Add release build targets for hf

Makefile

@@ -0,0 +1,35 @@
+VERSION ?= dev
+BINARY := hf
+MAIN_PKG := ./cmd/hf
+LDFLAGS := -X git.hangman-lab.top/zhi/HarborForge.Cli/internal/commands.Version=$(VERSION)
+DIST_DIR := dist
+RELEASE_TARGETS := \
+	linux/amd64 \
+	linux/arm64 \
+	darwin/amd64 \
+	darwin/arm64 \
+	windows/amd64
+
+.PHONY: build clean release release-all
+
+build:
+	mkdir -p bin
+	go build -ldflags "$(LDFLAGS)" -o ./bin/$(BINARY) $(MAIN_PKG)
+
+clean:
+	rm -rf ./bin/$(BINARY) ./$(DIST_DIR)
+
+release: clean
+	mkdir -p $(DIST_DIR)
+	@set -e; \
+	for target in $(RELEASE_TARGETS); do \
+		os=$${target%/*}; \
+		arch=$${target#*/}; \
+		ext=""; \
+		if [ "$$os" = "windows" ]; then ext=".exe"; fi; \
+		out="$(DIST_DIR)/$(BINARY)_$(VERSION)_$${os}_$${arch}$${ext}"; \
+		echo "==> Building $$out"; \
+		GOOS=$$os GOARCH=$$arch go build -ldflags "$(LDFLAGS)" -o "$$out" $(MAIN_PKG); \
+	done
+
+release-all: release

README.md

@@ -8,12 +8,24 @@
 go build -o ./bin/hf ./cmd/hf
 ```
 
+Or use the bundled Makefile:
+
+```bash
+make build
+```
+
 To set the version at build time:
 
 ```bash
 go build -ldflags "-X git.hangman-lab.top/zhi/HarborForge.Cli/internal/commands.Version=1.0.0" -o ./bin/hf ./cmd/hf
 ```
 
+The Makefile versioned equivalent is:
+
+```bash
+make build VERSION=1.0.0
+```
+
 ## Run
 
 ```bash
@@ -53,13 +65,13 @@ Make sure `~/.local/bin` is on `PATH` before invoking `hf` directly.
 
 ### OpenClaw profile install target
 
-The planned OpenClaw plugin installer flow will place the binary at:
+The OpenClaw plugin installer flow places the binary at:
 
 ```text
 ~/.openclaw/bin/hf
 ```
 
-Until that installer support lands, the equivalent manual install is:
+If you want the equivalent manual install:
 
 ```bash
 mkdir -p "$HOME/.openclaw/bin"
@@ -100,6 +112,33 @@ hf task list
 hf task list --token "$HF_TOKEN"
 ```
 
+## Release Packaging
+
+Cross-platform release builds are available through the Makefile:
+
+```bash
+make release VERSION=1.0.0
+```
+
+This produces versioned artifacts in `dist/` using a stable naming pattern:
+
+```text
+hf_<version>_<os>_<arch>
+hf_<version>_<os>_<arch>.exe   # Windows
+```
+
+Current release targets:
+- `linux/amd64`
+- `linux/arm64`
+- `darwin/amd64`
+- `darwin/arm64`
+- `windows/amd64`
+
+Examples:
+- `dist/hf_1.0.0_linux_amd64`
+- `dist/hf_1.0.0_darwin_arm64`
+- `dist/hf_1.0.0_windows_amd64.exe`
+
 ## Package Layout
 
 ```text
@@ -189,5 +228,5 @@ There is not yet a finer-grained exit-code taxonomy; callers should currently tr
 ### Pending
 
 - Backend code-based endpoint support (some commands still use id-based API routes)
-- Cross-platform binary packaging / release pipeline
+- Release automation beyond local `make release` packaging (checksums / archives / CI publishing)
 - Integration tests