Skip to content

Tiller: agent-harness surface for harness engineers running a coding agent on their own machine. System crafted lean with subtle-micro motion. 9 sections built from 6 declared capabilities. Everything declared as tokens so the page can be re-themed, not rewritten

Tiller Start a local session
SESSION Tiller LOCAL

Tiller

harness engineers running a coding agent on their own machine

The session that names its finish before the first tool runs

User, agent, and tool turns accumulate as T01–Tn on one session. A turn is not a product stage.

Start a local session
Tiller tool permitPERMITONE PENDING TOOLTOOLShellCOMMANDpnpm typecheckPATHS./session/turns./permit/scopeBLAST RADIUSlocal write · network hold until AllowALLOW ONCEDENYLOCAL · Tiller
Tiller — illustrative

The permits

Permits a local session actually keeps.

Each turn is a session beat — not a workflow approve stamp dressed as trust.

Turn tape01Tool permit02Steer pin03Mid-run redirect04
How Tiller is put together
  1. 01

    Turn tape

  2. 02

    Tool permit

  3. 03

    Steer pin

  4. 04

    Mid-run redirect

Permit legend

How Tiller permits a local tool.

Tool name, local command, paths, and blast radius — the permit drawn rather than claimed.

  1. Turn tape
  2. Tool permit
  3. Steer pin
  4. Mid-run redirect
100 70 40 10 -20 Turn tape Tool permit Steer pin Mid-run redirect 01 02 03 04 cost · cumulative
Read the permit that waits before the tool runs.

Tiller permit field.

Turn tape01Tool permit02Steer pin03Mid-run redirect04
  1. Turn tape
  2. Tool permit
  3. Steer pin
  4. Mid-run redirect
Chapters5 beats · editorial order

Turn notes

How a local session actually finishes.

Turn tape, tool permits, and the finish checks that keep a session honest.

  1. T01

    Turn tape

  2. T02

    Tool permit

  3. T03

    Steer pin

  4. T04

    Mid-run redirect

  5. T05

    Eval close

Before you ask

Questions harness engineers running a coding agent on their own machine ask first.

Who is Tiller for?

Harness engineers running a coding agent on their own machine. The 6 capabilities on this page are the whole product; there is no hidden tier.

Is local session available from day one?

Yes. All 6 capabilities ship together — nothing on this page is staged behind a later phase.

How long does it take to see something real?

One session: we run it on your data rather than on a prepared sandbox.

What is deliberately not here?

Anything Tiller does not do yet. This page lists capabilities, not intentions.

Can we cancel or pause without a long contract?

Yes — start on a reversible path. Cancel anytime; nothing here requires an annual lock to try.

What happens if we hit a limit?

The comparison table spells the declared capability set. Crossing a lane means adding the next named capability — not an opaque overage.

Do we need turn tape before the rest is useful?

Turn tape is the usual first step for harness engineers running a coding agent on their own machine, but every capability on this page is available without unlocking a secret tier.

Who do we talk to if procurement has questions?

Use the same primary path on this page — a human answers scope, security, and sequencing without a separate maze.

Session

Start the next Tiller session.

Turn marks, tool permits, and the finish checks a harness engineer actually runs.

Start a local session Read the permit