feat(agent-loop): make agent-loop available on Antigravity

- Add Antigravity manifest (.antigravity-plugin/plugin.json) with commands and skills mappings.
- Add helper script scripts/install-antigravity.sh to install/symlink plugins to Antigravity config directory.
- Update scripts/validate-plugins.sh to validate commands and agents.
- Bump agent-loop version to 0.3.0.

Co-Authored-By: duyetbot <duyetbot@users.noreply.github.com>

Author: duyet

CLAUDE.md

@@ -9,12 +9,21 @@
 
 Alternative: `npx skills add duyet/codex-claude-plugins` ([skills.sh](https://skills.sh))
 
+### Antigravity Installation
+
+For Antigravity CLI, install/symlink a plugin locally for development:
+
+```bash
+./scripts/install-antigravity.sh <plugin-name>  # Or 'all' to install all
+```
+
 ## Plugin Metadata
 
 Codex plugin metadata is maintained beside Claude metadata in each plugin:
 
 - Claude manifest: `.claude-plugin/plugin.json`
 - Codex manifest: `.codex-plugin/plugin.json`
+- Antigravity manifest: `.antigravity-plugin/plugin.json`
 - Claude marketplace: `marketplace.json` and `.claude-plugin/marketplace.json`
 - Codex marketplace: `.agents/plugins/marketplace.json`
 

agent-loop/.antigravity-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "agent-loop",
+  "version": "0.3.0",
+  "description": "Continuous agent loop for overnight/day repository maintenance. Orchestrates triage, autoreview, browser automation, and parallel agent work across threads. Wake every 5 min, direct work to threads, land autonomously.",
+  "author": { "name": "duyetbot" },
+  "license": "MIT",
+  "skills": "./skills/",
+  "commands": "./commands/"
+}

agent-loop/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "agent-loop",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "Continuous agent loop for overnight/day repository maintenance. Orchestrates triage, autoreview, browser automation, and parallel agent work across threads. Wake every 5 min, direct work to threads, land autonomously.",
   "author": { "name": "duyetbot" },
   "license": "MIT"

agent-loop/.codex-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "agent-loop",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "Continuous agent loop for overnight/day repository maintenance. Orchestrates triage, autoreview, browser automation, and parallel agent work across threads. Wake every 5 min, direct work to threads, land autonomously.",
   "author": { "name": "duyetbot" },
   "license": "MIT",

agent-loop/CLAUDE.md

@@ -4,14 +4,16 @@ Continuous overnight/day repository maintenance with autonomous agent loops.
 
 ## Version
 
-0.2.0
+0.3.0
 
 ## Plugin Structure
 
 ```text
 agent-loop/
+├── .antigravity-plugin/
+│   └── plugin.json          # Antigravity manifest (version 0.3.0)
 ├── .claude-plugin/
-│   └── plugin.json          # Manifest (version 0.2.0)
+│   └── plugin.json          # Manifest (version 0.3.0)
 ├── commands/                # Slash commands
 ├── skills/                  # Reusable knowledge
 │   ├── agent-loop-orchestrator/

agent-loop/README.md

@@ -8,7 +8,7 @@ Wake every 5m ──► Triage repos ──► Dispatch threads ──► Track
 
 ## Version
 
-0.2.0
+0.3.0
 
 ## Overview
 
@@ -85,10 +85,12 @@ Sources adapted for the agent-loop plugin:
 
 ```text
 agent-loop/
+├── .antigravity-plugin/
+│   └── plugin.json          # Antigravity manifest (version 0.3.0)
 ├── .claude-plugin/
-│   └── plugin.json          # Manifest (version 0.2.0)
+│   └── plugin.json          # Manifest (version 0.3.0)
 ├── .codex-plugin/
-│   └── plugin.json          # Codex manifest
+│   └── plugin.json          # Codex manifest (version 0.3.0)
 ├── commands/                # Slash commands
 │   ├── start.md
 │   ├── stop.md

marketplace.json

@@ -175,7 +175,7 @@
       "name": "agent-loop",
       "id": "agent-loop@duyet-claude-plugins",
       "description": "Continuous agent loop for overnight/day repository maintenance. Orchestrates triage, autoreview, browser automation, and parallel agent work across threads. Wake every 5 min, direct work, land autonomously.",
-      "version": "0.2.0",
+      "version": "0.3.0",
       "type": "skill",
       "category": "automation"
     },

