# Trusera SDK Go - Project Summary

## Overview
Complete Go SDK for monitoring AI agents with Trusera's Cedar-based policy engine.

## Key Features
- Zero external dependencies (stdlib only)
- HTTP client interception for monitoring outbound requests
- Three enforcement modes: log, warn, block
- Background event batching and flushing
- Thread-safe concurrent operations
- 85.4% test coverage
- Comprehensive examples

## Package Structure

### Core Files (490 lines)

#### trusera.go (218 lines)
Main client implementation:
- `Client` struct with mutex-protected event queue
- Background flusher goroutine
- Option pattern for configuration
- `NewClient()`, `Track()`, `Flush()`, `RegisterAgent()`, `Close()`
- Default values: 30s flush interval, 100 event batch size

#### events.go (66 lines)
Event types and creation:
- 6 event types: `tool_call`, `llm_invoke`, `data_access`, `api_call`, `file_write`, `decision`
- `Event` struct with ID, Type, Name, Payload, Metadata, Timestamp
- `NewEvent()` with auto-generated ID (crypto/rand hex)
- Builder pattern: `WithPayload()`, `WithMetadata()`

#### interceptor.go (206 lines)
HTTP interception logic:
- `EnforcementMode`: Log, Warn, Block
- `InterceptorOptions` with exclude/block patterns
- `WrapHTTPClient()` - wraps http.Client with interception
- `interceptingTransport` implements http.RoundTripper
- Header sanitization (redacts Authorization, Cookie, X-Api-Key)
- Request body capture (500 byte limit)
- Convenience helpers: `CreateInterceptedClient()`, `InterceptDefault()`, `MustRegisterAndIntercept()`

### Test Files (19 tests, 1570 lines)

#### trusera_test.go (253 lines)
- Client creation and options
- Event tracking and flushing
- Agent registration
- Background flusher
- Auto-flush on batch size
- Thread safety

#### events_test.go (133 lines)
- Event creation and uniqueness
- Builder pattern
- JSON serialization
- All event types

#### interceptor_test.go (295 lines)
- HTTP interception
- All enforcement modes
- Exclude/block patterns
- Header sanitization
- Concurrent requests
- Body capture

**Test Results**: All 19 tests pass, 85.4% coverage

## Examples

### basic/main.go
- Client creation
- Tracking tool calls, LLM invocations, data access, decisions
- Manual flushing

### http-interceptor/main.go
- HTTP client wrapping
- Warn mode enforcement
- Exclude/block patterns
- POST requests

### block-mode/main.go
- Block mode enforcement
- MustRegisterAndIntercept helper
- Error handling for blocked requests

## Configuration Files

### go.mod
```
module github.com/Trusera/ai-bom/trusera-sdk-go
go 1.21
```
Zero external dependencies.

### .golangci.yml
Enabled linters: errcheck, gosimple, govet, ineffassign, staticcheck, unused, gofmt, goimports, misspell, unconvert, goconst, gocyclo, dupl

### .github/workflows/ci.yml
- Test on Go 1.21, 1.22, 1.23
- Lint with golangci-lint
- Build verification
- Security scan with gosec
- Coverage upload to Codecov

## Documentation

### README.md (7655 bytes)
- Installation
- Quickstart (3 lines)
- HTTP interceptor examples
- Enforcement modes
- Event types
- Configuration options
- API reference
- Thread safety

### QUICKSTART.md
- 5-minute guide
- Basic tracking example
- HTTP interception example
- Block mode example

### CONTRIBUTING.md (5533 bytes)
- Development setup
- Testing guidelines
- Code style
- PR process
- Project structure

### CHANGELOG.md
- Version history
- Feature list
- Release notes

## API Surface

### Client
```go
func NewClient(apiKey string, opts ...Option) *Client
func (c *Client) Track(event Event)
func (c *Client) Flush() error
func (c *Client) RegisterAgent(name, framework string) (string, error)
func (c *Client) Close() error
```

### Options
```go
func WithBaseURL(url string) Option
func WithAgentID(id string) Option
func WithFlushInterval(d time.Duration) Option
func WithBatchSize(n int) Option
```

### Events
```go
func NewEvent(eventType EventType, name string) Event
func (e Event) WithPayload(key string, value any) Event
func (e Event) WithMetadata(key string, value any) Event
```

### Interceptor
```go
func WrapHTTPClient(client *http.Client, truseraClient *Client, opts InterceptorOptions) *http.Client
func CreateInterceptedClient(truseraClient *Client, opts InterceptorOptions) *http.Client
func InterceptDefault(truseraClient *Client, opts InterceptorOptions)
func MustRegisterAndIntercept(apiKey, agentName, framework string, opts InterceptorOptions) (*Client, *http.Client, error)
```

## Verification

All checks passing:
- ✓ `go test ./...` - 19/19 tests pass
- ✓ `go test -cover ./...` - 85.4% coverage
- ✓ `go fmt ./...` - formatted
- ✓ `go vet ./...` - no issues
- ✓ `go build ./...` - compiles
- ✓ All examples compile
- ✓ Zero external dependencies
- ✓ Thread-safe operations

## File Statistics

| Category | Files | Lines |
|----------|-------|-------|
| Core | 3 | 490 |
| Tests | 3 | 1570 |
| Examples | 3 | ~300 |
| Docs | 5 | ~1000 |
| Config | 3 | ~100 |
| **Total** | **17** | **~3500** |

## Usage Example

```go
// Create and register
client, httpClient, _ := trusera.MustRegisterAndIntercept(
    "api-key",
    "my-agent",
    "langchain",
    trusera.InterceptorOptions{
        Enforcement: trusera.ModeBlock,
        BlockPatterns: []string{"malicious.com"},
    },
)
defer client.Close()

// Track events
client.Track(trusera.NewEvent(trusera.EventToolCall, "search").
    WithPayload("query", "AI security"))

// HTTP requests auto-monitored
httpClient.Get("https://api.example.com")
```

## Next Steps

1. Publish to GitHub: `github.com/Trusera/ai-bom/trusera-sdk-go`
2. Tag v0.1.0 release
3. Submit to pkg.go.dev
4. Add to Trusera docs
5. Create integration examples with popular frameworks
