diff --git a/cmd/release_config/Android.bp b/cmd/release_config/Android.bp
new file mode 100644
index 0000000..7f627ff
--- /dev/null
+++ b/cmd/release_config/Android.bp
@@ -0,0 +1,30 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+bootstrap_go_package {
+    name: "release-config",
+    pkgPath: "android/soong/cmd/release_config",
+    deps: [
+        "golang-protobuf-encoding-prototext",
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+        "soong-cmd-release-config-proto",
+    ],
+    srcs: [
+        "main.go",
+    ],
+}
+
+bootstrap_go_package {
+    name: "soong-cmd-release-config-proto",
+    pkgPath: "android/soong/cmd/release_config/release_config_proto",
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
+    srcs: [
+        "release_config_proto/build_flags_out.pb.go",
+        "release_config_proto/build_flags_src.pb.go",
+    ],
+}
diff --git a/cmd/release_config/main.go b/cmd/release_config/main.go
new file mode 100644
index 0000000..3bb6b3d
--- /dev/null
+++ b/cmd/release_config/main.go
@@ -0,0 +1,691 @@
+// Copyright 2024 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"cmp"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+
+	"android/soong/cmd/release_config/release_config_proto"
+
+	"google.golang.org/protobuf/encoding/prototext"
+	"google.golang.org/protobuf/proto"
+)
+
+var verboseFlag bool
+
+type StringList []string
+
+func (l *StringList) Set(v string) error {
+	*l = append(*l, v)
+	return nil
+}
+
+func (l *StringList) String() string {
+	return fmt.Sprintf("%v", *l)
+}
+
+var releaseConfigMapPaths StringList
+
+func DumpProtos(outDir string, message proto.Message) error {
+	basePath := filepath.Join(outDir, "all_release_configs")
+	writer := func(suffix string, marshal func() ([]byte, error)) error {
+		data, err := marshal()
+		if err != nil {
+			return err
+		}
+		return os.WriteFile(fmt.Sprintf("%s.%s", basePath, suffix), data, 0644)
+	}
+	err := writer("textproto", func() ([]byte, error) { return prototext.MarshalOptions{Multiline: true}.Marshal(message) })
+	if err != nil {
+		return err
+	}
+
+	err = writer("pb", func() ([]byte, error) { return proto.Marshal(message) })
+	if err != nil {
+		return err
+	}
+
+	return writer("json", func() ([]byte, error) { return json.MarshalIndent(message, "", "  ") })
+}
+
+func LoadTextproto(path string, message proto.Message) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	ret := prototext.Unmarshal(data, message)
+	if verboseFlag {
+		debug, _ := prototext.Marshal(message)
+		fmt.Printf("%s: %s\n", path, debug)
+	}
+	return ret
+}
+
+func WalkTextprotoFiles(root string, subdir string, Func fs.WalkDirFunc) error {
+	path := filepath.Join(root, subdir)
+	if _, err := os.Stat(path); err != nil {
+		// Missing subdirs are not an error.
+		return nil
+	}
+	return filepath.WalkDir(path, func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if strings.HasSuffix(d.Name(), ".textproto") && d.Type().IsRegular() {
+			return Func(path, d, err)
+		}
+		return nil
+	})
+}
+
+type FlagValue struct {
+	// The path providing this value.
+	path string
+
+	// Protobuf
+	proto release_config_proto.FlagValue
+}
+
+func FlagValueFactory(protoPath string) (fv *FlagValue) {
+	fv = &FlagValue{path: protoPath}
+	if protoPath != "" {
+		LoadTextproto(protoPath, &fv.proto)
+	}
+	return fv
+}
+
+// One directory's contribution to the a release config.
+type ReleaseConfigContribution struct {
+	// Paths to files providing this config.
+	path string
+
+	// The index of the config directory where this release config
+	// contribution was declared.
+	// Flag values cannot be set in a location with a lower index.
+	DeclarationIndex int
+
+	// Protobufs relevant to the config.
