copilot-dev: Command for Claude Code

.github/prompts/write-adr.prompt.md

write-adr is a command for Claude Code, GitHub Copilot from timothywarner/copilot-dev. It costs 14 tokens per session (1,189 once invoked), scanned A, original, MIT.

A command that writes an Architecture Decision Record, or ADR: a document recording an important technical decision, its context, alternatives, and consequences. It uses the MADR format, a standard ADR template.

In plain words
What is it for?
Use it to document architecture and technology choices, trade-offs, status, and the people involved in the decision.
Why use it?
It preserves why a codebase was designed a certain way so later developers do not have to reconstruct the decision from scratch.

Command for Claude CodeGitHub Copilot

Written for Claude Code and GitHub Copilot: argument-hint in frontmatter, but also a Copilot chat mode or prompt. Also seen: model in frontmatter.

This is timothywarner/copilot-dev's own configuration. It tells Claude Code and GitHub Copilot how to work on copilot-dev 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 copilot-dev configures →

Reuse

Borrowing it

Nothing to install: this file belongs to timothywarner/copilot-dev. 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/timothywarner/copilot-dev/main/.github/prompts/write-adr.prompt.md
Clone the repo
git clone --depth 1 https://github.com/timothywarner/copilot-dev

Made for: Claude Code, GitHub Copilot.

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 write-adr

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

Your own site · 80×15
<a href="https://agentmods.dev/commands/timothywarner/copilot-dev/write-adr"><img src="https://agentmods.dev/badge/commands/timothywarner/copilot-dev/write-adr.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,189 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 $0.00014 $0.01189
Opus 5.5 $0.00006 $0.00476
Sonnet 5.5 $0.00003 $0.00238
Haiku 4.5 $0.00001 $0.00119

Measured 1mo ago against content hash 4fd98f2c615d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

write-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 1mo 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.

.github/prompts/write-adr.prompt.md · 180 lines

How it starts

The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Help me write a complete Architecture Decision Record (ADR) for the following decision:

Decision context: ${input:decisionContext:Describe the architectural decision you need to document}


What is an ADR?

An Architecture Decision Record captures an important architectural or technical decision — what was decided, why, and what the consequences are. ADRs are written once and never deleted (only superseded). They create an immutable audit trail of why the codebase looks the way it does.

Good ADRs are:

  • Written at the time of the decision, not months later
  • Concise (300-800 words is typical)
  • Opinionated — they record the actual decision made, not just options
  • Explicit about trade-offs, not just selling the chosen option

ADR template (MADR format)

I'll produce the ADR in the following format. Fill in any context or constraints you have, and I'll complete the rest:

# ADR-[NUMBER]: [Short descriptive title]

**Status:** Proposed | Accepted | Deprecated | Superseded by ADR-[N]
**Date:** YYYY-MM-DD
**Deciders:** [names or roles of people involved]
**Tags:** [backend, frontend, infrastructure, testing, security, data, etc.]

---

## Context and Problem Statement

[1-3 paragraphs describing:
- The situation that requires a decision
- The forces at play (technical constraints, team size, performance needs, cost)
- Why "doing nothing" is not an option]

## Decision Drivers

- [Driver 1 — e.g., "must run locally without a network connection"]
- [Driver 2 — e.g., "team has existing expertise in X"]
- [Driver 3 — e.g., "must support 10k concurrent users within 6 months"]

## Considered Options

- **Option A: [Name]** — [one-line description]
- **Option B: [Name]** — [one-line description]
- **Option C: [Name]** — [one-line description]

## Decision Outcome

**Chosen option:** "[Option Name]"

**Rationale:** [1-2 sentences explaining why this option best satisfies the decision drivers above]

### Positive Consequences

- [Benefit 1]
- [Benefit 2]
- [Benefit 3]

### Negative Consequences and Trade-offs

- [Trade-off 1 — what we're giving up or accepting]
- [Trade-off 2]
- [Mitigation: how we address this trade-off if applicable]

---

## Options Analysis

### Option A: [Name]

**Description:** [What this option entails]

**Pros:**
- [Pro 1]
- [Pro 2]

**Cons:**
- [Con 1]
- [Con 2]

**Why not chosen:** [Specific reason this was rejected]

---

### Option B: [Name]

**Description:** [What this option entails]

**Pros:**
- [Pro 1]
- [Pro 2]

**Cons:**
- [Con 1]
- [Con 2]

**Why not chosen:** [Specific reason this was rejected]

---

### Option C: [Name] ← CHOSEN

**Description:** [What this option entails]

**Pros:**
- [Pro 1]
- [Pro 2]

**Cons / accepted trade-offs:**
- [Con 1]
- [Con 2]

---

## Implementation Notes

[Optional: specific implementation details, commands, or configuration that capture HOW the decision is realized]

```bash

Read the full file on GitHub · 180 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. 1mo ago First seen · 180 lines · 14 tokens per session scan A 4fd98f2c615d

Subscribe to this mod's changes

write-adr is a command published in the GitHub repository timothywarner/copilot-dev (46 stars, last pushed 1mo ago), licensed MIT. It adds 14 tokens to every session and 1,189 once invoked, about $0.0001 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.