diff --git a/loop/webui/src/web-components/demo/demo.css b/loop/webui/src/web-components/demo/demo.css
new file mode 100644
index 0000000..bb9750e
--- /dev/null
+++ b/loop/webui/src/web-components/demo/demo.css
@@ -0,0 +1,9 @@
+body {
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
+    Roboto, sans-serif;
+  margin: 0;
+  padding: 20px;
+  padding-bottom: 100px; /* Adjusted padding for chat container */
+  color: #333;
+  line-height: 1.4; /* Reduced line height for more compact text */
+}
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/index.html b/loop/webui/src/web-components/demo/index.html
new file mode 100644
index 0000000..3f728c0
--- /dev/null
+++ b/loop/webui/src/web-components/demo/index.html
@@ -0,0 +1,28 @@
+<html>
+  <head>
+    <link rel="stylesheet" href="demo.css" />
+  </head>
+  <body>
+    sketch web-components demo index
+    <ul>
+      <li><a href="sketch-app-shell.demo.html">sketch-app-shell</a></li>
+      <li><a href="sketch-charts.demo.html">sketch-charts</a></li>
+      <li><a href="sketch-chat-input.demo.html">sketch-chat-input</a></li>
+      <li><a href="sketch-diff-view.demo.html">sketch-diff-view</a></li>
+      <li>
+        <a href="sketch-container-status.demo.html">sketch-container-status</a>
+      </li>
+      <li>
+        <a href="sketch-network-status.demo.html">sketch-network-status</a>
+      </li>
+      <li>
+        <a href="sketch-timeline-message.demo.html">sketch-timeline-message</a>
+      </li>
+      <li><a href="sketch-timeline.demo.html">sketch-timeline</a></li>
+      <li><a href="sketch-tool-calls.demo.html">sketch-tool-calls</a></li>
+      <li>
+        <a href="sketch-view-mode-select.demo.html">sketch-view-mode-select</a>
+      </li>
+    </ul>
+  </body>
+</html>
diff --git a/loop/webui/src/web-components/demo/readme.md b/loop/webui/src/web-components/demo/readme.md
new file mode 100644
index 0000000..8e3c33c
--- /dev/null
+++ b/loop/webui/src/web-components/demo/readme.md
@@ -0,0 +1,14 @@
+# Stand-alone demo pages for sketch web components
+
+These are handy for iterating on specific component UI issues in isolation from the rest of the sketch application, and without having to start a full backend to serve the full frontend app UI.
+
+# How to use this demo directory to iterate on component development
+
+From the `loop/webui` directory:
+
+1. In one shell, run `npm run watch` to build the web components and watch for changes
+1. In another shell, run `npm run demo` to start a local web server to serve the demo pages
+1. open http://localhost:8000/src/web-components/demo/ in your browser
+1. make edits to the .ts code or to the demo.html files and see how it affects the demo pages in real time
+
+Alternately, use the `webui: watch demo` task in VSCode, which runs all of the above for you.
diff --git a/loop/webui/src/web-components/demo/sketch-app-shell.demo.html b/loop/webui/src/web-components/demo/sketch-app-shell.demo.html
new file mode 100644
index 0000000..092ad7c
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-app-shell.demo.html
@@ -0,0 +1,13 @@
+<html>
+  <head>
+    <title>sketch-app-shell demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script src="/dist/web-components/sketch-app-shell.js" type="module"></script>
+  </head>
+  <body>
+    <h1>sketch-app-shell demo</h1>
+
+    <sketch-app-shell></sketch-app-shell>
+
+  </body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-charts.demo.html b/loop/webui/src/web-components/demo/sketch-charts.demo.html
new file mode 100644
index 0000000..b525785
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-charts.demo.html
@@ -0,0 +1,129 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Sketch Charts Demo</title>
+    <script type="module" src="/dist/web-components/sketch-charts.js"></script>
+    <link rel="stylesheet" href="demo.css" />
+    <style>
+      sketch-charts {
+        margin: 20px;
+        max-width: 1000px;
+      }
+
+      body {
+        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
+          Roboto, sans-serif;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>Sketch Charts Demo</h1>
+    <sketch-charts id="charts"></sketch-charts>
+
+    <script>
+      // Sample data for testing
+      const sampleMessages = [
+        {
+          idx: 1,
+          type: "human",
+          content: "Hello, can you help me with a coding task?",
+          timestamp: new Date(Date.now() - 3600000).toISOString(),
+          usage: { cost_usd: 0.0001 },
+        },
+        {
+          idx: 2,
+          type: "assistant",
+          content:
+            "I'd be happy to help! What kind of coding task are you working on?",
+          timestamp: new Date(Date.now() - 3500000).toISOString(),
+          usage: { cost_usd: 0.0005 },
+        },
+        {
+          idx: 3,
