```                   # 📋 Session Report
    λλ              
   λ⊙λ⊙             
  λλλλλλ            
 λλλλλλλλ           
    λλ              
    λλ              
    λλ              
    λλ              
    λλ              
    λλ              
    λλ              
    λλ              
```                 

**🔑 Session ID:** 4537a46c-174b-4f0f-b6ad-bee123756a1c

---

## 📊 Statistics

### Turn Counts

| Metric | Value |
|--------|-------|
| Total Turns | 20 |
| 👤 User Turns | 10 |
| 🤖 LLM Turns | 10 |

### 🔧 Tool Calls

**Total Tool Calls:** 11

`bash_read-file      `    4 ████████████████████████████████████████████████████████████

`bash_write-file     `    4 ████████████████████████████████████████████████████████████

`bash_check-code     `    2 ██████████████████████████████

`bash_list-files     `    1 ███████████████


### 💾 Byte Usage

`Input     `    275 KiB ████████████████████████████████████████████████████████████

`Output    `      3 KiB 

`Reasoning `      2 KiB 
**Total:** 281 KiB


### 🎫 Token Usage

`Prompt      `    114,034 ████████████████████████████████████████████████████████████

`Completion  `     72,681 ███

`Cached      `    923,612 ████████████████████████████████████████████████
**Total:** 834,616

_(923,612 cached)_

---

## 👤 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.
You have access to a tool which is a copy of yourself named io_prompt_agent_oneshot, use it when a task is well-scoped in a way that it would save tokens in your context window and not interfere with your work.
```

### 💬 User Query

# TUI: Explicit message queue display in Core and UI

Depends-on: 
Base-branch: feature/tui-message-queue-display
Final: false

## Overview

Currently, the TUI queues messages when the LLM conversation is not waiting for user inputs. These messages are stored in `coreBufferedMessages :: TVar (Map ConversationId [Text])` but are not visible to the user until they are consumed.

This feature makes the message queue explicit by:
1. Exposing the buffered messages in the Core data type for UI access
2. Displaying the list of queued messages in the main Conversation text (above total usage counts)
3. Showing the number of queued messages in the Conversations list (next to turn count)

## Current Implementation

In `src/System/Agents/TUI/Types.hs`:
```haskell
data Core = Core
    { coreAgents :: [TuiAgent]
    , coreConversations :: [Conversation]
    , corePausedConversations :: Set ConversationId
    , coreBufferedMessages :: TVar (Map ConversationId [Text])  -- Hidden in TVar
    }
```

Messages are buffered via `addBufferedMessage` in `Event.hs` and consumed via `readAndClearBufferedMessages` when the agent needs input.

## Required Changes

### 1. Core Data Type (`src/System/Agents/TUI/Types.hs`)

Keep the existing `coreBufferedMessages` field but ensure it's properly exported and accessible. The `TVar (Map ConversationId [Text])` structure is correct for thread-safety.

No changes needed to Core, but verify the lens `coreBufferedMessages` is exported in `Core.hs`.

### 2. Rendering - Conversation List (`src/System/Agents/TUI/Render.hs`)

In `render_conversationItem`, add queued message count display:

```haskell
-- Around line 303, add to render_conversationItem:
let queueCount = getQueuedMessageCount st conv  -- Need to implement helper
    queueSuffix = if queueCount > 0 then " [" <> Text.pack (show queueCount) <> " queued]" else ""
    fullText = baseText <> turnSuffix <> queueSuffix
```

The helper needs to read from the Core's TVar:
```haskell
-- Add helper function in Render.hs
getQueuedMessageCount :: TuiState -> Conversation -> Int
getQueuedMessageCount st conv = 
    -- Read from coreBufferedMessages TVar via st ^. tuiCore
    -- Return length of messages for this conversationId
```

### 3. Rendering - Conversation View (`src/System/Agents/TUI/Render.hs`)

In `render_session`, display queued messages above the usage counts:

```haskell
-- Around line 414, modify render_session to include queued messages:
render_session :: Maybe Session -> Set ConversationId -> Widget N
render_session mSession ongoingConvs queuedMsgs =  -- Add queuedMsgs parameter
    vBox $
        [render_queued_messages queuedMsgs]  -- New: show queued messages
        ++ [render_session_usage session]
        ++ map render_turn ...
```

Add new render function:
```haskell
render_queued_messages :: [Text] -> Widget N
render_queued_messages [] = emptyWidget
render_queued_messages msgs = 
    withAttr queuedMessageAttr $  -- Define new attribute
        vBox $ [txt "Queued messages:"] 
               ++ map (\m -> txt $ "  ▶ " <> Text.take 50 m) msgs
               ++ [txt ""]
```

### 4. Render State Access (`src/System/Agents/TUI/Render.hs`)

Update `tui_appDraw` or provide a way to read Core state in render functions. The `TuiState` already contains `tuiCore :: TVar Core`, so we need to use `readTVarIO` in the render context.

Since `tui_appDraw :: TuiState -> [Widget N]` is pure, we have two options:

**Option A (Recommended):** Use `Brick.unsafeLookupViewport` pattern or accept that render can't access STM and pass buffered messages via TuiState.

**Option B:** Add a field to `UIState` that mirrors the buffered messages:
```haskell
-- In UIState:
, _uiBufferedMessages :: Map ConversationId [Text]

-- Update via heartbeat in Event.hs
```

I recommend **Option B** as it keeps rendering pure and follows the existing pattern of heartbeats updating UI state.

### 5. Event Handler Updates (`src/System/Agents/TUI/Event.hs`)

In `handleHeartbeat`, add:
```haskell
-- Read buffered messages from Core and update UIState
buffered <- liftIO $ readTVarIO (coreBufferedMessages core)
tuiUI . uiBufferedMessages .= buffered
```

## Data Types Reference

```haskell
-- From System.Agents.TUI.Types
data Core = Core
    { coreAgents :: [TuiAgent]
    , coreConversations :: [Conversation]
    , corePausedConversations :: Set ConversationId
    , coreBufferedMessages :: TVar (Map ConversationId [Text])
    }

data Conversation = Conversation
    { conversationId :: ConversationId
    , conversationAgent :: TuiAgent
    , conversationThreadId :: Maybe ThreadId
    , conversationSession :: Maybe Session
    , conversationName :: Text
    , conversationChan :: BChan (Maybe UserQuery)
    , conversationStatus :: ConversationStatus
    , conversationOnProgress :: OnSessionProgress
    }

newtype ConversationId = ConversationId UUID
    deriving (Show, Ord, Eq, FromJSON, ToJSON)