+	proto release_config_proto.ReleaseConfig
+
+	FlagValues []*FlagValue
+}
+
+// A single release_config_map.textproto and its associated data.
+// Used primarily for debugging.
+type ReleaseConfigMap struct {
+	// The path to this release_config_map file.
+	path string
+
+	// Data received
+	proto release_config_proto.ReleaseConfigMap
+
+	ReleaseConfigContributions map[string]*ReleaseConfigContribution
+	FlagDeclarations           []release_config_proto.FlagDeclaration
+}
+
+// A generated release config.
+type ReleaseConfig struct {
+	// the Name of the release config
+	Name string
+
+	// The index of the config directory where this release config was
+	// first declared.
+	// Flag values cannot be set in a location with a lower index.
+	DeclarationIndex int
+
+	// What contributes to this config.
+	Contributions []*ReleaseConfigContribution
+
+	// Aliases for this release
+	OtherNames []string
+
+	// The names of release configs that we inherit
+	InheritNames []string
+
+	// Unmarshalled flag artifacts
+	FlagArtifacts FlagArtifacts
+
+	// Generated release config
+	ReleaseConfigArtifact *release_config_proto.ReleaseConfigArtifact
+
+	// We have begun compiling this release config.
+	compileInProgress bool
+}
+
+type FlagArtifact struct {
+	FlagDeclaration *release_config_proto.FlagDeclaration
+
+	// The index of the config directory where this flag was declared.
+	// Flag values cannot be set in a location with a lower index.
+	DeclarationIndex int
+
+	Traces []*release_config_proto.Tracepoint
+
+	// Assigned value
+	Value *release_config_proto.Value
+}
+
+// Key is flag name.
+type FlagArtifacts map[string]*FlagArtifact
+
+type ReleaseConfigDirMap map[string]int
+
+// The generated release configs.
+type ReleaseConfigs struct {
+	// Ordered list of release config maps processed.
+	ReleaseConfigMaps []*ReleaseConfigMap
+
+	// Aliases
+	Aliases map[string]*string
+
+	// Dictionary of flag_name:FlagDeclaration, with no overrides applied.
+	FlagArtifacts FlagArtifacts
+
+	// Dictionary of name:ReleaseConfig
+	ReleaseConfigs map[string]*ReleaseConfig
+
+	// Generated release configs
+	Artifact release_config_proto.ReleaseConfigsArtifact
+
+	// The list of config directories used.
+	ConfigDirs []string
+
+	// A map from the config directory to its order in the list of config
+	// directories.
+	ConfigDirIndexes ReleaseConfigDirMap
+}
+
+func (src *FlagArtifact) Clone() *FlagArtifact {
+	value := &release_config_proto.Value{}
+	proto.Merge(value, src.Value)
+	return &FlagArtifact{
+		FlagDeclaration: src.FlagDeclaration,
+		Traces:          src.Traces,
+		Value:           value,
+	}
+}
+
+func (src FlagArtifacts) Clone() (dst FlagArtifacts) {
+	if dst == nil {
+		dst = make(FlagArtifacts)
+	}
+	for k, v := range src {
+		dst[k] = v.Clone()
+	}
+	return
+}
+
+func ReleaseConfigFactory(name string, index int) (c *ReleaseConfig) {
+	return &ReleaseConfig{Name: name, DeclarationIndex: index}
+}
+
+func ReleaseConfigsFactory() (c *ReleaseConfigs) {
+	return &ReleaseConfigs{
+		Aliases:          make(map[string]*string),
+		FlagArtifacts:    make(map[string]*FlagArtifact),
+		ReleaseConfigs:   make(map[string]*ReleaseConfig),
+		ConfigDirs:       []string{},
+		ConfigDirIndexes: make(ReleaseConfigDirMap),
+	}
+}
+
+func ReleaseConfigMapFactory(protoPath string) (m *ReleaseConfigMap) {
+	m = &ReleaseConfigMap{
+		path:                       protoPath,
+		ReleaseConfigContributions: make(map[string]*ReleaseConfigContribution),
+	}
+	if protoPath != "" {
+		LoadTextproto(protoPath, &m.proto)
+	}
+	return m
+}
+
+func FlagDeclarationFactory(protoPath string) (fd *release_config_proto.FlagDeclaration) {
+	fd = &release_config_proto.FlagDeclaration{}
+	if protoPath != "" {
+		LoadTextproto(protoPath, fd)
+	}
+	return fd
+}
+
+func (configs *ReleaseConfigs) LoadReleaseConfigMap(path string, ConfigDirIndex int) error {
+	m := ReleaseConfigMapFactory(path)
+	if m.proto.Origin == nil || *m.proto.Origin == "" {
+		return fmt.Errorf("Release config map %s lacks origin", path)
+	}
+	if m.proto.DefaultContainer == nil {
+		return fmt.Errorf("Release config map %s lacks default_container", path)
+	}
+	dir := filepath.Dir(path)
+	// Record any aliases, checking for duplicates.