+          type: "human",
+          content: "I need to create a web component using lit-element",
+          timestamp: new Date(Date.now() - 3400000).toISOString(),
+          usage: { cost_usd: 0.0001 },
+        },
+        {
+          idx: 4,
+          type: "assistant",
+          content:
+            "I can definitely help with that. Lit Element is a great library for building web components.",
+          timestamp: new Date(Date.now() - 3300000).toISOString(),
+          usage: { cost_usd: 0.0008 },
+        },
+        {
+          idx: 5,
+          type: "assistant",
+          tool_name: "bash",
+          input: "ls -la",
+          tool_result:
+            "total 16\ndrwxr-xr-x  4 user  staff  128 Jan 10 12:34 .\ndrwxr-xr-x 10 user  staff  320 Jan 10 12:34 ..\n-rw-r--r--  1 user  staff  123 Jan 10 12:34 file1.txt\n-rw-r--r--  1 user  staff  456 Jan 10 12:34 file2.txt",
+          start_time: new Date(Date.now() - 3200000).toISOString(),
+          end_time: new Date(Date.now() - 3190000).toISOString(),
+          timestamp: new Date(Date.now() - 3190000).toISOString(),
+          usage: { cost_usd: 0.0002 },
+        },
+        {
+          idx: 6,
+          type: "assistant",
+          content: "Let me create a basic web component for you.",
+          timestamp: new Date(Date.now() - 3100000).toISOString(),
+          usage: { cost_usd: 0.0015 },
+        },
+        {
+          idx: 7,
+          type: "human",
+          content: "Can you show me how to handle events in the web component?",
+          timestamp: new Date(Date.now() - 3000000).toISOString(),
+          usage: { cost_usd: 0.0001 },
+        },
+        {
+          idx: 8,
+          type: "assistant",
+          tool_name: "bash",
+          input: "cat example.ts",
+          tool_result:
+            "import { LitElement, html } from 'lit';\nimport { customElement } from 'lit/decorators.js';\n\n@customElement('my-element')\nexport class MyElement extends LitElement {\n  render() {\n    return html`<div>Hello World</div>`;\n  }\n}",
+          start_time: new Date(Date.now() - 2900000).toISOString(),
+          end_time: new Date(Date.now() - 2800000).toISOString(),
+          timestamp: new Date(Date.now() - 2800000).toISOString(),
+          usage: { cost_usd: 0.0003 },
+        },
+        {
+          idx: 9,
+          type: "assistant",
+          content:
+            "Here's how you can handle events in a web component using Lit.",
+          timestamp: new Date(Date.now() - 2700000).toISOString(),
+          usage: { cost_usd: 0.002 },
+        },
+        {
+          idx: 10,
+          type: "human",
+          content: "Thank you! How about adding properties and attributes?",
+          timestamp: new Date(Date.now() - 2600000).toISOString(),
+          usage: { cost_usd: 0.0001 },
+        },
+        {
+          idx: 11,
+          type: "assistant",
+          content:
+            "You can use the @property decorator to define properties in your Lit Element component.",
+          timestamp: new Date(Date.now() - 2500000).toISOString(),
+          usage: { cost_usd: 0.0025 },
+        },
+      ];
+
+      // Set sample data as soon as the component is defined
+      document.addEventListener("DOMContentLoaded", () => {
+        console.time("chart-demo-load");
+        const chartsComponent = document.getElementById("charts");
+        chartsComponent.messages = sampleMessages;
+        console.timeEnd("chart-demo-load");
+      });
+    </script>
+  </body>
+</html>
diff --git a/loop/webui/src/web-components/demo/sketch-chat-input.demo.html b/loop/webui/src/web-components/demo/sketch-chat-input.demo.html
new file mode 100644
index 0000000..4806035
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-chat-input.demo.html
@@ -0,0 +1,32 @@
+<html>
+  <head>
+    <title>sketch-chat-input demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script src="/dist/web-components/sketch-chat-input.js" type="module"></script>
+
+    <script>
+      document.addEventListener("DOMContentLoaded", () => {
+        const chatInput = document.querySelector('sketch-chat-input');
+        console.log("chatInput: ", chatInput);
+        chatInput.content = "hi";
+        chatInput.addEventListener("send-chat", (evt) => {
+          console.log('send chat event: ', evt);
+          const msgDiv = document.querySelector("#chat-messages");
+          const newDiv = document.createElement("div");
+          newDiv.innerText = evt.detail.message; 
+          msgDiv.append(newDiv);
+          chatInput.content = '';
+        });
+      });
+    </script>
+
+  </head>
+  <body>
+    <h1>sketch-chat-input demo</h1>
+
+    <div id="chat-messages"></div>
+
+    <sketch-chat-input></sketch-chat-input>
+