data TuiState = TuiState
    { _tuiCore :: TVar Core
    , _tuiUI :: UIState
    , _eventChan :: BChan AppEvent
    , _sessionConfig :: SessionConfig
    }
```

## Implementation Steps

1. **Add `uiBufferedMessages` field to `UIState`** in `Types.hs`
2. **Update `initUIState`** to initialize the new field with `Map.empty`
3. **Add lens** for `uiBufferedMessages` 
4. **Update `handleHeartbeat`** in `Event.hs` to sync buffered messages to UIState
5. **Add `render_queued_messages`** helper in `Render.hs`
6. **Update `render_conversationItem`** to show queue count
7. **Update `render_session`** to show queued messages above usage
8. **Add `queuedMessageAttr`** to the attribute map (suggest yellow color)

## UI Mockup

### Conversations List (sidebar)
```
┌─Conversations────────────┐
│  @assistant (3) [2 queued]│
│  @coder (5)              │
│ ● @reviewer (1) [1 queued]│
└──────────────────────────┘
```

### Conversation View (main panel)
```
┌─Conversation──────────────────────────┐
│ Queued messages:                      │
│   ▶ Can you also check the tests?     │
│   ▶ And update documentation          │
│                                       │
│ Session total: 1,234 tokens (3 turns) │
│ -----------------------               │
│ < Hello                               │
│ ...                                   │
└───────────────────────────────────────┘
```

## Testing Considerations

- Verify queued messages appear when sending messages during tool execution
- Verify queue count updates correctly in the conversation list
- Verify queued messages are cleared after being consumed by the agent
- Verify UI updates work correctly via heartbeat (may have 1-second delay)

---
From #431



### 🛠️ Available Tools

- **bash_grep-files** (`bash_grep-files`)
  - Description: Search for a pattern in files using 'git grep'
- **bash_read-file** (`bash_read-file`)
  - Description: Read the contents of a file
- **bash_check-code** (`bash_check-code`)
  - Description: Check Haskell code by compiling or testing
- **bash_list-files** (`bash_list-files`)
  - Description: List all files in the project
- **bash_write-file** (`bash_write-file`)
  - Description: Write content to a file. Optionally compiles or tests the code after writing. Use 'none' for the check action when making multiple edits that are not yet final, to avoid redundant compilation.
- **bash_run_agents_exe** (`bash_run_agents_exe`)
  - Description: Runs agents-exe with specified arguments. Useful for testing CLI commands like init, check, run, describe, and running repro cases when bug with specific command arise.
- **io_prompt_agent_oneshot** (`io_prompt_agent_oneshot`)
  - Description: asks a prompt to the expert agent: oneshot

---

## 🤖 Step 2: LLM Turn

### 💭 Thinking Process

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

The user wants me to implement a feature to display the message queue in the TUI (Terminal User Interface). Let me understand what needs to be done:

1. Add `uiBufferedMessages` field to `UIState` in `Types.hs`
2. Update `initUIState` to initialize the new field
3. Add lens for `uiBufferedMessages`
4. Update `handleHeartbeat` in `Event.hs` to sync buffered messages to UIState
5. Add `render_queued_messages` helper in `Render.hs`
6. Update `render_conversationItem` to show queue count
7. Update `render_session` to show queued messages above usage
8. Add `queuedMessageAttr` to the attribute map

Let me start by exploring the project structure and understanding the existing code.
</details>

### 💬 Response



### 🔧 Tool Calls

- **bash_list-files**

---

## 👤 Step 3: User Turn



---

## 🤖 Step 4: LLM Turn

### 💭 Thinking Process

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

Let me start by reading the TUI-related files to understand the current implementation:
1. `src/System/Agents/TUI/Types.hs` - Contains the data types
2. `src/System/Agents/TUI/Render.hs` - Contains rendering logic
3. `src/System/Agents/TUI/Event.hs` - Contains event handling

Let me read these files to understand the current structure.
</details>

### 💬 Response

Let me start by examining the TUI-related files to understand the current implementation.

### 🔧 Tool Calls

- **bash_read-file**

- **bash_read-file**

- **bash_read-file**

---

## 👤 Step 5: User Turn



---

## 🤖 Step 6: LLM Turn

### 💭 Thinking Process

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

Now I have a good understanding of the codebase. Let me summarize the required changes:

1. **Add `uiBufferedMessages` field to `UIState`** in `Types.hs` - This will store a copy of the buffered messages for UI access.

2. **Update `initUIState`** to initialize the new field with `Map.empty`.

3. **Add lens** for `uiBufferedMessages`.

4. **Update `handleHeartbeat`** in `Event.hs` to sync buffered messages to UIState.

5. **Add `render_queued_messages`** helper in `Render.hs`.

6. **Update `render_conversationItem`** to show queue count.

7. **Update `render_session`** to show queued messages above usage.

8. **Add `queuedMessageAttr`** to the attribute map (suggest yellow color).

Let me implement these changes step by step.
</details>

### 💬 Response

Now I have a good understanding of the codebase. Let me implement the required changes step by step.

### 🔧 Tool Calls

- **bash_write-file**

---

## 👤 Step 7: User Turn



---

