InterPSS Agent

September 2, 2026 · View on GitHub

This document describes how to build and run the InterPSS simulation CLI and its report generators for power system simulations.

Project Overview

InterPSS is an open-source, Java-based power system simulation platform. This workspace runs simulations through a native Java CLI (IpssCmd) and generates Markdown reports through the same CLI (IpssCmd report ...). There is no JPype bridge and no JVM-path configuration.

Project layout — the runtime is spread across a parent directory where wspace/ is the working directory for data and results, while src/, lib/, and config/ are shared infrastructure at the parent level. The tree below uses ipss-agent/ as the project root (this repository).

ipss-agent/
├── .agents/
│   └── skills/
│       ├── ipss-sim/              # OpenAI Codex Desktop — simulation skill
│       ├── nerc-report-html/      # Interactive HTML dashboard skill
│       └── nerc-report-slides/    # NERC TPL slide-deck skill
├── .claude/
│   ├── commands/
│   │   ├── ipss-sim.md            # Claude Code slash-command entry point
│   │   ├── nerc-report-html.md
│   │   └── nerc-report-slides.md
│   └── skills/
│       └── ipss-sim/              # Claude Code skill copy (synced from .agents)
├── interpss-persistent/           # DeepSeek Harness DSH plugin package
├── scripts/
│   └── sync_ipss_skills.sh        # Copy canonical ipss-sim skill to .claude/
├── pom.xml                        # Maven build for the Java CLI (Uber JAR)
├── config/
│   ├── aclf_run.json              # ACLF NR / limit-control settings (used by IpssCmd)
│   └── gen_report.json            # Report band thresholds (used by org.interpss.agent.report)
├── lib/
│   ├── ipss_runnable.jar          # Main InterPSS runnable JAR
│   └── deps/                      # Third-party JARs
│       ├── ipss.core.lib-1.0.16.jar
│       ├── ieee.odm.schema-1.0.1.jar
│       ├── ieee.odm_pss-1.0.1.jar
│       ├── slf4j-api-1.7.36.jar / slf4j-simple-1.7.36.jar
│       ├── org.eclipse.emf.common-2.45.0.jar / .ecore-2.38.0.jar
│       ├── hazelcast-5.3.6.jar
│       ├── jaxb-api-2.3.1.jar / jaxb-impl-2.3.1.jar
│       ├── javax.activation-api-1.2.0.jar
│       ├── commons-math3-3.6.1.jar
│       ├── JKLU-1.0.0.jar / BTFJ-1.0.1.jar / AMDJ-1.0.1.jar / COLAMDJ-1.0.1.jar
│       ├── csparsej-1.1.1.jar
│       ├── dflib-2.0.0-M6.jar / dflib-csv-2.0.0-M6.jar / dflib-json-2.0.0-M6.jar
│       ├── commons-csv-1.10.0.jar
│       └── gson-2.11.0.jar
├── src/
│   ├── main/java/org/interpss/agent/   # IpssCmd Java sources
│   │   ├── IpssCmd.java
│   │   ├── cli/ (CliArgs, ReportCliArgs)
│   │   ├── report/ (Markdown report generators)
│   │   ├── input/ (IeeeFileAdapter, PsseFileAdapter, NetworkLoader)
│   │   ├── runner/ (AclfRunner, ContingencyRunner)
│   │   └── util/ (IpssNetworkInfo, ProjectPaths)
├── target/
│   └── ipss-agent-cmd-1.0.0-uber.jar   # Built by `./mvnw clean package`
├── InstallDSHPlugin.md            # DeepSeek Harness plugin install guide
└── wspace/                             # <-- working directory
    ├── data/
    │   └── ieee/
    │       └── Ieee118Bus/
    │           └── ieee118.ieee        # IEEE 118-bus test case

JAR file names and versions under lib/deps/ follow pom.xml and whatever Maven resolves; the lib/deps fragment in the tree above is illustrative.

Prerequisites

Java JDK 21 (or compatible version)
Maven (the repo includes the mvnw wrapper, which downloads a pinned Maven distribution on first use)
macOS / Linux / Windows

Check your Java version:

java -version

Step 1: Build the CLI

From the project root, build the self-contained Uber JAR:

macOS / Linux:

./mvnw -q clean package

Windows PowerShell:

.\mvnw.cmd -q clean package

This compiles src/main/java and assembles target/ipss-agent-cmd-1.0.0-uber.jar, which bundles the InterPSS runtime, all dependency JARs, and the CLI classes. The manifest declares org.interpss.agent.IpssCmd as the main class.

The compiled target/ output and downloaded Maven distribution are local build artifacts and are not committed.

