feat: add Antigravity CLI harness with Google OAuth by Desperado · Pull Request #190 · Quality-Max/qmax-code

Desperado · 2026-09-07T20:25:32Z

Summary

Add Antigravity (agy) as a fourth /orch CLI backend alongside Claude Code, Codex, and OpenCode.
Sign-in is Google OAuth via interactive agy (agy 1.1.27 has no auth subcommand). MCP is merged into ~/.gemini/config/mcp_config.json; skills go to ~/.gemini/antigravity-cli/skills/.
Surfaces: /agy, /orch Antigravity section, --backend agy, and qmax-code config set backend agy.

Test plan

Install Antigravity CLI (agy 1.1.27+) and confirm agy is on PATH or in ~/.local/bin.
Run agy interactively, complete Google OAuth, then /exit back to the shell.
In qmax-code, run /agy (or ./qmax-code --local --backend agy) and confirm MCP/skills install plus backend activation.
Send a turn that writes a file in cwd; confirm stream-json output and that a follow-up turn resumes the same conversation.
Confirm agy auth login is not invoked anywhere in the login path.
/clear starts a new conversation; switching away from Antigravity and back still works.

Made with Cursor

Wire agy as a fourth /orch backend using interactive Google sign-in, MCP merge into ~/.gemini/config, and print-mode stream-json turns. Co-authored-by: Cursor <cursoragent@cursor.com>

qualitymaxapp · 2026-09-07T20:25:37Z

QualityMax Review

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qualitymaxapp

QualityMax Review — canonical overview updated; inline findings are attached to this review.

qualitymaxapp · 2026-09-07T20:31:36Z

⚠️ QualityMax Pipeline

Gate	Result
🔍 AI diff review	✅ Clean · `gemini-3.1-flash-lite` · completed · 25 eligible / 25 reviewed · `gemini-3.1-flash-lite`
🔍 SAST	completed · 33 eligible / 33 reviewed · `qwen3.7-plus`
🔍 Canonical PR review delivery	completed · 0 eligible / 0 reviewed · exact-head review #5135095546 and overview #5575335995 confirmed
🧪 Repo Tests	✅ 767/767 passed (`go`)

_{Powered by QualityMax — AI-Powered Test Automation}

Copilot

🟡 Changes recommended

There are a few user-facing issues in the new agy integration (consent UI command labeling, repeated OAuth prompting, and inconsistent tool-name rendering) that should be corrected before approval.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Adds Antigravity CLI (agy) as a first-class orchestration backend in qmax-code, including MCP/skills installation wiring and TUI/REPL surfaces so users can run the Antigravity harness under Google OAuth without a Gemini API key.

Changes:

Introduces AgyAgent subprocess harness (agy --output-format stream-json) with conversation resume and MCP config merging into ~/.gemini/config/mcp_config.json.
Adds /agy, --backend agy, model picker entries, and config validation/support across main, REPL, and TUI.
Extends docs/security/changelog/contributing guidance to cover Antigravity OAuth, MCP path, and skills installation location.

File summaries

File	Description
SECURITY.md	Documents Antigravity MCP config path and OAuth behavior.
receipt.go	Adds `agy` receipt kind mapping.
README.md	Updates product docs and command table to include `/agy` and Antigravity backend.
main.go	Adds `agy` backend flag handling, activation flow, and backend initialization.
main_models.go	Handles model selection persistence for `agy` via `ModelOverride`.
main_models_test.go	Adds coverage for `agy` model-selection behavior.
internal/tui/tui_backend.go	Adds Antigravity section, models, and installed-state wiring to the picker UI.
internal/tui/tui_backend_cerebras_test.go	Updates picker constructor signature in existing tests.
internal/tui/tui_backend_cc_test.go	Updates picker constructor signature in existing tests.
internal/tui/tui_backend_agy_test.go	New tests asserting Antigravity picker entries and default cursor.
internal/tui/terminal.go	Adds banner line describing Antigravity backend and OAuth/no-key status.
internal/tui/input.go	Adds `/agy` to slash menu.
internal/skills/materialize.go	Adds `BackendAgy` and skills dir mapping under `~/.gemini/antigravity-cli/skills`.
internal/skills/materialize_test.go	Adds tests for `agy` skill materialization/frontmatter behavior.
internal/setup/orch.go	Adds `InstallAgy`, enables skills install/status for `agy`, and detects `agy` MCP install state.
internal/setup/orch_test.go	Adds test verifying `InstallAgy` writes/flags the MCP config.
internal/setup/consent.go	Extends consent flow to include Antigravity backend and MCP path.
internal/setup/consent_test.go	Ensures permission-mode selection applies to `agy`.
internal/setup/agy.go	Adds interactive Google OAuth prompt launcher (`agy`) during activation.
internal/repl/repl.go	Adds live backend switching to/from `agy`, picker wiring, and MCP reconnect support.
internal/repl/planwindow_turn_test.go	Includes `agy` in plan-window key tests.
internal/api/context.go	Updates session context backend comment to include `agy`/`opencode`.
internal/api/config.go	Documents `agy` backend semantics and permission-mode applicability.
internal/agent/agy_agent.go	New Antigravity subprocess harness, MCP writer, NDJSON parser, and conversation resume.
internal/agent/agy_agent_test.go	New tests for MCP merge, arg building, parsing, and error messaging.
docs/ORCHESTRATION.md	Adds Antigravity backend docs including OAuth flow and MCP install behavior.
docs/COMMANDS.md	Documents `--backend agy` and `/agy` and plan-window inclusion.
CONTRIBUTING.md	Updates contributor setup notes to mention Antigravity CLI as a dev backend option.
config_command.go	Adds config print and backend validation support for `agy`.
config_command_test.go	Adds backend validation coverage for `agy`.
CLAUDE.md	Updates repo positioning docs to include Antigravity as an orchestration backend.
CHANGELOG.md	Adds unreleased entry describing new Antigravity backend behavior.
AGENTS.md	Updates agent instructions/positioning to include Antigravity OAuth and CLI role.

