Update the test and hero image

Author: Shashikant86

assets/rlm-lab.png

@@ -97,6 +97,14 @@ Risk assessment with **40+ rules**, 6 approval modes, and full audit logging to
 
 ---
 
+## 🖼️ RLM Research Lab
+
+<p align="center">
+  <img src="https://github.com/SuperagenticAI/rlm-code/raw/main/assets/rlm-lab.png" alt="RLM Research Lab" style="max-width: 100%; border-radius: 12px;">
+</p>
+
+---
+
 ## 🚀 Quick Start
 
 <div class="rlm-quickstart" markdown>

docs/index.md

@@ -69,7 +69,7 @@ def __init__(self, cwd: Path | None = None, shell: str | None = None):
         shell_base = Path(self.shell).name
         if shell_base == "zsh":
             rc_flags = ["--no-rcs", "--no-globalrcs"]
-        elif shell_base in ("bash", "sh"):
+        elif shell_base == "bash":
             rc_flags = ["--norc", "--noprofile"]
         else:
             rc_flags = []
@@ -114,10 +114,21 @@ def run(self, command: str, timeout: float = 30.0) -> ShellResult:
         wrapped = f'{command}\nprintf "{marker}:%s\\n" $?\n'
 
         with self._write_lock:
-            if self._proc.stdin is None:
-                raise RuntimeError("Shell stdin is unavailable.")
-            self._proc.stdin.write(wrapped)
-            self._proc.stdin.flush()
+            if self._proc.stdin is None or self._proc.poll() is not None:
+                return ShellResult(
+                    command=command,
+                    output="Shell process is not running.\n",
+                    exit_code=127,
+                )
+            try:
+                self._proc.stdin.write(wrapped)
+                self._proc.stdin.flush()
+            except (BrokenPipeError, OSError):
+                return ShellResult(
+                    command=command,
+                    output="Shell process pipe is closed.\n",
+                    exit_code=127,
+                )
 
         lines: list[str] = []
         exit_code = 1