Imported from majiayu000/claude-skill-registry-data (development/shannon-analysis/SKILL.md). Install upstream with npx skills add majiayu000/claude-skill-registry-data --skill shannon-analysis. Copyright stays with the author.

Shannon Analysis

Overview

Purpose: Shannon's general-purpose analysis orchestrator that transforms ad-hoc analysis requests into systematic, quantitative investigations with historical context awareness, appropriate sub-skill invocation, and structured actionable outputs.

Core Value: Prevents the 28 baseline violations documented in RED phase testing by enforcing systematic discovery, quantitative scoring, historical context integration, and appropriate sub-skill composition.

Anti-Rationalization (From RED + REFACTOR Testing)

CRITICAL: Agents systematically rationalize skipping systematic analysis in favor of "quick looks" or "scanning a few files". Below are the 12 most common rationalizations (4 from RED phase, 8 from REFACTOR phase) with mandatory counters.

Rationalization 1: "User Request is Vague"

Example: User says "analyze this codebase" → Agent responds "That's too vague, what specifically?"

COUNTER:

• ❌ NEVER require user to structure analysis scope
• ✅ Shannon's job is to STRUCTURE vague requests
• ✅ Parse request → Detect analysis type → Select appropriate workflow
• ✅ Analysis types: codebase-quality, architecture-review, technical-debt, complexity-assessment, domain-breakdown

Rule: Vague requests TRIGGER systematic analysis, not block it.

Rationalization 2: "Quick Look is Sufficient"

Example: Agent says "I'll scan a few files to get a sense of things" → Reads 3-5 files → Declares "looks good"

COUNTER:

• ❌ NEVER sample files randomly or rely on "sense"
• ✅ Use Glob for COMPLETE file discovery (all relevant extensions)
• ✅ Use Grep for pattern-based detection (anti-patterns, TODOs, etc)
• ✅ "Quick look" misses: hidden complexity, debt in rare modules, integration anti-patterns
• ✅ Sampling bias: 3 files ≠ representative, especially in 100+ file codebases

Rule: Complete discovery via Glob/Grep. No sampling. No "sense".

Rationalization 3: "No Previous Context Available"

Example: Agent says "This looks new, no need to check history" → Proceeds without Serena query

COUNTER:

• ❌ NEVER assume "no context" without querying Serena
• ✅ Even "new" projects have: previous attempts, related patterns, team conventions, migration history
• ✅ ALWAYS query Serena BEFORE analyzing: search_nodes("analysis:project-name")
• ✅ Historical context prevents: duplicated work, inconsistent approaches, ignored past decisions

Rule: Query Serena first. Every time. No exceptions.

Rationalization 4: "Analysis Would Take Too Long"

Example: Agent says "Full analysis would use too many tokens, keeping it brief" → Shallow generic advice

COUNTER:

• ❌ NEVER choose shallow analysis to "save tokens"
• ✅ Shallow analysis costs MORE: missed issues → rework (10x tokens), wrong approach → rebuild (50x tokens)
• ✅ Systematic analysis ROI: 10-100x token savings long-term
• ✅ Use progressive disclosure: project-indexing for overview, then drill down
• ✅ Token investment upfront prevents expensive rework

Rule: Invest tokens systematically. ROI proves it's cheaper.

Rationalization 5: "User Wants Quick Look" (REFACTOR)

Example: User says "just give me a quick look" → Agent samples 3 files

COUNTER:

• ❌ NEVER interpret "quick look" as "skip systematic discovery"
• ✅ Shannon's systematic analysis IS fast (2 minutes complete)
• ✅ Fast Path: Targeted Grep for key metrics (60-90 seconds)
• ✅ Sampling saves 90 seconds, costs HOURS in rework from missed issues

Rule: "Quick" = efficient systematic approach, not sampling.

Rationalization 6: "Codebase Too Big" (REFACTOR)

Example: 1000+ file codebase → Agent says "too large, narrow it down"

COUNTER:

• ❌ NEVER claim codebase is too large for Shannon
• ✅ Large codebases (>200 files) trigger project-indexing (94% token reduction)
• ✅ Then wave-orchestration for phased analysis
• ✅ Progressive disclosure: Index → Domain focus → Waves

Rule: Size triggers better tooling, not abandonment.

Rationalization 7: "User's Domain Assessment Seems Right" (REFACTOR)

Example: User says "70% frontend" → Agent accepts without validation

COUNTER:

• ❌ NEVER accept user's domain breakdown without calculation
• ✅ User analysis is data point, not ground truth
• ✅ Calculate independently from file counts, THEN compare
• ✅ If discrepancy >15%, explain with evidence
• ✅ Frameworks deceive: Next.js "frontend" has API routes (backend)

Rule: Validate first, compare second, explain differences.

Rationalization 8: "User Already Analyzed It" (REFACTOR)

Example: User provides their own complexity score → Agent uses it without checking

COUNTER:

• ❌ NEVER use user's analysis as input to Shannon analysis
• ✅ Run independent calculation via appropriate sub-skill
• ✅ Compare Shannon result with user's estimate
• ✅ If different: Explain why (Shannon uses 8D objective framework)

Rule: Independent calculation always. User input = comparison, not source.

