feat: add tabs to socket api

10 files changed, 1031 insertions, 23 deletions

diff --git a/README.md b/README.md
index 4f94ab27..7a336f60 100644
--- a/README.md
+++ b/README.md
@@ -79,11 +79,12 @@ herdr is not just a passive manager for humans watching agents. it gives agents
 - [`SKILL.md`](./SKILL.md) — the reusable agent skill. use this if you want an agent inside herdr to learn the workflow quickly through the existing cli surface.
 - [`SOCKET_API.md`](./SOCKET_API.md) — the direct integration doc. use this if you want the low-level socket protocol, event subscriptions, or the cli wrapper reference that sits on top of it.
 
-those two paths meet at the same control surface. the built-in `herdr workspace ...`, `herdr pane ...`, and `herdr wait ...` commands all talk to the same local socket api.
+those two paths meet at the same control surface. the built-in `herdr workspace ...`, `herdr tab ...`, `herdr pane ...`, and `herdr wait ...` commands all talk to the same local socket api.
 
 that means agents running inside herdr can do useful orchestration work themselves:
 
 - create new workspaces for parallel tasks
+- create and focus tabs inside a workspace
 - split panes for servers, logs, tests, or scratch work
 - spawn other agents in sibling panes
 - read pane output or wait for output matches
@@ -243,6 +244,8 @@ for all keybindings, onboarding, notification, sound, ui options, and environmen
 
 herdr saves your workspaces, tabs, pane layouts, pane working directories, and focused tab/pane on exit. when you restart, everything is restored. sessions are stored at `~/.config/herdr/session.json`.
 
+through the socket api, tabs are first-class too now. raw integrations and cli wrappers can list/create/focus/rename/close tabs directly while pane ids stay workspace-scoped.
+
 use `--no-session` to start fresh.
 
 ## how agent detection works
@@ -296,7 +299,7 @@ for direct integration details, use the docs instead of reverse-engineering the
 - [`SKILL.md`](./SKILL.md) — reusable agent skill for agents already running inside herdr
 - [`SOCKET_API.md`](./SOCKET_API.md) — canonical socket protocol + cli wrapper reference
 
-`SOCKET_API.md` now covers transport, request/response envelopes, workspace and pane methods, subscription behavior, and the `herdr workspace`, `herdr pane`, and `herdr wait` commands that wrap the same socket surface.
+`SOCKET_API.md` now covers transport, request/response envelopes, workspace, tab, and pane methods, subscription behavior, and the `herdr workspace`, `herdr tab`, `herdr pane`, and `herdr wait` commands that wrap the same socket surface.
 
 ## what's coming
 
@@ -315,12 +318,13 @@ there will be rough edges. if you hit one, [open an issue](https://github.com/og
 
 ## cli wrappers
 
-herdr's workspace, pane, and wait commands are documented in [`SOCKET_API.md`](./SOCKET_API.md) together with the socket methods they wrap.
+herdr's workspace, tab, pane, and wait commands are documented in [`SOCKET_API.md`](./SOCKET_API.md) together with the socket methods they wrap.
 
 workspace ids are compact public ids like `1`, `2`, `3`.
+tab ids are compact public ids like `1:1`, `1:2`, `2:1`.
 pane ids are compact public ids like `1-1`, `1-2`, `2-1`.
 
-even with tabs enabled, pane ids remain workspace-scoped public ids rather than `workspace-tab-pane` triples. they are positional within the current live session, so numbering compacts when workspaces or panes are closed.
+even with tabs enabled, pane ids remain workspace-scoped public ids rather than `workspace-tab-pane` triples. both tab ids and pane ids are positional within the current live session, so numbering compacts when tabs, workspaces, or panes are closed.
 
 ## building from source
 
diff --git a/SKILL.md b/SKILL.md
index 5032bf0e..78d1a3d5 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -1,30 +1,33 @@
 ---
 name: herdr
-description: "Control herdr from inside it. Split panes, spawn agents, read output, wait for state changes, and manage workspaces — all via CLI commands that talk to the running herdr instance over a local unix socket. Use when running inside herdr (HERDR_ENV=1)."
+description: "Control herdr from inside it. Manage workspaces and tabs, split panes, spawn agents, read output, and wait for state changes — all via CLI commands that talk to the running herdr instance over a local unix socket. Use when running inside herdr (HERDR_ENV=1)."
 ---
 
 # herdr — agent skill
 
-you are running inside herdr, a terminal-native agent multiplexer. herdr gives you workspaces and panes — each pane is a real terminal with its own shell, agent, server, or log stream — and you can control all of it from the cli.
+you are running inside herdr, a terminal-native agent multiplexer. herdr gives you workspaces, tabs, and panes — each pane is a real terminal with its own shell, agent, server, or log stream — and you can control all of it from the cli.
 
 this means you can:
 
 - see what other panes and agents are doing
+- create tabs for separate subcontexts inside one workspace
 - split panes and run commands in them
 - start servers, watch logs, and run tests in sibling panes
 - wait for specific output before continuing
 - wait for another agent to finish
 - spawn more agent instances
 
-the `herdr` binary is available in your PATH. its workspace, pane, and wait commands talk to the running herdr instance over a local unix socket.
+the `herdr` binary is available in your PATH. its workspace, tab, pane, and wait commands talk to the running herdr instance over a local unix socket.
 
 if you need the raw protocol or full api reference, read [`SOCKET_API.md`](./SOCKET_API.md).
 
 ## concepts
 
-**workspaces** are project contexts. each workspace has one or more panes.
+**workspaces** are project contexts. each workspace has one or more tabs.
 
-**panes** are terminal splits inside a workspace. each pane runs its own process — a shell, an agent, a server, anything.
+**tabs** are subcontexts inside a workspace. each tab has one or more panes.
+
+**panes** are terminal splits inside a tab. each pane runs its own process — a shell, an agent, a server, anything.
 
 **agent state** is detected automatically by herdr. each pane can be:
 
@@ -33,9 +36,9 @@ if you need the raw protocol or full api reference, read [`SOCKET_API.md`](./SOC
 - `blocked` — agent needs input or approval
 - `unknown` — no recognized agent, or just a shell
 
-**ids** — workspace ids look like `1`, `2`. pane ids look like `1-1`, `1-2`, `2-1`. these are compact public ids for the current live session.
+**ids** — workspace ids look like `1`, `2`. tab ids look like `1:1`, `1:2`, `2:1`. pane ids look like `1-1`, `1-2`, `2-1`. these are compact public ids for the current live session.
 
-important: ids can compact when panes or workspaces are closed. do not treat them as durable ids.
+important: ids can compact when tabs, panes, or workspaces are closed. do not treat them as durable ids.
 
