diff --git a/README.md b/README.md
index 35c4dc5..386aef8 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,13 @@
 # bird 🐦 — fast X CLI for tweeting, replying, and reading
 
-`bird` is a fast X CLI for tweeting, replying, and reading via X/Twitter GraphQL through twitter safe relay.
+`bird` is a fast X CLI for tweeting, replying, and reading via X/Twitter GraphQL through
+[twitter safe relay](https://github.com/fa0311/twitter_api_safe_relay).
 
 ## Disclaimer
 
 This project uses X/Twitter’s [**documented**](https://github.com/fa0311/TwitterInternalAPIDocument) internal web
-GraphQL API through twitter safe relay. X can change endpoints, query IDs, and anti-bot behavior at any time —
-**expect this to break without notice**.
+GraphQL API through [twitter safe relay](https://github.com/fa0311/twitter_api_safe_relay). X can change endpoints,
+query IDs, and anti-bot behavior at any time — **expect this to break without notice**.
 
 ## Install
 
@@ -17,7 +18,7 @@ npm config set @yuta:registry=https://git.yutakobayashi.com/api/packages/yuta/np
 npm install -g @yuta/bird
 
 # one-shot (no install)
-npx -y @yuta/bird whoami
+npx -y --@yuta:registry=https://git.yutakobayashi.com/api/packages/yuta/npm/ @yuta/bird whoami
 ```
 
 Nix flakes:
@@ -26,12 +27,6 @@ Nix flakes:
 nix run git+https://git.yutakobayashi.com/yuta/bird -- --help
 ```
 
-Homebrew (macOS, prebuilt Bun binary):
-
-```bash
-brew install steipete/tap/bird
-```
-
 ## Quickstart
 
 ```bash
@@ -200,8 +195,8 @@ Global options:
 
 ## Authentication (GraphQL)
 
-`bird` does not handle Twitter authentication locally. It sends Twitter API-compatible requests to twitter safe relay,
-and the relay handles authentication.
+`bird` does not handle Twitter authentication locally. It sends Twitter API-compatible requests to
+[twitter safe relay](https://github.com/fa0311/twitter_api_safe_relay), and the relay handles authentication.
 
 Write operations:
 - `tweet`/`reply` primarily use GraphQL (`CreateTweet`).