# oxify-model - Development TODO
**Codename:** The Brain (Data Models)
**Status:** ✅ Phase 1-6 Complete + Enhanced Versioning & Compatibility
**Next Phase:** Language Bindings & Advanced Features
---
## Phase 1: Core Data Models ✅ COMPLETE
**Goal:** Production-ready workflow data structures.
### Completed Tasks
- [x] Workflow data structures (Workflow, WorkflowMetadata)
- [x] Node types (Start, End, LLM, Retriever, Code, IfElse, Tool)
- [x] Edge connections with validation
- [x] Execution context tracking
- [x] ExecutionState enum (Pending, Running, Completed, Failed, Cancelled)
- [x] Serde serialization/deserialization
- [x] OpenAPI schema support (utoipa feature)
- [x] Workflow validation (DAG checks, node references)
- [x] Comprehensive test coverage
- [x] Zero warnings policy enforcement
### Achievement Metrics
- **Time investment:** 3 hours (vs 1 week from scratch)
- **Lines of code:** ~600 lines
- **Quality:** Zero warnings, 100% test pass rate
---
## Phase 2: Enhanced Node Types ✅ COMPLETE
**Goal:** Support more complex workflow patterns.
### Loop/Iteration Nodes ✅ COMPLETE (NEW)
- [x] **ForEach Node:** Iterate over arrays ✅
- [x] Support variable unpacking (iterate over JSON array)
- [x] Collection iteration with item and index variables
- [x] Template variable resolution ({{variable}})
- [x] Result collection for all iterations
- [x] Safety limits (max_iterations: 1000 default)
- [x] Parallel execution option ✅ COMPLETE
- [x] **While Node:** Conditional loops ✅
- [x] Condition expression evaluation
- [x] Max iteration safeguard
- [x] Counter tracking
- [x] Template variable support
- [x] Break condition support (via condition)
- [x] **Repeat Node:** Fixed iteration count ✅
- [x] Simple repeat N times
- [x] Counter variable available
- [x] Full integration with execution model
### Error Handling Nodes ✅ COMPLETE (NEW)
- [x] **Try-Catch-Finally Node:** Error handling ✅
- [x] Try block configuration
- [x] Catch block for error handling
- [x] Error variable binding (default: {{error}})
- [x] Optional rethrow for error propagation
- [x] Finally block for cleanup
- [x] Graceful error recovery or controlled failure
### Advanced Conditional Nodes ✅ COMPLETE (NEW)
- [x] **Switch/Case Node:** Multi-branch routing ✅
- [x] Expression-based routing (e.g., route by status field)
- [x] Default case fallback
- [x] Multiple condition matching
- [x] Regex support for match values
- [x] **Parallel Node:** Execute multiple branches concurrently ✅
- [x] All-branch execution (fan-out/fan-in) - WaitAll strategy
- [x] First-to-complete wins - Race strategy
- [x] AllSettled strategy (collect both successes and failures)
- [x] Timeout configuration
- [x] Max concurrency limit
### Human-in-the-Loop Nodes ✅ COMPLETE (NEW)
- [x] **Approval Node:** Wait for human approval ✅
- [x] Approval message and description
- [x] Required approvers (user IDs or roles)
- [x] Timeout configuration
- [x] Context data for approval UI
- [x] **Form Node:** Collect user input ✅
- [x] Form schema with multiple field types
- [x] 11 field types (Text, Number, Email, Password, TextArea, Select, MultiSelect, Radio, Checkbox, Date, DateTime)
- [x] Validation rules
- [x] Required/optional fields
- [x] Default values
- [x] Allowed submitters configuration
---
## Phase 3: Workflow Composition ✅ COMPLETE
**Goal:** Enable modular, reusable workflows.
### Sub-Workflows ✅ COMPLETE (NEW)
- [x] **SubWorkflow Node:** Execute another workflow as a node ✅
- [x] Parameter passing (map parent vars to child vars)
- [x] Result extraction (map child results to parent context)
- [x] Error propagation
- [x] Context inheritance option
- [x] Template variable resolution
- [x] File path configuration
### Workflow Templates ✅ COMPLETE (NEW)
- [x] **WorkflowTemplate:** Parameterized workflows ✅
- [x] Template parameter definitions (String, Integer, Float, Boolean, etc.)
- [x] Parameter validation with min/max, length, patterns
- [x] Template instantiation with placeholder substitution
- [x] Parameter types: Model, Secret, Collection for specialized use
- [x] Template categories and tags for discovery
- [x] Usage count tracking
- [x] Public/private templates
### Workflow Versioning ✅ COMPLETE (NEW)
- [x] **Versioning System:** Track workflow changes ✅
- [x] Semantic versioning (major.minor.patch)
- [x] Version compatibility checks
- [x] Migration paths between versions
- [x] WorkflowVersionHistory for tracking all versions
- [x] Version aliases (e.g., "latest", "stable")
- [x] Published/unpublished version support
- [x] **Change Tracking:** Audit workflow modifications ✅
- [x] Diff generation between versions (WorkflowDiff)
- [x] Author and timestamp metadata
- [x] Change reason/description
- [x] Detailed changelog entries
- [x] Breaking change detection
- [x] Affected node tracking
- [x] ChangelogType enum (Added, Changed, Deprecated, Removed, Fixed, Security)
---
## Phase 4: Advanced Execution Features ✅ COMPLETE
**Goal:** Robust execution with retry, timeout, and checkpointing.
### Retry & Timeout ✅ COMPLETE
- [x] **Retry Configuration:** Per-node retry policies ✅
- [x] Max retries count
- [x] Backoff strategy (exponential)
- [x] Initial delay and max delay configuration
- [x] Retry count tracking in results
- [x] **Timeout Configuration:** Per-node timeouts ✅ NEW
- [x] Execution timeout (max duration)
- [x] Idle timeout (no progress)
- [x] Timeout action (Fail, Skip, UseDefault)
### Workflow Validation ✅ COMPLETE (NEW)
- [x] **Comprehensive Validation:** ✅
- [x] Cycle detection (prevents infinite loops)
- [x] Orphan node detection (unreachable nodes)
- [x] Start/End node validation (required nodes)
- [x] Edge reference validation (valid node IDs)
- [x] Conditional node validation (both branches required)
- [x] Detailed error messages with node IDs
### Checkpointing ✅ COMPLETE (NEW)
- [x] **Checkpoint Support:** Save/restore execution state ✅
- [x] Checkpoint frequency configuration (EveryNNodes, TimeInterval, BeforeNodeTypes, Manual, Always)
- [x] Checkpoint storage abstraction (CheckpointStorage trait)
- [x] Automatic checkpoint threshold for long-running nodes
- [x] In-memory storage implementation for testing
- [x] Checkpoint pruning and retention management
- [x] **Resume from Checkpoint:** Recover failed executions ✅
- [x] Skip completed nodes (via ExecutionCheckpoint.completed_nodes)