 ## discover yourself
 
@@ -53,6 +56,38 @@ list workspaces:
 herdr workspace list
 ```
 
+## tab management
+
+list tabs in the current workspace:
+
+```bash
+herdr tab list --workspace 1
+```
+
+create a new tab:
+
+```bash
+herdr tab create --workspace 1
+```
+
+rename it:
+
+```bash
+herdr tab rename 1:2 "logs"
+```
+
+focus it:
+
+```bash
+herdr tab focus 1:2
+```
+
+close it:
+
+```bash
+herdr tab close 1:2
+```
+
 ## read another pane
 
 see what is on another pane's screen:
@@ -221,7 +256,7 @@ herdr pane read 1-1 --source recent --lines 100
 
 ## notes
 
-- `workspace list`, `pane list`, `workspace create`, `pane split`, `wait output`, and `wait agent-state` print json on success.
+- `workspace list`, `workspace create`, `tab list`, `tab create`, `tab get`, `tab focus`, `tab rename`, `tab close`, `pane list`, `pane get`, `pane split`, `wait output`, and `wait agent-state` print json on success.
 - `pane read` prints text, not json.
 - `pane send-text`, `pane send-keys`, and `pane run` print nothing on success.
 - parse ids from `workspace create` and `pane split` responses when you need the new ids. do not guess.
diff --git a/SOCKET_API.md b/SOCKET_API.md
index cff166c5..53fa9d52 100644
--- a/SOCKET_API.md
+++ b/SOCKET_API.md
@@ -9,7 +9,7 @@ if you are teaching an agent that is already running inside herdr, start with [`
 there are three practical ways to integrate with herdr:
 
 - **agent skill** — [`SKILL.md`](./SKILL.md). best when an agent inside herdr just needs to learn the workflow quickly.
-- **cli wrappers** — `herdr workspace ...`, `herdr pane ...`, `herdr wait ...`. best for shell scripts and simple orchestration.
+- **cli wrappers** — `herdr workspace ...`, `herdr tab ...`, `herdr pane ...`, `herdr wait ...`. best for shell scripts and simple orchestration.
 - **raw socket api** — best when you want direct request/response control or long-lived event subscriptions.
 
 these layers are intentionally stacked on top of the same control surface.
@@ -87,7 +87,12 @@ that means:
 
 these are compact public ids for the current live session. they are **not durable database ids**. if a workspace or pane closes, higher numbers compact down.
 
-herdr now supports tabs inside workspaces in the ui, but pane ids remain workspace-scoped public ids like `1-2` rather than `workspace-tab-pane` triples. tabs are not exposed as first-class socket api objects yet.
+tabs are first-class socket api objects now.
+
+- tab ids look like `1:1`, `1:2`, `2:1`
+- first number = workspace number
+- second number = tab number within that workspace
+- pane ids still stay workspace-scoped like `1-2` rather than becoming `workspace-tab-pane` triples
 
 ## core objects
 
@@ -100,6 +105,22 @@ herdr now supports tabs inside workspaces in the ui, but pane ids remain workspa
   "label": "herdr",
   "focused": true,
   "pane_count": 1,
+  "tab_count": 1,
+  "active_tab_id": "1:1",
+  "agent_state": "unknown"
+}
+```
+
+`tab_info` responses contain objects like:
+
+```json
+{
+  "tab_id": "1:1",
+  "workspace_id": "1",
+  "number": 1,
+  "label": "1",
+  "focused": true,
+  "pane_count": 1,
   "agent_state": "unknown"
 }
 ```
@@ -110,6 +131,7 @@ herdr now supports tabs inside workspaces in the ui, but pane ids remain workspa
 {
   "pane_id": "1-1",
   "workspace_id": "1",
+  "tab_id": "1:1",
   "focused": true,
   "cwd": "/home/can/Projects/herdr",
   "agent": "pi",
@@ -124,6 +146,7 @@ herdr now supports tabs inside workspaces in the ui, but pane ids remain workspa
 {
   "pane_id": "1-1",
   "workspace_id": "1",
+  "tab_id": "1:1",
   "source": "recent",
   "text": "...",
   "revision": 0,
@@ -149,6 +172,12 @@ agent states are:
 | `workspace.focus` | focus a workspace | `workspace_info` |
 | `workspace.rename` | rename a workspace | `workspace_info` |
 | `workspace.close` | close a workspace | `ok` |
+| `tab.list` | list tabs, optionally filtered by workspace | `tab_list` |
+| `tab.get` | inspect one tab | `tab_info` |
+| `tab.create` | create a tab in a workspace | `tab_info` |
+| `tab.focus` | focus a tab | `tab_info` |
+| `tab.rename` | rename a tab | `tab_info` |
+| `tab.close` | close a tab | `ok` |
 | `pane.list` | list panes, optionally filtered by workspace | `pane_list` |
 | `pane.get` | inspect one pane | `pane_info` |
 | `pane.read` | read pane output | `pane_read` |
@@ -218,6 +247,8 @@ example response:
       "label": "herdr",
       "focused": true,
       "pane_count": 1,
+      "tab_count": 1,
+      "active_tab_id": "1:1",
       "agent_state": "unknown"
     }
   }
@@ -270,6 +301,104 @@ returns:
 }
 ```
 
+## tab methods
+
+### `tab.list`
+
+request with no filter:
+
+```json
+{
+  "id": "req_tabs",
+  "method": "tab.list",
+  "params": {}
+}
+```
+
+request filtered to one workspace:
+
+```json
+{
+  "id": "req_tabs_ws",
+  "method": "tab.list",
+  "params": {
+    "workspace_id": "1"
+  }
+}
+```
+
+returns `tab_list`.
+
+### `tab.get`
+
+params:
+
+```json
+{
+  "tab_id": "1:2"
+}
+```
+
+returns `tab_info`.
+
+### `tab.create`
+
+params:
+
+```json
+{
+  "workspace_id": "1",
+  "cwd": "/home/can/Projects/herdr",
+  "focus": true
+}
+```
+
+notes:
+
+- `workspace_id` is optional and defaults to the active workspace
+- `cwd` is optional; if omitted, herdr uses the focused pane cwd in that workspace when available
+- `focus` is optional in raw socket requests and defaults to `false`
+- the cli wrapper focuses by default unless you pass `--no-focus`
+
+returns `tab_info` for the new tab.
+
+### `tab.focus`
+
+params:
+
+```json
+{
+  "tab_id": "1:2"
+}
+```
+
+returns focused `tab_info`.
+
+### `tab.rename`
+
+params:
+
+```json
+{
+  "tab_id": "1:2",
+  "label": "logs"
+}
+```
+
+returns updated `tab_info`.
+
+### `tab.close`
+
+params:
+
+```json
+{
+  "tab_id": "1:2"
+}
+```
+
+returns `ok`. the last tab in a workspace cannot be closed.
+
 ## pane methods
 
 ### `pane.list`
@@ -345,6 +474,7 @@ example response:
     "read": {
       "pane_id": "1-1",
       "workspace_id": "1",
+      "tab_id": "1:1",
       "source": "recent",
       "text": "...",
       "revision": 0,
@@ -464,6 +594,7 @@ example success response:
     "read": {
       "pane_id": "1-1",
       "workspace_id": "1",
+      "tab_id": "1:1",
       "source": "recent",
       "text": "...server ready...",
       "revision": 0,
@@ -497,6 +628,10 @@ base lifecycle subscriptions:
 - `workspace.created`
 - `workspace.closed`
 - `workspace.focused`
+- `tab.created`
+- `tab.closed`
+- `tab.focused`
+- `tab.renamed`
 - `pane.created`
 - `pane.closed`
 - `pane.focused`
@@ -533,6 +668,10 @@ request:
     "subscriptions": [
       { "type": "workspace.created" },
       { "type": "workspace.focused" },
+      { "type": "tab.created" },
+      { "type": "tab.focused" },
+      { "type": "tab.renamed" },
+      { "type": "tab.closed" },
       { "type": "pane.created" },
       { "type": "pane.focused" },
       { "type": "pane.agent_detected" },
@@ -555,6 +694,8 @@ example pushed event:
       "label": "herdr",
       "focused": true,
       "pane_count": 1,
+      "tab_count": 1,
+      "active_tab_id": "1:1",
       "agent_state": "unknown"
     }
   }
@@ -604,6 +745,7 @@ example pushed `pane.output_matched` event:
     "read": {
       "pane_id": "1-1",
       "workspace_id": "1",
+      "tab_id": "1:1",
       "source": "recent",
       "text": "...server ready...",
       "revision": 0,
@@ -644,6 +786,17 @@ herdr workspace rename <workspace_id> <label>
 herdr workspace close <workspace_id>
 ```
 
