Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v2.1.0...v2.2.0

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v2.0.2...v2.1.0

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

What's Changed

• Fix codegen ownership errors in spawn closures and summon expressions by @cargopete in #1

New Contributors

• @cargopete made their first contribution in #1

Full Changelog: v2.0.1...v2.0.2

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v2.0.0...v2.0.1

The Steward Architecture

v2.0.0 introduces agents as stewards of long-lived systems — autonomous agents that own a domain, maintain it over time, react to change, coordinate with other stewards, and survive crashes.

Highlights

• Persistent Beliefs: @persistent annotation for agent fields that survive restarts
• Supervision Trees: OTP-style restart strategies (OneForOne, OneForAll, RestForOne)
• Session Types: Compile-time verified communication protocols
• Effect Handlers: Per-agent LLM configuration
• Observability: trace() and span blocks with OTLP export
• Built-in Tools: HTTP, Database, Filesystem, Shell with capability-based access

Example

agent Counter {
    @persistent count: Int

    on waking {
        trace("Restored at {self.count.get()}");
    }

    on start {
        self.count.set(self.count.get() + 1);
        yield(self.count.get());
    }
}

supervisor App {
    strategy: OneForOne
    children {
        Counter { restart: Permanent, count: 0 }
    }
}

run App;

Performance

Documentation

• Persistent Beliefs Guide
• Supervision Trees Guide
• Session Types Guide
• The Steward Pattern

See the full changelog for details.

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v1.0.4...v1.0.5

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v1.0.3...v1.0.4

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v1.0.2...v1.0.3

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v1.0.1...v1.0.2

Installation

curl -fsSL https://raw.githubusercontent.com/sagelang/sage/main/scripts/install.sh | bash

Or download manually for your platform:

Add export SAGE_TOOLCHAIN=/usr/local/sage/toolchain to your shell profile for fast builds.

Full Changelog: v1.0.0...v1.0.1