Step 1b: Run Tests

From the project root, run the JUnit 5 test suite and generate a JaCoCo coverage report:

./mvnw test
open target/site/jacoco/index.html   # macOS — view coverage report

Windows PowerShell:

.\mvnw.cmd test
Start-Process target/site/jacoco/index.html

Tests use self-contained fixtures under src/test/resources/ (IEEE-14 CDF, IEEE-9 PSS/E RAW, minimal contingency JSON). JaCoCo reports coverage but does not enforce a minimum threshold.

Step 2: JAR Dependencies

The runtime dependency JARs are resolved by Maven during the build and bundled into the Uber JAR. lib/ipss_runnable.jar and lib/deps/*.jar are the InterPSS runtime and its third-party dependencies; the pom.xml pulls them from the local lib/m2-repo (for the InterPSS/ODM artifacts) and Maven Central (for third-party artifacts).

InterPSS Core JARs

JAR	Source	Purpose
`ipss_runnable.jar`	InterPSS build	Plugin core, adapters, samples
`ipss.core.lib-1.0.16.jar`	InterPSS build	ACLF engine, algorithms, EMF model
`ieee.odm.schema-1.0.1.jar`	InterPSS build	IEEE ODM XML schema
`ieee.odm_pss-1.0.1.jar`	InterPSS build	IEEE ODM PSS types

Sparse Solver JARs

JAR	Purpose
`JKLU-1.0.0.jar`	KLU sparse LU solver
`BTFJ-1.0.1.jar`	Block Triangular Form permutation
`AMDJ-1.0.1.jar`	Approximate Minimum Degree ordering
`COLAMDJ-1.0.1.jar`	Column AMD ordering
`csparsej-1.1.1.jar`	CSPARSEJ — CSparse sparse matrix library

DataFrame Export JARs (for CSV output)

JAR	Maven Central Coordinates	Purpose
`dflib-2.0.0-M6.jar`	`org.dflib:dflib:2.0.0-M6`	DataFrame library
`dflib-csv-2.0.0-M6.jar`	`org.dflib:dflib-csv:2.0.0-M6`	CSV save support
`dflib-json-2.0.0-M6.jar`	`org.dflib:dflib-json:2.0.0-M6`	JSON support
`commons-csv-1.10.0.jar`	`org.apache.commons:commons-csv:1.10.0`	CSV parsing

Third-Party Support JARs

JAR	Purpose
`slf4j-api-1.7.36.jar` / `slf4j-simple-1.7.36.jar`	Logging
`org.eclipse.emf.common-2.45.0.jar` / `.ecore-2.38.0.jar`	Eclipse Modeling Framework
`hazelcast-5.3.6.jar`	Distributed computing
`jaxb-api-2.3.1.jar` / `jaxb-impl-2.3.1.jar`	XML binding
`javax.activation-api-1.2.0.jar`	Java Activation Framework
`commons-math3-3.6.1.jar`	Math utilities

Step 3: ACLF run configuration

aclf_run.json defines Newton–Raphson and related options (maxIterations, tolerance, lfMethod, PV/PQ limits, tap/shunt adjustments, and so on). For ACLF, IpssCmd resolves the file with a two-tier lookup:

Case-specific (preferred): <input_parent>/aclf_run.json relative to wspace/ (e.g. data/psse/OpenEInterconnect/aclf_run.json for input under that folder).
Project default (fallback): config/aclf_run.json at the project root.

The chosen path is loaded via AclfRunConfigRec.loadAclfRunConfig and applied with configAclfRun(algo, polarCoordinate, includeAdjustments, False). The CLI prints Using config file: <path> to stderr so you can confirm which file ran. Edit the JSON to tune convergence or solver behavior.

Step 4: Running simulations

The CLI entry point is IpssCmd, packaged in the Uber JAR. Run it from the wspace/ directory (paths below are relative to wspace/):

macOS / Linux:

cd wspace
java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar aclf ieee data/ieee/Ieee118Bus/ieee118.ieee

Windows PowerShell:

cd wspace
java -jar ..\target\ipss-agent-cmd-1.0.0-uber.jar aclf ieee data\ieee\Ieee118Bus\ieee118.ieee

Command Syntax

java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar <simutype> <format> <input> [<cont_file> <monitor_file>]

Argument	Values	Description
`simutype`	`aclf`, `ca`	Simulation type: load flow or contingency analysis
`format`	`ieee`, `psse`	Input file format
`input`	path	Input file path (relative to `wspace/`)
`cont_file` / `monitor_file`	path	Contingency / monitored-branches JSON (required for `ca`)

Contingency analysis example:

cd wspace
java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar ca psse \
  data/psse/Texas2K/Texas2k_series24_case1_2016summerPeak_v36.RAW \
  data/psse/Texas2K/2k_contingencies_115kVAbove.json \
  data/psse/Texas2K/2k_monitored_branches.json

See IpssCmd.md for full usage.

