Initial Context Extractor: extension + Playwright/Camoufox package

Ship a shared markdown/prompt core used by a Brave/Chrome MV3 extension and a Python automation API, with pytest coverage, CI, and packaging smoke.

Makefile

@@ -0,0 +1,27 @@
+.PHONY: help test lint package ci install
+
+help: ## Show targets
+	@grep -E '^[a-zA-Z_-]+:.*?## ' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "  %-12s %s\n", $$1, $$2}'
+
+install: ## Create venv and install automation package + Playwright Chromium
+	cd automation && python3 -m venv .venv
+	cd automation && .venv/bin/pip install -U pip && .venv/bin/pip install -e ".[dev]"
+	cd automation && .venv/bin/playwright install chromium
+
+test: ## Run pytest
+	cd automation && .venv/bin/pytest -q
+
+lint: ## Syntax-check extension JS + validate manifest JSON
+	@node --check extension/core/dom.js
+	@node --check extension/core/prompt.js
+	@node --check extension/page-patcher.js
+	@node --check extension/content.js
+	@node --check extension/background.js
+	@node --check extension/popup.js
+	@python3 -m json.tool extension/manifest.json >/dev/null
+	@echo "lint OK"
+
+package: ## Zip extension/ into dist/
+	python3 scripts/package_extension.py
+
+ci: lint test package ## Local stand-in for GitHub Actions