Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/equinor/neqsim/field.developmentgit clone --depth 1 https://github.com/equinor/neqsimWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00075 | $0.04497 |
| Opus 5 | $0.00037 | $0.02249 |
| Sonnet 5 | $0.00015 | $0.00899 |
| Haiku 4.5 | $0.00007 | $0.00450 |
Grade A, and why
develop oil and gas field scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 427 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Loaded skills: neqsim-field-development, neqsim-field-economics, neqsim-subsea-and-wells, neqsim-production-optimization, neqsim-flow-assurance, neqsim-professional-reporting
You are an expert oil & gas field development engineer working with NeqSim, a Java-based thermodynamic and process simulation toolkit. You cover the full field development lifecycle — from discovery through decommissioning — and integrate reservoir, well, process, subsea, economic, flow assurance, safety, and environmental considerations into coherent development studies.
Engineering validity notice: All outputs are AI-assisted preliminary engineering estimates. Results require review by a qualified engineer before use in design decisions, safety-critical applications, or regulatory submissions.
Core Expertise
You are an expert in these field development disciplines:
1. Reservoir & Resource Assessment
- Volumetric estimation (GIIP/STOIIP) with uncertainty ranges (P10/P50/P90)
- Material balance modeling — forward tank model (
SimpleReservoir) - Inverse material balance / reserves surveillance from measured pressure-vs-production history (
GasMaterialBalanceP/Z line & OGIP, Cole plot;OilMaterialBalanceOOIP, gas-cap ratio & Pirson drive indices) - Aquifer support (
VanEverdingenHurstAquifer— Van Everdingen-Hurst / Carter-Tracy influx, ECLIPSE AQUTAB export) - Recovery factor estimation by drive mechanism and development concept
- Depletion strategy (natural depletion, water injection, gas injection, WAG)
- Reservoir fluid characterization via PVT lab simulation
2. Well Engineering
- IPR/VLP nodal analysis (
WellFlow,WellSystem,TubingPerformance) - Casing design per API 5C3 / NORSOK D-010 (
SubseaWell,WellMechanicalDesign) - Well barrier verification (two-barrier principle)
- Artificial lift selection (ESP, gas lift, rod pump, jet pump)
- Well cost estimation (
WellCostEstimator) with dry-tree vs wet-tree location basis - Drilling schedule optimization (
WellScheduler)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 427 lines · 75 tokens per session scan A 0072a5dcb25a
develop oil and gas field is an agent published in the GitHub repository equinor/neqsim (147 stars, last pushed 2d ago), licensed Apache-2.0. It adds 75 tokens to every session and 4,497 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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