Execution Constraint Engine (ECE)

Runtime decision layer for enforcing cost constraints in multi-step LLM workflows.

ECE evaluates projected cost before each step and returns a BLOCK decision when execution would exceed a defined budget.

Install

pip install veloryn

Minimal usage

from veloryn import execute

def run_task():
    return {
        "output": "model response",
        "usage": {
            "input_tokens": 120,
            "output_tokens": 300,
        },
    }

execute(
    task_id="demo",
    run_task=run_task,
    input_data="Analyze input",
    model="gpt-4o",
    max_cost=0.05,
)

run_task must return usage (input/output tokens).
ECE does not infer cost automatically.

Full documentation and examples:
https://github.com/veloryn-intel/execution-constraint-engine