+  </body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-container-status.demo.html b/loop/webui/src/web-components/demo/sketch-container-status.demo.html
new file mode 100644
index 0000000..bd2544d
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-container-status.demo.html
@@ -0,0 +1,40 @@
+<html>
+  <head>
+    <title>sketch-container-status demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script src="/dist/web-components/sketch-container-status.js" type="module"></script>
+
+    <script>
+      document.addEventListener("DOMContentLoaded", () => {
+        const containerStatus = document.querySelector('#status-2');
+        containerStatus.state = {
+          hostname: 'example.hostname',
+          initial_commit: 'decafbad',
+          message_count: 27,
+          os: 'linux',
+          total_usage: {
+            start_time: 'around lunch',
+            messages:1337,
+            input_tokens: 3,
+            output_tokens: 1000,
+            cache_read_input_tokens: 28,
+            cache_creation_input_tokens: 12354,
+            total_cost_usd: 2.03,
+          }, 
+          working_dir: '/app',
+        };
+      });
+    </script>
+
+  </head>
+  <body>
+    <h1>sketch-container-status demo</h1>
+
+    Empty:
+    <sketch-container-status id="status-1"></sketch-container-status>
+
+    With state fields set:
+    <sketch-container-status id="status-2"></sketch-container-status>
+
+  </body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-diff-view.demo.html b/loop/webui/src/web-components/demo/sketch-diff-view.demo.html
new file mode 100644
index 0000000..63b5395
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-diff-view.demo.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Sketch Diff Viewer Demo</title>
+  <link rel="stylesheet" href="../../../node_modules/diff2html/bundles/css/diff2html.min.css">
+  <script type="module" src="/dist/web-components/sketch-diff-view.js"></script>
+  <style>
+    body {
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+      max-width: 1200px;
+      margin: 0 auto;
+      padding: 2rem;
+    }
+    
+    h1 {
+      color: #333;
+      margin-bottom: 2rem;
+    }
+    
+    .control-panel {
+      margin-bottom: 2rem;
+      padding: 1rem;
+      background-color: #f0f0f0;
+      border-radius: 4px;
+    }
+    
+    input {
+      padding: 0.5rem;
+      border-radius: 4px;
+      border: 1px solid #ccc;
+      width: 300px;
+    }
+    
+    button {
+      padding: 0.5rem 1rem;
+      background-color: #2196f3;
+      color: white;
+      border: none;
+      border-radius: 4px;
+      cursor: pointer;
+      margin-left: 1rem;
+    }
+    
+    button:hover {
+      background-color: #0d8bf2;
+    }
+  </style>
+
+<script>
+  document.addEventListener('DOMContentLoaded', () => {
+    const diffViewer = document.getElementById('diffViewer');
+    const commitHashInput = document.getElementById('commitHash');
+    const viewDiffButton = document.getElementById('viewDiff');
+    let commit = false;
+    viewDiffButton.addEventListener('click', () => {
+      let diffContent = `diff --git a/sample.txt b/sample.txt
+index 1111111..2222222 100644
+--- a/sample.txt
++++ b/sample.txt
+@@ -1,5 +1,5 @@
+ This is a sample file
+-This line will be removed
++This line is added as a replacement
+ This line stays the same
+-Another line to remove
++A completely new line
+ The last line is unchanged`;
+       if (commit) {
+            // For demo purposes, generate fake diff based on commit hash
+            diffContent = `diff --git a/file-${commit.substring(0,5)}.txt b/file-${commit.substring(0,5)}.txt
+index 3333333..4444444 100644
+--- a/file-${commit.substring(0,5)}.txt
++++ b/file-${commit.substring(0,5)}.txt
+@@ -1,4 +1,6 @@
+ File with commit: ${commit}
++This line was added in commit ${commit}
+ This line exists in both versions
+-This line was removed in commit ${commit}
++This line replaced the removed line
++Another new line added in this commit
+ Last line of the file`;
+          }
+      diffViewer.diffText = diffContent;
+      diffViewer.commitHash = commitHashInput.value.trim();
+    });
+  });
+</script>
+
+</head>
+<body>
+  <h1>Sketch Diff Viewer Demo</h1>
+  
+  <div class="control-panel">
+    <label for="commitHash">Commit Hash (leave empty for unstaged changes):</label>
+    <input type="text" id="commitHash" placeholder="Enter commit hash">
+    <button id="viewDiff">View Diff</button>
+  </div>
+  
+  <sketch-diff-view id="diffViewer"></sketch-diff-view>
+  
+</body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-network-status.demo.html b/loop/webui/src/web-components/demo/sketch-network-status.demo.html
new file mode 100644
index 0000000..9926b0e
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-network-status.demo.html
@@ -0,0 +1,17 @@
+<html>
