# Epic 2: API Implementation Validation & Completion - Stories Index

**Epic File:** [../epic-2-api-implementation-validation.md](../epic-2-api-implementation-validation.md)

**Goal:** Achieve 100% implementation coverage and validation of all documented n8n REST API methods (24 total)

---

## Stories Overview

### ✅ Phase 1: Validation of Existing Implementation (Stories 2.1-2.3)

#### Story 2.1: Validate & Test Workflows API (8 methods)
**File:** [2.1.validate-workflows-api.md](./2.1.validate-workflows-api.md)
**Status:** Draft
**Complexity:** Medium
**Tasks:** 13 main tasks, 98 subtasks

**Methods to Validate:**
- GET /workflows (list_workflows)
- GET /workflows/{id} (get_workflow)
- POST /workflows (create_workflow)
- PUT /workflows/{id} (update_workflow)
- DELETE /workflows/{id} (delete_workflow)
- PUT /workflows/{id}/activate (activate_workflow)
- PUT /workflows/{id}/deactivate (deactivate_workflow)
- Manual execution (execute_workflow)

---

#### Story 2.2: Validate & Test Executions API (3 methods)
**File:** [2.2.validate-executions-api.md](./2.2.validate-executions-api.md)
**Status:** Draft
**Complexity:** Low-Medium
**Tasks:** 11 main tasks, 79 subtasks

**Methods to Validate:**
- GET /executions (list_executions)
- GET /executions/{id} (get_execution)
- DELETE /executions/{id} (delete_execution)

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#### Story 2.3: Validate & Test Tags API (5 methods)
**File:** [2.3.validate-tags-api.md](./2.3.validate-tags-api.md)
**Status:** Draft
**Complexity:** Low-Medium
**Tasks:** 11 main tasks, 87 subtasks

**Methods to Validate:**
- GET /tags (get_tags)
- GET /tags/{id} (get_tag)
- POST /tags (create_tag)
- PUT /tags/{id} (update_tag)
- DELETE /tags/{id} (delete_tag)

---

### ✅ Phase 2: Implement Missing Methods (Stories 2.4-2.5)

#### Story 2.4: Implement PATCH /workflows/{id}
**File:** [2.4.implement-patch-workflow.md](./2.4.implement-patch-workflow.md)
**Status:** Draft
**Complexity:** Low
**Depends On:** Story 2.1
**Tasks:** 8 main tasks

**Deliverables:**
- New patch_workflow MCP tool
- N8NApiWrapper.patchWorkflow method
- Partial update functionality
- Comprehensive testing

---

#### Story 2.5: Implement POST /executions/{id}/retry
**File:** [2.5.implement-retry-execution.md](./2.5.implement-retry-execution.md)
**Status:** Draft
**Complexity:** Medium
**Depends On:** Story 2.2
**Tasks:** 8 main tasks

**Deliverables:**
- New retry_execution MCP tool
- N8NApiWrapper.retryExecution method
- Failed execution retry functionality
- Testing with failed execution generation

---

### 🔨 Phase 3: Credentials API Implementation (Stories 2.6.1-2.6.6)

**Note:** Credentials API is NOT currently implemented (0/6 methods). These stories implement from scratch.

#### Story 2.6.1: Implement GET /credentials (List)
**Status:** Draft (to be created)
**Complexity:** Medium
**Implementation Priority:** 1

**Deliverables:**
- list_credentials MCP tool
- Filtering by credential type
- Sensitive data masking
- Pagination support

---

#### Story 2.6.2: Implement GET /credentials/{id}
**Status:** Draft (to be created)
**Complexity:** Low
**Depends On:** Story 2.6.1
**Implementation Priority:** 2

**Deliverables:**
- get_credential MCP tool
- Single credential retrieval
- Data structure validation
- Sensitive field handling

---

#### Story 2.6.3: Implement POST /credentials
**Status:** Draft (to be created)
**Complexity:** Medium
**Depends On:** Story 2.6.2
**Implementation Priority:** 3

