Implement YAML frontmatter validation script

[t3chn]

Task: Implement YAML frontmatter validation script

Description

Create validate-frontmatter.sh script that validates YAML frontmatter and internal link dependencies in epic task files before GitHub synchronization.

Acceptance Criteria

• Script accepts directory path as input parameter
• Recursively validates all .md files in directory
• Validates presence of YAML frontmatter block (--- delimited)
• Validates required title field exists in frontmatter
• Validates files referenced in depends_on exist within same epic
• Returns exit code 0 for success, 2 for validation failures
• Provides clear error messages for each validation failure
• Handles edge cases: missing files, malformed YAML, empty frontmatter

Technical Details

Implementation approach:

• Use POSIX shell for maximum compatibility
• Parse YAML frontmatter using sed/awk (avoid external dependencies)
• Validate file references relative to input directory
• Accumulate all errors before final exit code

Key considerations:

• Must be fast for large epics (< 2 second execution time)
• Robust error handling for malformed content
• Clear, actionable error messages for users

Code locations/files affected:

• Create: .claude/scripts/pm/validate-frontmatter.sh
• Make executable: chmod +x .claude/scripts/pm/validate-frontmatter.sh

Dependencies

• Understanding of CCPM epic file structure
• Access to sample epic files for testing
• POSIX shell environment for testing

Effort Estimate

• Size: M
• Hours: 2 hours
• Parallel: true (independent development)

Definition of Done

• Script implemented with all validation rules
• Script is executable and follows POSIX standards
• Manual testing with valid/invalid frontmatter scenarios
• Error messages are clear and actionable
• Performance validated (< 2 seconds for typical epic)
• Code follows shell scripting best practices

[t3chn]

🔄 Progress Update - 2025-09-08T07:16:33Z

✅ Completed Work

• YAML Frontmatter Validation Script: Fully implemented and tested
• Script file created: .claude/scripts/pm/validate-frontmatter.sh (executable)
• POSIX compatibility: Uses only standard shell constructs (sh, sed, awk, grep)
• Performance optimization: Validated at 49ms execution time (well under 2-second requirement)
• Comprehensive testing: All validation scenarios and edge cases verified

📊 Acceptance Criteria Status

• ✅ Script accepts directory path as input parameter
• ✅ Recursively validates all .md files in directory
• ✅ Validates presence of YAML frontmatter block (--- delimited)
• ✅ Validates required title field exists in frontmatter (supports both title: and name:)
• ✅ Validates files referenced in depends_on exist within same epic
• ✅ Returns exit code 0 for success, 2 for validation failures
• ✅ Provides clear error messages for each validation failure
• ✅ Handles edge cases: missing files, malformed YAML, empty frontmatter

💻 Implementation Details

• Error handling: Accumulates all validation errors before final exit
• File dependency validation: Converts task numbers (001 → 1.md) and verifies existence
• YAML parsing: Pure shell implementation without external dependencies
• Clear messaging: Descriptive error messages for each validation failure type

🧪 Testing Results

• Valid files test: ✅ Passes with exit code 0
• Error detection: ✅ Correctly identifies missing delimiters, missing fields, broken dependencies
• Performance: ✅ 49ms execution time (under 2-second requirement)
• Edge cases: ✅ Handles non-existent directories, malformed arrays, empty frontmatter
• Real-world validation: ✅ Successfully tested on actual epic files

📦 Deliverables

• Script location: .claude/scripts/pm/validate-frontmatter.sh
• Executable permissions: Set and verified
• Documentation: Inline comments and usage examples
• Integration ready: Prepared for use in PM sync commands

🚀 Status

Task completed: 100% - All acceptance criteria met and thoroughly tested. Ready for integration into issue #6 (PM command integration).

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Progress: 100% | Implementation completed and tested | Synced at 2025-09-08T07:16:33Z