+	for _, alias := range m.proto.Aliases {
+		name := *alias.Name
+		oldTarget, ok := configs.Aliases[name]
+		if ok {
+			if *oldTarget != *alias.Target {
+				return fmt.Errorf("Conflicting alias declarations: %s vs %s",
+					*oldTarget, *alias.Target)
+			}
+		}
+		configs.Aliases[name] = alias.Target
+	}
+	var err error
+	err = WalkTextprotoFiles(dir, "flag_declarations", func(path string, d fs.DirEntry, err error) error {
+		flagDeclaration := FlagDeclarationFactory(path)
+		// Container must be specified.
+		if flagDeclaration.Container == nil {
+			flagDeclaration.Container = m.proto.DefaultContainer
+		}
+		// TODO: drop flag_declaration.origin from the proto.
+		if flagDeclaration.Origin == nil {
+			flagDeclaration.Origin = m.proto.Origin
+		}
+		// There is always a default value.
+		if flagDeclaration.Value == nil {
+			flagDeclaration.Value = &release_config_proto.Value{Val: &release_config_proto.Value_UnspecifiedValue{true}}
+		}
+		m.FlagDeclarations = append(m.FlagDeclarations, *flagDeclaration)
+		name := *flagDeclaration.Name
+		if def, ok := configs.FlagArtifacts[name]; !ok {
+			configs.FlagArtifacts[name] = &FlagArtifact{FlagDeclaration: flagDeclaration, DeclarationIndex: ConfigDirIndex}
+		} else if !proto.Equal(def.FlagDeclaration, flagDeclaration) {
+			return fmt.Errorf("Duplicate definition of %s", *flagDeclaration.Name)
+		}
+		// Set the initial value in the flag artifact.
+		configs.FlagArtifacts[name].UpdateValue(
+			FlagValue{path: path, proto: release_config_proto.FlagValue{
+				Name: proto.String(name), Value: flagDeclaration.Value}})
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	err = WalkTextprotoFiles(dir, "release_configs", func(path string, d fs.DirEntry, err error) error {
+		releaseConfigContribution := &ReleaseConfigContribution{path: path, DeclarationIndex: ConfigDirIndex}
+		LoadTextproto(path, &releaseConfigContribution.proto)
+		name := *releaseConfigContribution.proto.Name
+		if fmt.Sprintf("%s.textproto", name) != filepath.Base(path) {
+			return fmt.Errorf("%s incorrectly declares release config %s", path, name)
+		}
+		if _, ok := configs.ReleaseConfigs[name]; !ok {
+			configs.ReleaseConfigs[name] = ReleaseConfigFactory(name, ConfigDirIndex)
+		}
+		config := configs.ReleaseConfigs[name]
+		config.InheritNames = append(config.InheritNames, releaseConfigContribution.proto.Inherits...)
+
+		// Only walk flag_values/{RELEASE} for defined releases.
