Singularity CLI

This entire project — every line of code, every test, this very README — was written by Claude Code. No humans were mass-unemployed in the making of this CLI. Your job is safe. Probably.

A command-line interface for the Singularity task manager, built in Rust.

Why?

This CLI is built primarily for AI agents. Singularity offers an MCP server, but MCP tool definitions, schemas, and JSON responses consume a significant chunk of the agent's context window. A CLI call like singularity task list --project-id P-xxx is a single line in, a compact table out — orders of magnitude fewer tokens than an equivalent MCP round-trip with its full schema overhead.

Agents can discover available commands and flags via --help without loading any schema into context. The CLI ships with a Claude Code skill file — drop it into your project and your agent can immediately manage tasks through the Singularity API.

It works great for humans too, of course.

Agent Setup

1. Install: cargo install singularity-cli
2. Run singularity setup to configure API token and timezone (or singularity config set-token <TOKEN> + singularity config set-timezone Europe/Kyiv)
3. Copy .claude/skills/singularity.md to your project's .claude/skills/ directory
4. Your agent can now run commands like singularity task create "Fix bug" --priority high

Use --json on any command for machine-readable output that agents can parse programmatically.

Installation

cargo install singularity-cli

Or build from source:

git clone https://github.com/igor-gorohovsky/SingularityCLI.git
cd SingularityCLI
cargo build --release
# binary is at ./target/release/singularity

Quick Start

# Interactive setup (API token + timezone)
singularity setup

# List your projects
singularity project list

# Create a task
singularity task create "Review PR" --priority high --project-id P-xxx

# Today's tasks
singularity task list today

# This week's tasks
singularity task list week

# Complete a task
singularity task done T-xxx

Configuration

Run singularity setup for interactive configuration of API token and timezone.

Authentication

Two options, env var takes precedence:

Timezone

The API stores all dates in UTC. Configure your timezone so the CLI correctly converts date filters and displays:

singularity config set-timezone Europe/Kyiv

Without a timezone configured, dates are treated as UTC. With a timezone, bare date filters like --start-from 2026-02-28 are converted to the correct UTC boundaries for your local time.

Commands

Projects

singularity project list [--max-count N] [--offset N] [--include-removed] [--include-archived]
singularity project get <P-uuid>
singularity project create --title "My Project" [--note "..."] [--parent P-uuid] [--color "#FF0000"] [--emoji "..."] [--start DATE] [--end DATE] [--notebook]
singularity project update <P-uuid> [--title "..."] [--note "..."] [--color "..."] ...
singularity project delete <P-uuid>

Tasks

singularity task list [today|tomorrow|yesterday|week|month] [--project-id P-uuid] [--parent T-uuid] [--start-from DATE] [--start-to DATE] [--max-count N] [--offset N] [--include-removed] [--include-archived]
singularity task get <T-uuid>
singularity task create "My Task" [--priority high|normal|low] [--project-id P-uuid] [--deadline DATE] [--tags tag1,tag2] ...
singularity task update <T-uuid> [--checked empty|checked|cancelled] [--priority high|normal|low] [--title "..."] ...
singularity task done <T-uuid>
singularity task cancel <T-uuid>
singularity task reopen <T-uuid>
singularity task delete <T-uuid>

Task Groups

singularity task-group list [--parent P-uuid] [--max-count N] [--offset N] [--include-removed]
singularity task-group get <Q-uuid>
singularity task-group create --title "Sprint 1" --parent <P-uuid> [--order 1.0]
singularity task-group update <Q-uuid> [--title "..."] [--parent P-uuid] [--order 2.0]
singularity task-group delete <Q-uuid>

Tags

singularity tag list [--parent <tag-id>] [--max-count N] [--offset N] [--include-removed]
singularity tag get <tag-id>
singularity tag create --title "urgent" [--parent <tag-id>] [--order 1.0]
singularity tag update <tag-id> [--title "..."] [--parent <tag-id>] [--order 2.0]
singularity tag delete <tag-id>

Output Formats

By default, list commands output markdown-style bullets:

- ID: T-abc
  Task: Review PR
  Priority: high
  Checked: empty
- ID: T-def
  Task: Write tests
  Priority: normal
  Checked: checked

Use --json on any command for machine-readable JSON output:

singularity --json task list --project-id P-xxx

ID Formats

Singularity uses prefixed UUIDs for entity identification:

Development

# Run tests
cargo test

# Lint
cargo clippy -- -D warnings

# Format
cargo fmt

License

Apache-2.0 - see LICENSE for details.