Borrowing it
Nothing to install: this file belongs to equinor/neqsim. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/equinor/neqsim/master/.github/skills/neqsim-compressor-antisurge-recycle/SKILL.mdgit clone --depth 1 https://github.com/equinor/neqsimWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/equinor/neqsim/neqsim-compressor-antisurge-recycle)<a href="https://agentmods.dev/skills/equinor/neqsim/neqsim-compressor-antisurge-recycle"><img src="https://agentmods.dev/badge/skills/equinor/neqsim/neqsim-compressor-antisurge-recycle/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/equinor/neqsim/neqsim-compressor-antisurge-recycle"><img src="https://agentmods.dev/badge/skills/equinor/neqsim/neqsim-compressor-antisurge-recycle.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What 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 5.1 | $0.00117 | $0.01841 |
| Opus 5 | $0.00059 | $0.00920 |
| Sonnet 5 | $0.00023 | $0.00368 |
| Haiku 4.5 | $0.00012 | $0.00184 |
Grade A, and why
neqsim-compressor-antisurge-recycle scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NeqSim Compressor Anti-Surge & Minimum-Speed Recycle Control Skill
This skill provides patterns for anti-surge protection, minimum-speed recycle coordination, and energy/CO2 emission evaluations for centrifugal compressor recycle loops.
When to Use
- Coordinating compressor speed and recycle-valve opening at minimum speed (e.g. PEPR control optimization)
- Preventing opposing speed demand and recycle-valve opening in compressor pressure loops
- Sizing anti-surge recycle valves and modeling anti-surge controllers
- Calculating power penalties, fuel gas consumption, CO2 emission reductions, and financial cost savings ($CO_2$ tax + fuel gas value) from eliminating unnecessary recycle opening
- Running dynamic simulation of split-range pressure, speed, and recycle control using
MinimumSpeedRecycleControllerStructure
Standards: API 617 / API 619, IEC 60534 / ISA-75, ISO 50001 / ISO 14064 (energy & carbon emissions).
Key Java Class: MinimumSpeedRecycleControllerStructure
neqsim.process.controllerdevice.structure.MinimumSpeedRecycleControllerStructure coordinates pressure control between compressor speed and recycle-valve opening when the compressor reaches its minimum speed.
Core Features
- Split-Range Output Transition: Pressure controller output is divided at a configurable transition (e.g., 75%).
- Speed Command Range: Above transition (75% to 105%), recycle addition is zero and compressor speed increases linearly from minimum (75%) to maximum (100%).
- Inverse Recycle Addition: Below transition (0% to 75%), speed is held at minimum (75%) while an inverse recycle addition increases as pressure output falls.
- Latch on Entry: On lower-range entry, the previously selected recycle command is latched and pressure-derived recycle is added to that baseline.
- High Selector Protection: Independent anti-surge and suction-pressure demands participate in a high selector ($R_{selected} = \max(R_{latch} + R_{add}, R_{AS}, R_{suction})$) so protection authority is never suppressed.
- Unwind before Speed Increase: On rising pressure, pressure-derived recycle unwinds to the latched baseline before speed increases.
- Dynamic Saturation Floor: Applies a lower output limit (
latched * 74 / 100) to prevent integral windup.
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.
- 11d ago First seen · 130 lines · 117 tokens per session scan A 7fb234a5352f
neqsim-compressor-antisurge-recycle is a skill published in the GitHub repository equinor/neqsim (151 stars, last pushed today), licensed Apache-2.0. It adds 117 tokens to every session and 1,841 once invoked, about $0.0006 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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