across multiple drivers). Call that case a comparison ADR.

Nygard skeleton

  • Title# N. <imperative phrase> (e.g. "Use PostgreSQL").
  • StatusProposed initially; user promotes to Accepted, Superseded by NNNN, or Deprecated. Don't pre-mark Accepted.
  • Context — forces in play, constraints, what made this a decision.
  • DecisionWe will <do X>. Active voice.
  • Consequences — what becomes easier and harder; positive, negative, neutral.

MADR

Use the upstream template at https://adr.github.io/madr/; don't re-derive it here. Sections that earn their weight: Decision Drivers, Considered Options (with pros/cons), Decision Outcome.

Decompose and verify

Comparison ADRs only; a single-decision Nygard record skips it.

A comparison ADR that starts from an inherited conclusion reverse-justifies it with abstract drivers ("cross-surface leverage", "maintenance burden") and never examines the facts that decide it. Run this interview with the user before any Context, driver, or outcome prose exists:

Read the full file on GitHub · 99 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. 11d ago First seen · 99 lines · 91 tokens per session scan A e7ff5d334b63

Subscribe to this mod's changes

adr is a skill published in the GitHub repository alunduil/alunduil-chezmoi (2 stars, last pushed yesterday), licensed 0BSD. It adds 91 tokens to every session and 1,039 once invoked, about $0.0005 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 2026-08-31.

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