feat(agentctl): headless channel webhook create and execute

Add guildWebhooksMin assert, token capture from channel-webhook-created
sidecar, and create/execute headless steps for Phase 429 scenarios.

Co-authored-by: Cursor <[email protected]>

assert.js

@@ -166,6 +166,10 @@ function matchView (view, spec) {
       if (String(view?.auditLogExportFilter || '') !== String(expected)) return false
       continue
     }
+    if (key === 'guildWebhooksMin') {
+      if ((view?.guildWebhooks || []).length < Number(expected)) return false
+      continue
+    }
     if (key === 'auditLogIncludesAction') {
       const needle = String(expected)
       const hit = (view?.auditLog || []).some((e) =>

headless.js

@@ -28,6 +28,7 @@ class HeadlessSession {
     this._lastInboxNotificationId = null
     this._lastStagedAttachmentId = null
     this._lastStagedStickerName = null
+    this._lastWebhookToken = null
   }
 
   get lastView () {
@@ -462,8 +463,40 @@ class HeadlessSession {
         if (!matched) {
           throw new Error(`headless wait-event timeout: ${JSON.stringify(step.waitEvent)}`)
         }
+        if (matched.type === 'channel-webhook-created' && matched.token) {
+          this._lastWebhookToken = matched.token
+        }
         results.push({ waitEvent: step.waitEvent, payload: matched })
       }
+      if (step.createWebhookActiveChannel) {
+        const spec =
+          step.createWebhookActiveChannel && typeof step.createWebhookActiveChannel === 'object'
+            ? step.createWebhookActiveChannel
+            : {}
+        const chId = this._lastView?.activeChannelId
+        if (!chId) throw new Error('no active channel for webhook')
+        await this.ipc({
+          type: 'create-channel-webhook',
+          channelId: chId,
+          name: spec.name || 'Agentctl Webhook'
+        })
+        results.push({ createWebhookActiveChannel: true, channelId: chId })
+      }
+      if (step.executeLastChannelWebhook) {
+        const spec =
+          step.executeLastChannelWebhook && typeof step.executeLastChannelWebhook === 'object'
+            ? step.executeLastChannelWebhook
+            : {}
+        const token = this._lastWebhookToken
+        if (!token) throw new Error('no webhook token from prior step')
+        const view = await this.ipc({
+          type: 'execute-channel-webhook',
+          token,
+          content: String(spec.content || 'webhook post from agentctl'),
+          username: spec.username || 'Agentctl Webhook'
+        })
+        results.push({ executeLastChannelWebhook: true, view })
+      }
     }
     return results
   }