Draft: two-way teleport with native CLI sessions

[baanish]

Draft. Do not merge. Stacked on the Claude teleport draft. Native CLI import/export for Codex and Claude only.

What Changed

T3 can list, import, and export text turns between a thread and native Codex or Claude CLI session files. Native files stay native. Import copies a CLI session onto a T3 thread via thread.history.replace. Export writes the thread back. Presence (t3 vs native) swaps Import/Export so both sides are not writers at once.

Grok and OpenCode remain in-app providers. Their native CLI teleport formats are not in this PR.

Review follow-ups on this tip:

• OpenCode interruptTurn still marks the session ready immediately so Stop can leave Working, but sendTurn waits until session.abort finishes.
• thread.history-replaced prunes only attachment files previously referenced by that thread, so sanitized thread-id collisions cannot delete another thread's files.
• Command palette import lists physical projects, not collapsed picker targets.
• Extra Codex/Claude instances with an explicit empty homePath use the provider default home instead of inheriting the default instance.
• Import and listing treat a project's thread worktrees (and project subdirectories) as in-project, so Teleport Out from a worktree thread can Teleport In again. Ancestor cwds such as / are rejected.
• Export wraps pending native presence in acquireUseRelease. Interruptions and post-write failures revert to T3, or persist the real native path if the file was written, instead of leaving teleport-pending:....
• Teleport lock/schema/identity/file-locked/unsupported-provider/native-write errors derive message from their fields; lockProbeError is gone. Native writes record a stage instead of a free-form message, and schema-version verify failures remap with catchTags.
• A failed new-thread import deletes the created thread instead of leaving an unbound orphan.
• In-place import binds teleport ownership before replacing history, so a failed replace cannot leave overwritten messages on an unbound thread.
• On Windows, replacing a native session moves the existing file aside first so a failed rename can restore it.

Why

Codex and Claude are the native CLIs people actually use, and both write a single jsonl/session file with an atomic writer. Grok and OpenCode teleport were dropped because those CLIs are far less used and the implementations are jankier (Grok's 3-file directory swap, OpenCode's sqlite/JSON dual store and parent-cwd heuristics).

The Grok and OpenCode format work is parked on cursor/teleport-grok-opencode-archive-4ce4 so it can be restored later without reconstructing the adapters.

Stack

1. Teleport backend
2. Teleport UI
3. Codex support
4. Claude support
5. This PR — keep Codex and Claude; drop Grok and OpenCode native formats from the tip

UI Changes

Import lives on the new-thread / sessions view. Export lives in the chat header. Composer send is disabled while the thread is in the native CLI. Teleport Out uses cursor-not-allowed while busy. Mobile send is disabled on teleported-out threads (no teleport UI).

New UI

Hover

Composer disabled after Teleport Out

Recordings

Codex

Claude

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

  

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[github-actions]

Thread transfer impact

⚠️ The latest CI run did not produce a thread transfer result for f45f89e.

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