diff --git a/.github/workflows/go-releaser-checks.yml b/.github/workflows/go-releaser-checks.yml
index 999e178..eb513c6 100644
--- a/.github/workflows/go-releaser-checks.yml
+++ b/.github/workflows/go-releaser-checks.yml
@@ -16,17 +16,36 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Read build metadata
+        id: build_info
+        run: |
+          bash ./scripts/read_build_info.sh >> "$GITHUB_OUTPUT"
+
+      - name: Reject preview-tag in pull requests to main
+        if: ${{ github.event_name == 'pull_request' && github.base_ref == 'main' }}
+        run: |
+          if [[ -n "${{ steps.build_info.outputs.preview_tag }}" ]]; then
+            echo "preview-tag must be empty for pull requests targeting main." >&2
+            exit 1
+          fi
+
       - name: Check GoReleaser
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
         with:
           distribution: goreleaser
           version: '~> v2'
           args: check
+        env:
+          TERRABLE_BUILD_VERSION: ${{ steps.build_info.outputs.version }}
+          TERRABLE_BUILD_PREVIEW_TAG: ${{ steps.build_info.outputs.preview_tag }}
   
       - name: GoReleaser dry-run
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
         with:
           distribution: goreleaser
           version: '~> v2'
           args: build --snapshot
-  
\ No newline at end of file
+        env:
+          TERRABLE_BUILD_VERSION: ${{ steps.build_info.outputs.version }}
+          TERRABLE_BUILD_PREVIEW_TAG: ${{ steps.build_info.outputs.preview_tag }}
+  
diff --git a/.github/workflows/go-releaser-release.yml b/.github/workflows/go-releaser-release.yml
index 298bc25..9e896e8 100644
--- a/.github/workflows/go-releaser-release.yml
+++ b/.github/workflows/go-releaser-release.yml
@@ -12,12 +12,28 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+    env:
+      HOMEBREW_TAP_BRANCH: ${{ github.ref_type == 'tag' && contains(github.ref_name, '-') && 'preview' || 'main' }}
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
+      - name: Read build metadata
+        id: build_info
+        run: |
+          bash ./scripts/read_build_info.sh >> "$GITHUB_OUTPUT"
+
+      - name: Select GoReleaser mode
+        id: goreleaser_mode
+        run: |
+          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
+            echo "args=release --snapshot --clean" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          echo "args=release --clean" >> "$GITHUB_OUTPUT"
+
       - name: Generate GitHub App token
         id: generate_token
         uses: tibdex/github-app-token@v2
@@ -33,11 +49,13 @@ jobs:
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
 
       - name: GoReleaser release
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
         with:
           distribution: goreleaser
           version: '~> v2'
-          args: release --clean
+          args: ${{ steps.goreleaser_mode.outputs.args }}
         env:
           GITHUB_TOKEN: ${{ steps.generate_token.outputs.token }}
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
+          TERRABLE_BUILD_VERSION: ${{ steps.build_info.outputs.version }}
+          TERRABLE_BUILD_PREVIEW_TAG: ${{ steps.build_info.outputs.preview_tag }}
diff --git a/.github/workflows/publish-new-version-tag.yml b/.github/workflows/publish-new-version-tag.yml
index 66eeb95..8189715 100644
--- a/.github/workflows/publish-new-version-tag.yml
+++ b/.github/workflows/publish-new-version-tag.yml
@@ -27,18 +27,39 @@ jobs:
           fetch-depth: 0
           token: ${{ steps.generate_token.outputs.token }}
 
