[BUG] Heredoc delimiter absorbs trailing control operator (`;`, `|`, `&&`) causing valid commands to be rejected as unterminated

[daewoongoh]

Problem (one or two sentences)

When a heredoc opener line is followed by a control operator on the same line (e.g. << EOF; echo done), the parser absorbs the control operator into the heredoc delimiter. The terminator line is then never found, and a valid command is incorrectly rejected as an unterminated heredoc.

Context (who is affected and when)

Affects any user running shell commands that combine a heredoc with a control operator on the opener line — a common pattern such as cat << EOF | grep pattern or sh -c '...' << EOF && next. The command is mis-parsed and treated as a syntax error, so it cannot be executed or auto-approved correctly.

Reproduction steps

1. Environment: Zoo Code extension, any OS, any API provider.

2. Enter a command that uses a heredoc with a control operator on the opener line, e.g.:

   sh -c bash << EOF; echo done
   echo hello
   EOF
   

   or

   sh -c bash << EOF | grep hi
   echo hello
   EOF
   

3. Observe that the command is parsed as an unterminated heredoc (parse error) instead of a single valid heredoc command.

Expected result

The heredoc is recognized as a single valid command. The delimiter is EOF (the control operator terminates the delimiter word), and the terminator line EOF is found correctly.

Actual result

The delimiter incorrectly becomes EOF; echo done (or EOF | grep hi), the terminator line is never matched, and the whole valid command is reported as an unterminated heredoc.

Variations tried (optional)

All three control operators (;, |, &&) reproduce the issue. Quoted delimiters (<< 'EOF') are not affected.

App Version

v3.74.0

API Provider (optional)

None

Model Used (optional)

No response

Zoo Code Task Links (optional)

No response

Relevant logs or errors (optional)

{
    "type": "tool_result",
    "tool_use_id": "chatcmpl-tool-95e9934ee1b0601f",
    "content": "{\"status\":\"error\",\"message\":\"The tool execution failed\",\"error\":\"Malformed command: unterminated heredoc (<<) at position 4 -- near: `cat <<EOF; echo \\\"--- don...`. \"}"
}