spatial-de

spatial-de is a skill for Claude Code, Codex from TianGzlab/OmicsClaw. It costs 48 tokens per session (1,155 once invoked), scanned A, original, Apache-2.0.

A differential-expression tool for spatial transcriptomics data. Differential expression means finding genes that differ between groups, such as tissue clusters or experimental conditions.

In plain words
What is it for?
Use it to rank cluster markers or run two-group comparisons on Visium, Xenium, MERFISH, or Slide-seq AnnData data.
Why use it?
It helps reveal marker genes for spatial clusters and gene changes between two groups while accounting for biological replicates when comparing conditions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to rank cluster markers or run two-group comparisons on Visium, Xenium, MERFISH, or Slide-seq AnnData data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tiangzlab/omicsclaw/spatial-de
Install

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.

Any agent
npx skills add TianGzlab/OmicsClaw --skill spatial-de
Clone the repo
git clone --depth 1 https://github.com/TianGzlab/OmicsClaw

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for spatial-de

README.md
[![agentmods](https://agentmods.dev/badge/skills/tiangzlab/omicsclaw/spatial-de/github.svg)](https://agentmods.dev/skills/tiangzlab/omicsclaw/spatial-de)
Your own site
<a href="https://agentmods.dev/skills/tiangzlab/omicsclaw/spatial-de"><img src="https://agentmods.dev/badge/skills/tiangzlab/omicsclaw/spatial-de/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.

agentmods 80×15 button for spatial-de

Your own site · 80×15
<a href="https://agentmods.dev/skills/tiangzlab/omicsclaw/spatial-de"><img src="https://agentmods.dev/badge/skills/tiangzlab/omicsclaw/spatial-de.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,155 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
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 Rogue Agent · line 3
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.01155
Opus 5.5 $0.00019 $0.00462
Sonnet 5.5 $0.00010 $0.00231
Haiku 4.5 $0.00005 $0.00115

Measured 14d ago against content hash 0ba13a8cbaa7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spatial-de 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 14d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (_api.py, examples/example_step.py, spatial_de.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/spatial/spatial-de/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

spatial-de

When to use

Rank spatial group markers with Wilcoxon or t-test, or compare conditions with sample-aware PyDESeq2 pseudobulk. Biological sample labels are required; spatial spots do not supply independent replicates.

Use from a step

from skills._sdk.notebook import load_skill, read_input, write_output
library = load_skill("spatial-de")
adata = read_input("processed.h5ad")
library.differential_expression(adata, groupby="leiden")
write_output(library.results(adata), "tables/de_full.csv")

The executable example checks known markers in simulated spatial domains.

API

differential_expression(adata, *, method='wilcoxon', groupby='leiden', group1=None, group2=None, n_top_genes=10, fdr_threshold=0.05, log2fc_threshold=1.0, **parameters)

Test groups and return the same AnnData, with results in its diagnostics.

Scanpy uses raw when present, otherwise log-normalized X. PyDESeq2 uses counts, then raw, then X; provide integer counts and biological samples.

:param adata: Expression and group labels; modified in place. :param method: CLI default wilcoxon; t-test or pydeseq2 for other tests. :param groupby: CLI default leiden; obs column defining comparisons. :param group1: Tested group, or None for each group versus rest. :param group2: Reference group; supply together with group1. :param n_top_genes: CLI default 10 marker genes per group. :param fdr_threshold: CLI default 0.05 adjusted-p-value threshold. :param log2fc_threshold: CLI default 1.0 effect-size threshold. :param parameters: Method-specific CLI parameters from references/parameters.md. :returns: The same AnnData; results returns the full result table. :raises ValueError: Groups, method or sample replication are invalid. :raises ImportError: PyDESeq2 is unavailable; use install_skill_deps.

results(adata, *, markers_only=False)

Return the full or selected marker table without changing expression.

Read the full file on GitHub · 127 lines

Changes

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.

  1. 14d ago Changed · +1 lines · -3 tokens per session 0ba13a8cbaa7
  2. 1mo ago First seen · 126 lines · 51 tokens per session scan A 5c579d367198

Subscribe to this mod's changes

spatial-de is a skill published in the GitHub repository TianGzlab/OmicsClaw (161 stars, last pushed 14d ago), licensed Apache-2.0. It adds 48 tokens to every session and 1,155 once invoked, about $0.0002 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.