+		err2 := WalkTextprotoFiles(dir, filepath.Join("flag_values", name), func(path string, d fs.DirEntry, err error) error {
+			flagValue := FlagValueFactory(path)
+			if fmt.Sprintf("%s.textproto", *flagValue.proto.Name) != filepath.Base(path) {
+				return fmt.Errorf("%s incorrectly sets value for flag %s", path, *flagValue.proto.Name)
+			}
+			releaseConfigContribution.FlagValues = append(releaseConfigContribution.FlagValues, flagValue)
+			return nil
+		})
+		if err2 != nil {
+			return err2
+		}
+		m.ReleaseConfigContributions[name] = releaseConfigContribution
+		config.Contributions = append(config.Contributions, releaseConfigContribution)
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+	configs.ReleaseConfigMaps = append(configs.ReleaseConfigMaps, m)
+	return nil
+}
+
+func (configs *ReleaseConfigs) GetReleaseConfig(name string) (*ReleaseConfig, error) {
+	trace := []string{name}
+	for target, ok := configs.Aliases[name]; ok; target, ok = configs.Aliases[name] {
+		name = *target
+		trace = append(trace, name)
+	}
+	if config, ok := configs.ReleaseConfigs[name]; ok {
+		return config, nil
+	}
+	return nil, fmt.Errorf("Missing config %s.  Trace=%v", name, trace)
+}
+
+func (configs *ReleaseConfigs) DumpMakefile(outDir, targetRelease string) error {
+	outFile := filepath.Join(outDir, "release_config.mk")
+	makeVars := make(map[string]string)
+	config, err := configs.GetReleaseConfig(targetRelease)
+	if err != nil {
+		return err
+	}
+	// Sort the flags by name first.
+	names := []string{}
+	for k, _ := range config.FlagArtifacts {
+		names = append(names, k)
+	}
+	slices.SortFunc(names, func(a, b string) int {
+		return cmp.Compare(a, b)
+	})
+	partitions := make(map[string][]string)
+
+	vNames := []string{}
+	addVar := func(name, suffix, value string) {
+		fullName := fmt.Sprintf("_ALL_RELEASE_FLAGS.%s.%s", name, suffix)
+		vNames = append(vNames, fullName)
+		makeVars[fullName] = value
+	}
+
+	for _, name := range names {
+		flag := config.FlagArtifacts[name]
+		decl := flag.FlagDeclaration
+
+		// cName := strings.ToLower(release_config_proto.Container_name[decl.GetContainer()])
+		cName := strings.ToLower(decl.Container.String())
+		if cName == strings.ToLower(release_config_proto.Container_ALL.String()) {
+			partitions["product"] = append(partitions["product"], name)
+			partitions["system"] = append(partitions["system"], name)
+			partitions["system_ext"] = append(partitions["system_ext"], name)
+			partitions["vendor"] = append(partitions["vendor"], name)
+		} else {
+			partitions[cName] = append(partitions[cName], name)
+		}
+		value := MarshalValue(flag.Value)
+		makeVars[name] = value
+		addVar(name, "PARTITIONS", cName)
+		addVar(name, "DEFAULT", MarshalValue(decl.Value))
+		addVar(name, "VALUE", value)
+		addVar(name, "DECLARED_IN", *flag.Traces[0].Source)
+		addVar(name, "SET_IN", *flag.Traces[len(flag.Traces)-1].Source)
+		addVar(name, "ORIGIN", *decl.Origin)
+	}
+	pNames := []string{}
+	for k, _ := range partitions {
+		pNames = append(pNames, k)
+	}
+	slices.SortFunc(pNames, func(a, b string) int {
+		return cmp.Compare(a, b)
+	})
+
+	// Now sort the make variables, and output them.
+	slices.SortFunc(vNames, func(a, b string) int {
+		return cmp.Compare(a, b)
+	})
+
+	// Write the flags as:
+	//   _ALL_RELELASE_FLAGS
+	//   _ALL_RELEASE_FLAGS.PARTITIONS.*
+	//   all _ALL_RELEASE_FLAGS.*, sorted by name
+	//   Final flag values, sorted by name.
