# Documentation Audit Report

**Branch**: refactor/bootstrap-extraction
**Base**: main
**Date**: 2025-12-15 21:53:00
**Commit**: 8c46ba4 refactor: extract handler setup from bootstrap into dedicated module

---

## Executive Summary

This PR extracts handler setup logic from `bootstrap.ts` into a dedicated `handler-setup.ts` module. The change reduces bootstrap complexity and prepares for v0.4.0 (Task Resumption, Scheduling) by centralizing handler creation.

**Documentation Score**: 8/10

**Merge Recommendation**: APPROVED WITH CONDITIONS

---

## Files Changed

| File | Change Type | Lines Added | Lines Removed |
|------|-------------|-------------|---------------|
| `/workspace/delegate/src/services/handler-setup.ts` | NEW | 242 | 0 |
| `/workspace/delegate/src/bootstrap.ts` | MODIFIED | 12 | 155 |
| `/workspace/delegate/tests/unit/services/handler-setup.test.ts` | NEW | 218 | 0 |

---

## Category 1: Issues in Your Changes (BLOCKING)

### CRITICAL: None

### HIGH: None

### MEDIUM

#### M1. Missing JSDoc @throws documentation
**File**: `/workspace/delegate/src/services/handler-setup.ts`
**Lines**: 82-128 (`extractHandlerDependencies`), 140-242 (`setupEventHandlers`)

**Issue**: Both exported functions have good JSDoc summaries but lack `@throws` documentation. Per project conventions (see `docs/ROADMAP.md` v0.3.1 quality improvements), public APIs should have complete JSDoc coverage including error scenarios.

**Current**:
```typescript
/**
 * Extract all dependencies needed for handler setup from Container
 * Returns Result with clear error for any missing service
 *
 * @param container - The DI container with registered services
 * @returns Result containing all handler dependencies or error
 */
export function extractHandlerDependencies(
```

**Recommended**:
```typescript
/**
 * Extract all dependencies needed for handler setup from Container
 * Returns Result with clear error for any missing service
 *
 * @param container - The DI container with registered services
 * @returns Result containing all handler dependencies or error
 * @example
 * ```typescript
 * const depsResult = extractHandlerDependencies(container);
 * if (!depsResult.ok) return depsResult;
 * const deps = depsResult.value;
 * ```
 */
```

---

#### M2. Missing module-level documentation explaining WHY extraction was done
**File**: `/workspace/delegate/src/services/handler-setup.ts`
**Lines**: 1-5

**Issue**: The module comment explains WHAT but is sparse on WHY. The architecture rationale is scattered in inline comments. A more comprehensive module docblock would help future developers understand the design decision.

**Current**:
```typescript
/**
 * Handler setup module for bootstrap
 * ARCHITECTURE: Centralizes event handler creation and registration
 * Rationale: Reduces bootstrap.ts complexity, enables easy handler additions for v0.4.0
 */
```

**Recommended**: Add migration context and link to roadmap:
```typescript
/**
 * Handler setup module for bootstrap
 * 
 * ARCHITECTURE: Centralizes event handler creation and registration
 * 
 * Rationale:
 * 1. Reduces bootstrap.ts complexity (from ~375 lines to ~215 lines for handler setup)
 * 2. Enables easy addition of new handlers for v0.4.0 (Task Resumption, Scheduling)
 * 3. Makes handler setup independently testable
 * 4. Follows single-responsibility principle - bootstrap.ts wires DI, this module wires handlers
 * 
 * Handler Patterns:
 * - 6 standard handlers use setup(eventBus) pattern via EventHandlerRegistry
 * - DependencyHandler uses factory pattern (create()) for async graph initialization
 * 
 * @see docs/architecture/EVENT_FLOW.md for handler event subscriptions
 * @see docs/ROADMAP.md v0.4.0 for planned handler additions
 */
```

---

#### M3. Test file missing module-level documentation of test strategy
**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Lines**: 1-5

**Issue**: Test file has brief description but lacks explanation of test strategy (what scenarios are covered, what's intentionally not covered).

**Current**:
```typescript
/**
 * Unit tests for handler-setup module
 * Tests dependency extraction and handler setup functionality
 */
```

**Recommended**:
```typescript
/**
 * Unit tests for handler-setup module
 * 
 * Test Strategy:
 * - extractHandlerDependencies: Tests fail-fast behavior for missing dependencies
 * - setupEventHandlers: Tests successful setup and registry lifecycle
 * 
 * Coverage Notes:
 * - Uses real implementations (Database, SQLiteTaskRepository) for integration-level confidence
 * - Uses TestProcessSpawner to avoid real process spawning
 * - Does NOT test individual handler behavior (covered in respective handler tests)
 * - Does NOT test DependencyHandler failure paths (factory pattern handles internally)
 */
```

---

## Category 2: Issues in Code You Touched (Should Fix)

### HIGH

#### H1. CLAUDE.md File Locations table is now outdated
**File**: `/workspace/delegate/CLAUDE.md`
**Lines**: 155-169

**Issue**: The "File Locations" table references `src/services/handlers/` for event handlers but does not mention the new `src/services/handler-setup.ts` file which is now central to handler setup.

**Current Table**:
```markdown
| Event handlers | `src/services/handlers/` |
```

**Recommended Addition**:
```markdown
| Event handlers | `src/services/handlers/` |
| Handler setup | `src/services/handler-setup.ts` |
```

---

#### H2. EVENT_FLOW.md does not mention handler setup centralization
**File**: `/workspace/delegate/docs/architecture/EVENT_FLOW.md`
**Lines**: 358-383 (Event Handler Registration section)

**Issue**: The EVENT_FLOW.md documents handler patterns but references direct bootstrap registration. With this refactor, the centralized `setupEventHandlers()` pattern should be mentioned.

