adr-writer

adr-writer is a skill for Claude Code, Codex from patricio0312rev/skillset. It costs 47 tokens per session (1,400 once invoked), scanned A, a copy of adr-writer, MIT.

A writing aid for Architecture Decision Records, short documents that explain important technical choices. Each record captures the situation, options considered, trade-offs, consequences, and decision owners.

In plain words
What is it for?
Use it to document choices such as selecting a database, compare alternatives, record who decided, and track whether a decision is proposed, accepted, replaced, or retired.
Why use it?
It prevents important design reasoning from being lost or replaced by informal conversations, helping future developers understand why a choice was made.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to document choices such as selecting a database, compare alternatives, record who decided, and track whether a decision is proposed, accepted, replaced, or retired.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/patricio0312rev/skillset/adr-writer
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 patricio0312rev/skillset --skill adr-writer
Clone the repo
git clone --depth 1 https://github.com/patricio0312rev/skillset

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-writer

README.md
[![agentmods](https://agentmods.dev/badge/skills/patricio0312rev/skillset/adr-writer/github.svg)](https://agentmods.dev/skills/patricio0312rev/skillset/adr-writer)
Your own site
<a href="https://agentmods.dev/skills/patricio0312rev/skillset/adr-writer"><img src="https://agentmods.dev/badge/skills/patricio0312rev/skillset/adr-writer/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-writer

Your own site · 80×15
<a href="https://agentmods.dev/skills/patricio0312rev/skillset/adr-writer"><img src="https://agentmods.dev/badge/skills/patricio0312rev/skillset/adr-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,400 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 100% copy Near-identical to another mod 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 $0.00047 $0.01400
Opus 5 $0.00023 $0.00700
Sonnet 5 $0.00009 $0.00280
Haiku 4.5 $0.00005 $0.00140

Measured 12d ago against content hash 24b8326718fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

adr-writer 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 12d 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.

Origin

This is a copy

100% identical to adr-writer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

templates/architecture/adr-writer/SKILL.md · 251 lines

How it starts

The opening of the file, as written. The whole thing — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ADR Writer

Document architecture decisions with clear context, alternatives, and consequences.

ADR Template

# ADR-001: [Title of Decision]

**Status:** Proposed | Accepted | Deprecated | Superseded by ADR-XXX
**Date:** 2024-01-15
**Deciders:** Alice (Tech Lead), Bob (Principal Engineer)
**Owner:** Alice

## Context

What is the issue we're facing? What factors are driving this decision?

We need to choose a database for our new analytics service. Current
requirements:

- 10M+ events per day
- Complex aggregation queries
- Real-time dashboards
- Budget: $5k/month
- Team familiar with SQL

## Decision

We will use PostgreSQL with TimescaleDB extension.

## Alternatives Considered

### Option 1: PostgreSQL + TimescaleDB (CHOSEN)

**Pros:**

- Team already knows PostgreSQL
- Time-series optimization for analytics
- Reliable and proven
- Good query performance
- Reasonable cost (~$3k/month)

**Cons:**

- Requires manual scaling effort
- Not purpose-built for analytics

### Option 2: ClickHouse

**Pros:**

- Excellent query performance for analytics
- Built for analytics workloads
- Column-oriented storage

**Cons:**

- Team unfamiliar with ClickHouse
- Steeper learning curve
- Different query syntax

### Option 3: BigQuery

**Pros:**

- Fully managed
- Excellent for analytics
- Scales automatically

**Cons:**

- Higher cost (~$8k/month for our volume)
- Vendor lock-in to GCP
- Less control over optimization

## Tradeoffs

**What we're optimizing for:**

- Team velocity (familiar tech)
- Cost efficiency
- Good enough performance

**What we're sacrificing:**

- Peak analytical performance (vs ClickHouse)
- Fully managed experience (vs BigQuery)

## Consequences

### Positive

- Development can start immediately (no learning curve)
- Lower operational costs
- Can reuse existing PostgreSQL expertise
- Easy integration with current stack

### Negative

- Will need to manually optimize queries
- May need to revisit if we scale 10x
- Requires more operational work than BigQuery

### Risks

- Performance may degrade at 100M+ events/day
- **Mitigation:** Monitor query performance, plan migration at 50M events/day

## Implementation Notes

- Use TimescaleDB hypertables for event storage
- Implement continuous aggregates for common queries
- Set up read replicas for dashboard queries
- Document scaling runbook at 50M events/day

## Follow-up Actions

- [ ] Provision PostgreSQL + TimescaleDB cluster (Alice, by 2024-01-20)
- [ ] Create migration script from MySQL (Bob, by 2024-01-22)
- [ ] Set up monitoring dashboards (Alice, by 2024-01-25)
- [ ] Document scaling thresholds (Alice, by 2024-01-30)

## References

- [TimescaleDB Benchmarks](https://example.com)
- [Cost Analysis Spreadsheet](https://docs.google.com/...)
- [Team Survey Results](https://example.com)

## Revision History

- 2024-01-15: Initial draft (Alice)
- 2024-01-16: Added cost analysis (Bob)
- 2024-01-17: Accepted by architecture review board

Read the full file on GitHub · 251 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. 12d ago First seen · 251 lines · 47 tokens per session scan A 24b8326718fd

Subscribe to this mod's changes

adr-writer is a skill published in the GitHub repository patricio0312rev/skillset (6 stars, last pushed 8mo ago), licensed MIT. It adds 47 tokens to every session and 1,400 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to adr-writer, differing in 0 lines, and is treated as a copy.

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