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.

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.

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.

adr — Skill for Claude Code and Codex by alunduil/alunduil-chezmoi

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.

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.

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 1,185 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.

Model	Per session	Once invoked
Fable 5.1	$0.00091	$0.01185
Opus 5.5	$0.00036	$0.00474
Sonnet 5.5	$0.00018	$0.00237
Haiku 4.5	$0.00009	$0.00119

Measured 21d ago against content hash 8075131a269d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 21d 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 · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ADR

References:

https://www.cognitect.com/blog/2011/11/15/documenting-architecture-decisions — Nygard, original.
https://adr.github.io/madr/ — MADR, structured variant.
https://adr.github.io/ — umbrella, organisational guidance.

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:

If the repo already has ADRs (docs/adr/, doc/adr/, docs/decisions/, docs/explanation/adr/), read one and match shape.
If repo-local CLAUDE.md names a template ("ADRs use MADR"), respect it.
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").
Status — Proposed initially; user promotes to Accepted. Don't pre-mark Accepted. Later values: Accepted ADRs.
Context — forces in play, constraints, what made this a decision.
Decision — We 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 · 115 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.

21d ago Changed · +16 lines 8075131a269d
1mo 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 today), licensed 0BSD. It adds 91 tokens to every session and 1,185 once invoked, about $0.0004 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 2026-08-31.

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M0rtalPhe0nix/dotfiles · 20 tokens

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Bootstrap a workstation with the dotfiles framework. Takes a GitHub user / owner+repo / explicit clone URL and runs dot config init (which shells out to chezmoi) with the right safety prompts. Honors the active agent profile (ask / plan / apply / audit) so it defaults to dry-run in safer modes and full apply in apply.

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Delegate a coding task to a cheap AI model (Mistral Vibe by default, but any provider Vibe knows about — DeepSeek, Gemini Flash, etc.) and supervise the result via git diff. Claude orchestrates, the cheap model codes. Claude consumes 500-1500 tokens per delegation regardless of how many file reads the delegate does…

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adr