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 aristoteleo/PantheonOS --skill segmentationgit clone --depth 1 https://github.com/aristoteleo/PantheonOSWrote 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/aristoteleo/pantheonos/segmentation)<a href="https://agentmods.dev/skills/aristoteleo/pantheonos/segmentation"><img src="https://agentmods.dev/badge/skills/aristoteleo/pantheonos/segmentation.svg" alt="Measured on agentmods" 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 | $0.00035 | $0.00845 |
| Opus 5 | $0.00017 | $0.00423 |
| Sonnet 5 | $0.00007 | $0.00169 |
| Haiku 4.5 | $0.00003 | $0.00085 |
Grade A, and why
Cell Segmentation Skills Index 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 7d 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 — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cell & Nucleus Segmentation Skills
Instance segmentation tools for cells and nuclei in microscopy images. Use the tool selection guide below to choose the right method, then load the corresponding skill file for detailed usage.
Tool Selection Guide
| Goal | Recommended Tool | Speed | Tested |
|---|---|---|---|
| Best overall accuracy | Cellpose-SAM (v4.x) | Moderate (~310s/1024px CPU) | ✅ 955 cells |
| Fastest inference | InstanSeg | Fast (~7s/1024px CPU) | ✅ 586 cells |
| Low quality / noisy images | Cellpose 3 (image restoration) | Moderate | ✅ |
| Round nuclei only | StarDist | Fastest (~0.5s) | ✅ 150 cells |
| Whole-cell (nucleus + membrane) | Mesmer / DeepCell | Moderate | ⚠️ install issues |
| Interactive annotation / 3D / tracking | micro-sam | Slow | ⚠️ Python 3.10+ |
| Fully automatic, no prompts | CellSAM | Moderate | ⚠️ Python 3.10+ |
[!TIP] Start with Cellpose (default in v4.x) for most tasks. It has the best generalization. Switch to InstanSeg if speed matters or you need simultaneous nuclei + cell masks.
[!WARNING] Environment isolation is important. These tools have conflicting dependencies. Cellpose/InstanSeg use PyTorch; StarDist/Mesmer use TensorFlow; SAM-based tools need Python 3.10+. Create separate virtual environments for each tool family:
venv-cellpose: Cellpose + InstanSeg (both PyTorch)venv-stardist: StarDist (TensorFlow,numpy<2)venv-deepcell: Mesmer/DeepCell (TensorFlow, strict numpy version)venv-sam: micro-sam / CellSAM (Python 3.10+)
Available Skills
Cellpose
General-purpose cell and nucleus segmentation using Cellpose v4.x (includes Cellpose-SAM with ViT-L backbone). Image restoration, fine-tuning, and 3D segmentation.
Skill file: cellpose.md
When to use: Default choice for most segmentation tasks.
InstanSeg
Fast cell and nucleus segmentation with dual output (nuclei + cells simultaneously). Supports multiplexed images via ChannelNet.
What ships with it
5 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.
- 7d ago First seen · 90 lines · 35 tokens per session scan A ca54ceecd656
Cell Segmentation Skills Index is a skill published in the GitHub repository aristoteleo/PantheonOS (482 stars, last pushed 4d ago), licensed BSD-2-Clause. It adds 35 tokens to every session and 845 once invoked, about $0.0002 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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