+tab commands:
+
+```text
+herdr tab list [--workspace <workspace_id>]
+herdr tab create [--workspace <workspace_id>] [--cwd PATH] [--no-focus]
+herdr tab get <tab_id>
+herdr tab focus <tab_id>
+herdr tab rename <tab_id> <label>
+herdr tab close <tab_id>
+```
+
 pane commands:
 
 ```text
@@ -667,6 +820,7 @@ herdr wait agent-state <pane_id> --state <idle|working|blocked|unknown> [--timeo
 ### cli behavior notes
 
 - `workspace create` focuses by default; pass `--no-focus` to keep focus where it is
+- `tab create` focuses by default; pass `--no-focus` to keep focus where it is
 - `pane split` focuses the new pane by default; pass `--no-focus` to keep focus on the original pane
 - `pane read` prints **text**, not json
 - `pane send-text`, `pane send-keys`, and `pane run` print nothing on success
diff --git a/src/api/mod.rs b/src/api/mod.rs
index bf95bf29..2e7692a4 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -430,6 +430,22 @@ impl ActiveSubscription {
                 event_kind: crate::api::schema::EventKind::WorkspaceFocused,
                 last_sequence: 0,
             })),
+            Subscription::TabCreated {} => Ok(Self::Event(ActiveEventSubscription {
+                event_kind: crate::api::schema::EventKind::TabCreated,
+                last_sequence: 0,
+            })),
+            Subscription::TabClosed {} => Ok(Self::Event(ActiveEventSubscription {
+                event_kind: crate::api::schema::EventKind::TabClosed,
+                last_sequence: 0,
+            })),
+            Subscription::TabFocused {} => Ok(Self::Event(ActiveEventSubscription {
+                event_kind: crate::api::schema::EventKind::TabFocused,
+                last_sequence: 0,
+            })),
+            Subscription::TabRenamed {} => Ok(Self::Event(ActiveEventSubscription {
+                event_kind: crate::api::schema::EventKind::TabRenamed,
+                last_sequence: 0,
+            })),
             Subscription::PaneCreated {} => Ok(Self::Event(ActiveEventSubscription {
                 event_kind: crate::api::schema::EventKind::PaneCreated,
                 last_sequence: 0,
diff --git a/src/api/schema.rs b/src/api/schema.rs
index a187a889..5a27b01b 100644
--- a/src/api/schema.rs
+++ b/src/api/schema.rs
@@ -24,6 +24,18 @@ pub enum Method {
     WorkspaceRename(WorkspaceRenameParams),
     #[serde(rename = "workspace.close")]
     WorkspaceClose(WorkspaceTarget),
+    #[serde(rename = "tab.create")]
+    TabCreate(TabCreateParams),
+    #[serde(rename = "tab.list")]
+    TabList(TabListParams),
+    #[serde(rename = "tab.get")]
+    TabGet(TabTarget),
+    #[serde(rename = "tab.focus")]
+    TabFocus(TabTarget),
+    #[serde(rename = "tab.rename")]
+    TabRename(TabRenameParams),
+    #[serde(rename = "tab.close")]
+    TabClose(TabTarget),
     #[serde(rename = "pane.split")]
     PaneSplit(PaneSplitParams),
     #[serde(rename = "pane.list")]
@@ -69,6 +81,11 @@ pub struct PaneTarget {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct TabTarget {
+    pub tab_id: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct WorkspaceCreateParams {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub cwd: Option<String>,
@@ -83,6 +100,28 @@ pub struct WorkspaceRenameParams {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct TabCreateParams {
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub workspace_id: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub cwd: Option<String>,
+    #[serde(default)]
+    pub focus: bool,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub struct TabListParams {
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub workspace_id: Option<String>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct TabRenameParams {
+    pub tab_id: String,
+    pub label: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct PaneSplitParams {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub workspace_id: Option<String>,
@@ -174,6 +213,14 @@ pub enum Subscription {
     WorkspaceClosed {},
     #[serde(rename = "workspace.focused")]
     WorkspaceFocused {},
+    #[serde(rename = "tab.created")]
+    TabCreated {},
+    #[serde(rename = "tab.closed")]
+    TabClosed {},
+    #[serde(rename = "tab.focused")]
+    TabFocused {},
+    #[serde(rename = "tab.renamed")]
+    TabRenamed {},
     #[serde(rename = "pane.created")]
     PaneCreated {},
     #[serde(rename = "pane.closed")]
@@ -247,6 +294,23 @@ pub enum EventMatch {
     WorkspaceFocused {
         workspace_id: String,
     },
+    TabCreated {
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        tab_id: Option<String>,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        workspace_id: Option<String>,
+    },
+    TabClosed {
+        tab_id: String,
+    },
+    TabRenamed {
+        tab_id: String,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        label: Option<String>,
+    },
+    TabFocused {
+        tab_id: String,
+    },
     PaneCreated {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pane_id: Option<String>,
@@ -285,6 +349,10 @@ pub enum EventKind {
     WorkspaceClosed,
     WorkspaceRenamed,
     WorkspaceFocused,
+    TabCreated,
+    TabClosed,
+    TabRenamed,
+    TabFocused,
     PaneCreated,
     PaneClosed,
     PaneFocused,
@@ -324,6 +392,12 @@ pub enum ResponseResult {
     WorkspaceList {
         workspaces: Vec<WorkspaceInfo>,
     },
+    TabInfo {
+        tab: TabInfo,
+    },
+    TabList {
+        tabs: Vec<TabInfo>,
+    },
     PaneInfo {
         pane: PaneInfo,
     },
@@ -353,6 +427,19 @@ pub struct WorkspaceInfo {
     pub label: String,
     pub focused: bool,
     pub pane_count: usize,
+    pub tab_count: usize,
+    pub active_tab_id: String,
+    pub agent_state: PaneAgentState,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct TabInfo {
+    pub tab_id: String,
+    pub workspace_id: String,
+    pub number: usize,
+    pub label: String,
+    pub focused: bool,
+    pub pane_count: usize,
     pub agent_state: PaneAgentState,
 }
 
@@ -360,6 +447,7 @@ pub struct WorkspaceInfo {
 pub struct PaneInfo {
     pub pane_id: String,
     pub workspace_id: String,
+    pub tab_id: String,
     pub focused: bool,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub cwd: Option<String>,
@@ -373,6 +461,7 @@ pub struct PaneInfo {
 pub struct PaneReadResult {
     pub pane_id: String,
     pub workspace_id: String,
+    pub tab_id: String,
     pub source: ReadSource,
     pub text: String,
     pub revision: u64,
@@ -438,6 +527,22 @@ pub enum EventData {
     WorkspaceFocused {
         workspace_id: String,
     },
+    TabCreated {
+        tab: TabInfo,
+    },
+    TabClosed {
+        tab_id: String,
+        workspace_id: String,
+    },
+    TabRenamed {
+        tab_id: String,
+        workspace_id: String,
+        label: String,
+    },
+    TabFocused {
+        tab_id: String,
+        workspace_id: String,
+    },
     PaneCreated {
         pane: PaneInfo,
     },
@@ -682,6 +787,7 @@ mod tests {
                 read: PaneReadResult {
                     pane_id: "p_1_1".into(),
                     workspace_id: "w_1".into(),
+                    tab_id: "t_1_1".into(),
                     source: ReadSource::Recent,
                     text: "auth: received\n".into(),
                     revision: 0,
diff --git a/src/app/mod.rs b/src/app/mod.rs
index 5f5d5072..311e5f82 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -90,6 +90,10 @@ fn api_request_changes_ui(request: &crate::api::schema::Request) -> bool {
             | Method::WorkspaceFocus(_)
             | Method::WorkspaceRename(_)
