diff --git a/common/.claude/CLAUDE.md b/common/.claude/CLAUDE.md
new file mode 120000
index 0000000..be77ac8
--- /dev/null
+++ b/common/.claude/CLAUDE.md
@@ -0,0 +1 @@
+../AGENTS.md
\ No newline at end of file
diff --git a/common/.gemini/config.yaml b/common/.gemini/config.yaml
index 3c7c033..080ba11 100644
--- a/common/.gemini/config.yaml
+++ b/common/.gemini/config.yaml
@@ -1,3 +1,7 @@
+# NOTE: This file is canonically maintained in
+# <https://github.com/bootc-dev/infra/tree/main/common>
+# DO NOT EDIT
+#
 # This config mainly overrides `summary: false` by default
 # as it's really noisy.
 have_fun: true
diff --git a/common/AGENTS.md b/common/AGENTS.md
new file mode 100644
index 0000000..6f7982c
--- /dev/null
+++ b/common/AGENTS.md
@@ -0,0 +1,29 @@
+<!-- This file is canonically maintained in <https://github.com/bootc-dev/infra/tree/main/common> -->
+
+# Instructions for AI agents
+
+## CRITICAL instructions for generating commits
+
+### Signed-off-by
+
+Human review is required for all code that is generated
+or assisted by a large language model. If you
+are a LLM, you MUST NOT include a `Signed-off-by`
+on any automatically generated git commits. Only explicit
+human action or request should include a Signed-off-by.
+If for example you automatically create a pull request
+and the DCO check fails, tell the human to review
+the code and give them instructions on how to add
+a signoff.
+
+### Attribution
+
+When generating substantial amounts of code, you SHOULD
+include an `Assisted-by: TOOLNAME (MODELNAME)`. For example,
+`Assisted-by: Goose (Sonnet 4.5)`.
+
+## Follow other guidelines
+
+Look at the project README.md and look for guidelines
+related to contribution, such as a CONTRIBUTING.md
+and follow those.