diff --git a/README.md b/README.md
index 13273a7..ecea617 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,8 @@ This copies skills into:
 - `.github/skills/` for VS Code / GitHub Copilot
 - `.claude/skills/` for Claude Code (project-level)
 - `.cursor/skills/` for Cursor (project-level)
+- `.agent/skills/` for Antigravity
+- `.gemini/skills/` for Gemini CLI
 
 ### Install globally for Cursor
 
diff --git a/shared/scripts/skillpack-build.mjs b/shared/scripts/skillpack-build.mjs
index a5841de..4577ab7 100644
--- a/shared/scripts/skillpack-build.mjs
+++ b/shared/scripts/skillpack-build.mjs
@@ -5,16 +5,18 @@ function usage() {
   process.stderr.write(
     [
       "Usage:",
-      "  node shared/scripts/skillpack-build.mjs [--out=dist] [--targets=codex,vscode,claude,cursor] [--skills=skill1,skill2] [--clean]",
+      "  node shared/scripts/skillpack-build.mjs [--out=dist] [--targets=codex,vscode,claude,cursor,antigravity,gemini] [--skills=skill1,skill2] [--clean]",
       "",
       "Outputs:",
       "  - <out>/codex/.codex/skills/<skill>/SKILL.md",
       "  - <out>/vscode/.github/skills/<skill>/SKILL.md",
       "  - <out>/claude/.claude/skills/<skill>/SKILL.md",
       "  - <out>/cursor/.cursor/skills/<skill>/SKILL.md",
+      "  - <out>/antigravity/.agent/skills/<skill>/SKILL.md",
+      "  - <out>/gemini/.gemini/skills/<skill>/SKILL.md",
       "",
       "Options:",
-      "  --targets    Comma-separated list of targets (codex, vscode, claude, cursor). Default: codex,vscode,claude,cursor",
+      "  --targets    Comma-separated list of targets (codex, vscode, claude, cursor, antigravity, gemini). Default: codex,vscode,claude,cursor,antigravity,gemini",
       "  --skills     Comma-separated list of skill names to build. Default: all skills",
       "  --clean      Remove target directories before building",
       "",
@@ -26,7 +28,7 @@ function usage() {
 }
 
 function parseArgs(argv) {
-  const args = { out: "dist", targets: ["codex", "vscode", "claude", "cursor"], skills: [], clean: false };
+  const args = { out: "dist", targets: ["codex", "vscode", "claude", "cursor", "antigravity", "gemini"], skills: [], clean: false };
   for (const a of argv) {
     if (a === "--help" || a === "-h") args.help = true;
     else if (a === "--clean") args.clean = true;
@@ -101,6 +103,8 @@ function buildTarget({ repoRoot, outDir, target, skillDirs }) {
     vscode: path.join(outDir, "vscode", ".github", "skills"),
     claude: path.join(outDir, "claude", ".claude", "skills"),
     cursor: path.join(outDir, "cursor", ".cursor", "skills"),
+    antigravity: path.join(outDir, "antigravity", ".agent", "skills"),
+    gemini: path.join(outDir, "gemini", ".gemini", "skills"),
   };
   const destSkillsRoot = rootByTarget[target];
   assert(destSkillsRoot, `Unknown target: ${target}`);
@@ -117,7 +121,7 @@ function buildTarget({ repoRoot, outDir, target, skillDirs }) {
   process.stdout.write(`OK: built ${target} skillpack at ${rel}\n`);
 }
 
-const VALID_TARGETS = ["codex", "vscode", "claude", "cursor"];
+const VALID_TARGETS = ["codex", "vscode", "claude", "cursor", "antigravity", "gemini"];
 
 function main() {
   const args = parseArgs(process.argv.slice(2));
diff --git a/shared/scripts/skillpack-install.mjs b/shared/scripts/skillpack-install.mjs
index e9411aa..eca0b57 100644
--- a/shared/scripts/skillpack-install.mjs
+++ b/shared/scripts/skillpack-install.mjs
@@ -11,7 +11,7 @@ function usage() {
       "Options:",
       "  --dest=<path>       Destination repo root (required, unless using --global)",
       "  --from=<path>       Source directory (default: dist)",
-      "  --targets=<list>    Comma-separated targets: codex, vscode, claude, claude-global, cursor, cursor-global (default: codex,vscode)",
+      "  --targets=<list>    Comma-separated targets: codex, vscode, claude, claude-global, cursor, cursor-global, antigravity, gemini (default: codex,vscode)",
       "  --skills=<list>     Comma-separated skill names to install (default: all)",
       "  --mode=<mode>       'replace' (default) or 'merge'",
       "  --global            Shorthand for --targets=claude-global (installs to ~/.claude/skills)",
@@ -25,6 +25,8 @@ function usage() {
       "  claude-global       Install to ~/.claude/skills/ (user-level, ignores --dest)",
       "  cursor              Install to <dest>/.cursor/skills/",
       "  cursor-global       Install to ~/.cursor/skills/ (user-level, ignores --dest)",
+      "  antigravity         Install to <dest>/.agent/skills/",
+      "  gemini              Install to <dest>/.gemini/skills/",
       "",
       "Examples:",
       "  # Build and install to a WordPress project",
@@ -133,7 +135,7 @@ function listSkillDirs(skillsRoot) {
     .filter((d) => fs.existsSync(path.join(d, "SKILL.md")));
 }
 
-const VALID_TARGETS = ["codex", "vscode", "claude", "claude-global", "cursor", "cursor-global"];
+const VALID_TARGETS = ["codex", "vscode", "claude", "claude-global", "cursor", "cursor-global", "antigravity", "gemini"];
 
 // Map target to source subdirectory in dist
 function getSourceDir(fromDir, target) {
@@ -145,6 +147,8 @@ function getSourceDir(fromDir, target) {
     vscode: path.join(fromDir, "vscode", ".github", "skills"),
     claude: path.join(fromDir, "claude", ".claude", "skills"),
     cursor: path.join(fromDir, "cursor", ".cursor", "skills"),
+    antigravity: path.join(fromDir, "antigravity", ".agent", "skills"),
+    gemini: path.join(fromDir, "gemini", ".gemini", "skills"),
   };
   return targetDirMap[sourceTarget];
 }
@@ -165,6 +169,8 @@ function getDestDir(destRepoRoot, target) {
     vscode: path.join(destRepoRoot, ".github", "skills"),
     claude: path.join(destRepoRoot, ".claude", "skills"),
     cursor: path.join(destRepoRoot, ".cursor", "skills"),
+    antigravity: path.join(destRepoRoot, ".agent", "skills"),
+    gemini: path.join(destRepoRoot, ".gemini", "skills"),
   };
   return destDirMap[target];
 }
@@ -220,7 +226,7 @@ function installTarget({ fromDir, destRepoRoot, target, skillsFilter, mode, dryR
 
 function listAvailableSkills(fromDir) {
   // Check all possible target sources
-  const sources = ["codex", "vscode", "claude", "cursor"]
+  const sources = ["codex", "vscode", "claude", "cursor", "antigravity", "gemini"]
     .map((t) => getSourceDir(fromDir, t))
     .filter((p) => fs.existsSync(p));