---

name: api-documentation-discovery description: Use when APIs fail repeatedly with version-related errors (method not found, wrong arguments, unknown flag) or when about to use library APIs with uncertain knowledge - guides finding current, accurate documentation instead of guessing from training data

API Documentation Discovery

Overview

When your training data conflicts with current API versions, STOP guessing and START discovering. This skill guides you to find current, accurate documentation using language-specific tools.

Core principle: Training data ages. Installed versions are truth. Use discovery tools to find what's actually there.

When to Use

Reactive Triggers (MUST use after these):

• ✅ 2+ failed attempts with same library/API
• ✅ Error patterns: "method not found", "wrong number of arguments", "unknown flag", "undefined method"
• ✅ Version mismatch symptoms in stack traces

Proactive Red Flags (STOP and check docs when you notice):

• ⚠️ You're confident about API usage but haven't verified current version
• ⚠️ User is confident but their syntax keeps failing
• ⚠️ You're making "one more tweak" to syntax
• ⚠️ You're using phrases like "should work", "likely correct", "probably just"
• ⚠️ You're pattern-matching from training data without verification
• ⚠️ You're about to claim something is "documented" without checking

When NOT to use:

• First attempt with clear error message pointing to fix
• Errors unrelated to API usage (logic bugs, type errors in your code)

The Discovery Workflow

Step 1: STOP Guessing

Recognize the trigger. Don't make another attempt based on patterns or user confidence.

Step 2: Identify Context

• What library/framework is failing? (check imports, stack traces, go.mod/Gemfile)
• What version is installed? (language tools show this)
• What operation are you trying? (the actual goal, not the syntax attempt)

Step 3: Use Language Discovery Tools

Check language-specific reference for HOW to discover documentation:

• references/go.md - Go module exploration
• references/ruby.md - Ruby gem exploration

Follow progressive discovery: docs → examples → source

Step 4: Load Framework Reference (if available)

If framework-specific reference exists, load it for curated patterns:

• references/go/cobra.md - Cobra CLI patterns
• references/ruby/rails.md - Rails patterns
• references/ruby/karafka.md - Karafka patterns

Step 5: Verify Before Using

• Found API signature? Verify it matches your use case
• Found example? Adapt it, don't just copy pattern from memory
• Found docs? Read them, don't skim for confirmation

Common Anti-Patterns

Navigation: Language References

Available language discovery guides:

• references/go.md - Go: go doc, go list, example/test scanning
• references/ruby.md - Ruby: bundle info, ri, gem exploration

Path issues: Some languages need tool managers (mise, asdf). If go or bundle not found, try mise exec -- <command>.

Extending this skill: To add a new language reference, see references/WRITING.md for principles and template.

Navigation: Framework References

Available framework cheat sheets:

• references/go/cobra.md - Cobra CLI library patterns
• references/ruby/rails.md - Rails framework patterns (coming)
• references/ruby/karafka.md - Karafka framework patterns (coming)

Red Flags - When You're About to Fail

STOP immediately if you catch yourself:

• Making confident API claims without checking current docs
• Accepting user's confident syntax without verification
• Trying "one more variation" based on pattern-matching
• Using phrases: "should work", "likely", "probably", "common pattern"
• Creating narrative about what "likely happened" without evidence
• Claiming something is "documented" without reading it

All of these mean: Use discovery tools NOW.

After Finding Documentation

1. Verify: API signature matches your use case
2. Adapt: Use the pattern for your specific need
3. Test: Try the verified approach
4. Update understanding: Note what changed from your training data

Real-World Impact

Without this skill:

• 15+ minutes guessing at syntax variations
• Confident claims based on outdated training data
• User frustration from repeated failures

With this skill:

• 2 minutes checking current docs
• Accurate API usage from installed version
• Fast resolution based on truth, not patterns