diff --git a/services/hermes/agent-deployment.yaml b/services/hermes/agent-deployment.yaml
index 5be29eec9..633e1e5c7 100644
--- a/services/hermes/agent-deployment.yaml
+++ b/services/hermes/agent-deployment.yaml
@@ -24,7 +24,7 @@ spec:
         ai.bstein.dev/execution: Herdr-supervised Codex and Claude Code
         ai.bstein.dev/model-policy: Jetson-assisted AUTO routing, low through xhigh, cross-provider fallback
         ai.bstein.dev/placement: rpi5 preferred; Jetson deferred until state storage is available
-        ai.bstein.dev/config-rev: "20260809-cassandra-readonly"
+        ai.bstein.dev/config-rev: "20260809-terminal-clipboard"
         vault.hashicorp.com/agent-inject: "true"
         vault.hashicorp.com/role: hermes-agent
         vault.hashicorp.com/agent-inject-secret-anthropic-token: kv/data/atlas/hermes/agent-tokens
@@ -269,6 +269,27 @@ spec:
           resources:
             requests: {cpu: 25m, memory: 32Mi}
             limits: {cpu: 250m, memory: 128Mi}
+        - name: prepare-ttyd-index
+          image: registry.bstein.dev/bstein/hermes-agent@sha256:7a1daefae2f068dcf14e7eb1f2f9aab2e1ce79c1b55b4bb0aa1092fbf4019bbc
+          imagePullPolicy: IfNotPresent
+          command:
+            - /opt/hermes/.venv/bin/python
+            - /opt/coordinator/patch_ttyd_index.py
+            - /opt/data/tools/bin/ttyd
+            - /ttyd-index/index.html
+          securityContext:
+            allowPrivilegeEscalation: false
+            runAsUser: 10000
+            runAsGroup: 10000
+            seccompProfile:
+              type: RuntimeDefault
+          volumeMounts:
+            - {name: home, mountPath: /opt/data}
+            - {name: coordinator, mountPath: /opt/coordinator, readOnly: true}
+            - {name: ttyd-index, mountPath: /ttyd-index}
+          resources:
+            requests: {cpu: 25m, memory: 32Mi}
+            limits: {cpu: 250m, memory: 128Mi}
       containers:
         - name: hermes
           image: registry.bstein.dev/bstein/hermes-agent@sha256:7a1daefae2f068dcf14e7eb1f2f9aab2e1ce79c1b55b4bb0aa1092fbf4019bbc
@@ -401,6 +422,7 @@ spec:
                 --port 7681 \
                 --cwd /opt/data/workspace \
                 --terminal-type xterm-256color \
+                --index /ttyd-index/index.html \
                 --client-option "titleFixed=Hermes Agent - HERDR" \
                 --client-option fontSize=15 \
                 /bin/sh -c '
@@ -423,6 +445,7 @@ spec:
           volumeMounts:
             - {name: home, mountPath: /opt/data}
             - {name: tmp, mountPath: /tmp}
+            - {name: ttyd-index, mountPath: /ttyd-index, readOnly: true}
           startupProbe:
             tcpSocket: {port: herdr-tui}
             periodSeconds: 5
@@ -603,3 +626,6 @@ spec:
         - name: tmp
           emptyDir:
             sizeLimit: 256Mi
+        - name: ttyd-index
+          emptyDir:
+            sizeLimit: 2Mi
diff --git a/services/hermes/kustomization.yaml b/services/hermes/kustomization.yaml
index 64740d87d..49251205c 100644
--- a/services/hermes/kustomization.yaml
+++ b/services/hermes/kustomization.yaml
@@ -50,6 +50,7 @@ configMapGenerator:
       - hermes_coordinator.py=scripts/hermes_coordinator.py
       - hermes_model_routing.py=scripts/hermes_model_routing.py
       - patch_hermes_auth.py=scripts/patch_hermes_auth.py
+      - patch_ttyd_index.py=scripts/patch_ttyd_index.py
     options:
       disableNameSuffixHash: true
   - name: hermes-agent-kubeconfig
diff --git a/services/hermes/scripts/patch_ttyd_index.py b/services/hermes/scripts/patch_ttyd_index.py
new file mode 100644
index 000000000..cb4a293c8
--- /dev/null
+++ b/services/hermes/scripts/patch_ttyd_index.py
@@ -0,0 +1,176 @@
+#!/usr/bin/env python3
+"""Add reliable browser clipboard handling to ttyd's pinned client page."""
