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Analyze story dependencies, detect issues, and generate visual dependency graphs
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You are a story dependency specialist. You analyze relationships between stories, detect circular dependencies, identify blocking chains, find bottlenecks, and generate visual dependency graphs.
Provide comprehensive dependency analysis for user stories:
This skill is activated when users need dependency analysis:
Goal: Load all story YAML files and extract dependency information.
Find Story Files:
find stories/yaml-source -name "US-*.yaml" | sort
Parse Dependencies from each story:
dependencies:
blocked_by: [US-0001, US-0003] # This story needs these first
blocks: [US-0010, US-0015] # This story blocks these
related_to: [US-0008] # This story is related (not blocking)
Build Story Inventory:
Found 25 stories:
- 18 in backlog
- 5 in progress
- 2 done
Goal: Create directed graph of dependencies.
Run Dependency Analysis Script:
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --output-json
Parse Graph Structure:
{
"nodes": ["US-0001", "US-0002", "US-0003", ...],
"edges": [
{"from": "US-0001", "to": "US-0002", "type": "blocks"},
{"from": "US-0001", "to": "US-0003", "type": "blocks"},
...
],
"statistics": {
"total_stories": 25,
"total_dependencies": 32,
"avg_dependencies_per_story": 1.28
}
}
Understand Graph Semantics:
Goal: Find dependency cycles (deadlocks).
Analysis:
Run Cycle Detection:
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --check-cycles
Identify Cycles:
Cycle 1: US-0005 → US-0008 → US-0010 → US-0005
Cycle 2: US-0012 → US-0015 → US-0012
Present Results:
⚠️ Circular Dependencies Detected
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**Found**: 2 circular dependency chains
**Impact**: 5 stories affected (deadlock situation)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔄 Cycle 1 (3 stories)
US-0005: Advanced search functionality
↓ blocks
US-0008: Search result filtering
↓ blocks
US-0010: Filter persistence
↓ blocks
US-0005: Advanced search functionality (CYCLE!)
**Problem**: These stories form a circular dependency chain
**Impact**: None of these stories can be started
**Priority**: HIGH - Blocks 3 stories
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔄 Cycle 2 (2 stories)
US-0012: Export search results
↓ blocks
US-0015: Scheduled exports
↓ blocks
US-0012: Export search results (CYCLE!)
**Problem**: Mutual blocking dependency
**Impact**: Neither story can be started
**Priority**: MEDIUM - Blocks 2 stories
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 Suggested Fixes
**For Cycle 1**:
Option A: Break US-0010 → US-0005 dependency
- Make filter persistence work without advanced search
- Use basic search as foundation
Option B: Merge stories
- Combine US-0005, US-0008, US-0010 into one larger story
- Or extract common foundation into US-0004b
**For Cycle 2**:
Option A: Remove US-0015 → US-0012 dependency
- Scheduled exports can work with basic export
- US-0012 adds advanced features later
Option B: Reverse dependency
- US-0012 depends on US-0015 (not mutual)
- Build scheduler first, then export formats
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠️ Action Required
These cycles must be resolved before sprint planning.
Circular dependencies create deadlock situations where
no story in the cycle can be started.
Would you like me to:
1. Show detailed story context for each cycle
2. Help update dependencies to break the cycles
3. Generate visual diagram of the cycles
Goal: Identify long sequences of dependent stories.
Analysis:
Run Chain Detection:
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --check-chains --max-length 5
Identify Long Chains:
Chain 1: US-0001 → US-0002 → US-0003 → US-0004 → US-0006 → US-0009
(6 stories in sequence)
Chain 2: US-0001 → US-0007 → US-0011 → US-0013 → US-0018
(5 stories in sequence)
Present Results:
⚠️ Long Blocking Chains Detected
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**Found**: 2 chains longer than 5 stories
**Impact**: Creates bottlenecks and delays
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔗 Chain 1: Critical Path (6 stories, 26 story points)
US-0001: Display key metrics (5pts) - 2-3 days
↓
US-0002: Filter by date range (3pts) - 1-2 days
↓
US-0003: Export to PDF (3pts) - 1 day
↓
US-0004: Mobile layout (5pts) - 2 days
↓
US-0006: Real-time updates (8pts) - 4-5 days
↓
US-0009: Custom dashboards (3pts) - 1-2 days
**Total Sequential Time**: 11-15 days minimum
**Risk**: Delays in any story cascade to all following stories
**Parallel Work**: None - all must be sequential
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔗 Chain 2: Secondary Path (5 stories, 19 story points)
US-0001: Display key metrics (5pts) - 2-3 days
↓
US-0007: Profile editing (3pts) - 1-2 days
↓
US-0011: Activity log (5pts) - 2-3 days
↓
US-0013: Notification system (5pts) - 2-3 days
↓
US-0018: Email digest (3pts) - 1 day
**Total Sequential Time**: 8-12 days minimum
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 Suggested Optimizations
**Chain 1**:
1. Consider if US-0004 truly needs US-0003
- Mobile layout probably doesn't depend on PDF export
- Could work in parallel with US-0003
2. US-0006 (Real-time updates) is a bottleneck (8pts)
- Consider splitting into smaller stories
- Or make optional/phased implementation
3. US-0009 (Custom dashboards) may be independent
- Review if it really needs real-time updates
- Could be developed with static data first
**Chain 2**:
1. US-0013 (Notifications) could be more independent
- May not need full activity log
- Could use basic event tracking first
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💡 Parallelization Opportunities
If you break some dependencies, could enable:
- 3 parallel work streams instead of 2 sequential
- Reduce critical path from 15 days to 8 days
- Increase team throughput by ~40%
Would you like me to suggest specific dependency changes?
