feat(harness): Complete Agentic Harness Implementation (Phases 1-6)#92
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- Add ExecutionContext with SessionID, WorkflowRunID, AgentRunID - Add ResolveWorkspacePath() for workspace isolation - Add git/cloner.go for runtime repo cloning - Add collaboration modes (sequential vs parallel) - Update PRD with design decisions: - Sequential mode: agents pick up where previous left off (same branch) - Parallel mode: each agent gets own branch, merge later - Session locking for sequential concurrent access - Explicit session lifecycle management
- Add session CLI commands (list, info, delete, cleanup, unlock) - Integrate streaming into AgenticExecutor with full ownership identifiers - Add StreamingConfig and wire publishers through execution engine - Add session manager for workspace persistence and locking - Add stream publisher tests and NATS publisher implementation Phase 2 complete: - 2.1 Workspace Isolation ✅ - 2.2 Session Manager ✅ - 2.3 Git Cloner ✅ - 2.4 NATS State Store ✅ - 2.5 Session CLI Commands ✅ - 2.6 Streaming Integration ✅
…mplete Phase 2 complete: - Session manager with locking - Real-time streaming with ownership identifiers - Session CLI commands (list, info, delete, cleanup, unlock) - Git cloner for repo targeting Phase 3 planned: - Sandbox isolation strategies (Docker, Firecracker, gVisor, WASM) - Resource limits (CPU, memory, disk) - Network filtering - Filesystem ACLs
- Add Sandbox interface with Create, Exec, ReadFile, WriteFile, etc. - Add SandboxConfig with Mode, Resources, Network, Filesystem settings - Implement HostSandbox (passthrough, no isolation) - Implement DockerSandbox with container isolation: - Resource limits (CPU, memory, PIDs) - Network isolation (--network none by default) - Read-only root filesystem - Dropped capabilities - Security options (no-new-privileges) - Add Factory for creating sandbox instances by mode - Add comprehensive tests for HostSandbox Supported modes: host, docker (firecracker, gvisor, wasm planned)
Phase 4 - Session Management: - pkg/harness/session/session_executor.go - SessionExecutor with lifecycle mgmt - pkg/harness/session/history_store.go - JSON persistence for message history - Session locking, metadata tracking, and resume capability Phase 5 - Session Persistence: - WithInitialHistory executor option for loading prior conversation - Automatic message persistence after each execution - Session resume via --session <id> flag Phase 6 - Interactive REPL: - cmd/main/harness_repl.go - Full REPL with session persistence integration - Commands: /help, /status, /history, /clear, /skills, /memory, /tools, etc. - JSON export/import of session state - Integration with HistoryStore for message persistence across sessions Also includes: - Sandbox isolation improvements (docker cp for file operations) - Compaction with token counting and history truncation - Tool registry with sandbox-aware execution - E2E tests for multi-step execution and workflow simulation - Documentation updates for testing operations
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Summary
This PR implements the complete Agentic Harness system for Station, enabling long-running AI agent execution with:
Key Features
pkg/harness/- Complete harness execution enginepkg/harness/session/- Session management with history persistencepkg/harness/sandbox/- Docker, E2B, and host sandbox backendspkg/harness/tools/- Bash, Read, Write, Edit, Glob, Grep toolscmd/main/harness_repl.go- Interactive REPL with/history,/clear,/statuscommandscmd/main/session_commands.go- Session management CLI commandsTest Plan
go test ./pkg/harness/... -vgo test ./pkg/harness/session/... -vstn harness --helpstn session --helpNotes
This branch has diverged from main and may require manual conflict resolution during merge.
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