# PR #283 Review: Use property descriptions for completion items

## Summary

This PR fixes a bug where completion items for action.yml were missing descriptions. The root cause was that `mappingValues()` only looked at the type definition's description, ignoring property-level descriptions in the schema.

## Changes Analysis

### Core Fix ([definition.ts](languageservice/src/value-providers/definition.ts))

**Before:**
```typescript
let description: string | undefined;
if (value.type) {
  const typeDef = definitions[value.type];
  description = typeDef?.description;
}
```

**After:**
```typescript
let description: string | undefined = value.description;
if (value.type) {
  const typeDef = definitions[value.type];
  if (!description) {
    description = typeDef?.description;
  }
}
```

✅ **Correct approach** - prioritizes property description, falls back to type description.

### Test Coverage

1. **complete-action.test.ts**: Two new tests verify `author` and `branding` completions include documentation
2. **hover-action.test.ts**: New test for `author` hover + updated `branding` test to verify "Documentation" link

## Potential Issues

### 1. One-of expansion doesn't use property description

Looking at line 140-142:
```typescript
const expanded = expandOneOfToCompletions(oneOfDef, definitions, key, description, indentation, mode);
```

This passes `description` to `expandOneOfToCompletions`, but at this point `description` may have been populated from the property. **This is correct** - the property description is passed through.

### 2. Consistency check

The PR description mentions this is consistent with hover. Verified: [template-reader.ts#L225](workflow-parser/src/templates/template-reader.ts#L225) shows hover uses `nextPropertyDef.description` when available.

## Verdict

✅ **LGTM** - Clean, minimal fix that aligns completion behavior with hover. Good test coverage for the specific cases mentioned.

## Minor Suggestions (non-blocking)

1. Could add a test for a property that has NO description but whose type DOES have one, to verify fallback works (e.g., `inputs` which references `inputs-strict` type that has a description)