v0.12.2

Fixed

• Imported Codex sessions record the target's effective model provider instead
  of leaving it empty and locking the resumed session. CI and release checks
  install Codex for native configuration discovery.

• Persistent native streams capture stderr synchronously with child writes,
  so completion reports do not race earlier effort telemetry on another pipe.

• Cross-agent Claude/Codex/Pi imports replay readable thinking as tagged text
  without sending foreign signatures through the target's encrypted channel.
  Opaque-only thinking is omitted and the remaining message chain is repaired;
  same-agent signature round-trips stay intact.

Added

• make smoke-transcript-cross-live: extends the six conversion directions
  with real continuation and exact retrieval of source-generated unique tokens.
  Also included in make smoke-live; quota or credential failures fail the check.

Validation

• Linux, macOS, and Windows CI passed; CodeQL and release verification passed.
• All six Claude/Codex/Pi conversion directions passed real continuation and exact retrieval of source-generated unique tokens. Retrieval prompts did not contain the complete token and tools were prohibited.
• The four previously quota-blocked Claude directions were subsequently verified with --model sonnet; all Claude calls reported claude-sonnet-5-5. The two Codex/Pi directions were rechecked in the same successful run.

Full changelog