+	data := fmt.Sprintf("_ALL_RELEASE_FLAGS :=$= %s\n", strings.Join(names, " "))
+	for _, pName := range pNames {
+		data += fmt.Sprintf("_ALL_RELEASE_FLAGS.PARTITIONS.%s :=$= %s\n", pName, strings.Join(partitions[pName], " "))
+	}
+	for _, vName := range vNames {
+		data += fmt.Sprintf("%s :=$= %s\n", vName, makeVars[vName])
+	}
+	data += "\n\n# Values for all build flags\n"
+	data += fmt.Sprintf("RELEASE_ACONFIG_VALUE_SETS :=$= %s\n",
+		strings.Join(config.ReleaseConfigArtifact.AconfigValueSets, " "))
+	for _, name := range names {
+		data += fmt.Sprintf("%s :=$= %s\n", name, makeVars[name])
+	}
+	return os.WriteFile(outFile, []byte(data), 0644)
+}
+
+func (configs *ReleaseConfigs) GenerateReleaseConfigs(targetRelease string) error {
+	otherNames := make(map[string][]string)
+	for aliasName, aliasTarget := range configs.Aliases {
+		if _, ok := configs.ReleaseConfigs[aliasName]; ok {
+			return fmt.Errorf("Alias %s is a declared release config", aliasName)
+		}
+		if _, ok := configs.ReleaseConfigs[*aliasTarget]; !ok {
+			if _, ok2 := configs.Aliases[*aliasTarget]; !ok2 {
+				return fmt.Errorf("Alias %s points to non-existing config %s", aliasName, *aliasTarget)
+			}
+		}
+		otherNames[*aliasTarget] = append(otherNames[*aliasTarget], aliasName)
+	}
+	for name, aliases := range otherNames {
+		configs.ReleaseConfigs[name].OtherNames = aliases
+	}
+
+	for _, config := range configs.ReleaseConfigs {
+		err := config.GenerateReleaseConfig(configs)
+		if err != nil {
+			return err
+		}
+	}
+
+	releaseConfig, err := configs.GetReleaseConfig(targetRelease)
+	if err != nil {
+		return err
+	}
+	configs.Artifact = release_config_proto.ReleaseConfigsArtifact{
+		ReleaseConfig: releaseConfig.ReleaseConfigArtifact,
+		OtherReleaseConfigs: func() []*release_config_proto.ReleaseConfigArtifact {
+			orc := []*release_config_proto.ReleaseConfigArtifact{}
+			for name, config := range configs.ReleaseConfigs {
+				if name != releaseConfig.Name {
+					orc = append(orc, config.ReleaseConfigArtifact)
+				}
+			}
+			return orc
+		}(),
+	}
+	return nil
+}
+
+func MarshalValue(value *release_config_proto.Value) string {
+	switch val := value.Val.(type) {
+	case *release_config_proto.Value_UnspecifiedValue:
+		// Value was never set.
+		return ""
+	case *release_config_proto.Value_StringValue:
+		return val.StringValue
+	case *release_config_proto.Value_BoolValue:
+		if val.BoolValue {
+			return "true"
+		}
+		// False ==> empty string
+		return ""
+	case *release_config_proto.Value_Obsolete:
+		return " #OBSOLETE"
+	default:
+		// Flagged as error elsewhere, so return empty string here.
