feat: add pane metadata reporting

refs #36

3 files changed, 60 insertions, 2 deletions

diff --git a/docs/next/website/src/content/docs/cli-reference.mdx b/docs/next/website/src/content/docs/cli-reference.mdx
index b1619977..7504bd82 100644
--- a/docs/next/website/src/content/docs/cli-reference.mdx
+++ b/docs/next/website/src/content/docs/cli-reference.mdx
@@ -132,6 +132,24 @@ herdr pane report-agent <pane_id> \
   [--seq N]
 ```
 
+Report display-only pane metadata without taking over semantic state:
+
+```bash
+herdr pane report-metadata <pane_id> \
+  --source ID \
+  [--agent LABEL] \
+  [--applies-to-source ID] \
+  [--title TEXT|--clear-title] \
+  [--display-agent TEXT|--clear-display-agent] \
+  [--custom-status TEXT|--clear-custom-status] \
+  [--state-label STATUS=TEXT] \
+  [--clear-state-labels] \
+  [--seq N] \
+  [--ttl-ms N]
+```
+
+`STATUS` is one of `idle`, `working`, `blocked`, `done`, or `unknown`. `--agent` is a guard for the authoritative agent label. `--applies-to-source` is a guard for the active lifecycle authority source. Use `--display-agent` to change the visible name.
+
 ## Agents
 
 ```bash
diff --git a/docs/next/website/src/content/docs/integrations.mdx b/docs/next/website/src/content/docs/integrations.mdx
index 86496266..5f62face 100644
--- a/docs/next/website/src/content/docs/integrations.mdx
+++ b/docs/next/website/src/content/docs/integrations.mdx
@@ -143,7 +143,21 @@ herdr pane report-agent 1-1 \
   --custom-status indexing
 ```
 
-Custom status is visual-only. Waits, notifications, and workspace rollups still use the semantic state.
+User hooks that run next to a Herdr-managed integration should use metadata instead of `report-agent`. Metadata changes presentation without taking over the integration's `idle`, `working`, `blocked`, or session restore authority. `--agent` guards the report so it only applies while that authoritative agent is active. `--applies-to-source` guards the report so it only applies while that lifecycle authority source is active. `--display-agent` changes the visible name.
+
+```bash
+herdr pane report-metadata "$HERDR_PANE_ID" \
+  --source user:claude-title \
+  --agent claude \
+  --applies-to-source herdr:claude \
+  --title "Refactor auth middleware" \
+  --display-agent "Claude: auth" \
+  --custom-status "refactor auth" \
+  --state-label working="deep in the mines" \
+  --ttl-ms 3600000
+```
+
+Custom status and state labels are visual-only. Waits, notifications, and workspace rollups still use the semantic state.
 
 ## Debug integration state
 
diff --git a/docs/next/website/src/content/docs/socket-api.mdx b/docs/next/website/src/content/docs/socket-api.mdx
index 4d32817e..8fd03564 100644
--- a/docs/next/website/src/content/docs/socket-api.mdx
+++ b/docs/next/website/src/content/docs/socket-api.mdx
@@ -73,7 +73,7 @@ Raw socket method names use dot notation:
 | Workspace | `workspace.create`, `workspace.list`, `workspace.get`, `workspace.focus`, `workspace.rename`, `workspace.close` |
 | Worktree | `worktree.list`, `worktree.create`, `worktree.open`, `worktree.remove` |
 | Tab | `tab.create`, `tab.list`, `tab.get`, `tab.focus`, `tab.rename`, `tab.close` |
-| Pane | `pane.split`, `pane.list`, `pane.get`, `pane.rename`, `pane.send_text`, `pane.send_keys`, `pane.send_input`, `pane.read`, `pane.report_agent`, `pane.clear_agent_authority`, `pane.release_agent`, `pane.close`, `pane.wait_for_output` |
+| Pane | `pane.split`, `pane.list`, `pane.get`, `pane.rename`, `pane.send_text`, `pane.send_keys`, `pane.send_input`, `pane.read`, `pane.report_agent`, `pane.report_metadata`, `pane.clear_agent_authority`, `pane.release_agent`, `pane.close`, `pane.wait_for_output` |
 | Agent | `agent.list`, `agent.get`, `agent.read`, `agent.send`, `agent.rename`, `agent.focus`, `agent.start` |
 | Events | `events.subscribe`, `events.wait` |
 | Integrations | `integration.install`, `integration.uninstall` |
@@ -163,6 +163,32 @@ Integrations report agent state with `pane.report_agent`.
 
 `custom_status` is visual. It can show a short label like `indexing` without changing semantic behavior.
 
+Use `pane.report_metadata` when a user hook wants to customize presentation without taking over lifecycle state from a Herdr integration.
+
+```json
+{
+  "id": "req_2",
+  "method": "pane.report_metadata",
+  "params": {
+    "pane_id": "1-1",
+    "source": "user:claude-title",
+    "agent": "claude",
+    "applies_to_source": "herdr:claude",
+    "title": "Refactor auth middleware",
+    "display_agent": "Claude: auth",
+    "custom_status": "refactor auth",
+    "state_labels": {
+      "working": "deep in the mines",
+      "idle": "DIED",
+      "done": "LOOK HERE MF"
+    },
+    "ttl_ms": 3600000
+  }
+}
+```
+
+Metadata reports are display-only. Valid metadata can override the pane title, displayed agent name, compact custom status, and visible state labels. `working`, `blocked`, `idle`, waits, notifications, session restore, and rollups still come from the active agent state report. `agent` is an optional guard for the authoritative agent label; `applies_to_source` is an optional guard for the active lifecycle authority source. Use `display_agent` to change the visible name. `state_labels` keys must be `idle`, `working`, `blocked`, `done`, or `unknown`. Use clear fields such as `clear_custom_status: true` with the same `source` to remove one presentation override.
+
 ## Event subscriptions
 
 Subscribe to events when you need a long-lived stream: