Codex CLI 0.146.0-alpha.7

• [new] Agent plugin manifest support, including integration with the agent-plugins marketplace endpoint.
• [new] MCP session prewarm and refresh so servers can be prepared and updated more smoothly within a session.
• [new] Rollout support as a first-class subsystem for conversation summary / history paths.
• [new] Thread-store improvements for paginated fork and turn lookup in local history.
• [new] TUI turn runtime handling for chat turns.
• [changed] Sandbox and network-related environment knobs: CODEX_SANDBOX_NETWORK_DISABLED, CODEX_NETWORK_PR (replacing CODEX_NETWORK_PR_PROFILE), CODEX_SNAPSHOT_PROXY_OVERRIDE (replacing the prior override name), and CODEX_ESCALATE_SOCKET.
• [changed] Collaboration and exec lifecycle signals, including collab_waiting_end and exec_command_begin.
• [changed] Thread, tool, and input models refined (plugin source shapes, sandbox policy deserialization, web-search actions, mentions, and related thread-item payloads).
• [removed] Obsolete typed payloads and events superseded by the above model updates (including the prior delete_to_line_end notification).

Under the hood

• New core-plugins manifest parsing for agent plugins, aligned with marketplace plugin source objects (including git subdirectory packaging).
• Session-layer MCP prewarm/refresh modules to reduce startup friction and keep server state current.
• Local thread-store work for paginated forks and efficient turn history lookup; TUI chat widget gains a dedicated turn runtime path.
• Data-model and enum cleanups across history cursors, thread metadata, skill migration, login/account params, and tool-call summaries—mostly renames and shape fixes rather than user-visible behavior changes.
• Dependency/lockfile refresh for the alpha.7 version bump.