codex

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felixxia-oai 7f0ab95827 Centralize compaction checkpoint selection and validation (#46009 )

## What changed

Add `codex_history::CompactionCheckpoint` to keep a checkpoint and its recorded producer model hash together, with shared checks for usability and reviewer compatibility.

Replace `ConversationHistorySnapshot::latest_compaction_model_hash()` with `latest_compaction()` and use the shared abstraction in Guardian context selection, review sessions, and parent compaction reuse. Preserve selection of the latest checkpoint even when unusable, and leave missing producer metadata unknown.

## Testing

Add coverage showing that the latest checkpoint retains its own provenance even with missing or empty encrypted content, and that compatibility requires matching producer and reviewer hashes. Adapt existing history, migration, and parent compaction tests to the new API.

GitOrigin-RevId: 98e794644edf979c98fcc8294baa48ff82ea0ed0

2026-09-16 19:25:50 +00:00

agent

Unify turn input submission and routing (#38275 )

2026-08-13 00:00:16 +00:00

connectors

Harden unsandboxed patch filesystem access (#39659 )

2026-08-20 08:10:08 +00:00

extension-api

Centralize compaction checkpoint selection and validation (#46009 )

2026-09-16 19:25:50 +00:00

git-attribution

Apply Codex attribution to app-created commits (#38419 )