[IMPORTANT] Use TaskCreate to break ALL work into small tasks BEFORE starting — including tasks for each file read. This prevents context loss from long files. For simple tasks, AI MUST ask user whether to skip.

Quick Summary

Goal: Generate comprehensive 26-section business feature documentation with mandatory code evidence for all test cases, plus AI companion file.

Workflow:

1. Detect & Gather — Auto-detect modules from git changes OR user-specified module, read existing docs
2. Investigate Code — Grep/glob codebase to gather evidence (file:line format) for every test case
3. Write Documentation — Follow exact 26-section structure, place in docs/business-features/{Module}/
4. Generate AI Companion — Create .ai.md file (max 300 lines) with domain model, file locations, key expressions
5. Verification — 3-pass system: evidence audit, domain model verification, cross-reference audit

Key Rules:

• EVERY test case MUST have verifiable code evidence (FilePath:LineNumber), no exceptions
• Output must have exactly 26 sections matching the master template
• Always update CHANGELOG.md and Version History (Section 26) when modifying docs
• When writing Section 17 test cases: include an IntegrationTest field pointing to the test file and method name. Format: IntegrationTest: Orders/OrderCommandIntegrationTests.cs::{MethodName}. If no integration test exists yet, set Status: Untested.
• Verify every TC-{MOD}-XXX in Section 17 has a corresponding [Trait("TestSpec", "TC-{MOD}-XXX")] in the integration test codebase. If missing, flag as Status: Untested.
• If third verification pass finds >5 issues, HALT and re-run verification

Be skeptical. Apply critical thinking, sequential thinking. Every claim needs traced proof, confidence percentages (Idea should be more than 80%).

• docs/project-reference/domain-entities-reference.md — Domain entity catalog, relationships, cross-service sync (read when task involves business entities/models) (content auto-injected by hook — check for [Injected: ...] header before reading)

Project Pattern Discovery

Before implementation, search your codebase for project-specific patterns:

• Search for: business-features, detailed-features, feature-docs-template
• Look for: existing feature doc folders, 26-section templates, AI companion files

MANDATORY IMPORTANT MUST Read the feature-docs-reference.md companion doc for project-specific patterns and code examples. If file not found, continue with search-based discovery above.

Feature Documentation Generation & Verification

Generate comprehensive feature documentation following project conventions and folder structure.

GOLD STANDARD References:

Search your codebase for existing feature docs to use as reference:

find docs/business-features -name "README.*.md" -type f | head -5

Template File: docs/templates/detailed-feature-docs-template.md AI Companion Template: docs/templates/feature-docs-ai-template.md

[CRITICAL] MANDATORY CODE EVIDENCE RULE

EVERY test case MUST have verifiable code evidence. This is non-negotiable.

Evidence Format

**Evidence**: `{RelativeFilePath}:{LineNumber}` or `{RelativeFilePath}:{StartLine}-{EndLine}`

Valid vs Invalid Evidence

Output Structure

All documentation MUST be placed in the correct folder structure:

docs/
├── BUSINESS-FEATURES.md              # Master index (UPDATE if new module)
├── templates/
│   └── detailed-feature-docs-template.md  # MASTER TEMPLATE
└── business-features/
    ├── {Module}/                     # One folder per service/module in your project
    │   ├── README.md                 # Complete module documentation
    │   ├── INDEX.md                  # Navigation hub
    │   ├── API-REFERENCE.md          # Endpoint documentation
    │   ├── TROUBLESHOOTING.md        # Issue resolution guide
    │   └── detailed-features/
    │       ├── README.{FeatureName}.md     # Comprehensive (human-facing, 1000+ lines)
    │       └── README.{FeatureName}.ai.md  # AI companion (code-focused, 300-500 lines)
    └── ...

