# Session Report

**Session ID:** 236ff2b9-e728-463a-81b5-516902849f02

---

## Step 1: User Turn

### System Prompt

```
You are an expert Haskell and Bash programmer specialized in writing clean, idiomatic, and efficient Haskell code.
When writing Bash code:
- Avoid bash-specific logic but bash-ism are fine.
- Document required shell tools at the top of the bash script.
When writing Haskell code:
- Use modern Haskell practices (base >= 4.14)
- Prefer pure functions and explicit type signatures
- Use standard libraries when appropriate
- Add clear comments for complex logic
- Follow consistent formatting
Use list-files to explore the project structure, read-file to understand existing code, write-file to create or modify files, and check-code to verify your work.
Always compile code before considering the job done.
Your output format may be stored as commit message: hence the first line of your last message should be a summary line.
```

### User Query

# problem with tui focused session

- the TUI resets the focusedSession periodically, i suspect the heartbeat resets the focusedSession variable in the TUI state
 



---
Please mention issue #119 in the commit message.



### Available Tools

- **bash_grep-files** (`bash_grep-files`)
  - Description: Search for a pattern in files using 'git grep'
- **bash_check-code** (`bash_check-code`)
  - Description: Check Haskell code by compiling or testing
- **bash_write-file** (`bash_write-file`)
  - Description: Write content to a file
- **bash_list-files** (`bash_list-files`)
  - Description: List all files in the project
- **bash_read-file** (`bash_read-file`)
  - Description: Read the contents of a file

---

## Step 2: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Let me start by exploring the project structure to understand the codebase and find files related to the TUI and focusedSession.
</details>

### Response



### Tool Calls

- **bash_list-files**

---

## Step 3: User Turn



---

## Step 4: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

I can see there are several TUI-related files. Let me look at them to understand the structure:
- System/Agents/TUI/Event.hs
- System/Agents/TUI/Types.hs
- System/Agents/TUI/Core.hs
- System/Agents/TUI/Render.hs

Let me also search for "focusedSession" to understand how it's used.
</details>

### Response



### Tool Calls

- **bash_grep-files**

---

## Step 5: User Turn



---

## Step 6: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

No results. Let me search for "focused" instead.
</details>

### Response



### Tool Calls

- **bash_grep-files**

---

## Step 7: User Turn



---

## Step 8: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Interesting. It looks like "focusedSession" might be named differently in the code. Let me search for "current" or look at the TUI types file to understand the state structure.
</details>

### Response



### Tool Calls

- **bash_read-file**

---

## Step 9: User Turn



---

## Step 10: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

I see that there's a TUI state with a `sessionList` field. Let me look at the TUI Event module to see how the heartbeat event is handled and how the session list is managed.
</details>

### Response



### Tool Calls

- **bash_read-file**

---

## Step 11: User Turn



---

## Step 12: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Now I see the problem. In the `handleHeartbeat` function, the code is recreating the `conversationList` with all conversations from the core:

```haskell
handleHeartbeat :: EventM N TuiState ()
handleHeartbeat = do
    -- Refresh conversations from core
    coreRef <- use tuiCore
    coreState <- liftIO $ readTVarIO coreRef
    let convs = coreConversations coreState
    tuiUI . conversationList .= List.list ConversationListWidget (Vector.fromList convs) 1
    ...
```

This is resetting the `conversationList` with a new list that doesn't preserve the selected item! The `list` function creates a new list with no selection (or resets the selection). 

Let me check the `list` function from Brick to confirm this behavior. Based on my knowledge of Brick's API, `list` creates a new list with no selection (`listSelectedL` is `Nothing`).

The fix should be to preserve the currently selected item before updating the list and then restore it after. Let me also check if there's a similar issue with the session list.

Looking at the code again:
```haskell
tuiUI . conversationList .= List.list ConversationListWidget (Vector.fromList convs) 1
```

This replaces the entire list, including its selected index. The fix should preserve the selected index.

Let me also check the session list refresh logic:
```haskell
-- Note: handleHeartbeat doesn't update sessionList, but I should check if there's another place that does.
```

Looking at the code, I don't see a place where sessionList is updated during heartbeat. The session list is populated initially in `initUIState`.

The fix should be in `handleHeartbeat` - we need to preserve the current selection when refreshing the conversation list.


I can save the current selection before updating the list and restore it afterward, or use Brick's API to merge the new elements while preserving the existing selection. Let me examine the List module to see what options are available.
</details>

### Response

Now I can see the issue! In `handleHeartbeat`, the code recreates the conversation list with:

```haskell
tuiUI . conversationList .= List.list ConversationListWidget (Vector.fromList convs) 1
```

This replaces the entire list, which resets the selection (focused item). Let me also search for where the session list might be similarly affected:

### Tool Calls

- **bash_grep-files**

---

## Step 13: User Turn



---

## Step 14: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

The sessionList is only set in initUIState and doesn't appear to be refreshed during heartbeat. So the problem is specifically with the conversationList refresh.

