Execute system commands and manage processes using Effect's Command module from @effect/platform. Use this skill when spawning child processes, running shell commands, capturing command output, or managing long-running processes with cleanup.
Python coding conventions and best practices. Use when writing, reviewing, or refactoring Python code, or when working with Python scripts and projects.
Use @effect/platform abstractions for cross-platform file I/O, process spawning, HTTP clients, and terminal operations. Apply this skill when writing code that interacts with the filesystem, spawns processes, makes HTTP requests, or performs console I/O to ensure portability across Node.js, Bun, and browser environments.
Best practices for writing shell scripts. Use when writing bash, sh, zsh, or other shell code for automation, scripting, or command-line tasks.
Algorithms for working with AsyncSequence: combining, throttling, debouncing, chunking, and more
Run Codex subagents in parallel. Main sandbox can be read-only / workspace-write / danger-full-access; children stay read-only or workspace-write and each requires an absolute working dir (workspace-write children must stay under the main cwd unless main is danger).
Pipe long running commands through tee(1) to allow watching output and repeated analyses without rerunning
Helps you to run a subagent using codex exec
Bash scripting best practices for production-grade scripts, CLI tools, and Makefiles. Covers strict mode, error handling, portability, performance patterns, and argument parsing. Use when working with .sh files, Makefiles, shell scripts, or when asking about Bash, shell scripting, CLI design, or command-line tools.
Creates slash commands for repeated workflows. Use when defining batch processing, pipelines, or checklist-based automation.
Execution discipline skill adapted from obra/superpowers. Ensures plans translate into tracked tasks, orchestration, and verification runs.
Essential patterns, idioms, and gotchas for writing Nushell code. Use when writing Nushell scripts, functions, or working with Nushell's type system, pipelines, and data structures. Complements plugin development knowledge with practical usage patterns.
Process substitution, named pipes (FIFOs), and advanced IPC patterns for efficient bash data streaming (2025)
PowerShell 7.5/7.6 features and enhancements. PROACTIVELY activate for: (1) PowerShell 7.5 stable features, (2) PowerShell 7.6 preview features, (3) ConvertTo-CliXml/ConvertFrom-CliXml, (4) Test-Path -OlderThan/-NewerThan, (5) += operator optimization (8x-16x faster), (6) PSResourceGet 1.1.1/1.2.0, (7) Get-Clipboard -Delimiter, (8) Get-Command -ExcludeModule, (9) DSC v3 resources, (10) .NET 9/.NET 10 integration. Provides: Latest cmdlet usage, performance benchmarks, migration patterns.
Advanced bash string manipulation including parameter expansion, pattern matching, regex, and text processing (2025)
Persistent browser automation via Playwright daemon. Keep a browser window open and send it commands (navigate, execute JS, inspect console). Perfect for interactive debugging, development, and testing web applications. Use when you need to interact with a browser repeatedly without opening/closing it.
Shell detection and cross-shell compatibility guidance for PowerShell vs Git Bash/MSYS2 on Windows
Bash 5.3 new features and modern patterns (2025)
Shell scripting standards and safety practices. Use when language shell guidance is required or when selecting Shell as a thin wrapper or OS-near glue layer.
Parallel and concurrent processing patterns in bash including GNU Parallel, xargs, job pools, and async patterns (2025)
Complete PowerShell expertise system across ALL platforms (Windows/Linux/macOS). PROACTIVELY activate for: (1) ANY PowerShell task (scripts/modules/cmdlets), (2) CI/CD automation (GitHub Actions/Azure DevOps/Bitbucket), (3) Cross-platform scripting, (4) Module discovery and management (PSGallery), (5) Azure/AWS/Microsoft 365 automation, (6) Script debugging and optimization, (7) Best practices and security. Provides: PowerShell 7+ features, popular module expertise (Az, Microsoft.Graph, PnP, AWS Tools), PSGallery integration, platform-specific guidance, CI/CD pipeline patterns, cmdlet syntax mastery, and production-ready scripting patterns. Ensures professional-grade, cross-platform PowerShell automation following industry standards.
Advanced bash array patterns including mapfile, readarray, associative arrays, and array manipulation (2025)
Complete Python asyncio system. PROACTIVELY activate for: (1) async/await syntax, (2) asyncio.gather for concurrent execution, (3) TaskGroup (3.11+), (4) Semaphores for rate limiting, (5) Timeouts with asyncio.timeout, (6) Producer-consumer with Queue, (7) Async generators and context managers, (8) uvloop performance, (9) Common async gotchas. Provides: Concurrent patterns, I/O optimization, async libraries (aiohttp, httpx, asyncpg). Ensures correct async patterns without blocking.
