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neqsim-capex-opex-screening

neqsim-capex-opex-screening is a skill for Claude Code, Codex from equinor/neqsim-community-skills. It costs 87 tokens per session (1,384 once invoked), scanned A, original, Apache-2.0.

A first-pass project cost calculator that estimates installed capital cost, annual operating cost, and total cost over the project life from basic cost inputs. CAPEX means money spent to build an asset; OPEX means the cost of running it.

In plain words
What is it for?
It helps apply installation and contingency factors to bare equipment cost, add energy and operating costs, and calculate lifecycle cost of ownership.
Why use it?
It gives an early cost magnitude when detailed estimating data or specialist tools are not available. The result is a screening estimate, not a final project budget.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 4repo 4d ago A scan 87 tokens original Apache-2.0

Good fit It helps apply installation and contingency factors to bare equipment cost, add energy and operating costs, and calculate lifecycle cost of ownership.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening
View source ↗ equinor/neqsim-community-skills equinor.github.io
Install

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.

Any agent
npx skills add equinor/neqsim-community-skills --skill neqsim-capex-opex-screening
Clone the repo
git clone --depth 1 https://github.com/equinor/neqsim-community-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for neqsim-capex-opex-screening

README.md
[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening/github.svg)](https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening)
Your own site
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening/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.

agentmods 80×15 button for neqsim-capex-opex-screening

Your own site · 80×15
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-capex-opex-screening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,384 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00087 $0.01384
Opus 5.5 $0.00035 $0.00554
Sonnet 5.5 $0.00017 $0.00277
Haiku 4.5 $0.00009 $0.00138

Measured 1mo ago against content hash b576e6b06921, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

neqsim-capex-opex-screening 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 1mo ago.

The scan reads SKILL.md. This mod also ships 4 executable files (examples/basic_capex_opex.py, src/capex_opex_screening/__init__.py, src/capex_opex_screening/model.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/field-development/neqsim-capex-opex-screening/SKILL.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CAPEX/OPEX Screening

Use this skill for a quick, public screening of project cost. Given a bare equipment cost, it applies a public installation (Lang/Hand-style) factor and a contingency allowance to estimate a total installed CAPEX, then adds a simple OPEX (a fraction of CAPEX per year plus an annual energy cost) to produce a lifecycle total cost of ownership. It is intentionally simple and should guide users toward the validated NeqSim CostEstimationCalculator (Turton / Peters / Ulrich / Seider correlations with CEPCI escalation) and the NeqSim MCP runFieldEconomics workflow for real estimates.

When to Use

  • When a user wants a first-pass CAPEX and OPEX magnitude for a concept.
  • When an agent needs a cost feed for an asset-value / NPV screening chain.
  • When examples must run without confidential cost data or licensed estimating tools.

Inputs

  • bare_equipment_cost_musd: total bare (uninstalled) equipment cost in million USD.
  • installation_factor: Lang/Hand-style multiplier from bare to installed cost (default 3.5).
  • contingency_fraction: contingency added on top of installed cost (default 0.2).
  • opex_fraction_of_capex_per_year: annual OPEX as a fraction of total CAPEX (default 0.04).
  • annual_energy_use_mwh: optional annual energy use for the energy-cost term (default 0).
  • energy_price_usd_per_mwh: optional energy price (default 0).
  • project_life_years: number of years used for the lifecycle OPEX roll-up (default 20).

Outputs

  • installed_capex_musd: bare cost * installation factor.
  • total_capex_musd: installed CAPEX including contingency.
  • annual_opex_musd: OPEX-fraction term per year.
  • annual_energy_cost_musd: energy-cost term per year.
  • total_annual_opex_musd: sum of the two OPEX terms.
  • lifecycle_opex_musd: total annual OPEX times project life.
  • total_cost_of_ownership_musd: total CAPEX plus lifecycle OPEX.
  • capex_warning: ok, watch, or high (magnitude flag vs a configurable threshold).
  • neqsim_available: whether the optional NeqSim package is importable.
  • assumptions: public assumptions and required follow-up.

Read the full file on GitHub · 132 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 1mo ago First seen · 132 lines · 87 tokens per session scan A b576e6b06921

Subscribe to this mod's changes

neqsim-capex-opex-screening is a skill published in the GitHub repository equinor/neqsim-community-skills (4 stars, last pushed 4d ago), licensed Apache-2.0. It adds 87 tokens to every session and 1,384 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-19.

Finance and fintech
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