From 16 KB a picture's or binary file's entry names its bytes by their
SHA-256 instead of holding them; the bytes are on F, content-addressed
(GET/POST /blobs with the session's grant, from the editor's origin, at
most 16 MiB). A document's blob side says where they are: the editor's
fetches and uploads, the room thread's asks F's main thread, and a start
waits for the ones asked for; without a side everything stays in the
document. Text stays Y.Text. A blob whose bytes are not there is never
written back empty. A blob F has not got yet is asked for again a few
times, and a running room reads late bytes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
One room per project for everyone in it, held by a few worker_threads,
each room with a replica of the document that Hocuspocus' direct
connection keeps open: changes go in, what the room writes comes back.
/sim?project=... signs in as /sync does and says refusals and partings
as the socket's closing; only a write grant changes the room. The state
names who started the simulation. After the last person the room stays
60 s, then stops, writes back and ends. Freezing stops a running
simulation and refuses to start one, deleting ends the room without
writing back, revoking lets the person go from the room too; a failed
thread ends its rooms, stopping the service stops them all.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Server F checks the dashboard's entry ticket as itsdangerous does
(tools/ticket-oracle: tickets made by itsdangerous 2.2.0 itself), redeems
it at /__auth for a session cookie (only the key's SHA-256 is kept) and
decides at /sync by the session's grant: none, read or write; a frozen
project is read by everyone; every refusal names its reason (one list in
packages/protocol/src/sync.ts). A WebSocket from a page of another origin
is refused. /svc/* with the service key makes, deletes, freezes and
thaws projects, ends a person's grant or all their sessions (connections
let go) and lists the sessions. Snapshots, restoring and copying move to
F6 (they need the canonical doc.json and an epoch).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
julian.kiedaischandClaude Opus 5.5