- [x] Variable state restoration
- [x] ExecutionContext with pause/resume capabilities
- [x] Checkpoint metadata tracking
---
## Phase 5: Observability & Metadata ✅ COMPLETE
**Goal:** Rich metadata for debugging and monitoring.
### Execution Metrics ✅ COMPLETE (NEW)
- [x] **Node Execution Metrics:** Track performance ✅
- [x] Execution duration (per node)
- [x] Token usage (TokenUsage struct with input/output/total tokens)
- [x] Cost estimation (cost_usd field)
- [x] API call count tracking
- [x] Bytes transferred tracking
- [x] Memory usage tracking
- [x] Custom metrics map
### Execution Events ✅ COMPLETE (NEW)
- [x] **Execution Events:** Detailed event timeline ✅
- [x] Node started/completed events
- [x] Variable changes
- [x] Error events with stack traces
- [x] Workflow-level events (started, completed, failed, cancelled)
- [x] EventTimeline with filtering capabilities
- [x] Time range filtering and event counting
- [x] 6 comprehensive tests covering all event types
### Workflow Analytics ✅ COMPLETE (NEW)
- [x] **Usage Tracking:** Workflow execution statistics ✅
- [x] Execution count (total, successful, failed, cancelled)
- [x] Success/failure rates
- [x] Executions per hour
- [x] Average duration with percentiles (p50, p95, p99)
- [x] Hotspots (slowest nodes with bottleneck detection)
- [x] Node-level analytics (execution count, duration, time percentage)
- [x] Error pattern analysis with trending
- [x] AnalyticsBuilder for processing event timelines
- [x] 6 comprehensive tests covering all analytics features
- [x] **Optimization Suggestions:** AI-powered recommendations ✅ COMPLETE
- [x] Identify redundant nodes
- [x] Suggest parallel execution opportunities
- [x] Cost reduction analysis
- [x] Performance improvement suggestions
- [x] Model selection improvements
- [x] Recommend caching strategies ✅ COMPLETE
---
## Phase 6: Schema Evolution ✅ COMPLETE (NEW)
**Goal:** Backwards-compatible schema changes.
### Schema Versioning ✅ COMPLETE
- [x] **Schema Version Type:** SchemaVersion struct (major.minor.patch) ✅
- [x] **Version Parsing:** Parse from string format ✅
- [x] **Version Comparison:** is_newer_than, is_compatible_with ✅
- [x] **Migration Support:** requires_migration_from check ✅
- [x] **Versioned Container:** Versioned<T> wrapper with migration notes ✅
- [x] **Migration Registry:** Track and apply migrations ✅
- [x] **Model Metadata:** ModelMetadata with checksum support ✅
### Compatibility ✅ COMPLETE (NEW)
- [x] **Version Ordering:** Full Ord/PartialOrd implementation ✅
- [x] **Forward Compatibility:** Unknown field preservation ✅
- [x] PreservedFields container for unknown data
- [x] Integration with Versioned<T> container
- [x] JSON value preservation
- [x] **Backward Compatibility:** Automatic field migrations ✅
- [x] FieldMigration trait for renaming and transforming fields
- [x] DeprecatedField tracking with replacement mappings
- [x] Automatic field renaming during deserialization
---
## Testing & Quality ✅ COMPLETE
### Current Status ✅
- [x] Unit tests: 393 tests, 100% passing (updated 2026-01-09) ✅
- [x] Added 20 comprehensive tests to secret.rs module (0 → 20 tests)
- [x] Added 6 additional tests to edge.rs module (1 → 7 tests)
- [x] Added 14 additional tests to execution.rs module (1 → 15 tests)
- [x] Added 38 additional tests to workflow.rs module (3 → 41 tests) ✅
- [x] Fixed test_utils.rs import issue (ExecutionState moved to test submodule) ✅
- [x] Doc tests: All 19 examples compile and pass (updated 2026-01-09) ✅
- [x] Fixed rollback.rs doc test (was ignored, now working)
- [x] Fixed typescript.rs doc test (was ignored, now working)
- [x] Zero warnings: Strict NO WARNINGS POLICY enforced ✅
- [x] OpenAPI feature: ✅ COMPLETE (utoipa 5.4.0 works perfectly)
### Property-Based Testing ✅ COMPLETE (NEW)
- [x] **Property-Based Testing:** Use Proptest ✅
- [x] Fuzz workflow validation
- [x] Random workflow generation
- [x] Invariant checking (DAG property)
- [x] 6 property tests covering:
- Valid DAG validation
- Missing start/end node detection
- Invalid edge detection
- Stats consistency
- Duplicate edge detection
### Benchmark Suite ✅ COMPLETE (NEW)
- [x] **Benchmark Suite:** Track performance ✅
- [x] Serialization/deserialization benchmarks (JSON & YAML)
- [x] Validation benchmarks for large workflows (linear & branching)
- [x] Node creation benchmarks
- [x] Workflow construction benchmarks
- [x] Template instantiation benchmarks
- [x] Event timeline benchmarks
- [x] Zero warnings in benchmark code
---
## Documentation
### Current Status ✅
- [x] Comprehensive README with examples
- [x] API reference documentation
- [x] Node configuration guides
### Planned Enhancements
- [ ] **Visual Documentation:** Diagrams and flowcharts
- [ ] Node type reference (visual guide)
- [ ] Execution state machine diagram
- [ ] Example workflow gallery
- [ ] **Migration Guides:** Upgrade paths
- [ ] v0.1 → v1.0 migration guide
- [ ] Breaking changes documentation
---
## Integration
### OpenAPI Support
- [x] utoipa schemas for all types (current)
- [x] JSON Schema generation ✅ COMPLETE
- [x] GraphQL schema generation ✅ COMPLETE
### Workflow Visualization Export ✅ COMPLETE
- [x] **Visualization Module:** Export workflows to diagram formats ✅
- [x] Mermaid flowchart format (markdown-friendly)
- [x] Graphviz DOT format (industry standard)
- [x] PlantUML activity diagram format
- [x] Customizable styling (colors, orientation, labels)
- [x] Helper functions: workflow_to_mermaid, workflow_to_graphviz, workflow_to_plantuml
- [x] 10 comprehensive unit tests
- [x] Full integration with WorkflowBuilder
### Language Bindings
- [x] **Python Bindings:** PyO3 ✅ COMPLETE
- [x] Python API for workflow creation (PyWorkflow, PyWorkflowBuilder)
- [x] JSON/YAML serialization support
- [x] Workflow validation from Python
- [x] Builder pattern with fluent API
- [x] LLM and Code node support
- [x] Type hints and IDE support (.pyi stub files) ✅
- [x] Advanced node types: Retriever, Switch, ForEach loops ✅
- [x] While loop and Repeat loop support ✅ NEW
- [x] TryCatch error handling node ✅ NEW
- [x] SubWorkflow node for workflow composition ✅ NEW
- [x] Parallel execution node (WaitAll, Race, AllSettled) ✅ NEW
- [x] Approval node (human-in-the-loop) ✅ NEW
- [x] Form input node (11 field types) ✅ NEW
- [x] 22 comprehensive unit tests
- [x] **TypeScript/WASM Bindings:** wasm-bindgen ✅ COMPLETE
- [x] WASM module for browser usage
- [x] WasmWorkflow for workflow manipulation (JSON/YAML roundtrip)
- [x] WasmWorkflowBuilder for fluent workflow construction
- [x] All node types: LLM, Code, Retriever, IfElse, Switch, Tool, Loop (ForEach, While, Repeat)
- [x] WasmWorkflowUtils for utility functions (UUID, JSON/YAML conversion)
- [x] 11 comprehensive tests
- [x] Compile with `cargo build --features wasm` or `wasm-pack build --features wasm`
- [x] TypeScript type definitions (.d.ts file generation) ✅ COMPLETE
- [x] typescript.rs module with comprehensive type definitions
- [x] generate_typescript_definitions() function
- [x] All workflow, node, edge, execution types covered
- [x] WASM binding types documented
- [x] 6 comprehensive tests
---
## License
MIT OR Apache-2.0
---
## Completed Features Reference
### Timeout Configuration ✅ COMPLETE
- **Implementation:** `src/node.rs` - TimeoutConfig struct
- **Features:**
- Execution timeout (max duration in ms)
- Idle timeout (no progress timeout)
- TimeoutAction enum (Fail, Skip, UseDefault)
- Builder pattern with `with_timeout()` method
### Execution Metrics ✅ COMPLETE
- **Implementation:** `src/execution.rs` - NodeMetrics & TokenUsage
- **Features:**
- Duration tracking (auto-calculated on complete)
- Token usage for LLM nodes (input/output/total)
- Cost estimation (cost_usd)
- API call count and bytes transferred
- Custom metrics map for provider-specific data
### Workflow Templates ✅ COMPLETE
- **Implementation:** `src/template.rs` (~500 lines)
- **Features:**
- Parameterized workflow templates
- Multiple parameter types (String, Integer, Float, Boolean, Enum, etc.)
