core: enable remote compaction v2 by default - #27573
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rhan-oai
approved these changes
Jun 11, 2026
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Why
Remote compaction v2 is ready to become the default for providers that already support remote compaction. Leaving it behind an under-development opt-in keeps eligible sessions on the legacy remote-compaction path.
This does not broaden provider eligibility: OpenAI and Azure move to v2, while Bedrock and OSS providers retain their existing local-compaction behavior.
What changed
remote_compaction_v2stable and enable it by default.Verification
just test -p codex-core auto_compact_runs_after_resume_when_token_usage_is_over_limit auto_compact_counts_encrypted_reasoning_before_last_user auto_compact_runs_when_reasoning_header_clears_between_turns responses_lite_compact_request_uses_lite_transport_contract