## 🤖 Step 8: LLM Turn

### 💭 Thinking Process

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

Good. Now let me update Event.hs to sync buffered messages to UIState in handleHeartbeat.
</details>

### 💬 Response

Now let me update the Event.hs to sync buffered messages to UIState in `handleHeartbeat`:

### 🔧 Tool Calls

- **bash_write-file**

---

## 👤 Step 9: User Turn



---

## 🤖 Step 10: LLM Turn

### 💭 Thinking Process

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

Now let me update the Render.hs to add the rendering of queued messages. I need to:

1. Add `queuedMessageAttr` attribute
2. Add `render_queued_messages` function
3. Update `render_conversationItem` to show queue count
4. Update `render_session` to show queued messages
5. Add the attribute to `tui_appAttrMap`

Let me update the Render.hs file.
</details>

### 💬 Response

Now let me update Render.hs to add the rendering of queued messages:

### 🔧 Tool Calls

- **bash_write-file**

---

## 👤 Step 11: User Turn



---

## 🤖 Step 12: LLM Turn

### 💭 Thinking Process

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

Now let me check if the code compiles correctly by running the compilation.
</details>

### 💬 Response

Now let me compile the code to verify everything works:

### 🔧 Tool Calls

- **bash_check-code**

---

## 👤 Step 13: User Turn



---

## 🤖 Step 14: LLM Turn

### 💭 Thinking Process

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

There's an unused import warning. Let me fix it by removing the unused import.
</details>

### 💬 Response

I need to fix the unused import warning. Let me remove the redundant import:

### 🔧 Tool Calls

- **bash_read-file**

---

## 👤 Step 15: User Turn



---

## 🤖 Step 16: LLM Turn

### 💭 Thinking Process

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

I need to remove the unused `Data.Map.Strict (Map)` import. The qualified import `qualified Data.Map.Strict as Map` is still needed since we use `Map.lookup` in the code.
</details>

### 💬 Response



### 🔧 Tool Calls

- **bash_write-file**

---

## 👤 Step 17: User Turn



---

## 🤖 Step 18: LLM Turn

### 💭 Thinking Process

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

The code compiles successfully. Now let me run the tests to make sure everything works correctly.
</details>

### 💬 Response

The code compiles successfully. Let me run the tests to verify everything works:

### 🔧 Tool Calls

- **bash_check-code**

---

## 👤 Step 19: User Turn



---

## 🤖 Step 20: LLM Turn

### 💭 Thinking Process

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

All 599 tests pass. The implementation is complete. Let me summarize what I've done.
</details>

### 💬 Response

All 599 tests pass. Let me provide a summary of the implementation:

## Summary

I have successfully implemented the explicit message queue display feature for the TUI. Here are the changes made:

### 1. `src/System/Agents/TUI/Types.hs`
- Added `_uiBufferedMessages :: Map ConversationId [Text]` field to `UIState` to store a copy of buffered messages for UI rendering
- Updated `initUIState` to initialize the new field with `Map.empty`
- The `makeLenses ''UIState` generates the `uiBufferedMessages` lens automatically

### 2. `src/System/Agents/TUI/Event.hs`
- Added import for `uiBufferedMessages` lens
- Updated `handleHeartbeat` to sync buffered messages from Core to UIState:
  ```haskell
  -- Sync buffered messages from Core to UIState for rendering
  buffered <- liftIO $ readTVarIO (coreBufferedMessages coreState)
  tuiUI . uiBufferedMessages .= buffered
  ```

### 3. `src/System/Agents/TUI/Render.hs`
- Added `queuedMessageAttr` for styling queued messages (yellow color)
- Added `getQueuedMessageCount` helper function to get the count of queued messages for a conversation
- Updated `render_conversationItem` to display the queue count next to the turn count in the conversation list:
  ```
  @assistant (3) [2 queued]
  ```
- Added `getQueuedMessages` helper function to get the list of queued messages
- Updated `render_conversationView` to pass queued messages to `render_session`
- Updated `render_session` signature to accept queued messages and display them
- Added `render_queued_messages` function to render queued messages with a "Queued messages:" header and a ▶ prefix for each message (truncated to 60 chars)
- Added `queuedMessageAttr` to the attribute map with yellow foreground color

### UI Mockup (as implemented)

**Conversations List (sidebar):**
```
┌─Conversations───────────────┐
│  @assistant (3) [2 queued]  │
│  @coder (5)                 │
│ ● @reviewer (1) [1 queued]  │
└─────────────────────────────┘
```

**Conversation View (main panel):**
```
┌─Conversation──────────────────────────────┐
│ Queued messages:                          │
│   ▶ Can you also check the tests?         │
│   ▶ And update documentation              │
│                                           │
│ Session total: 1,234 tokens (3 turns)     │
│ -----------------------                   │
│ < Hello                                   │
│ ...                                       │
└───────────────────────────────────────────┘
```

The implementation follows the recommended Option B from the specification, keeping rendering pure by syncing buffered messages to UIState via the heartbeat mechanism.