- Parameter validation with min/max, length, patterns
- Template instantiation with placeholder substitution
- Template gallery and listing support
### Schema Versioning ✅ COMPLETE
- **Implementation:** `src/schema.rs` (~300 lines)
- **Features:**
- SchemaVersion type with parsing and comparison
- Versioned<T> container with migration support
- MigrationRegistry for managing migrations
- ModelMetadata with schema version tracking
### Enhanced Validation ✅ COMPLETE
- **Implementation:** `src/validation.rs` - validate_advanced_nodes
- **Features:**
- Switch node validation (cases, expressions)
- Parallel node validation (tasks, duplicate IDs)
- Approval node validation (message required)
- Form node validation (fields, duplicate IDs)
- Loop node validation (collection path, body)
- TryCatch/SubWorkflow validation
### Webhook Tests ✅ COMPLETE
- **Implementation:** `src/webhook.rs` - 11 new tests
- **Features:**
- Webhook creation and configuration
- Event type matching
- IP whitelist validation
- Header validation
- Trigger counting and success rate
- HMAC signature verification
**Total New Code:** ~1200 lines
**Total Tests:** 33 (from 13)
**Warnings:** Zero (maintained NO WARNINGS POLICY)
---
### Execution Events ✅ COMPLETE
- **Implementation:** `src/event.rs` (~550 lines)
- **Features:**
- ExecutionEvent with comprehensive event types
- EventTimeline with filtering and querying
- Node-level and workflow-level event tracking
- Variable change tracking
- Error tracking with stack traces
- Checkpoint and resume events
- Time-based filtering
- 6 unit tests covering all event types
### Property-Based Testing ✅ COMPLETE
- **Implementation:** `src/validation.rs` - proptest integration
- **Features:**
- 6 property-based tests using Proptest
- DAG invariant checking
- Validation fuzzing
- Random workflow generation
- Bug fixes in validation logic (edge validation ordering)
### Benchmark Suite ✅ COMPLETE
- **Implementation:** `benches/workflow_benchmarks.rs` (~370 lines)
- **Features:**
- Criterion-based benchmarking
- 7 benchmark groups:
- Serialization (JSON/YAML)
- Deserialization (JSON/YAML)
- Validation (linear & branching workflows)
- Node creation
- Workflow construction
- Template instantiation
- Event timeline operations
- Throughput measurement
- Multiple workflow sizes (10, 50, 100, 200 nodes)
### Workflow Analytics ✅ COMPLETE
- **Implementation:** `src/analytics.rs` (~700 lines)
- **Features:**
- WorkflowAnalytics with comprehensive statistics
- ExecutionStats (total, success/failure rates, executions per hour)
- PerformanceMetrics with percentiles (p50, p95, p99, min, max, avg)
- NodeAnalytics with bottleneck detection (time percentage, slowest nodes)
- ErrorPattern analysis (occurrence count, affected nodes, trending)
- AnalyticsBuilder for processing event timelines
- AnalyticsPeriod helpers (hourly, daily, weekly, monthly)
- 6 comprehensive unit tests
**Total New Code Today:** ~1700 lines
**Total Tests:** 51 (from 45) + 6 property tests = **57 tests**
**Benchmarks:** 7 comprehensive benchmark groups
**Warnings:** Zero (maintained NO WARNINGS POLICY)
---
### Advanced Node Types - Comprehensive Testing ✅ COMPLETE
- **Implementation:** All advanced node types were already implemented, but lacked comprehensive tests
- **Added Tests:**
- 8 new node tests in `src/node.rs`:
- `test_switch_node` - Switch node creation and configuration
- `test_parallel_node` - Parallel node with WaitAll strategy
- `test_parallel_strategy_race` - Race strategy testing
- `test_approval_node` - Approval node configuration
- `test_form_node` - Form node with multiple field types
- `test_form_field_types` - All 11 form field types
- `test_node_with_retry_and_timeout` - Combined retry and timeout
- 10 new validation tests in `src/validation.rs`:
- `test_switch_node_empty_expression` - Validates switch expression requirement
- `test_switch_node_no_cases` - Validates cases requirement
- `test_parallel_node_no_tasks` - Validates tasks requirement
- `test_parallel_node_empty_expression` - Validates task expressions
- `test_parallel_node_duplicate_task_id` - Prevents duplicate task IDs
- `test_approval_node_empty_message` - Validates message requirement
- `test_form_node_no_fields` - Validates fields requirement
- `test_form_node_duplicate_field_id` - Prevents duplicate field IDs
- `test_valid_switch_node` - Confirms valid switch passes
- `test_valid_parallel_node` - Confirms valid parallel passes
### Bug Fixes ✅ COMPLETE
- **Fixed Clippy Warnings:**
- `src/analytics.rs:371` - Changed `or_insert_with(NodeStats::default)` to `or_default()`
- `src/analytics.rs:479` - Changed `into_iter().map(|(_, stats)|` to `into_values().map(|stats|`
**Total New Code:** ~350 lines (tests)
**Total Tests:** 68 (from 51) = **+17 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** 100%
### Checkpointing System ✅ COMPLETE
- **Implementation:** `src/checkpoint.rs` (~450 lines)
- **Features:**
- CheckpointConfig with multiple frequency strategies
- CheckpointStorage trait for pluggable backends
- InMemoryCheckpointStorage implementation
- Checkpoint metadata tracking (size, compression, timestamps)
- Automatic pruning and retention management
- Integration with existing ExecutionContext
- 7 comprehensive unit tests:
- `test_checkpoint_config_default`
- `test_checkpoint_frequency_variants`
- `test_in_memory_storage_save_load`
- `test_list_checkpoints`
- `test_prune_checkpoints`
- `test_delete_all_checkpoints`
- `test_multiple_executions`
**Total New Code (Checkpointing):** ~450 lines
**Total Tests:** 75 (from 68) = **+7 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
### Workflow Versioning & Change Tracking ✅ COMPLETE
- **Implementation:** `src/versioning.rs` (~600 lines)
- **Features:**
- WorkflowVersionHistory with full version tracking
- WorkflowVersionEntry with author, changelog, tags
- VersionCompatibility checker for upgrade/downgrade validation
- WorkflowDiff with comprehensive change detection:
- Node additions/removals/modifications
- Edge additions/removals
- Metadata changes
- ChangelogEntry with 6 types (Added, Changed, Deprecated, Removed, Fixed, Security)
- Breaking change detection and tracking
- Version aliases ("latest", "stable", etc.)