             | Method::WorkspaceClose(_)
+            | Method::TabCreate(_)
+            | Method::TabFocus(_)
+            | Method::TabRename(_)
+            | Method::TabClose(_)
             | Method::PaneSplit(_)
             | Method::PaneReportAgent(_)
             | Method::PaneClearAgentAuthority(_)
@@ -706,6 +710,15 @@ impl App {
                     workspace_id: self.public_workspace_id(ws_idx),
                 },
             });
+            if let Some(tab_id) = self.public_tab_id(ws_idx, self.state.workspaces[ws_idx].active_tab) {
+                self.emit_event(crate::api::schema::EventEnvelope {
+                    event: crate::api::schema::EventKind::TabFocused,
+                    data: crate::api::schema::EventData::TabFocused {
+                        tab_id,
+                        workspace_id: self.public_workspace_id(ws_idx),
+                    },
+                });
+            }
             if let Some(public_pane_id) = self.public_pane_id(ws_idx, pane_id) {
                 self.emit_event(crate::api::schema::EventEnvelope {
                     event: crate::api::schema::EventKind::PaneFocused,
@@ -735,6 +748,11 @@ impl App {
         (ws_idx + 1).to_string()
     }
 
+    fn public_tab_id(&self, ws_idx: usize, tab_idx: usize) -> Option<String> {
+        self.state.workspaces.get(ws_idx)?.tabs.get(tab_idx)?;
+        Some(format!("{}:{}", ws_idx + 1, tab_idx + 1))
+    }
+
     fn public_pane_id(&self, ws_idx: usize, pane_id: crate::layout::PaneId) -> Option<String> {
         let ws = self.state.workspaces.get(ws_idx)?;
         let pane_number = ws.public_pane_number(pane_id)?;
@@ -748,6 +766,22 @@ impl App {
         id.parse::<usize>().ok()?.checked_sub(1)
     }
 
+    fn parse_tab_id(&self, id: &str) -> Option<(usize, usize)> {
+        if let Some(rest) = id.strip_prefix("t_") {
+            let (ws_raw, tab_raw) = rest.split_once('_')?;
+            let ws_idx = ws_raw.parse::<usize>().ok()?.checked_sub(1)?;
+            let tab_idx = tab_raw.parse::<usize>().ok()?.checked_sub(1)?;
+            self.state.workspaces.get(ws_idx)?.tabs.get(tab_idx)?;
+            return Some((ws_idx, tab_idx));
+        }
+
+        let (ws_raw, tab_raw) = id.split_once(':')?;
+        let ws_idx = ws_raw.parse::<usize>().ok()?.checked_sub(1)?;
+        let tab_idx = tab_raw.parse::<usize>().ok()?.checked_sub(1)?;
+        self.state.workspaces.get(ws_idx)?.tabs.get(tab_idx)?;
+        Some((ws_idx, tab_idx))
+    }
+
     fn parse_pane_id(&self, id: &str) -> Option<(usize, crate::layout::PaneId)> {
         if let Some(rest) = id.strip_prefix("p_") {
             if let Some((ws_raw, pane_raw)) = rest.split_once('_') {
@@ -777,7 +811,7 @@ impl App {
 
         use crate::api::schema::{
             ErrorBody, ErrorResponse, Method, PaneListParams, PaneReadResult, ReadSource,
-            ResponseResult, SuccessResponse,
+            ResponseResult, SuccessResponse, TabListParams,
         };
 
         let response = match request.method {
@@ -836,6 +870,12 @@ impl App {
                                 workspace: workspace.clone(),
                             },
                         });
+                        if let Some(tab) = self.tab_info(index, 0) {
+                            self.emit_event(crate::api::schema::EventEnvelope {
+                                event: crate::api::schema::EventKind::TabCreated,
+                                data: crate::api::schema::EventData::TabCreated { tab },
+                            });
+                        }
                         if let Some(pane_id) = self.state.workspaces[index]
                             .layout
                             .pane_ids()
@@ -917,6 +957,13 @@ impl App {
                     .unwrap();
                 };
                 ws.set_custom_name(params.label.clone());
+                self.emit_event(crate::api::schema::EventEnvelope {
+                    event: crate::api::schema::EventKind::WorkspaceRenamed,
+                    data: crate::api::schema::EventData::WorkspaceRenamed {
+                        workspace_id: self.public_workspace_id(index),
+                        label: params.label,
+                    },
+                });
                 SuccessResponse {
                     id: request.id,
                     result: ResponseResult::WorkspaceInfo {
@@ -958,6 +1005,278 @@ impl App {
                     result: ResponseResult::Ok {},
                 }
             }
+            Method::TabList(TabListParams { workspace_id }) => {
+                let tabs = if let Some(workspace_id) = workspace_id {
+                    let Some(ws_idx) = self.parse_workspace_id(&workspace_id) else {
+                        return serde_json::to_string(&ErrorResponse {
+                            id: request.id,
+                            error: ErrorBody {
+                                code: "workspace_not_found".into(),
+                                message: format!("workspace {} not found", workspace_id),
+                            },
+                        })
+                        .unwrap();
+                    };
+                    let Some(ws) = self.state.workspaces.get(ws_idx) else {
+                        return serde_json::to_string(&ErrorResponse {
+                            id: request.id,
+                            error: ErrorBody {
+                                code: "workspace_not_found".into(),
+                                message: format!("workspace {} not found", workspace_id),
+                            },
+                        })
+                        .unwrap();
+                    };
+                    (0..ws.tabs.len())
+                        .filter_map(|tab_idx| self.tab_info(ws_idx, tab_idx))
+                        .collect()
+                } else {
+                    let mut tabs = Vec::new();
+                    for (ws_idx, ws) in self.state.workspaces.iter().enumerate() {
+                        for tab_idx in 0..ws.tabs.len() {
+                            if let Some(tab) = self.tab_info(ws_idx, tab_idx) {
+                                tabs.push(tab);
+                            }
+                        }
+                    }
+                    tabs
+                };
+                SuccessResponse {
+                    id: request.id,
+                    result: ResponseResult::TabList { tabs },
+                }
+            }
+            Method::TabGet(target) => {
+                let Some((ws_idx, tab_idx)) = self.parse_tab_id(&target.tab_id) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                let Some(tab) = self.tab_info(ws_idx, tab_idx) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                SuccessResponse {
+                    id: request.id,
+                    result: ResponseResult::TabInfo { tab },
+                }
+            }
+            Method::TabCreate(params) => {
+                let ws_idx = if let Some(workspace_id) = params.workspace_id {
+                    let Some(ws_idx) = self.parse_workspace_id(&workspace_id) else {
+                        return serde_json::to_string(&ErrorResponse {
+                            id: request.id,
+                            error: ErrorBody {
+                                code: "workspace_not_found".into(),
+                                message: format!("workspace {} not found", workspace_id),
+                            },
+                        })
+                        .unwrap();
+                    };
+                    ws_idx
