Apply PR #15487: core: make account login upgrades safe while adding multi-account workspace auth

Author: opencode-agent[bot]

AGENTS.md

@@ -111,3 +111,7 @@ const table = sqliteTable("session", {
 - Avoid mocks as much as possible
 - Test actual implementation, do not duplicate logic into tests
 - Tests cannot run from repo root (guard: `do-not-run-tests-from-root`); run from package dirs like `packages/opencode`.
+
+## Type Checking
+
+- Always run `bun typecheck` from package directories (e.g., `packages/opencode`), never `tsc` directly.

packages/opencode/migration/20260228203230_blue_harpoon/migration.sql

@@ -0,0 +1,11 @@
+CREATE TABLE `account` (
+	`id` text PRIMARY KEY,
+	`email` text NOT NULL,
+	`url` text NOT NULL,
+	`access_token` text NOT NULL,
+	`refresh_token` text NOT NULL,
+	`token_expiry` integer,
+	`workspace_id` text,
+	`time_created` integer NOT NULL,
+	`time_updated` integer NOT NULL
+);