Agent skill · software engineering · jeremylongshore
clade-local-dev-loop
Set up a fast local development loop for building with the Anthropic\
Why this skill is useful
Provides a comprehensive setup guide with specific commands and cost-saving patterns for using the Anthropic API that the AI wouldn't reliably generate on its own.
What it needs
Requires node, python installed locally. Requires anthropic account access. About 2k tokens when loaded. Last updated 2026-08-07. 2,604 stars on the source repository.
What this skill does
Anthropic Local Dev Loop Overview Set up a fast, cheap development workflow for building with Claude. Prerequisites Node.js 18+ or Python 3.10+ ANTHROPICAPIKEY environment variable set npm or pip package manager Instructions Step 1: Project Setup Step 2: Create a Test Script Step 3: Run with Hot Reload Cost-Saving Dev Tips Tip Savings ----- --------- Use claude-haiku-4-5-20251001 during development 20x cheaper than Opus Set maxtokens: 256 for testing Fewer output tokens billed Cache your system prompt with prompt caching beta 90% off cached input tokens Use Message Batches for bulk testing (50% off) Half price, 24h turnaround Log responses locally so you don't re-call for the same input 100% savings on repeats Mock Client for Unit Tests Python Dev Loop Output Project scaffolded with SDK, dotenv, and tsx for hot reload Test script running against Claude Haiku (cheapest model) Mock client available for unit tests without API calls Cost estimate printed per request Error Handling Issue Fix ------- ----- ANTHROPICAPIKEY not loading Make sure dotenv/config is imported first Slow iteration Use Haiku, reduce maxtokens High dev costs Log responses, use mocks for unit tests Examples See Step 1 (project setup), Step 2 (test script with cost tracking), Step 3 (hot reload), Mock Client section, and Python Dev Loop section above. Resources Quickstart Guide TypeScript SDK Next Steps See clade-sdk-patterns for production client configuration.
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills jeremylongshore/clade-local-dev-loop