Fix #97: Add daemon mode check to rename-prefix command

- Prevents nil pointer dereference when daemon is active
- Ensures direct mode or fails gracefully
- Lower Python requirement to 3.10+ for beads-mcp (#99)

Amp-Thread-ID: https://ampcode.com/threads/T-740c6f9c-b8f0-4155-8bfa-7075eea2df22
Co-authored-by: Amp <amp@ampcode.com>

cmd/bd/rename_prefix.go

@@ -35,6 +35,19 @@ Example:
 
 		ctx := context.Background()
 
+		// rename-prefix requires direct mode (not supported by daemon)
+		if daemonClient != nil {
+			if err := ensureDirectMode("daemon does not support rename-prefix command"); err != nil {
+				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+				os.Exit(1)
+			}
+		} else if store == nil {
+			if err := ensureStoreActive(); err != nil {
+				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+				os.Exit(1)
+			}
+		}
+
 		if err := validatePrefix(newPrefix); err != nil {
 			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
 			os.Exit(1)

integrations/beads-mcp/pyproject.toml

@@ -3,7 +3,7 @@ name = "beads-mcp"
 version = "0.10.1"
 description = "MCP server for beads issue tracker."
 readme = "README.md"
-requires-python = ">=3.11"
+requires-python = ">=3.10"
 license = {text = "MIT"}
 dependencies = [
     "fastmcp==2.12.4",
@@ -22,6 +22,7 @@ classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
@@ -56,7 +57,7 @@ warn_no_return = true
 warn_unreachable = true
 
 [tool.ruff]
-target-version = "py311"
+target-version = "py310"
 line-length = 115
 
 [tool.ruff.lint]