Upgrade Codex CLI to rust-v0.161.0 and opt in Daybreak with --enable cli_daybreak
Codex CLI rust-v0.161.0 makes GPT-6.1 Sol the default bundled and Bedrock model, adds TUI/mcp login <name>, and turns Daybreak/Cyber routing off unless you set features.cli_daybreak=true or --enable cli_daybreak.Why this loop
rust-v0.161.0 switches the default catalog model to GPT-6.1 Sol in both the bundled catalog and Amazon Bedrock, so staying on an older CLI or a pinned catalog misses the new default. MCP auth can now happen in-session with /mcp login <name> instead of leaving the TUI. Daybreak is strictly opt-in: --enable cli_daybreak or features.cli_daybreak=true. daybreak=true alone is not enough—controls stay hidden, /daybreak is unavailable, and automatic Cyber routing is omitted even for saved Daybreak threads. Teams that assumed routing from a saved preference will lose it after upgrade unless they set the new flag. Per-turn Cyber still works via codex exec --cyber-access-program or the TypeScript SDK cyberAccessProgram option without changing the saved Daybreak choice. Bedrock also gains multi-agent V2 and Ultra reasoning on compatible models, and Bedrock Mantle accepts AWS GovCloud regions.
Proposed actions
- Upgrade OpenAI Codex CLI to rust-v0.161.0 from https://github.com/openai/codex/releases/tag/rust-v0.161.0 so GPT-6.1 Sol is the default model in the bundled and Amazon Bedrock catalogs.
- In an active Codex TUI session, authenticate each MCP server with: /mcp login <name>
- If you need Daybreak UI or automatic Cyber routing, launch with --enable cli_daybreak or set features.cli_daybreak=true. Do not rely on daybreak=true alone; without the opt-in, /daybreak stays unavailable and Cyber routing is omitted even for saved Daybreak threads.
- For a one-off Cyber program without changing saved Daybreak prefs, run: codex exec --cyber-access-program <program> (TypeScript SDK: cyberAccessProgram). This override still works when cli_daybreak is disabled.
- On Amazon Bedrock, use multi-agent V2 and Ultra reasoning on compatible models, and configure Bedrock Mantle with AWS GovCloud regions if you run in GovCloud.
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Context
Assistant: OpenAI Codex CLI
Proposal: Upgrade Codex CLI to rust-v0.161.0 and opt in Daybreak with --enable cli_daybreak
Summary: Codex CLI rust-v0.161.0 makes GPT-6.1 Sol the default bundled and Bedrock model, adds TUI /mcp login <name>, and turns Daybreak/Cyber routing off unless you set features.cli_daybreak=true or --enable cli_daybreak.
Primary source: https://github.com/openai/codex/releases/tag/rust-v0.161.0
Why it matters
rust-v0.161.0 switches the default catalog model to GPT-6.1 Sol in both the bundled catalog and Amazon Bedrock, so staying on an older CLI or a pinned catalog misses the new default. MCP auth can now happen in-session with /mcp login <name> instead of leaving the TUI. Daybreak is strictly opt-in: --enable cli_daybreak or features.cli_daybreak=true. daybreak=true alone is not enough—controls stay hidden, /daybreak is unavailable, and automatic Cyber routing is omitted even for saved Daybreak threads. Teams that assumed routing from a saved preference will lose it after upgrade unless they set the new flag. Per-turn Cyber still works via codex exec --cyber-access-program or the TypeScript SDK cyberAccessProgram option without changing the saved Daybreak choice. Bedrock also gains multi-agent V2 and Ultra reasoning on compatible models, and Bedrock Mantle accepts AWS GovCloud regions.
Suggested actions
- Upgrade OpenAI Codex CLI to rust-v0.161.0 from https://github.com/openai/codex/releases/tag/rust-v0.161.0 so GPT-6.1 Sol is the default model in the bundled and Amazon Bedrock catalogs.
- In an active Codex TUI session, authenticate each MCP server with: /mcp login <name>
- If you need Daybreak UI or automatic Cyber routing, launch with --enable cli_daybreak or set features.cli_daybreak=true. Do not rely on daybreak=true alone; without the opt-in, /daybreak stays unavailable and Cyber routing is omitted even for saved Daybreak threads.
- For a one-off Cyber program without changing saved Daybreak prefs, run: codex exec --cyber-access-program <program> (TypeScript SDK: cyberAccessProgram). This override still works when cli_daybreak is disabled.
- On Amazon Bedrock, use multi-agent V2 and Ultra reasoning on compatible models, and configure Bedrock Mantle with AWS GovCloud regions if you run in GovCloud.
Config surfaces this release may change
- agent context files (high confidence) — check your repo before applying
- MCP servers — check your repo before applying
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Deliverables:
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