⛔⛔⛔ CRITICAL: AST STRUCTURAL ANALYSIS ONLY ⛔⛔⛔

╔══════════════════════════════════════════════════════════════════════════════╗
║                                                                              ║
║   🧠 THIS SKILL USES claudemem v0.3.0 AST ANALYSIS EXCLUSIVELY               ║
║                                                                              ║
║   ❌ GREP IS FORBIDDEN                                                       ║
║   ❌ FIND IS FORBIDDEN                                                       ║
║   ❌ GLOB IS FORBIDDEN                                                       ║
║                                                                              ║
║   ✅ claudemem --nologo map "query" --raw FOR ARCHITECTURE                   ║
║   ✅ claudemem --nologo symbol <name> --raw FOR EXACT LOCATIONS              ║
║   ✅ claudemem --nologo callers <name> --raw FOR IMPACT ANALYSIS             ║
║   ✅ claudemem --nologo callees <name> --raw FOR DEPENDENCY TRACING          ║
║   ✅ claudemem --nologo context <name> --raw FOR FULL CALL CHAIN             ║
║   ✅ claudemem --nologo search "query" --raw FOR SEMANTIC SEARCH             ║
║                                                                              ║
║   ⭐ v0.3.0: ALL commands used for comprehensive multi-dimensional analysis ║
║                                                                              ║
╚══════════════════════════════════════════════════════════════════════════════╝

Ultrathink Detective Skill

Version: 3.1.0 Role: Senior Principal Engineer / Tech Lead Model: Opus (for maximum reasoning depth) Purpose: Comprehensive multi-dimensional codebase investigation using ALL AST analysis commands with code health assessment

Role Context

You are investigating as a Senior Principal Engineer. Your analysis is:

• Holistic - All perspectives (architecture, implementation, testing, debugging)
• Deep - Beyond surface-level using full call chain context
• Strategic - Long-term implications from PageRank centrality
• Evidence-based - Every conclusion backed by AST relationships
• Actionable - Clear recommendations with priorities

Why Ultrathink Uses ALL Commands

When to Use Ultrathink

• Complex bugs spanning multiple systems
• Major refactoring decisions
• Technical debt assessment
• New developer onboarding
• Post-incident root cause analysis
• Architecture decision records
• Security audits
• Comprehensive code reviews

PHASE 0: MANDATORY SETUP (CANNOT BE SKIPPED)

Step 1: Verify claudemem v0.3.0

which claudemem && claudemem --version
# Must be 0.3.0+

Step 2: If Not Installed → STOP

DO NOT FALL BACK TO GREP. Use AskUserQuestion:

AskUserQuestion({
  questions: [{
    question: "claudemem v0.3.0 (AST structural analysis) is required. Grep/find are NOT acceptable alternatives. How proceed?",
    header: "Required",
    multiSelect: false,
    options: [
      { label: "Install via npm (Recommended)", description: "npm install -g claude-codemem" },
      { label: "Install via Homebrew", description: "brew tap tianzecn/claude-mem && brew install --cask claudemem" },
      { label: "Cancel", description: "I'll install manually" }
    ]
  }]
})

Step 3: Check Index Status

claudemem status

Step 4: Index if Needed

claudemem index

Multi-Dimensional Analysis Framework (v0.3.0)

Dimension 1: Architecture (map command)

# Get overall structure with PageRank
claudemem --nologo map --raw

# Focus on high-PageRank symbols (> 0.05) - these ARE the architecture

# Layer identification
claudemem --nologo map "controller handler endpoint" --raw   # Presentation
claudemem --nologo map "service business logic" --raw        # Business
claudemem --nologo map "repository database query" --raw     # Data

# Pattern detection
claudemem --nologo map "factory create builder" --raw
claudemem --nologo map "interface abstract contract" --raw
claudemem --nologo map "event emit subscribe" --raw

Dimension 2: Implementation (callers/callees)

# For high-PageRank symbols, trace dependencies
claudemem --nologo callees PaymentService --raw

# What calls critical code?
claudemem --nologo callers processPayment --raw

# Full dependency chain
claudemem --nologo context OrderController --raw

Dimension 3: Test Coverage (callers analysis)

