Source driven

Skill helderberto/agent-skills/skills/source-driven

Implement features using official docs for exact dependency versions instead of training data. Use when user asks to "check the docs", "use official docs", "source-driven", or when implementing with unfamiliar APIs/libraries. Don't use for well-known stdlib APIs or project-internal code.From its SKILL.md

Install

npx -y skills add helderberto/agent-skills --skill source-driven

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

12 stars12 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

1.7 KB, 337 tokens by cl100k_base, as published. Nobody here has run it

Source-Driven Development

Never rely on training data for API usage. Read the actual source of truth.

Workflow

1. Identify Dependencies

Read package.json (or equivalent manifest) for exact versions
Note the exact version of each library involved in the task

2. Fetch Official Docs

For each dependency involved:

Find the correct docs URL for that specific version (not "latest")
Fetch the relevant API page using WebFetch
Extract: function signatures, required params, return types, breaking changes

If docs are unavailable or ambiguous, read the library source in node_modules/.

3. Implement from Docs

Use only APIs confirmed in fetched docs
Match function signatures exactly (param order, types, defaults)
If a doc page confirms the API: proceed
If you cannot verify an API: mark it // UNVERIFIED: could not confirm in docs for v{version}

4. Cite Sources

Add a brief comment on non-obvious API usage:

// Ref: https://docs.example.com/v3/api#method

Only cite when the usage is surprising or version-specific. Don't over-comment obvious calls.

Error Handling

Docs URL returns 404 → try GitHub repo README, then node_modules/ source
Version not found in docs → use closest version docs + mark // UNVERIFIED: docs for v{closest}, installed v{actual}
WebFetch blocked/unavailable → read node_modules/{pkg}/README.md or type definitions

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.