+  <head>
+    <title>sketch-network-status demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script src="/dist/web-components/sketch-network-status.js" type="module"></script>
+  </head>
+  <body>
+    <h1>sketch-network-status demo</h1>
+
+    Connected:
+    <sketch-network-status connection="connected" message="connected"></sketch-network-status>
+
+    Error:
+    <sketch-network-status connection="error" error="error"></sketch-network-status>
+
+  </body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-timeline-message.demo.html b/loop/webui/src/web-components/demo/sketch-timeline-message.demo.html
new file mode 100644
index 0000000..466f910
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-timeline-message.demo.html
@@ -0,0 +1,66 @@
+<html>
+  <head>
+    <title>sketch-timeline-message demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script
+      src="/dist/web-components/sketch-timeline-message.js"
+      type="module"
+    ></script>
+
+    <script>
+      const messages = [
+        {
+          type: "agent",
+          content: "an agent message",
+        },
+        {
+          type: "user",
+          content: "a user message",
+        },
+        {
+          type: "tool",
+          content: "a tool use message",
+        },
+        {
+          type: "commit",
+          end_of_turn: false,
+          content: "",
+          commits: [
+            {
+              hash: "ece101c103ec231da87f4df05c1b5e6a24e13add",
+              subject: "Add README.md for web components directory",
+              body: "This adds documentation for the web components used in the Loop UI,\nincluding a description of each component, usage examples, and\ndevelopment guidelines.\n\nCo-Authored-By: sketch\nadd README.md for loop/webui/src/web-components",
+              pushed_branch:
+                "sketch/create-readmemd-for-web-components-directory",
+            },
+          ],
+          timestamp: "2025-04-14T16:39:33.639533919Z",
+          conversation_id: "",
+          idx: 17,
+        },
+        {
+          type: "agent",
+          content: "an end-of-turn agent message",
+          end_of_turn: true,
+        },
+      ];
+      document.addEventListener("DOMContentLoaded", () => {
+        messages.forEach((msg, idx) => {
+          const jsonEl = document.createElement("pre");
+          jsonEl.innerText = `.message property: ${JSON.stringify(msg)}`;
+          document.body.append(jsonEl);
+          const messageEl = document.createElement("sketch-timeline-message");
+          messageEl.message = msg;
+          document.body.appendChild(messageEl);
+        });
+        window.addEventListener(
+          "show-commit-diff",
+          (evt) => {console.log("show-commit-diff", evt)}
+        );
+      });
+    </script>
+  </head>
+  <body>
+    <h1>sketch-timeline-message demo</h1>
+  </body>
+</html>
diff --git a/loop/webui/src/web-components/demo/sketch-timeline.demo.html b/loop/webui/src/web-components/demo/sketch-timeline.demo.html
new file mode 100644
index 0000000..427181d
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-timeline.demo.html
@@ -0,0 +1,47 @@
+<html>
+  <head>
+    <title>sketch-timeline demo</title>
+    <link rel="stylesheet" href="demo.css" />
+    <script src="/dist/web-components/sketch-timeline.js" type="module"></script>
+
+    <script>
+      const messages = [
+        {
+          type: "user",
+          content: "a user message",
+        },
+        {
+          type: "agent",
+          content: "an agent message",
+        },
+        {
+          type: "agent",
+          content: "an agent message",
+        },
+        {
+          type: "agent",
+          content: "an agent message",
+        },
+        {
+          type: "user",
+          content: "a user message",
+        },
+        {
+          type: "user",
+          content: "a user message",
+        },
+      ];
+      document.addEventListener("DOMContentLoaded", () => {
+        const timelineEl = document.querySelector('sketch-timeline');
+        timelineEl.messages = messages;
+      });
+    </script>
+
+  </head>
+  <body>
+    <h1>sketch-timeline demo</h1>
+
+    <sketch-timeline></sketch-timeline>
+
+  </body>
+</html>
\ No newline at end of file
diff --git a/loop/webui/src/web-components/demo/sketch-tool-calls.demo.html b/loop/webui/src/web-components/demo/sketch-tool-calls.demo.html
new file mode 100644
index 0000000..a72babc
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-tool-calls.demo.html
@@ -0,0 +1,190 @@
+<html>
+  <head>
+    <title>sketch-tool-calls demo</title>
+    <link rel="stylesheet" href="demo.css" />
+
+    <script
+      src="/dist/web-components/sketch-tool-calls.js"
+      type="module"
+    ></script>
+
+    <script>
+      const toolCalls = [