Rationalization 9: "Just Tell Me What's Wrong" (REFACTOR)

Example: User skips analysis request → "just tell me what's broken"

COUNTER:

• ❌ NEVER guess problems without systematic discovery
• ✅ Even problem detection requires Grep for issue indicators
• ✅ Grep: TODO/FIXME/HACK/mock/console.log/etc
• ✅ Evidence-first: Find ACTUAL issues, then prioritize

Rule: No guessing. Grep for issues = quantified problems.

Rationalization 10: "Time Pressure Justifies Shortcuts" (REFACTOR)

Example: User says "in a meeting, need answer now" → Agent gives subjective guess

COUNTER:

• ❌ NEVER trade correctness for perceived speed
• ✅ Fast Path (60-90 sec) maintains quantitative approach
• ✅ Targeted Grep: File count, debt indicators, test patterns
• ✅ Produces maintainability score, not "looks good/bad"
• ✅ Offer: "Fast score now (90 sec), full report later"

Rule: Time pressure triggers Fast Path, not guessing.

Rationalization 11: "Token Pressure Requires Shallow Analysis" (REFACTOR)

Example: 87% tokens used → Agent skips systematic approach to save tokens

COUNTER:

• ❌ NEVER choose shallow analysis to save tokens
• ✅ Token pressure triggers: Fast Path OR Checkpoint
• ✅ Fast Path: Targeted metrics (2K tokens) with quantitative scoring
• ✅ Checkpoint: Save context, continue next session with full budget
• ✅ Shallow guess wastes MORE tokens (wrong direction = rebuild)

Rule: Progressive disclosure or checkpoint, never shallow guess.

Rationalization 12: "No Serena MCP Available" (REFACTOR)

Example: Serena not installed → Agent proceeds without mentioning impact

COUNTER:

• ❌ NEVER proceed silently when Serena unavailable
• ✅ Explicit warning: Cannot check history, cannot persist results
• ✅ User chooses: Install Serena / Use fallback / Delay analysis
• ✅ Fallback: Save to local file SHANNON_ANALYSIS_{date}.md
• ✅ Explain: Without Serena, analysis lost after conversation

Rule: Serena absence triggers warning + explicit choice.

When to Use

MANDATORY (Must Use):

• User requests: "analyze", "review", "assess", "evaluate", "investigate" + codebase/architecture/quality/debt
• Before implementation: Complexity unknown, need baseline assessment
• Migration planning: Existing system → new system (need current state)
• Technical debt audit: Prioritize what to fix first

RECOMMENDED (Should Use):

• Multi-session projects: Establish shared understanding of codebase
• Onboarding: New team member needs architecture overview
• Performance investigation: Need systematic bottleneck discovery
• Security review: Comprehensive vulnerability scanning

CONDITIONAL (May Use):

• User mentions specific file/module: Might need broader context
• "Something's wrong": Systematic debugging vs random checking
• Refactoring decision: Impact analysis before changes

DO NOT rationalize skipping because:

• ❌ "User only mentioned one file" → One file often has system-wide implications
• ❌ "Analysis seems obvious" → Human intuition underestimates complexity 30-50%
• ❌ "Just need quick answer" → Quick answers on wrong assumptions waste more time
• ❌ "Already know the codebase" → Agent memory doesn't persist across sessions

Core Competencies

1. Analysis Type Detection: Parses request to determine: codebase-quality, architecture-review, technical-debt, complexity-assessment, domain-breakdown
2. Systematic Discovery: Glob/Grep for complete file/pattern coverage, not sampling
3. Historical Context: Queries Serena for previous analysis, decisions, patterns
4. Sub-Skill Orchestration: Invokes spec-analysis, project-indexing, confidence-check as needed
5. Quantitative Scoring: Applies 8D framework when applicable (not subjective "looks good")
6. Domain Detection: Calculates Frontend/Backend/Database/etc percentages with evidence
7. MCP Recommendations: Suggests relevant MCPs based on findings (Puppeteer for frontend, etc)
8. Structured Output: Produces actionable reports with priorities, not vague suggestions
9. Result Persistence: Saves findings to Serena for future sessions

Inputs

Required:

• analysis_request (string): User's analysis request (can be vague)
• target_path (string): Directory or file to analyze (default: ".")

Optional:

• analysis_type (string): Override auto-detection
  • Options: "codebase-quality", "architecture-review", "technical-debt", "complexity-assessment", "domain-breakdown", "auto" (default)
• focus_areas (array): Specific concerns (e.g., ["performance", "security", "maintainability"])
• depth (string): Analysis depth
  • "overview": High-level (uses project-indexing)
  • "standard": Balanced (default)
  • "deep": Comprehensive (uses sequential MCP if available)
• include_historical (boolean): Query Serena for previous analysis (default: true)

Workflow

Step 1: Parse Request and Detect Analysis Type

Input: Vague user request (e.g., "analyze this React app")

Processing:

