entr
Run arbitrary commands when files change. Useful for watching files and triggering builds or tests.
Best use case
entr is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Run arbitrary commands when files change. Useful for watching files and triggering builds or tests.
Teams using entr should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/entr/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How entr Compares
| Feature / Agent | entr | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Run arbitrary commands when files change. Useful for watching files and triggering builds or tests.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# entr (Event Notify Test Runner) A utility for running arbitrary commands when files change. ## Usage `entr` takes a list of filenames from standard input and executes the utility specified as the first argument. ### Syntax ```bash <file_listing_command> | entr <utility> [arguments] ``` ### Options - `-c`: Clear the screen before invoking the utility. - `-r`: Reload a persistent child process (e.g., a server). - `-s`: Evaluate the first argument using the interpreter specified by `SHELL`. ## Examples **Rebuild project when sources change:** ```bash find src/ -name "*.c" | entr make ``` **Run tests when JS files change:** ```bash git ls-files | grep '\.js$' | entr npm test ``` **Auto-reload a Node server:** ```bash ls *.js | entr -r node app.js ``` ## Agent Notes `entr` blocks the terminal. When using it as an agent: 1. Use `process` tool to run it in the background if you need to do other things. 2. Or use it for a quick "watch mode" session where you intend to monitor output for a while.
Related Skills
portfolio-watcher
Monitor stock/crypto holdings, get price alerts, track portfolio performance
portainer
Control Docker containers and stacks via Portainer API. List containers, start/stop/restart, view logs, and redeploy stacks from git.
portable-tools
Build cross-device tools without hardcoding paths or account names
polymarket
Trade prediction markets on Polymarket. Analyze odds, place bets, track positions, automate alerts, and maximize returns from event outcomes. Covers sports, politics, entertainment, and more.
polymarket-traiding-bot
No description provided.
polymarket-analysis
Analyze Polymarket prediction markets for trading edges. Pair Cost arbitrage, whale tracking, sentiment analysis, momentum signals, user profile tracking. No execution.
polymarket-agent
Autonomous prediction market agent - analyzes markets, researches news, and identifies trading opportunities
polymarket-5
Query Polymarket prediction markets. Use for questions about prediction markets, betting odds, market prices, event probabilities, or when user asks about Polymarket data.
polymarket-4
Query Polymarket prediction markets. Use for questions about prediction markets, betting odds, market prices, event probabilities, or when user asks about Polymarket data.
polymarket-3
Query Polymarket prediction market odds and events via CLI. Search for markets, get current prices, list events by category. Supports sports betting (NFL, NBA, soccer/EPL, Champions League), politics, crypto, elections, geopolitics. Real money markets = more accurate than polls. No API key required. Use when asked about odds, probabilities, predictions, or "what are the chances of X".
polymarket-2
Query Polymarket prediction markets - check odds, trending markets, search events, track prices.
pollinations
Pollinations.ai API for AI generation - text, images, videos, audio, and analysis. Use when user requests AI-powered generation (text completion, images, videos, audio, vision/analysis, transcription) or mentions Pollinations. Supports 25+ models (OpenAI, Claude, Gemini, Flux, Veo, etc.) with OpenAI-compatible chat endpoint and specialized generation endpoints.