diff --git a/services/hermes/agent-deployment.yaml b/services/hermes/agent-deployment.yaml
index ac751946a..10c62a412 100644
--- a/services/hermes/agent-deployment.yaml
+++ b/services/hermes/agent-deployment.yaml
@@ -505,6 +505,11 @@ spec:
                   --pane "${pane}" \
                   --timeout 60000
               fi
+              /opt/hermes/.venv/bin/python /opt/coordinator/herdr_tab_router.py \
+                --workspace-label coordinator \
+                --interval 1 &
+              router_pid=$!
+              trap 'kill "${router_pid}" "${server_pid}" 2>/dev/null || true' TERM INT
               wait "${server_pid}"
           env:
             - {name: HERMES_HOME, value: /opt/data}
diff --git a/services/hermes/kustomization.yaml b/services/hermes/kustomization.yaml
index a79efd17e..4e70d9483 100644
--- a/services/hermes/kustomization.yaml
+++ b/services/hermes/kustomization.yaml
@@ -46,6 +46,7 @@ configMapGenerator:
     files:
       - gitea_askpass.sh=scripts/gitea_askpass.sh
       - herdr_dispatch.py=scripts/herdr_dispatch.py
+      - herdr_tab_router.py=scripts/herdr_tab_router.py
       - 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
diff --git a/services/hermes/scripts/herdr_tab_router.py b/services/hermes/scripts/herdr_tab_router.py
new file mode 100644
index 000000000..eaf78ecac
--- /dev/null
+++ b/services/hermes/scripts/herdr_tab_router.py
@@ -0,0 +1,159 @@
+#!/usr/bin/env python3
+"""Turn interactive tabs in the Agent coordinator space into Hermes sessions."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import re
+import shlex
+import subprocess
+import time
+from pathlib import Path
+from typing import Any, Callable
+
+
+HERDR_BIN = Path("/opt/data/tools/bin/herdr")
+WORKSPACE_ROOT = Path("/opt/data/workspace")
+PROJECT_ROOT = WORKSPACE_ROOT / "projects"
+
+
+def _slug(value: str) -> str:
+    """Return a stable label accepted by Herdr's agent-name argument."""
+    normalized = re.sub(r"[^a-z0-9]+", "-", value.strip().lower()).strip("-")
+    return normalized or "session"
+
+
+def project_for_label(label: str, project_root: Path = PROJECT_ROOT) -> Path | None:
+    """Resolve a tab label to an existing isolated project directory."""
+    wanted = _slug(label)
+    if not project_root.is_dir():
+        return None
+    for candidate in project_root.iterdir():
+        if candidate.is_dir() and _slug(candidate.name) == wanted:
+            return candidate.resolve()
+    return None
+
+
+def _run_json(command: list[str]) -> dict[str, Any]:
+    """Run a Herdr command and return its JSON object response."""
+    completed = subprocess.run(
+        command,
+        text=True,
+        capture_output=True,
+        timeout=130,
+        check=False,
+        env=os.environ.copy(),
+    )
+    if completed.returncode != 0:
+        detail = completed.stderr.strip() or completed.stdout.strip()
+        raise RuntimeError(detail or f"command failed with {completed.returncode}")
+    try:
+        payload = json.loads(completed.stdout)
+    except json.JSONDecodeError as error:
+        raise RuntimeError("Herdr returned non-JSON output") from error
+    if not isinstance(payload, dict):
+        raise RuntimeError("Herdr returned an unexpected response")
+    return payload
+
+
+def _result_list(payload: dict[str, Any], key: str) -> list[dict[str, Any]]:
+    """Extract a typed list from a Herdr response."""
+    result = payload.get("result") or {}
+    values = result.get(key) or []
+    return [item for item in values if isinstance(item, dict)]
+
+
+def find_workspace(
+    label: str,
+    run: Callable[[list[str]], dict[str, Any]] = _run_json,
+) -> str | None:
+    """Return the live workspace id for the named Agent coordinator space."""
+    payload = run([str(HERDR_BIN), "workspace", "list"])
+    matches = [
+        str(item.get("workspace_id") or "")
+        for item in _result_list(payload, "workspaces")
+        if item.get("label") == label
+    ]
+    return next((item for item in matches if item), None)
+
+
+def route_unmanaged_tabs(
+    workspace_id: str,
+    run: Callable[[list[str]], dict[str, Any]] = _run_json,
+    project_root: Path = PROJECT_ROOT,
+) -> list[str]:
+    """Start routed Hermes in every unmanaged pane of the coordinator space."""
+    tabs_payload = run([str(HERDR_BIN), "tab", "list"])
+    panes_payload = run(
+        [str(HERDR_BIN), "pane", "list", "--workspace", workspace_id]
+    )
+    tab_labels = {
+        str(item.get("tab_id") or ""): str(item.get("label") or "session")
+        for item in _result_list(tabs_payload, "tabs")
+        if item.get("workspace_id") == workspace_id
+    }
+    started: list[str] = []
+    for pane in _result_list(panes_payload, "panes"):
+        if pane.get("workspace_id") != workspace_id or pane.get("agent"):
+            continue
+        pane_id = str(pane.get("pane_id") or "")
+        if not pane_id:
+            continue
+        label = tab_labels.get(str(pane.get("tab_id") or ""), "session")
+        project = project_for_label(label, project_root)
+        if project is not None and Path(str(pane.get("foreground_cwd") or "")) != project:
+            run(
+                [
+                    str(HERDR_BIN),
+                    "pane",
+                    "run",
+                    pane_id,
+                    f"cd {shlex.quote(str(project))}",
+                ]
+            )
+        pane_suffix = _slug(pane_id.split(":")[-1])
+        agent_name = f"{_slug(label)}-{pane_suffix}"
+        run(
+            [
+                str(HERDR_BIN),
+                "agent",
+                "start",
+                agent_name,
+                "--kind",
+                "hermes",
+                "--pane",
+                pane_id,
+                "--timeout",
+                "120000",
+            ]
+        )
+        started.append(pane_id)
+    return started
+
+
+def run_loop(label: str, interval: float) -> None:
+    """Continuously reconcile Agent tabs while allowing Herdr to own workers."""
+    while True:
+        try:
+            workspace_id = find_workspace(label)
+            if workspace_id:
+                for pane_id in route_unmanaged_tabs(workspace_id):
+                    print(f"Started routed Hermes session in {pane_id}", flush=True)
+        except Exception as error:
+            print(f"Agent tab routing retry: {type(error).__name__}: {error}", flush=True)
+        time.sleep(interval)
+
+
+def main() -> None:
+    """Parse controller options and reconcile the Agent coordinator space."""
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--workspace-label", default="coordinator")
+    parser.add_argument("--interval", type=float, default=1.0)
+    args = parser.parse_args()
+    run_loop(args.workspace_label, max(args.interval, 0.25))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/testing/tests/test_hermes_herdr.py b/testing/tests/test_hermes_herdr.py
index b25d9941c..c1427b43f 100644
--- a/testing/tests/test_hermes_herdr.py
+++ b/testing/tests/test_hermes_herdr.py
@@ -24,6 +24,7 @@ def _load(name: str):
 
 
 dispatch = _load("herdr_dispatch")
+tab_router = _load("herdr_tab_router")
 auth_patch = _load("patch_hermes_auth")
 
 
@@ -131,6 +132,83 @@ def test_auth_patch_fails_closed_on_upstream_drift(tmp_path: Path):
         auth_patch.patch(source, tmp_path / "patched.py")
 
 
+def test_agent_tab_router_starts_hermes_in_matching_project(tmp_path: Path):
+    projects = tmp_path / "projects"
+    cassandra = projects / "cassandra"
+    cassandra.mkdir(parents=True)
+    calls = []
+
+    def fake_run(command):
+        calls.append(command)
+        if command[1:3] == ["tab", "list"]:
+            return {
+                "result": {
+                    "tabs": [
+                        {
+                            "tab_id": "w2:t2",
+                            "workspace_id": "w2",
+                            "label": "Cassandra",
+                        }
+                    ]
+                }
+            }
+        if command[1:3] == ["pane", "list"]:
+            return {
+                "result": {
+                    "panes": [
+                        {
+                            "pane_id": "w2:p1",
+                            "tab_id": "w2:t1",
+                            "workspace_id": "w2",
+                            "agent": "hermes",
+                        },
+                        {
+                            "pane_id": "w2:p2",
+                            "tab_id": "w2:t2",
+                            "workspace_id": "w2",
+                            "foreground_cwd": str(tmp_path),
+                        },
+                    ]
+                }
+            }
+        return {"result": {"ok": True}}
+
+    started = tab_router.route_unmanaged_tabs("w2", fake_run, projects)
+
+    assert started == ["w2:p2"]
+    assert calls[-2][1:4] == ["pane", "run", "w2:p2"]
+    assert calls[-2][-1] == f"cd {cassandra.resolve()}"
+    assert calls[-1][1:] == [
+        "agent",
+        "start",
+        "cassandra-p2",
+        "--kind",
+        "hermes",
+        "--pane",
+        "w2:p2",
+        "--timeout",
+        "120000",
+    ]
+
+
+def test_agent_tab_router_only_targets_coordinator_workspace():
+    calls = []
+
+    def fake_run(command):
+        calls.append(command)
+        return {
+            "result": {
+                "workspaces": [
+                    {"workspace_id": "w2", "label": "coordinator"},
+                    {"workspace_id": "w3", "label": "codex-worker"},
+                ]
+            }
+        }
+
+    assert tab_router.find_workspace("coordinator", fake_run) == "w2"
+    assert calls == [[str(tab_router.HERDR_BIN), "workspace", "list"]]
+
+
 def test_agent_ttyd_defers_identity_to_owner_only_oauth_boundary():
     deployment = yaml.safe_load((HERMES / "agent-deployment.yaml").read_text())
     containers = deployment["spec"]["template"]["spec"]["containers"]
@@ -235,6 +313,8 @@ def test_agent_installs_hermes_integration_before_startup():
     assert 'item["workspace_id"] != active' in server_command
     assert 'herdr workspace close "${stale_workspace}"' in server_command
     assert "herdr agent start coordinator" in server_command
+    assert "/opt/coordinator/herdr_tab_router.py" in server_command
+    assert "--workspace-label coordinator" in server_command
     assert "--kind hermes" in server_command
     assert "--timeout 60000" in server_command
     assert "--env AGENT_BROWSER_EXECUTABLE_PATH=" in server_command