Goal: Identify stories that can start immediately.
Analysis:
Find Root Nodes (no blocked_by dependencies):
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --find-independent
Present Ready-to-Start Stories:
✅ Independent Stories (Can Start Immediately)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**Found**: 6 stories with no dependencies
**Total Points**: 23 (enough for ~half a sprint)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📋 Ready for Development
1. US-0001: Display key metrics (5pts)
Status: backlog
Priority: high
Complexity: medium
→ Blocks 8 other stories (start this first!)
2. US-0014: User profile page (3pts)
Status: backlog
Priority: medium
Complexity: low
→ Blocks 2 other stories
3. US-0017: Help documentation (2pts)
Status: backlog
Priority: low
Complexity: trivial
→ Blocks nothing (can do anytime)
4. US-0020: Terms of service page (1pt)
Status: backlog
Priority: low
Complexity: trivial
→ Blocks nothing
5. US-0022: Logo upload (3pts)
Status: backlog
Priority: medium
Complexity: low
→ Blocks 1 other story
6. US-0025: Color theme picker (3pts)
Status: backlog
Priority: low
Complexity: low
→ Blocks nothing
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💡 Recommendations
**Start with**: US-0001 (blocks many others - critical path)
**Parallel work**:
- Team 1: US-0001 (5pts) + US-0014 (3pts) = 8pts
- Team 2: US-0022 (3pts) + US-0025 (3pts) = 6pts
- Team 3: US-0017 (2pts) + US-0020 (1pt) = 3pts
This enables maximum parallel progress while unblocking
future stories as quickly as possible.
Goal: Find stories that block many others.
Analysis:
Find High-Degree Nodes:
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --find-bottlenecks --threshold 3
Present Bottleneck Stories:
⚠️ Bottleneck Stories Detected
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**Found**: 3 stories that block ≥3 others
**Impact**: Delays in these stories affect many others
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🚧 Critical Bottlenecks
1. US-0001: Display key metrics
**Blocks**: 8 stories
**Points**: 5
**Status**: backlog
**Priority**: HIGH - Start immediately!
Blocked stories:
- US-0002: Filter by date (3pts)
- US-0003: Export PDF (3pts)
- US-0004: Mobile layout (5pts)
- US-0006: Real-time updates (8pts)
- US-0007: Profile editing (3pts)
- US-0009: Custom dashboards (3pts)
- US-0011: Activity log (5pts)
- US-0023: Metric alerts (5pts)
**Total Blocked Points**: 35 (almost full sprint!)
2. US-0014: User profile page
**Blocks**: 5 stories
**Points**: 3
**Status**: backlog
**Priority**: HIGH
Blocked stories:
- US-0015: Edit profile (2pts)
- US-0016: Upload avatar (3pts)
- US-0019: Privacy settings (3pts)
- US-0021: Account deletion (5pts)
- US-0024: Profile sharing (3pts)
**Total Blocked Points**: 16
3. US-0010: Authentication system
**Blocks**: 4 stories
**Points**: 8
**Status**: in_progress ✅
**Priority**: HIGH - Monitor progress
Blocked stories:
- US-0011: Activity log (5pts)
- US-0013: Notifications (5pts)
- US-0018: Email digest (3pts)
- US-0022: API access (5pts)
**Total Blocked Points**: 18
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📊 Impact Analysis
**Total Stories Blocked**: 17 (68% of backlog)
**Total Points Blocked**: 69 (144% of average sprint capacity)
**Risk**: Delays in US-0001 cascade to 8 other stories
**Recommendation**: Prioritize bottleneck stories for earliest completion
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 Mitigation Strategies
**US-0001 (Blocks 8)**:
1. Assign to most experienced developer
2. Review dependencies - are all 8 truly blocked?
3. Consider extracting shared foundation to unblock others sooner
4. Add extra testing/review to avoid rework
**US-0014 (Blocks 5)**:
1. Start immediately after US-0001 begins
2. Can work in parallel with US-0001
3. Profile stories are all low-medium complexity
**US-0010 (In Progress)**:
1. Monitor daily progress
2. Ensure no blockers for this story
3. 4 stories waiting - communicate timeline
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💡 Dependency Reduction Ideas
Consider if these dependencies are truly required:
- Does US-0007 (Profile editing) need US-0001 (Metrics)?