+		return ""
+	}
+}
+
+func (fa *FlagArtifact) UpdateValue(flagValue FlagValue) error {
+	name := *flagValue.proto.Name
+	fa.Traces = append(fa.Traces, &release_config_proto.Tracepoint{Source: proto.String(flagValue.path), Value: flagValue.proto.Value})
+	if fa.Value.GetObsolete() {
+		return fmt.Errorf("Attempting to set obsolete flag %s. Trace=%v", name, fa.Traces)
+	}
+	switch val := flagValue.proto.Value.Val.(type) {
+	case *release_config_proto.Value_StringValue:
+		fa.Value = &release_config_proto.Value{Val: &release_config_proto.Value_StringValue{val.StringValue}}
+	case *release_config_proto.Value_BoolValue:
+		fa.Value = &release_config_proto.Value{Val: &release_config_proto.Value_BoolValue{val.BoolValue}}
+	case *release_config_proto.Value_Obsolete:
+		if !val.Obsolete {
+			return fmt.Errorf("%s: Cannot set obsolete=false.  Trace=%v", name, fa.Traces)
+		}
+		fa.Value = &release_config_proto.Value{Val: &release_config_proto.Value_Obsolete{true}}
+	default:
+		return fmt.Errorf("Invalid type for flag_value: %T.  Trace=%v", val, fa.Traces)
+	}
+	return nil
+}
+
+func (fa *FlagArtifact) Marshal() (*release_config_proto.FlagArtifact, error) {
+	return &release_config_proto.FlagArtifact{
+		FlagDeclaration: fa.FlagDeclaration,
+		Value:           fa.Value,
+		Traces:          fa.Traces,
+	}, nil
+}
+
+func (config *ReleaseConfig) GenerateReleaseConfig(configs *ReleaseConfigs) error {
+	if config.ReleaseConfigArtifact != nil {
+		return nil
+	}
+	if config.compileInProgress {
+		return fmt.Errorf("Loop detected for release config %s", config.Name)
+	}
+	config.compileInProgress = true
+
+	// Generate any configs we need to inherit.  This will detect loops in
+	// the config.
+	contributionsToApply := []*ReleaseConfigContribution{}
+	myInherits := []string{}
+	myInheritsSet := make(map[string]bool)
+	for _, inherit := range config.InheritNames {
+		if _, ok := myInheritsSet[inherit]; ok {
+			continue
+		}
+		myInherits = append(myInherits, inherit)
+		myInheritsSet[inherit] = true
+		iConfig, err := configs.GetReleaseConfig(inherit)
+		if err != nil {
+			return err
+		}
+		iConfig.GenerateReleaseConfig(configs)
+		contributionsToApply = append(contributionsToApply, iConfig.Contributions...)
+	}
+	contributionsToApply = append(contributionsToApply, config.Contributions...)
+
+	myAconfigValueSets := []string{}
+	myFlags := configs.FlagArtifacts.Clone()
+	myDirsMap := make(map[int]bool)
+	for _, contrib := range contributionsToApply {
+		myAconfigValueSets = append(myAconfigValueSets, contrib.proto.AconfigValueSets...)
+		myDirsMap[contrib.DeclarationIndex] = true
+		for _, value := range contrib.FlagValues {
+			fa, ok := myFlags[*value.proto.Name]
+			if !ok {
+				return fmt.Errorf("Setting value for undefined flag %s in %s\n", *value.proto.Name, value.path)
+			}
+			myDirsMap[fa.DeclarationIndex] = true
+			if fa.DeclarationIndex > contrib.DeclarationIndex {
+				// Setting location is to the left of declaration.
