diff --git a/joj3_config_generator/convert.py b/joj3_config_generator/convert.py
index ebed91f..fa4a7aa 100644
--- a/joj3_config_generator/convert.py
+++ b/joj3_config_generator/convert.py
@@ -1,9 +1,7 @@
 import os
-from pathlib import Path
 from typing import List
 
 from joj3_config_generator.models import joj1, repo, result, task
-from joj3_config_generator.processers.joj1 import get_joj1_run_stage
 from joj3_config_generator.processers.repo import (
     get_healthcheck_config,
     get_teapot_stage,
@@ -54,13 +52,4 @@ def convert(repo_conf: repo.Config, task_conf: task.Config) -> result.Config:
 
 
 def convert_joj1(joj1_conf: joj1.Config) -> task.Config:
-    stages = [get_joj1_run_stage(joj1_conf)]
-    return task.Config(
-        root=Path(""),
-        path=Path(""),
-        task=task.Task(
-            name=(""),
-        ),
-        release=task.Release(),
-        stages=stages,
-    )
+    return task.Config()
diff --git a/joj3_config_generator/models/task.py b/joj3_config_generator/models/task.py
index 8408fda..212c914 100644
--- a/joj3_config_generator/models/task.py
+++ b/joj3_config_generator/models/task.py
@@ -122,13 +122,13 @@ class Release(BaseModel):
 
 
 class Task(BaseModel):
-    type_: str = Field("", serialization_alias="type", validation_alias="type")
-    name: str
+    type_: str = Field("unknown", serialization_alias="type", validation_alias="type")
+    name: str = "unknown"
 
 
 class Config(BaseModel):
     root: Path = Path(".")
     path: Path = Path("task.toml")
-    task: Task  # Task name (e.g., hw3 ex5)
-    release: Release  # Release configuration
-    stages: List[Stage]  # list of stage configurations
+    task: Task = Task()  # Task name (e.g., hw3 ex5)
+    release: Release = Release()  # Release configuration
+    stages: List[Stage] = []  # list of stage configurations
diff --git a/joj3_config_generator/processers/joj1.py b/joj3_config_generator/processers/joj1.py
deleted file mode 100644
index ce34599..0000000
--- a/joj3_config_generator/processers/joj1.py
+++ /dev/null
@@ -1,31 +0,0 @@
-from joj3_config_generator.models import joj1, task
-from joj3_config_generator.models.common import Memory, Time
-
-
-def get_joj1_run_stage(joj1_config: joj1.Config) -> task.Stage:
-    cases_conf = []
-    for i, case in enumerate(joj1_config.cases):
-        cases_conf.append(
-            task.Stage(
-                score=case.score,
-                command=case.execute_args if case.execute_args else "",
-                limit=task.Limit(cpu=Time(case.time), mem=Memory(case.memory)),
-            )
-        )
-    for i, case in enumerate(joj1_config.cases):
-        cases_conf[i].in_ = case.input
-        cases_conf[i].out_ = case.output
-    run_config = task.Stage(
-        name="This is the converted joj1 run stage",
-        parsers=["diff", "result-status"],
-        score=100,
-        limit=task.Limit(
-            cpu=Time(joj1_config.cases[0].time),
-            mem=Memory(joj1_config.cases[0].memory),
-        ),
-        cases={f"case{i}": cases_conf[i] for i, _ in enumerate(cases_conf)},
-    )  # TODO: no strong pattern match here, use dict instead
-    return run_config
-
-
-# TODO: get formatted joj1 config, match the criterion in the doc