[PATCH v2] docs/process: document AI-assisted patch tags

[Cody Zuschlag <cody.zuschlag@xxxxxxxxx>]

Add documentation for the Assisted-by tag to clarify how
AI-assisted tooling may be disclosed in Xen patches.

The guidance is inspired by similar work in the Linux kernel
documentation.

Assisted-by: ChatGPT
Signed-off-by: Cody Zuschlag <cody.zuschlag@xxxxxxxxx>
---
 docs/process/sending-patches.pandoc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/docs/process/sending-patches.pandoc 
b/docs/process/sending-patches.pandoc
index 798ecceb..b61584f9 100644
--- a/docs/process/sending-patches.pandoc
+++ b/docs/process/sending-patches.pandoc
@@ -195,6 +195,25 @@ E.g.:
 
     Requested-by: Jane Doe <jane.doe@xxxxxxxxxxx>
 
+### Assisted-by:
+
+This optional tag can be used when AI-assisted tooling contributed to the
+preparation of a patch. It is in the format:
+
+    Assisted-by: <tool-name>[:<model-version>] [tool...]
+
+E.g.:
+
+    Assisted-by: Claude:claude-3-opus coccinelle sparse
+    Assisted-by: ChatGPT:gpt-5.5
+
+Basic development tools, such as git, compilers, make, and editors, should
+not be listed.
+
+The person submitting the patch remains responsible for reviewing any
+AI-generated content and ensuring the contribution is correct, appropriate,
+and compliant with Xen's contribution and licensing requirements.
+
 ### Signed-off-by:
 
 This mandatory tag specifies the author(s) of a patch (for each author a
@@ -209,6 +228,9 @@ E.g.:
 The author must be a natural person (not a team or just a company) and the
 `Signed-off-by:` tag must include the real name of the author (no pseudonym).
 
+AI tools must not add `Signed-off-by:` tags, as only natural
+persons can certify the `Developer's Certificate of Origin`.
+
 By signing the patch with her/his name the author explicitly confirms to have
 made the contribution conforming to the `Developer's Certificate of Origin`:
 
-- 
2.45.0