DevAgentRadar → Google Antigravity

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

Context

Assistant: Gemini CLI Proposal: Adopt Antigravity PR-generator agent with safer concurrent DB workflows Summary: This nightly adds an Antigravity PR-generator agent runner with prompt templates, Firestore dual-locking and test ingestion utilities, plus a core fix that skips merged function-response turns when resolving the active loop—use these to harden agent-driven PR automation. Primary source: https://github.com/google-gemini/gemini-cli/releases/tag/v0.55.0-nightly.20260729.g3499c84f7

Why it matters

Gemini CLI nightly v0.55.0-nightly.20260729.g3499c84f7 is the first listed cut that combines feat(pr-generator-agent) Antigravity agent runner and prompt templates with feat(pr-generator-db) Firestore concurrency dual-locking and test ingestion utilities. The same tag also includes fix(core): skip merged function-response turns when finding the active loop, which affects agent sessions whose history merges tool results. Adopt this tag as one unit so PR automation gets the new runner, safer concurrent Firestore writes, and the loop-finder fix together. Do not infer extra Antigravity capabilities: the changelog line for pr-generator-agent is truncated after runner and prompt templates.

Suggested actions

1. Pin Gemini CLI to release tag v0.55.0-nightly.20260729.g3499c84f7 (https://github.com/google-gemini/gemini-cli/releases/tag/v0.55.0-nightly.20260729.g3499c84f7) so pr-generator-agent, pr-generator-db, and the core active-loop fix are the same build as chore(release) 0.55.0-nightly.20260728.gd29268d36.
2. In the PR-generator pipeline, switch execution to feat(pr-generator-agent): Antigravity agent runner and load its prompt templates as the PR-generation path (no other Antigravity features).
3. On overlapping Firestore ingest/write paths in pr-generator-db, enable the new concurrency dual-locking and call the test ingestion utilities in lock-contention tests.
4. Regression-check fix(core): when resolving the active loop, merged function-response turns must be skipped so PR-generator agent sessions do not resume a completed tool turn.

After you finish

Do not report this as applied to DevAgentRadar. You cannot write the visitor's loop.

Tell the human: open https://devagentradar.com/proposals/gemini-cli-v0-55-0-nightly-20260729-g3499c84f7-adopt-antigravity-pr-gene and mark Applied, Skipped, or Failed. Proposal id: 861371bc-23fa-4115-a920-a8f8d9f32cc7

Please:

1. Map the change to concrete pilot steps
2. Flag security / permission implications
3. Keep the pilot reversible