Enh(viewer): multiselect in picker

Author: klieret

.cursor/rules/viewer.mdc

@@ -101,7 +101,7 @@ Here's how the metadata.json file looks like:
     "players": [
       {
         "agent": "mini",
-        "name": "gpt-5-mini-more-prescriptive",
+        "name": "sonnet-4-more-prescriptive",
         "config": {
           "agent": {
             "system_template": "",
@@ -145,12 +145,12 @@ Here's how the metadata.json file looks like:
   },
   "agents": [
     {
-      "name": "gpt-5-mini-more-prescriptive",
+      "name": "sonnet-4-more-prescriptive",
       "player_unique_id": "38f5a945-2a14-4cfb-9a41-e3ccceb7d3e2",
       "created_timestamp": 1757982729,
       "config": {
         "agent": "mini",
-        "name": "gpt-5-mini-more-prescriptive",
+        "name": "sonnet-4-more-prescriptive",
         "config": {
           "agent": {
             "system_template": "...,
@@ -164,7 +164,7 @@ Here's how the metadata.json file looks like:
         }
       },
       "initial_commit_hash": "dc7bdb934a2f1bba88d19136ff5caa6ff789dda7",
-      "branch_name": "PvpTournament.BattleSnake.250915203207.gpt-5-mini-more-prescriptive",
+      "branch_name": "PvpTournament.BattleSnake.250915203207.sonnet-4-more-prescriptive",
       "round_tags": {}
     },
     {
@@ -213,36 +213,53 @@ The application has two main pages:
 
 ### Mouse Navigation
 
-* **Left-click**: Default action (navigate in same tab)
-* **Middle-click**: Open in new tab (works on all buttons and game rows)
-* **Ctrl+click or Cmd+click**: Open in new tab (alternative to middle-click)
+* **Left-click in checkbox column**: Toggle checkbox selection
+* **Left-click elsewhere on game row**: Navigate to viewer in same tab
+* **Middle-click on game row**: Open in new tab
+* **Ctrl+click or Cmd+click on game row**: Open in new tab (alternative to middle-click)
+* **Drag over checkbox column**: Multi-select games by dragging over checkboxes
+* **Left-click on Open button**: Navigate to viewer in same tab
+* **Middle-click on Open button**: Open in new tab
+* **Ctrl+click or Cmd+click on Open button**: Open in new tab (alternative to middle-click)
+* **Left-click on ↗ button**: Always open in new tab
 
 ## Game Picker Design (`/picker`)
 
 ### Features
 
 * **Hierarchical Tree Structure**: Shows all folders recursively with proper indentation
 * **Game Detection**: Any folder containing `metadata.json` is considered a game folder
+* **Multi-Selection Support**: Checkboxes allow selecting multiple games for batch operations
+* **Batch Actions**: Action dropdown with options like "Copy pathnames" for selected games
+* **Readme Display**: Shows the first line of each game's `readme.txt` file in the table
 * **Folder Collapse/Expand**: Click intermediate folders to minimize/expand their contents
   - Collapsed folders show 📂 icon and blue accent border
   - Expanded folders show 📁 icon
   - Children of collapsed folders are hidden
 * **Visual Distinction**:
-  - Game folders: 🎮 icon, clickable, blue accent color
+  - Game folders: 🎮 icon, clickable for selection, blue accent color
   - Intermediate folders: 📁/📂 icon, clickable to collapse, muted appearance
 * **Tree Indentation**: Uses spaces and tree characters (└─) to show folder hierarchy
 * **Round Count Display**: Shows number of rounds for each game session
-* **Multiple Navigation Options**:
-  - Click game row: Navigate to viewer (middle-click for new tab)
+* **Model Display**: Shows full model names without truncation
+* **Selection Behavior**:
+  - Click in checkbox column: Toggle checkbox selection
+  - Drag over checkbox column: Multi-select games by dragging
+  - Click elsewhere on game row: Navigate to viewer (supports middle-click)
   - "Open" button: Navigate to viewer (supports middle-click)
   - "↗" button: Always open viewer in new tab
+* **Batch Operations**:
+  - "Select All" checkbox to toggle all games
+  - Styled action dropdown with custom arrow and hover effects for batch operations on selected games
+  - Copy pathnames copies selected game paths as space-separated string to clipboard
 
