The manuals. All of them.

01 Getting started 02 Loading networks 03 Running power flows 04 The desktop app 05 Analysis views 06 Contingency analysis 07 Frequency studies 08 Replaying recorded events 09 Counterfactuals 10 State estimation 11 Estimating GB history 12 Replaying estimated states 13 The GDA bridge 14 Validation tools 15 Exports and formats - a field guide 16 Configuration 17 Troubleshooting 18 Extending GridSim 19 CLI reference 20 Running a harmonic study 21 Interposing live telemetry 22 Electromagnetic transients (EMT) 23 23. Licensing and activation

01 Architecture 02 Data model and per-unit conventions 03 Power flow 04 Sparse and GPU numerics 05 Frequency dynamics 06 State estimation 07 The evidence engine 08 Provenance and invariants 09 GDA integration 10 File and wire formats 11 Validation 12 Glossary 13 Asset-dynamics data grounding 14 Blind cross-event validation of the asset-dynamics cascade 15 Protections 16 Physics conformance and the constrained estimator 17 Protection assessment (a passive relay overlay) 18 18. Real-time, distribution and dynamic estimation 19 Harmonics 20 20. The RTU/SCADA interposer 21 21. Electromagnetic transient (EMT) simulation 22 22. Licensing: key format and trust model