feat: add docker_volumes config for custom volume mounts

cli.py

@@ -285,6 +285,7 @@ def load_cli_config() -> Dict[str, Any]:
         "container_memory": "TERMINAL_CONTAINER_MEMORY",
         "container_disk": "TERMINAL_CONTAINER_DISK",
         "container_persistent": "TERMINAL_CONTAINER_PERSISTENT",
+        "docker_volumes": "TERMINAL_DOCKER_VOLUMES",
         # Sudo support (works with all backends)
         "sudo_password": "SUDO_PASSWORD",
     }
@@ -297,7 +298,12 @@ def load_cli_config() -> Dict[str, Any]:
     for config_key, env_var in env_mappings.items():
         if config_key in terminal_config:
             if _file_has_terminal_config or env_var not in os.environ:
-                os.environ[env_var] = str(terminal_config[config_key])
+                val = terminal_config[config_key]
+                if isinstance(val, list):
+                    import json
+                    os.environ[env_var] = json.dumps(val)
+                else:
+                    os.environ[env_var] = str(val)
     
     # Apply browser config to environment variables
     browser_config = defaults.get("browser", {})

tools/environments/docker.py

@@ -51,6 +51,7 @@ class DockerEnvironment(BaseEnvironment):
         disk: int = 0,
         persistent_filesystem: bool = False,
         task_id: str = "default",
+        volumes: list = None,
         network: bool = True,
     ):
         super().__init__(cwd=cwd, timeout=timeout)
@@ -58,6 +59,11 @@ class DockerEnvironment(BaseEnvironment):
         self._persistent = persistent_filesystem
         self._task_id = task_id
         self._container_id: Optional[str] = None
+        logger.info(f"DockerEnvironment volumes: {volumes}")
+        # Ensure volumes is a list (config.yaml could be malformed)
+        if volumes is not None and not isinstance(volumes, list):
+            logger.warning(f"docker_volumes config is not a list: {volumes!r}")
+            volumes = []
 
         from minisweagent.environments.docker import DockerEnvironment as _Docker
 
@@ -99,10 +105,26 @@ class DockerEnvironment(BaseEnvironment):
         # All containers get full security hardening (read-only root + writable
         # mounts for the workspace). Persistence uses Docker volumes, not
         # filesystem layer commits, so --read-only is always safe.
-        all_run_args = list(_SECURITY_ARGS) + writable_args + resource_args
+        # User-configured volume mounts (from config.yaml docker_volumes)
+        volume_args = []
+        for vol in (volumes or []):
+            if not isinstance(vol, str):
+                logger.warning(f"Docker volume entry is not a string: {vol!r}")
+                continue
+            vol = vol.strip()
+            if not vol:
+                continue
+            if ":" in vol:
+                volume_args.extend(["-v", vol])
+            else:
+                logger.warning(f"Docker volume '{vol}' missing colon, skipping")
+
+        logger.info(f"Docker volume_args: {volume_args}")
+        all_run_args = list(_SECURITY_ARGS) + writable_args + resource_args + volume_args
+        logger.info(f"Docker run_args: {all_run_args}")
 
         self._inner = _Docker(
-            image=effective_image, cwd=cwd, timeout=timeout,
+            image=image, cwd=cwd, timeout=timeout,
             run_args=all_run_args,
         )
         self._container_id = self._inner.container_id

tools/file_tools.py

@@ -81,11 +81,20 @@ def _get_file_ops(task_id: str = "default") -> ShellFileOperations:
             cwd = overrides.get("cwd") or config["cwd"]
             logger.info("Creating new %s environment for task %s...", env_type, task_id[:8])
 
+            container_config = None
+            if env_type in ("docker", "singularity", "modal"):
+                container_config = {
+                    "container_cpu": config.get("container_cpu", 1),
+                    "container_memory": config.get("container_memory", 5120),
+                    "container_disk": config.get("container_disk", 51200),
+                    "container_persistent": config.get("container_persistent", True),
+                }
             terminal_env = _create_environment(
                 env_type=env_type,
                 image=image,
                 cwd=cwd,
                 timeout=config["timeout"],
+                container_config=container_config,
             )
 
             with _env_lock:

tools/terminal_tool.py

@@ -445,6 +445,7 @@ def _get_env_config() -> Dict[str, Any]:
         "container_memory": int(os.getenv("TERMINAL_CONTAINER_MEMORY", "5120")),     # MB (default 5GB)
         "container_disk": int(os.getenv("TERMINAL_CONTAINER_DISK", "51200")),        # MB (default 50GB)
         "container_persistent": os.getenv("TERMINAL_CONTAINER_PERSISTENT", "true").lower() in ("true", "1", "yes"),
+        "docker_volumes": json.loads(os.getenv("TERMINAL_DOCKER_VOLUMES", "[]")),
     }
 
 
@@ -471,6 +472,7 @@ def _create_environment(env_type: str, image: str, cwd: str, timeout: int,
     memory = cc.get("container_memory", 5120)
     disk = cc.get("container_disk", 51200)
     persistent = cc.get("container_persistent", True)
+    volumes = cc.get("docker_volumes", [])
 
     if env_type == "local":
         return _LocalEnvironment(cwd=cwd, timeout=timeout)
@@ -480,6 +482,7 @@ def _create_environment(env_type: str, image: str, cwd: str, timeout: int,
             image=image, cwd=cwd, timeout=timeout,
             cpu=cpu, memory=memory, disk=disk,
             persistent_filesystem=persistent, task_id=task_id,
+            volumes=volumes,
         )
     
     elif env_type == "singularity":
@@ -848,6 +851,7 @@ def terminal_tool(
                                 "container_memory": config.get("container_memory", 5120),
                                 "container_disk": config.get("container_disk", 51200),
                                 "container_persistent": config.get("container_persistent", True),
+                                "docker_volumes": config.get("docker_volumes", []),
                             }
 
                         new_env = _create_environment(