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Proposals/Upgrade Gemini CLI nightly and gate subagents be
proposalteamP2Worth a lookGCGemini CLI

Upgrade Gemini CLI nightly and gate subagents behind agents mode

Move to Gemini CLI v0.56.0-nightly.20260819.g571851b10 so subagents cannot run when agents mode is off, sub-agent handoff tokens work on startup, and editor/autocomplete terminal UX is fixed.

Why this loop

This nightly hardens subagent control and reliability: subagents are blocked when agents mode is disabled, and a startup handoff-token regression is fixed. It also restores terminal correctness after external editors, improves autocomplete by appending a trailing space, and surfaces a Vertex AI locations docs link. Teams using Gemini CLI with subagents should upgrade, then deliberately set agents mode according to policy so disabled mode truly means no subagent execution.

Proposed actions

  1. Upgrade Gemini CLI to v0.56.0-nightly.20260819.g571851b10 (release https://github.com/google-gemini/gemini-cli/releases/tag/v0.56.0-nightly.20260819.g571851b10) and restart every long-lived CLI session
  2. Set agents mode to disabled in Gemini CLI, then start the CLI and confirm no subagent launches or accepts handoffs on startup
  3. Re-enable agents mode only where subagents are approved; start a fresh session and confirm sub-agent handoff tokens initialize without the prior startup regression
  4. From Gemini CLI, open a file in your external editor, save/exit, and confirm the terminal buffer rerenders without a manual redraw
  5. Trigger autocomplete in the prompt and confirm suggestions insert with a trailing space so you can keep typing the next token immediately
  6. Open the in-CLI Vertex AI locations documentation link and record the regions your project is allowed to use

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Google Antigravity / agent task

# DevAgentRadar → Google Antigravity

Goal: turn this release signal into a safe pilot plan for my stack.

## Context
Assistant: Gemini CLI
Proposal: Upgrade Gemini CLI nightly and gate subagents behind agents mode
Summary: Move to Gemini CLI v0.56.0-nightly.20260819.g571851b10 so subagents cannot run when agents mode is off, sub-agent handoff tokens work on startup, and editor/autocomplete terminal UX is fixed.
Primary source: https://github.com/google-gemini/gemini-cli/releases/tag/v0.56.0-nightly.20260819.g571851b10

## Why it matters
This nightly hardens subagent control and reliability: subagents are blocked when agents mode is disabled, and a startup handoff-token regression is fixed. It also restores terminal correctness after external editors, improves autocomplete by appending a trailing space, and surfaces a Vertex AI locations docs link. Teams using Gemini CLI with subagents should upgrade, then deliberately set agents mode according to policy so disabled mode truly means no subagent execution.

## Suggested actions
1. Upgrade Gemini CLI to v0.56.0-nightly.20260819.g571851b10 (release https://github.com/google-gemini/gemini-cli/releases/tag/v0.56.0-nightly.20260819.g571851b10) and restart every long-lived CLI session
2. Set agents mode to disabled in Gemini CLI, then start the CLI and confirm no subagent launches or accepts handoffs on startup
3. Re-enable agents mode only where subagents are approved; start a fresh session and confirm sub-agent handoff tokens initialize without the prior startup regression
4. From Gemini CLI, open a file in your external editor, save/exit, and confirm the terminal buffer rerenders without a manual redraw
5. Trigger autocomplete in the prompt and confirm suggestions insert with a trailing space so you can keep typing the next token immediately
6. Open the in-CLI Vertex AI locations documentation link and record the regions your project is allowed to use

## Config surfaces this release may change
- subagent definitions — check your repo before applying


Please:
1. Map the change to concrete pilot steps
2. Flag security / permission implications
3. Keep the pilot reversible
agentmodelcliprereleaseRelease source ↗

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Originating release signal

GCGemini CLIv0.56.0-nightly.20260819.g571851b10Aug 19, 2026

v0.56.0-nightly.20260819.g571851b10 Release v0.56.0-nightly.20260819.g571851b10

[SSR Agent] Issue Fix (28050): Add Vertex AI locations documentation link · [SSR Agent] Issue Fix (22093): Prevent subagents from running when agents mode is disabled · [SSR Agent] Issue Fix (23954): Add trailing space to autocomplete suggestions · [SSR Agent] Issue Fix (24935): Force terminal buffer rerender after exiting external editors · [SSR Agent] Issue Fix (28518): Fix sub-agent handoff token regression on startup

Verified excerpt — the source's own words
## What's Changed
* [SSR Agent] Issue Fix (28050): Add Vertex AI locations documentation link by @joneba-google in https://github.com/google-gemini/gemini-cli/pull/28865
* [SSR Agent] Issue Fix (22093): Prevent subagents from running when agents mode is disabled by @joneba-google in https://github.com/google-gemini/gemini-cli/pull/28867
* [SSR Agent] Issue Fix (23954): Add trailing space to autocomplete suggestions by @joneba-google in https://github.com/google-gemini/gemini-cli/pull/28868
* [SSR Agent] Issue Fix (24935): Force terminal buffer rerender after exiting external editors by @joneba-google in https://github.com/google-gemini/gemini-cli/pull/28880
* [SSR Agent] Issue Fix (28518): Fix sub-agent handoff token regression on startup by @joneba-google in https://github.com/google-gemini/gemini-cli/pull/28882


**Full Changelog**: https://github.com/google-gemini/gemini-cli/compare/v0.56.0-nightly.20260818.g194edea47...v0.56.0-nightly.20260819.g571851b10
Primary source ↗