-      - name: Read version from file
-        id: version
+      - name: Read build metadata
+        id: build_info
         run: |
-          VERSION=$(grep -oP 'version\s*=\s*\K[\d.]+' terrable_build)
-          echo "::set-output name=version::$VERSION"
+          bash ./scripts/read_build_info.sh >> "$GITHUB_OUTPUT"
+
+      - name: Reject preview-tag on main
+        run: |
+          if [[ -n "${{ steps.build_info.outputs.preview_tag }}" ]]; then
+            echo "preview-tag must be empty on main releases." >&2
+            exit 1
+          fi
+
+      - name: Check whether stable tag already exists
+        id: tag
+        run: |
+          TAG="v${{ steps.build_info.outputs.version }}"
+          if git rev-parse "$TAG" >/dev/null 2>&1; then
+            EXISTING_COMMIT=$(git rev-list -n1 "$TAG")
+            if [[ "$EXISTING_COMMIT" == "$GITHUB_SHA" ]]; then
+              echo "skip=true" >> "$GITHUB_OUTPUT"
+              exit 0
+            fi
+            echo "Tag $TAG already exists at $EXISTING_COMMIT. Bump terrable_build version before releasing again." >&2
+            exit 1
+          fi
+          echo "skip=false" >> "$GITHUB_OUTPUT"
 
       - name: Create and push tag
+        if: ${{ steps.tag.outputs.skip != 'true' }}
         env:
           GITHUB_TOKEN: ${{ steps.generate_token.outputs.token }}
         run: |
           git config user.name goreleaserbot
           git config user.email bot@goreleaser.com
-          git tag -a v${{ steps.version.outputs.version }} -m "Version ${{ steps.version.outputs.version }}"
-          git push https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git v${{ steps.version.outputs.version }}
-        
\ No newline at end of file
+          git tag -a v${{ steps.build_info.outputs.version }} -m "Version ${{ steps.build_info.outputs.version }}"
+          git push https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git v${{ steps.build_info.outputs.version }}
diff --git a/.github/workflows/publish-preview-version-tag.yml b/.github/workflows/publish-preview-version-tag.yml
new file mode 100644
index 0000000..76e1cdf
--- /dev/null
+++ b/.github/workflows/publish-preview-version-tag.yml
@@ -0,0 +1,76 @@
+name: Publish Preview Version Tag
+
+on:
+  push:
+    branches-ignore:
+      - main
+    paths:
+      - 'terrable_build'
+
+jobs:
+  publish-preview-version-tag:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Read build metadata
+        id: build_info
+        run: |
+          bash ./scripts/read_build_info.sh >> "$GITHUB_OUTPUT"
+
+      - name: Decide whether this branch should publish a preview
+        id: preview
+        run: |
+          if [[ -z "${{ steps.build_info.outputs.preview_tag }}" ]]; then
+            echo "publish=false" >> "$GITHUB_OUTPUT"
+            echo "No preview-tag set in terrable_build, so no preview tag will be published."
+            exit 0
+          fi
+          echo "publish=true" >> "$GITHUB_OUTPUT"
+
+      - name: Generate GitHub App token
+        if: ${{ steps.preview.outputs.publish == 'true' }}
+        id: generate_token
+        uses: tibdex/github-app-token@v2
+        with:
+          app_id: ${{ secrets.ACTIONS_APP_ID }}
+          private_key: ${{ secrets.ACTIONS_APP_PRIVATE_KEY }}
+
+      - name: Check out repository with app token
+        if: ${{ steps.preview.outputs.publish == 'true' }}
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ steps.generate_token.outputs.token }}
+
+      - name: Check whether preview tag already exists
+        if: ${{ steps.preview.outputs.publish == 'true' }}
+        id: tag
+        run: |
+          TAG="v${{ steps.build_info.outputs.version }}-${{ steps.build_info.outputs.preview_tag }}"
+          echo "name=$TAG" >> "$GITHUB_OUTPUT"
+          if git rev-parse "$TAG" >/dev/null 2>&1; then
+            EXISTING_COMMIT=$(git rev-list -n1 "$TAG")
+            if [[ "$EXISTING_COMMIT" == "$GITHUB_SHA" ]]; then
+              echo "skip=true" >> "$GITHUB_OUTPUT"
+              exit 0
+            fi
+            echo "Tag $TAG already exists at $EXISTING_COMMIT. Bump preview-tag in terrable_build before publishing a new preview." >&2
+            exit 1
+          fi
+          echo "skip=false" >> "$GITHUB_OUTPUT"
+
+      - name: Create and push preview tag
+        if: ${{ steps.preview.outputs.publish == 'true' && steps.tag.outputs.skip != 'true' }}
+        env:
+          GITHUB_TOKEN: ${{ steps.generate_token.outputs.token }}
+        run: |
+          git config user.name goreleaserbot
+          git config user.email bot@goreleaser.com
+          git tag -a "${{ steps.tag.outputs.name }}" -m "Preview ${{ steps.tag.outputs.name }}"
+          git push https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git "${{ steps.tag.outputs.name }}"
diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index 1f7550f..48b1c0a 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -19,6 +19,12 @@ signs:
 checksum:
   name_template: "checksums.txt"
 
