ln-112-project-core-creator

name	ln-112-project-core-creator
description	Creates 4 core project docs (requirements.md, architecture.md, tech_stack.md, patterns_catalog.md). ALWAYS created.
license	MIT

Paths: File paths (shared/, references/, ../ln-*) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root.

Project Core Documentation Creator

L3 Worker that creates 4 core project documentation files. These are ALWAYS created regardless of project type.

Purpose & Scope

• Creates 4 core project documentation files (required for all projects)
• Receives Context Store from ln-110-project-docs-coordinator
• Heavy use of auto-discovery (architecture needs full project scan)
• Replaces placeholders with project-specific data
• Self-validates structure and content (16+ questions)
• Never gathers context itself; uses coordinator input

Invocation (who/when)

• ln-110-project-docs-coordinator: ALWAYS invoked as second worker (after ln-111)
• Never called directly by users

Inputs

From coordinator:

• contextStore: Full Context Store with all discovered data
  • PROJECT_NAME, PROJECT_DESCRIPTION
  • TECH_STACK (full object: frontend, backend, database, etc.)
  • DEPENDENCIES (from package.json)
  • SRC_STRUCTURE (folder analysis)
  • EXTERNAL_SYSTEMS (from .env.example)
  • CODE_CONVENTIONS (from eslint, prettier)
  • ADR_LIST (from docs/reference/adrs/)
  • LEGACY_CONTENT (optional, from ln-100 Phase 0 migration):
    • legacy_architecture: { layers[], components[], diagrams[], data_flow }
    • legacy_requirements: { functional[], non_functional[], user_stories[] }
    • legacy_tech_stack: { frontend, backend, database, versions }
• targetDir: Project root directory

LEGACY_CONTENT is used as base content when creating documents. Priority: Legacy > Auto-discovery > Template defaults.

Documents Created (4)

File	Target Sections	Questions	Auto-Discovery
docs/project/requirements.md	Functional Requirements (FR-XXX-NNN format)	Q23	Low
docs/project/architecture.md	11 arc42 sections with C4 diagrams	Q24-Q34	High
docs/project/tech_stack.md	Frontend, Backend, Database, Additional	Q35-Q38	High
docs/architecture/patterns_catalog.md	Pattern summary, 4-score model, trend tracking	—	High

Workflow

Phase 1: Receive Context

1. Parse full Context Store from coordinator
2. Validate required keys (PROJECT_NAME, TECH_STACK)
3. Extract architecture-specific data (SRC_STRUCTURE, DEPENDENCIES)

Phase 2: Create Documents

For each document (requirements.md, architecture.md, tech_stack.md, patterns_catalog.md):

1. Check if file exists (idempotent)
2. If exists: skip with log
3. If not exists:
   • Copy template from references/templates/
   • Check LEGACY_CONTENT for this document type:
     • For architecture.md: If LEGACY_CONTENT.legacy_architecture exists:
       • Use legacy_architecture.layers[] for "## Building Block View" (Section 5)
       • Use legacy_architecture.components[] for component descriptions
       • Use legacy_architecture.diagrams[] for existing diagrams (preserve mermaid/images)
       • Use legacy_architecture.data_flow for "## Runtime View" (Section 6)
       • Merge with auto-discovered SRC_STRUCTURE (legacy takes priority)
       • Mark: <!-- Migrated from legacy documentation --> at top of merged sections
     • For requirements.md: If LEGACY_CONTENT.legacy_requirements exists:
       • Use legacy_requirements.functional[] as base for FR-XXX requirements
       • Use legacy_requirements.user_stories[] if FR format not found
       • Augment with template structure (add MoSCoW labels if missing)
     • For tech_stack.md: If LEGACY_CONTENT.legacy_tech_stack exists:
       • Use legacy_tech_stack.versions as base for technology versions
       • Merge with auto-discovered TECH_STACK (legacy versions take priority)
       • Use legacy_tech_stack.rationale for decision explanations
     • For patterns_catalog.md:
       • Copy template from shared/templates/patterns_template.md
       • Auto-detect patterns in codebase:
         • Grep("Queue|Worker|Job|Bull") → Job Processing
         • Grep("EventEmitter|publish|subscribe") → Event-Driven
         • Grep("Cache|Redis|Memcached") → Caching
         • Grep("CircuitBreaker|Retry") → Resilience
       • Add detected patterns as "Status: Detected" (not yet audited)
       • Link to existing ADRs if pattern names match
       • Mark: <!-- Auto-detected by ln-112, audit with ln-640 -->
   • Replace {{PLACEHOLDER}} with Context Store values
   • Generate C4 diagrams from SRC_STRUCTURE (for architecture.md, if no legacy diagrams)
   • Insert ADR links (for architecture.md Section 8)
   • Mark [TBD: X] for missing data

Phase 3: Self-Validate

For each created document:

1. Check SCOPE tag in first 10 lines
2. Check required sections (from questions_core.md)
3. Validate specific format requirements:
   • requirements.md: FR-XXX identifiers, MoSCoW labels
   • architecture.md: 11 sections, C4 diagrams, ADR references
   • tech_stack.md: versions, rationale for each technology
4. Check Maintenance section
5. Auto-fix issues where possible

Phase 4: Return Status

Return to coordinator:

{
  "created": ["docs/project/requirements.md", ...],
  "skipped": [],
  "tbd_count": 5,
  "validation": "OK",
  "diagrams_generated": 3
}

Critical Notes

• Idempotent: Never overwrite existing files
• Heavy auto-discovery: architecture.md requires deep project analysis
• C4 diagrams: Generated from SRC_STRUCTURE in Mermaid format
• ADR integration: Section 8 links to docs/reference/adrs/
• arc42 compliance: ISO/IEC/IEEE 42010:2022 structure
• TBD markers: Use [TBD: X] for missing data

NO_CODE_EXAMPLES Rule (MANDATORY)

Documents describe contracts and decisions, NOT implementations:

• FORBIDDEN: Code blocks > 5 lines, function implementations, imports, DI configuration
• ALLOWED: Mermaid diagrams, component tables, method signatures (1 line), ADR links
• INSTEAD OF CODE: Reference source: "See src/Services/UserService.cs:45"
• TEMPLATE RULE: All templates include <!-- NO_CODE_EXAMPLES: ... --> tag - FOLLOW IT

Stack Adaptation Rule (MANDATORY)

• Links must reference stack-appropriate docs (Microsoft for .NET, MDN for JS)
• Never mix stack references (no Python examples in .NET project)

Format Priority (MANDATORY)

Tables > Mermaid/ASCII diagrams > Lists > Text

Definition of Done

• Context Store received and validated
• 4 core documents created (or skipped if exist)
• C4 diagrams generated (Context, Container, Component)
• ADR links populated
• Patterns auto-detected and added to catalog
• Self-validation passed (SCOPE, sections, format)
• Actuality verified: all document facts match current code (paths, functions, APIs, configs exist and are accurate)
• Status returned to coordinator

Reference Files

• Templates: references/templates/requirements_template.md, architecture_template.md, tech_stack_template.md
• Patterns template: shared/templates/patterns_template.md
• Questions: references/questions_core.md (Q23-Q38)

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Version: 2.2.0 Last Updated: 2025-01-12