Address PR review: guard mise env, document asdf plugin, update CLAUDE.md versions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leogdion

.mise.toml

@@ -1,4 +1,6 @@
 [tools]
 swiftlint = "0.63.2"
 periphery = "3.7.2"
+# Community asdf plugin — builds swift-format from source (no official binary releases)
+# Plugin repo: https://github.com/eelcokoelewijn/asdf-swift-format
 "asdf:eelcokoelewijn/asdf-swift-format" = "602.0.0"

CLAUDE.md

@@ -82,9 +82,9 @@ Sources/SyntaxKit/
 - **SwiftDocC Plugin** (1.4.0+) - Documentation generation
 
 ### Quality Tools
-- **SwiftFormat** (600.0.0) - Code formatting
-- **SwiftLint** (0.58.2) - Static analysis (90+ opt-in rules)
-- **Periphery** (3.0.1) - Unused code detection
+- **SwiftFormat** (602.0.0) - Code formatting
+- **SwiftLint** (0.63.2) - Static analysis (90+ opt-in rules)
+- **Periphery** (3.7.2) - Unused code detection
 
 ## Project Structure
 

Scripts/lint.sh

@@ -39,11 +39,13 @@ else
 	STRINGSLINT_OPTIONS="--config .stringslint.yml"
 fi
 
-pushd $PACKAGE_DIR
+pushd "$PACKAGE_DIR"
 if [ -z "$CI" ]; then
     mise install
 fi
-eval "$(mise env)"
+if command -v mise &> /dev/null; then
+    eval "$(mise env)"
+fi
 
 if [ -z "$CI" ]; then
 	run_command swift-format format $SWIFTFORMAT_OPTIONS  --recursive --parallel --in-place Sources Tests