+snapshot:
+  version_template: "{{ .Env.TERRABLE_BUILD_VERSION }}{{ if .Env.TERRABLE_BUILD_PREVIEW_TAG }}-{{ .Env.TERRABLE_BUILD_PREVIEW_TAG }}{{ end }}-snapshot-{{ .ShortCommit }}"
+
+release:
+  prerelease: auto
+
 archives:
   - formats: [ tar.gz ]
     name_template: >-
@@ -45,6 +51,7 @@ scoops:
   - name: terrable
     url_template: "https://github.com/terrable-dev/terrable/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
     directory: bucket
+    skip_upload: auto
     commit_author:
       name: goreleaserbot
       email: bot@goreleaser.com
@@ -60,7 +67,7 @@ homebrew_casks:
   - name: terrable
     url:
       template: "https://github.com/terrable-dev/terrable/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
-    directory: Formula
+    directory: Casks
     commit_author:
       name: goreleaserbot
       email: bot@goreleaser.com
@@ -70,4 +77,4 @@ homebrew_casks:
     repository:
       owner: terrable-dev
       name: homebrew-tap
-      branch: main
+      branch: "{{ envOrDefault \"HOMEBREW_TAP_BRANCH\" \"main\" }}"
diff --git a/main.go b/main.go
index 1e1f246..7483906 100644
--- a/main.go
+++ b/main.go
@@ -12,7 +12,7 @@ import (
 func main() {
 	app := &cli.App{
 		Name:    "terrable",
-		Version: buildInfo()["version"],
+		Version: buildVersion(),
 
 		Commands: []*cli.Command{
 			{
diff --git a/scripts/read_build_info.sh b/scripts/read_build_info.sh
new file mode 100755
index 0000000..41c359a
--- /dev/null
+++ b/scripts/read_build_info.sh
@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+file="${1:-terrable_build}"
+
+read_key() {
+  local key="$1"
+
+  awk -F= -v key="$key" '
+    $0 ~ /^[[:space:]]*#/ || $0 ~ /^[[:space:]]*$/ { next }
+    {
+      current_key = $1
+      sub(/^[[:space:]]+/, "", current_key)
+      sub(/[[:space:]]+$/, "", current_key)
+
+      if (current_key != key) {
+        next
+      }
+
+      value = substr($0, index($0, "=") + 1)
+      sub(/^[[:space:]]+/, "", value)
+      sub(/[[:space:]]+$/, "", value)
+
+      if ((value ~ /^".*"$/) || (value ~ /^'\''.*'\''$/)) {
+        value = substr(value, 2, length(value) - 2)
+      }
+
+      print value
+      exit
+    }
+  ' "$file"
+}
+
+version="$(read_key version)"
+preview_tag="$(read_key preview-tag)"
+
+if [[ -z "$version" || ! "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  echo "terrable_build must include version = X.Y.Z" >&2
+  exit 1
+fi
+
+if [[ -n "$preview_tag" && ! "$preview_tag" =~ ^[0-9A-Za-z][0-9A-Za-z.-]*$ ]]; then
+  echo "terrable_build preview-tag must match ^[0-9A-Za-z][0-9A-Za-z.-]*$" >&2
+  exit 1
+fi
+
+echo "version=$version"
+echo "preview_tag=$preview_tag"
diff --git a/terrable_build.go b/terrable_build.go
index e4e325d..c3b5b67 100644
--- a/terrable_build.go
+++ b/terrable_build.go
@@ -5,6 +5,9 @@ import (
 	"strings"
 )
 
