Files
msd-core/capabilities/antigravity/capability.json
Tom Boucher 5695522d5f feat(#2096): migrate Antigravity onto EoS declarative adapter + permission-writer + MCP companion (ADR-1239)
Fold all antigravity literal branches into descriptor-driven reads:
getConfigDirFromHome (→ configHome.kind 'dot-home-nested'), projectLocalHookPrefix
(→ hostBehaviors.hookPathStyle 'raw'), applyAgentPathRewrites (→ noPathRewrite),
getProjectInstructionFile (→ projectInstructionFile 'GEMINI.md'); removed the dead
inline convertClaudeAgentToAntigravityAgent branch + dead isAntigravity
destructures (antigravity is already on the descriptor-agents path). subagentToolkit
flipped undocumented→full (Context7: antigravity.google/docs/cli/features);
namedDispatch/nested/maxDepth/backgroundDispatch stay undocumented. Byte-identical
golden parity for all 16 runtimes.

UPGRADE 1 (permission-writer): permissionWriter 'antigravity' + configureAntigravityPermissions
merges a scoped permissions.allow block (GSD's own tree + hooks) into Antigravity's
settings.json — non-destructive, idempotent, symmetric uninstall. Added to
VALID_PERMISSION_WRITERS + the FinishPermissionWriter union.
UPGRADE 2 (MCP companion): configureAntigravityMcpConfig writes mcp_config.json
registering the gsd-core companion MCP server (Gemini-successor mcpServers schema,
best-effort — raw schema unpublished). Both writers dispatch from finishInstall.
settings.json is golden-excluded (HOOK_CONFIG_FILES); mcp_config.json (portable,
no absolute paths) is golden-tracked → only antigravity.json changes.

Tests: declarative-reference-antigravity extended (source-grep guard across 4
modules, fail-closed for the 4 undocumented sub-axes, validator acceptance) +
antigravity-upgrades (permission-writer + mcp_config live-install, idempotency,
user-preservation). Matrix + ADR-1016 + capability-manifest + CONTEXT.md +
connect-gsd-mcp-server docs updated; changeset (Changed).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-11 03:07:01 -04:00

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JSON

{
"id": "antigravity",
"role": "runtime",
"version": "1.7.0-rc.5",
"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"
}
]
},
"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"
},
"modelMode": "passive",
"hookBus": "host",
"stateIO": "filesystem",
"transport": "mcp",
"runtime": "go"
},
"hostBehaviors": {
"reviewerCli": true,
"projectInstructionFile": "GEMINI.md",
"noPathRewrite": true,
"hookPathStyle": "raw",
"globalDirResolver": "antigravity"
}
}
}