+
+from __future__ import annotations
+
+import argparse
+import socket
+import subprocess
+import time
+import urllib.request
+from pathlib import Path
+
+
+MARKER = "atlas-ttyd-clipboard"
+UPSTREAM_COPY = 'document.execCommand("copy")'
+CLIPBOARD_ADAPTER = r"""
+<style>
+  #atlas-clipboard-status {
+    background: #181825;
+    border: 1px solid #f9e2af;
+    border-radius: 6px;
+    color: #f9e2af;
+    font: 13px/1.4 monospace;
+    padding: 6px 10px;
+    position: fixed;
+    right: 12px;
+    top: 12px;
+    z-index: 10000;
+  }
+</style>
+<script id="atlas-ttyd-clipboard">
+(() => {
+  const showStatus = (message, failed = false) => {
+    let status = document.getElementById('atlas-clipboard-status');
+    if (!status) {
+      status = document.createElement('div');
+      status.id = 'atlas-clipboard-status';
+      document.body.appendChild(status);
+    }
+    status.textContent = message;
+    status.style.borderColor = failed ? '#f38ba8' : '#a6e3a1';
+    status.style.color = failed ? '#f38ba8' : '#a6e3a1';
+    clearTimeout(status.removeTimer);
+    status.removeTimer = setTimeout(() => status.remove(), 1200);
+  };
+
+  const fallbackCopy = (text) => {
+    const input = document.createElement('textarea');
+    input.value = text;
+    input.setAttribute('readonly', '');
+    input.style.position = 'fixed';
+    input.style.opacity = '0';
+    document.body.appendChild(input);
+    input.select();
+    const copied = document.execCommand('copy');
+    input.remove();
+    if (!copied) throw new Error('browser rejected clipboard write');
+  };
+
+  const install = () => {
+    const term = window.term;
+    if (!term) {
+      setTimeout(install, 50);
+      return;
+    }
+    if (term.__atlasClipboardInstalled) return;
+    term.__atlasClipboardInstalled = true;
+
+    const copySelection = async () => {
+      const text = term.getSelection();
+      if (!text) return false;
+      try {
+        if (navigator.clipboard && window.isSecureContext) {
+          await navigator.clipboard.writeText(text);
+        } else {
+          fallbackCopy(text);
+        }
+        showStatus('Copied selection');
+        return true;
+      } catch (error) {
+        try {
+          fallbackCopy(text);
+          showStatus('Copied selection');
+          return true;
+        } catch (fallbackError) {
+          console.error('[atlas] clipboard copy failed', error, fallbackError);
+          showStatus('Clipboard copy failed', true);
+          return false;
+        }
+      }
+    };
+
+    window.addEventListener('mouseup', () => {
+      if (term.hasSelection()) void copySelection();
+    });
+    window.addEventListener('keydown', (event) => {
+      const copyKey = event.key.toLowerCase() === 'c'
+        && (event.ctrlKey || event.metaKey)
+        && term.hasSelection();
+      if (!copyKey) return;
+      event.preventDefault();
+      event.stopImmediatePropagation();
+      void copySelection();
+    }, true);
+  };
+
+  install();
+})();
+</script>
+"""
+
+
+def patch_html(content: str) -> str:
+    """Insert the adapter once and disable ttyd's false-success copy call."""
