feat: add beads@0.55.4 formula

Static build with icu4c linked in. macOS arm64 only.
Upstream beads 0.57+ has breaking changes to bd import and hook formats.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: iostreamer-X

Formula/beads@0.55.4.rb

@@ -0,0 +1,23 @@
+class BeadsAT0554 < Formula
+  desc "Git-backed issue tracker with first-class dependency support (pinned for requestly-api-client)"
+  homepage "https://github.com/steveyegge/beads"
+  version "0.55.4"
+  license "MIT"
+
+  on_macos do
+    if Hardware::CPU.arm?
+      url "https://github.com/requestly/homebrew-tools/releases/download/beads-0.55.4/bd-0.55.4-darwin-arm64.tar.gz"
+      sha256 "812262396e8d18aa662a13c985dd9ce356cb275e7017fbba60fd606073fed77c"
+    end
+  end
+
+  depends_on :macos
+
+  def install
+    bin.install "bd"
+  end
+
+  test do
+    assert_match "0.55.4", shell_output("#{bin}/bd --version")
+  end
+end

README.md

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+# Requestly Homebrew Tap
+
+Custom Homebrew formulae for Requestly development tools.
+
+## Install
+
+```bash
+brew tap requestly/tools
+brew install requestly/tools/beads@0.55.4
+```
+
+## Available Formulae
+
+| Formula | Version | Description |
+|---------|---------|-------------|
+| `beads@0.55.4` | 0.55.4 | Git-backed issue tracker (static build with icu4c linked in) |
+
+## Why pinned versions?
+
+The upstream `beads` Homebrew formula tracks the latest release. When upstream introduces breaking changes that affect our workflow, we pin to a known-good version here until we can upgrade.
+
+## Building from source
+
+The beads binary requires CGO with icu4c for embedded Dolt support. The upstream GitHub releases ship without CGO on macOS, so we build our own:
+
+```bash
+brew install go icu4c@78
+git clone --branch v0.55.4 --depth 1 https://github.com/steveyegge/beads.git
+cd beads
+
+mkdir -p icu-static-lib
+cp /opt/homebrew/opt/icu4c@78/lib/libicuuc.a icu-static-lib/
+cp /opt/homebrew/opt/icu4c@78/lib/libicui18n.a icu-static-lib/
+cp /opt/homebrew/opt/icu4c@78/lib/libicudata.a icu-static-lib/
+
+CGO_ENABLED=1 \
+  CGO_CFLAGS="-I/opt/homebrew/opt/icu4c@78/include" \
+  CGO_CXXFLAGS="-I/opt/homebrew/opt/icu4c@78/include" \
+  CGO_LDFLAGS="-L$(pwd)/icu-static-lib -lstdc++ -lc++" \
+  go build -o bd -ldflags="-s -w -X main.Version=0.55.4 -X main.Build=static" ./cmd/bd
+```