+                } else if let Some(active) = self.state.active {
+                    active
+                } else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "workspace_not_found".into(),
+                            message: "no active workspace".into(),
+                        },
+                    })
+                    .unwrap();
+                };
+                let cwd = params
+                    .cwd
+                    .map(std::path::PathBuf::from)
+                    .or_else(|| {
+                        self.state.workspaces.get(ws_idx).and_then(|ws| {
+                            ws.active_tab()
+                                .and_then(|tab| tab.focused_runtime())
+                                .and_then(|rt| rt.cwd())
+                        })
+                    })
+                    .or_else(|| std::env::current_dir().ok())
+                    .unwrap_or_else(|| std::path::PathBuf::from("/"));
+                let (rows, cols) = self.state.estimate_pane_size();
+                let result = self
+                    .state
+                    .workspaces
+                    .get_mut(ws_idx)
+                    .ok_or_else(|| std::io::Error::other("workspace disappeared"))
+                    .and_then(|ws| ws.create_tab(rows, cols, cwd));
+                match result {
+                    Ok(tab_idx) => {
+                        if params.focus {
+                            self.state.switch_workspace(ws_idx);
+                            if let Some(ws) = self.state.workspaces.get_mut(ws_idx) {
+                                ws.switch_tab(tab_idx);
+                            }
+                            self.state.mode = Mode::Terminal;
+                        }
+                        let tab = self.tab_info(ws_idx, tab_idx).unwrap();
+                        if let Some(pane_id) = self.state.workspaces[ws_idx].tabs[tab_idx]
+                            .layout
+                            .pane_ids()
+                            .first()
+                            .copied()
+                        {
+                            self.emit_event(crate::api::schema::EventEnvelope {
+                                event: crate::api::schema::EventKind::TabCreated,
+                                data: crate::api::schema::EventData::TabCreated {
+                                    tab: tab.clone(),
+                                },
+                            });
+                            if let Some(pane) = self.pane_info(ws_idx, pane_id) {
+                                self.emit_event(crate::api::schema::EventEnvelope {
+                                    event: crate::api::schema::EventKind::PaneCreated,
+                                    data: crate::api::schema::EventData::PaneCreated { pane },
+                                });
+                            }
+                        }
+                        SuccessResponse {
+                            id: request.id,
+                            result: ResponseResult::TabInfo { tab },
+                        }
+                    }
+                    Err(err) => {
+                        return serde_json::to_string(&ErrorResponse {
+                            id: request.id,
+                            error: ErrorBody {
+                                code: "tab_create_failed".into(),
+                                message: err.to_string(),
+                            },
+                        })
+                        .unwrap();
+                    }
+                }
+            }
+            Method::TabFocus(target) => {
+                let Some((ws_idx, tab_idx)) = self.parse_tab_id(&target.tab_id) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                self.state.switch_workspace(ws_idx);
+                if let Some(ws) = self.state.workspaces.get_mut(ws_idx) {
+                    ws.switch_tab(tab_idx);
+                }
+                let tab = self.tab_info(ws_idx, tab_idx).unwrap();
+                SuccessResponse {
+                    id: request.id,
+                    result: ResponseResult::TabInfo { tab },
+                }
+            }
+            Method::TabRename(params) => {
+                let Some((ws_idx, tab_idx)) = self.parse_tab_id(&params.tab_id) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", params.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                let Some(tab) = self
+                    .state
+                    .workspaces
+                    .get_mut(ws_idx)
+                    .and_then(|ws| ws.tabs.get_mut(tab_idx))
+                else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", params.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                tab.set_custom_name(params.label.clone());
+                self.emit_event(crate::api::schema::EventEnvelope {
+                    event: crate::api::schema::EventKind::TabRenamed,
+                    data: crate::api::schema::EventData::TabRenamed {
+                        tab_id: self.public_tab_id(ws_idx, tab_idx).unwrap(),
+                        workspace_id: self.public_workspace_id(ws_idx),
+                        label: params.label,
+                    },
+                });
+                let tab = self.tab_info(ws_idx, tab_idx).unwrap();
+                SuccessResponse {
+                    id: request.id,
+                    result: ResponseResult::TabInfo { tab },
+                }
+            }
+            Method::TabClose(target) => {
+                let Some((ws_idx, tab_idx)) = self.parse_tab_id(&target.tab_id) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                let Some(ws) = self.state.workspaces.get_mut(ws_idx) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_not_found".into(),
+                            message: format!("tab {} not found", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                };
+                if ws.tabs.len() <= 1 {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_close_failed".into(),
+                            message: "cannot close the last tab in a workspace".into(),
+                        },
+                    })
+                    .unwrap();
+                }
+                if !ws.close_tab(tab_idx) {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "tab_close_failed".into(),
+                            message: format!("tab {} could not be closed", target.tab_id),
+                        },
+                    })
+                    .unwrap();
+                }
+                self.emit_event(crate::api::schema::EventEnvelope {
+                    event: crate::api::schema::EventKind::TabClosed,
+                    data: crate::api::schema::EventData::TabClosed {
+                        tab_id: target.tab_id,
+                        workspace_id: self.public_workspace_id(ws_idx),
+                    },
+                });
+                SuccessResponse {
+                    id: request.id,
+                    result: ResponseResult::Ok {},
+                }
+            }
             Method::PaneSplit(params) => {
                 let Some((ws_idx, target_pane_id)) = self.parse_pane_id(&params.target_pane_id)
                 else {
@@ -1083,6 +1402,16 @@ impl App {
                     })
                     .unwrap();
                 };
+                let Some(tab_idx) = self.state.workspaces.get(ws_idx).and_then(|ws| ws.find_tab_index_for_pane(pane_id)) else {
+                    return serde_json::to_string(&ErrorResponse {