+    if content.count(UPSTREAM_COPY) != 1 or content.count("</body>") != 1:
+        raise RuntimeError("ttyd index patch context changed")
+    if MARKER in content:
+        raise RuntimeError("ttyd index is already patched")
+    content = content.replace(UPSTREAM_COPY, "void 0", 1)
+    return content.replace("</body>", f"{CLIPBOARD_ADAPTER}</body>", 1)
+
+
+def fetch_embedded_index(ttyd: Path) -> str:
+    """Serve and retrieve ttyd's embedded page without vendoring its bundle."""
+    with socket.socket() as listener:
+        listener.bind(("127.0.0.1", 0))
+        port = listener.getsockname()[1]
+    process = subprocess.Popen(
+        [
+            str(ttyd),
+            "--interface",
+            "127.0.0.1",
+            "--port",
+            str(port),
+            "/bin/sh",
+            "-c",
+            "sleep 30",
+        ],
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
+    try:
+        for _ in range(100):
+            try:
+                with urllib.request.urlopen(
+                    f"http://127.0.0.1:{port}/", timeout=1
+                ) as response:
+                    return response.read().decode("utf-8")
+            except OSError:
+                if process.poll() is not None:
+                    raise RuntimeError("temporary ttyd exited before serving its index")
+                time.sleep(0.05)
+        raise RuntimeError("timed out retrieving ttyd's embedded index")
+    finally:
+        process.terminate()
+        try:
+            process.wait(timeout=3)
+        except subprocess.TimeoutExpired:
+            process.kill()
+            process.wait(timeout=3)
+
+
+def main() -> int:
+    """Generate one patched index for the ttyd sidecar."""
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("ttyd", type=Path)
+    parser.add_argument("output", type=Path)
+    args = parser.parse_args()
+    content = patch_html(fetch_embedded_index(args.ttyd))
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    args.output.write_text(content, encoding="utf-8")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/testing/tests/test_hermes_herdr.py b/testing/tests/test_hermes_herdr.py
index 0b0ca1931..69aea9717 100644
--- a/testing/tests/test_hermes_herdr.py
+++ b/testing/tests/test_hermes_herdr.py
@@ -26,6 +26,7 @@ def _load(name: str):
 dispatch = _load("herdr_dispatch")
 tab_router = _load("herdr_tab_router")
 auth_patch = _load("patch_hermes_auth")
+ttyd_patch = _load("patch_ttyd_index")
 
 
 def test_herdr_plan_chooses_task_shape_and_caps_effort():
@@ -132,6 +133,25 @@ def test_auth_patch_fails_closed_on_upstream_drift(tmp_path: Path):
         auth_patch.patch(source, tmp_path / "patched.py")
 
 
+def test_ttyd_clipboard_patch_uses_system_clipboard_and_preserves_interrupt():
+    source = (
+        '<html><body><script>document.execCommand("copy")</script></body></html>'
+    )
+    content = ttyd_patch.patch_html(source)
+
+    assert 'id="atlas-ttyd-clipboard"' in content
+    assert "navigator.clipboard.writeText(text)" in content
+    assert "term.hasSelection()" in content
+    assert "event.stopImmediatePropagation()" in content
+    assert 'document.execCommand("copy")' not in content
+    assert "document.execCommand('copy')" in content
+
+
+def test_ttyd_clipboard_patch_fails_closed_on_upstream_drift():
+    with pytest.raises(RuntimeError, match="context changed"):
+        ttyd_patch.patch_html("<html><body>changed</body></html>")
+
+
 def test_agent_tab_router_starts_hermes_in_matching_project(tmp_path: Path):
     projects = tmp_path / "projects"
     cassandra = projects / "cassandra"
@@ -217,6 +237,13 @@ def test_agent_ttyd_defers_identity_to_owner_only_oauth_boundary():
 
     assert "--check-origin" in command
     assert "--auth-header" not in command
+    assert "--index /ttyd-index/index.html" in command
+
+    init_names = {
+        container["name"]
+        for container in deployment["spec"]["template"]["spec"]["initContainers"]
+    }
+    assert "prepare-ttyd-index" in init_names
 
     oauth_documents = [
         document