revert: undo multiplicity merge (PR #480) to investigate Moo regression

AGENTS.md

@@ -198,20 +198,6 @@ The perl_test_runner.pl sets these automatically based on the test file being ru
 
 ### Commits
 
-- **Single quotes in commit messages:** The `$(cat <<'EOF' ... EOF)` heredoc pattern breaks when the message body contains single quotes (e.g., Perl's `$_`, `don't`). Write the message to a temp file and use `git commit -F` instead:
-  ```bash
-  cat > /tmp/commit_msg.txt << 'ENDMSG'
-  feat: description here
-
-  Body with single quotes like $_ and don't is fine.
-
-  Generated with [TOOL_NAME](TOOL_DOCS_URL)
-
-  Co-Authored-By: TOOL_NAME <TOOL_BOT_EMAIL>
-  ENDMSG
-  git commit -F /tmp/commit_msg.txt
-  ```
-  Replace `TOOL_NAME`, `TOOL_DOCS_URL`, and `TOOL_BOT_EMAIL` as described in [AI_POLICY.md](AI_POLICY.md).
 - Reference the design doc or issue in commit messages when relevant
 - Use conventional commit format when possible
 - **Write commit messages to a file** to avoid shell quoting issues (apostrophes, backticks, special characters). Use `git commit -F /tmp/commit_msg.txt` instead of `-m`:

dev/design/README.md

@@ -113,9 +113,9 @@ When adding new design documents:
 
 For the most important architectural decisions and current work, check:
 
-- **concurrency.md** - Unified concurrency design (supersedes multiplicity.md, fork.md, threads.md). Includes multiplicity demo and progress tracking.
+- **multiplicity.md** - Multiple independent Perl runtimes (enables fork/threads/web concurrency)
 - **jsr223-perlonjava-web.md** - JSR-223 compliance and web server integration
-- **multiplicity.md** / **fork.md** / **threads.md** - Superseded by concurrency.md
+- **fork.md** / **threads.md** - Concurrency model and limitations
 
 These represent major architectural directions for the project.
 

src/main/java/org/perlonjava/app/cli/Main.java

@@ -4,7 +4,6 @@
 import org.perlonjava.runtime.runtimetypes.ErrorMessageUtil;
 import org.perlonjava.runtime.runtimetypes.GlobalVariable;
 import org.perlonjava.runtime.runtimetypes.PerlExitException;
-import org.perlonjava.runtime.runtimetypes.PerlRuntime;
 import org.perlonjava.runtime.runtimetypes.RuntimeScalar;
 
 import java.util.Locale;
@@ -27,9 +26,6 @@ public class Main {
      * @param args Command-line arguments.
      */
     public static void main(String[] args) {
-        // Initialize the PerlRuntime for the main thread
-        PerlRuntime.initialize();
-
         CompilerOptions parsedArgs = ArgumentParser.parseArguments(args);
 
         if (parsedArgs.code == null) {