From 343e1aa80c7b039d87a4ea9551ca8c3e3420ea99 Mon Sep 17 00:00:00 2001
From: leaysgur <6259812+leaysgur@users.noreply.github.com>
Date: Mon, 24 Aug 2026 06:51:46 +0000
Subject: [PATCH] docs(formatter): add note for idempotency checks (#26040)

---
 AGENTS.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/AGENTS.md b/AGENTS.md
index 45eb4e569b..f8c1dd5d03 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -190,6 +190,7 @@ fn test() {
 - **Command**: `cargo test -p <crate>` (conformance only: `--test conformance`)
 - **Debug**: `PRETTIER_FILTER=<name> cargo test -p <crate> --test conformance -- --nocapture`
 - Conformance compares output with Prettier's snapshots (suite self-provisioned by `oxc_formatter_tests`); reports are pinned with `insta`
+- Both harnesses re-format every output and record idempotency violations in the snapshots/reports (tracked, not asserted); adding a fixture automatically covers idempotency
 
 #### oxc_minifier