OpenAI directory plugin for File Search with folder setup during authorization #1485

Goal

A second plugin for OpenAI's plugin directory, for File Search only: ChatGPT searches, reads and cites the documents of folders connected over SFTP, FTPS, FTP, WebDAV (Nextcloud, ownCloud), S3 or a NAS (Synology, QNAP, FRITZ!Box, Hetzner Storage Box).

The review team rejected the earlier submissions as a relay of third-party integrations. File Search has no third-party service behind it: the index, extraction and search are AnythingMCP's own, and the protocols are not vendors.

Scope

• A fixed endpoint /mcp/file-search with single-operation tools mapped to the FILE_SEARCH built-ins. Only File Search sources; no catalog connectors, databases, File Share or public share links. /mcp/chatgpt-app stays as it is.
• During the OAuth authorization of that endpoint, an admin of a workspace without a folder is offered to connect one (protocol choice → File Search wizard in the dashboard, signed in on the granted workspace → back to the authorization). Credentials are entered in the wizard only.
• The plugin package (manifest, onboarding skill, review test cases) in deploy/openai-plugins/file-search/.

Same behaviour in Cloud and self-hosted. No schema change.