diff --git a/.gitignore b/.gitignore
index d93c40d..3997d51 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,7 @@ result-*
 # Cloudflare
 .wrangler/
 .dev.vars
+
+# Claude Code per-user files
+.claude/settings.local.json
+.claude/launch.json
diff --git a/biome.json b/biome.json
index 8902983..59c85bc 100644
--- a/biome.json
+++ b/biome.json
@@ -7,7 +7,7 @@
 	},
 	"files": {
 		"ignoreUnknown": false,
-		"includes": ["**", "!**/*.svg", "!moq"]
+		"includes": ["**", "!**/*.svg", "!**/*.md", "!moq"]
 	},
 	"formatter": {
 		"enabled": true,
diff --git a/quest/m0/README.md b/quest/m0/README.md
index f55a15d..4e8843c 100644
--- a/quest/m0/README.md
+++ b/quest/m0/README.md
@@ -11,6 +11,5 @@ developer's machine.
 ## Required
 
 - [Lean AGENTS.md](/quest/m0/lean-agents-md.md) - agent context keeps only rules and conventions, no repo description
-- [Biome passes locally](/quest/m0/biome-local.md) - `just check` passes with Claude Code's local files present
 - [Type-check .astro files](/quest/m0/astro-typecheck.md) - `just check` covers `.astro` via the TypeScript 7.1 content mapper
 - [Dogfood hosted worklets](/quest/m0/dogfood-assets.md) - the sites serve the @moq worklets and workers themselves
diff --git a/quest/m0/biome-local.md b/quest/m0/biome-local.md
deleted file mode 100644
index 37268eb..0000000
--- a/quest/m0/biome-local.md
+++ /dev/null
@@ -1,14 +0,0 @@
-# [XS] Biome passes with Claude Code's local files
-
-## Goal
-
-`just check` passes on a checkout where Claude Code has written its per-user
-`.claude/settings.local.json`, and Biome stops printing warnings for files it
-cannot handle.
-
-## Plan
-
-- Gitignore `.claude/settings.local.json`. It is untracked today, so Biome
-  formats it and fails.
-- Drop Markdown from Biome's `files.includes`. Biome has no Markdown handler, so
-  every tracked `SKILL.md` prints a `files/missingHandler` warning.