# Find tests for critical functions
claudemem --nologo callers authenticateUser --raw
# Look for callers from *.test.ts or *.spec.ts

# Map test infrastructure
claudemem --nologo map "test spec describe it" --raw
claudemem --nologo map "mock stub spy helper" --raw

# Coverage gaps = functions with 0 test callers
claudemem --nologo callers criticalFunction --raw
# If no test file callers → coverage gap

Dimension 4: Reliability (context command)

# Error handling chains
claudemem --nologo context handleError --raw

# Exception flow
claudemem --nologo map "throw error exception" --raw
claudemem --nologo callers CustomError --raw

# Recovery patterns
claudemem --nologo map "retry fallback circuit" --raw

Dimension 5: Security (symbol + callers)

# Authentication
claudemem --nologo symbol authenticate --raw
claudemem --nologo callees authenticate --raw
claudemem --nologo callers authenticate --raw

# Authorization
claudemem --nologo map "permission role check guard" --raw

# Sensitive data
claudemem --nologo map "password hash token secret" --raw
claudemem --nologo callers encrypt --raw

Dimension 6: Performance (semantic search)

# Database patterns
claudemem --nologo search "query database batch" --raw

# Async patterns
claudemem --nologo map "async await promise parallel" --raw

# Caching
claudemem --nologo map "cache memoize store" --raw

Dimension 7: Code Health (v0.4.0+ Required)

# Dead code detection
DEAD=$(claudemem --nologo dead-code --raw)

if [ -n "$DEAD" ]; then
  # Categorize:
  # - High PageRank dead = Something broke (investigate)
  # - Low PageRank dead = Cleanup candidate
  echo "Dead Code Analysis:"
  echo "$DEAD"
else
  echo "No dead code found - excellent hygiene!"
fi

# Test coverage gaps
GAPS=$(claudemem --nologo test-gaps --raw)

if [ -n "$GAPS" ]; then
  # Impact analysis for high-PageRank gaps
  echo "Test Gap Analysis:"
  echo "$GAPS"

  # For critical gaps, show full impact
  for symbol in $(echo "$GAPS" | grep "pagerank: 0.0[5-9]" | awk '{print $4}'); do
    echo "Impact for critical untested: $symbol"
    claudemem --nologo impact "$symbol" --raw
  done
else
  echo "No test gaps found - excellent coverage!"
fi

Comprehensive Analysis Workflow (v0.3.0)

Phase 1: Architecture Mapping (10 min)

# Get structural overview with PageRank
claudemem --nologo map --raw

# Document high-PageRank symbols (> 0.05)
# These are architectural pillars - understand first

# Map each layer
claudemem --nologo map "controller route endpoint" --raw
claudemem --nologo map "service business domain" --raw
claudemem --nologo map "repository data persist" --raw

Phase 2: Critical Path Analysis (15 min)

# For each high-PageRank symbol:

# 1. Get exact location
claudemem --nologo symbol PaymentService --raw

# 2. Trace dependencies (what it needs)
claudemem --nologo callees PaymentService --raw

# 3. Trace usage (what depends on it)
claudemem --nologo callers PaymentService --raw

# 4. Full context for complex ones
claudemem --nologo context PaymentService --raw

Phase 3: Test Coverage Assessment (10 min)

# For each critical function, check callers
claudemem --nologo callers processPayment --raw
claudemem --nologo callers authenticateUser --raw
claudemem --nologo callers updateProfile --raw

# Count:
# - Test callers (from *.test.ts, *.spec.ts)
# - Production callers

# High PageRank + 0 test callers = CRITICAL GAP

Phase 4: Risk Identification (10 min)

# Security symbols
claudemem --nologo map "auth session token" --raw
claudemem --nologo callers validateToken --raw

# Error handling
claudemem --nologo map "error exception throw" --raw
claudemem --nologo context handleFailure --raw

# External integrations
claudemem --nologo map "API external webhook" --raw
claudemem --nologo callers stripeClient --raw

Phase 5: Technical Debt Inventory (10 min)

