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/codebygarv/ai-skills/adr-writernpx skills add codebygarv/Ai-skills --skill adr-writergit clone --depth 1 https://github.com/codebygarv/Ai-skillsWrote 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/codebygarv/ai-skills/adr-writer)<a href="https://agentmods.dev/skills/codebygarv/ai-skills/adr-writer"><img src="https://agentmods.dev/badge/skills/codebygarv/ai-skills/adr-writer.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 | $0.00042 | $0.00580 |
| Opus 5 | $0.00021 | $0.00290 |
| Sonnet 5 | $0.00008 | $0.00116 |
| Haiku 4.5 | $0.00004 | $0.00058 |
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 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 — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purpose
Document an architectural decision in ADR format — capturing not just what was decided, but the context that forced the decision, the alternatives considered, and the consequences accepted. The value is for the reader six months later asking "why on earth is it built this way."
When to Use
- A significant technical decision has been made and needs to be recorded.
- Onboarding docs keep having to explain the same "why is it like this" question verbally.
- Retroactively documenting an existing decision whose rationale lives only in people's heads.
Pairs with Decision Maker: that skill makes the decision by comparing options; this skill records a decision in a durable, standard format.
What to Analyze / Do
- Capture the forces, not just the choice — what constraints, requirements, or pressures made this decision necessary. A decision with no stated context reads as arbitrary later.
- Record the alternatives that were genuinely considered — and why each was rejected. This is the part future readers need most, because it prevents re-litigating options that were already dismissed for good reason.
- State consequences honestly, including the negative ones — every real decision has downsides. An ADR that lists only benefits is marketing, not a record.
- Assign a status — Proposed / Accepted / Deprecated / Superseded (with a link to the superseding ADR when applicable). ADRs are immutable once accepted; superseding is how they change.
- Keep it short — an ADR is typically one page. If it's sprawling, the decision may actually be several decisions that each deserve their own record.
Output Format
Standard ADR structure:
- Title —
ADR-NNN: <short decision statement> - Status — Proposed / Accepted / Deprecated / Superseded by ADR-NNN
- Date
- Context — the forces and constraints that made a decision necessary.
- Decision — what was chosen, stated in active voice ("We will…").
- Alternatives Considered — each with why it was rejected.
- Consequences — both positive and negative, stated plainly.
What ships with it
2 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 · 42 lines · 42 tokens per session scan A 9d2fd6619d26
adr-writer is a skill published in the GitHub repository codebygarv/Ai-skills (25 stars, last pushed 16d ago), licensed MIT. It adds 42 tokens to every session and 580 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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