scripts/install-antigravity.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+# Install plugins to Antigravity CLI.
+# Usage: ./scripts/install-antigravity.sh [plugin-name | all]
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TARGET_DIR="$HOME/.gemini/config/plugins"
+
+# Find plugins with Antigravity manifests
+find_antigravity_plugins() {
+  find "$REPO_ROOT" -maxdepth 3 -path "*/.antigravity-plugin/plugin.json" -not -path "*/node_modules/*" | while read -r manifest; do
+    basename "$(dirname "$(dirname "$manifest")")"
+  done
+}
+
+PLUGINS=($(find_antigravity_plugins))
+
+if [ ${#PLUGINS[@]} -eq 0 ]; then
+  echo "No plugins with .antigravity-plugin/plugin.json found in the repository."
+  exit 0
+fi
+
+# Check argument
+if [ $# -eq 0 ]; then
+  echo "Available Antigravity plugins:"
+  for p in "${PLUGINS[@]}"; do
+    echo "  - $p"
+  done
+  echo ""
+  echo "Run: $0 <plugin-name>  (or '$0 all' to install all)"
+  exit 0
+fi
+
+install_plugin() {
+  local name="$1"
+  local dir="$REPO_ROOT/$name"
+  local manifest="$dir/.antigravity-plugin/plugin.json"
+
+  if [ ! -f "$manifest" ]; then
+    echo "❌ Plugin '$name' does not have an Antigravity manifest (.antigravity-plugin/plugin.json)."
+    return 1
+  fi
+
+  local dest="$TARGET_DIR/$name"
+  echo "Installing '$name' to '$dest'..."
+  mkdir -p "$dest"
+
+  # Symlink manifest
+  ln -sfn "$manifest" "$dest/plugin.json"
+  echo "  - Linked plugin.json"
+
+  # Read manifest using Python to parse JSON and output relative paths
+  local fields
+  fields=$(python3 - "$manifest" <<'PYEOF'
+import json, sys
+data = json.load(open(sys.argv[1]))
+for key in ["skills", "commands", "hooks", "mcpServers", "apps", "agents"]:
+    if key in data and isinstance(data[key], str) and data[key].startswith("./"):
+        print(f"{key}:{data[key]}")
+PYEOF
+)
+
+  for f in $fields; do
+    local key="${f%%:*}"
+    local rel_path="${f#*:}"
+    # Normalize relative path
+    local src_dir
+    src_dir=$(cd "$dir" && cd "$rel_path" && pwd)
+    ln -sfn "$src_dir" "$dest/$key"
+    echo "  - Linked $key -> $rel_path"
+  done
+
+  echo "✅ Successfully installed '$name' to Antigravity!"
+  echo "Restart your Antigravity session/CLI to load the plugin."
+}
+
+if [ "$1" = "all" ]; then
+  for p in "${PLUGINS[@]}"; do
+    install_plugin "$p"
+  done
+else
+  install_plugin "$1"
+fi

scripts/validate-plugins.sh

@@ -68,8 +68,8 @@ if isinstance(skills, list):
             elif not os.path.isfile(os.path.join(plugin_dir, path_value)):
                 errors.append(f"skills[{i}]: path '{path_value}' does not exist")
 
-if mode == "codex":
-    for field in ("skills", "hooks", "mcpServers", "apps"):
+if mode in ("codex", "antigravity"):
+    for field in ("skills", "hooks", "mcpServers", "apps", "commands", "agents"):
         value = data.get(field)
         if value is None:
             continue
@@ -80,6 +80,7 @@ if mode == "codex":
         if not os.path.exists(target):
             errors.append(f"'{field}' path does not exist: {value}")
 
+if mode == "codex":
     interface = data.get("interface")
     if not isinstance(interface, dict):
         errors.append("'interface' must be an object")
@@ -137,20 +138,27 @@ for plugin in plugin_dirs:
     if not os.path.isfile(claude_path):
         errors.append(f"{plugin}: missing .claude-plugin/plugin.json")
         continue
-    if not os.path.isfile(codex_path):
-        # No Codex manifest means the plugin doesn't support Codex — skip parity check
-        continue
-
     with open(claude_path) as f:
         claude = json.load(f)
-    with open(codex_path) as f:
-        codex = json.load(f)
 
-    for field in ("name", "version", "description"):
-        if claude.get(field) != codex.get(field):
-            errors.append(f"{plugin}: {field} differs between Claude and Codex manifests")
-    if claude.get("author", {}).get("name") != codex.get("author", {}).get("name"):
-        errors.append(f"{plugin}: author.name differs between Claude and Codex manifests")
+    if os.path.isfile(codex_path):
+        with open(codex_path) as f:
+            codex = json.load(f)
+        for field in ("name", "version", "description"):
+            if claude.get(field) != codex.get(field):
+                errors.append(f"{plugin}: {field} differs between Claude and Codex manifests")
+        if claude.get("author", {}).get("name") != codex.get("author", {}).get("name"):
+            errors.append(f"{plugin}: author.name differs between Claude and Codex manifests")
+
+    antigravity_path = os.path.join(repo_root, plugin, ".antigravity-plugin", "plugin.json")
+    if os.path.isfile(antigravity_path):
+        with open(antigravity_path) as f:
+            antigravity = json.load(f)
+        for field in ("name", "version", "description"):
+            if claude.get(field) != antigravity.get(field):
+                errors.append(f"{plugin}: {field} differs between Claude and Antigravity manifests")
+        if claude.get("author", {}).get("name") != antigravity.get("author", {}).get("name"):
+            errors.append(f"{plugin}: author.name differs between Claude and Antigravity manifests")
 
 if errors:
     for error in errors:
@@ -258,7 +266,13 @@ while IFS= read -r -d '' manifest; do
   check "Codex manifest: $plugin_name" validate_manifest "$manifest" codex
 done < <(find "$REPO_ROOT" -path "*/.codex-plugin/plugin.json" -not -path "*/node_modules/*" -print0 | sort -z)
 
-check "Claude/Codex manifest parity" validate_cross_manifest
+while IFS= read -r -d '' manifest; do
+  plugin_dir="$(dirname "$(dirname "$manifest")")"
+  plugin_name="$(basename "$plugin_dir")"
+  check "Antigravity manifest: $plugin_name" validate_manifest "$manifest" antigravity
+done < <(find "$REPO_ROOT" -path "*/.antigravity-plugin/plugin.json" -not -path "*/node_modules/*" -print0 | sort -z)
+
+check "Claude/Codex/Antigravity manifest parity" validate_cross_manifest
 check "Marketplace files" validate_marketplaces
 
 echo ""