Simulation Skill

This skill provides tools for executing and managing simulations.

Overview

The Simulation skill enables agents to:

• Run simulations from simulator input files
• Run and heal run + auto-fix on failure, it will launch both run and monitor in one go from user input files
• Monitor simulation progress and status
• Stop running simulations when needed
• Manage simulation processes and output directories

Tools

run_and_heal

Runs a simulation and, on failure, automatically parses PRT errors, optionally consults RAG (simulator_manual, simulator_examples), and produces a fixed DATA file. Implemented as a chain: run_simulation in parallel with PRT wait + error parsing; if errors are found, extract keyword, call RAG tools if config is available, then create a fixed DATA file (e.g. *_FIXED.DATA).

Implementation: simulator_agent/tools/self_heal_chain.py

Usage (script):

python -m simulator_agent.tools.self_heal_chain \
  --prt-loc-dir /path/to/output/ \
  --data-file /path/to/CASE.DATA \
  [--config /path/to/config.yaml] \
  [--output-file /path/to/output/]

Parameters: data_file, output_dir (optional), num_mpi_processes (default: 1, for MPI parallel runs with np>1).

When to use:

• When the user wants to run a case and automatically attempt to fix and re-run on simulation failure (run-and-heal flow).
• Alternative to manual run_simulation → inspect failure → patch_simulation_input_keyword/modify_simulation_input_file → run_simulation.

run_simulation

Runs a simulation from a DATA file. Supports both foreground (wait for completion) and background (return immediately) execution.

Usage:

run_simulation(
    data_file: str,
    output_dir: Optional[str] = None,
    num_threads: int = 1,
    num_mpi_processes: int = 1,
    additional_args: Optional[str] = None,
    background: bool = True
) -> str

Parameters:

• data_file: Path to the simulator input (DATA) file to run
• output_dir: Optional output directory (default: same directory as DATA file)
• num_threads: Number of threads for parallel simulation (default: 1)
• num_mpi_processes: Number of MPI processes (np). When > 1, runs via mpirun -np N flow ... (default: 1). Set OPM_MPI_LAUNCHER=mpiexec to use mpiexec instead.
• additional_args: Optional additional command-line arguments
• background: If True, start and return immediately. If False, wait for completion and return full report including return code, stdout, stderr, and parsed PRT errors on failure.

Example:

run_simulation(
    data_file="SPE1CASE1_AGENT_GENERATED.DATA",
    output_dir="/path/to/output",
    num_threads=4,
    background=False
)

Returns:

• Background mode: Simulation start confirmation with PID, output directory, and log paths
• Foreground mode: Full completion report with return code, stdout, stderr, and PRT errors (if failed)

When to use:

• Direct run (TOOL_DECISION_TREE.md Section 2.3) when user provides DATA file path + run intent
• After scenario modifications (Section 2.4) to execute the modified case
• HITL confirm run flow (Section 2.1) after user confirms
• After auto-fix (Section 2.2) to re-run the fixed case

monitor_simulation

Monitors the progress of a running simulation by reading the PRT file.

Usage:

monitor_simulation(
    output_dir: str,
    tail_lines: int = 80,
    use_llm_summary: bool = False,
    llm_model: Optional[str] = None
) -> str

Parameters:

• output_dir: Directory containing simulation output files (must contain .PRT file)
• tail_lines: Number of lines to read from end of PRT file (default: 80)
• use_llm_summary: If True, use LLM to summarize the PRT tail (default: False)
• llm_model: Optional LLM model override for summary

Example:

monitor_simulation(
    output_dir="/path/to/output",
    tail_lines=100,
    use_llm_summary=True
)

Returns: Simulation status (running/completed/failed) and PRT tail content, optionally with LLM summary.

When to use:

• When user asks to check simulation progress (Section 3.5, LLM choice)
• For background runs to track completion
• When debugging simulation issues

stop_simulation

Stops a running simulation by process ID.

Usage:

stop_simulation(
    pid: int,
    output_dir: Optional[str] = None,
    force: bool = False
) -> str

Parameters:

• pid: Process ID of the simulation to stop
• output_dir: Optional output directory with run metadata
• force: If True, use SIGKILL (force kill). If False, use SIGTERM (graceful shutdown).

Example:

stop_simulation(
    pid=12345,
    output_dir="/path/to/output",
    force=False
)

Returns: Confirmation message with PID, signal used, and metadata update status.

When to use:

• When user requests to stop a running simulation (Section 3.5, LLM choice)
• For process management and cleanup

Workflow Integration

This skill integrates with the Simulator Agent's decision tree (TOOL_DECISION_TREE.md):

1. Direct Run (Section 2.3):

   run_and_heal (optionally after HITL confirm)
   

2. Scenario Test Chain (Section 2.4):

   parse_simulation_input_file → simulator_manual → simulator_examples → modify_simulation_input_file → run_and_heal
   

3. HITL Confirm Run (Section 2.1):

   User confirms → run_and_heal
   

4. After run_and_heal (Section 3.3):

   run_and_heal → (auto-fix if failed) → summarize
   

5. Monitoring (Section 3.5):

   monitor_simulation (via LLM choice)
   stop_simulation (via LLM choice)
   

Implementation Details

Tools are implemented as LangChain tools with Pydantic input schemas. The skill uses:

• Subprocess management: For running Flow executables
• Process tracking: PID and metadata stored in run.json
• Output parsing: PRT file parsing for progress and errors
• Error handling: Comprehensive error messages and failure reporting

Error Handling

All tools return descriptive error messages if:

• DATA files are not found
• Flow executable is not available
• Output directories cannot be created
• Processes cannot be stopped
• PRT files cannot be read

Environment Variables

• OPM_PROJECT_ROOT: Used to resolve paths in Docker environments
• OPM_FLOW_EXTRA_ARGS: Additional arguments passed to Flow (e.g., --CheckSatfuncConsistency=0)

References

• Tool Decision Tree - Routing logic
• Simulation Tools README - Detailed tool documentation