Let me check Brick's List API to understand how to properly update the list elements while preserving selection:
</details>

### Response



### Tool Calls

- **bash_grep-files**

---

## Step 15: User Turn



---

## Step 16: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Good. The `listElements` function is used. Now let me look at what functions Brick.List provides. Based on the Brick API, I know that:1. `list` creates a new list without a selection
2. The list has a `listElementsL` lens to modify the elements
3. We can preserve the selection by using `listSelectedL` before and after the update

Let me write the fix. The issue is in `handleHeartbeat`:```haskellhandleHeartbeat :: EventM N TuiState ()
handleHeartbeat = do
    -- Refresh conversations from core
    coreRef <- use tuiCore
    coreState <- liftIO $ readTVarIO coreRef
    let convs = coreConversations coreState
    tuiUI . conversationList .= List.list ConversationListWidget (Vector.fromList convs) 1
```The fix should be:1. Get the currently selected index and conversation ID
2. Update the list elements
3. Try to restore the selection by finding the conversation with the same ID

Let me write the fix:
</details>

### Response

Let me check the Brick List module to understand the API better:

### Tool Calls

- **bash_grep-files**

---

## Step 17: User Turn



---

## Step 18: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Good, I can see that `List` is imported qualified. Now I need to write the fix. The solution is to:

1. Before updating the conversation list, save the currently selected conversation ID
2. After updating the list, find the index of that conversation in the new list and restore the selection

Let me write the fix to `handleHeartbeat`:
</details>

### Response

Now I understand the issue. The `handleHeartbeat` function recreates the conversation list using `List.list`, which resets the selection. The fix should preserve the currently selected conversation when refreshing the list.

### Tool Calls

- **bash_read-file**

---

## Step 19: User Turn



---

## Step 20: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Now I can see the exact issue. In `handleHeartbeat`, line 335:

```haskell
handleHeartbeat :: EventM N TuiState ()
handleHeartbeat = do
    -- Refresh conversations from core
    coreRef <- use tuiCore
    coreState <- liftIO $ readTVarIO coreRef
    let convs = coreConversations coreState
    tuiUI . conversationList .= List.list ConversationListWidget (Vector.fromList convs) 1
```

This recreates the list from scratch with no selection. The fix needs to:
1. Save the currently selected conversation ID before updating the list
2. After updating, try to find the same conversation in the new list and restore the selection

Let me write the fix:
</details>

### Response

Now I can see the issue. In `handleHeartbeat` (line 335), the code recreates the conversation list with `List.list`, which resets the selection. The fix should preserve the currently selected conversation ID and restore it after refreshing the list.

### Tool Calls

- **bash_write-file**

---

## Step 21: User Turn



---

## Step 22: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

Now let me compile the code to make sure it works:
</details>

### Response



### Tool Calls

- **bash_check-code**

---

## Step 23: User Turn



---

## Step 24: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

The code compiles successfully. There's only a warning about unused imports (Async, cancel) but that's just a pre-existing warning, not something I introduced.

Let me also run the tests to make sure everything is working:
</details>

### Response

The code compiles successfully. Let me also run the tests to ensure nothing is broken:

### Tool Calls

- **bash_check-code**

---

## Step 25: User Turn



---

## Step 26: LLM Turn

### Thinking Process

<details>
<summary>Click to expand reasoning</summary>

All tests pass. Let me summarize the fix:

The issue was that the `handleHeartbeat` function in `src/System/Agents/TUI/Event.hs` was recreating the conversation list from scratch using `List.list`, which resets the selection to `Nothing`. This caused the focused conversation to be lost every time the heartbeat fired.

The fix:
1. Before refreshing the conversation list, save the currently selected conversation ID using `getFocusedConversationId`
2. After creating the new list, find the index of the previously selected conversation in the new list
3. If found, restore the selection to that index using `listSelectedL`

This ensures that when the heartbeat refreshes the UI state, the user stays focused on the same conversation they were viewing.

Closes #119
</details>

### Response

Fix TUI focused session reset on heartbeat (#119)

The TUI's `handleHeartbeat` function was recreating the conversation list from scratch using `List.list`, which resets the selection to `Nothing`. This caused the focused conversation to be lost every time the heartbeat fired (periodically).

The fix preserves the currently selected conversation ID before refreshing the list and restores the selection afterward if the conversation still exists in the updated list.

Changes in `src/System/Agents/TUI/Event.hs`:
- Save the currently selected conversation ID before refreshing
- After creating the new list, find the index of the previously selected conversation
- Restore the selection to maintain focus on the same conversation

Closes #119
