Squashed 'claude-templates/' content from commit f116888

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git-subtree-split: f1168885580e9197dcf57b57644eb576fdca2ab1

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diff --git a/.ai/scripts/tests/conftest.py b/.ai/scripts/tests/conftest.py
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+++ b/.ai/scripts/tests/conftest.py
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+"""Shared fixtures for EML extraction tests."""
+
+import os
+from email.message import EmailMessage
+from email.mime.application import MIMEApplication
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+
+import pytest
+
+
+@pytest.fixture
+def fixtures_dir():
+    """Return path to the fixtures/ directory."""
+    return os.path.join(os.path.dirname(__file__), 'fixtures')
+
+
+def make_plain_message(body="Test body", from_="Jonathan Smith <jsmith@example.com>",
+                       to="Craig <craig@example.com>",
+                       subject="Test Subject",
+                       date="Wed, 05 Feb 2026 11:36:00 -0600"):
+    """Create an EmailMessage with text/plain body."""
+    msg = EmailMessage()
+    msg['From'] = from_
+    msg['To'] = to
+    msg['Subject'] = subject
+    msg['Date'] = date
+    msg.set_content(body)
+    return msg
+
+
+def make_html_message(html_body="<p>Test body</p>",
+                      from_="Jonathan Smith <jsmith@example.com>",
+                      to="Craig <craig@example.com>",
+                      subject="Test Subject",
+                      date="Wed, 05 Feb 2026 11:36:00 -0600"):
+    """Create an EmailMessage with text/html body only."""
+    msg = EmailMessage()
+    msg['From'] = from_
+    msg['To'] = to
+    msg['Subject'] = subject
+    msg['Date'] = date
+    msg.set_content(html_body, subtype='html')
+    return msg
+
+
+def make_message_with_attachment(body="Test body",
+                                from_="Jonathan Smith <jsmith@example.com>",
+                                to="Craig <craig@example.com>",
+                                subject="Test Subject",
+                                date="Wed, 05 Feb 2026 11:36:00 -0600",
+                                attachment_filename="document.pdf",
+                                attachment_content=b"fake pdf content"):
+    """Create a multipart message with a text body and one attachment."""
+    msg = MIMEMultipart()
+    msg['From'] = from_
+    msg['To'] = to
+    msg['Subject'] = subject
+    msg['Date'] = date
+
+    msg.attach(MIMEText(body, 'plain'))
+
+    att = MIMEApplication(attachment_content, Name=attachment_filename)
+    att['Content-Disposition'] = f'attachment; filename="{attachment_filename}"'
+    msg.attach(att)
+
+    return msg
+
+
+def add_received_headers(msg, headers):
+    """Add Received headers to an existing message.
+
+    headers: list of header strings, added in order (first = most recent).
+    """
+    for header in headers:
+        msg['Received'] = header
+    return msg