fix(clients): point Antigravity at ~/.gemini/config/ after the 2.x migration by Scriptwonder · Pull Request #1151 · CoplayDev/unity-mcp

Scriptwonder · 2026-05-24T02:57:33Z

Community report: "in .gemini there are two folders, antigravity and config; antigravity is not where mcp.json is supposed to be — there is another config folder where mcp.json should be placed."

Verified on a real machine. Antigravity 2.x migrates its MCP config out of the runtime-state folder and into a dedicated one:

~/.gemini/
├── config/                    ← new home (Antigravity reads from here)
│   ├── .migrated              ← migration marker dropped by Antigravity 2.x
│   ├── config.json
│   └── mcp_config.json        ← "mcpServers": {}  (empty after migration)
├── antigravity/               ← still used for runtime state only
│   ├── conversations/
│   ├── scratch/
│   ├── brain/
│   └── mcp_config.json        ← THE PATH WE'VE BEEN WRITING TO. Antigravity no longer reads this.
└── antigravity-backup/        ← pre-migration backup Antigravity made
    └── mcp_config.json

The path mismatch combined with the recent startup auto-rewrite means we were silently overwriting a file Antigravity ignores on every Editor launch, so the user sees their carefully-configured UnityMCP entry never showing up in Antigravity's MCP servers UI.

Two changes:

Point all three platform paths at ~/.gemini/config/mcp_config.json (Antigravity 2.x is consistent across macOS / Windows / Linux on this layout).
Override IsInstalled so a fresh install — Antigravity installed but never launched — is still detected. The inherited ParentDirectoryExists(GetConfigPath()) would false-negative because ~/.gemini/config/ is only created on first launch of Antigravity. Check ~/.antigravity/ (installer-created, VS-Code-style support dir), either of the gemini config dirs, or the macOS app bundle. Without this, ConfigureAllDetectedClients skips Antigravity entirely on a brand-new machine.

Summary by CodeRabbit

New Features
- Added support for the Antigravity IDE client.
- Renamed user-facing client to "Antigravity 2.0" and updated related onboarding steps.
Bug Fixes
- Improved installation detection for Antigravity to reduce false negatives across platforms.
- Unified MCP configuration handling so Antigravity 2.0 uses the migrated config location.
Documentation
- Clarified quick-start and manual configuration guidance for Cursor, Antigravity 2.0, Antigravity IDE, OpenClaw, and Claude Desktop.

… migration) Antigravity 2.x moved its MCP config from ~/.gemini/antigravity/mcp_config.json to a dedicated ~/.gemini/config/mcp_config.json. The migration drops a `.migrated` marker in the new location and renames the prior folder to `antigravity-backup`; the old path keeps Antigravity's runtime state (conversations/, scratch/, brain/, etc.) but is no longer read for MCP. Confirmed empirically on a real machine: ~/.gemini/config/mcp_config.json shows `mcpServers: {}` (Antigravity reads from here) while our writes have been landing in the legacy ~/.gemini/antigravity/mcp_config.json that Antigravity now ignores. Community report matches this exactly: "in .gemini there are two folders, antigravity and config; antigravity is not where mcp.json is supposed to be, there is another config folder." Also override IsInstalled. The inherited ParentDirectoryExists check points at ~/.gemini/config/, which is only created on Antigravity's first launch — on a fresh machine that has the app installed but never opened, detection false-negatives and ConfigureAllDetectedClients skips Antigravity entirely. Check ~/.antigravity/ (installer-created), the new config dir, the legacy config dir, or /Applications/Antigravity.app on macOS; any one of those is conclusive.

coderabbitai · 2026-05-24T02:57:45Z

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 66df1503-8575-4bb3-828d-9dfb383f78b5

📥 Commits

Reviewing files that changed from the base of the PR and between 3ea327e and 4036c3d.

📒 Files selected for processing (6)

MCPForUnity/Editor/Clients/Configurators/AntigravityConfigurator.cs
MCPForUnity/Editor/Clients/Configurators/AntigravityIdeConfigurator.cs
MCPForUnity/Editor/Clients/Configurators/AntigravityIdeConfigurator.cs.meta
README.md
docs/guides/MCP_CLIENT_CONFIGURATORS.md
docs/i18n/README-zh.md

✅ Files skipped from review due to trivial changes (3)

MCPForUnity/Editor/Clients/Configurators/AntigravityIdeConfigurator.cs.meta
docs/i18n/README-zh.md
docs/guides/MCP_CLIENT_CONFIGURATORS.md

📝 Walkthrough

Walkthrough

Unify Antigravity MCP config to ~/.gemini/config/mcp_config.json and rename the client to “Antigravity 2.0”; expand installation detection. Add a separate Antigravity IDE JsonFileMcpConfigurator (with .meta). Update README and docs to document both Antigravity variants and per-client notes.