- Published/unpublished version support
- History queries between versions
- Diff summary generation
- 10 comprehensive unit tests:
- `test_version_history_creation`
- `test_add_version_to_history`
- `test_version_sorting`
- `test_version_aliases`
- `test_version_compatibility_check`
- `test_workflow_diff_generation`
- `test_workflow_diff_no_changes`
- `test_breaking_changes_detection`
- `test_get_history_between_versions`
- `test_diff_summary`
**Total New Code (Versioning):** ~600 lines
**Total Tests:** 85 (from 75) = **+10 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
### Forward/Backward Compatibility ✅ COMPLETE
- **Implementation:** `src/schema.rs` (enhanced with ~200 lines)
- **Features:**
- PreservedFields container for unknown field storage
- VersionedWithCompat<T> enhanced versioned container
- DeprecatedField tracking with version support
- FieldMigration trait for automatic field transformations
- BackwardCompatibility helper for JSON migrations
- Support for field renaming and removal timelines
- 6 comprehensive unit tests:
- `test_preserved_fields_creation`
- `test_versioned_with_compat`
- `test_deprecated_field`
- `test_backward_compatibility_migration`
- `test_backward_compatibility_multiple_fields`
- `test_preserved_fields_serialization`
**Total New Code (Compatibility):** ~200 lines
**Total Tests:** 91 (from 85) = **+6 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
---
### JSON Schema Generation ✅ COMPLETE
- **Implementation:** `src/json_schema.rs` (~470 lines + 15 tests)
- **Features:**
- JsonSchema struct with full JSON Schema Draft 2020-12 support
- WorkflowSchemaGenerator for workflows, metadata, nodes, edges
- Support for object, array, string, number, integer, boolean types
- Enum values, patterns, formats, references
- Schema validation for workflows
- Helper functions: `generate_workflow_schema()`, `schema_to_json()`, `schema_to_value()`
- 15 comprehensive unit tests covering all schema features
- Export as JSON for validation, documentation, and integration
### GraphQL Schema Generation ✅ COMPLETE
- **Implementation:** `src/graphql_schema.rs` (~630 lines + 14 tests)
- **Features:**
- GraphQL Schema Definition Language (SDL) generation
- GraphQLType, GraphQLField, GraphQLArgument structs
- Support for Object, Enum, Interface, Input types
- Workflow, Node, Edge, WorkflowMetadata types
- NodeKind and ExecutionState enums
- Query type with workflow queries (get by ID, list)
- Mutation type with workflow mutations (create, delete)
- Custom scalar for DateTime
- Full SDL export with proper formatting
- 14 comprehensive unit tests
**Total New Code Today:** ~1100 lines (470 JSON Schema + 630 GraphQL)
**Total Tests:** 120 (from 91) = **+29 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** 100%
---
### Workflow Builder Pattern ✅ COMPLETE
- **Implementation:** `src/builder.rs` (~510 lines + 9 tests)
- **Features:**
- WorkflowBuilder with fluent API for workflow construction
- NodeBuilder for configuring individual nodes
- Auto-connection between consecutive nodes
- Support for all node types: start, end, llm, code, retriever, if_else, tool, loop, try_catch, sub_workflow, switch, parallel, approval, form
- Builder methods: description, version, tag, tags
- Custom connections: connect(index, index), connect_ids(id, id)
- Helper methods: last_node_id(), node_id_at(index)
- Retry and timeout configuration support
- Position setting for visual editor
- 9 comprehensive unit tests
### YAML Serialization Support ✅ COMPLETE
- **Implementation:** `src/yaml.rs` (~300 lines + 10 tests)
- **Features:**
- Workflow YAML serialization/deserialization
- WorkflowTemplate YAML support
- File I/O: save_workflow_yaml(), load_workflow_yaml()
- Template I/O: save_template_yaml(), load_template_yaml()
- Format conversion: json_to_yaml(), yaml_to_json()
- YamlError enum with detailed error handling
- Roundtrip serialization integrity
- 10 comprehensive unit tests
- Zero warnings maintained
**Total New Code (Part 2):** ~810 lines (510 Builder + 300 YAML)
**Total Tests:** 138 (from 120) = **+18 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** 100%
---
### Python Bindings (PyO3) ✅ COMPLETE
- **Implementation:** `src/python.rs` (~580 lines + 13 tests)
- **Features:**
- PyWorkflow class with workflow manipulation
- PyWorkflowBuilder for fluent workflow construction
- JSON and YAML serialization/deserialization
- Workflow validation from Python
- **Node Type Support:**
- ✅ Start/End nodes
- ✅ LLM nodes (with provider, model, prompt templates)
- ✅ Code execution nodes (Rust/WASM runtimes)
- ✅ Vector retrieval nodes (for RAG pipelines)
- ✅ Switch/Case nodes (multi-branch routing)
- ✅ ForEach loop nodes (collection iteration)
- Tag management and metadata access
- Full workflow introspection (node counts, IDs, names)
- Builder pattern with method chaining
- Python type stubs (.pyi file) for IDE support
- 13 comprehensive unit tests
- Optional feature flag (`python = ["pyo3"]`)
- Zero warnings maintained
**Total New Code:** ~580 lines
**Total Tests:** 177 (maintained from previous)
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Build Status:** ✅ Compiles successfully with `--features python`
### Python Type Stubs (.pyi) ✅ COMPLETE
- **Implementation:** `/tmp/oxify_model.pyi` (~450 lines)
- **Features:**
- Complete type hints for PyWorkflow and PyWorkflowBuilder
- Method signatures with proper typing
- Comprehensive docstrings with examples
- Support for static type checkers (mypy, pyright)
- IDE autocomplete and IntelliSense support
## Recent Additions (2026-01-06)
### Documentation Quality Improvements ✅ COMPLETE
- **Doc Tests Fixed:**
- Fixed `rollback.rs` doc test (line 15) - was ignored, now compiles and passes
- Updated to use `ExecutionContext::new()` constructor
- Added proper imports (uuid::Uuid)
- Verified rollback functionality with assertion
- Fixed `typescript.rs` doc test (line 15) - was ignored, now compiles and passes
- Updated to use assertions instead of file I/O
- Verified TypeScript definition generation
- Added helpful production usage comment
### Test Coverage Enhancement ✅ COMPLETE (NEW)
- **Added 70 Comprehensive Tests:**
- **secret.rs** (0 → 20 tests):
- Secret creation and basic operations
- Expiration checking (no expiry, future, past)
- Workflow access control (empty list, in list, not in list)
- User access control (owner, non-owner, allowed users)
- Mark accessed timestamp updates
- Safe view creation and expiration reflection
- SecretAction display trait
- AccessControl defaults
- EncryptionMetadata fields
- SecretReference usage
- CreateSecretRequest and UpdateSecretRequest
- **edge.rs** (1 → 7 tests, +6 tests):
- Basic edge creation
- Edge with label only
- Edge with condition only
- Unique ID generation
- Builder pattern chaining
- JSON serialization roundtrip
- **execution.rs** (1 → 15 tests, +14 tests):
- ExecutionContext creation and initialization
- Pause/resume functionality
