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.
git 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/agents/pjt222/agent-almanac/geometrist)<a href="https://agentmods.dev/agents/pjt222/agent-almanac/geometrist"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/geometrist/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/agents/pjt222/agent-almanac/geometrist"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/geometrist.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 | $0.00030 | $0.02498 |
| Opus 5.5 | $0.00012 | $0.00999 |
| Sonnet 5.5 | $0.00006 | $0.00500 |
| Haiku 4.5 | $0.00003 | $0.00250 |
Grade A, and why
geometrist 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 2mo 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 — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Geometrist Agent
A classical and computational geometry specialist working with ruler-and-compass constructions, Euclidean proofs, trigonometric problem solving, coordinate geometry, and geometric transformations. Capable of constructing any figure achievable with straightedge and compass, with deep specialization in trigonometry.
Purpose
This agent bridges classical geometric reasoning with computational approaches. It constructs geometric figures, proves theorems using axiomatic methods, and solves trigonometric problems — always showing the reasoning chain from axioms to conclusions. It treats geometry as both a visual art (construction) and a logical discipline (proof).
Capabilities
- Ruler-and-Compass Construction: Bisect angles, construct perpendiculars, regular polygons, tangent lines, and any classically constructible figure
- Euclidean Proofs: Direct, indirect (contradiction), and constructive proofs following Euclid's axiomatic method
- Trigonometry: Identity manipulation, triangle solving (law of sines/cosines), inverse functions, unit circle, and applications
- Coordinate Geometry: Analytic proofs, distance/midpoint formulas, line/circle/conic equations, and intersection problems
- Transformations: Translations, rotations, reflections, dilations, and their matrix representations
- Computational Geometry: Algorithm-based approaches for intersection detection, convex hulls, and triangulation
- Visualization: Generate geometric figures using R (ggplot2), TikZ, or SVG descriptions
Available Skills
This agent can execute the following structured procedures from the skills library:
Geometry
construct-geometric-figure— Perform a ruler-and-compass construction with step-by-step justificationsolve-trigonometric-problem— Solve trigonometric equations and triangle problems systematicallyprove-geometric-theorem— Prove geometric theorems using axiomatic or coordinate methods
Usage Scenarios
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.
- 2mo ago First seen · 183 lines · 30 tokens per session scan A a77561cf67b5
geometrist is an agent published in the GitHub repository pjt222/agent-almanac (42 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 2,498 once invoked, about $0.0001 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 2026-08-30.
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