+                        id: request.id,
+                        error: ErrorBody {
+                            code: "pane_not_found".into(),
+                            message: format!("pane {} not found", params.pane_id),
+                        },
+                    })
+                    .unwrap();
+                };
                 let requested_lines = params.lines.unwrap_or(80).min(1000) as usize;
                 let text = match params.source {
                     ReadSource::Visible => pane.visible_text(),
@@ -1094,6 +1423,7 @@ impl App {
                         read: PaneReadResult {
                             pane_id: params.pane_id,
                             workspace_id,
+                            tab_id: self.public_tab_id(ws_idx, tab_idx).unwrap(),
                             source: params.source,
                             text,
                             revision: 0,
@@ -1557,6 +1887,26 @@ impl App {
         }
     }
 
+    fn tab_info(&self, ws_idx: usize, tab_idx: usize) -> Option<crate::api::schema::TabInfo> {
+        let ws = self.state.workspaces.get(ws_idx)?;
+        let tab = ws.tabs.get(tab_idx)?;
+        let (agg_state, _) = tab
+            .panes
+            .values()
+            .map(|pane| (pane.state, pane.seen))
+            .max_by_key(|(state, seen)| tab_attention_priority(*state, *seen))
+            .unwrap_or((crate::detect::AgentState::Unknown, true));
+        Some(crate::api::schema::TabInfo {
+            tab_id: self.public_tab_id(ws_idx, tab_idx)?,
+            workspace_id: self.public_workspace_id(ws_idx),
+            number: tab_idx + 1,
+            label: tab.display_name(),
+            focused: self.state.active == Some(ws_idx) && ws.active_tab == tab_idx,
+            pane_count: tab.panes.len(),
+            agent_state: pane_agent_state(agg_state),
+        })
+    }
+
     fn pane_info(
         &self,
         ws_idx: usize,
@@ -1565,13 +1915,16 @@ impl App {
         let ws = self.state.workspaces.get(ws_idx)?;
         let pane = ws.pane_state(pane_id)?;
         let runtime = ws.runtime(pane_id);
+        let tab_idx = ws.find_tab_index_for_pane(pane_id)?;
         let focused = self.state.active == Some(ws_idx)
+            && ws.active_tab == tab_idx
             && ws
                 .focused_pane_id()
                 .is_some_and(|focused| focused == pane_id);
         Some(crate::api::schema::PaneInfo {
             pane_id: self.public_pane_id(ws_idx, pane_id)?,
             workspace_id: self.public_workspace_id(ws_idx),
+            tab_id: self.public_tab_id(ws_idx, tab_idx)?,
             focused,
             cwd: runtime
                 .and_then(|rt| rt.cwd())
@@ -1614,11 +1967,23 @@ impl App {
             label: ws.display_name(),
             focused: self.state.active == Some(index),
             pane_count: ws.public_pane_numbers.len(),
+            tab_count: ws.tabs.len(),
+            active_tab_id: self.public_tab_id(index, ws.active_tab).unwrap_or_else(|| format!("{}:{}", index + 1, ws.active_tab + 1)),
             agent_state: pane_agent_state(agg_state),
         }
     }
 }
 
+fn tab_attention_priority(state: crate::detect::AgentState, seen: bool) -> u8 {
+    match (state, seen) {
+        (crate::detect::AgentState::Blocked, _) => 4,
+        (crate::detect::AgentState::Idle, false) => 3,
+        (crate::detect::AgentState::Working, _) => 2,
+        (crate::detect::AgentState::Idle, true) => 1,
+        (crate::detect::AgentState::Unknown, _) => 0,
+    }
+}
+
 fn parse_api_key(key: &str) -> Option<crossterm::event::KeyEvent> {
     use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
 
diff --git a/src/cli.rs b/src/cli.rs
index d13f059e..30f11a0e 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -8,8 +8,8 @@ use crate::api;
 use crate::api::schema::{
     EmptyParams, Method, OutputMatch, PaneAgentState, PaneListParams, PaneReadParams,
     PaneSendKeysParams, PaneSendTextParams, PaneSplitParams, PaneTarget, PaneWaitForOutputParams,
-    ReadSource, Request, SplitDirection, Subscription, WorkspaceCreateParams,
-    WorkspaceRenameParams, WorkspaceTarget,
+    ReadSource, Request, SplitDirection, Subscription, TabCreateParams, TabListParams, TabRenameParams,
+    TabTarget, WorkspaceCreateParams, WorkspaceRenameParams, WorkspaceTarget,
 };
 
 pub enum CommandOutcome {
@@ -24,6 +24,7 @@ pub fn maybe_run(args: &[String]) -> std::io::Result<CommandOutcome> {
 
     let exit_code = match command {
         "workspace" => run_workspace_command(&args[2..])?,
+        "tab" => run_tab_command(&args[2..])?,
         "pane" => run_pane_command(&args[2..])?,
         "wait" => run_wait_command(&args[2..])?,
         "integration" => run_integration_command(&args[2..])?,
@@ -53,6 +54,26 @@ fn run_workspace_command(args: &[String]) -> std::io::Result<i32> {
     }
 }
 
+fn run_tab_command(args: &[String]) -> std::io::Result<i32> {
+    let Some(subcommand) = args.first().map(|arg| arg.as_str()) else {
+        print_tab_help();
+        return Ok(2);
+    };
+
+    match subcommand {
+        "list" => tab_list(&args[1..]),
+        "create" => tab_create(&args[1..]),
+        "get" => tab_get(&args[1..]),
+        "focus" => tab_focus(&args[1..]),
+        "rename" => tab_rename(&args[1..]),
+        "close" => tab_close(&args[1..]),
+        _ => {
+            print_tab_help();
+            Ok(2)
+        }
+    }
+}
+
 fn run_pane_command(args: &[String]) -> std::io::Result<i32> {
     let Some(subcommand) = args.first().map(|arg| arg.as_str()) else {
         print_pane_help();
@@ -220,6 +241,147 @@ fn workspace_close(args: &[String]) -> std::io::Result<i32> {
     })?)
 }
 
+fn tab_list(args: &[String]) -> std::io::Result<i32> {
+    let mut workspace_id = None;
+
+    let mut index = 0;
+    while index < args.len() {
+        match args[index].as_str() {
+            "--workspace" => {
+                let Some(value) = args.get(index + 1) else {
+                    eprintln!("missing value for --workspace");
+                    return Ok(2);
+                };
+                workspace_id = Some(normalize_workspace_id(value));
+                index += 2;
+            }
+            other => {
+                eprintln!("unknown option: {other}");
+                return Ok(2);
+            }
+        }
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:list".into(),
+        method: Method::TabList(TabListParams { workspace_id }),
+    })?)
+}
+
+fn tab_create(args: &[String]) -> std::io::Result<i32> {
+    let mut workspace_id = None;
+    let mut cwd = None;
+    let mut focus = true;
+
+    let mut index = 0;
+    while index < args.len() {
+        match args[index].as_str() {
+            "--workspace" => {
+                let Some(value) = args.get(index + 1) else {
+                    eprintln!("missing value for --workspace");
+                    return Ok(2);
+                };
+                workspace_id = Some(normalize_workspace_id(value));
+                index += 2;
+            }
+            "--cwd" => {
+                let Some(value) = args.get(index + 1) else {
+                    eprintln!("missing value for --cwd");
+                    return Ok(2);
+                };
+                cwd = Some(value.clone());
+                index += 2;
+            }
+            "--no-focus" => {
+                focus = false;
+                index += 1;
+            }
+            other => {
+                eprintln!("unknown option: {other}");
+                return Ok(2);
+            }
+        }