- Cancel and mark completed operations
- Variable management (set/get)
- Checkpoint creation and resumption
- NodeExecutionResult creation and completion
- NodeMetrics handling
- ExecutionResult variants (Pending, Success, Failure, Skipped)
- ExecutionState variants
- TokenUsage tracking
- Default values
- **workflow.rs** (3 → 33 tests, +30 tests):
- WorkflowMetadata creation and version parsing
- Version bumping (major, minor, patch)
- Workflow creation and node/edge management
- Node lookup (get_node, get_node_not_found)
- Edge queries (outgoing, incoming)
- JSON serialization/deserialization
- YAML serialization/deserialization
- Version creation (major, minor, patch)
- Version comparison (is_newer_than, version_tuple)
- WorkflowSchedule creation and configuration
- Schedule validation (timezone, enabled, max concurrent runs, date range)
- Schedule validity checking (disabled, before start, after end, within range)
- VersionBump enum equality
- **Type Enhancements:**
- Added `PartialEq` derive to `TokenUsage` for better testability
- Added `PartialEq` derive to `ExecutionResult` for comparison support
**Total New Tests:** 70 tests (+30 from previous session)
**Doc Test Status:** ✅ 7/7 passing (100%)
**Unit Test Status:** ✅ 356/356 passing (100%, +70 from 286)
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**All Features:** ✅ Compile cleanly (openapi, wasm, typescript verified)
**Clippy Status:** ✅ Clean across all targets
---
**Last Updated:** 2026-01-09
**Document Version:** 3.3
**Status:** Phase 1-6 Complete + All Bindings (Python, TypeScript/WASM) + Parallel ForEach + Optimization Engine + OpenAPI Fixed + Workflow Simulator + Workflow Linter + Workflow Visualization Export + Cache Management + Security Scanner + Doc Tests Fixed + Test Coverage Enhanced (393 unit tests + 19 doc tests = 412 total) + Enhanced Workflow API + Zero Warnings ✅
**Next:** Migration guides, visual documentation
---
### Parallel ForEach Execution ✅ COMPLETE
- **Implementation:** `src/node.rs` - Enhanced ForEach loop with parallel execution
- **Features:**
- `parallel` field to enable concurrent iteration processing
- `max_concurrency` field to control parallelism level
- Backwards compatible (defaults to sequential execution)
- Full integration with all language bindings:
- Rust builder pattern (automatic support via LoopConfig)
- Python bindings (`for_each` method with new parameters)
- WASM bindings (`forEachNode` with optional parallel parameters)
- TypeScript definitions updated (ForEachLoop interface)
- 4 comprehensive unit tests:
- `test_foreach_parallel_execution` - Parallel mode verification
- `test_foreach_sequential_execution` - Sequential mode verification
- `test_foreach_serialization_with_parallel` - JSON roundtrip test
- `test_py_workflow_builder_with_parallel_foreach` - Python integration test
- `test_wasm_builder_parallel_foreach` - WASM integration test
**Total New Code:** ~150 lines
**Total Tests:** 217 (from 214) = **+3 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** 100%
### Documentation Updates ✅ COMPLETE
- **Updated TODO.md:**
- Marked parallel ForEach execution as complete
- Marked optimization suggestions as complete (already implemented)
- Updated test count: 138 → 217
- Updated last updated date and version
- Added this changelog section
### Caching Strategy Recommendations ✅ COMPLETE
- **Implementation:** `src/optimizer.rs` - Enhanced WorkflowOptimizer with caching analysis
- **Features:**
- `analyze_caching()` method for identifying caching opportunities
- Detects deterministic LLM prompts suitable for response caching
- Identifies nodes in loops that benefit from memoization
- Vector retrieval caching recommendations with TTL suggestions
- Code node memoization for pure functions
- Severity-based recommendations (High for loops, Medium for general caching)
- Benefit quantification (cost savings, time savings)
- 2 comprehensive unit tests:
- `test_caching_recommendations` - General caching suggestions
- `test_caching_in_loop` - Loop-specific memoization validation
- Helper function `is_node_in_loop()` for loop detection
**Total New Code:** ~120 lines
**Total Tests:** 219 (from 217) = **+2 new tests**
**Warnings:** Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** 100%
---
### Bug Fixes & Quality Improvements ✅ COMPLETE
- **Python Bindings Fixes:**
- Fixed missing `parallel` and `max_concurrency` fields in ForEach loop initializer (python.rs:763)
- Fixed borrow-of-moved-value error in parallel foreach test (python.rs:1042)
- Python bindings now compile successfully with all recent ForEach enhancements
- **OpenAPI Feature Verification:**
- Verified utoipa 5.4.0 works correctly (previously marked as broken)
- All 219 tests pass with `--features openapi`
- Zero warnings maintained
- Marked OpenAPI feature as complete in testing status
- **Clippy Warnings Fixed:**
- Replaced deprecated `criterion::black_box` with `std::hint::black_box` in benchmarks
- All 40 clippy warnings in benchmarks eliminated
- Removed duplicated `#![cfg(feature = "python")]` attribute in python.rs (already gated in lib.rs)
- Benchmarks and all code compile cleanly without warnings
- **Feature Testing:**
- ✅ Default features: 219 tests passing
- ✅ OpenAPI feature: 219 tests passing
- ✅ Python feature: Compiles successfully (cargo check)
- ✅ WASM feature: 231 tests passing
- ✅ TypeScript feature: 219 tests passing
**Total Fixes:** 2 compilation errors + 41 clippy warnings resolved (40 benchmark + 1 duplicated attribute)
**Total Tests:** 219 (maintained, 100% passing)
**Warnings:** Zero across all features and targets (maintained NO WARNINGS POLICY)
**All Optional Features:** ✅ Working correctly
**Clippy Status:** ✅ Clean with --all-features --all-targets
---
### Workflow Simulator ✅ COMPLETE
- **Implementation:** `src/simulator.rs` (~850 lines + 10 tests)
- **Purpose:** Dry-run workflow execution for testing and validation without making real API calls
- **Key Features:**
- **Simulation Capabilities:**
- Execute workflows in simulation mode with mock responses
- Test conditional branches (if-else, switch) and loops
- Generate comprehensive execution traces
- Track branch coverage and execution paths
- Validate workflow structure and flow
- **Mock Data Support:**
- Configure mock responses for specific nodes
- Override node outputs for testing
- Deterministic simulation with random seed support
- **Execution Traces:**
- Detailed node execution timeline
- Input/output context for each node
- Execution time estimates per node
- Branch decision tracking
- **Coverage Analysis:**
- Node coverage percentage calculation
- Identify unexecuted nodes
- Track which conditional branches were taken
- Detect untested paths in workflows
- **Integration with Existing Tools:**
- Cost estimation integration (CostEstimator)
- Time prediction integration (TimePredictor)
- Works with all node types (LLM, Code, Retriever, Tool, etc.)
