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 pjt222/agent-almanac --skill analyze-magnetic-fieldgit clone --depth 1 https://github.com/pjt222/agent-almanacWrote 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/pjt222/agent-almanac/analyze-magnetic-field)<a href="https://agentmods.dev/skills/pjt222/agent-almanac/analyze-magnetic-field"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/analyze-magnetic-field/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/pjt222/agent-almanac/analyze-magnetic-field"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/analyze-magnetic-field.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Memory Poisoning · line 101 Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
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 | $0.00079 | $0.03689 |
| Opus 5.5 | $0.00032 | $0.01476 |
| Sonnet 5.5 | $0.00016 | $0.00738 |
| Haiku 4.5 | $0.00008 | $0.00369 |
Grade A, and why
analyze-magnetic-field 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.
How it starts
The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Analyze Magnetic Field
Calculate the magnetic field produced by a given current distribution by characterizing the source geometry, selecting the appropriate law (Biot-Savart for arbitrary geometries, Ampere's law for high-symmetry configurations), evaluating field integrals, checking limiting cases, incorporating magnetic material effects where relevant, and visualizing the resulting field-line topology.
When to Use
- Computing the B-field from an arbitrary current-carrying conductor (wire loop, helix, irregular path)
- Exploiting cylindrical, planar, or toroidal symmetry to apply Ampere's law directly
- Estimating far-field behavior via the magnetic dipole approximation
- Superposing fields from multiple current sources
- Analyzing magnetic materials: linear permeability, B-H curves, hysteresis, saturation
Inputs
- Required: Current distribution specification (geometry, current magnitude and direction)
- Required: Region of interest where the field is needed (observation points or volume)
- Optional: Material properties (relative permeability, B-H curve data, coercivity, remanence)
- Optional: Desired accuracy level (exact integral, multipole expansion order, numerical resolution)
- Optional: Visualization requirements (2D cross-section, 3D field lines, magnitude contour map)
Procedure
Step 1: Characterize Current Distribution and Geometry
Fully specify the source before selecting a method:
- Current path: Describe the geometry of every current-carrying element. For line currents, specify the path as a parametric curve r'(t). For surface currents, specify the surface current density K (A/m). For volume currents, specify J (A/m^2).
- Coordinate system: Choose coordinates aligned with the dominant symmetry. Cylindrical (rho, phi, z) for wires and solenoids. Spherical (r, theta, phi) for dipoles and loops at large distances. Cartesian for planar sheets.
- Symmetry analysis: Identify translational, rotational, and reflection symmetries. A symmetry of the source is a symmetry of the field. Document which components of B are nonzero by symmetry and which vanish.
- Current continuity: Verify that the current distribution satisfies div(J) = 0 (steady state) or div(J) = -d(rho)/dt (time-varying). Inconsistent current distributions produce unphysical fields.
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 · 239 lines · 79 tokens per session scan A e98aa7a8c0dc
analyze-magnetic-field is a skill published in the GitHub repository pjt222/agent-almanac (42 stars, last pushed 4d ago), licensed MIT. It adds 79 tokens to every session and 3,689 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 2026-09-03.
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