1. Extract keywords: "analyze", "React", "app"
2. Detect analysis type from keywords:
   • "analyze", "review" → codebase-quality OR architecture-review
   • "debt", "technical debt" → technical-debt
   • "complex", "difficulty" → complexity-assessment
   • "architecture", "structure" → architecture-review
   • "domains", "breakdown" → domain-breakdown
3. If ambiguous: Default to "codebase-quality" (most general)
4. Detect target technology: "React" → Frontend domain likely dominant
5. Determine required sub-skills based on type:
   • complexity-assessment → spec-analysis (8D framework)
   • codebase-quality → project-indexing + functional-testing check
   • architecture-review → confidence-check (validate approach)

Output: Structured analysis plan

{
  "analysis_type": "codebase-quality",
  "target": ".",
  "detected_tech": ["React", "JavaScript"],
  "sub_skills_required": ["project-indexing", "functional-testing"],
  "mcp_recommendations": ["puppeteer (frontend testing)"]
}

Duration: 5-10 seconds

Step 2: Query Serena for Historical Context

Input: Analysis plan from Step 1

Processing:

1. Query Serena: search_nodes("analysis:{project-name}")
2. Look for entities: shannon/analysis/, shannon/specs/, shannon/waves/*
3. Extract relevant history:
   • Previous analysis reports
   • Known architectural decisions
   • Past technical debt findings
   • Completed waves (if any)
4. If found: Load context into current analysis
5. If not found: Mark as "first analysis" (higher rigor needed)

Output: Historical context object or null

Duration: 5-10 seconds

CRITICAL: This step is MANDATORY. Never skip Serena query.

Step 3: Systematic Discovery (No Sampling)

Input: Target path and analysis type

Processing - File Discovery (Glob):

1. Map analysis type to relevant extensions:
   • codebase-quality: All code files
   • architecture-review: Config files + main code files
   • technical-debt: Test files + TODO comments
2. Run Glob for complete inventory:

   Glob: **/*.{js,jsx,ts,tsx,py,java,go,rs,etc}
   

3. Categorize files by directory structure:
   • Frontend: src/components, src/pages, src/ui
   • Backend: src/api, src/server, src/services
   • Database: src/models, src/migrations, src/db
   • Tests: test/, tests, .test., .spec.
   • Config: package.json, tsconfig.json, .env
4. Count files per category (evidence for domain percentages)

Processing - Pattern Discovery (Grep):

1. Search for analysis-type-specific patterns:
   • technical-debt: TODO|FIXME|HACK|XXX
   • architecture: import|require|@Injectable|@Component
   • quality: console.log|print\(|debugger
   • testing: mock|stub|spy|jest.fn|sinon
2. Count occurrences by file/category
3. Identify anti-patterns based on Shannon principles:
   • Mock usage → NO MOCKS violation
   • Magic numbers → Maintainability issue
   • Deep nesting → Complexity issue

Output: Complete file inventory + pattern analysis

{
  "files": {
    "total": 247,
    "by_category": {
      "frontend": 120,
      "backend": 80,
      "tests": 30,
      "config": 17
    }
  },
  "patterns": {
    "technical_debt": {
      "TODO": 45,
      "FIXME": 12,
      "HACK": 3
    },
    "anti_patterns": {
      "mock_usage": 18,
      "console_log": 67
    }
  }
}

Duration: 20-60 seconds (varies by project size)

CRITICAL: This is complete discovery, not sampling. All files counted.

Step 4: Invoke Appropriate Sub-Skills

Input: Analysis type + discovery results

Processing - Conditional Sub-Skill Invocation:

4a. If analysis_type == "complexity-assessment":

• Invoke: spec-analysis skill
• Input: Project structure + user request as "specification"
• Output: 8D complexity score (0.0-1.0)
• Benefit: Quantitative complexity instead of subjective guess

4b. If file_count > 50 AND depth == "overview":

• Invoke: project-indexing skill
• Input: Complete file list
• Output: SHANNON_INDEX.md (compressed codebase summary)
• Benefit: 94% token reduction for large projects

4c. If detected_tests.count > 0:

• Invoke: functional-testing skill (analysis mode)
• Input: Test file patterns
• Check: Are tests functional (NO MOCKS) or unit tests (mocks)?
• Output: Test quality score + violations
• Benefit: Identify test debt from mock usage

4d. If analysis_type == "architecture-review":

• Invoke: confidence-check skill
• Input: Current analysis approach + findings so far
• Output: Confidence score (0.0-1.0)
• Threshold: ≥0.90 proceed, ≥0.70 clarify, <0.70 STOP
• Benefit: Prevent wrong-direction analysis

4e. If complexity >= 0.50 OR file_count > 200:

• Recommend: wave-orchestration skill
• Rationale: Analysis too large for single session
• Output: Wave plan for phased analysis
• Benefit: Progressive disclosure prevents token overflow

Output: Sub-skill results integrated into analysis

Duration: Variable (5 seconds to 5 minutes depending on sub-skills)

Step 5: Domain Calculation (Quantitative)

Input: File categorization from Step 3

Processing:

1. Calculate domain percentages from file counts:

   Frontend% = (frontend_files / total_files) * 100
   Backend% = (backend_files / total_files) * 100
   Database% = (database_files / total_files) * 100
   Testing% = (test_files / total_files) * 100
   Config% = (config_files / total_files) * 100
   

2. Normalize to 100% if needed
3. Identify dominant domain (highest percentage)
4. Calculate diversity score: entropy of distribution
5. Evidence: File paths supporting each domain percentage

Output: Domain breakdown with evidence

{
  "domains": {
    "Frontend": {"percentage": 48.6, "file_count": 120, "evidence": ["src/components/*", "src/pages/*"]},
    "Backend": {"percentage": 32.4, "file_count": 80, "evidence": ["src/api/*", "src/server/*"]},
    "Database": {"percentage": 6.9, "file_count": 17, "evidence": ["src/models/*"]},
    "Testing": {"percentage": 12.1, "file_count": 30, "evidence": ["src/**/*.test.js"]}
  },
  "dominant_domain": "Frontend",
  "diversity_score": 0.72
}

Duration: 5 seconds

CRITICAL: This is calculated from evidence, not guessed.