- **Builder Pattern API:**
- Fluent API for simulator configuration
- Optional cost/time estimation
- Configurable max steps limit (prevents infinite loops)
- Latency simulation toggle
- **Testing Features:**
- Simplified condition evaluation (for basic testing)
- Loop simulation (single iteration by default)
- Error tracking and reporting
- Warning generation for simulation limitations
- **Public API:**
- `WorkflowSimulator` - Main simulator with builder pattern
- `SimulationResult` - Complete simulation output
- `ExecutionTrace` - Detailed execution path
- `NodeExecutionDetail` - Per-node execution information
- `CoverageInfo` - Branch and node coverage data
- `SimulationError` - Error reporting
- **Usage Example:**
```rust
let simulator = WorkflowSimulator::new()
.with_mock_responses(vec![
("llm_node".to_string(), json!("mock response"))
])
.estimate_costs(true)
.estimate_times(true)
.simulate_latencies(false)
.max_steps(1000);
let result = simulator.simulate(&workflow, initial_context)?;
assert_eq!(result.coverage.coverage_percent, 100.0);
```
- **Use Cases:**
- **Workflow Testing:** Validate workflows before deployment
- **Branch Coverage:** Ensure all conditional paths are tested
- **Cost Estimation:** Preview costs without real API calls
- **Development:** Rapid iteration without external dependencies
- **CI/CD:** Automated workflow validation in pipelines
- **Documentation:** Generate execution examples for docs
**Total New Code:** ~850 lines
**Total Tests:** 228 (from 219) = **+9 new simulator tests**
**Warnings:** 1 minor unused variable (non-critical)
**Test Pass Rate:** 100%
**Module Status:** ✅ Fully functional and tested
---
### Workflow Linter ✅ COMPLETE
- **Implementation:** `src/linter.rs` (~800 lines + 16 tests)
- **Purpose:** Code quality and best practices checking for workflows
- **Key Features:**
- **Lint Severities:** Error, Warning, Info levels
- **Lint Categories:** Performance, Security, Maintainability, ResourceUsage, BestPractice, Reliability
- **Configurable Rules:** LinterConfig with customizable thresholds
- **11 Comprehensive Lint Rules:**
1. **Unreachable Nodes:** Detect nodes not reachable from start nodes
2. **Missing Error Handling:** Warn about risky operations without try-catch or retry
3. **Excessive Retries:** Flag retry counts above recommended limits
4. **Missing Timeouts:** Identify long-running operations without timeouts
5. **Sequential Opportunities:** Suggest parallelization for long chains
6. **Deep Nesting:** Warn about deeply nested conditional structures
7. **Naming Conventions:** Check for generic or too-short node names
8. **Hardcoded Secrets:** Detect potential hardcoded API keys or passwords
9. **Loop Safety:** Validate loop iteration limits
10. **Dead-End Paths:** Find paths that don't lead to End nodes
11. **Performance Anti-patterns:** Identify optimization opportunities
- **Rich Findings:**
- Rule ID, severity, category
- Human-readable messages
- Optional suggestions for fixing
- Node ID tracking
- Filtering by severity and category
- **Statistics:**
- Total findings count
- Breakdown by severity (errors, warnings, info)
- Easy querying and reporting
- **Use Cases:**
- Pre-deployment validation
- CI/CD integration
- Code review automation
- Best practices enforcement
- Security scanning
- Performance optimization guidance
**Total New Code:** ~800 lines
**Total Tests:** 243 unit tests (from 228) = **+15 new linter tests**
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** ✅ 100% (all 243 tests passing)
**Module Status:** ✅ Fully functional with comprehensive coverage
**Integration:** ✅ Exported in lib.rs and ready for use
---
### Clippy Warning Fixes ✅ COMPLETE
- **Fixed 5 warnings in linter.rs:**
- Changed 4 recursive helper methods from instance methods (`&self`) to associated functions (`Self::`)
- `mark_reachable` - DFS traversal for reachability analysis
- `find_longest_chain` - Sequential chain detection
- `calculate_nesting_depth` - Conditional nesting analysis
- `mark_can_reach_end` - Reverse reachability check
- Converted `match` with single arm to `if let` in `check_loop_safety`
- Fixed `wrong_self_convention` warnings in DiagramOrientation (changed `&self` to `self` for Copy type)
- Fixed `useless_format!` warnings (replaced with direct string literals)
**Total Fixes:** 5 warnings eliminated
**Warnings:** ✅ Zero across all features and targets
### Workflow Visualization Export ✅ COMPLETE (NEW)
- **Implementation:** `src/visualization.rs` (~637 lines + 10 tests)
- **Purpose:** Export workflows to popular diagram formats for documentation and visualization
- **Key Features:**
- **Three Export Formats:**
1. **Mermaid:** Markdown-friendly flowchart format
- Popular in GitHub, GitLab, Notion, Obsidian
- Customizable node shapes based on node type
- Color-coded styling with CSS classes
- Support for edge labels and descriptions
2. **Graphviz DOT:** Industry-standard graph visualization
- Professional diagram generation
- Configurable node shapes (box, diamond, ellipse, hexagon, parallelogram)
- Color-coded nodes by type
- Graph metadata and labels
3. **PlantUML:** UML activity diagram format
- Topological sort for correct execution order
- Support for branches and loops
- Standard UML notation
- **Customization Options:**
- `VisualizationStyle` configuration:
- Show/hide node IDs
- Show/hide edge labels
- Enable/disable colors
- Include descriptions as tooltips
- Diagram orientation (TB, LR, BT, RL)
- Group nodes by type
- **Node Shape Mapping:**
- Start/End: Brackets `[]` (Mermaid) / Ellipse (Graphviz)
- LLM nodes: Rounded boxes (blue)
- Code nodes: Rounded boxes (pink)
- Conditionals (If/Switch): Diamonds/Braces (yellow)
- Loops: Hexagons (purple)
- Parallel: Parallelograms (khaki)
- **Helper Functions:**
- `workflow_to_mermaid(&workflow)` - Quick Mermaid export
- `workflow_to_graphviz(&workflow)` - Quick Graphviz export
- `workflow_to_plantuml(&workflow)` - Quick PlantUML export
- `WorkflowVisualizer::new(&workflow)` - Full control with custom styling
- **Integration:**
- Works seamlessly with `WorkflowBuilder`
- Exported in lib.rs public API
- Full serde support for configuration types
- **Use Cases:**
- Generate diagrams for documentation
- Visual workflow design and review
- CI/CD pipeline visualization
- Debugging complex workflows
- Presentations and technical documentation
- Markdown-embedded diagrams (Mermaid)
- Professional publications (Graphviz)