+        [
+          {
+            name: "bash",
+            input: JSON.stringify({
+              command: "ls -a",
+            }),
+          },
+        ],
+        [
+          {
+            name: "bash",
+            input: JSON.stringify({
+              command: "ls -a",
+            }),
+            result_message: {
+              type: "tool",
+              tool_result: ".\n..",
+            },
+          },
+        ],
+        [
+          {
+            name: "bash",
+            input: JSON.stringify({
+              command: "sleep 200",
+            }),
+            result_message: {
+              type: "tool",
+              tool_error: "the user canceled this operation",
+            },
+          },
+        ],
+        [
+          {
+            name: "title",
+            input: JSON.stringify({
+              title: "a new title for this sketch",
+            }),
+          },
+        ],
+        [
+          {
+            name: "codereview",
+            input: "{}",
+            tool_call_id: "toolu_01WT5qQwHZgdogfKhkD8R9PZ",
+            result_message: {
+              type: "tool",
+              end_of_turn: false,
+              content: "",
+              tool_name: "codereview",
+              input: "{}",
+              tool_result: "OK",
+              tool_call_id: "toolu_01WT5qQwHZgdogfKhkD8R9PZ",
+              timestamp: "2025-04-14T16:33:17.575759565Z",
+              conversation_id: "xsa-8hw0",
+              start_time: "2025-04-14T16:33:07.11793816Z",
+              end_time: "2025-04-14T16:33:17.57575719Z",
+              elapsed: 10457819031,
+              idx: 45,
+            },
+          },
+        ],
+        [
+          {
+            name: "codereview",
+            input: "{}",
+            tool_call_id: "toolu_01WT5qQwHZgdogfKhkD8R9PZ",
+            result_message: {
+              type: "tool",
+              end_of_turn: false,
+              content: "",
+              tool_name: "codereview",
+              input: "{}",
+              tool_result: "Not OK",
+              tool_call_id: "toolu_01WT5qQwHZgdogfKhkD8R9PZ",
+              timestamp: "2025-04-14T16:33:17.575759565Z",
+              conversation_id: "xsa-8hw0",
+              start_time: "2025-04-14T16:33:07.11793816Z",
+              end_time: "2025-04-14T16:33:17.57575719Z",
+              elapsed: 10457819031,
+              idx: 45,
+            },
+          },
+        ],
+        [
+          {
+            name: "think",
+            input:
+              '{"thoughts":"I\'m going to inspect a few key components to understand their purpose and relationships:\\n1. sketch-app-shell.ts - Appears to be the main container component\\n2. sketch-timeline.ts - Likely manages the chat timeline\\n3. sketch-view-mode-select.ts - Handles switching between different views\\n\\nThis will help me create a comprehensive README that explains the components and their relationships."}',
+            tool_call_id: "toolu_01R1g5mQVgKxEJZFNp9QGvUr",
+            result_message: {
+              type: "tool",
+              end_of_turn: false,
+              content: "",
+              tool_name: "think",
+              input:
+                '{"thoughts":"I\'m going to inspect a few key components to understand their purpose and relationships:\\n1. sketch-app-shell.ts - Appears to be the main container component\\n2. sketch-timeline.ts - Likely manages the chat timeline\\n3. sketch-view-mode-select.ts - Handles switching between different views\\n\\nThis will help me create a comprehensive README that explains the components and their relationships."}',
+              tool_result: "recorded",
+              tool_call_id: "toolu_01R1g5mQVgKxEJZFNp9QGvUr",
+              timestamp: "2025-04-14T16:32:14.12647133Z",
+              conversation_id: "xsa-8hw0",
+              start_time: "2025-04-14T16:32:14.126454329Z",
+              end_time: "2025-04-14T16:32:14.126468539Z",
+              elapsed: 14209,
+              idx: 18,
+            },
+          },
+        ],
+        [
+          {
+            name: "patch",
+            input:
+              '{"path":"/app/loop/webui/src/web-components/README.md","patches":[{"operation":"overwrite","newText":"# Web Components\\n\\nThis directory contains the custom web components used in the Loop WebUI. These components are built using the [Lit](https://lit.dev/) library for creating fast, lightweight web components with a declarative template system.\\n\\n## Component Architecture\\n\\nThe components follow a hierarchical structure that creates a complete UI for interacting with the CodingAgent:\\n\\n```\\nsketch-app-shell (main container)\\n├── sketch-container-status\\n├── sketch-network-status\\n├── sketch-view-mode-select\\n├── sketch-timeline (chat view)\\n│   └── sketch-timeline-message\\n│       └── sketch-tool-calls\\n├── sketch-diff-view (code diff view)\\n└── sketch-chat-input\\n```\\n\\n## Component Overview\\n\\n### sketch-app-shell.ts\\nThe main container component that orchestrates the entire UI. It manages:\\n- View modes (chat, diff, charts, terminal)\\n- Network status and connection management\\n- Timeline data fetching and rendering\\n- Auto-scrolling behavior for chat messages\\n\\n### sketch-chat-input.ts\\nHandles user input for sending messages to the CodingAgent:\\n- Text input area with markdown support\\n- Send button and keyboard shortcuts (Enter to send, Shift+Enter for newline)\\n- Auto-focusing behavior\\n\\n### sketch-container-status.ts\\nDisplays information about the container environment:\\n- OS information\\n- Resource usage (CPU, memory)\\n- Container status indicators\\n\\n### sketch-diff-view.ts\\nProvides a visual diff viewer for code changes:\\n- Git commit display\\n- Side-by-side or unified diff viewing\\n- Syntax highlighting for code\\n- Comment creation for code review\\n\\n### sketch-network-status.ts\\nShows the current connection status to the server:\\n- Connected/disconnected indicators\\n- Error messages when connection issues occur\\n- Visual feedback on connection state\\n\\n### sketch-timeline.ts\\nDisplays the conversation history between user and CodingAgent:\\n- Message rendering\\n- Manages the sequence of messages\\n- Handles scrolling behavior\\n\\n### sketch-timeline-message.ts\\nRenders individual messages in the timeline:\\n- Different styling for user vs. agent messages\\n- Markdown rendering with syntax highlighting\\n- Handles special message types\\n\\n### sketch-tool-calls.ts\\nDisplays tool call information within messages:\\n- Tool call parameters and outputs\\n- Expandable/collapsible sections for tool details\\n- Syntax highlighting for code in tool outputs\\n\\n### sketch-view-mode-select.ts\\nProvides UI for switching between different views:\\n- Chat view for conversation\\n- Diff view for code changes\\n- Charts view for data visualization\\n- Terminal view for command execution\\n\\n## Development\\n\\n### Creating New Components\\n\\nWhen creating new components, follow these patterns:\\n\\n1. Use the `@customElement` decorator to define the component\\n2. Encapsulate styles using the static `styles` property\\n3. Use Lit\'s reactive properties (`@property`, `@state`) to manage component state\\n4. Implement lifecycle methods as needed (`connectedCallback`, `disconnectedCallback`, etc.)\\n\\n### Example\\n\\n```typescript\\nimport { css, html, LitElement } from \'lit\';\\nimport { customElement, property } from \'lit/decorators.js\';\\n\\n@customElement(\'sketch-new-component\')\\nexport class SketchNewComponent extends LitElement {\\n  @property()\\n  myProperty: string = \'default\';\\n\\n  static styles = css`\\n    :host {\\n      display: block;\\n    }\\n  `;\\n\\n  render() {\\n    return html`\\n      <div>\\n        ${this.myProperty}\\n      </div>\\n    `;\\n  }\\n}\\n\\ndeclare global {\\n  interface HTMLElementTagNameMap {\\n    \'sketch-new-component\': SketchNewComponent;\\n  }\\n}\\n```\\n\\n### Best Practices\\n\\n1. Maintain a single responsibility for each component\\n2. Use properties and events for parent-child communication\\n3. Document the purpose and API of each component\\n4. Write tests for components where possible\\n5. Keep styles encapsulated within components\\n6. Use type definitions for strong typing\\n\\n## Related Resources\\n\\n- [Lit Documentation](https://lit.dev/docs/)\\n- [Web Components Introduction](https://developer.mozilla.org/en-US/docs/Web/Web_Components)\\n- See `/app/loop/webui/readme.md` for more information on the Loop WebUI project\\n"}]}',
+            tool_call_id: "toolu_01TNhLX2AWkZwsu2KCLKrpju",
+            result_message: {
+              type: "tool",
+              end_of_turn: false,
+              content: "",
+              tool_name: "patch",
+              input:
+                '{"path":"/app/loop/webui/src/web-components/README.md","patches":[{"operation":"overwrite","newText":"# Web Components\\n\\nThis directory contains the custom web components used in the Loop WebUI. These components are built using the [Lit](https://lit.dev/) library for creating fast, lightweight web components with a declarative template system.