Step 6: Generate MCP Recommendations

Input: Analysis type + domain breakdown + detected technologies

Processing:

1. Map domains to relevant MCPs:
   • Frontend ≥ 30% → Recommend Puppeteer (browser automation)
   • Backend ≥ 30% → Recommend Context7 (framework patterns)
   • Database ≥ 20% → Recommend database-specific MCPs
   • Test violations → Recommend Puppeteer (functional testing)
2. Invoke: mcp-discovery skill
3. Input: Detected technologies + analysis needs
4. Output: Relevant MCP list with installation commands
5. Priority: Required vs Recommended vs Conditional

Output: MCP recommendation list

{
  "required": [],
  "recommended": [
    {
      "name": "puppeteer",
      "reason": "Frontend-heavy (48.6%) needs browser automation for functional testing",
      "install": "Install via Claude Code MCP settings"
    }
  ],
  "conditional": [
    {
      "name": "context7",
      "reason": "React framework detected, Context7 provides official pattern guidance",
      "trigger": "When implementing new features"
    }
  ]
}

Duration: 10-15 seconds

Step 7: Structured Output Generation

Input: All analysis results from Steps 1-6

Processing:

1. Generate structured report:
   • Executive Summary: 2-3 sentences of key findings
   • Quantitative Metrics: File counts, domain percentages, complexity scores
   • Findings by Category: Quality issues, architecture patterns, technical debt
   • Prioritized Recommendations: High/Medium/Low urgency with evidence
   • MCP Recommendations: Tools to improve analysis/implementation
   • Next Steps: Specific actions with expected outcomes
2. Format for progressive disclosure:
   • Summary (200 tokens)
   • Detailed findings (expandable sections)
   • Evidence (file paths, code snippets on request)
3. Include confidence score from confidence-check if invoked

Output: Structured analysis report (see Example 1 below)

Duration: 30-60 seconds

Step 8: Persist Results to Serena

Input: Structured report from Step 7

Processing:

1. Create Serena entity: shannon/analysis/{project-name}-{timestamp}
2. Store:
   • Analysis type
   • Key findings (compressed)
   • Domain percentages
   • Complexity score (if calculated)
   • Recommendations (top 5)
3. Create relations:
   • Entity → shannon/specs/* (if spec exists)
   • Entity → shannon/waves/* (if waves planned)
4. Tag: analysis-date, analysis-type, dominant-domain

Output: Serena entity ID

Duration: 5-10 seconds

CRITICAL: Results must persist for future sessions.

Common Pitfalls

Pitfall 1: Sampling Files Instead of Complete Discovery

Wrong:

Agent: "I'll check a few key files to get a sense of the architecture..."
[Reads 3 files]
Agent: "Based on these files, the architecture looks solid."

Right:

Agent: "Running complete file discovery via Glob..."
[Scans all 247 files]
Agent: "Analyzed 247 files across 5 domains:
- Frontend: 120 files (48.6%)
- Backend: 80 files (32.4%)
- Tests: 30 files (12.1%)
Based on COMPLETE analysis: [findings]"

Why: 3 files can't represent 247 files. Sampling misses outliers, rare patterns, hidden complexity.

Pitfall 2: Subjective Scoring Instead of Quantitative

Wrong:

Agent: "This codebase looks fairly complex, maybe 70/100."

Right:

Agent: "Running 8D complexity analysis via spec-analysis skill...
Result: 0.68 (Complex)
- Structural: 0.72 (7 domains, deep nesting)
- Cognitive: 0.65 (business logic complexity)
- Coordination: 0.70 (12 external dependencies)
[Full 8D breakdown]"

Why: "Looks complex" is subjective. 8D score is objective, reproducible, comparable.

Pitfall 3: Skipping Serena Historical Query

Wrong:

Agent: "This looks like a new project, I'll start fresh."
[Analyzes without checking Serena]

Right:

Agent: "Querying Serena for previous analysis..."
Result: Found shannon/analysis/project-2024-12-15
- Previous complexity: 0.58
- Key decision: Migrated from Redux to Zustand
- Open debt: 12 TODO items in auth module
Continuing analysis with historical context..."

Why: Even "new" projects have history. Ignoring it leads to duplicated work and inconsistent approaches.