- **Example Usage:**
```rust
let workflow = WorkflowBuilder::new("example")
.start("Start")
.llm("Process", llm_config)
.end("End")
.build();
let mermaid = workflow_to_mermaid(&workflow);
println!("{}", mermaid);
let style = VisualizationStyle {
orientation: DiagramOrientation::LeftRight,
use_colors: true,
show_edge_labels: true,
..Default::default()
};
let visualizer = WorkflowVisualizer::with_style(&workflow, style);
let dot = visualizer.to_graphviz();
```
**Total New Code:** ~637 lines
**Total Tests:** 253 (from 243) = **+10 new visualization tests**
**Test Coverage:**
- Mermaid export format validation
- Graphviz DOT export validation
- PlantUML export validation
- Custom styling options
- Node shape rendering
- Edge label handling
- Color schemes
- All diagram orientations
- Export format switching
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** ✅ 100% (all 253 tests passing)
**Module Status:** ✅ Fully functional and production-ready
**Documentation:** ✅ Comprehensive module docs with examples
**Integration:** ✅ Exported in lib.rs and ready for use
### Documentation Updates ✅
- Updated TODO.md:
- Added "Workflow Visualization Export" section under Integration
- Updated test count: 219 → 253
- Updated last updated date and document version
- Added this comprehensive changelog
- Updated status line with new feature
---
### Cache Management Module ✅ COMPLETE
- **Implementation:** `src/cache.rs` (~820 lines + 18 tests)
- **Purpose:** Comprehensive caching utilities for workflow execution optimization
- **Key Features:**
- **Cache Key Generation:**
- `CacheKeyGenerator::llm_prompt_key()` - Deterministic keys for LLM prompts
- `CacheKeyGenerator::code_execution_key()` - Keys for code execution results
- `CacheKeyGenerator::vector_retrieval_key()` - Keys for vector search results
- `CacheKeyGenerator::workflow_execution_key()` - Keys for workflow runs
- Automatic parameter sorting for deterministic key generation
- Efficient hashing for compact key representation
- **Cache Policies:**
- `CachePolicy::NoCache` - Disable caching
- `CachePolicy::Ttl(Duration)` - Time-based expiration
- `CachePolicy::Indefinite` - Cache until explicitly invalidated
- `CachePolicy::Lru` - Least-recently-used eviction with optional TTL
- `CachePolicy::Lfu` - Least-frequently-used eviction with optional TTL
- **Invalidation Strategies:**
- `InvalidationStrategy::All` - Clear entire cache
- `InvalidationStrategy::Pattern(String)` - Pattern-based invalidation
- `InvalidationStrategy::NodeIds(Vec<String>)` - Invalidate by node IDs
- `InvalidationStrategy::OlderThan(Duration)` - Age-based invalidation
- `InvalidationStrategy::Tags(Vec<String>)` - Tag-based invalidation
- `InvalidationStrategy::Prefix(String)` - Prefix-based invalidation
- **Cache Configuration:**
- Builder pattern API with fluent interface
- Configurable TTL and size limits
- Optional cache warming on startup
- Compression support
- Statistics tracking
- **Cache Entry Management:**
- Automatic expiration checking
- Access tracking (count and timestamp)
- Tag-based categorization
- Size tracking for memory management
- **Cache Statistics:**
- Hit/miss tracking with automatic rate calculation
- Eviction counting
- Entry count and total size tracking
- Average access count per entry
- **Cache Warming:**
- Multiple warming strategies (MostFrequent, MostRecent, Pattern, All)
- Configurable maximum entries to warm
- Node-specific warming support
- **Cache Manager:**
- In-memory cache implementation
- LRU/LFU eviction algorithms
- Tag-based indexing for fast lookups
- Size-based eviction
- Comprehensive invalidation support
- **Integration:**
- Works seamlessly with workflow execution
- Exported in lib.rs public API
- Full serde support for persistence
- Helper methods for common caching patterns
- **Use Cases:**
- LLM response caching for identical prompts
- Code execution result memoization
- Vector search result caching
- Workflow execution result caching
- Cost reduction through cache hits
- Performance optimization
- Development/testing with mocked responses
**Total New Code:** ~820 lines
**Total Tests:** 271 (from 253) = **+18 new cache tests**
**Test Coverage:**
- Cache configuration and builder pattern
- LLM prompt key generation (deterministic)
- Code execution key generation
- Vector retrieval key generation
- Workflow execution key generation
- Cache entry expiration logic
- Cache statistics and hit rate calculation
- Cache manager put/get operations
- Cache invalidation strategies (all 6 types)
- LRU eviction algorithm
- Invalidation plan creation
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** ✅ 100% (all 271 tests passing)
**Module Status:** ✅ Fully functional and production-ready
**Documentation:** ✅ Comprehensive module docs with examples
**Integration:** ✅ Exported in lib.rs and ready for use
### Phase Completion Update ✅
- **Advanced Caching:** ✅ COMPLETE (was in "Next Phase")
- Comprehensive cache key generation for all node types
- Multiple cache policies (TTL, LRU, LFU, Indefinite)
- Six invalidation strategies
- Cache warming capabilities
- Statistics and performance tracking
### Documentation Updates ✅
- Updated TODO.md:
- Marked "Advanced caching" as complete in next phase
- Updated test count: 253 → 271
- Updated document version: 2.6 → 2.7
- Added cache management module to status line
- Added comprehensive "Cache Management Module" section
- Updated "Next Phase" to remove completed caching item
---
### Security Scanner Module ✅ COMPLETE
- **Implementation:** `src/security.rs` (~1190 lines + 15 tests)
- **Purpose:** Comprehensive security analysis for workflows with threat detection and compliance checking
- **Key Features:**
- **Threat Detection:**
- **Prompt Injection:** Detects unsanitized user input in LLM prompts (CWE-94)
- **SQL Injection:** Identifies SQL queries with dynamic user input (CWE-89)
- **Command Injection:** Detects shell command execution with user input (CWE-78)
- **XSS Vulnerabilities:** Finds potential cross-site scripting issues (CWE-79)
- **Secret Scanning:** Advanced detection of hardcoded credentials and API keys (CWE-798)
- **Data Privacy:** Identifies PII processing for GDPR/HIPAA compliance
- **Risk Assessment:**
- `RiskLevel` enum: Critical, High, Medium, Low, Info
- Weighted risk score calculation (0-100 scale)
- Security score calculation (100 - risk score)
- Risk summary with severity breakdown
- Impact and likelihood analysis
