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 skills add agentlas-ai/agentlas-desktop --skill fluidsimgit clone --depth 1 https://github.com/agentlas-ai/agentlas-desktopWrote 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/agentlas-ai/agentlas-desktop/fluidsim)<a href="https://agentmods.dev/skills/agentlas-ai/agentlas-desktop/fluidsim"><img src="https://agentmods.dev/badge/skills/agentlas-ai/agentlas-desktop/fluidsim/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/agentlas-ai/agentlas-desktop/fluidsim"><img src="https://agentmods.dev/badge/skills/agentlas-ai/agentlas-desktop/fluidsim.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00054 | $0.03255 |
| Opus 5.5 | $0.00022 | $0.01302 |
| Sonnet 5.5 | $0.00011 | $0.00651 |
| Haiku 4.5 | $0.00005 | $0.00326 |
Grade A, and why
fluidsim 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.
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.
This is a copy
91% identical to fluidsim — 40 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 297 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FluidSim
Use FluidSim 0.9.0 as a framework for Python-defined numerical solvers, especially periodic Cartesian pseudospectral CFD. Upstream FluidSim is CeCILL-2.1; the MIT frontmatter license applies only to this skill.
This skill does not treat a completed run, a stable time step, a smooth plot, or a closed program exit as evidence of numerical convergence or physical validity.
Required workflow
- State equations, units or nondimensionalization, geometry, boundaries, initial conditions, forcing, observables, and acceptance criteria.
- Select a verified solver and inspect its generated default parameters.
- Create a strict JSON plan with explicit CPU, RAM, disk, wall-time, output-file, timestep, CFL, resolution, and dealiasing bounds.
- Run the bundled validator and resource estimator.
- Generate and review a dry-run script. It does nothing unless executed with an explicit config-ID acknowledgement.
- Run one tiny serial pilot. Inspect budgets, divergence/constraints, spectral tails, CFL/time-step history, and output growth.
- Refine grid and time step independently. Check conservation/budget residuals and observable sensitivity.
- Only then prepare a site-specific MPI job. Never submit or launch MPI automatically.
- Preserve config, script,
uv.lock, package/platform/backend versions, logs, output inventory, checksums, and restart lineage.
Stop if physical assumptions, units, boundary conditions, forcing semantics, resolution criteria, resource limits, or acceptance criteria are missing.
Version and installation
As verified on 2026-07-23:
- Latest stable PyPI release:
fluidsim==0.9.0(2025-12-04). - Package metadata requires Python
>=3.11and lists Python 3.11–3.14. - Pseudospectral parameter creation needs FluidFFT; bare
fluidsimimported in the smoke test, butns2d.create_default_params()failed until thefftextra was installed. - Current companion versions tested here:
fluidfft==0.4.5andpyFFTW==0.15.1.
What ships with it
15 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.
- references/advanced_features.md 11 KB
- references/installation.md 9.5 KB
- references/output_analysis.md 9.9 KB
- references/parameters.md 10.0 KB
- references/simulation_workflow.md 11 KB
- references/solvers.md 7.8 KB
- scripts/__init__.py 74 B runs code
- scripts/_common.py 15 KB runs code
- scripts/_schema.py 28 KB runs code
- scripts/budget_summary.py 13 KB runs code
- scripts/grid_resource_estimator.py 8.8 KB runs code
- scripts/output_inventory.py 11 KB runs code
- scripts/restart_compatibility.py 15 KB runs code
- scripts/simulation_dry_run.py 7.6 KB runs code
- scripts/solver_config_validator.py 2.1 KB runs code
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.
- 1mo ago First seen · 297 lines · 54 tokens per session scan A d616bf694c9b
fluidsim is a skill published in the GitHub repository agentlas-ai/agentlas-desktop (6 stars, last pushed yesterday), licensed Apache-2.0. It adds 54 tokens to every session and 3,255 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 91% identical to fluidsim, differing in 40 lines, and is treated as a copy.
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