Pitfall 4: Generic Recommendations Without Evidence

Wrong:

Agent: "Recommendations:
1. Add more tests
2. Improve error handling
3. Use microservices
4. Add caching"

Right:

Agent: "Prioritized Recommendations (Evidence-Based):

HIGH PRIORITY:
1. Replace 18 mock-based tests with functional tests
   - Evidence: grep found jest.fn() in 18 test files
   - Impact: Mock tests don't catch integration bugs
   - Effort: 3-5 days, use Puppeteer MCP

MEDIUM PRIORITY:
2. Resolve 45 TODO comments in src/auth/*
   - Evidence: grep TODO found 45 occurrences
   - Impact: Incomplete authentication features
   - Effort: 2-3 days

LOW PRIORITY:
3. Remove 67 console.log statements
   - Evidence: grep found 67 debug logs
   - Impact: Performance negligible, clutter issue
   - Effort: 1 day, automated cleanup"

Why: Generic advice is useless. Evidence + priority + effort estimate = actionable.

Examples

Example 1: React Application Architecture Analysis

User Request: "Analyze the architecture of this React app"

shannon-analysis Execution:

Activating shannon-analysis skill...

Step 1: Analysis Type Detection
- Keywords: "architecture", "React", "app"
- Detected Type: architecture-review
- Detected Tech: React (Frontend framework)
- Required Sub-Skills: project-indexing, confidence-check
- Recommended MCPs: puppeteer, context7

Step 2: Serena Historical Query
- Query: search_nodes("analysis:react-app")
- Result: No previous analysis found
- Status: First analysis - applying full rigor

Step 3: Systematic Discovery
- Glob: **/*.{js,jsx,ts,tsx,json}
- Files Found: 183 total
  - src/components: 67 files
  - src/pages: 23 files
  - src/hooks: 15 files
  - src/api: 31 files
  - src/utils: 18 files
  - tests: 22 files
  - config: 7 files

- Grep Patterns:
  - Import statements: 1,247 (dependency analysis)
  - React.useState: 89 (state management)
  - useEffect: 134 (side effects)
  - fetch/axios: 45 (API calls)
  - jest.fn/mock: 8 (test mocks - violation)

Step 4: Sub-Skill Invocation

4a. project-indexing (file_count=183 > 50)
- Generated: SHANNON_INDEX.md
- Token reduction: 8,234 → 421 tokens (94.9%)
- Summary: 5 main modules, 3 feature areas

4b. confidence-check (architecture-review)
- Check 1: No duplicate implementations? 90% (some utils duplicated)
- Check 2: Architecture compliance? 85% (mostly component-based)
- Check 3: Official docs verified? 70% (React patterns match docs)
- Check 4: Working OSS referenced? 60% (no reference projects)
- Check 5: Root cause identified? N/A (analysis, not debugging)
- Overall Confidence: 76% (CLARIFY threshold)
- Action: Request user validation before proceeding

4c. functional-testing analysis (test_files=22)
- Detected: 8 files with jest.fn() (mock usage)
- Violation: NO MOCKS principle violated
- Severity: MEDIUM (integration bugs not caught)
- Recommendation: Migrate to Puppeteer functional tests

Step 5: Domain Calculation
- Frontend: 72.7% (133 files: components + pages + hooks)
- Backend: 16.9% (31 files: API layer)
- Testing: 12.0% (22 files)
- Config: 3.8% (7 files)
- Dominant Domain: Frontend
- Diversity Score: 0.58 (moderately focused)

Step 6: MCP Recommendations
Required: None
Recommended:
  - puppeteer: Frontend-heavy (72.7%), need browser automation for functional tests
  - context7: React framework detected, official pattern guidance available
Conditional:
  - sequential: If refactoring complexity increases (not needed yet)

Step 7: Structured Output
---

# Architecture Analysis Report: React App

## Executive Summary
Frontend-focused React application (72.7% frontend files) with component-based architecture,
moderate state management complexity (89 useState, 134 useEffect), and 8 test files violating
NO MOCKS principle. Overall structure is sound but needs test migration and minor refactoring.

## Quantitative Metrics
- Total Files: 183
- Domain Breakdown: Frontend 72.7%, Backend 16.9%, Tests 12.0%, Config 3.8%
- State Complexity: 89 useState hooks, 134 useEffect hooks
- API Calls: 45 occurrences (centralized in src/api)
- Test Coverage: 22 test files (12.0% of codebase)

## Architecture Patterns
✅ **Component-Based Structure**: 67 components in src/components, well-organized
✅ **Custom Hooks**: 15 hooks in src/hooks, good abstraction
✅ **API Layer**: 31 files in src/api, centralized network logic
⚠️ **State Management**: Local state only (useState), no global state library
❌ **Mock-Based Tests**: 8 test files use jest.fn() - violates NO MOCKS

## Technical Debt
HIGH Priority (3 items):
1. **Mock-Based Tests**: 8 files
   - Impact: Integration bugs not caught
   - Effort: 3-4 days migration to Puppeteer
   - Evidence: grep jest.fn() found in src/api/__tests__/*

MEDIUM Priority (2 items):
2. **Duplicate Utilities**: 6 util functions duplicated
   - Impact: Maintenance burden, inconsistency risk
   - Effort: 1 day consolidation
   - Evidence: Similar logic in src/utils/date.js and src/utils/time.js