**Deliverables:**
- create_credential MCP tool
- Support multiple credential types
- Credential data validation
- Encryption handling

---

#### Story 2.6.4: Implement PUT /credentials/{id}
**Status:** Draft (to be created)
**Complexity:** Medium
**Depends On:** Story 2.6.3
**Implementation Priority:** 4

**Deliverables:**
- update_credential MCP tool
- Full credential replacement
- Credential modification testing
- Data validation

---

#### Story 2.6.5: Implement DELETE /credentials/{id}
**Status:** Draft (to be created)
**Complexity:** Low-Medium
**Depends On:** Story 2.6.4
**Implementation Priority:** 5

**Deliverables:**
- delete_credential MCP tool
- Workflow usage safety checks
- Cascade behavior testing
- Deletion validation

---

#### Story 2.6.6: Implement GET /credentials/schema/{typeName}
**Status:** Draft
**File:** 2.6.6.implement-get-credential-schema.md
**Complexity:** Medium
**Depends On:** Story 2.6.5
**Implementation Priority:** 6

**Deliverables:**
- get_credential_schema MCP tool
- JSON schema retrieval for credential types
- Schema-driven credential creation support
- Field validation and documentation

---

### 📋 Phase 4: Documentation & Quality Assurance (Story 2.7)

#### Story 2.7: Documentation Audit & Synchronization
**Status:** Draft (to be created)
**Complexity:** Medium
**Depends On:** All previous stories (2.1-2.6.6)

**Deliverables:**
- Complete documentation vs implementation comparison
- Updated docs with validation findings
- Implementation notes and limitations
- Final validation checklist
- CHANGELOG update
- Version 0.10.0 preparation

---

## Implementation Statistics

### Current Coverage

| Category | Total Methods | Implemented | Missing | Validated | % Complete |
|----------|---------------|-------------|---------|-----------|-----------|
| Workflows | 8 | 7 | 1 | 0 | 88% |
| Executions | 4 | 3 | 1 | 0 | 75% |
| Credentials | 6 | 0 | 6 | 0 | 0% |
| Tags | 5 | 5 | 0 | 0 | 100% |
| **TOTAL** | **23** | **15** | **8** | **0** | **65%** |

**Note:** Total is 23 methods from official n8n REST API documentation. The `execute_workflow` tool exists in MCP implementation but is not a standard n8n REST API endpoint (it's an MCP-specific wrapper).

### Target After Epic 2 Completion

| Category | Total Methods | Implemented | Validated | % Complete |
|----------|---------------|-------------|-----------|-----------|
| Workflows | 8 | 8 | 8 | 100% |
| Executions | 4 | 4 | 4 | 100% |
| Credentials | 6 | 6 | 6 | 100% |
| Tags | 5 | 5 | 5 | 100% |
| **TOTAL** | **23** | **23** | **23** | **100%** |

---

## Story Dependencies

```
Phase 1 (Validation):
  ├─ Story 2.1 (Workflows) ───┐
  ├─ Story 2.2 (Executions) ──┼─► Phase 2 (Missing Methods)
  └─ Story 2.3 (Tags) ────────┘
                               │
                               ├─ Story 2.4 (PATCH Workflow)
                               └─ Story 2.5 (Retry Execution)
                               │
Phase 3 (Credentials):         │
  Story 2.6.1 (List) ──────────┼─► Story 2.7
  Story 2.6.2 (Get) ───────────┤   (Documentation Audit)
  Story 2.6.3 (Create) ────────┤
  Story 2.6.4 (Update) ────────┤
  Story 2.6.5 (Delete) ────────┤
  Story 2.6.6 (Test) ──────────┘
```

---

## Recommended Implementation Order

### Sprint 1: Validation & Missing Methods
1. Story 2.1: Validate Workflows API
2. Story 2.2: Validate Executions API
3. Story 2.3: Validate Tags API
4. Story 2.4: Implement PATCH Workflow
5. Story 2.5: Implement Retry Execution