+				return fmt.Errorf("Setting value for flag %s not allowed in %s\n", *value.proto.Name, value.path)
+			}
+			if err := fa.UpdateValue(*value); err != nil {
+				return err
+			}
+		}
+	}
+
+	directories := []string{}
+	for idx, confDir := range configs.ConfigDirs {
+		if _, ok := myDirsMap[idx]; ok {
+			directories = append(directories, confDir)
+		}
+	}
+
+	config.FlagArtifacts = myFlags
+	config.ReleaseConfigArtifact = &release_config_proto.ReleaseConfigArtifact{
+		Name:       proto.String(config.Name),
+		OtherNames: config.OtherNames,
+		FlagArtifacts: func() []*release_config_proto.FlagArtifact {
+			ret := []*release_config_proto.FlagArtifact{}
+			for _, flag := range myFlags {
+				ret = append(ret, &release_config_proto.FlagArtifact{
+					FlagDeclaration: flag.FlagDeclaration,
+					Traces:          flag.Traces,
+					Value:           flag.Value,
+				})
+			}
+			return ret
+		}(),
+		AconfigValueSets: myAconfigValueSets,
+		Inherits:         myInherits,
+		Directories:      directories,
+	}
+
+	config.compileInProgress = false
+	return nil
+}
+
+func main() {
+	var targetRelease string
+	var outputDir string
+
+	outEnv := os.Getenv("OUT_DIR")
+	if outEnv == "" {
+		outEnv = "out"
+	}
+	defaultOutputDir := filepath.Join(outEnv, "soong", "release-config")
+	var defaultMapPaths StringList
+	defaultLocations := StringList{
+		"build/release/release_config_map.textproto",
+		"vendor/google_shared/build/release/release_config_map.textproto",
+		"vendor/google/release/release_config_map.textproto",
+	}
+	for _, path := range defaultLocations {
+		if _, err := os.Stat(path); err == nil {
+			defaultMapPaths = append(defaultMapPaths, path)
+		}
+	}
+	prodMaps := os.Getenv("PRODUCT_RELEASE_CONFIG_MAPS")
+	if prodMaps != "" {
+		defaultMapPaths = append(defaultMapPaths, strings.Split(prodMaps, " ")...)
+	}
+
+	flag.BoolVar(&verboseFlag, "debug", false, "print debugging information")
+	flag.Var(&releaseConfigMapPaths, "map", "path to a release_config_map.textproto. may be repeated")
+	flag.StringVar(&targetRelease, "release", "trunk_staging", "TARGET_RELEASE for this build")
+	flag.StringVar(&outputDir, "out_dir", defaultOutputDir, "basepath for the output. Multiple formats are created")
+	flag.Parse()
+
+	if len(releaseConfigMapPaths) == 0 {
+		releaseConfigMapPaths = defaultMapPaths
+		fmt.Printf("No --map argument provided.  Using: --map %s\n", strings.Join(releaseConfigMapPaths, " --map "))
+	}
+
+	configs := ReleaseConfigsFactory()
+	for idx, releaseConfigMapPath := range releaseConfigMapPaths {
+		// Maintain an ordered list of release config directories.
+		configDir := filepath.Dir(releaseConfigMapPath)
+		configs.ConfigDirIndexes[configDir] = idx
+		configs.ConfigDirs = append(configs.ConfigDirs, configDir)
+		err := configs.LoadReleaseConfigMap(releaseConfigMapPath, idx)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	// Now that we have all of the release config maps, can meld them and generate the artifacts.
+	err := configs.GenerateReleaseConfigs(targetRelease)
+	if err != nil {
+		panic(err)
+	}
+	err = os.MkdirAll(outputDir, 0775)
+	if err != nil {
+		panic(err)
+	}
+	err = configs.DumpMakefile(outputDir, targetRelease)
+	if err != nil {
+		panic(err)
+	}
+	DumpProtos(outputDir, &configs.Artifact)
+}
diff --git a/cmd/release_config/release_config_proto/Android.bp b/cmd/release_config/release_config_proto/Android.bp
new file mode 100644
index 0000000..a8660c7
--- /dev/null
+++ b/cmd/release_config/release_config_proto/Android.bp
@@ -0,0 +1,30 @@
+// Copyright 2024 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+bootstrap_go_package {
+    name: "soong-release_config_proto",
+    pkgPath: "android/soong/release_config/release_config_proto",
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
+    srcs: [
+        "build_flags_src.pb.go",
+        "build_flags_out.pb.go",
+    ],
+}
diff --git a/cmd/release_config/release_config_proto/build_flags_out.pb.go b/cmd/release_config/release_config_proto/build_flags_out.pb.go
new file mode 100644
index 0000000..adc1ea4
--- /dev/null
+++ b/cmd/release_config/release_config_proto/build_flags_out.pb.go
@@ -0,0 +1,486 @@
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.33.0
+// 	protoc        v3.21.12
+// source: build_flags_out.proto
+
+package release_config_proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Tracepoint struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Path to declaration or value file relative to $TOP
+	Source *string `protobuf:"bytes,1,opt,name=source" json:"source,omitempty"`
+	Value  *Value  `protobuf:"bytes,201,opt,name=value" json:"value,omitempty"`
+}
+
+func (x *Tracepoint) Reset() {
+	*x = Tracepoint{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_out_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Tracepoint) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Tracepoint) ProtoMessage() {}
+
+func (x *Tracepoint) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_out_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Tracepoint.ProtoReflect.Descriptor instead.
