diff --git a/dot_config/agents/AGENTS.md b/dot_config/agents/AGENTS.md
new file mode 100644
index 0000000..1e6755a
--- /dev/null
+++ b/dot_config/agents/AGENTS.md
@@ -0,0 +1,6 @@
+# Agent instructions
+
+## Commits
+
+- Do not add a `Co-authored-by` trailer (or any other agent attribution) to commit messages.
+- Before committing, show the proposed commit message and wait for approval. Apply any edits I request, then commit.
diff --git a/dot_config/opencode/symlink_AGENTS.md.tmpl b/dot_config/opencode/symlink_AGENTS.md.tmpl
new file mode 100644
index 0000000..d7c91bf
--- /dev/null
+++ b/dot_config/opencode/symlink_AGENTS.md.tmpl
@@ -0,0 +1 @@
+{{ .chezmoi.homeDir }}/.config/agents/AGENTS.md
diff --git a/dot_copilot/symlink_copilot-instructions.md.tmpl b/dot_copilot/symlink_copilot-instructions.md.tmpl
new file mode 100644
index 0000000..d7c91bf
--- /dev/null
+++ b/dot_copilot/symlink_copilot-instructions.md.tmpl
@@ -0,0 +1 @@
+{{ .chezmoi.homeDir }}/.config/agents/AGENTS.md