Hi Product Hunt, Sharing a personally useful app I built because three things kept driving me crazy with Claude and Codex on my Mac. First: I'd share a folder with Claude in a Cowork session, upload a bunch of files, get great context going — and then the chat would hit the length limit. Start a new chat. All the files I'd uploaded, gone. Re-upload everything. Re-explain the project. Same setup, every time. Second: sharing my live inbox with Claude felt insane. Once you grant access to mail, the AI sees everything 2FA codes, personal stuff, drafts, the dentist confirmation, all of it. There was no way to say "just see these threads, leave the rest." Third: switching between Claude and Codex meant doing the whole setup twice. Same project, same files, same emails and while for code it's not that painful for anything with files and emails is very annoying. Manifold was my answer. Native macOS app that sits between your AI tools and your files/email. You pick what each AI can see file by file, message by message, or with rules across whole folders and mailboxes. Version history of everything you've shared lives on your Mac. Same context works across Claude, Codex, or any new chat. Audit log so you can actually see what the AI read. Optional on-device PII redaction via OpenAI's Privacy Filter (Apache 2.0, runs locally) for the sensitive stuff. What's rough: it's v0.x. The MCP integration with Claude Desktop, Cowork, Claude Code, and Codex CLI is solid. Plan to add Gemini end of May. The first-run experience needs polish. Some flows have rougher edges than I'd like but love users to help guide the best way to go. Open source under Apache 2.0. Code: github.com/Spatial-Duality/Manifold hopefully this can be refined and made even better. — Amar

Manifold

Pick what emails and files Claude and Codex see.

Pick what emails and files Claude and Codex see.