Module Mapping

Search your codebase to discover the module-to-folder mapping:

# Find all service directories
ls -d src/Services/*/

# Find all existing feature doc modules
ls -d docs/business-features/*/

Map each module code to its folder name and service path. Example pattern:

MANDATORY 26-SECTION STRUCTURE

All feature documentation MUST follow this section order:

Stakeholder Quick Navigation

Phase 1: Module Detection & Context Gathering

Step 1.0: Auto-Detect Modules from Git Changes (Default)

When no module or feature is explicitly specified, automatically detect affected modules from git changes:

1. Run git diff --name-only HEAD (captures both staged and unstaged changes)
2. If no uncommitted changes, run git diff --name-only HEAD~1 (last commit)
3. Extract unique module names from changed file paths using the Module Mapping table
4. For each detected module, check if a business feature doc exists in docs/business-features/{Module}/
5. If docs exist → proceed to Phase 1.5 (Update Mode) for each module
6. If no docs exist → skip (do not create docs from scratch without explicit user request)
7. If no service-layer files changed (e.g., only .claude/, docs/, config files) → report "No business feature docs impacted" and exit

Path-to-Module Detection Rules:

Search your codebase to build the path-to-module mapping. Common patterns:

Build a project-specific mapping by examining:

ls -d src/Services/*/
ls -d {frontend-apps-dir}/*/

Step 1.1: Identify Target Module

Determine which module the feature belongs to by:

1. User explicitly specifies module name
2. Feature name/domain implies module (search codebase to verify mapping)
3. Search codebase for feature-related entities/commands
4. Auto-detected from git diff (Step 1.0 above) — used when invoked as a workflow step without explicit module

Step 1.2: Read Existing Documentation

Before creating new docs, read existing structure:

1. Read docs/BUSINESS-FEATURES.md (master index)
2. Read docs/business-features/{Module}/INDEX.md (if exists)
3. Read docs/business-features/{Module}/README.md (if exists)
4. Identify what already exists vs what needs creation/update

Step 1.3: Codebase Analysis

Gather evidence from source code:

• Entities: src/Services/{Module}/{Module}.Domain/Entities/
• Commands: src/Services/{Module}/{Module}.Application/UseCaseCommands/
• Queries: src/Services/{Module}/{Module}.Application/UseCaseQueries/
• Controllers: src/Services/{Module}/{Module}.Service/Controllers/
• Frontend: {frontend-apps-dir}/{app-name}/ or {frontend-libs-dir}/{domain-lib}/

Step 1.4: Feature Analysis

Build knowledge model in .ai/workspace/analysis/[feature-name].md.

Discovery Areas

1. Domain Entity Discovery: Entities, value objects, enums
2. Workflow Discovery: Commands, Queries, Event Handlers, Background Jobs
3. API Discovery: Controllers, endpoints, DTOs
4. Frontend Discovery: Components, Services, Stores
5. Cross-Service Discovery: Message Bus messages, producers, consumers

Phase 1.5: Update Mode (when updating existing docs)

When UPDATING an existing business feature document (not creating from scratch):

Step 1.5.1: Diff Analysis

1. Identify the source of changes (git diff, branch comparison, commit history)
2. Categorize changes by type: backend entity, command, query, frontend component, i18n, etc.
3. Map each change to impacted documentation sections (use table below)

Step 1.5.2: Section Impact Mapping

Step 1.5.3: Mandatory Test Coverage (Sections 17-20)

CRITICAL: When documenting ANY new functionality, you MUST update:

• Section 17 (Test Specifications): Add test cases (TC-{MOD}-XXX) for new features with GIVEN/WHEN/THEN format. Each TC entry should include:

  markdownCopy

  #### TC-GM-001: Create SMART Goal Successfully
  
  **Priority**: P0-Critical
  **Status**: Tested | Untested
  **IntegrationTest**: `Orders/OrderCommandIntegrationTests.cs::SaveOrder_WhenValidData_ShouldCreateSuccessfully`
  **Evidence**: `{Service}.Application/{Feature}/Commands/Save{Feature}Command.cs:42-68`
  

• Section 18 (Test Data): Add seed data required for new test cases

• Section 19 (Edge Cases): Add edge cases for boundary conditions, error states, permission checks

• Section 20 (Regression Impact): Add regression risk rows for impacted areas, update test suite counts

Failure to update test sections is a blocking quality issue.

