{
  "id": "antigravity",
  "role": "runtime",
  "version": "1.11.0",
  "title": "Antigravity",
  "description": "Google Antigravity IDE — nested under ~/.gemini/antigravity; probed across 1.x and 2.x layouts; Gemini hook event dialect; flat skill layout; tier-1 support.",
  "tier": "core",
  "requires": [],
  "engines": {
    "gsd": ">=1.6.0"
  },
  "runtime": {
    "configHome": {
      "kind": "dot-home-nested",
      "name": "antigravity",
      "parent": ".gemini",
      "env": [
        "ANTIGRAVITY_CONFIG_DIR"
      ],
      "probe": [
        "antigravity",
        "antigravity-ide",
        "antigravity-cli"
      ],
      "probeExists": "gsd-core/VERSION"
    },
    "localConfigDir": ".agents",
    "configFormat": "settings-json",
    "artifactLayout": {
      "global": [
        {
          "kind": "skills",
          "destSubpath": "skills",
          "prefix": "gsd-",
          "nesting": "flat",
          "recursive": false,
          "converter": "convertClaudeCommandToAntigravitySkill"
        },
        {
          "kind": "agents",
          "destSubpath": "agents",
          "prefix": "gsd-",
          "nesting": "flat",
          "recursive": false,
          "converter": "convertClaudeAgentToAntigravityAgent"
        }
      ],
      "local": [
        {
          "kind": "skills",
          "destSubpath": "skills",
          "prefix": "gsd-",
          "nesting": "flat",
          "recursive": false,
          "converter": "convertClaudeCommandToAntigravitySkill"
        },
        {
          "kind": "agents",
          "destSubpath": "agents",
          "prefix": "gsd-",
          "nesting": "flat",
          "recursive": false,
          "converter": "convertClaudeAgentToAntigravityAgent"
        }
      ]
    },
    "triggerPrecedence": [
      "skills",
      "commands"
    ],
    "commandStyle": "slash-hyphen",
    "hooksSurface": "settings-json",
    "hookEvents": "gemini",
    "sandboxTier": "none",
    "supportTier": 1,
    "installSurface": "settings-json",
    "writesSharedSettings": true,
    "permissionWriter": "antigravity",
    "extendedHookEvents": [],
    "hostIntegration": {
      "embeddingMode": "declarative",
      "commandSurface": "slash-file",
      "dispatch": {
        "namedDispatch": "undocumented",
        "nested": "undocumented",
        "maxDepth": "undocumented",
        "background": true,
        "subagentToolkit": "full",
        "backgroundDispatch": "undocumented",
        "isolation": "undocumented"
      },
      "modelMode": "passive",
      "hookBus": "host",
      "stateIO": "filesystem",
      "transport": "mcp",
      "runtime": "go",
      "effortSurface": "undocumented"
    },
    "hostBehaviors": {
      "projectInstructionFile": "GEMINI.md",
      "noPathRewrite": true,
      "hookPathStyle": "raw",
      "globalDirResolver": "antigravity"
    }
  },
  "reviewer": {
    "slug": "antigravity",
    "flags": [
      "--antigravity",
      "--agy"
    ],
    "transport": "spawn",
    "probe": {
      "kind": "command-exists",
      "binary": "agy"
    },
    "invoke": {
      "binary": "agy",
      "args": [
        "--print-timeout",
        "540s",
        "{{model}}",
        "-p",
        "{{prompt}}"
      ],
      "promptChannel": "argv-file-ref",
      "outputChannel": "stdout",
      "modelArg": "--model",
      "effortChannel": "none"
    },
    "timeoutFloorMs": 600000,
    "emptyOutput": "handler-owned",
    "reviewsSection": "Antigravity",
    "evidenceClass": "source-grounded",
    "requiresBinaries": [],
    "promptBudgetKey": "review.max_prompt_tokens_per_reviewer.antigravity",
    "modelConfigKey": "review.models.agy",
    "handler": "antigravity"
  },
  "config": {
    "review.models.agy": {
      "type": "string",
      "default": "",
      "description": "Model passed to the Antigravity reviewer lane. The key suffix is the lane binary/flag alias `agy`, not the slug `antigravity` — preserved verbatim so existing .planning/config.json files keep working."
    },
    "review.max_prompt_tokens_per_reviewer.antigravity": {
      "type": "number",
      "default": -1,
      "description": "Prompt-token budget for the Antigravity reviewer lane. Unset is -1, a sentinel: 0 is a legitimate value meaning \"do not trim this lane\", so it cannot double as \"not configured\". Keyed on the reviewer slug `antigravity`, not the `agy` binary alias used by review.models.agy."
    }
  }
}