neqsim-thermodynamic-initialization SKILL.md skillA

neqsim-thermodynamic-initialization from equinor/neqsim is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add equinor/neqsim/neqsim-thermodynamic-initialization@git:20261106.de81c1f

Pins git:20261106.de81c1f in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
equinor/neqsim
Path
.github/skills/neqsim-thermodynamic-initialization/SKILL.md
Versions recorded
11
Latest version
git:20261106.de81c1f, committed Nov 6, 2026
First version recorded
Jul 30, 2026
Size
10,001 bytes
Repository stars
167
License
Apache-2.0

Select and audit NeqSim thermodynamic initialization levels for correctness and performance. USE WHEN: implementing or reviewing flashes, phase stability, EOS root selection, process-equipment thermodynamics, property access, or performance changes involving init(...) or initProperties().

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# NeqSim thermodynamic initialization

Use this skill whenever implementing or reviewing flashes, phase stability, EOS root selection, process-equipment thermodynamics, property access, or performance changes involving `init(...)` or `initProperties()`.

## Core rule

Always use the lowest initialization level required by the quantities actually consumed:

| Level | Use for |
|---|---|
| `init(0)` | Composition, phase amounts, and basic bookkeeping without EOS properties |
| `init(1)` | Fixed-T/P EOS state, cubic roots, molar volume, Z, fugacity coefficients, chemical potentials, phase-equilibrium Gibbs comparisons, TPD/stability calculations, and TP-flash iterations |
| `init(2)` | Caloric properties and first temperature derivatives: enthalpy, entropy, Cp/Cv, Joule-Thomson coefficient, and related temperature derivatives |
| `init(3)` | Second composition derivatives, derivative matrices, and other explicitly verified level-3 quantities |
| `initProperties()` | Density models and transport/interfacial properties when those properties are requested |
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add equinor/neqsim/neqsim-thermodynamic-initialization@sha256:7ea8a98280f587ac

The line at the top of this page pins the label git:20261106.de81c1f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_dlsozxsmckfja5m5.svg)](https://markdownregistry.com/a/art_dlsozxsmckfja5m5)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 11 versions of this file, between Jul 30, 2026 and Nov 6, 2026, about one every 10 days.

versioncommittedcommitsizeaudit
git:20261106.de81c1f latest2026-11-06 de81c1f 10,001 BA view · diff
git:20261026.9e415442026-10-26 9e41544 9,590 BA view · diff
git:20261026.b9133bb2026-10-26 b9133bb 8,415 BA view · diff
git:20261026.6caba992026-10-26 6caba99 8,387 BA view · diff
git:20261021.a051ad92026-10-21 a051ad9 5,753 BA view · diff
git:20261018.072abce2026-10-18 072abce 5,079 BA view · diff
git:20261005.922e7982026-10-05 922e798 4,517 BA view · diff
git:20260912.c5ddb972026-09-12 c5ddb97 3,753 BA view · diff
git:20260824.e467ebc2026-08-24 e467ebc 3,725 BA view · diff
git:20260809.56745ee2026-08-09 56745ee 2,898 BA view · diff
git:20260730.bd16de22026-07-30 bd16de2 2,699 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (10001 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

equinor/neqsim · 167 stars · license Apache-2.0 · pushed 2026-11-08 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_dlsozxsmckfja5m5
GET https://markdownregistry.com/api/v1/resolve?ref=equinor/neqsim/neqsim-thermodynamic-initialization
GET https://markdownregistry.com/api/v1/blob/7ea8a98280f587ac3b401b5fb13bb37599b4216dda8be615e026117911adf80b

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from equinor/neqsim

.cursorrules Cursor rule
equinor/neqsim · .cursorrules
git:20260418.119a3f4 · audit A · 167 stars
analyze-convergence SKILL.md skill
equinor/neqsim · .github/skills/analyze-convergence/SKILL.md · Interpret flash algorithm convergence metrics, identify patterns, and produce
git:20260919.77c34a0 · audit A · 167 stars
analyze-gibbs-convergence SKILL.md skill
equinor/neqsim · .github/skills/analyze-gibbs-convergence/SKILL.md · Interpret Gibbs energy minimization convergence metrics, analyze Jacobian
git:20260919.77c34a0 · audit A · 167 stars
book-creation SKILL.md skill
equinor/neqsim · .github/skills/book-creation/SKILL.md · PaperLab skill for book creation workflows in scientific writing and book production.
git:20260919.77c34a0 · audit B · 167 stars
design-flash-benchmark SKILL.md skill
equinor/neqsim · .github/skills/design-flash-benchmark/SKILL.md · Create a structured test matrix for comparing flash algorithm performance
git:20260919.77c34a0 · audit A · 167 stars
design-reactor-benchmark SKILL.md skill
equinor/neqsim · .github/skills/design-reactor-benchmark/SKILL.md · Create a structured test matrix for evaluating Gibbs energy minimization
git:20260919.77c34a0 · audit A · 167 stars
figure-discussion SKILL.md skill
equinor/neqsim · .github/skills/figure-discussion/SKILL.md · PaperLab skill for figure discussion workflows in scientific writing and book production.
git:20260919.77c34a0 · audit A · 167 stars
generate-publication-figures SKILL.md skill
equinor/neqsim · .github/skills/generate-publication-figures/SKILL.md · Create matplotlib figures that meet journal submission standards: correct fonts,
git:20260919.77c34a0 · audit A · 167 stars
journal-formatting SKILL.md skill
equinor/neqsim · .github/skills/journal-formatting/SKILL.md · Apply journal-specific formatting rules to transform a manuscript from Markdown
git:20260919.77c34a0 · audit A · 167 stars
neqsim-acid-gas-treating SKILL.md skill
equinor/neqsim · .github/skills/neqsim-acid-gas-treating/SKILL.md · Guides NeqSim agents through acid-gas and contaminant removal with SimpleAmineAbsorber, SimpleAmineRegenerator…
git:20261004.fc23e28 · audit A · 167 stars
neqsim-advanced-control-mpc-and-virtual-sensing SKILL.md skill
equinor/neqsim · .github/skills/neqsim-advanced-control-mpc-and-virtual-sensing/SKILL.md · Guides agents through ProcessLinkedMPC, ProcessLinearizer, ModelPredictiveController, VirtualFlowMeter, SoftSensor, and…
git:20261004.fc23e28 · audit A · 167 stars
neqsim-agent-handoff SKILL.md skill
equinor/neqsim · .github/skills/neqsim-agent-handoff/SKILL.md · Agent-to-agent communication schema for NeqSim. USE WHEN: composing multi-agent pipelines where one agent's output…
git:20260926.08d0028 · audit A · 167 stars

Every file in equinor/neqsim

Browse by kind, by grade A, or by owner.