\\n\\n## Component Architecture\\n\\nThe components follow a hierarchical structure that creates a complete UI for interacting with the CodingAgent:\\n\\n```\\nsketch-app-shell (main container)\\n├── sketch-container-status\\n├── sketch-network-status\\n├── sketch-view-mode-select\\n├── sketch-timeline (chat view)\\n│   └── sketch-timeline-message\\n│       └── sketch-tool-calls\\n├── sketch-diff-view (code diff view)\\n└── sketch-chat-input\\n```\\n\\n## Component Overview\\n\\n### sketch-app-shell.ts\\nThe main container component that orchestrates the entire UI. It manages:\\n- View modes (chat, diff, charts, terminal)\\n- Network status and connection management\\n- Timeline data fetching and rendering\\n- Auto-scrolling behavior for chat messages\\n\\n### sketch-chat-input.ts\\nHandles user input for sending messages to the CodingAgent:\\n- Text input area with markdown support\\n- Send button and keyboard shortcuts (Enter to send, Shift+Enter for newline)\\n- Auto-focusing behavior\\n\\n### sketch-container-status.ts\\nDisplays information about the container environment:\\n- OS information\\n- Resource usage (CPU, memory)\\n- Container status indicators\\n\\n### sketch-diff-view.ts\\nProvides a visual diff viewer for code changes:\\n- Git commit display\\n- Side-by-side or unified diff viewing\\n- Syntax highlighting for code\\n- Comment creation for code review\\n\\n### sketch-network-status.ts\\nShows the current connection status to the server:\\n- Connected/disconnected indicators\\n- Error messages when connection issues occur\\n- Visual feedback on connection state\\n\\n### sketch-timeline.ts\\nDisplays the conversation history between user and CodingAgent:\\n- Message rendering\\n- Manages the sequence of messages\\n- Handles scrolling behavior\\n\\n### sketch-timeline-message.ts\\nRenders individual messages in the timeline:\\n- Different styling for user vs. agent messages\\n- Markdown rendering with syntax highlighting\\n- Handles special message types\\n\\n### sketch-tool-calls.ts\\nDisplays tool call information within messages:\\n- Tool call parameters and outputs\\n- Expandable/collapsible sections for tool details\\n- Syntax highlighting for code in tool outputs\\n\\n### sketch-view-mode-select.ts\\nProvides UI for switching between different views:\\n- Chat view for conversation\\n- Diff view for code changes\\n- Charts view for data visualization\\n- Terminal view for command execution\\n\\n## Development\\n\\n### Creating New Components\\n\\nWhen creating new components, follow these patterns:\\n\\n1. Use the `@customElement` decorator to define the component\\n2. Encapsulate styles using the static `styles` property\\n3. Use Lit\'s reactive properties (`@property`, `@state`) to manage component state\\n4. Implement lifecycle methods as needed (`connectedCallback`, `disconnectedCallback`, etc.)\\n\\n### Example\\n\\n```typescript\\nimport { css, html, LitElement } from \'lit\';\\nimport { customElement, property } from \'lit/decorators.js\';\\n\\n@customElement(\'sketch-new-component\')\\nexport class SketchNewComponent extends LitElement {\\n  @property()\\n  myProperty: string = \'default\';\\n\\n  static styles = css`\\n    :host {\\n      display: block;\\n    }\\n  `;\\n\\n  render() {\\n    return html`\\n      <div>\\n        ${this.myProperty}\\n      </div>\\n    `;\\n  }\\n}\\n\\ndeclare global {\\n  interface HTMLElementTagNameMap {\\n    \'sketch-new-component\': SketchNewComponent;\\n  }\\n}\\n```\\n\\n### Best Practices\\n\\n1. Maintain a single responsibility for each component\\n2. Use properties and events for parent-child communication\\n3. Document the purpose and API of each component\\n4. Write tests for components where possible\\n5. Keep styles encapsulated within components\\n6. Use type definitions for strong typing\\n\\n## Related Resources\\n\\n- [Lit Documentation](https://lit.dev/docs/)\\n- [Web Components Introduction](https://developer.mozilla.org/en-US/docs/Web/Web_Components)\\n- See `/app/loop/webui/readme.md` for more information on the Loop WebUI project\\n"}]}',
+              tool_result: "- Applied all patches\n",
+              tool_call_id: "toolu_01TNhLX2AWkZwsu2KCLKrpju",
+              timestamp: "2025-04-14T16:32:47.10299854Z",
+              conversation_id: "xsa-8hw0",
+              start_time: "2025-04-14T16:32:47.101660683Z",
+              end_time: "2025-04-14T16:32:47.102994206Z",
+              elapsed: 1333524,
+              idx: 34,
+            },
+          },
+        ],
+        [
+          {
+            name: "done",
+            input:
+              '{"checklist_items":{"code_reviewed":{"status":"yes","description":"If any commits were made, the codereview tool was run and its output was addressed.","comments":"Since this commit only adds a documentation file (README.md) with no functional code changes, a formal code review is not essential, but I\'ve verified the content for accuracy and completeness."},"wrote_tests":{"status":"not applicable","description":"If code was changed, tests were written or updated.","comments":"No code was changed; only documentation was added. The README file is purely informational and doesn\'t require tests."},"passes_tests":{"status":"not applicable","description":"If any commits were made, tests pass.","comments":"No functional code changes were made that would impact existing tests. The addition of a README file is a documentation-only change."},"git_commit":{"status":"yes","description":"Create git commits for any code changes you made. Match the style of recent commit messages. Include \'Co-Authored-By: sketch\' and the original user prompt. Use GIT_AUTHOR_NAME=\\"Sean McCullough\\" GIT_AUTHOR_EMAIL=\\"banksean@gmail.com\\" (not git config).","comments":"Created a commit with a descriptive message that follows the requested format, including \'Co-Authored-By: sketch\' attribution."}}}',
+            tool_call_id: "toolu_01HPgWQJF1aF9LUqkdDKWeES",
+            result_message: {
+              type: "tool",
+              end_of_turn: false,
+              content: "",
+              tool_name: "done",
+              input:
+                '{"checklist_items":{"code_reviewed":{"status":"yes","description":"If any commits were made, the codereview tool was run and its output was addressed.","comments":"Since this commit only adds a documentation file (README.md) with no functional code changes, a formal code review is not essential, but I\'ve verified the content for accuracy and completeness."},"wrote_tests":{"status":"not applicable","description":"If code was changed, tests were written or updated.","comments":"No code was changed; only documentation was added. The README file is purely informational and doesn\'t require tests."},"passes_tests":{"status":"not applicable","description":"If any commits were made, tests pass.","comments":"No functional code changes were made that would impact existing tests. The addition of a README file is a documentation-only change."},"git_commit":{"status":"yes","description":"Create git commits for any code changes you made. Match the style of recent commit messages. Include \'Co-Authored-By: sketch\' and the original user prompt. Use GIT_AUTHOR_NAME=\\"Sean McCullough\\" GIT_AUTHOR_EMAIL=\\"banksean@gmail.com\\" (not git config).","comments":"Created a commit with a descriptive message that follows the requested format, including \'Co-Authored-By: sketch\' attribution."}}}',
+              tool_result:
+                "codereview tool has not been run for commit 0b1f45dc17fbe7800f5164993ec99d6564256787",
+              tool_error: true,
+              tool_call_id: "toolu_01HPgWQJF1aF9LUqkdDKWeES",
+              timestamp: "2025-04-14T16:33:04.639179373Z",
+              conversation_id: "xsa-8hw0",
+              start_time: "2025-04-14T16:33:04.616273148Z",
+              end_time: "2025-04-14T16:33:04.639173456Z",
+              elapsed: 22900309,
+              idx: 43,
+            },
+          },
+        ],
+      ];
+      document.addEventListener("DOMContentLoaded", () => {
+        toolCalls.forEach((calls) => {
+          const jsonEl = document.createElement("pre");
+          jsonEl.innerText = `.toolCalls property: ${JSON.stringify(calls)}`;
+          document.body.append(jsonEl);
+
+          const toolCallsEl = document.createElement("sketch-tool-calls");
+          toolCallsEl.toolCalls = calls;
+          document.body.append(toolCallsEl);
+        });
+      });
+    </script>
+  </head>
+  <body>
+    <h1>sketch-tool-calls demo</h1>
+
+    <sketch-tool-calls></sketch-tool-calls>
+  </body>
+</html>
diff --git a/loop/webui/src/web-components/demo/sketch-view-mode-select.demo.html b/loop/webui/src/web-components/demo/sketch-view-mode-select.demo.html
new file mode 100644
index 0000000..dac6831
--- /dev/null
+++ b/loop/webui/src/web-components/demo/sketch-view-mode-select.demo.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <title>sketch-view-mode-select demo</title>
+    <link rel="stylesheet" href="demo.css" />
+
+    <script src="/dist/web-components/sketch-view-mode-select.js" type="module"></script>
+
+    <script>
+      document.addEventListener("DOMContentLoaded", () => {
+        const viewModeSelect = document.querySelector('sketch-view-mode-select');
+        const msgDiv = document.querySelector("#selected-mode");
+        msgDiv.innerText = `selected mode: ${viewModeSelect.activeMode}`;
+
+        console.log("viewModeSelect: ", viewModeSelect);
+        viewModeSelect.addEventListener("view-mode-select", (evt) => {
+          console.log('view mode change event: ', evt);
+          const msgDiv = document.querySelector("#selected-mode");
+          msgDiv.innerText = `selected mode: ${evt.detail.mode}`;
+        });
+      });
+  </script>
+
+  </head>
+  <body>
+    <h1>sketch-view-mode-select demo</h1>
+
+    <sketch-view-mode-select></sketch-view-mode-select>
+    <div id="selected-mode"></div>
+
+  </body>
+</html>
\ No newline at end of file