### What problem does this PR solve?

Fix code debug may corrupt by history answer.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

Fix code component debug issue. #7908.

I delete the additions in #7933, there is no semantic meaning `output`
for `parameters`.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

Catch non-begin component output

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

Add code agent component.
#4977
### Type of change

- [x] New Feature (non-breaking change which adds functionality)