Agent Harbor

Sandboxed execution environment and orchestration layer for AI coding agents.

Agent Harbor lets you run AI coding agents (Claude, Gemini, Codex, Copilot, Cursor) safely in isolated environments. Without it, agents can access sensitive files, make unintended changes, or conflict when run in parallel. Agent Harbor gives you a purpose-built execution layer: copy-on-write filesystem, time-travel debugging, and full session recording so you can let agents run for hours on real tasks.

You get a TUI for interactive task and session management, a CLI for automation and CI, and support for AgentFS, ZFS, and Btrfs snapshot providers. For supported agents, terminals, quick start, and filesystem options, see Under the hood.

TUI at a glance

The interactive TUI is the main way to manage tasks and sessions. Launch it with ah and create tasks, watch runs, and replay sessions from one place.

Core features

Five pillars of Agent Harbor: sandboxing, anti-halting, multi-OS workflows, time travel, and recording. Pick a card to dive deeper.

• Parallel orchestration without infrastructure drag

  Coordinate many local agents at once with 10x faster setup than git worktrees. Keep disk usage low while you fork agents, compare outcomes side by side, and converge on the best path.
• Anti-halting keeps parallel runs moving

  When one branch fails, supervisors detect it, rollback automatically, and keep the broader workflow progressing. Self-healing agents with targeted web research recover without manual babysitting.
• Built for production-grade orchestration

  Run leader-follower pipelines where agents execute test suites and validate patches on every operating system in parallel. Every task, command, and transcript is recorded for later review, debugging, and compliance.
• Time travel & forking

  Rewind to any point in an agent's session and branch off. Filesystem snapshots at logical boundaries, visual replay of terminal output, and compare different execution paths. Works with ZFS, Btrfs, or cross-platform AgentFS.
• Recording & replay

  Every session is captured for later analysis: full PTY stream with exact timing, snapshot markers for navigation, Brotli compression for efficient storage. Extract branch points for intervention.