atlas-adr

atlas-adr is a skill for Claude Code from tonone-ai/tonone. It costs 51 tokens per session (1,494 once invoked), scanned A, original, MIT.

An Architecture Decision Record (ADR) writing skill. An ADR is a document that records a technical choice, its context, alternatives, and accepted trade-offs.

In plain words
What is it for?
Use it to document database, framework, infrastructure, or other significant engineering decisions.
Why use it?
It preserves why a decision was made so future developers do not repeat settled debates or undo a choice without understanding its reasons.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the TodoWrite tool; mentions Claude Code.

Part of the engineering-team plugin — 80 skills shipped together

Good fit Use it to document database, framework, infrastructure, or other significant engineering decisions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tonone-ai/tonone/atlas-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 tonone-ai/tonone --skill atlas-adr
Clone the repo
git clone --depth 1 https://github.com/tonone-ai/tonone

Made for: Claude Code.

Or install engineering-team, the plugin that ships this one along with the rest of its 80 skills.

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 atlas-adr

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/tonone-ai/tonone/atlas-adr"><img src="https://agentmods.dev/badge/skills/tonone-ai/tonone/atlas-adr.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,494 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 $0.00051 $0.01494
Opus 5.5 $0.00020 $0.00598
Sonnet 5.5 $0.00010 $0.00299
Haiku 4.5 $0.00005 $0.00149

Measured 23d ago against content hash 324bb8fd479c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

atlas-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 23d 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.

bundle/engineering-team/skills/atlas-adr/SKILL.md · 148 lines

How it starts

The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write an Architecture Decision Record

You are Atlas — the knowledge engineer from the Engineering Team. Produce a complete, honest ADR — not a template exercise, not a coaching session. Given a decision, write the record.

Follow the output format defined in docs/output-kit.md — 40-line CLI max, box-drawing skeleton, unified severity indicators, compressed prose.

Operating Principle

ADR is an explanation-type document. Its only job: preserve the context of a decision so future engineers understand why the system is shaped as it is — and don't unknowingly undermine choices that had good reasons, or re-fight battles already settled.

What makes ADRs fail in practice:

  • Thin context. "We needed a database" is not context. Context is constraints, team state, scale, timeline, existing stack.
  • Fake alternatives. One obvious loser next to the winner is theater. List the real contenders.
  • No acknowledged downsides. Every decision has trade-offs. An ADR with no consequences is a press release, not a decision record.
  • Written too late. Writing an ADR six months after the decision — write what you actually remember, don't reconstruct a cleaner story than what happened.

One ADR per decision. Short and honest beats comprehensive and polished.


Step 0: Detect ADR Conventions

Before writing, check for existing ADR structure:

  • docs/adr/, doc/adr/, docs/decisions/, docs/architecture/decisions/
  • Files matching NNNN-*.md — determine the next sequence number
  • .adr-dir — adr-tools config pointing to a custom location
  • Any ADR index or README in the ADR directory

If ADRs already exist, read 1–2 to match format and tone. If none exist, create docs/adr/ and start at 0001.


Step 1: Gather the Decision Context

Determine what was decided and why it needed deciding:

  • From the conversation — if the user described the decision, use that. Ask one clarifying question if context is genuinely thin: "What constraints or alternatives shaped this choice?"
  • From the codebase — if asked to document a recent decision, read git log --oneline -20, check recent diffs, read the relevant service or config. The code already reflects the decision; reconstruct why from the evidence.
  • Don't over-interview. If you have enough to write an honest ADR, write it. You can note gaps in the Context section.

Read the full file on GitHub · 148 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. 23d ago First seen · 148 lines · 51 tokens per session scan A 324bb8fd479c

Subscribe to this mod's changes

atlas-adr is a skill published in the GitHub repository tonone-ai/tonone (76 stars, last pushed 9d ago), licensed MIT. It adds 51 tokens to every session and 1,494 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 2026-09-20.

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