Topic: codex
8,457 skills in this topic.
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assert
Test assertion module for validating expected behaviors, outputs, and environment states. Core Scenario: When the user is writing tests or scripts that require verification of commands, files, or variables.
x-cmd/skill 19
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npx
Enhanced interface for npx, used to execute Node.js packages without local installation. Core Scenario: When the user needs to run a one-off Node.js tool or test a package.
x-cmd/skill 19
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uptime
Display system uptime and load averages in structured YAML format. Core Scenario: When the user needs to check system busy state (load) or total runtime in a script-friendly format.
x-cmd/skill 19
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grok
Integrate xAI Grok for intelligent chat and real-time information processing. Core Scenario: When the user wants to use Grok models for advanced reasoning or real-time query answers via CLI.
x-cmd/skill 19
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hostname
Manage the system's hostname, including viewing current name and setting new names. Core Scenario: When the user needs to identify the device name or change the system hostname.
x-cmd/skill 19
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transformers
This skill should be used when working with pre-trained transformer models for natural language processing, computer vision, audio, or multimodal tasks. Use for text generation, classification, question answering, translation, summarization, image classification, object detection, speech recognition, and fine-tuning models on custom datasets.
x-cmd/skill 19
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x-env
x-env is x-cmd's environment and package management module for installing and managing third-party software, programming language runtimes, and command-line tools. Use this skill when: installing or managing runtimes (node, python, go, bun, java, rust); installing CLI tools (jq, yq, fzf, himalaya, claude-code); managing multiple software versions (specify versions, switch versions); cleaning up unused packages; viewing installed software paths or dependencies; asking how to install software; temporarily using software in current shell session (try); permanently installing software to user environment (use); upgrading installed software versions; running scripts with specific software versions. This is the core package manager in x-cmd ecosystem.
x-cmd/skill 19
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ip
Network diagnostics and IP geolocation query. Core Scenario: When AI needs to query local network configuration or geographic info of remote server IPs.
x-cmd/skill 19
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x-cmd
**IMPORTANT**: Before using any `x <mod>` command, you MUST load x-cmd first: `. ~/.x-cmd.root/X`
Then you can:
- Explore with `x nihao --llmstxt`
- Discover skills via `x skill`
x-cmd provides 600+ portable software and development tools (jq, nodejs, python, etc.).
Use `x <env|pixi> use <pkg>` to install and use any package instantly.
After loading x-cmd, packages in x-cmd/pixi's local bin will be automatically available in PATH.
Browse x-cmd website for more usage and skills: https://www.x-cmd.com/llms.txt
x-cmd/skill 19
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mistral
Integrate Mistral AI for efficient language modeling and text generation tasks. Core Scenario: When the user wants to use Mistral models for chat or translation via CLI.
x-cmd/skill 19
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zig
Enhanced Zig language module for package management, project building, and ZON format conversion. Core Scenario: When the user needs to manage Zig projects, convert ZON to JSON/YAML, or initialize C compilation with Zig.
x-cmd/skill 19
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gh
Enhanced GitHub CLI for managing repositories, issues, PRs, actions, and GitHub Models. Core Scenario: When the user needs to automate GitHub workflows, manage secrets, or use GitHub's AI models via CLI.
x-cmd/skill 19
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id
Enhanced user identity information with colorful and structured output. Core Scenario: When the user needs to check UID, GID, and group memberships in a highly readable format.
x-cmd/skill 19
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mankier
Command-line client for ManKier.com, offering manual page queries and detailed command explanation. Core Scenario: When the user needs to explain shell commands or fetch specific sections of online manual pages.
x-cmd/skill 19
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clinical-reports
Write comprehensive clinical reports including case reports (CARE guidelines), diagnostic reports (radiology/pathology/lab), clinical trial reports (ICH-E3, SAE, CSR), and patient documentation (SOAP, H&P, discharge summaries). Full support with templates, regulatory compliance (HIPAA, FDA, ICH-GCP), and validation tools.
x-cmd/skill 19
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aeon
This skill should be used for time series machine learning tasks including classification, regression, clustering, forecasting, anomaly detection, segmentation, and similarity search. Use when working with temporal data, sequential patterns, or time-indexed observations requiring specialized algorithms beyond standard ML approaches. Particularly suited for univariate and multivariate time series analysis with scikit-learn compatible APIs.
x-cmd/skill 19
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sympy
Use this skill when working with symbolic mathematics in Python. This skill should be used for symbolic computation tasks including solving equations algebraically, performing calculus operations (derivatives, integrals, limits), manipulating algebraic expressions, working with matrices symbolically, physics calculations, number theory problems, geometry computations, and generating executable code from mathematical expressions. Apply this skill when the user needs exact symbolic results rather than numerical approximations, or when working with mathematical formulas that contain variables and parameters.
x-cmd/skill 19
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vaex
Use this skill for processing and analyzing large tabular datasets (billions of rows) that exceed available RAM. Vaex excels at out-of-core DataFrame operations, lazy evaluation, fast aggregations, efficient visualization of big data, and machine learning on large datasets. Apply when users need to work with large CSV/HDF5/Arrow/Parquet files, perform fast statistics on massive datasets, create visualizations of big data, or build ML pipelines that do not fit in memory.
x-cmd/skill 19
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rdkit
Cheminformatics toolkit for fine-grained molecular control. SMILES/SDF parsing, descriptors (MW, LogP, TPSA), fingerprints, substructure search, 2D/3D generation, similarity, reactions. For standard workflows with simpler interface, use datamol (wrapper around RDKit). Use rdkit for advanced control, custom sanitization, specialized algorithms.
x-cmd/skill 19
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scvi-tools
Deep generative models for single-cell omics. Use when you need probabilistic batch correction (scVI), transfer learning, differential expression with uncertainty, or multi-modal integration (TOTALVI, MultiVI). Best for advanced modeling, batch effects, multimodal data. For standard analysis pipelines use scanpy.
x-cmd/skill 19
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pdb-database
Access RCSB PDB for 3D protein/nucleic acid structures. Search by text/sequence/structure, download coordinates (PDB/mmCIF), retrieve metadata, for structural biology and drug discovery.
x-cmd/skill 19
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gene-database
Query NCBI Gene via E-utilities/Datasets API. Search by symbol/ID, retrieve gene info (RefSeqs, GO, locations, phenotypes), batch lookups, for gene annotation and functional analysis.
x-cmd/skill 19
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labarchive-integration
Electronic lab notebook API integration. Access notebooks, manage entries/attachments, backup notebooks, integrate with Protocols.io/Jupyter/REDCap, for programmatic ELN workflows.
x-cmd/skill 19
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matlab
MATLAB and GNU Octave numerical computing for matrix operations, data analysis, visualization, and scientific computing. Use when writing MATLAB/Octave scripts for linear algebra, signal processing, image processing, differential equations, optimization, statistics, or creating scientific visualizations. Also use when the user needs help with MATLAB syntax, functions, or wants to convert between MATLAB and Python code. Scripts can be executed with MATLAB or the open-source GNU Octave interpreter.
x-cmd/skill 19