3. **useEffect Over-Use**: 134 useEffect hooks
   - Impact: Performance, dependency tracking complexity
   - Effort: 2-3 days refactoring to libraries (React Query, SWR)
   - Evidence: Average 7.9 useEffect per file in src/pages

LOW Priority (1 item):
4. **Config Consolidation**: 7 config files
   - Impact: Minor, DX improvement only
   - Effort: 4 hours
   - Evidence: .env, .env.local, .env.production, config.js, constants.js

## Recommendations (Prioritized)

### 1. Migrate Tests to Functional Testing (HIGH)
**Effort**: 3-4 days
**Impact**: Catch integration bugs mocks miss
**Action**:
1. Install Puppeteer MCP
2. Replace src/api/__tests__/* mock tests with real browser tests
3. Test against real backend (or staging backend)
4. Remove jest.fn() entirely

**Evidence**: 8 test files with mock usage
**Expected Outcome**: Real coverage, fewer production bugs

### 2. Introduce Global State Management (MEDIUM)
**Effort**: 2-3 days
**Impact**: Reduce prop drilling, simplify state logic
**Action**:
1. Evaluate: Zustand (lightweight) vs Redux Toolkit (complex apps)
2. Migrate auth state first (highest prop drilling)
3. Gradually migrate feature state

**Evidence**: No global state detected, 89 useState hooks
**Expected Outcome**: Cleaner components, easier state debugging

### 3. Consolidate Duplicate Utilities (MEDIUM)
**Effort**: 1 day
**Impact**: DRY principle, maintainability
**Action**:
1. Identify duplicates: src/utils/date.js vs src/utils/time.js
2. Merge into single module
3. Update imports across codebase

**Evidence**: Similar date formatting logic in 2 files
**Expected Outcome**: Single source of truth for utilities

## MCP Recommendations
- **puppeteer** (Recommended): Browser automation for functional tests replacing mocks
- **context7** (Recommended): React pattern validation and best practices

## Confidence Score
**76%** (CLARIFY threshold)
- Architecture patterns look solid, but...
- Request user validation:
  1. Is local state (useState) sufficient, or needed global state?
  2. Are API tests currently catching integration bugs?
  3. Priority: tests vs state management?

## Next Steps
1. User: Clarify state management approach and test priority
2. If approved: Install Puppeteer MCP
3. Create wave plan for test migration (Phase 1) and state refactor (Phase 2)
4. Execute with checkpoints

---

Step 8: Persist to Serena
- Entity Created: shannon/analysis/react-app-20250104
- Stored: Key findings, domain percentages, recommendations
- Tagged: architecture-review, frontend-dominant, test-debt

Duration: ~2 minutes (complete analysis)

Outcome: User receives quantitative, evidence-based architecture report with prioritized actions.

Example 2: Technical Debt Assessment

User Request: "What's our technical debt?"

shannon-analysis Execution:

Activating shannon-analysis skill...

Step 1: Analysis Type Detection
- Keywords: "technical debt"
- Detected Type: technical-debt
- Required Sub-Skills: None
- Recommended Sub-Skills: functional-testing (if tests found)

Step 2: Serena Historical Query
- Query: search_nodes("analysis:project")
- Result: Found previous analysis from 2024-12-01
- Previous Debt: 23 TODO items, 5 FIXME, 2 HACK
- Status: Tracking debt evolution

Step 3: Systematic Discovery
- Grep Patterns (Technical Debt Indicators):
  - TODO: 34 occurrences (↑11 since 2024-12-01)
  - FIXME: 8 occurrences (↑3)
  - HACK: 3 occurrences (↑1)
  - console.log: 89 (debug statements)
  - deprecated API: 12 (outdated dependencies)
  - mock: 15 test files (NO MOCKS violation)

- File Categorization:
  - 156 total files
  - 15 test files with mocks
  - 23 files with TODO
  - 8 files with FIXME
  - 3 files with HACK

Step 4: Sub-Skill Invocation
- functional-testing analysis:
  - 15 test files use mocks
  - Violation severity: HIGH (more than 10% of tests)

Step 5: Domain Calculation
- (Same as Example 1, based on file categories)

Step 6: Technical Debt Scoring
- Debt Categories:
  1. Test Debt: 15 mock-based tests (HIGH - blocks production confidence)
  2. Code Debt: 34 TODO items (MEDIUM - incomplete features)
  3. Design Debt: 8 FIXME items (MEDIUM - known issues)
  4. Quick Fixes: 3 HACK items (HIGH - brittle code)
  5. Debug Debt: 89 console.log (LOW - clutter only)
  6. Dependency Debt: 12 deprecated APIs (MEDIUM - future breakage)

- Debt Trend (vs 2024-12-01):
  - TODO: ↑11 (48% increase) - WORSENING
  - FIXME: ↑3 (60% increase) - WORSENING
  - HACK: ↑1 (50% increase) - WORSENING
  - Overall: DEBT ACCUMULATING (action needed)

Step 7: Structured Output

---

# Technical Debt Assessment Report

## Executive Summary
Technical debt has INCREASED 52% since December 2024. Primary concerns: 15 mock-based tests
(NO MOCKS violations), 34 TODO items (growing), and 3 HACK workarounds. Immediate action
required on test debt before it blocks releases.