Review details

Files reviewed: 33/33 changed files
Comments generated: 3
Review effort level: Lite

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+
+// PromptAgyGoogleLogin offers to launch Antigravity's Google OAuth flow.
+// agy 1.1.x has no `auth login` subcommand: Google sign-in runs when the
+// interactive CLI starts with no cached token. An AI Studio API key is not
+// required. Skipped when stdin is not a TTY, or when a file-backed OAuth
+// token is already present.
+func PromptAgyGoogleLogin(agyBin string) {
+	if agyBin == "" {
+		return
+	}
+	if agent.AgyFileTokenPresent() {
+		return
+	}
+	if !term.IsTerminal(int(os.Stdin.Fd())) {
+		fmt.Println("  Sign in with Google first: run `agy`, complete the browser login, then exit.")
+		return
+	}
+


+				if su.State == "DONE" && term != nil {
+					if a.outputVerbose && su.ToolInfo != nil {
+						out := su.ToolInfo.Output
+						if su.ToolInfo.Error != nil && su.ToolInfo.Error.Message != "" {
+							out = su.ToolInfo.Error.Message
+						}
+						term.PrintToolResult(stripMCPPrefix(su.ToolName), tui.TruncateStr(out, 200))
+					} else {
+						term.StartThinking()
+					}
+				}


+	if backend == "agy" {
+		cliName = "Antigravity"
+		globalConfigPath = "~/.gemini/config/mcp_config.json"
+	}


Skip the Google login prompt after the first offer in a process, keep ACTIVE/DONE tool labels aligned, and show `agy` in consent copy. Co-authored-by: Cursor <cursoragent@cursor.com>

feat: add Antigravity CLI harness with Google OAuth

e049f92

Wire agy as a fourth /orch backend using interactive Google sign-in, MCP merge into ~/.gemini/config, and print-mode stream-json turns. Co-authored-by: Cursor <cursoragent@cursor.com>

qualitymaxapp Bot reviewed Sep 7, 2026

View reviewed changes

qualitymaxapp Bot added the qualitymax:reviewed label Sep 7, 2026

Desperado requested a lite review from Copilot September 7, 2026 20:56

Copilot started reviewing on behalf of Desperado September 7, 2026 20:57 View session

Copilot AI reviewed Sep 7, 2026

View reviewed changes

fix: address agy review notes for OAuth, tools, and consent

37a5607

Skip the Google login prompt after the first offer in a process, keep ACTIVE/DONE tool labels aligned, and show `agy` in consent copy. Co-authored-by: Cursor <cursoragent@cursor.com>

Desperado merged commit 884d6c8 into main Sep 7, 2026
4 of 5 checks passed

Desperado deleted the Desperado/antigravity-harness-qmax branch September 7, 2026 21:46

Desperado mentioned this pull request Sep 7, 2026

release: v1.33.0 #191

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feat: add Antigravity CLI harness with Google OAuth - #190

feat: add Antigravity CLI harness with Google OAuth#190
Desperado merged 2 commits into
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Desperado commented Sep 7, 2026

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qualitymaxapp Bot commented Sep 7, 2026 •

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Desperado commented Sep 7, 2026

Summary

Test plan

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qualitymaxapp Bot commented Sep 7, 2026

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qualitymaxapp Bot commented Sep 7, 2026 •

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