Step 1.5.4: CHANGELOG Entry

Always create/update CHANGELOG.md entry under [Unreleased] following Keep a Changelog format.

Phase 2: Documentation Generation

Generate at docs/business-features/{Module}/detailed-features/README.{FeatureName}.md.

Key Format Examples

Business Requirements (FR-XX):

#### FR-{MOD}-01: {Requirement Title}

| Aspect          | Details                           |
| --------------- | --------------------------------- |
| **Description** | {What this requirement enables}   |
| **Scope**       | {Who can use / affected entities} |
| **Evidence**    | `{FilePath}:{LineRange}`          |

User Stories (US-XX):

#### US-{MOD}-01: {Story Title}

**As a** {role}
**I want** {goal/desire}
**So that** {benefit/value}

**Acceptance Criteria**:

- [ ] AC-01: {Criterion with evidence reference}
- [ ] AC-02: {Criterion with evidence reference}

**Related Requirements**: FR-{MOD}-01, FR-{MOD}-02
**Evidence**: `{FilePath}:{LineRange}`

Test Summary Table (MANDATORY):

| Category    | P0 (Critical) | P1 (High) | P2 (Medium) | P3 (Low) |  Total  |
| ----------- | :-----------: | :-------: | :---------: | :------: | :-----: |
| {Category1} |      {N}      |    {N}    |     {N}     |   {N}    |   {N}   |
| **Total**   |    **{N}**    |  **{N}**  |   **{N}**   | **{N}**  | **{N}** |

Test Case Format (TC-XX):

#### TC-{MOD}-001: {Test Name} [P0]

**Acceptance Criteria**:

- {Passing criteria 1}
- {Passing criteria 2}

**GIVEN** {initial context}
**WHEN** {action performed}
**THEN** {expected outcome}

**Edge Cases**:

- {Invalid scenario} → {Expected error/behavior}

**Evidence**: `{FilePath}:{LineRange}`

Troubleshooting Format:

#### {Issue Title}

**Symptoms**: {Observable problem}

**Causes**:

1. {Cause 1}
2. {Cause 2}

**Resolution**:

- {Step 1}
- {Step 2}

Permission Matrix:

| Role  | View | Create | Edit | Delete | Special     |
| ----- | :--: | :----: | :--: | :----: | ----------- |
| Admin |  ✅  |   ✅   |  ✅  |   ✅   | Full access |

Phase 2.5: AI Companion Generation

Generate AI-agent optimized companion file alongside the comprehensive documentation.

Output: docs/business-features/{Module}/detailed-features/README.{FeatureName}.ai.md Template: docs/templates/detailed-feature-docs-template.ai.md

AI Companion Structure (10 Sections, ~260 lines)

Compression Rules

1. Tables over prose - Convert paragraphs to table rows
2. Paths over descriptions - File:Line over "located in..."
3. Signatures over examples - { id: string } → { entity: Dto } over full code
4. Decisions over explanations - What to do, not why

AI Companion Extended (6-Section Variant, ~420 lines)

For larger features, use the extended companion format:

1. Quick Reference (~40 lines) - Module, service, file locations
2. Domain Model (~80 lines) - Entities, enums, value objects (condensed)
3. API Contracts (~100 lines) - Signatures with DTOs only
4. Validation Rules (~80 lines) - BR-XX table format
5. Service Boundaries (~60 lines) - Cross-service integration
6. Critical Paths (~60 lines) - Key workflows as decision trees

AI Companion Header

# {FeatureName} Feature - AI Context

> AI-optimized context file for code generation tasks.
> Full documentation: [README.{FeatureName}Feature.md](./README.{FeatureName}Feature.md)
> Last synced: {YYYY-MM-DD}

