Z-Script: Checked Scripts for Private Engine Capabilities

Customer Benefit: Agents can use your private engine capabilities through small checked scripts, never through an open endpoint.

Overview

Opening general-purpose HTTP routes or Python/shell interpreters to autonomous agents creates substantial attack surfaces: credential exfiltration, SSRF, arbitrary code execution, and unconstrained resource consumption.

Z-Script is a purpose-built, pure, deterministic Lisp language designed specifically for agent decision rules, guardrails, argument resolvers, and controlled execution of private engine capabilities.

Key Guarantees

Zero External I/O: The Z-Script runtime contains no network calls, no disk access, no system clock, and no random number generator. Evaluation of the same script and inputs always yields byte-identical output.
Resource Bounded: Every script executes within hard fuel and stack depth limits. Infinite loops or recursive overflows are impossible.
Controlled Host Capabilities: A script cannot call arbitrary code. It interacts with the outside world strictly through a versioned allowlist of host capabilities resolved by the trusted host after evaluation.
Never an Open Endpoint: Private engine capabilities are never exposed as public HTTP routes or MCP tools. They are invoked only through authenticated, checked Z-Script programs.
Write Confirmations: Any host capability with write effects requires explicit user confirmation, exactly like an act tool call.

Example: Argument Resolver & Guard

(defn check-leave-eligibility [employee-tier requested-days]
  (let [max-allowed (if (= employee-tier "executive") 30 20)]
    {:eligible (<= requested-days max-allowed)
     :tier employee-tier
     :allowed max-allowed
     :status (if (<= requested-days max-allowed)
                 :approved
                 :exceeds_allowance)}))

When evaluated, the program produces an immutable structured result that feeds directly into the decision pipeline.

Interactive Editor & Compiler in Studio

Explore and test Z-Script programs in the Studio:

Studio Route: Navigate to Z-Script Editor.
Features: Syntax highlighting, real-time expression evaluation, AST tree visualizer, and built-in reference documentation.