 ### Layout
 
-* Clean table structure with three columns: Game Session, Rounds, Action
-* Responsive design that adapts to mobile screens
+* Full-width table structure with six columns: Select, Game Session, Note, Rounds, Models, Action
+* Responsive design that adapts to mobile screens (hides some columns on mobile)
 * Hover effects and visual feedback
 * Base directory path display at the top
+* Control bar with selection controls and action dropdown
 
 ## Trajectory Viewer Design (`/`)
 

codeclash/viewer/app.py

@@ -86,6 +86,27 @@ def get_models_from_metadata(log_dir: Path) -> list[str]:
         return []
 
 
+def get_readme_first_line(log_dir: Path) -> str:
+    """Extract the first line from readme.txt if it exists"""
+    readme_file = log_dir / "readme.txt"
+    if not readme_file.exists():
+        return ""
+
+    try:
+        content = readme_file.read_text().strip()
+        if not content:
+            return ""
+        # Get the first non-empty line
+        lines = content.split("\n")
+        for line in lines:
+            line = line.strip()
+            if line:
+                return line
+        return ""
+    except (OSError, UnicodeDecodeError):
+        return ""
+
+
 def get_agent_info_from_metadata(metadata: dict[str, Any]) -> list[AgentInfo]:
     """Extract detailed agent information from metadata"""
     agents = []
@@ -160,13 +181,15 @@ def scan_directory(directory: Path, relative_path: str = ""):
                     if is_game_folder(item):
                         round_count = get_round_count_from_metadata(item)
                         models = get_models_from_metadata(item)
+                        readme_first_line = get_readme_first_line(item)
                         game_folders.add(current_relative)
                         all_folders.append(
                             {
                                 "name": current_relative,
                                 "full_path": str(item),
                                 "round_count": round_count,
                                 "models": models,
+                                "readme_first_line": readme_first_line,
                                 "is_game": True,
                                 "depth": depth,
                                 "parent": relative_path if relative_path else None,
@@ -180,6 +203,7 @@ def scan_directory(directory: Path, relative_path: str = ""):
                                 "full_path": str(item),
                                 "round_count": None,
                                 "models": [],
+                                "readme_first_line": "",
                                 "is_game": False,
                                 "depth": depth,
                                 "parent": relative_path if relative_path else None,

codeclash/viewer/static/css/picker.css

@@ -1,8 +1,9 @@
 /* Game Picker Styles */
 
 .picker-container {
-  max-width: 1400px;
-  margin: 2rem auto;
+  max-width: none;
+  width: 100%;
+  margin: 2rem 0;
   padding: 0 1rem;
 }
 
@@ -51,20 +52,74 @@
   overflow: hidden;
 }
 
+.table-controls {
+  background-color: var(--bg-tertiary);
+  padding: 1rem;
+  border-bottom: 1px solid var(--border-color);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 1rem;
+}
+
+.selection-controls {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.selection-controls input[type="checkbox"] {
+  margin: 0;
+}
+
+.selection-controls label {
+  font-weight: 500;
+  color: var(--text-primary);
+}
+
+.action-controls select {
+  padding: 0.5rem 1rem 0.5rem 0.8rem;
+  border: 2px solid var(--border-color);
+  border-radius: 0.5rem;
+  background-color: var(--bg-secondary);
+  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
+  background-repeat: no-repeat;
+  background-position: right 0.7rem center;
+  background-size: 1rem;
+  appearance: none;
+  color: var(--text-primary);
+  font-size: 0.9rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  min-width: 160px;
+}
+
+.action-controls select:hover {
+  border-color: var(--accent-color);
+  background-color: var(--bg-primary);
+}
+
+.action-controls select:focus {
+  outline: none;
+  border-color: var(--accent-color);
+  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
+}
+
 .table-header {
   background-color: var(--bg-tertiary);
   padding: 1rem;
   border-bottom: 1px solid var(--border-color);
   display: grid;
-  grid-template-columns: 1fr 100px 180px 140px;
+  grid-template-columns: 60px 2.5fr 3fr 100px 3fr 140px;
   gap: 1rem;
   font-weight: 600;
   color: var(--text-primary);
 }
 
