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Desktop + TUI coding agent

Repository work,
on your surface.

Give Sigil a goal, review its plan, follow parallel work, and decide what happens next from Desktop or terminal.

Early preview Desktop and TUI are coequal product surfaces. The public macOS Desktop beta is signed and Apple-notarized for Apple Silicon and Intel; the matching TUI preview uses npm's beta tag. Review current support and the changelog before adopting Sigil.
Install Visual tour Read the docs
sigil
/task audit the release docs
  1. goal Refresh release docs, site, and screenshots received
  2. plan Four bounded steps with one final check accepted
  3. parallel Docs and product captures update independently 2 active
  4. verify Pages layout and links are healthy passed
  5. result Documentation is ready to publish ready
work saved plan and changes reviewed checks passed

Desktop + TUI demos

Choose the surface that fits the work.

The Desktop tour uses real application captures. The TUI recording shows a real repository edit from request through approval, verification, and session recovery.

Quickstart

Download Desktop or install the terminal app.

Desktop beta · macOS

Signed and Apple-notarized DMG

Apple Silicon Intel
When the beta manifest is available these buttons resolve directly to its signed, notarized, and stapled DMGs; otherwise they open Releases.
TUI beta

npm

npm install -g @sigil-ai/sigil@beta
What changed

Beta release notes

Check fixes, supported surfaces, and update instructions before installing.

Read the changelog →
1

Start

cd /path/to/your/project
sigil
2

Set up

Quick Setup opens when configuration is missing. Choose a provider and model, then add authentication. See Installation for every supported package path.

Visual tour

See the work and the decision points.

Sigil Desktop workbench with plan, tool activity, and approval Desktop workbench Sigil Desktop settings Desktop settings Sigil TUI AI-planned task execution screenshot TUI planned task execution

Why Sigil feels different

The important parts stay visible while the agent works.

Plan before execution

Turn a goal into reviewable work

Sigil generates visible steps, runs independent work in parallel, and brings the result to a verification checkpoint without hiding the decisions in logs.

  • Accepted plan stays visible
  • Parallel steps remain inspectable

Decide before action

Pause before risky work

Before an action runs, Sigil separates detected effects from policy, shows its targets and execution limits, then asks only when an exact decision is required.

  • Effects, targets, and containment
  • Exact one-time or bounded session decision

Return with confidence

Come back without losing the thread

Saved sessions preserve the conversation and tool history. Interrupted work is recorded honestly instead of being silently rerun.

  • Conversation and task state
  • Interrupted tools stay interrupted

Fit the repository

Bring the model and tools you need

Choose a supported model service, connect MCP tools, and add repository-aware code intelligence without changing how work is reviewed.

  • Five model integrations
  • MCP and code intelligence

Safety model

Keep control where a decision matters.

Different actions have different limits. The Safety guide explains what to inspect before deciding; Permissions and sandbox covers the exact controls and platform boundaries.

Documentation

Open the guide that matches the job.

Quickstart Install, launch, complete setup, run diagnostics, and make the first safe edit. Workflows Follow practical checkpoints for exploring, editing, debugging, reviewing, and resuming work. Config Find the right page for model services, permissions, appearance, or advanced settings. Troubleshooting Fix common issues, preview a private support report, and open a structured bug form.