diff --git a/docs/LOCAL_DEVELOPMENT.md b/docs/LOCAL_DEVELOPMENT.md
index dd16b4ad7..21259fb5f 100644
--- a/docs/LOCAL_DEVELOPMENT.md
+++ b/docs/LOCAL_DEVELOPMENT.md
@@ -292,6 +292,16 @@ If you see `./server: No such file or directory`:
 pnpm dev:sync:build
 ```
 
+### Tailing mana-auth logs
+
+When mana-auth runs inside a `dev:*:full` command its output is multiplexed with other services by `concurrently`. To see auth stderr in isolation, open a second terminal and run:
+
+```bash
+pnpm logs:auth
+```
+
+The `dev:auth` script tees stdout+stderr to `services/mana-auth/dev.log` (gitignored), and `logs:auth` tails that file.
+
 ### Port already in use
 
 If auth (port 3001) or sync (port 3050) is already running:
diff --git a/package.json b/package.json
index 422cccc76..fbafc3be8 100644
--- a/package.json
+++ b/package.json
@@ -76,7 +76,8 @@
 		"dev:chat:web": "pnpm --filter @chat/web dev",
 		"dev:chat:landing": "pnpm --filter @chat/landing dev",
 		"dev:chat:app": "concurrently -n api,web -c yellow,cyan \"pnpm dev:api\" \"pnpm dev:chat:web\"",
-		"dev:auth": "cd services/mana-auth && bun run --watch src/index.ts",
+		"dev:auth": "cd services/mana-auth && bun run --watch src/index.ts 2>&1 | tee dev.log",
+		"logs:auth": "tail -f services/mana-auth/dev.log",
 		"dev:events": "cd services/mana-events && bun run --watch src/index.ts",
 		"dev:analytics": "cd services/mana-analytics && bun run --watch src/index.ts",
 		"dev:sync": "cd services/mana-sync && JWKS_URL=http://localhost:3001/api/auth/jwks DATABASE_URL=postgresql://mana:devpassword@localhost:5432/mana_sync ./server",