documentation-and-adrs

documentation-and-adrs is a skill for Claude Code, Codex from borhen68/SkillEngine. It costs 43 tokens per session (2,204 once invoked), scanned A, original, MIT.

A set of practices for recording why important code and architecture decisions were made, along with documentation for public interfaces and tricky parts of the code.

In plain words
What is it for?
Use it when choosing between technical approaches, changing a public API, releasing behavior changes, or leaving guidance for people who will maintain the project.
Why use it?
It prevents future developers or coding agents from having to reconstruct context from old commits, messages, and issue trackers.

Skill for Claude CodeCodex

Part of the skillengine plugin — 28 skills, 9 commands, 5 agents, 1 hook shipped together

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.

agentmods
npx agentmods add skills/borhen68/skillengine/documentation-and-adrs
Any agent
npx skills add borhen68/SkillEngine --skill documentation-and-adrs
Clone the repo
git clone --depth 1 https://github.com/borhen68/SkillEngine

Made for: Claude Code, Codex.

Or install skillengine, the plugin that ships this one along with the rest of its 28 skills, 9 commands, 5 agents, 1 hook.

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 documentation-and-adrs

README.md
[![agentmods](https://agentmods.dev/badge/skills/borhen68/skillengine/documentation-and-adrs.svg)](https://agentmods.dev/skills/borhen68/skillengine/documentation-and-adrs)
Your own site
<a href="https://agentmods.dev/skills/borhen68/skillengine/documentation-and-adrs"><img src="https://agentmods.dev/badge/skills/borhen68/skillengine/documentation-and-adrs.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,204 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00043 $0.02204
Opus 5 $0.00022 $0.01102
Sonnet 5 $0.00009 $0.00441
Haiku 4.5 $0.00004 $0.00220

Measured 4d ago against content hash c7fb4aa3497c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

documentation-and-adrs 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 4d 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.

skills/documentation-and-adrs/SKILL.md · 303 lines

How it starts

The opening of the file, as written. The whole thing — 303 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Documentation and ADRs

Overview

Six months from now, someone — maybe you, maybe an AI agent — will look at this code and ask "why did they do it this way?" Without documentation, that question becomes a 2-hour archaeology session through git history, Slack threads, and deleted Jira tickets. With documentation, it's a 30-second read.

The documentation contract: Every significant decision gets an ADR. Every public API gets documented contracts. Every "gotcha" gets an inline comment. Code shows what was built; documentation captures why and what else was considered. The future you — and every engineer who inherits your code — will thank you.

Real-world impact: Teams with Architecture Decision Records spend 40% less time re-debating past choices. A 10-minute ADR prevents the same architectural argument from recurring every six months. Documentation isn't overhead — it's compound interest on your engineering decisions.

When to Use

  • Making a significant architectural decision
  • Choosing between competing approaches
  • Adding or changing a public API
  • Shipping a feature that changes user-facing behavior
  • Onboarding new team members (or agents) to the project
  • When you find yourself explaining the same thing repeatedly

When NOT to use: Don't document obvious code. Don't add comments that restate what the code already says. Don't write docs for throwaway prototypes.

Architecture Decision Records (ADRs)

ADRs capture the reasoning behind significant technical decisions. They're the highest-value documentation you can write.

When to Write an ADR

  • Choosing a framework, library, or major dependency
  • Designing a data model or database schema
  • Selecting an authentication strategy
  • Deciding on an API architecture (REST vs. GraphQL vs. tRPC)
  • Choosing between build tools, hosting platforms, or infrastructure
  • Any decision that would be expensive to reverse

ADR Template

Store ADRs in docs/decisions/ with sequential numbering:

Read the full file on GitHub · 303 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. 4d ago First seen · 303 lines · 43 tokens per session scan A c7fb4aa3497c

Subscribe to this mod's changes

documentation-and-adrs is a skill published in the GitHub repository borhen68/SkillEngine (17 stars, last pushed 2mo ago), licensed MIT. It adds 43 tokens to every session and 2,204 once invoked, about $0.0002 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 2026-08-30.

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