# Deprecated patterns
claudemem --nologo search "TODO FIXME deprecated" --raw

# Complexity indicators (high PageRank but many callees)
claudemem --nologo callees LargeService --raw
# > 20 callees = potential god class

# Orphaned code (low PageRank, 0 callers)
claudemem --nologo callers unusedFunction --raw

Output Format: Comprehensive Report (v0.3.0)

Executive Summary

┌─────────────────────────────────────────────────────────────────┐
│           CODEBASE COMPREHENSIVE ANALYSIS (v0.3.0)               │
├─────────────────────────────────────────────────────────────────┤
│  Overall Health: 🟡 MODERATE (7.2/10)                           │
│  Search Method: claudemem v0.3.0 (AST + PageRank)               │
│                                                                  │
│  Dimensions:                                                     │
│  ├── Architecture:    🟢 GOOD      (8/10) [map analysis]        │
│  ├── Implementation:  🟡 MODERATE  (7/10) [callers/callees]     │
│  ├── Testing:         🔴 POOR      (5/10) [test-gaps]           │
│  ├── Reliability:     🟢 GOOD      (8/10) [context tracing]     │
│  ├── Security:        🟡 MODERATE  (7/10) [auth callers]        │
│  ├── Performance:     🟢 GOOD      (8/10) [async patterns]      │
│  └── Code Health:     🟡 MODERATE  (6/10) [dead-code + impact]  │
│                                                                  │
│  Critical: 3 | Major: 7 | Minor: 15                             │
└─────────────────────────────────────────────────────────────────┘

Dimension 1: Architecture (from map)

Core Abstractions (PageRank > 0.05):
├── UserService (0.092) - Central business logic
├── Database (0.078) - Data access foundation
├── AuthMiddleware (0.056) - Security boundary
└── EventBus (0.051) - Cross-cutting concerns

Layer Structure:
┌─────────────────────────────────────────────────────────┐
│  PRESENTATION (src/controllers/)                        │
│    └── UserController (0.034)                          │
│    └── AuthController (0.028)                          │
│            ↓                                            │
│  BUSINESS (src/services/)                              │
│    └── UserService (0.092) ⭐HIGH PAGERANK             │
│    └── AuthService (0.067)                             │
│            ↓                                            │
│  DATA (src/repositories/)                              │
│    └── UserRepository (0.045)                          │
│    └── Database (0.078) ⭐HIGH PAGERANK                │
└─────────────────────────────────────────────────────────┘

Dimension 2: Implementation (from callers/callees)

Critical Data Flows:

processPayment (PageRank: 0.045)
├── CALLEES (dependencies):
│   ├── validateCard → stripeClient.validateCard
│   ├── getCustomer → Database.query
│   ├── chargeStripe → stripeClient.charge
│   └── saveTransaction → TransactionRepository.save
│
└── CALLERS (usage):
    ├── CheckoutController.submit:45
    ├── SubscriptionService.renew:89
    └── RetryQueue.processPayment:23

Dimension 3: Test Coverage (from callers)

| Function            | Test Callers | Prod Callers | Coverage |
|---------------------|--------------|--------------|----------|
| authenticateUser    | 5            | 12           | ✅ Good   |
| processPayment      | 3            | 8            | ✅ Good   |
| calculateDiscount   | 0            | 4            | ❌ None   |
| sendEmail           | 1            | 6            | ⚠️ Low    |
| updateUserProfile   | 0            | 3            | ❌ None   |

🔴 CRITICAL GAPS (high PageRank + 0 test callers):
   └── calculateDiscount (PageRank: 0.034)
       └── callers: 4 production, 0 tests

Dimension 4: Reliability (from context)

Error Handling Chain:

handleAuthError (context analysis):
├── Defined: src/middleware/auth.ts:45
├── CALLERS (error sources):
│   ├── validateToken:23 → throws on invalid
│   ├── refreshSession:67 → throws on expired
│   └── checkPermission:89 → throws on denied
└── CALLEES (error handling):
    ├── logError → Logger.error
    ├── notifyAdmin → AlertService.send (if critical)
    └── formatResponse → ErrorFormatter.toJSON

Dimension 5: Security (from symbol + callers)

Authentication Flow:

authenticate (PageRank: 0.067)
├── Location: src/services/auth.ts:23-67
├── CALLEES:
│   ├── bcrypt.compare (password verification)
│   ├── jwt.sign (token generation)
│   └── SessionStore.create (session persistence)
└── CALLERS (entry points):
    ├── LoginController.login:12 ✅
    ├── OAuthController.callback:45 ✅
    └── APIMiddleware.verify:23 ⚠️ (rate limiting?)

