Files
Garrett Delfosse 2b9fad8bba feat: add chat project sharing database layer (#30479)
Database and authorization layer for chat project sharing (experiment
`chat-projects`), part 1 of 2. #30439 adds the API on top of it. Nothing
here changes behavior: projects start with empty ACLs, no endpoint
writes them yet, and deleting a project still detaches its chats.
Project deletion is in #30683.

- **Schema:** migration `000621` adds `user_acl` and `group_acl` jsonb
columns to `chat_projects`, typed as `ChatACL` like chats, with GIN
indexes. It also adds the `chat_project:share` API key scope.
- **Queries:**
- `GetChatProjectsOwnedOrSharedWithUserID`: owned projects plus projects
with an ACL entry for the user directly, through a group, or through the
Everyone group (whose ID is the organization ID). Entries count only for
members of the project's organization. Keys match regardless of actions,
so dbauthz filters the rows.
- `IsChatProjectAccessibleByUserID`: whether a user owns a project or
holds a `read` or `*` grant on it, for code running under a system
subject. With sharing disabled, dbauthz answers owner-only.
- `GetChatProjectByIDForUpdate`: lets the ACL update read, modify, and
write in one transaction.
  - `UpdateChatProjectACLByID`.
- **RBAC:**
- New `share` action on `chat_project`. dbauthz requires it to update
the ACL.
- `ChatProject.RBACObject` attaches the project ACL. Memory objects get
a derived ACL: project `read` grants memory read, and `read` with
`update` grants memory create and delete. Wildcard grants count. Read
sharees change memories through their chats' agents, which #30439 gates.
Project instructions authorize through the same object, so a `read`
grant reads them and an `update` grant edits them.
- `--disable-chat-sharing` also covers projects: ACLs are ignored, the
ACL update is rejected, and roles deny `chat_project:share`. The help
text and chat sharing docs say so.
- **Audit:** `user_acl` and `group_acl` changes are tracked.
- **Tests:**
- Querier tests run the access queries both raw and through dbauthz
(owner, direct user, group, Everyone, wildcard grants, a member of
another org, grants without read).
- RBAC object and memory ACL tests, with an authorizer check, in both
sharing modes.
- dbauthz cases including the disabled guards, and the
`chat_project:share` negation in the roles test.

The generated TypeScript changes only add the new scope value.

> Generated by Coder Agents.
2026-10-14 10:42:00 -04:00
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