- Does US-0023 (Metric alerts) need full US-0001, or just API?
- Can any blocked stories use mock/partial data?
Reducing unnecessary dependencies could unblock 2-3 stories.
Goal: Create visual Mermaid diagram.
Analysis:
Generate Diagram:
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --output-diagram deps.mmd
Read Mermaid File:
graph TD
US0001[US-0001: Display key metrics<br/>5pts - HIGH]
US0002[US-0002: Filter by date<br/>3pts - MEDIUM]
US0003[US-0003: Export PDF<br/>3pts - MEDIUM]
US0004[US-0004: Mobile layout<br/>5pts - MEDIUM]
US0001 --> US0002
US0001 --> US0003
US0001 --> US0004
US0002 --> US0006
US0003 --> US0006
classDef bottleneck fill:#ff6b6b
classDef independent fill:#51cf66
classDef blocked fill:#ffd43b
class US0001 bottleneck
class US0002,US0003,US0004 blocked
Present Diagram:
📊 Dependency Graph Generated
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**File**: stories/analysis/dependency-graph.mmd
**Stories**: 25
**Dependencies**: 32
**Layers**: 6 (max dependency depth)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎨 Color Legend
🔴 Red (Bottleneck): Blocks ≥3 stories
🟢 Green (Independent): No dependencies, can start now
🟡 Yellow (Blocked): Waiting on other stories
⚪ White (Normal): Standard dependency
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📈 Graph Statistics
**Independent stories**: 6 (can start immediately)
**Bottleneck stories**: 3 (block ≥3 others)
**Longest chain**: 6 stories (US-0001 → US-0009)
**Average dependencies**: 1.3 per story
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💡 How to View
Option 1: GitHub/GitLab
- Push the .mmd file to your repo
- View directly in PR or file browser
Option 2: Mermaid Live Editor
- Visit: https://mermaid.live
- Paste contents of dependency-graph.mmd
Option 3: VS Code
- Install "Markdown Preview Mermaid Support" extension
- Open .mmd file and preview
Option 4: Embed in documentation
- Copy .mmd contents into markdown file
- Surround with ```mermaid code fence
Goal: Recommend ways to improve dependency structure.
Analysis:
💡 Dependency Optimization Recommendations
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
**Goal**: Reduce blocking, enable parallel work
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎯 High-Impact Changes
1. **Break US-0004 → US-0003 dependency**
Current: Mobile layout depends on PDF export
Suggested: Remove this dependency (likely unnecessary)
Impact: Enables 1 story to work in parallel (+5 pts capacity)
2. **Split US-0001 into foundation + enhancements**
Current: US-0001 blocks 8 stories (major bottleneck)
Suggested:
- US-0001a: Basic metrics display (3pts)
- US-0001b: Advanced metrics features (2pts)
Impact: Unblocks 5 stories earlier (saves ~3-5 days)
3. **Remove US-0007 → US-0001 dependency**
Current: Profile editing depends on metrics dashboard
Suggested: These seem unrelated - verify if truly needed
Impact: Enables parallel development (+3 pts capacity)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 Medium-Impact Changes
4. **Merge US-0012 ↔ US-0015 (circular dependency)**
Current: Mutual blocking (deadlock)
Suggested: Merge into single story or reverse dependency
Impact: Resolves deadlock, enables 2 stories
5. **Add parallel paths from US-0001**
Current: All work flows through single bottleneck
Suggested: Identify stories that could use mock data initially
Impact: Could enable 2-3 stories to start earlier
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📊 Projected Impact
**Before optimizations**:
- Parallel capacity: ~15 story points
- Critical path: 15 days
- Stories ready to start: 6
**After optimizations**:
- Parallel capacity: ~28 story points (+87%)
- Critical path: 8-9 days (-40%)
- Stories ready to start: 11 (+83%)
**Result**: ~50% faster feature delivery with same team size
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Would you like me to:
1. Show detailed analysis for specific dependencies
2. Help update story YAMLs to implement these changes
3. Generate new dependency graph showing optimized structure
Comprehensive analysis output:
📊 Dependency Analysis Report
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Generated: 2025-01-03 15:30:00
Stories Analyzed: 25
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📈 Overall Statistics
Total Stories: 25
Total Dependencies: 32
Average Dependencies per Story: 1.28
Max Dependency Depth: 6 levels
Status Breakdown:
- Backlog: 18 stories (72%)
- In Progress: 5 stories (20%)
- Done: 2 stories (8%)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ Independent Stories: 6
Ready to start immediately (no blockers)
Total points available: 23
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🚧 Bottleneck Stories: 3
Stories blocking ≥3 others
Total downstream impact: 69 story points
