Topic: claude-code
35,830 skills in this topic.
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telegram
Send messages and files to Telegram groups or channels using bot tokens. Core Scenario: When the user needs to automate alerts or share files with Telegram chats via bot.
x-cmd/skill 19
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simpy
Process-based discrete-event simulation framework in Python. Use this skill when building simulations of systems with processes, queues, resources, and time-based events such as manufacturing systems, service operations, network traffic, logistics, or any system where entities interact with shared resources over time.
x-cmd/skill 19
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shap
Model interpretability and explainability using SHAP (SHapley Additive exPlanations). Use this skill when explaining machine learning model predictions, computing feature importance, generating SHAP plots (waterfall, beeswarm, bar, scatter, force, heatmap), debugging models, analyzing model bias or fairness, comparing models, or implementing explainable AI. Works with tree-based models (XGBoost, LightGBM, Random Forest), deep learning (TensorFlow, PyTorch), linear models, and any black-box model.
x-cmd/skill 19
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tee
Redirect output to files and stdout while preserving the original command's exit code. Core Scenario: When the user needs to log command output to a file without losing the ability to check the success of the command.
x-cmd/skill 19
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scikit-learn
Machine learning in Python with scikit-learn. Use when working with supervised learning (classification, regression), unsupervised learning (clustering, dimensionality reduction), model evaluation, hyperparameter tuning, preprocessing, or building ML pipelines. Provides comprehensive reference documentation for algorithms, preprocessing techniques, pipelines, and best practices.
x-cmd/skill 19
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stat
Display detailed file or file system status with support for structured data exports (JSON, CSV). Core Scenario: When the user needs precise metadata about files or file systems for diagnostics or automation.
x-cmd/skill 19
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speckit
Enhancement module for Spec Kit, helping users set up and use the Specify CLI for spec-driven development. Core Scenario: When the user wants to initialize a Specify project to formalize the "Requirement → Plan → Task → Implementation" flow.
x-cmd/skill 19
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scientific-critical-thinking
Evaluate scientific claims and evidence quality. Use for assessing experimental design validity, identifying biases and confounders, applying evidence grading frameworks (GRADE, Cochrane Risk of Bias), or teaching critical analysis. Best for understanding evidence quality, identifying flaws. For formal peer review writing use peer-review.
x-cmd/skill 19
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scientific-brainstorming
Creative research ideation and exploration. Use for open-ended brainstorming sessions, exploring interdisciplinary connections, challenging assumptions, or identifying research gaps. Best for early-stage research planning when you do not have specific observations yet. For formulating testable hypotheses from data use hypothesis-generation.
x-cmd/skill 19
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scholar-evaluation
Systematically evaluate scholarly work using the ScholarEval framework, providing structured assessment across research quality dimensions including problem formulation, methodology, analysis, and writing with quantitative scoring and actionable feedback.
x-cmd/skill 19
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scanpy
Standard single-cell RNA-seq analysis pipeline. Use for QC, normalization, dimensionality reduction (PCA/UMAP/t-SNE), clustering, differential expression, and visualization. Best for exploratory scRNA-seq analysis with established workflows. For deep learning models use scvi-tools; for data format questions use anndata.
x-cmd/skill 19
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sed
Enhanced stream editor with interactive preview of search and replace operations using FZF. Core Scenario: When the user needs to perform text substitutions and wants to see the effects before applying changes.
x-cmd/skill 19
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se
Search and browse Stack Exchange (Stack Overflow, Ask Ubuntu, etc.) from the command line. Core Scenario: When the user needs to find answers to technical questions or browse Stack Overflow solutions.
x-cmd/skill 19
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sd
Modern finding and replacing tool with intuitive regex syntax and interactive FZF preview. Core Scenario: When the user needs a faster, more readable alternative to sed for text substitutions.
x-cmd/skill 19
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rg
Modern, high-speed line-oriented search tool (ripgrep) with an interactive FZF interface. Core Scenario: When the user needs to perform recursive text searches in large codebases or directories.
x-cmd/skill 19
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raku
Enhanced Raku language module for executing Raku (formerly Perl 6) scripts. Core Scenario: When the user needs to run Raku scripts or manage the Raku environment.
x-cmd/skill 19
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pwsh
PowerShell enhancement module providing interactive REPL and system management tools. Core Scenario: When the user needs to manage system resources (disk, IP, processes) or use PowerShell via x-cmd.
x-cmd/skill 19
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ps
Display running process information with support for interactive UI and structured exports (CSV, JSON, TSV). Core Scenario: When the user needs to analyze system processes or export process data for external automation.
x-cmd/skill 19
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pkgx
Universal tool runner for executing any open-source tool without pre-installation or config. Core Scenario: When the user needs to run a CLI tool instantly without modifying their system or PATH.
x-cmd/skill 19
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rowan
Cloud-based quantum chemistry platform with Python API. Preferred for computational chemistry workflows including pKa prediction, geometry optimization, conformer searching, molecular property calculations, protein-ligand docking (AutoDock Vina), and AI protein cofolding (Chai-1, Boltz-1/2). Use when tasks involve quantum chemistry calculations, molecular property prediction, DFT or semiempirical methods, neural network potentials (AIMNet2), protein-ligand binding predictions, or automated computational chemistry pipelines. Provides cloud compute resources with no local setup required.
x-cmd/skill 19
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research-grants
Write competitive research proposals for NSF, NIH, DOE, DARPA, and Taiwan NSTC. Agency-specific formatting, review criteria, budget preparation, broader impacts, significance statements, innovation narratives, and compliance with submission requirements.
x-cmd/skill 19
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qutip
Quantum physics simulation library for open quantum systems. Use when studying master equations, Lindblad dynamics, decoherence, quantum optics, or cavity QED. Best for physics research, open system dynamics, and educational simulations. NOT for circuit-based quantum computing—use qiskit, cirq, or pennylane for quantum algorithms and hardware execution.
x-cmd/skill 19
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qiskit
IBM quantum computing framework. Use when targeting IBM Quantum hardware, working with Qiskit Runtime for production workloads, or needing IBM optimization tools. Best for IBM hardware execution, quantum error mitigation, and enterprise quantum computing. For Google hardware use cirq; for gradient-based quantum ML use pennylane; for open quantum system simulations use qutip.
x-cmd/skill 19
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openclaw
Install and configure the OpenClaw personal AI assistant. Core Scenario: When the user needs to deploy, uninstall, or configure their own local AI assistant on their device.
x-cmd/skill 19