@durable-streams/cli

Durable Streams CLI

A command-line tool for interacting with durable streams.

Installation

From npm

# Global installation
npm install -g @durable-streams/cli

# Or run directly with npx
npx @durable-streams/cli create my-stream
npx @durable-streams/cli read my-stream

From source (for development)

# Clone the repository
git clone https://github.com/durable-streams/durable-streams.git
cd durable-streams

# Install dependencies
pnpm install

# Build the CLI
pnpm build

# Link globally for development (uses tsx, no rebuild needed)
cd packages/cli
pnpm link:dev

# Now you can use durable-stream-dev anywhere
durable-stream-dev create my-stream

Quick Start

The easiest way to get started is to run the local development server and use the CLI:

Terminal 1: Start the local server

pnpm start:dev

This will start a Durable Streams server at http://localhost:4437 with live reloading.

Terminal 2: Use the CLI

# Set the server URL (optional, defaults to http://localhost:4437)
export STREAM_URL=http://localhost:4437

# Create a stream
durable-stream-dev create my-stream

# Write to the stream
durable-stream-dev write my-stream "Hello, world!"

# Read from the stream (follows live)
durable-stream-dev read my-stream

Usage

Environment Variables

• STREAM_URL - Base URL of the stream server (default: http://localhost:4437)
• STREAM_AUTH - Authorization header value (e.g., Bearer my-token)

Global Options

• --auth <value> - Authorization header value (overrides STREAM_AUTH env var)

Write Options

• --content-type <type> - Content-Type for the message (default: application/octet-stream)
• --json - Shorthand for --content-type application/json

Commands

Create a stream

durable-stream-dev create <stream_id>

Write to a stream

# Write content as arguments
durable-stream-dev write <stream_id> "Hello, world!"

# Pipe content from stdin
echo "Hello from stdin" | durable-stream-dev write <stream_id>
cat file.txt | durable-stream-dev write <stream_id>

# Specify content type
durable-stream-dev write <stream_id> '{"key": "value"}' --content-type application/json

# Shorthand for JSON
durable-stream-dev write <stream_id> '{"key": "value"}' --json

JSON Mode Array Flattening

In JSON mode (--json or --content-type application/json), top-level arrays are flattened into individual messages:

Input	Messages stored
{}	1 message: {}
[{}, {}]	2 messages: {}, {}
[[{}, {}]]	1 message: [{}, {}]

This matches the protocol's batch semantics.

Read from a stream

# Follows the stream and outputs new data to stdout
durable-stream-dev read <stream_id>

Delete a stream

durable-stream-dev delete <stream_id>

Authentication

Use the --auth flag or STREAM_AUTH environment variable to authenticate:

# Using environment variable
export STREAM_AUTH="Bearer my-token"
durable-stream-dev read my-stream

# Using --auth flag (overrides env var)
durable-stream-dev --auth "Bearer my-token" read my-stream

# Works with any auth scheme
durable-stream-dev --auth "Basic dXNlcjpwYXNz" read my-stream
durable-stream-dev --auth "ApiKey abc123" read my-stream

Complete Example Workflow

# Terminal 1: Start the local development server
pnpm start:dev

# Terminal 2: Set up the stream
export STREAM_URL=http://localhost:4437
durable-stream-dev create test-stream

# Terminal 3: Start reading (will show data as it arrives)
export STREAM_URL=http://localhost:4437
durable-stream-dev read test-stream

# Back in Terminal 2: Write data and watch it appear in Terminal 3
durable-stream-dev write test-stream "First message"
durable-stream-dev write test-stream "Second message"
echo "Piped content!" | durable-stream-dev write test-stream

Development

# Start the example server with live reloading
pnpm start:dev

# Watch mode for CLI development (rebuilds dist/)
pnpm dev

# Build
pnpm build

# Link globally for development (uses tsx, no rebuild needed)
pnpm link:dev