See what your agents are doing
No black boxes. Every terminal prompt, source code lookup, and tool invocation is rendered in real-time. Know exactly what your agents are exploring.
The agentic IDE that gets better every time you use it.
Built around the Pi coding agent. Every task gets its own workspace, every decision lands in a living spec, every workflow becomes a reusable skill.
Quick start
Install ThinkRail
Apple Silicon
Windows x64
Ubuntu 24.04+ · run ./installer
Open your project
Launch ThinkRail and choose a Git repository.
Start working
Create isolated Git worktrees and start agent sessions.
JetBrains InnovationHubApache-2.0open source
Agent session
this demo is interactive
Message the agent… (@ files · / commands · Enter to send)
Foundational principles
Designed to compound
Most agents forget everything between sessions. ThinkRail remembers — and what it learns today makes it faster tomorrow.
Plan first — keep the plan
Agents draft a plan before touching code. Approved designs land in living specs and stay with the project.
Run multiple agents without the mess
Each task runs inside its own isolated Git worktree. Run five distinct features in parallel without dealing with lock files, dirty indexes, or branch switching.
Living specs, not stale docs
Requirements, boundaries, and decisions in a linked graph the agent reads before every change — and updates as the code evolves.
Capabilities
Complete engine overview
[ 01 ]
Living specs
Specs the agent keeps current — read before every change, updated with every decision.
[ 02 ]
Parallel workspaces
Separate Git worktrees keep concurrent tasks from editing the same checkout.
[ 03 ]
Live change stream
Interactive diff view tracking every modified source file instantly.
[ 04 ]
Interactive questions
Agents pause and prompt you when requirements lack clarity.
[ 05 ]
Reusable skills
Teach a workflow once. The agent runs it the same way every time.
[ 06 ]
Per-session model choice
Choose the provider model and thinking level that fit each coding session.
[ 07 ]
Extensionscoming soon
Next: ThinkRail builds the tools it needs from how you actually work.
Parallel workspace map
main
Project sharing · approved plan
agent-01
Read API spec
Inspect existing routes
Implement endpoint
Run tests
pr-01agent-02
Read UI spec
Inspect components
Build share dialog
Polish states
pr-02agent-03
Inspect current copy
Draft empty state
Waiting for input
Apply user choice
pr-033 agents · 3 isolated worktrees · one repository
01 / Development strategy
Living specs.
Requirements, boundaries, and expected outcomes go into the spec graph before any code. The design stays with the project — checked before every change, never left to rot.
$ cat specs/payment-integration.md ## Requirements - Integrate Stripe Elements checkout flow - Handle synchronous webhook signature verification - Ensure robust token rotation logging ✓ Spec validation passed. Ready to spawn agent.
02 / Isolation environment
Parallel workspaces.
No more switching branches back and forth. ThinkRail uses local Git worktrees so concurrent tasks can work in separate directories and branches without sharing a dirty index or overwriting one another's files.
$ git worktree list /Users/thinkrail/dev/app d4c55b6 [main] /Users/thinkrail/dev/app-auth-fix 7b4aef9 [auth-jwt-fix] /Users/thinkrail/dev/app-tests-refactor da4c55b [tests-refactor] Running 3 environments in parallel. No index contamination.
Next step
Stop starting from zero.
Every session leaves your project smarter — decisions in specs, workflows in skills. Download ThinkRail and let it learn.