What

Improve documentation quality across 8 ecosystem projects (common_system,
thread_system, logger_system, container_system, monitoring_system, database_system,
network_system, pacs_system) to enterprise-grade documentation standards.

Why

The 8 ecosystem projects have solid README files and docs/ folders (54-85 files
each) but lack the structural rigor that ensures long-term consistency and
maintainability. Missing elements include standardized metadata, single source of
truth tracking, cross-reference conventions, traceability, and automated quality
validation.

Current Gap Analysis

How

Phase 1: Foundation (P0-P1)

1. Create CLAUDE.md for all 8 projects
2. Standardize README structure across ecosystem
3. Add YAML frontmatter to all docs/ markdown files

Phase 2: Traceability (P1-P2)

4. Create SSOT documentation registry per project
5. Establish ecosystem cross-reference convention
6. Create initial ADRs for all projects
7. Create feature-test-module traceability matrices

Phase 3: Automation (P2-P3)

8. Build ecosystem documentation audit tool
9. Enhance Doxygen inline documentation for public APIs
10. Add documentation audit CI/CD workflow

Scope

In Scope

• Documentation structure, metadata, and tooling applicable to C++ open-source libraries
• Patterns that benefit general-purpose projects: frontmatter, SSOT, cross-references, ADRs, audit tooling

Out of Scope

• Regulatory documents (PRD, SRS, SDS, SVP, VAL)
• Threat model analysis
• UI documentation (screens/, flows/)
• Document format conversion tools (e.g., md2docx)

Sub-Issues

Phase 1: Foundation

• docs: Create CLAUDE.md for all ecosystem projects #560 — docs: Create CLAUDE.md for all ecosystem projects
• docs: Standardize README structure across ecosystem #561 — docs: Standardize README structure across ecosystem
• docs: Add YAML frontmatter to all docs/ markdown files #562 — docs: Add YAML frontmatter to all docs/ markdown files

Phase 2: Traceability

• docs: Create SSOT documentation registry per project #563 — docs: Create SSOT documentation registry per project
• docs: Establish ecosystem cross-reference convention #564 — docs: Establish ecosystem cross-reference convention
• docs: Create initial ADRs for all ecosystem projects #565 — docs: Create initial ADRs for all ecosystem projects
• docs: Create feature-test-module traceability matrices #566 — docs: Create feature-test-module traceability matrices

Phase 3: Automation

• feat: Build ecosystem documentation audit tool #567 — feat: Build ecosystem documentation audit tool
• docs: Enhance Doxygen inline documentation for public APIs #568 — docs: Enhance Doxygen inline documentation for public APIs
• docs(ci): Add documentation audit CI/CD workflow #569 — docs(ci): Add documentation audit CI/CD workflow

Dependency Graph

graph TD
    E[#559 Epic] --> P1_1[#560 CLAUDE.md]
    E --> P1_2[#561 README Standardization]
    E --> P1_3[#562 YAML Frontmatter]

    P1_3 --> P2_1[#563 SSOT Registry]
    P2_1 --> P2_2[#564 Cross-references]
    P1_3 --> P2_3[#565 ADRs]
    P2_1 --> P2_3
    P1_3 --> P2_4[#566 Traceability]
    P2_1 --> P2_4

    P1_3 --> P3_1[#567 Audit Tool]
    P2_1 --> P3_1
    P1_2 --> P3_1
    P3_1 --> P3_3[#569 Audit CI/CD]

    E --> P3_2[#568 Doxygen Docs]