gnn-simulation-execution

name	gnn-simulation-execution
description	GNN simulation script execution with result capture. Use when running generated simulation scripts, managing execution environments, handling framework dependencies, or capturing simulation outputs and metrics.

GNN Simulation Execution (Step 12)

Purpose

Executes rendered simulation scripts across all supported frameworks with robust error handling, circuit breaker patterns, retry logic, and comprehensive result capture.

Key Commands

# Execute all frameworks
python src/12_execute.py --target-dir input/gnn_files --output-dir output --verbose

# Specific frameworks only
python src/12_execute.py --frameworks "pymdp,jax" --verbose

# Lite preset (PyMDP, JAX, DisCoPy)
python src/12_execute.py --frameworks "lite" --verbose

API

from execute import (
    ExecutionEngine, GNNExecutor, execute_gnn_model, run_simulation,
    execute_pymdp_simulation_from_gnn, execute_pymdp_simulation,
    validate_execution_environment, process_execute,
    execute_script_safely
)

# Process execution step (used by pipeline)
process_execute(target_dir, output_dir, verbose=True)

# Execute a GNN model directly
result = execute_gnn_model(gnn_spec, framework="pymdp")

# Run a simulation configuration
result = run_simulation(config)

# Validate execution environment before running
env_report = validate_execution_environment()

# Use the ExecutionEngine class
engine = ExecutionEngine()

Key Exports

• process_execute — main pipeline processing function
• ExecutionEngine / GNNExecutor — execution engine classes
• execute_gnn_model / run_simulation — model execution functions
• execute_pymdp_simulation_from_gnn / execute_pymdp_simulation — PyMDP-specific
• validate_execution_environment — pre-execution validation
• execute_script_safely — safe script execution with error handling

Execution Flow

The execute processor follows this pipeline:

1. Script Discovery — scans output/11_render_output/ for .py and .jl files
2. Framework Filtering — filters by --frameworks parameter (presets or explicit list)
3. Subprocess Execution — runs each script with timeout protection and error capture
4. Result Collection — gathers stdout, stderr, exit codes, and timing data
5. Report Generation — produces per-framework execution summary and comparison

Framework Presets

Preset	Frameworks	Use Case
all	PyMDP, RxInfer, ActiveInference.jl, JAX, DisCoPy	Full execution (default)
lite	PyMDP, JAX, DisCoPy	Python-only, no Julia required
pymdp,jax	PyMDP, JAX	Fast Python subset

Dependencies

# Core execution (PyMDP)
uv sync

# For Julia frameworks
# Requires Julia installed + packages
julia -e 'using Pkg; Pkg.add(["RxInfer", "ActiveInference"])'

# For DisCoPy
uv sync --extra graphs

Output

• Execution results in output/12_execute_output/
• Per-framework subdirectories with captured outputs
• Execution summary report (JSON)
• Performance metrics and timing data

MCP Tools

This module registers tools with the GNN MCP server (see mcp.py):

• check_execute_dependencies
• execute_gnn_model
• execute_pymdp_simulation
• get_execute_module_info
• process_execute

References

• AGENTS.md — Module documentation
• README.md — Usage guide
• SPEC.md — Module specification

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Documentation

• README: Module Overview
• AGENTS: Agentic Workflows
• SPEC: Architectural Specification
• SKILL: Capability API