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:create".into(),
+        method: Method::TabCreate(TabCreateParams {
+            workspace_id,
+            cwd,
+            focus,
+        }),
+    })?)
+}
+
+fn tab_get(args: &[String]) -> std::io::Result<i32> {
+    let Some(raw_tab_id) = args.first() else {
+        eprintln!("usage: herdr tab get <tab_id>");
+        return Ok(2);
+    };
+    if args.len() != 1 {
+        eprintln!("usage: herdr tab get <tab_id>");
+        return Ok(2);
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:get".into(),
+        method: Method::TabGet(TabTarget {
+            tab_id: normalize_tab_id(raw_tab_id),
+        }),
+    })?)
+}
+
+fn tab_focus(args: &[String]) -> std::io::Result<i32> {
+    let Some(raw_tab_id) = args.first() else {
+        eprintln!("usage: herdr tab focus <tab_id>");
+        return Ok(2);
+    };
+    if args.len() != 1 {
+        eprintln!("usage: herdr tab focus <tab_id>");
+        return Ok(2);
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:focus".into(),
+        method: Method::TabFocus(TabTarget {
+            tab_id: normalize_tab_id(raw_tab_id),
+        }),
+    })?)
+}
+
+fn tab_rename(args: &[String]) -> std::io::Result<i32> {
+    if args.len() < 2 {
+        eprintln!("usage: herdr tab rename <tab_id> <label>");
+        return Ok(2);
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:rename".into(),
+        method: Method::TabRename(TabRenameParams {
+            tab_id: normalize_tab_id(&args[0]),
+            label: args[1..].join(" "),
+        }),
+    })?)
+}
+
+fn tab_close(args: &[String]) -> std::io::Result<i32> {
+    let Some(raw_tab_id) = args.first() else {
+        eprintln!("usage: herdr tab close <tab_id>");
+        return Ok(2);
+    };
+    if args.len() != 1 {
+        eprintln!("usage: herdr tab close <tab_id>");
+        return Ok(2);
+    }
+
+    print_response(&send_request(&Request {
+        id: "cli:tab:close".into(),
+        method: Method::TabClose(TabTarget {
+            tab_id: normalize_tab_id(raw_tab_id),
+        }),
+    })?)
+}
+
 fn pane_list(args: &[String]) -> std::io::Result<i32> {
     let mut workspace_id = None;
 
@@ -832,6 +994,10 @@ fn normalize_workspace_id(value: &str) -> String {
     value.to_string()
 }
 
+fn normalize_tab_id(value: &str) -> String {
+    value.to_string()
+}
+
 fn normalize_pane_id(value: &str) -> String {
     value.to_string()
 }
@@ -890,6 +1056,16 @@ fn print_workspace_help() {
     eprintln!("  herdr workspace close <workspace_id>");
 }
 
+fn print_tab_help() {
+    eprintln!("herdr tab commands:");
+    eprintln!("  herdr tab list [--workspace <workspace_id>]");
+    eprintln!("  herdr tab create [--workspace <workspace_id>] [--cwd PATH] [--no-focus]");
+    eprintln!("  herdr tab get <tab_id>");
+    eprintln!("  herdr tab focus <tab_id>");
+    eprintln!("  herdr tab rename <tab_id> <label>");
+    eprintln!("  herdr tab close <tab_id>");
+}
+
 fn print_pane_help() {
     eprintln!("herdr pane commands:");
     eprintln!("  herdr pane list [--workspace <workspace_id>]");
diff --git a/src/main.rs b/src/main.rs
index 4d0a9442..385f6f5f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -197,6 +197,7 @@ fn main() -> io::Result<()> {
         println!("Usage: herdr [options]");
         println!("       herdr update");
         println!("       herdr workspace <subcommand> ...");
+        println!("       herdr tab <subcommand> ...");
         println!("       herdr pane <subcommand> ...");
         println!("       herdr wait <subcommand> ...");
         println!("       herdr integration <subcommand> ...");
@@ -204,6 +205,7 @@ fn main() -> io::Result<()> {
         println!("Commands:");
         println!("  update              Download and install the latest version");
         println!("  workspace           workspace helpers over the socket api");
+        println!("  tab                 tab helpers over the socket api");
         println!("  pane                pane control helpers over the socket api");
         println!("  wait                blocking wait helpers over the socket api");
         println!("  integration         manage built-in agent integrations");
diff --git a/tests/api_ping.rs b/tests/api_ping.rs
index 6b7cbf24..94e1e3f9 100644
--- a/tests/api_ping.rs
+++ b/tests/api_ping.rs
@@ -230,6 +230,8 @@ fn workspace_list_and_create_round_trip() {
     assert_eq!(created["result"]["workspace"]["workspace_id"], "1");
     assert_eq!(created["result"]["workspace"]["number"], 1);
     assert_eq!(created["result"]["workspace"]["focused"], true);
+    assert_eq!(created["result"]["workspace"]["tab_count"], 1);
+    assert_eq!(created["result"]["workspace"]["active_tab_id"], "1:1");
 
     let listed = send_request(
         &socket_path,
@@ -252,6 +254,7 @@ fn workspace_list_and_create_round_trip() {
     let panes = panes["result"]["panes"].as_array().unwrap();
     assert_eq!(panes.len(), 1);
     assert_eq!(panes[0]["workspace_id"], "1");
+    assert_eq!(panes[0]["tab_id"], "1:1");
     let pane_id = panes[0]["pane_id"].as_str().unwrap().to_string();
 
     let pane = send_request(
@@ -271,6 +274,7 @@ fn workspace_list_and_create_round_trip() {
         ),
     );
     assert_eq!(read["result"]["read"]["pane_id"], pane_id);
+    assert_eq!(read["result"]["read"]["tab_id"], "1:1");
     assert!(read["result"]["read"]["text"].is_string());
 
     let send_text = send_request(
@@ -347,6 +351,72 @@ fn workspace_list_and_create_round_trip() {
 
 #[cfg(not(target_os = "macos"))]
 #[test]
+fn tab_methods_round_trip_over_socket() {
+    let _lock = test_lock();
+    let base = unique_test_dir();
+    let config_home = base.join("config");
+    let runtime_dir = base.join("runtime");
+    let socket_path = runtime_dir.join("herdr.sock");
+
+    let child = spawn_herdr(&config_home, &runtime_dir, &socket_path);
+    wait_for_socket(&socket_path, Duration::from_secs(5));
+
+    let created = send_request(
+        &socket_path,
+        &format!(
+            r#"{{"id":"req_t1","method":"workspace.create","params":{{"cwd":"{}","focus":true}}}}"#,
+            base.display()
+        ),
+    );
+    assert_eq!(created["result"]["workspace"]["active_tab_id"], "1:1");
+
+    let tab_created = send_request(
+        &socket_path,
+        r#"{"id":"req_t2","method":"tab.create","params":{"workspace_id":"1","focus":true}}"#,
+    );
+    assert_eq!(tab_created["result"]["type"], "tab_info");
+    assert_eq!(tab_created["result"]["tab"]["tab_id"], "1:2");
+    assert_eq!(tab_created["result"]["tab"]["focused"], true);
+
+    let tab_list = send_request(
+        &socket_path,
+        r#"{"id":"req_t3","method":"tab.list","params":{"workspace_id":"1"}}"#,
+    );
+    let tabs = tab_list["result"]["tabs"].as_array().unwrap();
+    assert_eq!(tabs.len(), 2);
+    assert_eq!(tabs[0]["tab_id"], "1:1");
+    assert_eq!(tabs[1]["tab_id"], "1:2");
+
+    let tab_get = send_request(
+        &socket_path,
+        r#"{"id":"req_t4","method":"tab.get","params":{"tab_id":"1:2"}}"#,
+    );
+    assert_eq!(tab_get["result"]["tab"]["tab_id"], "1:2");
+
+    let renamed = send_request(
+        &socket_path,
+        r#"{"id":"req_t5","method":"tab.rename","params":{"tab_id":"1:2","label":"logs"}}"#,
+    );
+    assert_eq!(renamed["result"]["tab"]["label"], "logs");
+
+    let focused = send_request(
+        &socket_path,
+        r#"{"id":"req_t6","method":"tab.focus","params":{"tab_id":"1:1"}}"#,
+    );
+    assert_eq!(focused["result"]["tab"]["tab_id"], "1:1");
+    assert_eq!(focused["result"]["tab"]["focused"], true);
+
+    let closed = send_request(