**Section**: "Event Handler Registration"

**Recommended Addition** (after line 383):
```markdown
### Centralized Handler Setup (v0.3.4+)

Handler creation is centralized in `src/services/handler-setup.ts`:

```typescript
// In bootstrap.ts
const depsResult = extractHandlerDependencies(container);
if (!depsResult.ok) return depsResult;

const setupResult = await setupEventHandlers(depsResult.value);
if (!setupResult.ok) return setupResult;

// Registry available for shutdown
container.registerValue('handlerRegistry', setupResult.value.registry);
```

Benefits:
- Single place to add/remove handlers
- Testable in isolation from bootstrap
- Registry enables coordinated shutdown
```

---

### MEDIUM

#### M4. getDependency helper function lacks documentation
**File**: `/workspace/delegate/src/services/handler-setup.ts`
**Lines**: 57-73

**Issue**: Private helper function `getDependency` lacks JSDoc explaining its purpose and error behavior.

**Current**:
```typescript
/**
 * Extract a single dependency from container with typed error
 */
function getDependency<T>(
```

**Recommended**:
```typescript
/**
 * Extract a single dependency from container with typed error
 * 
 * Internal helper that wraps container.get() with DelegateError conversion.
 * Used by extractHandlerDependencies for consistent error formatting.
 * 
 * @param container - The DI container
 * @param key - The service registration key (e.g., 'logger', 'eventBus')
 * @returns Result<T> with DEPENDENCY_INJECTION_FAILED error code on failure
 */
function getDependency<T>(
```

---

#### M5. Bootstrap.ts comment references handler setup but link to module would help
**File**: `/workspace/delegate/src/bootstrap.ts`
**Lines**: 298-300

**Issue**: The comment explains the change but a direct file reference would help navigation.

**Current**:
```typescript
    // Wire up event handlers using centralized handler setup
    // ARCHITECTURE: Handler creation extracted to handler-setup.ts for maintainability
    // This enables easy addition of new handlers in v0.4.0 (Task Resumption, Scheduling)
```

**Recommended**:
```typescript
    // Wire up event handlers using centralized handler setup
    // @see src/services/handler-setup.ts for handler creation logic
    // ARCHITECTURE: Handler creation extracted for maintainability
    // This enables easy addition of new handlers in v0.4.0 (Task Resumption, Scheduling)
```

---

## Category 3: Pre-existing Issues (Not Blocking)

### INFORMATIONAL

#### I1. EventHandlerRegistry interface undocumented in handlers.ts
**File**: `/workspace/delegate/src/core/events/handlers.ts`
**Lines**: 101-181

**Issue**: The `EventHandlerRegistry` class used by this PR lacks comprehensive JSDoc. This is pre-existing.

---

#### I2. Missing architecture diagram for handler setup flow
**File**: `/workspace/delegate/docs/architecture/EVENT_FLOW.md`

**Issue**: The EVENT_FLOW.md has ASCII diagrams for task flows but no diagram showing handler initialization sequence. This would be helpful but is not caused by this PR.

---

#### I3. FEATURES.md does not list EventHandlerRegistry as architectural component
**File**: `/workspace/delegate/docs/FEATURES.md`
**Lines**: 143-150 (Architecture > Design Patterns section)

**Issue**: The architecture section mentions "Event Handlers" but not the registry pattern. Pre-existing omission.

---

## Summary

### Issues by Category

| Category | CRITICAL | HIGH | MEDIUM | LOW | INFORMATIONAL |
|----------|----------|------|--------|-----|---------------|
| Your Changes | 0 | 0 | 3 | 0 | 0 |
| Code You Touched | 0 | 2 | 2 | 0 | 0 |
| Pre-existing | 0 | 0 | 0 | 0 | 3 |

### Documentation Quality

**Code Documentation**:
- Module-level: Adequate but could be more comprehensive (M2)
- Function-level: Good JSDoc but missing examples (M1)
- Inline comments: Excellent architecture comments

**Test Documentation**:
- Test strategy not documented (M3)
- Individual test descriptions are clear

**Architecture Documentation**:
- EVENT_FLOW.md needs update for new pattern (H2)
- CLAUDE.md file locations outdated (H1)

### Merge Recommendation

**APPROVED WITH CONDITIONS**

This PR can be merged with the following conditions:

1. **Before Merge (SHOULD FIX)**:
   - Update CLAUDE.md File Locations table (H1) - 1 minute fix
   - Add @see reference in bootstrap.ts (M5) - 1 minute fix

2. **Follow-up PR (RECOMMENDED)**:
   - Update EVENT_FLOW.md with handler setup section (H2)
   - Enhance module-level documentation (M2)
   - Add test strategy documentation (M3)
   - Document getDependency helper (M4)

The code changes themselves are clean, well-architected, and follow project conventions. The documentation gaps are minor and do not affect functionality or maintainability significantly.

---

## Appendix: Files Analyzed

1. `/workspace/delegate/src/services/handler-setup.ts` (NEW - 242 lines)
2. `/workspace/delegate/src/bootstrap.ts` (MODIFIED)
3. `/workspace/delegate/tests/unit/services/handler-setup.test.ts` (NEW - 218 lines)
4. `/workspace/delegate/CLAUDE.md` (reference for file locations)
5. `/workspace/delegate/docs/architecture/EVENT_FLOW.md` (reference for handler patterns)
6. `/workspace/delegate/docs/FEATURES.md` (reference for architecture docs)
7. `/workspace/delegate/docs/ROADMAP.md` (reference for v0.4.0 plans)
8. `/workspace/delegate/src/core/events/handlers.ts` (EventHandlerRegistry implementation)
