docs: document issue closing convention

1 files changed, 1 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
index 2a95c17e..8e09e379 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -49,6 +49,7 @@ Unit tests live next to the code (`#[cfg(test)] mod tests`). If you add behavior
 ## Conventions
 
 - Conventional commits, lowercase, no emojis.
+- When a commit fully fixes a GitHub issue, include `fixes #<issue-number>` in the commit body so GitHub closes it on merge.
 - Rust: no `unwrap()` in production code. `tracing` for logging. `#[allow]` only with a comment explaining why.
 - Don't bypass checks. If tests fail, fix them before committing.
 - Don't add dependencies without a reason. Check if the existing deps cover it first.