Changes

Antigravity Configuration Migration

Layer / File(s)	Summary
Config path migration & installation detection `MCPForUnity/Editor/Clients/Configurators/AntigravityConfigurator.cs`	Points AntigravityConfigurator at `~/.gemini/config/mcp_config.json`, renames client to `Antigravity 2.0`, adds `System.Runtime.InteropServices` import, expands `IsInstalled` to check multiple markers and `/Applications/Antigravity.app` on macOS, and updates initial install step text.
Antigravity IDE configurator and .meta `MCPForUnity/Editor/Clients/Configurators/AntigravityIdeConfigurator.cs`, `MCPForUnity/Editor/Clients/Configurators/AntigravityIdeConfigurator.cs.meta`	Adds `AntigravityIdeConfigurator` that reads `~/.gemini/antigravity-ide/mcp_config.json`, maps `serverUrl`, sets Unity defaults (`disabled = false`), strips env vars when appropriate, implements `IsInstalled`, and includes Unity `.meta` metadata.
Docs and README updates `README.md`, `docs/guides/MCP_CLIENT_CONFIGURATORS.md`, `docs/i18n/README-zh.md`	Refines Quick Start and Manual Configuration client guidance to mention Cursor, Antigravity 2.0, Antigravity IDE, OpenClaw, and Claude Desktop behavior; updates guide examples and wording to reference both Antigravity variants.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Suggested reviewers

msanatan

Poem

🐰 I hopped through gems and config lands,
Two clients now in careful hands,
IDE and 2.0 split the way,
Docs updated for what they say —
Happy hops on migration day! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating AntigravityConfigurator to use the migrated config path ~/.gemini/config/ after the 2.x migration.
Description check	✅ Passed	The description is comprehensive and follows the template structure with Type of Change (Bug fix), detailed explanation of the problem, and specific changes made.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Copilot

Pull request overview

Updates the Antigravity client configurator to match Antigravity 2.x’s post-migration MCP config location and to improve “installed” detection so auto-configure/auto-rewrite doesn’t skip fresh installs.

Changes:

Write Antigravity MCP config to ~/.gemini/config/mcp_config.json on all platforms (instead of the legacy ~/.gemini/antigravity/ runtime-state folder).
Override IsInstalled to detect Antigravity based on installer-created markers (e.g., ~/.antigravity/, gemini dirs, and /Applications/Antigravity.app on macOS).

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… IDE" The two Antigravity apps coexist on the same machine and use different MCP config paths, so they need to be separate configurators in the client list. - AntigravityConfigurator: renamed display label to "Antigravity 2.0" (path now ~/.gemini/config/mcp_config.json, already changed in the parent commit) and updated the installation-steps copy to match. - AntigravityIdeConfigurator (new): same JsonFile shape with serverUrl HTTP property, points at ~/.gemini/antigravity-ide/mcp_config.json where the IDE build keeps both its runtime state and its mcp_config. IsInstalled checks for that dedicated dir. Manual configuration guidance updated in README, README-zh, and MCP_CLIENT_CONFIGURATORS.md to reflect both clients side by side and spell out which path each one writes to.

Copilot AI review requested due to automatic review settings May 24, 2026 02:57

Copilot started reviewing on behalf of Scriptwonder May 24, 2026 02:57 View session

Copilot AI reviewed May 24, 2026

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Scriptwonder merged commit 2479c61 into CoplayDev:beta May 24, 2026
2 of 3 checks passed

Scriptwonder deleted the fix/antigravity-config-path-migrated branch May 24, 2026 03:13

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fix(clients): point Antigravity at ~/.gemini/config/ after the 2.x migration#1151

fix(clients): point Antigravity at ~/.gemini/config/ after the 2.x migration#1151
Scriptwonder merged 2 commits into
CoplayDev:betafrom
Scriptwonder:fix/antigravity-config-path-migrated

Scriptwonder commented May 24, 2026 •

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Scriptwonder commented May 24, 2026 •

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