 .game-row {
   display: grid;
-  grid-template-columns: 1fr 100px 180px 140px;
+  grid-template-columns: 60px 2.5fr 3fr 100px 3fr 140px;
   gap: 1rem;
   padding: 0.75rem 1rem;
   border-bottom: 1px solid var(--border-color);
@@ -110,6 +165,65 @@
   font-style: italic;
 }
 
+.checkbox-cell {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 60px;
+  user-select: none;
+  padding: 8px;
+}
+
+.checkbox-cell:hover {
+  background-color: var(--bg-primary);
+  border-radius: 0.25rem;
+}
+
+.checkbox-placeholder {
+  width: 16px;
+  height: 16px;
+}
+
+.game-checkbox {
+  width: 20px;
+  height: 20px;
+  cursor: pointer;
+  accent-color: var(--accent-color);
+  transform: scale(1.5);
+  transition: all 0.2s ease;
+}
+
+.game-checkbox:hover {
+  transform: scale(1.6);
+}
+
+.game-checkbox:focus {
+  outline: 2px solid var(--accent-color);
+  outline-offset: 2px;
+  border-radius: 2px;
+}
+
+.readme-cell {
+  display: flex;
+  align-items: center;
+  min-width: 0;
+  padding: 0.25rem;
+}
+
+.readme-text {
+  font-size: 0.8rem;
+  color: var(--text-primary);
+  word-wrap: break-word;
+  overflow-wrap: break-word;
+  line-height: 1.3;
+}
+
+.readme-empty {
+  color: var(--text-muted);
+  font-size: 0.8rem;
+  font-style: italic;
+}
+
 .game-name-cell {
   display: flex;
   align-items: center;
@@ -170,9 +284,9 @@
   align-items: center;
   justify-content: flex-start;
   gap: 0.25rem;
-  width: 180px;
   flex-wrap: wrap;
   padding: 0.25rem;
+  min-width: 0;
 }
 
 .model-tag {
@@ -183,9 +297,6 @@
   font-size: 0.7rem;
   font-weight: 500;
   white-space: nowrap;
-  max-width: 120px;
-  overflow: hidden;
-  text-overflow: ellipsis;
   flex-shrink: 0;
 }
 
@@ -196,10 +307,10 @@
 }
 
 .action-cell {
-  width: 140px;
   display: flex;
   justify-content: center;
   gap: 0.5rem;
+  min-width: 140px;
 }
 
 .open-button {
@@ -264,29 +375,38 @@
     padding: 0 0.5rem;
   }
 
+  .table-controls {
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.5rem;
+  }
+
   .table-header,
   .game-row {
-    grid-template-columns: 1fr 80px 120px;
+    grid-template-columns: 40px 1fr 80px;
     gap: 0.5rem;
   }
 
-  .rounds-cell {
-    width: 80px;
+  .checkbox-cell {
+    width: 40px;
   }
 
-  .models-cell {
-    width: 120px;
-    justify-content: flex-start;
+  .game-checkbox {
+    transform: scale(1.3);
   }
 
+  .game-checkbox:hover {
+    transform: scale(1.4);
+  }
+
+  .readme-cell,
+  .models-cell,
   .action-cell {
-    display: none; /* Hide action buttons on mobile, click row instead */
+    display: none; /* Hide on mobile to save space */
   }
 
-  .model-tag {
-    font-size: 0.6rem;
-    padding: 0.1rem 0.25rem;
-    max-width: 80px;
+  .rounds-cell {
+    width: 80px;
   }
 
   .game-name {