v0.43.0

Agent Threads v0.43.0

Features and improvements

• Optional Design plugin: Design now releases independently as Design for Agent Threads, keeping the host focused on agent execution and peer integrations. (#579)
• Peer plugins can prepare new threads transactionally: incomplete preparation rolls back the provisional thread and its allocated artifact storage; sending remains blocked until commit.
• Existing legacy design cards retain a read-only Reveal source action when Design is absent. Installing Design restores its artifact controls without moving existing files.

Migration — Design users

• /design, EnterDesignMode, design creation, preview, and capture are no longer built into Agent Threads. Install and enable Design for Agent Threads v0.1.0 alongside this release to keep using them.
• Design is currently distributed from a private repository. Repository access is required to download it. If you need Design and do not have access, stay on v0.42.0 until you can obtain the companion plugin.
• Enable Agent Threads first, then Design. Start a new conversation after enabling the plugins to refresh contributed agent tools.
• Interactive previews and screenshot capture require Geode's artifact runtime. In Obsidian, Design reveals the generated source instead.
• This release does not include the Geode conversation-first pane fix; Geode updates independently.

Verification

• 3,230 unit/integration tests passed, 1 existing skip; TypeScript and production build passed.
• 217 browser/screenshot tests passed, 2 existing harness skips. These are browser-harness checks, not a fresh installed-host smoke test.
• Release metadata and migration guidance synchronized in #584.