Everything you need to build with agents.
XR is a runtime: a shell, a skill layer, a model router, and a policy gate — all working together.
Agentic Runtime
A performant, sandboxed runtime that plans, executes, and iterates — with deterministic replays and full audit trails.
Native Shell
XR lives inside your terminal. Native commands, pipes, and a ~36 ms cold start (measured p95). No browser required.
Editor Agnostic
A bundled VS Code extension, and a CLI that runs in any terminal. Your agent, every surface.
Skill Graph
Compose the bundled skills into pipelines. Each skill is manifest-declared and permission-scoped.
Any Model
Open-weight to frontier — GPT-5, Claude Opus, Gemini, DeepSeek, Qwen, Llama, Groq. Route by cost, latency, or task.
Security by Default
Capability-based security, human-in-the-loop confirmations, signed skills, and a hash-chained audit log.
Reproducible Workflows
Every run is a replayable trace. Share sessions, diff executions, and roll agents back like code.
MCP Native
An MCP client with a signed, default-deny allowlist. Grant exact commands and network access per server.
Blazing Fast
TypeScript on Bun. Streaming by default. Local models keep tool calls on your machine.
Planning & reasoning
Multi-step planning with explicit reasoning traces you can inspect, replay, and diff.
Multi-agent orchestration
Compose specialist agents — researcher, coder, reviewer — with typed handoffs.
Replay & time travel
Every run is a trace. Rewind, fork, and resume sessions like git branches.
Shareable sessions
Send a link to a run and anyone can inspect every tool call, diff, and decision.
Observation hooks
Stream events to OpenTelemetry, Datadog, Honeycomb, or your own endpoint.
MCP servers
Drop in any Model Context Protocol server. XR adds typing, state, and capabilities.
Secret management
Encrypted vault, per-skill scoping, and just-in-time approval for sensitive operations.
Parallel tool calls
Fan out independent calls concurrently. XR schedules, cancels, and retries automatically.
Triggers & cron
Run agents on schedule, on webhooks, or when files change — locally or in the cloud.
A shell you'll actually live in.
XR is not a web app pretending to be a terminal. It is a real terminal that runs alongside your existing tools. Bash, zsh, fish, nushell — wrap them or run XR directly.
- Real pipes and redirection
- Sub-10ms cold start
- Native SSH & tmux support
- Rich inline widgets
The smartest model router.
XR picks the right model for each step — cheap & fast for parsing, frontier for reasoning — and falls back gracefully. Route by cost, latency, or policy.
- Model-agnostic tool protocol
- Local & remote in one graph
- Cost & latency budgets
- Fine-grained fallbacks
Skills, not prompts.
Skills are typed, versioned, signed, and capability-scoped units of work. Compose them like functions. Publish to the marketplace. Ship with confidence.
- Schema-validated I/O
- Semantic versioning
- Signed & verified
- Per-skill permissions
Try XR for yourself.
Free for individuals. No credit card. Works locally in under a minute.