## Debt by Category (Prioritized)

### 🔴 CRITICAL (Fix Immediately)
**1. Mock-Based Tests** (15 files)
- Impact: ⚠️ Integration bugs not caught, production incidents likely
- Evidence: grep 'jest.fn|sinon|mock' found 15 test files
- Trend: Stable (was 15, still 15)
- Effort: 4-5 days
- Action: Migrate to Puppeteer functional tests
- ROI: Prevent 80% of integration bugs (historical Shannon data)

**2. HACK Workarounds** (3 occurrences)
- Impact: ⚠️ Brittle code, high failure risk
- Evidence:
  - src/api/auth.js:45 - "HACK: bypassing validation"
  - src/utils/date.js:89 - "HACK: timezone workaround"
  - src/components/Form.jsx:120 - "HACK: force re-render"
- Trend: ↑1 since December (WORSENING)
- Effort: 2-3 days (depends on complexity)
- Action: Root cause analysis, proper fixes

### 🟡 HIGH (Fix Soon)
**3. TODO Items** (34 occurrences)
- Impact: ⚠️ Incomplete features, user confusion
- Evidence: grep TODO found 34 comments
- Distribution:
  - src/auth: 12 TODOs (authentication incomplete)
  - src/api: 8 TODOs (error handling gaps)
  - src/components: 14 TODOs (UI polish needed)
- Trend: ↑11 since December (+48%) - WORSENING
- Effort: Variable (1-5 days depending on item)
- Action: Prioritize auth TODOs (security-critical)

**4. Deprecated API Usage** (12 occurrences)
- Impact: ⚠️ Future breakage when dependencies updated
- Evidence:
  - React 17 lifecycle methods: 5 components
  - Deprecated npm packages: 4 (lodash, moment.js)
  - Old API endpoints: 3 backend calls
- Trend: New detection (not tracked before)
- Effort: 3-4 days migration
- Action: Update to React 18 patterns, modern libraries

### 🟢 MEDIUM (Fix When Convenient)
**5. FIXME Items** (8 occurrences)
- Impact: Known issues, workarounds in place
- Evidence: grep FIXME found 8 comments
- Examples:
  - "FIXME: performance issue with large lists"
  - "FIXME: error handling not robust"
- Trend: ↑3 since December (WORSENING)
- Effort: 2-3 days
- Action: Address during next refactor sprint

### 🔵 LOW (Nice to Have)
**6. Debug Statements** (89 occurrences)
- Impact: ℹ️ Code clutter, minor performance impact
- Evidence: grep console.log found 89 statements
- Trend: Not tracked previously
- Effort: 1 day (automated cleanup with linter)
- Action: Add ESLint rule to prevent future additions

## Debt Trend Analysis

**Overall Trend**: 📈 WORSENING (52% increase in 5 weeks)

December 2024:
- TODO: 23
- FIXME: 5
- HACK: 2
- Mock tests: 15
- Total: 45 debt items

January 2025 (Today):
- TODO: 34 (+48%)
- FIXME: 8 (+60%)
- HACK: 3 (+50%)
- Mock tests: 15 (stable)
- Total: 60 debt items (+33%)

**Velocity**: +3 debt items per week
**Projection**: 90 items by March 2025 if no action

## Prioritized Action Plan

### Phase 1: Critical Debt (Week 1-2)
**Goal**: Remove production risk

1. **Replace Mock Tests** (5 days)
   - Install Puppeteer MCP
   - Convert 15 test files to functional tests
   - Remove all jest.fn() usage
   - Expected: 80% fewer integration bugs

2. **Fix HACK Workarounds** (3 days)
   - Root cause analysis for each HACK
   - Implement proper solutions
   - Remove brittle code
   - Expected: Eliminate 3 high-risk points

**Phase 1 Outcome**: Production stability restored

### Phase 2: High-Priority Debt (Week 3-4)
**Goal**: Complete incomplete features

3. **Resolve Auth TODOs** (3 days)
   - Complete 12 authentication TODOs
   - Security-critical features
   - Expected: Auth module complete

4. **Migrate Deprecated APIs** (4 days)
   - Update to React 18
   - Replace deprecated packages
   - Expected: Future-proof codebase

**Phase 2 Outcome**: Feature completeness + modern stack

### Phase 3: Medium/Low Debt (Week 5+)
**Goal**: Code quality improvements

5. **Address FIXME Items** (3 days)
6. **Clean Debug Statements** (1 day)

**Phase 3 Outcome**: Clean, maintainable codebase

## Effort Summary
- Critical: 8 days
- High: 7 days
- Medium/Low: 4 days
- **Total**: 19 days (4 work weeks)

## MCP Recommendations
- **puppeteer** (Required): Migrate mock tests to functional tests

## Confidence Score
**92%** (PROCEED threshold)
- Debt patterns are clear from grep evidence
- Historical Serena data shows trends
- Action plan is evidence-based
- High confidence in recommendations

## Next Steps
1. User: Approve Phase 1 plan (critical debt)
2. Install Puppeteer MCP
3. Create wave plan for 3 phases
4. Execute with checkpoints after each phase

---

Step 8: Persist to Serena
- Entity Updated: shannon/analysis/project (existing)
- Stored: New debt counts, trend data, action plan
- Relations: Linked to previous analysis (2024-12-01)
- Tagged: technical-debt, trend-worsening, action-required

Duration: ~90 seconds

Outcome: User receives quantitative debt assessment with clear priorities and actionable plan.

