productivity▌

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Write correct n8n expressions with double braces, proper variable syntax, and webhook data access patterns. \n \n Use {{}} syntax for all dynamic content; access current node data with $json , other nodes with $node[\"Node Name\"] , and webhook payloads from $json.body (not root) \n Node names are case-sensitive and require quotes; field names with spaces use bracket notation like $json['field name'] \n Code nodes use direct JavaScript access without {{}} braces; expressions don't work in webhoo

$22

Safe, reversible database schema changes for production systems. \n \n Covers PostgreSQL, MySQL, and five major ORMs (Prisma, Drizzle, Django, TypeORM, golang-migrate) with workflow examples and schema patterns for each \n Enforces core principles: immutable deployed migrations, forward-only production rollbacks, and separation of schema (DDL) from data (DML) migrations \n Provides the expand-contract pattern for zero-downtime column renames and large refactors, with concrete timeline examples \

Slash commands are frequently-used prompts defined as Markdown files that Claude executes during interactive sessions. Understanding command structure, frontmatter options, and dynamic features enables creating powerful, reusable workflows.

This skill provides procedural guidance for configuring GitHub secret scanning — detecting leaked credentials, preventing secret pushes, defining custom patterns, and managing alerts.

Text-to-speech with dual backends, voice cloning, and timeline-accurate audio synthesis for dubbing and video narration. \n \n Supports two backends: Kokoro (local, offline) for simple speech synthesis, and Noiz (cloud) for voice cloning, emotion control, and precise segment timing \n Simple mode converts text, files, or URLs to audio with optional voice cloning from reference audio; timeline mode aligns speech to SRT subtitles with per-segment voice and emotion control \n Voice maps enable gran

Command-line interface for creating, updating, and querying Linear issues with git and jj integration. \n \n Covers 11+ command categories including issues, teams, projects, cycles, milestones, initiatives, labels, and documents \n Supports file-based flags for markdown content to ensure proper formatting and avoid shell escaping issues \n Includes direct GraphQL API access via the api command for operations not covered by the CLI, with schema inspection tools \n Requires the linear CLI tool to

PyMC is a Python library for Bayesian modeling and probabilistic programming. Build, fit, validate, and compare Bayesian models using PyMC's modern API (version 5.x+), including hierarchical models, MCMC sampling (NUTS), variational inference, and model comparison (LOO, WAIC).

Frameworks and best practices for clear, professional communication across emails, team chat, meetings, and technical audiences. \n \n Covers four core areas: the What-Why-How structure for organizing messages, email templates with subject line formulas, team messaging etiquette including the \"no hello\" principle, and strategies for translating technical concepts to non-technical audiences \n Includes audience calibration guidance, jargon-to-plain-language translation examples, and clarity pri