halkyon/apps/todo/halkyon_todo_server/migrations/migration_registry.txt
Tizian 「ティツィアーン」 d08d8ad545
feat(base,learn): spaces people share, kept by halkyon_base
ADR 0044, step 2 (D1, D2, D11, D13, and D15 to D17, decided today).
halkyon_base keeps the spaces several people share, for every app:
shared_space, its members with their roles (Owner, Editor, Viewer), and
invitations by handle waiting for someone with no account on the
service yet. The sharedSpace endpoint creates a space, lists its
members, invites by handle, changes roles, removes members, hands the
space on, leaves and deletes it.

Who may do what:
- Only people with an identity reach the endpoint.
- A space the caller isn't in can't be told from one that doesn't
  exist.
- Members are named by their membership, never by their account's ID.
- Only the Owner manages the members, unless the space lets members
  invite.
- The Owner's role passes only by handing the space on, and the Owner
  leaves only naming who takes it on.
- An invitation counts as an answer about a handle, as it tells whether
  one exists.
Every rule has a test asserting the refusal.

The module stays free of the sync engine: a host hands it a SpaceGrants,
and every call runs in the module's transaction, so the engine's grants
follow the roles or nothing changes. The Owner and an Editor write; a
Viewer reads. Learn hands over SyncSpaceGrants on OfflineSyncSpaces. Todo
hands over none yet, so its server refuses until its projects are
shared.

Deleting an account hands each space the person owns to the Editor who
joined first, else the Viewer who joined first. A space with no other
member goes. This runs before the host's own deletions. A person's first
sign-in on a service makes their waiting invitations memberships, in the
same transaction that makes them a person there.

Migrations: the module's and every host's (Learn, Todo, Train, Meditate)
create the three tables, their indexes and the two cascading foreign
keys to shared_space, and nothing else. The old server keeps working.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
2026-11-11 10:54:19 +01:00

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### AUTOMATICALLY GENERATED DO NOT MODIFY
###
### This file is generated by Serverpod when creating a migration, do not modify it
### manually. If a collision is detected in this file when doing a code merge, resolve
### the conflict by removing and recreating the conflicting migration.
20261019193547604
20261019201213254-profiles
20261019204122341-deletion-notices
20261020111950710-passwords
20261020125124942-sessions-ended
20261020185752014-recovery-proof-key
20261020194229631-second-factor-waits
20261020204619863-session-code-tries
20261020211225101-email-code-purpose
20261021100422779-session-ended-warning
20261021110200318-second-factor-paths
20261021134804476-reset-hold-outs
20261023181810436-oidc-module
20261023192913500-simplelogin-keys
20261025135744931-waiting-accounts
20261025165103193-assistants
20261026140330157-assistant-budgets
20261101000019144-projects
20261101000604776-tasks
20261101180755366-settings
20261106183802735-filters
20261106184947570-comments
20261110225635732-file-store
20261110231607673-attachments
20261111091721303-shared-spaces