v0.9.0

What's New

Sync Command

• sync flutter / sync engine / sync devtools — keep contributor environments up to date with upstream
• Bare sync runs all three sequentially with per-environment error reporting
• sy alias for shorter invocation

fcp Executable Alias

• fcp works everywhere flutter_compile does after dart pub global activate

--json Output

• sdk list --json, doctor --json, config list --json, status --json for machine-readable output

Windows Support

• Cross-platform PATH management with PowerShell profile templates
• F.homeDir() — HOME on Unix, USERPROFILE on Windows
• isCommandAvailable() uses where on Windows, which on Unix
• getHostCpuArch() uses PROCESSOR_ARCHITECTURE env var on Windows
• getShellConfigPath() returns PowerShell profile path on Windows
• doctor checks for Visual Studio (cl.exe) on Windows
• install flutter and install engine now accept Windows
• du replaced with PowerShell equivalents for status and clean

Fixes

• Added lints package to resolve analysis_options.yaml warnings
• Fixed relative import in ensure_build_test.dart