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 Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysisgit clone --depth 1 https://github.com/Cai-aa/CAE-Agent-HubWrote 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/cai-aa/cae-agent-hub/abaqus-modal-analysis)<a href="https://agentmods.dev/skills/cai-aa/cae-agent-hub/abaqus-modal-analysis"><img src="https://agentmods.dev/badge/skills/cai-aa/cae-agent-hub/abaqus-modal-analysis/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/cai-aa/cae-agent-hub/abaqus-modal-analysis"><img src="https://agentmods.dev/badge/skills/cai-aa/cae-agent-hub/abaqus-modal-analysis.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 | $0.00028 | $0.01201 |
| Opus 5 | $0.00014 | $0.00600 |
| Sonnet 5 | $0.00006 | $0.00240 |
| Haiku 4.5 | $0.00003 | $0.00120 |
Grade A, and why
abaqus-modal-analysis 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 — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Abaqus Modal Analysis Skill
Extract natural frequencies and mode shapes from a structure. Use for vibration analysis, resonance avoidance, and dynamic characterization.
When to Use This Skill
Route here when user mentions:
- "Natural frequency", "modal analysis", "vibration"
- "Resonance", "mode shapes", "eigenvalue"
- "How will it vibrate?", "avoid resonance at X Hz"
- "First mode frequency", "natural frequency of beam/plate"
Route elsewhere:
- Forced vibration response → use transient dynamic
- Frequency response function → use steady-state dynamics
- Static stress/deflection →
/abaqus-static-analysis - Impact/crash →
/abaqus-dynamic-analysis
Prerequisites
Before modal analysis:
- Geometry and mesh ready
- Material MUST have density defined (required for mass matrix)
- Boundary conditions define the modal boundary
- NO loads needed for eigenvalue extraction
Workflow: Modal Analysis
Step 1: Understand User's Goal
Ask if unclear:
- How many modes? First few (5-10) or all in frequency range?
- Boundary conditions? Fixed, pinned, free-free?
- Frequency range of interest? Motor at 60 Hz, etc.?
- What geometry? Beam, plate, bracket, assembly?
Step 2: Create Geometry
Route to /abaqus-geometry for part creation.
Step 3: Define Material WITH DENSITY
Route to /abaqus-material - density is essential.
Without density, Abaqus cannot compute the mass matrix and modal analysis will fail.
| Material | Density (tonne/mm^3) |
|---|---|
| Steel | 7.85e-9 |
| Aluminum | 2.7e-9 |
| Titanium | 4.5e-9 |
Step 4: Create Mesh
Route to /abaqus-mesh for meshing.
Mesh quality affects mode shapes - finer mesh gives more accurate high-frequency modes.
Step 5: Apply Boundary Conditions
Route to /abaqus-bc to define support type.
| Configuration | Expected Modes | Use Case |
|---|---|---|
| Free-free (no BCs) | 6 rigid body modes at ~0 Hz, then elastic | Test correlation |
| Cantilever (one end fixed) | First mode is bending | Mounted component |
| Simply supported | Bending, plate modes | Bridge-like structures |
| Fixed-fixed | Higher frequencies than cantilever | Both ends constrained |
What ships with it
3 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.
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 · 149 lines · 28 tokens per session scan A 3def5b4aa59f
abaqus-modal-analysis is a skill published in the GitHub repository Cai-aa/CAE-Agent-Hub (868 stars, last pushed 4d ago), licensed MIT. It adds 28 tokens to every session and 1,201 once invoked, about $0.0001 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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