Update README.md #16

	# ci.yml
	# =======
	# Continuous Integration workflow.
	#
	# What is CI (Continuous Integration) ?
	# CI means that every time someone pushes code or opens a pull request,
	# GitHub automatically runs the tests. This catches bugs before they
	# reach the main branch.
	#
	# GitHub Actions reads this file and executes the steps defined below
	# on a fresh virtual machine hosted by GitHub (free for public repos).

	name: CI

	# When to run this workflow
	on:
	push:
	branches: [main] # On every push to the main branch
	pull_request:
	branches: [main] # On every pull request targeting main

	jobs:
	test:
	name: Run Tests
	runs-on: ubuntu-latest # Use a fresh Ubuntu virtual machine

	steps:
	# Step 1 : Download the repository code onto the virtual machine
	- name: Checkout code
	uses: actions/checkout@v4

	# Step 2 : Install Python on the virtual machine
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"

	# Step 3 : Install project dependencies
	- name: Install dependencies
	run: \|
	pip install --upgrade pip
	pip install anthropic pytest

	# Step 4 : Run the test suite
	# The ANTHROPIC_API_KEY is read from GitHub repository secrets.
	# Tests use mocking, so no real API call is made - the key is a placeholder here.
	- name: Run tests
	run: python -m pytest src/test/ -v
	env:
	ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}

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