Outputs

Structured analysis object:

{
  "analysis_type": "codebase-quality" | "architecture-review" | "technical-debt" | "complexity-assessment" | "domain-breakdown",
  "project_summary": {
    "total_files": 247,
    "domains": {
      "Frontend": {"percentage": 48.6, "file_count": 120},
      "Backend": {"percentage": 32.4, "file_count": 80},
      "Database": {"percentage": 6.9, "file_count": 17},
      "Testing": {"percentage": 12.1, "file_count": 30}
    },
    "dominant_domain": "Frontend"
  },
  "quantitative_metrics": {
    "complexity_score": 0.68,
    "technical_debt_count": 60,
    "test_quality_score": 0.45,
    "maintainability_score": 0.72
  },
  "findings": {
    "critical": [
      {"issue": "Mock-based tests", "count": 15, "impact": "HIGH"}
    ],
    "high": [
      {"issue": "TODO items", "count": 34, "trend": "+48%"}
    ],
    "medium": [],
    "low": []
  },
  "recommendations": {
    "prioritized": [
      {
        "priority": "HIGH",
        "action": "Replace 15 mock tests with functional tests",
        "effort": "3-5 days",
        "impact": "80% fewer integration bugs",
        "evidence": "grep jest.fn() found 15 files"
      }
    ]
  },
  "mcp_recommendations": {
    "required": [],
    "recommended": ["puppeteer"],
    "conditional": ["context7"]
  },
  "confidence_score": 0.92,
  "historical_context": {
    "previous_analysis": "shannon/analysis/project-2024-12-01",
    "trend": "WORSENING",
    "delta": "+33% technical debt"
  }
}

Success Criteria

This skill succeeds if:

1. ✅ All analysis requests trigger systematic Glob/Grep discovery (no sampling)
2. ✅ Every analysis queries Serena for historical context first
3. ✅ Domain percentages calculated from file counts (not guessed)
4. ✅ Appropriate sub-skills invoked (spec-analysis, project-indexing, confidence-check)
5. ✅ Results are quantitative with evidence (not subjective "looks good")
6. ✅ Recommendations prioritized by impact + effort
7. ✅ MCP recommendations provided based on findings
8. ✅ All results persisted to Serena for future sessions

Failure Modes:

• Agent says "I'll check a few files" → VIOLATION (should use Glob for all files)
• Agent says "Looks complex" → VIOLATION (should invoke spec-analysis for 8D score)
• Agent starts without Serena query → VIOLATION (must check history first)
• Agent provides generic advice → VIOLATION (must include evidence + priorities)

Validation Code:

def validate_shannon_analysis(result):
    """Verify analysis followed Shannon protocols"""

    # Check: Systematic discovery (not sampling)
    assert result.get("discovery_method") in ["glob", "grep"], \
        "VIOLATION: Used sampling instead of systematic discovery"
    assert result.get("files_analyzed") == result.get("total_files"), \
        "VIOLATION: Incomplete analysis (sampling detected)"

    # Check: Serena historical query performed
    assert result.get("historical_context_checked") == True, \
        "VIOLATION: Skipped Serena historical query"

    # Check: Quantitative domain percentages
    domains = result.get("project_summary", {}).get("domains", {})
    assert all(isinstance(d.get("percentage"), (int, float)) for d in domains.values()), \
        "VIOLATION: Domain percentages not calculated (subjective assessment used)"

    # Check: Evidence-based recommendations
    recommendations = result.get("recommendations", {}).get("prioritized", [])
    for rec in recommendations:
        assert "evidence" in rec, \
            f"VIOLATION: Recommendation lacks evidence: {rec.get('action')}"
        assert "effort" in rec, \
            f"VIOLATION: Recommendation lacks effort estimate: {rec.get('action')}"

    # Check: Confidence score present (from confidence-check)
    confidence = result.get("confidence_score")
    assert confidence is not None and 0.0 <= confidence <= 1.0, \
        "VIOLATION: Missing or invalid confidence score"

    # Check: Results persisted to Serena
    assert result.get("serena_entity_id") is not None, \
        "VIOLATION: Results not persisted to Serena"

    return True

Validation

This skill is working correctly if validation function passes. The skill enforces:

• Systematic discovery (no sampling)
• Historical context integration
• Quantitative metrics (not subjective)
• Evidence-based recommendations
• Serena persistence

References

• RED Baseline Testing: shannon-plugin/skills/shannon-analysis/RED_BASELINE_TEST.md (28 violations documented)
• 8D Framework: shannon-plugin/core/SPEC_ANALYSIS.md
• NO MOCKS Philosophy: shannon-plugin/core/TESTING_PHILOSOPHY.md
• Project Indexing: shannon-plugin/skills/project-indexing/SKILL.md
• Confidence Check: shannon-plugin/skills/confidence-check/SKILL.md (validation before proceeding)

Skill Status: General-purpose analysis orchestrator Enforcement Level: High - prevents 28 baseline violations Flexibility: Adapts to analysis type, invokes appropriate sub-skills