update-doc

name	update-doc
description	Update existing documentation by searching codebase for current implementation.

Instructions

When user wants to update documentation:

Step 0: Read Context

Read .devdoc/context.json if it exists:

• Use product.name for product references
• Apply terminology.glossary for correct terms
• Avoid terminology.avoidTerms
• Match documentation.voice for writing style

Step 1: Understand What to Update

Ask the user:

"What would you like to update?

1. A specific page - Tell me which page to update
2. Sync with codebase - I'll find outdated docs by comparing to code
3. Navigation structure - Update docs.json organization
4. Multiple pages - Describe the changes needed
5. Fix issues - Point me to errors or problems"

Step 2: Analyze Current State

Based on their choice:

For Specific Page:

• "Which page? (e.g., guides/authentication.mdx)"
• Read the current page content
• "What changes do you want?
  • Update code examples
  • Add new sections
  • Fix errors/outdated info
  • Rewrite for clarity
  • Other (describe)"

For Codebase Sync (Search Real Files):

Step 2a: Search for source files related to documented topics:

# Find all exported functions/classes
rg "export (function|class|const|interface|type)" --type ts -l

# Find specific topic files
git ls-files | grep -iE "(auth|user|api)"

Step 2b: Read both doc files AND source files:

1. Read the doc file to see what's documented
2. Search and read the corresponding source file
3. Compare documented vs actual implementation

Step 2c: Generate comparison:

DOCUMENTED (from docs/api/users.mdx):
  - createUser(name: string, email: string)

ACTUAL (from src/lib/users.ts):
  - createUser(options: CreateUserInput)

→ SIGNATURE MISMATCH - needs update

Compare documentation against actual source:

• Function signatures changed?
• New exports not documented?
• Removed features still documented?
• Version numbers outdated?

For Navigation:

• Read current docs.json
• "What navigation changes?
  • Add new pages
  • Reorganize groups
  • Rename tabs
  • Remove pages
  • Other"

For Multiple Pages:

• "Which pages need updating?"
• "What's the common change across them?"

For Issues:

• "What's the problem you're seeing?"
• Analyze and propose fixes

Step 3: Detect Feature Flags & Duplicates

Search for feature flags in source:

rg -l "featureFlag|feature_flag|isEnabled|FF_" --type ts
rg "if.*\(.*feature|process\.env\.FEATURE" --type ts

Search for duplicate/similar features:

rg "export.*(login|authenticate|signIn)" --type ts -l

Include in sync report:

Step 4: Generate Sync Report (From File Search)

Compare docs against actual source files:

## Documentation Sync Report

### Signature Changes (from source files)
- `docs/api/users.mdx` vs `src/lib/users.ts`:
  - Documented: `createUser(name, email)`
  - Source file: `createUser(options: CreateUserInput)`
  - Action: Update signature and params
  
### New Exports (in source, not in docs)
- `src/lib/auth.ts`: `refreshToken()` - Not documented
- `src/lib/users.ts`: `deleteUser()` - Not documented

### Removed (in docs, not in source)
- `legacyAuth()` - Not found in any source file

### Up to Date ✓
- `docs/guides/authentication.mdx` matches `src/lib/auth/`

### Unable to Verify (source not found)
⚠️ `docs/legacy/old-api.mdx` - No matching source file

═══════════════════════════════════════════════════════════
                 FEATURE FLAGS DETECTED
═══════════════════════════════════════════════════════════

⚠️ src/lib/auth/index.ts:45 - newAuthFlow
   Current docs: OLD implementation
   Feature flag: NEW implementation available
   
   Question: Update docs to which version?
   1. Keep current (old)
   2. Update to new (feature-flagged)
   3. Document both with toggle notice

═══════════════════════════════════════════════════════════
                 DUPLICATE FEATURES
═══════════════════════════════════════════════════════════

🔄 Similar functions found:
   - src/lib/auth/login.ts → login()
   - src/lib/auth/v2/authenticate.ts → authenticate()
   
   Question: How to handle?
   1. Document primary only
   2. Document all with comparison
   3. Mark duplicates as deprecated

Ask: "How would you like to proceed?

