Output Dev Code Style

What it does

When your agent uses it

• Reviewing any TypeScript/JavaScript code
• Tasks that involve Linting and formatting

Example prompts

• “/output-dev-code-style”

Requirements

• Node.js
• Pre-approved tools (allowed-tools): Read, Bash, Glob, Grep

Workflow steps

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

1. 1Check for a linter config. Look for eslint.config.js, .eslintrc.*, biome.json, deno.json, or similar in the project root.
2. 2Check for a formatter config. Look for .prettierrc*, .editorconfig, or formatter settings in package.json.
3. 3Check for lint/format scripts. Look in package.json for lint, lint:fix, format, or similar scripts.
4. 4Read existing source files. If no config exists, infer conventions from the existing code (comma style, quote style, indentation…

What it can do on your machine

Read from SKILL.md and the folder at commit 52b51ac. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Bash
  • Glob
  • Grep

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npm
  • npx

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

• Network

  No URLs in SKILL.md. Its commands use npm and npx, 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

Output Dev Code Style loads about 1.5k tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 529 words of instructions outside code blocks.

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

~64

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

~1.5k

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

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Bash, Glob, Grep

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 growthxai/output at commit 52b51ac, republished under its Apache-2.0 licence (© growthxai). 529 words, ~1,548 tokens.

name

output-dev-code-style

description

Code style conventions for Output SDK workflow projects. Use when writing or reviewing any TypeScript/JavaScript code. Discovers the project's own linting rules first; falls back to Output SDK conventions when no linter is configured.

allowed-tools

Read, Bash, Glob, Grep

// CORRECT
const config = {
  name: 'workflow',
  timeout: 30000
};

const items = [ 'a', 'b', 'c' ];

export const myStep = step( {
  name: 'myStep',
  inputSchema: MyInputSchema,
  outputSchema: MyOutputSchema,
  fn: async input => {
    return { result: input.value };
  }
} );

// WRONG - trailing commas
const config = {
  name: 'workflow',
  timeout: 30000,  // <-- not allowed
}

const items = [ 'a', 'b', 'c', ]  // <-- not allowed

// CORRECT - ternary
const label = count > 1 ? 'items' : 'item';

// CORRECT - named helper for complex cases
const fetchWithFallback = async url => {
  try {
    return await fetchContent( url );
  } catch {
    return '[Content unavailable]';
  }
};
const content = await fetchWithFallback( url );

// CORRECT - early return in a function
function resolve( input ) {
  if ( input.mode === 'fast' ) {
    return fastPath( input );
  }
  return standardPath( input );
}

// WRONG
let content;  // <-- banned
try {
  content = await fetchContent( url );
} catch {
  content = '[Content unavailable]';
}

let label;  // <-- banned
if ( count > 1 ) {
  label = 'items';
} else {
  label = 'item';
}

// CORRECT
items.map( item => item.id )
items.filter( s => s.url )
items.forEach( x => console.log( x ) )
fn: async input => { ... }

// Parens required for these cases:
items.reduce( ( acc, item ) => acc + item, 0 )
const run = ( { name, id } ) => `${name}-${id}`;
const noop = () => {};
fn: async ( input ): Promise<WorkflowOutput> => { ... }  // return type annotation

// WRONG - unnecessary parens on single param
items.map( ( item ) => item.id )
items.filter( ( s ) => s.url )
fn: async ( input ) => { ... }

// CORRECT
const result = longExpression +
  anotherExpression;

const isValid = conditionA &&
  conditionB &&
  conditionC;

const value = condition ?
  trueResult :
  falseResult;

// WRONG - operator on next line
const result = longExpression
  + anotherExpression;

© growthxai, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in coding_assistants/claude/plugins/outputai/skills/output-dev-code-style of growthxai/output.

Open the folder on GitHubat commit 52b51ac