[adampeterhiggins]

Conductor workspaces hold useful history: a worktree on its own branch with several agent tabs. Until now there was no way to move one into T3 Code, and the existing Claude Code / Codex import can't see these sessions because they ran in Conductor's worktree rather than in the project folder.

What changed

Import Conductor workspaces. The Import conversation picker lists conversations and Conductor workspaces from all projects in one list, newest first, with search and a Filters menu (Project: All projects or one; Source: All / Claude Code / Codex / Conductor, defaulting to Conductor). The menu reuses the pull request picker's radio submenu. Rows name their project and import into it. The command palette entry is a plain Import conversation…. Workspaces are titled the way Conductor's sidebar titles them: the custom name, else the PR title, else the branch in words. It lists the project's active workspaces: same repository (by root or origin remote), worktree still on disk, at least one sent prompt. Importing one:

• Creates a thread for each open tab, grouped as chat tabs. A new ThreadTabs.adopt writes the group membership before the threads exist, so clients never see the tabs as separate rows.
• Points every tab at the workspace's branch and worktree, and carries over the workspace's pin.
• Takes history from Conductor's conductor.db, opened read-only. Conductor stores Claude, Codex and Cursor output in one Claude-SDK shape, so a single parser keeps prompts and top-level reply text.
• Copies images and files sent with a prompt (from the workspace's .context/attachments) into T3's attachment store and attaches them to the message. Conductor has already deleted many of these files, even in active workspaces; a missing one is named in the message ("Attachment not available: …") rather than silently dropped.
• Shows diff comments sent to the agent (Conductor's review attachments) inside their prompt as quoted review comments. Without this they import as empty messages.
• Binds Claude and Codex tabs to their native session so they resume. Cursor tabs have no session T3 can reach, so their history goes through the existing v1_import handoff.
• Uses deterministic thread ids (conductor:<session>), so the picker shows Open for a workspace that was already imported.

New RPCs are conductor.listWorkspaces and conductor.importWorkspace; the service is apps/server/src/conductor/ConductorImporter.ts.

Fix: imported Claude sessions now resume on their first turn. An imported thread has no provider turns yet, so ClaudeAdapterV2 opened it with sessionId: <existing id>. The CLI rejects that with "Session ID … is already in use" (reproduced with claude -p --session-id). Imported provider threads now record nativeMetadata.importedNativeId, and ProviderTurnStartService treats a matching native thread as having turns, so the adapter uses resume. This also fixes the existing Claude Code import.

Workspace state that stays where it is: notes (.context/notes.md, todos.md) are files in the worktree the threads now run in. Almost all of Conductor's diff comments (about 1,120 of 1,130 in active workspaces) are mirrored GitHub PR review comments, which T3 reads from the PR it finds for the branch. Conductor stores terminal scrollback encrypted (iv + ciphertext), so terminal history can't be imported. Unsent local diff comments have no server-side home in T3 (review drafts live in the client's composer) and aren't imported. Archived workspaces and mobile (no import picker) are out of scope. Conductor's setup and run scripts aren't copied either; the fork already applies a repo's Conductor settings to T3 worktrees. Docs are updated in docs/fork-differences.md and docs/user/thread-sidebar.md.

Testing

• ConductorImporter.test.ts builds a temporary Conductor database and checks transcript parsing (attachment mentions, inlined review comments), the workspace listing (hidden, empty and archived tabs or workspaces are filtered out), the tab-group import, the Claude native binding, the Cursor handoff, copying an image into the attachment store, naming a deleted file, and that re-importing writes nothing.
• ProviderTurnStartService.test.ts checks that an imported native session's first turn is passed as nativeThreadHasTurns: true, with an unmarked control case.
• The affected server tests (117) pass, and server and web typecheck clean.
• The parser was run read-only against a real Conductor database: 2,391 rows became 91 messages in about 50 ms.
• Not yet checked in a running client, so there are no before/after screenshots of the picker.

Done by Claude Opus 5.5 (1M context) in Claude Code, running inside T3 Code.

🤖 Generated with Claude Code