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔗 Longest Chains: 2
Max chain length: 6 stories
Critical path: 15 days minimum
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠️ Issues Detected: 2
Circular Dependencies: 2 cycles (5 stories affected)
Long Chains: 2 chains (>5 stories each)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📊 Dependency Health Score: 72/100
Breakdown:
- No circular deps: 0/25 (critical issue)
- Reasonable chain length: 15/25 (2 long chains)
- Balanced dependencies: 20/25 (3 bottlenecks)
- Independent stories: 12/25 (good)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💡 Key Recommendations
1. CRITICAL: Resolve 2 circular dependencies (blocks 5 stories)
2. HIGH: Address bottleneck stories (especially US-0001)
3. MEDIUM: Review long chains for optimization opportunities
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📁 Files Generated
- stories/analysis/dependency-graph.mmd (visual diagram)
- stories/analysis/dependency-report.json (full data)
- stories/analysis/independent-stories.txt (ready to start)
- stories/analysis/bottlenecks.txt (high-priority stories)
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# Full analysis with JSON output
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --output-json
# Generate Mermaid diagram
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --output-diagram deps.mmd
# Find specific issues
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --check-cycles
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --check-chains --max-length 5
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --find-independent
python3 .claude/skills/dependency-analyzer/scripts/check_dependencies.py --find-bottlenecks --threshold 3
⚠️ No stories found
Directory: stories/yaml-source/
Files found: 0
This usually means:
- No stories have been created yet
- Stories are in a different directory
- File permissions prevent reading
Create stories first using user-story-generator skill.
⚠️ Invalid dependency detected
In story: US-0005
References: US-9999 (does not exist)
This story references a non-existent story.
Fix options:
1. Remove the invalid dependency
2. Create US-9999 if it should exist
3. Correct the story ID (typo?)
Would you like me to show US-0005 details?
⚠️ Conflicting dependencies
US-0005:
dependencies:
blocked_by: [US-0008]
US-0008:
dependencies:
blocks: [US-0010] # Does not list US-0005
Inconsistency: US-0005 says it's blocked by US-0008,
but US-0008 doesn't list US-0005 in its "blocks" field.
Recommendation: Dependencies should be bidirectional for consistency.
Auto-fix: Add US-0005 to US-0008's "blocks" array? (yes/no)
Uses settings from .claude/skills/user-story-generator/config/automation-config.yaml:
dependencies:
check_circular: true
max_depth: 10 # Warn if dependency chain exceeds this
warn_on_long_chains: true
max_chain_length: 5 # Chains longer than this trigger warning
bottleneck_threshold: 3 # Stories blocking ≥ this many are bottlenecks
Input: "Check dependencies"
Output:
📊 Quick Dependency Check
Stories: 25
Dependencies: 32
Independent: 6 ✅
Bottlenecks: 3 ⚠️
Circular: 0 ✅
Long chains: 2 ⚠️
Overall: Generally healthy with some optimizations possible
Input: "Analyze dependencies for sprint planning"
Output:
[Full analysis with all sections]
Sprint Planning Recommendations:
- 6 stories can start immediately (23 pts)
- Prioritize US-0001 (blocks 8 others)
- Resolve circular dependency before sprint
- Plan for 2-3 parallel work streams
まだレビューはありません。使ってみた感想をお寄せください。
概要と使いどころ
Validate WCAG 2.1 Level AA compliance and accessibility best practices. Use when performing accessibility audits and WCAG certification.
日本語の概要は準備中です。原文の説明を表示しています。
Analyze feature requirements, dependencies, and security considerations. Use when starting feature implementation from GitHub issues to understand scope, technical feasibility, and risks.
日本語の概要は準備中です。原文の説明を表示しています。
Run SQL queries against psql, BigQuery, or MySQL from the terminal, including natural-language-to-SQL and schema exploration. Use when analyzing data, inspecting DB state, or debugging tables. Trigger on "query the database", "SQL", "show me data from", "explore table".
日本語の概要は準備中です。原文の説明を表示しています。
Design REST APIs or function contracts with clear request/response specifications, error handling patterns, authentication strategies, and comprehensive documentation.
日本語の概要は準備中です。原文の説明を表示しています。
Generate comprehensive API endpoint tests for REST and GraphQL APIs. Creates tests for all HTTP methods, status codes, authentication, and validation.
日本語の概要は準備中です。原文の説明を表示しています。
Design component architecture and module structure using established architectural patterns for clean, maintainable, and scalable systems.
日本語の概要は準備中です。原文の説明を表示しています。