+        &socket_path,
+        r#"{"id":"req_t7","method":"tab.close","params":{"tab_id":"1:2"}}"#,
+    );
+    assert_eq!(closed["result"]["type"], "ok");
+
+    cleanup_spawned_herdr(child, base);
+}
+
+#[cfg(not(target_os = "macos"))]
+#[test]
 fn events_subscribe_streams_lifecycle_and_agent_events() {
     let _lock = test_lock();
     let base = unique_test_dir();
@@ -382,7 +452,7 @@ fn events_subscribe_streams_lifecycle_and_agent_events() {
 
     let mut reader = open_subscription(
         &socket_path,
-        r#"{"id":"sub_life","method":"events.subscribe","params":{"subscriptions":[{"type":"workspace.created"},{"type":"workspace.focused"},{"type":"pane.created"},{"type":"pane.focused"},{"type":"pane.agent_detected"},{"type":"pane.closed"},{"type":"workspace.closed"}]}}"#,
+        r#"{"id":"sub_life","method":"events.subscribe","params":{"subscriptions":[{"type":"workspace.created"},{"type":"workspace.focused"},{"type":"tab.created"},{"type":"tab.focused"},{"type":"tab.renamed"},{"type":"tab.closed"},{"type":"pane.created"},{"type":"pane.focused"},{"type":"pane.agent_detected"},{"type":"pane.closed"},{"type":"workspace.closed"}]}}"#,
     );
 
     let ack = reader.read_json_line(Duration::from_secs(2));
@@ -410,6 +480,10 @@ fn events_subscribe_streams_lifecycle_and_agent_events() {
     let workspace_focused =
         wait_for_event(&mut reader, "workspace_focused", Duration::from_secs(2));
     assert_eq!(workspace_focused["data"]["workspace_id"], workspace_id);
+    let tab_created = wait_for_event(&mut reader, "tab_created", Duration::from_secs(2));
+    assert_eq!(tab_created["data"]["tab"]["tab_id"], "1:1");
+    let tab_focused = wait_for_event(&mut reader, "tab_focused", Duration::from_secs(2));
+    assert_eq!(tab_focused["data"]["tab_id"], "1:1");
     let pane_created = wait_for_event(&mut reader, "pane_created", Duration::from_secs(2));
     let pane_id = pane_created["data"]["pane"]["pane_id"]
         .as_str()
@@ -439,13 +513,32 @@ fn events_subscribe_streams_lifecycle_and_agent_events() {
     assert_eq!(agent_detected["data"]["pane_id"], pane_id);
     assert_eq!(agent_detected["data"]["agent"], "pi");
 
-    let split = send_request(
+    let new_tab = send_request(
         &socket_path,
         &format!(
-            r#"{{"id":"req_l4","method":"pane.split","params":{{"target_pane_id":"{}","direction":"right","focus":true}}}}"#,
-            pane_id
+            r#"{{"id":"req_l4","method":"tab.create","params":{{"workspace_id":"{}","focus":true}}}}"#,
+            workspace_id
         ),
     );
+    assert_eq!(new_tab["result"]["tab"]["tab_id"], "1:2");
+    let created_tab_event = wait_for_event(&mut reader, "tab_created", Duration::from_secs(2));
+    assert_eq!(created_tab_event["data"]["tab"]["tab_id"], "1:2");
+    let focused_tab_event = wait_for_event(&mut reader, "tab_focused", Duration::from_secs(2));
+    assert_eq!(focused_tab_event["data"]["tab_id"], "1:2");
+
+    let renamed_tab = send_request(
+        &socket_path,
+        r#"{"id":"req_l5","method":"tab.rename","params":{"tab_id":"1:2","label":"logs"}}"#,
+    );
+    assert_eq!(renamed_tab["result"]["tab"]["label"], "logs");
+    let renamed_event = wait_for_event(&mut reader, "tab_renamed", Duration::from_secs(2));
+    assert_eq!(renamed_event["data"]["tab_id"], "1:2");
+    assert_eq!(renamed_event["data"]["label"], "logs");
+
+    let split = send_request(
+        &socket_path,
+        r#"{"id":"req_l6","method":"pane.split","params":{"target_pane_id":"1-2","direction":"right","focus":true}}"#,
+    );
     let split_pane_id = split["result"]["pane"]["pane_id"]
         .as_str()
         .unwrap()
@@ -456,7 +549,7 @@ fn events_subscribe_streams_lifecycle_and_agent_events() {
     let closed = send_request(
         &socket_path,
         &format!(
-            r#"{{"id":"req_l5","method":"pane.close","params":{{"pane_id":"{}"}}}}"#,
+            r#"{{"id":"req_l7","method":"pane.close","params":{{"pane_id":"{}"}}}}"#,
             split_pane_id
         ),
     );
@@ -464,10 +557,18 @@ fn events_subscribe_streams_lifecycle_and_agent_events() {
     let pane_closed = wait_for_event(&mut reader, "pane_closed", Duration::from_secs(2));
     assert_eq!(pane_closed["data"]["pane_id"], split_pane_id);
 
+    let closed_tab = send_request(
+        &socket_path,
+        r#"{"id":"req_l8","method":"tab.close","params":{"tab_id":"1:2"}}"#,
+    );
+    assert_eq!(closed_tab["result"]["type"], "ok");
+    let tab_closed = wait_for_event(&mut reader, "tab_closed", Duration::from_secs(2));
+    assert_eq!(tab_closed["data"]["tab_id"], "1:2");
+
     let closed_ws = send_request(
         &socket_path,
         &format!(
-            r#"{{"id":"req_l6","method":"workspace.close","params":{{"workspace_id":"{}"}}}}"#,
+            r#"{{"id":"req_l9","method":"workspace.close","params":{{"workspace_id":"{}"}}}}"#,
             workspace_id
         ),
     );
diff --git a/tests/cli_wrapper.rs b/tests/cli_wrapper.rs
index 37c4406e..0f90baa2 100644
--- a/tests/cli_wrapper.rs
+++ b/tests/cli_wrapper.rs
@@ -200,6 +200,55 @@ fn workspace_and_pane_management_commands_work() {
 }
 
 #[test]
+fn tab_management_commands_work() {
+    let base = unique_test_dir();
+    let config_home = base.join("config");
+    let runtime_dir = base.join("runtime");
+    let socket_path = runtime_dir.join("herdr.sock");
+
+    let herdr = spawn_herdr(&config_home, &runtime_dir, &socket_path);
+    wait_for_socket(&socket_path, Duration::from_secs(5));
+
+    let created = run_cli(
+        &socket_path,
+        &["workspace", "create", "--cwd", base.to_str().unwrap()],
+    );
+    assert!(created.status.success());
+
+    let created_tab = run_cli(&socket_path, &["tab", "create", "--workspace", "1"]);
+    assert!(created_tab.status.success());
+    let created_tab_json: serde_json::Value = serde_json::from_slice(&created_tab.stdout).unwrap();
+    assert_eq!(created_tab_json["result"]["tab"]["tab_id"], "1:2");
+
+    let listed_tabs = run_cli(&socket_path, &["tab", "list", "--workspace", "1"]);
+    assert!(listed_tabs.status.success());
+    let listed_tabs_json: serde_json::Value = serde_json::from_slice(&listed_tabs.stdout).unwrap();
+    assert_eq!(listed_tabs_json["result"]["tabs"].as_array().unwrap().len(), 2);
+
+    let renamed_tab = run_cli(&socket_path, &["tab", "rename", "1:2", "logs"]);
+    assert!(renamed_tab.status.success());
+    let renamed_tab_json: serde_json::Value = serde_json::from_slice(&renamed_tab.stdout).unwrap();
+    assert_eq!(renamed_tab_json["result"]["tab"]["label"], "logs");
+
+    let focused_tab = run_cli(&socket_path, &["tab", "focus", "1:1"]);
+    assert!(focused_tab.status.success());
+    let focused_tab_json: serde_json::Value = serde_json::from_slice(&focused_tab.stdout).unwrap();
+    assert_eq!(focused_tab_json["result"]["tab"]["tab_id"], "1:1");
+
+    let tab_get = run_cli(&socket_path, &["tab", "get", "1:2"]);
+    assert!(tab_get.status.success());
+    let tab_get_json: serde_json::Value = serde_json::from_slice(&tab_get.stdout).unwrap();
+    assert_eq!(tab_get_json["result"]["tab"]["tab_id"], "1:2");
+
+    let closed_tab = run_cli(&socket_path, &["tab", "close", "1:2"]);
+    assert!(closed_tab.status.success());
+    let closed_tab_json: serde_json::Value = serde_json::from_slice(&closed_tab.stdout).unwrap();
+    assert_eq!(closed_tab_json["result"]["type"], "ok");
+
+    cleanup_spawned_herdr(herdr, base);
+}
+
+#[test]
 fn pane_run_read_and_wait_commands_work() {
     let base = unique_test_dir();
     let config_home = base.join("config");