+// These are set by GoReleaser via ldflags on tagged and snapshot builds.
+var version string
+
 //go:embed terrable_build
 var configFile string
 
@@ -24,10 +27,40 @@ func buildInfo() map[string]string {
 
 		if len(parts) == 2 {
 			key := strings.TrimSpace(parts[0])
-			value := strings.TrimSpace(parts[1])
+			value := normalizeBuildValue(parts[1])
 			config[key] = value
 		}
 	}
 
 	return config
 }
+
+func buildVersion() string {
+	if version != "" {
+		return version
+	}
+
+	info := buildInfo()
+
+	if fileVersion := info["version"]; fileVersion != "" {
+		if previewTag := info["preview-tag"]; previewTag != "" {
+			return fileVersion + "-" + previewTag
+		}
+
+		return fileVersion
+	}
+
+	return "dev"
+}
+
+func normalizeBuildValue(value string) string {
+	value = strings.TrimSpace(value)
+
+	if len(value) >= 2 {
+		if (value[0] == '"' && value[len(value)-1] == '"') || (value[0] == '\'' && value[len(value)-1] == '\'') {
+			return value[1 : len(value)-1]
+		}
+	}
+
+	return value
+}
diff --git a/terrable_build_test.go b/terrable_build_test.go
new file mode 100644
index 0000000..72e6702
--- /dev/null
+++ b/terrable_build_test.go
@@ -0,0 +1,76 @@
+package main
+
+import "testing"
+
+func TestBuildInfoNormalizesQuotedValues(t *testing.T) {
+	originalConfig := configFile
+	originalVersion := version
+	t.Cleanup(func() {
+		configFile = originalConfig
+		version = originalVersion
+	})
+
+	configFile = `
+version = "1.2.3"
+preview-tag = 'rc.1'
+`
+	version = ""
+
+	info := buildInfo()
+
+	if got := info["version"]; got != "1.2.3" {
+		t.Fatalf("expected version 1.2.3, got %q", got)
+	}
+
+	if got := info["preview-tag"]; got != "rc.1" {
+		t.Fatalf("expected preview-tag rc.1, got %q", got)
+	}
+}
+
+func TestBuildVersionPrefersInjectedVersion(t *testing.T) {
+	originalConfig := configFile
+	originalVersion := version
+	t.Cleanup(func() {
+		configFile = originalConfig
+		version = originalVersion
+	})
+
+	configFile = "version = 1.2.3\npreview-tag = rc.1\n"
+	version = "9.9.9"
+
+	if got := buildVersion(); got != "9.9.9" {
+		t.Fatalf("expected injected version, got %q", got)
+	}
+}
+
+func TestBuildVersionUsesPreviewTagFromBuildInfo(t *testing.T) {
+	originalConfig := configFile
+	originalVersion := version
+	t.Cleanup(func() {
+		configFile = originalConfig
+		version = originalVersion
+	})
+
+	configFile = "version = 1.2.3\npreview-tag = preview.4\n"
+	version = ""
+
+	if got := buildVersion(); got != "1.2.3-preview.4" {
+		t.Fatalf("expected preview build version, got %q", got)
+	}
+}
+
+func TestBuildVersionDefaultsToDev(t *testing.T) {
+	originalConfig := configFile
+	originalVersion := version
+	t.Cleanup(func() {
+		configFile = originalConfig
+		version = originalVersion
+	})
+
+	configFile = ""
+	version = ""
+
+	if got := buildVersion(); got != "dev" {
+		t.Fatalf("expected dev fallback, got %q", got)
+	}
+}