Skip These Sections in AI Companion

• Troubleshooting (operational)
• Operational Runbook (DevOps)
• Business Value (stakeholder)
• Version History (changelog)
• Glossary (definitions)

AI Companion Quality Check

• File size ≤300 lines (standard) or ≤500 lines (extended)
• All file paths are exact and current
• API contracts include request/response shapes
• Business rules have evidence references
• Patterns section has required/anti-pattern markers
• Evidence chain preserved from full doc
• Links back to comprehensive doc
• 'Last synced' timestamp included

Phase 3: Master Index Update

After creating/updating module docs, update docs/BUSINESS-FEATURES.md:

1. Read current content
2. Verify module is listed in the "Detailed Module Documentation" table
3. Add link if missing:
   markdownCopy

   | **{Module}** | [Description] | [View Details](./business-features/{Module}/README.md) |
   

Anti-Hallucination Protocols

Evidence-Based Reasoning — Speculation is FORBIDDEN. Every claim needs file:line proof. Confidence: >95% recommend freely, 80-94% with caveats, <80% DO NOT recommend — gather more evidence. Cross-service validation required for architectural changes. MUST READ .claude/skills/shared/evidence-based-reasoning-protocol.md for full protocol and checklists.

DOCUMENTATION_ACCURACY_CHECKPOINT

Before writing any documentation:

• "Have I read the actual code that implements this?"
• "Are my line number references accurate and current?"
• "Can I provide a code snippet as evidence?"

TEST CASE EVIDENCE VERIFICATION

For EVERY test case:

1. Read the Evidence file at claimed line number
2. Verify: Does code at that line support test assertion?
3. Check Edge Cases: Find error constants in ErrorMessage.cs
4. Fix immediately if line numbers wrong

Phase 3.5: Verification (3 Passes)

First Pass - Test Case Evidence Audit

For EVERY test case in documentation:

1. Read the Evidence file at the claimed line number
2. Verify match: Does the code at that line support the test assertion?
3. Check Edge Cases: Find error message constants in ErrorMessage.cs
4. Fix immediately if line numbers are wrong

Second Pass - Domain Model Verification

• Read EACH entity file referenced in Domain Model section
• Verify property names, types, and line numbers
• Check enum values exist in actual source
• Remove any documented properties not found in source

Third Pass - Cross-Reference Audit

• Test Summary counts match actual test case count
• All internal links work
• No template placeholders remain ({FilePath}, {LineRange})
• ErrorMessage.cs constants match edge case messages

CRITICAL: If ANY pass finds hallucinated content, re-investigate and fix before completing.

Quality Checklist

Structure

• Documentation placed in correct folder structure
• README.md follows template format (26 sections)
• INDEX.md created with navigation links
• Master index (BUSINESS-FEATURES.md) updated
• Stakeholder navigation table present
• ASCII diagrams for architecture
• API endpoints documented with examples
• CHANGELOG.md updated with entry under [Unreleased]

Test Case Evidence (MANDATORY)

• EVERY test case has Evidence field with file:line format
• No template placeholders remain ({FilePath}, {LineRange})
• Line numbers verified by reading actual source files
• Edge case errors match constants from ErrorMessage.cs
• Test Summary counts match actual number of test cases

Anti-Hallucination

• All entity properties verified against source code
• All enum values verified against actual enum definitions
• No invented methods, properties, or models
• All code snippets copied from actual files

Related

• documentation
• feature-implementation

Closing Reminders

• MUST break work into small todo tasks using TaskCreate BEFORE starting
• MUST search codebase for 3+ similar patterns before creating new code
• MUST cite file:line evidence for every claim (confidence >80% to act)
• MUST add a final review todo task to verify work quality MANDATORY IMPORTANT MUST READ the following files before starting:
• MUST READ .claude/skills/shared/evidence-based-reasoning-protocol.md before starting