### Sprint 2: Credentials API (Part 1)
6. Story 2.6.1: Implement List Credentials
7. Story 2.6.2: Implement Get Credential
8. Story 2.6.3: Implement Create Credential

### Sprint 3: Credentials API (Part 2) & Documentation
9. Story 2.6.4: Implement Update Credential
10. Story 2.6.5: Implement Delete Credential
11. Story 2.6.6: Implement Test Credentials
12. Story 2.7: Documentation Audit & Sync

---

## Key Deliverables by Phase

### Phase 1 Deliverables
- ✅ Comprehensive validation reports for 16 existing methods
- ✅ Automated test suites for Workflows, Executions, Tags APIs
- ✅ Documentation accuracy assessment
- ✅ Baseline for implementation quality
- ✅ Identified discrepancies and issues

### Phase 2 Deliverables
- ✅ PATCH /workflows/{id} implemented and tested
- ✅ POST /executions/{id}/retry implemented and tested
- ✅ Workflows API 100% complete (9/9 methods)
- ✅ Executions API 100% complete (4/4 methods)

### Phase 3 Deliverables
- ✅ Complete Credentials API (6/6 methods)
- ✅ Credential management tools
- ✅ Credential type support
- ✅ Security considerations documented
- ✅ Comprehensive testing

### Phase 4 Deliverables
- ✅ 100% documentation accuracy
- ✅ All 24 methods validated
- ✅ Implementation notes and limitations documented
- ✅ CHANGELOG updated for v0.10.0
- ✅ Final validation checklist

---

## Testing Summary

### Total Test Coverage Required

**Validation Tests (Phase 1):**
- Workflows API: 98 subtasks
- Executions API: 79 subtasks
- Tags API: 87 subtasks
- **Subtotal:** 264 validation tests

**Implementation Tests (Phase 2-3):**
- PATCH Workflow: ~30 tests
- Retry Execution: ~25 tests
- Credentials API (6 methods): ~150 tests
- **Subtotal:** ~205 implementation tests

**Total:** ~469 comprehensive tests across all stories

---

## Documentation Files to Create

**Epic Level:**
- [x] epic-2-api-implementation-validation.md
- [x] EPIC-2-STORIES-INDEX.md (this file)

**Phase 1 Stories (Validation):**
- [x] 2.1.validate-workflows-api.md
- [x] 2.2.validate-executions-api.md
- [x] 2.3.validate-tags-api.md

**Phase 2 Stories (Missing Methods):**
- [x] 2.4.implement-patch-workflow.md
- [x] 2.5.implement-retry-execution.md

**Phase 3 Stories (Credentials API):**
- [x] 2.6.1.implement-list-credentials.md
- [x] 2.6.2.implement-get-credential.md
- [x] 2.6.3.implement-create-credential.md
- [x] 2.6.4.implement-update-credential.md
- [x] 2.6.5.implement-delete-credential.md
- [x] 2.6.6.implement-get-credential-schema.md

**Phase 4 Stories (Documentation):**
- [x] 2.7.documentation-audit-sync.md

---

## Change Log

| Date | Version | Description | Author |
|------|---------|-------------|--------|
| 2025-12-26 | 1.0 | Epic 2 stories index created with all 12 stories outlined | Sarah (PO) |

---

## Next Steps

1. ✅ **Epic 2 Created** - Complete epic definition
2. ✅ **Phase 1 Stories Created** - 3 validation stories (2.1-2.3)
3. ✅ **Phase 2 Stories Created** - 2 implementation stories (2.4-2.5)
4. ✅ **Phase 3 Stories Created** - 6 Credentials API stories (2.6.1-2.6.6)
5. ✅ **Phase 4 Story Created** - Documentation audit story (2.7)
6. ⏳ **Review & Approval** - PO review all stories
7. ⏳ **Sprint Planning** - Assign stories to sprints
8. ⏳ **Development** - Dev team implementation

**Status:** 12 of 12 stories created (100% complete) ✅
**Ready for:** Development phase