feat: v3.0.0 architecture overhaul

- Rename marketplace to lm-claude-plugins
- Move MCP servers to root with symlinks
- Add 6 PR tools to Gitea MCP (list_pull_requests, get_pull_request,
  get_pr_diff, get_pr_comments, create_pr_review, add_pr_comment)
- Add clarity-assist plugin (prompt optimization with ND accommodations)
- Add git-flow plugin (workflow automation)
- Add pr-review plugin (multi-agent review with confidence scoring)
- Centralize configuration docs
- Update all documentation for v3.0.0

BREAKING CHANGE: MCP server paths changed, marketplace renamed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/validate-marketplace.sh

@@ -73,6 +73,22 @@ for i in $(seq 0 $((PLUGIN_COUNT - 1))); do
         echo "WARNING: Missing 'repository' in marketplace entry for $PLUGIN_NAME"
     fi
 
+    # v3.0.0: Check category, tags, license fields
+    if ! jq -e ".plugins[$i].category" "$MARKETPLACE_JSON" >/dev/null; then
+        echo "ERROR: Missing 'category' in marketplace entry for $PLUGIN_NAME (required v3.0.0+)"
+        exit 1
+    fi
+
+    if ! jq -e ".plugins[$i].tags | type == \"array\"" "$MARKETPLACE_JSON" >/dev/null; then
+        echo "ERROR: Missing or invalid 'tags' array in marketplace entry for $PLUGIN_NAME (required v3.0.0+)"
+        exit 1
+    fi
+
+    if ! jq -e ".plugins[$i].license" "$MARKETPLACE_JSON" >/dev/null; then
+        echo "ERROR: Missing 'license' in marketplace entry for $PLUGIN_NAME (required v3.0.0+)"
+        exit 1
+    fi
+
     echo "✓ Marketplace entry $PLUGIN_NAME valid"
 done
 
@@ -135,5 +151,49 @@ for plugin_dir in "$PLUGINS_DIR"/*/; do
     echo "✓ $plugin_name valid"
 done
 
+# v3.0.0: Validate MCP server symlinks
+echo ""
+echo "=== Validating MCP Server Symlinks (v3.0.0+) ==="
+
+# Check shared MCP servers exist
+if [[ ! -d "$ROOT_DIR/mcp-servers/gitea" ]]; then
+    echo "ERROR: Shared gitea MCP server not found at mcp-servers/gitea/"
+    exit 1
+fi
+echo "✓ Shared gitea MCP server exists"
+
+if [[ ! -d "$ROOT_DIR/mcp-servers/netbox" ]]; then
+    echo "ERROR: Shared netbox MCP server not found at mcp-servers/netbox/"
+    exit 1
+fi
+echo "✓ Shared netbox MCP server exists"
+
+# Check symlinks for plugins that use MCP servers
+check_mcp_symlink() {
+    local plugin_name="$1"
+    local server_name="$2"
+    local symlink_path="$ROOT_DIR/plugins/$plugin_name/mcp-servers/$server_name"
+
+    if [[ -L "$symlink_path" ]]; then
+        # Verify symlink resolves correctly
+        if [[ -d "$symlink_path" ]]; then
+            echo "✓ $plugin_name -> $server_name symlink valid"
+        else
+            echo "ERROR: $plugin_name -> $server_name symlink broken (does not resolve)"
+            exit 1
+        fi
+    else
+        echo "ERROR: Missing symlink at plugins/$plugin_name/mcp-servers/$server_name"
+        exit 1
+    fi
+}
+
+# Plugins with gitea MCP dependency
+check_mcp_symlink "projman" "gitea"
+check_mcp_symlink "pr-review" "gitea"
+
+# Plugins with netbox MCP dependency
+check_mcp_symlink "cmdb-assistant" "netbox"
+
 echo ""
 echo "=== All validations passed ==="