SpacetimeDB CLI Skill | Agent Skills

SpacetimeDB CLI

Use this skill when the user needs help with the spacetime CLI tool - initializing projects, building modules, publishing databases, querying data, managing servers, or troubleshooting CLI issues.

Quick Reference

Project Initialization & Development

# Initialize new project
spacetime init my-project --lang rust|csharp|typescript
spacetime init my-project --template <template-id>

# Build module
spacetime build                    # release build
spacetime build --debug            # faster iteration, slower runtime

# Dev mode (auto-rebuild, auto-publish, generates bindings)
spacetime dev
spacetime dev --client-lang typescript --module-bindings-path ./client/src/module_bindings

# Generate client bindings
spacetime generate --lang typescript|csharp|rust|unrealcpp --out-dir ./bindings

Publishing & Deployment

# Publish to Maincloud (default)
spacetime publish my-database --yes

# Publish to local server
spacetime publish my-database --server local --yes

# Publish with data handling
spacetime publish my-database --delete-data always      # always clear data
spacetime publish my-database --delete-data on-conflict # clear only if schema conflicts
spacetime publish my-database --delete-data never       # never clear (default)

# Allow breaking client changes
spacetime publish my-database --break-clients

Database Interaction

# SQL queries
spacetime sql my-database "SELECT * FROM users"
spacetime sql my-database --interactive   # REPL mode

# Call reducers
spacetime call my-database my_reducer '{"arg1": "value", "arg2": 123}'

# Subscribe to changes
spacetime subscribe my-database "SELECT * FROM users" --num-updates 10

# View logs
spacetime logs my-database -f              # follow logs
spacetime logs my-database -n 100          # last 100 lines

# Describe schema
spacetime describe my-database --json
spacetime describe my-database table users --json
spacetime describe my-database reducer my_reducer --json

Database Management

# List databases
spacetime list

# Delete database
spacetime delete my-database

# Rename database
spacetime rename <database-identity> --to new-name

Server Management

# List configured servers
spacetime server list

# Add server
spacetime server add local http://localhost:3000 --default
spacetime server add myserver https://my-spacetime.example.com

# Set default server
spacetime server set-default local

# Test connectivity
spacetime server ping local

# Start local instance
spacetime start

# Clear local data
spacetime server clear

Authentication

# Login (opens browser)
spacetime login

# Login with token
spacetime login --token <token>

# Show login status
spacetime login show

# Logout
spacetime logout

Energy/Billing

spacetime energy balance
spacetime energy balance --identity <identity>

Default Servers

| Name | URL | Description | |------|-----|-------------| | maincloud | https://spacetimedb.com | Production cloud (default) | | local | http://127.0.0.1:3000 | Local development server |

Common Workflows

New Project Setup

# 1. Login
spacetime login

# 2. Create project
spacetime init my-game --lang rust
cd my-game

# 3. Start dev mode (auto-rebuilds and publishes)
spacetime dev

Local Development

# Start local server (in separate terminal)
spacetime start

# Publish to local
spacetime publish my-db --server local --delete-data always --yes

# Query local database
spacetime sql my-db --server local "SELECT * FROM players"

Generate Client Bindings

# After building module
spacetime build
spacetime generate --lang typescript --out-dir ./client/src/bindings

# Or use dev mode which auto-generates
spacetime dev --client-lang typescript --module-bindings-path ./client/src/bindings

Common Flags

| Flag | Short | Description | |------|-------|-------------| | --server | -s | Target server (nickname, hostname, or URL) | | --yes | -y | Non-interactive mode (skip confirmations) | | --anonymous | | Use anonymous identity | | --identity | -i | Specify identity to use | | --project-path | -p | Path to module project |

Troubleshooting

"Not logged in"

spacetime login
# Or use --anonymous for public operations

"Server not responding"

spacetime server ping <server>
# For local: ensure spacetime start is running

"Schema conflict"

# Clear data and republish
spacetime publish my-db --delete-data always --yes

"Build failed"

# Check Rust/C# toolchain
rustup show
# For Rust modules, ensure wasm32-unknown-unknown target
rustup target add wasm32-unknown-unknown

Module Languages

Server-side (modules): Rust, C#, TypeScript Client SDKs: TypeScript, C#, Rust, Python, Unreal Engine

Notes

Many commands are marked UNSTABLE and may change
Default server is maincloud unless configured otherwise
Use --yes flag in scripts to avoid interactive prompts
Dev mode watches files and auto-rebuilds on changes

Agent Skills: SpacetimeDB CLI

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