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.
npx agentmods add skills/existential-birds/beagle/adr-writingnpx skills add existential-birds/beagle --skill adr-writinggit clone --depth 1 https://github.com/existential-birds/beagleWrote 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.
[](https://agentmods.dev/skills/existential-birds/beagle/adr-writing)<a href="https://agentmods.dev/skills/existential-birds/beagle/adr-writing"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/adr-writing.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00104 | $0.01733 |
| Opus 5 | $0.00052 | $0.00866 |
| Sonnet 5 | $0.00021 | $0.00347 |
| Haiku 4.5 | $0.00010 | $0.00173 |
Grade A, and why
adr-writing 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ADR Writing
Overview
Generate Architectural Decision Records (ADRs) following the MADR template with systematic completeness checking.
Quick Reference
┌─────────────┐ ┌──────────────┐ ┌─────────────┐
│ SEQUENCE │ ──▶ │ EXPLORE │ ──▶ │ FILL │
│ (get next │ │ (context, │ │ (template │
│ number) │ │ ADRs) │ │ sections) │
└─────────────┘ └──────────────┘ └─────────────┘
│ │
│ ▼
│ ┌─────────────┐
│ │ VERIFY │
│ │ (DoD │
└─────────────────────────────────│ checklist)│
└─────────────┘
When To Use
- Documenting architectural decisions from extracted requirements
- Converting meeting notes or discussions to formal ADRs
- Recording technical choices from PR discussions
- Creating decision records from design documents
Workflow
Gates (objective pass conditions)
Advance to the next step only when the pass condition holds. These replace “I explored” / “I verified” with checkable artifacts.
| After | Pass condition |
|---|---|
| Step 2 | Pass: You have a written list (bullets in draft preamble, scratch notes, or the ADR body) of ≥0 paths under docs/adrs/ you consulted for related/superseded ADRs, or you explicitly record that docs/adrs/ is missing or empty after checking. And you list ≥1 repo path for related code or N/A with one-line reason. |
| Step 5 | Pass: For each E, C, A, D, R in references/definition-of-done.md, the draft either meets that letter’s checklist or contains an [INVESTIGATE: …] marker scoped to that gap. |
| Step 7 | Pass: The ADR file exists at docs/adrs/NNNN-slugified-title.md, and a read of the file shows line 1 is --- and frontmatter parses as YAML. |
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago First seen · 223 lines · 104 tokens per session scan A 693349913dea
adr-writing is a skill published in the GitHub repository existential-birds/beagle (80 stars, last pushed 26d ago), licensed Apache-2.0. It adds 104 tokens to every session and 1,733 once invoked, about $0.0005 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.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
local-ai-agents
Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…
next-partial-prefetching-adoption
Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…
chronicle
Analyze Copilot session history for standup reports, usage tips, session search, and session reindexing. Use when the user asks for a standup, daily summary, usage tips, workflow recommendations, wants to search or find past sessions by keyword/file/PR, wants to reindex their session store, or asks about deleting…