1. Fix all - Update everything (choose defaults for flags/duplicates)
2. Interactive - Review each change with me
3. Specific items - Tell me which to fix
4. Re-search - Search for different file patterns"

Step 5: Review Each Change with User (MANDATORY)

For EACH file being updated, show before/after:

═══════════════════════════════════════════════════════════
              CHANGE REVIEW: docs/api/users.mdx
═══════════════════════════════════════════════════════════

📄 BEFORE (current):
───────────────────────────────────────────────────────────
## createUser(name, email)

Creates a new user account.

| Parameter | Type |
|-----------|------|
| name | string |
| email | string |
───────────────────────────────────────────────────────────

📄 AFTER (proposed):
───────────────────────────────────────────────────────────
## createUser(options)

Creates a new user account.

| Parameter | Type | Description |
|-----------|------|-------------|
| options | CreateUserInput | User creation options |

### CreateUserInput

| Property | Type | Required |
|----------|------|----------|
| name | string | Yes |
| email | string | Yes |
| role | 'admin' \| 'user' | No |
───────────────────────────────────────────────────────────

⚠️ NOTICES:
- Source: src/lib/users.ts:23
- Feature flag: None
- Duplicates: None

OPTIONS:
1. ✅ **Approve** - Apply this change
2. ✏️  **Edit** - Modify the proposed content
3. ⏭️  **Skip** - Don't update this file
4. ❌ **Cancel all** - Stop updating

Choose an option:

Step 6: Apply Updates (After Approval)

Only after user approves each change:

1. Preserve prose - Keep explanations, update technical details
2. Update code examples - Match current signatures
3. Fix terminology - Apply context.json rules
4. Add deprecation notices for removed features:

   <Warning>
   **Deprecated in v2.0**: This feature was removed. 
   See [migration guide](/guides/v2-migration).
   </Warning>
   

5. Add feature flag notices where applicable:

   <Note>
   **Feature Flag**: This feature requires `newAuthFlow` to be enabled.
   </Note>
   

6. Create stubs for new features:

   {/* TODO: Document this new feature */}
   ## New Feature
   Coming soon...
   

Step 6: Update Navigation (if needed)

If pages were added/removed/moved:

1. Read current docs.json
2. Propose navigation changes
3. Apply after user confirms

Step 7: Summary

"Updated:

• docs/api/users.mdx - Updated function signatures
• docs/quickstart.mdx - Updated to v2.0.0
• docs.json - Added webhooks page

Changes ready for review. Run npm run dev to preview.

Want me to commit these changes? Use /commit when ready."

---

Update Patterns

Changed Function Signature

// Before
`createUser(name: string, email: string)`

// After  
`createUser(options: CreateUserInput)`

Where `CreateUserInput`:
```typescript
interface CreateUserInput {
  name: string;
  email: string;
  role?: 'admin' | 'user';
}

### Removed Feature
```mdx
<Warning>
**Removed in v2.0**: The `legacyAuth` method was removed.
Use `authenticate()` instead. See [migration guide](/migrate-v2).
</Warning>

New Feature Stub

---
title: "Webhooks"
description: "Receive real-time notifications"
---

{/* TODO: Complete this documentation */}

## Overview

Documentation coming soon.

## Quick Start

```typescript
// Example placeholder

---

## Key Principles

| Principle | Description |
|-----------|-------------|
| **Search before update** | ALWAYS read source files before changing docs |
| **No hallucination** | Only update based on actual file contents |
| **Review before write** | ALWAYS show before/after for user approval |
| **Flag feature flags** | Detect and highlight conditional features |
| **Flag duplicates** | Identify similar/related features |
| **Verify changes** | Read source to confirm what changed |

## Quality Guidelines

- **SEARCH FIRST** - Read source files before making any update
- **REVIEW WITH USER** - Show before/after for each change
- **DETECT FEATURE FLAGS** - Search for conditional features
- **DETECT DUPLICATES** - Find similar functions/features
- Always show changes before applying
- Preserve existing prose and explanations
- Update only technical details (code, versions, signatures)
- Flag when source file not found - offer auto-correct options
- Add TODO markers for human review
- Apply terminology from context.json
- Create stubs rather than skip new features