Feat v0.3.6 demo workflows + interactive demo

Four example workflow packages proving the engine end-to-end:
- Bug Report Triage: public entry, branch routing, SLA timer
- Employee Onboarding: Starlark automated stages, signoff gate
- Content Approval: multi-party signoff, revision cycle loop
- Webhook Notifier: http.post, connections fallback, delivery logging

Demo surface at /s/workflow-demo with cards, stage diagrams, Starlark
viewer, API examples, active/published status, and copyable public links.

Engine fixes: started_by in automated context, sla_seconds in package
installer, parseSnapshotStages for wrapped/legacy formats.

Platform fixes: extension SDK boot in base.html (Preact globals + boot()),
admin teams paginated response extraction, workflow adoption endpoint
(POST /teams/:teamId/workflows/:id/adopt), team-admin copyable link.

Review pass remains on roadmap for remaining UI polish.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/webhook-notifier/README.md

@@ -0,0 +1,30 @@
+# Webhook Notifier
+
+Outbound webhook delivery with connection credentials and delivery logging.
+
+## Features
+
+- **Starlark `http.post`** — outbound HTTP with custom headers
+- **`connections.get`** — fallback to stored webhook connection credentials
+- **Delivery logging** — records URL, status code, event to `webhook_log` ext_data table
+- **Result review** — delivery status shown in final review stage
+
+## Stage Flow
+
+```
+[configure]  →  [fire-webhook]  →  [result]
+    team          automated          review
+                  (http.post)
+```
+
+## Starlark Hook
+
+- **`on_fire(ctx)`** — Posts JSON payload to webhook URL, falls back to `connections.get("webhook")`, logs delivery to `webhook_log`
+
+## Installation
+
+```bash
+curl -X POST $BASE/api/v1/admin/packages/install \
+  -H "Authorization: Bearer $TOKEN" \
+  -F "file=@packages/webhook-notifier"
+```

packages/webhook-notifier/manifest.json

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+{
+  "id": "webhook-notifier",
+  "title": "Webhook Notifier",
+  "type": "workflow",
+  "version": "0.1.0",
+  "tier": "starlark",
+  "icon": "🔔",
+  "author": "Switchboard Core",
+  "description": "Outbound webhook delivery with connection credential support and delivery logging.",
+  "permissions": ["api.http", "connections.read", "db.write"],
+
+  "db_tables": {
+    "webhook_log": {
+      "columns": {
+        "url": "text",
+        "status_code": "text",
+        "event": "text",
+        "instance_id": "text"
+      }
+    }
+  },
+
+  "workflow_definition": {
+    "name": "Webhook Notifier",
+    "slug": "webhook-notifier",
+    "entry_mode": "team_only",
+    "stages": [
+      {
+        "name": "configure",
+        "ordinal": 0,
+        "stage_mode": "form",
+        "audience": "team",
+        "stage_type": "simple",
+        "auto_transition": false,
+        "form_template": {
+          "fieldsets": [
+            {
+              "label": "Webhook Configuration",
+              "fields": [
+                { "key": "webhook_url", "label": "Webhook URL", "type": "text", "required": true },
+                { "key": "event_name", "label": "Event Name", "type": "text", "required": true },
+                { "key": "payload", "label": "Custom Payload (JSON)", "type": "textarea" }
+              ]
+            }
+          ]
+        }
+      },
+      {
+        "name": "fire-webhook",
+        "ordinal": 1,
+        "stage_mode": "automated",
+        "audience": "system",
+        "stage_type": "automated",
+        "auto_transition": true,
+        "starlark_hook": "webhook-notifier:on_fire"
+      },
+      {
+        "name": "result",
+        "ordinal": 2,
+        "stage_mode": "review",
+        "audience": "team",
+        "stage_type": "simple",
+        "auto_transition": false,
+        "form_template": {
+          "fieldsets": [
+            {
+              "label": "Delivery Result",
+              "fields": [
+                { "key": "delivery_status", "label": "Status", "type": "text" },
+                { "key": "status_code", "label": "HTTP Status Code", "type": "text" },
+                { "key": "response_body", "label": "Response", "type": "textarea" }
+              ]
+            }
+          ]
+        }
+      }
+    ]
+  }
+}

packages/webhook-notifier/script.star

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+def on_fire(ctx):
+    """Fire outbound webhook with optional connection credentials."""
+    data = ctx["stage_data"]
+    url = data.get("webhook_url", "")
+
+    # Fallback to configured connection
+    if not url:
+        conn = connections.get("webhook")
+        if conn:
+            url = conn.get("url", "")
+
+    if not url:
+        return {"error": "No webhook URL configured"}
+
+    payload = json.encode({
+        "event": data.get("event_name", "workflow.notify"),
+        "instance_id": ctx["instance_id"],
+        "workflow_id": ctx["workflow_id"],
+        "data": data,
+    })
+
+    resp = http.post(url, body=payload, headers={
+        "Content-Type": "application/json",
+        "X-Switchboard-Event": data.get("event_name", "workflow.notify"),
+    })
+
+    # Log the delivery
+    db.insert("webhook_log", {
+        "url": url,
+        "status_code": str(resp["status"]),
+        "event": data.get("event_name", ""),
+        "instance_id": ctx["instance_id"],
+    })
+
+    status = "delivered" if int(resp["status"]) < 400 else "failed"
+
+    return {"advance": True, "data": {
+        "delivery_status": status,
+        "status_code": str(resp["status"]),
+        "response_body": resp["body"][:500],
+    }}