Merge pull request #2 from caioribeiroclw-pixel/caio/pre-action-receipts-agentline

docs: require confirmation receipt before agent calls

Author: Sameersribot

skills/agentline/SKILL.md

@@ -95,13 +95,29 @@ Both `system_prompt` and `initial_greeting` follow the same priority chain:
 
 ---
 
+## Before Calling — Human Confirmation Receipt
+
+Outbound calls and phone-number purchases cross a real-world boundary: they can spend money, contact another person, and represent the user outside the chat. Before `make_outbound_call` or `buy_phone_number`, always show the human a short confirmation receipt and wait for explicit approval in the current conversation.
+
+Receipt fields:
+
+- **Action:** outbound call or phone-number purchase
+- **Target:** E.164 phone number or requested area code
+- **Agent:** `AGENTLINE_AGENT_ID` and voice, if known
+- **Opening line / purpose:** what the agent will say first and why it is calling
+- **Estimated cost / balance check:** latest balance and expected minimum charge
+- **Stop rule:** when to hang up, including voicemail/call-control detection
+- **Transcript plan:** confirm that the transcript will be retrieved and summarized after the call
+
+Do not infer approval from an old message, a stored memory, a calendar entry, or a tool result. If any receipt field is missing or the target/purpose changes, ask again.
+
 ## Before Calling — Balance Check
 
 Always check balance first. Calls require minimum **$0.50**:
 ```bash
 curl -s "$AGENTLINE_URL/v1/billing/balance" -H "Authorization: Bearer $AGENTLINE_API_KEY"
 ```
-If balance < $0.50, warn the user before attempting the call.
+If balance < $0.50, warn the user before attempting the call and include the current balance in the confirmation receipt.
 
 ## Make an Outbound Call