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feat(#2096): migrate Antigravity onto EoS declarative adapter + permission-writer + MCP companion (ADR-1239)

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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best-effort — raw schema unpublished).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>
This commit is contained in:
Tom Boucher
2026-07-11 02:27:57 -04:00
parent e3a8c063b8
commit 5695522d5f
19 changed files with 800 additions and 48 deletions
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12
src/shell-command-projection.cts
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@@ -98,9 +98,17 @@ export function formatManagedHookScriptToken(scriptPath: string, opts: { platfor
return JSON.stringify(scriptPath.replace(/\\/g, '/'));
}
export function projectLocalHookPrefix({ runtime = 'claude', dirName }: { runtime?: string; dirName?: string | null }): string | undefined | null {
export function projectLocalHookPrefix({ runtime: _runtime = 'claude', dirName, hookPathStyle }: { runtime?: string; dirName?: string | null; hookPathStyle?: string | null }): string | undefined | null {
if (!dirName) return dirName;
return (runtime === 'antigravity')
// Descriptor-driven (ADR-1239 / #2096): folded from a hardcoded
// `runtime === 'antigravity'` literal into the runtime's declared
// `hostBehaviors.hookPathStyle`. Runtimes that always run project hooks
// with the project dir as cwd (Antigravity today) declare 'raw' and get
// the bare dirName; every other runtime keeps the $CLAUDE_PROJECT_DIR-
// anchored prefix. `runtime` itself is now unused here but stays in the
// signature for call-site/back-compat parity (kept `_`-prefixed to
// satisfy no-unused-vars).
return (hookPathStyle === 'raw')
? dirName
: `"$CLAUDE_PROJECT_DIR"/${dirName}`;
}