Feature Request: API for claude.ai Projects file uploads (enable CLI/cron sync)

When using Claude Code on desktop, I have full access to local project files and MCP integrations (HubSpot, etc.). But when I need to access the same context from claude.ai on mobile (browser), I have to manually upload files to a Project.

Request: Expose an API (or CLI command) to programmatically upload/sync files to claude.ai Projects. This would allow users to set up a cron job or script to keep Project Knowledge in sync with local files automatically.

Use case: As a founder, I need to query my CRM (HubSpot via MCP) with full company context while on the go from my phone. The context files rarely change, but there's no way to automate the upload — it must be done manually through the web UI every time.

This would bridge the gap between Claude Code (desktop) and claude.ai (mobile).