Clean up legacy 0.3.5 scaffolding and standalone-mode artifacts
- Removes start9/0.4/ — the StartOS 0.3.5-style YAML manifest folder,
superseded by the TypeScript-based startos/ package.
- Removes pre-StartOS standalone-mode artifacts: setup.sh, create-app.sh,
Start Summarizer.command, build-guide-pdf.py, GET-STARTED.md/.pdf.
- Removes conversion-era design docs (START9_PACKAGING_GAMEPLAN.md,
UPGRADE-DESIGN.md, KEYSAT_INTEGRATION.md). Recoverable from history if
needed.
- Tightens .gitignore: untracks node_modules, javascript/ build output,
*.s9pk, history/ user data, cookies.txt, library export, .env, .DS_Store,
and .claude/ worktree state. Files remain on disk; just removed from
the index.
Keysat
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