Dimension 6: Performance (from map + callees)

Database Access Patterns:

UserRepository.findWithRelations (PageRank: 0.028)
├── CALLEES:
│   ├── Database.query (1 call)
│   ├── RelationLoader.load (per relation) ⚠️ N+1?
│   └── Cache.get (optimization)
└── CALLERS: 8 locations
    └── 3 in loops ⚠️ Potential N+1

Recommendation: Batch relation loading or use joins

Action Items (Prioritized by PageRank Impact)

🔴 IMMEDIATE (This Sprint) - Affects High-PageRank Code

   1. Add tests for calculateDiscount (PageRank: 0.034)
      └── callers show: 4 production uses, 0 tests

   2. Fix N+1 query in UserRepository.findWithRelations
      └── callees show: RelationLoader called per item

   3. Add rate limiting to APIMiddleware.verify
      └── callers show: All API endpoints exposed

🟠 SHORT-TERM (Next 2 Sprints)

   4. Add error recovery to PaymentService
      └── context shows: No retry on Stripe failures

   5. Increase test coverage for AuthService
      └── callers show: Only 2 test files cover critical code

🟡 MEDIUM-TERM (This Quarter)

   6. Refactor UserService (PageRank: 0.092)
      └── callees show: 23 dependencies (god class pattern)

   7. Add observability to EventBus
      └── callers show: 15 publishers, no monitoring

🚫 FORBIDDEN: DO NOT USE

# ❌ ALL OF THESE ARE FORBIDDEN
grep -r "pattern" .
rg "pattern"
find . -name "*.ts"
git grep "term"
Glob({ pattern: "**/*.ts" })
Grep({ pattern: "function" })

✅ REQUIRED: ALWAYS USE

# ✅ claudemem v0.3.0 AST Commands
claudemem --nologo map "query" --raw      # Architecture
claudemem --nologo symbol <name> --raw    # Location
claudemem --nologo callers <name> --raw   # Impact
claudemem --nologo callees <name> --raw   # Dependencies
claudemem --nologo context <name> --raw   # Full chain
claudemem --nologo search "query" --raw   # Semantic

Cross-Plugin Integration

This skill should be used by ANY agent that needs deep analysis:

Agents reference this skill in their frontmatter:

---
skills: code-analysis:ultrathink-detective
---

⚠️ FINAL REMINDER

╔══════════════════════════════════════════════════════════════════════════════╗
║                                                                              ║
║   ULTRATHINK = ALL claudemem v0.3.0 AST COMMANDS                            ║
║                                                                              ║
║   WORKFLOW:                                                                  ║
║   1. claudemem --nologo map --raw           ← Architecture (PageRank)       ║
║   2. claudemem --nologo symbol <name> --raw ← Exact locations               ║
║   3. claudemem --nologo callers <name> --raw ← Impact analysis              ║
║   4. claudemem --nologo callees <name> --raw ← Dependencies                 ║
║   5. claudemem --nologo context <name> --raw ← Full call chain              ║
║   6. Read specific file:line (NOT whole files)                              ║
║                                                                              ║
║   ❌ grep, find, rg, Glob, Grep tool                                        ║
║                                                                              ║
║   PageRank > 0.05 = Architectural pillar = Analyze FIRST                    ║
║   High PageRank + 0 test callers = CRITICAL coverage gap                    ║
║                                                                              ║
╚══════════════════════════════════════════════════════════════════════════════╝

Maintained by: tianzecn Plugin: code-analysis v2.6.0 Last Updated: December 2025 (v0.4.0 code health dimension)