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shipwright: Skill for Claude Code

.claude/skills/add-adapter/SKILL.md

add-adapter is a skill for Claude Code from sethdford/shipwright. It costs 34 tokens per session (190 once invoked), scanned A, original, MIT.

A guide for adding an adapter that connects the application to an outside system such as a command-line tool, API, or file format. It covers the interface, tests, safe process execution, output validation, and error results.

In plain words
What is it for?
Use it when adding a new external-system connection with TypeScript tests and a process runner.
Why use it?
It keeps outside-system access behind a defined boundary and prevents unsafe shell commands from being built from untrusted data.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is sethdford/shipwright's own configuration. It tells Claude Code how to work on shipwright 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 shipwright configures →

not rated 21repo today A scan 34 tokens original MIT
View source ↗ sethdford/shipwright sethdford.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to sethdford/shipwright. 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/sethdford/shipwright/main/.claude/skills/add-adapter/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/sethdford/shipwright

Made for: Claude Code.

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 add-adapter

README.md
[![agentmods](https://agentmods.dev/badge/skills/sethdford/shipwright/add-adapter/github.svg)](https://agentmods.dev/skills/sethdford/shipwright/add-adapter)
Your own site
<a href="https://agentmods.dev/skills/sethdford/shipwright/add-adapter"><img src="https://agentmods.dev/badge/skills/sethdford/shipwright/add-adapter/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 add-adapter

Your own site · 80×15
<a href="https://agentmods.dev/skills/sethdford/shipwright/add-adapter"><img src="https://agentmods.dev/badge/skills/sethdford/shipwright/add-adapter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 190 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 $0.00034 $0.00190
Opus 5.5 $0.00014 $0.00076
Sonnet 5.5 $0.00007 $0.00038
Haiku 4.5 $0.00003 $0.00019

Measured 14d ago against content hash 9808275acd37, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

add-adapter 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 14d 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.

.claude/skills/add-adapter/SKILL.md · 12 lines

What it actually says

  1. Define or extend the port interface where it is consumed (a context's ports.ts, or src/shared/kernel/ports.ts if several contexts need it). Types only.
  2. Write tests in src/adapters/<system>/<name>.test.ts with FakeProcessRunner / createTestEnv().
  3. Implement with ProcessRunner (argv, timeout) and validate output with zod. Return Result. Never build a shell command string from request, issue, PR or model data.
  4. Construct it in src/main.ts and pass it to the use case.
  5. bun run check — F5 fails if I/O leaked outside src/adapters.
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. 14d ago First seen · 12 lines · 34 tokens per session scan A 9808275acd37

Subscribe to this mod's changes

add-adapter is a skill published in the GitHub repository sethdford/shipwright (21 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 190 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 2026-10-15.

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