Step 5: Generating reports

Markdown reports are generated by the Java CLI report subcommand.

NERC TPL-001-5 report

java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar report nerc "IEEE 118-Bus Test Case" data/ieee/Ieee118Bus/result
java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar report nerc "Texas 2K-Bus System" data/psse/Texas2K/result

Writes NERC_TPL_001_5_Report.md into the same result directory.

AC Load Flow report

java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar aclf ieee data/ieee/Ieee118Bus/ieee118.ieee
java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar report aclf "IEEE 118-Bus Test Case" data/ieee/Ieee118Bus/result

Writes AC_Loadflow_Report.md into the same result directory.

Thresholds come from config/gen_report.json. See GenReport.md.

For system design, see docs/architecture.md.

Step 6: Verifying the `ipss-sim` Agent Skill

This repository already includes agent-facing skill files so Codex and Claude can run the full simulation workflow from a natural-language prompt. No copy step is required when the repository is opened as a project; setup means verifying the files are present and then invoking the skill from the supported agent.

OpenAI Codex Desktop

The Codex project skill is stored at:

.agents/skills/ipss-sim/SKILL.md

UI metadata for the skill is stored at:

.agents/skills/ipss-sim/agents/openai.yaml

To use it:

Add or open this repository folder as a Codex Desktop project.
Make sure Step 1 (build) has been completed.
Verify the files below are present.
Invoke the skill by name in a prompt:

Use $ipss-sim to run data/ieee/Ieee118Bus/ieee118.ieee "IEEE 118-Bus Test Case"

For a directory that contains a case file plus contingency and monitored-branch JSON files:

Use $ipss-sim to run data/psse/Texas2K "Texas 2K-Bus System"

Codex should load the project skill from .agents/skills/ipss-sim/ and then run the workflow from wspace/:

ACLF with java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar aclf ...
CA with java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar ca ... when contingency and monitored files are provided or auto-discovered
Report generation with java -jar ../target/ipss-agent-cmd-1.0.0-uber.jar report nerc ...

Claude Code CLI

Claude skill and command registration files are stored at:

.claude/skills/ipss-sim/SKILL.md
.claude/commands/ipss-sim.md

Use the slash-command form:

/ipss-sim data/ieee/Ieee118Bus/ieee118.ieee "IEEE 118-Bus Test Case"

or directory mode:

/ipss-sim data/psse/Texas2K "Texas 2K-Bus System"

Version-Control Notes

.agents/skills/ipss-sim/**, .claude/skills/ipss-sim/**, and .claude/commands/ipss-sim.md should be committed.
.agents/skills/nerc-report-html/**, .agents/skills/nerc-report-slides/**, and .claude/commands/nerc-report-*.md should be committed.
target/, generated lib/deps/*.jar, .mvn/wrapper/dists/, and wspace/**/result/ are local build or output artifacts and should remain uncommitted.
If the skill instructions change, edit .agents/skills/ipss-sim/SKILL.md (canonical), then run ./scripts/sync_ipss_skills.sh from the project root to copy it to .claude/skills/ipss-sim/SKILL.md. Set SYNC_CODEX=1 to also refresh ~/.codex/skills/ipss-sim/SKILL.md when that directory exists.

DeepSeek Harness (DSH Plugin)

For the browser InterPSS tab in DeepSeek Harness, build the CLI (Step 1) and follow InstallDSHPlugin.md. The plugin package lives in interpss-persistent/; activation requires this workspace's README.md H1 to be exactly # iPSS Agent.

Follow-on report artifacts use the Codex skills $nerc-report-html and $nerc-report-slides (canonical files under .agents/skills/). Claude Code slash commands /nerc-report-html and /nerc-report-slides point at the same skills.

Quick Verification

From the project root, these commands should show the registered skill files:

macOS / Linux:

find .agents/skills/ipss-sim .claude/skills/ipss-sim .claude/commands -maxdepth 2 -type f | sort

Windows PowerShell:

Get-ChildItem .agents\skills\ipss-sim, .claude\skills\ipss-sim, .claude\commands -Recurse -File |
  ForEach-Object { Resolve-Path -Relative $_.FullName }

Expected entries include:

.agents/skills/ipss-sim/SKILL.md
.agents/skills/ipss-sim/agents/openai.yaml
.claude/commands/ipss-sim.md
.claude/commands/nerc-report-html.md
.claude/commands/nerc-report-slides.md
.claude/skills/ipss-sim/SKILL.md