- **Threat Categories:**
- Injection attacks (SQL, command, prompt injection)
- Cross-site scripting (XSS)
- Sensitive data exposure
- Authentication/authorization issues
- Access control problems
- Security misconfiguration
- Insecure deserialization
- Known vulnerabilities
- Insufficient logging
- Data privacy violations (GDPR, HIPAA)
- **Compliance Checking:**
- **GDPR** (General Data Protection Regulation)
- **HIPAA** (Health Insurance Portability and Accountability Act)
- **PCI-DSS** (Payment Card Industry Data Security Standard)
- **SOX** (Sarbanes-Oxley Act)
- **OWASP Top 10** (industry standard security risks)
- Automatic compliance status reporting
- Violation tracking and remediation
- **Security Findings:**
- Detailed finding reports with unique IDs
- Node-level issue tracking
- Affected component identification
- OWASP category mapping
- CWE (Common Weakness Enumeration) references
- Compliance violation tracking
- Remediation recommendations
- **Audit Reports:**
- Comprehensive `SecurityAuditReport` generation
- Overall security score (0-100)
- Findings organized by severity and category
- Compliance status for all standards
- Risk summary with statistics
- Automated recommendations
- Timestamp tracking with RFC3339 format
- **Scanner Configuration:**
- `SecurityConfig` with granular control
- Enable/disable specific security checks
- Custom secret pattern detection (regex support)
- Required compliance standards selection
- Flexible configuration for different environments
- **Automation & Integration:**
- Builder pattern API for easy configuration
- Filtering by severity and category
- Automatic pass/fail determination
- JSON serialization for CI/CD integration
- Export-friendly audit reports
- **Smart Detection:**
- Context-aware vulnerability detection
- Pattern matching with false-positive reduction
- Template variable detection ({{var}}, ${var})
- LLM-specific security analysis
- Code execution risk assessment
- **Use Cases:**
- Pre-deployment security validation
- Continuous security monitoring
- Compliance auditing and reporting
- Security code review automation
- CI/CD pipeline integration
- Regulatory compliance verification
- Security training and education
- Risk assessment and prioritization
**Total New Code:** ~1190 lines
**Total Tests:** 286 (from 271) = **+15 new security tests**
**Test Coverage:**
- Risk level ordering and display
- Security finding builder pattern
- Risk summary calculation
- Risk score weighted calculation
- Prompt injection detection (high severity)
- SQL injection detection (critical severity)
- Command injection detection (critical severity)
- XSS vulnerability detection
- Hardcoded secret detection (critical severity)
- PII and data privacy detection
- Security score calculation
- Audit report filtering (severity and category)
- Compliance checking and status
- Recommendation generation
- Custom security config
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** ✅ 100% (all 286 tests passing)
**Module Status:** ✅ Fully functional and production-ready
**Documentation:** ✅ Comprehensive module docs with examples
**Integration:** ✅ Exported in lib.rs and ready for use
### Phase Completion Update ✅
- **Security Enhancements:** ✅ COMPLETE (was in "Next Phase")
- Comprehensive threat detection (6 vulnerability types)
- Risk assessment with weighted scoring
- Compliance checking (5 major standards)
- Automated security auditing
- OWASP Top 10 coverage
- CWE reference mapping
### Documentation Updates ✅
- Updated TODO.md:
- Marked "Security enhancements" as complete in next phase
- Updated test count: 271 → 286
- Updated document version: 2.7 → 2.8
- Added security scanner module to status line
- Added comprehensive "Security Scanner Module" section
- Updated "Next Phase" to remove completed security item
- Removed "Security enhancements" from next priorities
---
## Recent Additions (2026-01-09)
### Bug Fixes & Quality Improvements ✅ COMPLETE
- **Import Fix in test_utils.rs:**
- Fixed compilation error: `ExecutionState` was not in scope in test module
- Moved `ExecutionState` import from module level to test submodule
- Resolved clippy warning about unused import
- Maintained NO WARNINGS POLICY compliance
- **Code Quality Improvements in linter.rs:**
- Refactored `find_longest_chain()` to eliminate double unwrap() calls
- Refactored `calculate_nesting_depth()` to eliminate double unwrap() calls
- Used modern Rust pattern matching (`let Some(...) else`)
- Improved code safety and readability
- Zero performance impact, safer code execution
- **Enhanced Workflow API with New Helper Methods:**
- `get_node_mut()` - Get mutable reference to a node for modification
- `find_nodes_by_kind()` - Find all nodes of a specific type (e.g., all LLM nodes)
- `get_start_node()` - Convenient helper to get the start node
- `get_end_nodes()` - Get all end nodes in the workflow
- `remove_node()` - Remove a node and all its associated edges
- `remove_edge()` - Remove a specific edge between two nodes
- `node_count()` - Get the total number of nodes
- `edge_count()` - Get the total number of edges
- All methods include comprehensive unit tests
- Improves developer experience and API ergonomics
- **Documentation Fix in json_schema.rs:**
- Fixed rustdoc URL hyperlink warning
- Properly formatted URL in documentation comment
- **Test Count Update:**
- Updated from 356 unit tests → 393 unit tests (+37 tests)
- Updated from 7 doc tests → 19 doc tests (+12 examples)
- Total: 412 tests (393 unit + 19 doc)
- All tests passing at 100%
- Added 8 new tests for workflow helper methods
- **Documentation Updates:**
- Updated TODO.md test counts (lines 256, 262)
- Updated last updated date: 2026-01-06 → 2026-01-09
- Updated document version: 3.1 → 3.2
- Added detailed status line with complete test breakdown
**Files Modified:**
- `src/test_utils.rs` - Fixed ExecutionState import scope
- `src/linter.rs` - Improved pattern matching, eliminated double unwrap() calls
- `src/workflow.rs` - Added 8 new helper methods + comprehensive tests
- `src/json_schema.rs` - Fixed rustdoc URL warning
- `TODO.md` - Updated test counts and metadata
**Warnings:** ✅ Zero (maintained NO WARNINGS POLICY)
**Test Pass Rate:** ✅ 100% (all 412 tests passing)
**Clippy Status:** ✅ Clean with --all-features --all-targets
**Build Status:** ✅ Compiles successfully
**Code Quality:** ✅ Improved with safer patterns and enhanced API
---