Codex 0.165.0 adds a Google Cloud Vertex AI provider and GPT-6.1 Terra, and turns on memory v2 for fresh profiles

Codex CLI 0.165.0, released October 27, 2026, per its release notes:

• Vertex AI: a built-in Google Cloud Vertex AI provider, configured with model_provider = "gcp".
• Models: GPT-6.1 Terra is added to the model catalogs.
• Reasoning effort: changing reasoning effort during a conversation is enabled by default for supported models.
• Memory: memory v2 is on by default for fresh profiles, and memories from other agents can be imported into it.
• Sessions: the session picker gains a repository filter, and the agent command center groups sessions by directory, which helps across linked worktrees. Experimental attached thread forks are added to the app-server API.

Fixes include fresh TUI sessions honoring the server's default approval reviewer, queued agent messages no longer restarting work after an interrupt or a switch to Plan mode, and no more retries when a provider reports a model was not found. The release also closes a marketplace URL validation gap that could let Git connect to a different host than the one checked against allowed patterns.