feat: Phase 4 - Validation & Status Command #105

	# .github/workflows/ci.yml
	name: CI

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	permissions:
	contents: read

	jobs:
	test:
	name: Test on ${{ matrix.os }}
	timeout-minutes: 20
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]
	rust: [stable]

	runs-on: ${{ matrix.os }}

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Install Rust toolchain
	uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt, clippy

	- name: Cache cargo registry
	uses: actions/cache@v4
	with:
	path: ~/.cargo/registry
	key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}

	- name: Cache cargo index
	uses: actions/cache@v4
	with:
	path: ~/.cargo/git
	key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}

	- name: Cache target directory
	uses: actions/cache@v4
	with:
	path: target
	key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}

	- name: Check formatting
	run: cargo fmt --all -- --check

	- name: Run clippy (lint)
	run: cargo clippy --workspace --all-features -- -D warnings

	- name: Build (debug)
	run: cargo build --workspace --all-features

	- name: Build (release)
	run: cargo build --workspace --all-features --release

	- name: Run tests
	run: cargo test --workspace --all-features

	- name: Test install script (Unix)
	if: runner.os != 'Windows'
	run: \|
	chmod +x install.sh
	./install.sh --help

	# Note: Windows install.ps1 will be added in Phase 2.7
	# For now, we verify Windows build/test but skip install script

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