Write Tests

What it does

When your agent uses it

• Changing .test.ts/.test.tsx files
• Package test scripts
• Package metadata for test-only dependencies

Example prompts

• “/write-tests”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1Read the nearest package.json, tsconfig.json, and existing sibling tests before choosing a runner or fixture style.
2. 2Identify whether the package can depend on @remix-run/test, or whether it is a dependency of @remix-run/test and must avoid a circular…
3. 3Keep the test close to the behavior owner. Prefer local helpers and direct Web/Node primitives over importing higher-level workspace…
4. 4Put test-only workspace packages in devDependencies with workspace:^; do not add them to runtime dependencies.
5. 5Run the package test and typecheck commands. Refresh pnpm-lock.yaml when package metadata changes.

What it can do on your machine

Read from SKILL.md and the folder at commit ef2c594. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • pnpm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Write Tests loads about 1.3k tokens when it runs. Until then it costs about 62 tokens; SKILL.md has 565 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~62

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from remix-run/remix at commit ef2c594, republished under its MIT licence (© remix-run). 565 words, ~1,262 tokens.

name

write-tests

description

Write, refactor, or review tests in the Remix repository. Use when adding or changing `.test.ts`/`.test.tsx` files, package test scripts, test fixtures, mocks, coverage tests, e2e tests, or package metadata for test-only dependencies.

"test": "node --disable-warning=ExperimentalWarning --test './src/**/*.test.ts'"

import * as assert from 'node:assert/strict'
import { describe, it } from 'node:test'

"test": "remix test"

import * as assert from '@remix-run/assert'
import { describe, it } from '@remix-run/test'

pnpm --filter @remix-run/<package> run test
pnpm --filter @remix-run/<package> run typecheck
pnpm i --frozen-lockfile --ignore-scripts

pnpm run test:changed
pnpm run typecheck:changed
pnpm run lint

© remix-run, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/write-tests of remix-run/remix.

• SKILL.md
• agents/openai.yaml

Open the folder on GitHubat commit ef2c594