+func (*Tracepoint) Descriptor() ([]byte, []int) {
+	return file_build_flags_out_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Tracepoint) GetSource() string {
+	if x != nil && x.Source != nil {
+		return *x.Source
+	}
+	return ""
+}
+
+func (x *Tracepoint) GetValue() *Value {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+type FlagArtifact struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The original declaration
+	FlagDeclaration *FlagDeclaration `protobuf:"bytes,1,opt,name=flag_declaration,json=flagDeclaration" json:"flag_declaration,omitempty"`
+	// Value for the flag
+	Value *Value `protobuf:"bytes,201,opt,name=value" json:"value,omitempty"`
+	// Trace of where the flag value was assigned.
+	Traces []*Tracepoint `protobuf:"bytes,8,rep,name=traces" json:"traces,omitempty"`
+}
+
+func (x *FlagArtifact) Reset() {
+	*x = FlagArtifact{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_out_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FlagArtifact) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FlagArtifact) ProtoMessage() {}
+
+func (x *FlagArtifact) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_out_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FlagArtifact.ProtoReflect.Descriptor instead.
+func (*FlagArtifact) Descriptor() ([]byte, []int) {
+	return file_build_flags_out_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *FlagArtifact) GetFlagDeclaration() *FlagDeclaration {
+	if x != nil {
+		return x.FlagDeclaration
+	}
+	return nil
+}
+
+func (x *FlagArtifact) GetValue() *Value {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *FlagArtifact) GetTraces() []*Tracepoint {
+	if x != nil {
+		return x.Traces
+	}
+	return nil
+}
+
+type ReleaseConfigArtifact struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The name of the release config.
+	// See # name for format detail
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Other names by which this release is known (for example, `next`)
+	OtherNames []string `protobuf:"bytes,2,rep,name=other_names,json=otherNames" json:"other_names,omitempty"`
+	// The complete set of build flags in this release config, after all
+	// inheritance and other processing is complete.
+	FlagArtifacts []*FlagArtifact `protobuf:"bytes,3,rep,name=flag_artifacts,json=flagArtifacts" json:"flag_artifacts,omitempty"`
+	// The (complete) list of aconfig_value_sets Soong modules to use.
+	AconfigValueSets []string `protobuf:"bytes,4,rep,name=aconfig_value_sets,json=aconfigValueSets" json:"aconfig_value_sets,omitempty"`
+	// The names of the release_config_artifacts from which we inherited.
+	// Included for reference only.
+	Inherits []string `protobuf:"bytes,5,rep,name=inherits" json:"inherits,omitempty"`
+	// The release config directories used for this config.
+	// For example, "build/release".
+	Directories []string `protobuf:"bytes,6,rep,name=directories" json:"directories,omitempty"`
+}
+
+func (x *ReleaseConfigArtifact) Reset() {
+	*x = ReleaseConfigArtifact{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_out_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReleaseConfigArtifact) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReleaseConfigArtifact) ProtoMessage() {}
+
+func (x *ReleaseConfigArtifact) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_out_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReleaseConfigArtifact.ProtoReflect.Descriptor instead.
+func (*ReleaseConfigArtifact) Descriptor() ([]byte, []int) {
+	return file_build_flags_out_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ReleaseConfigArtifact) GetName() string {
+	if x != nil && x.Name != nil {
+		return *x.Name
+	}
+	return ""
+}
+
+func (x *ReleaseConfigArtifact) GetOtherNames() []string {
+	if x != nil {
+		return x.OtherNames
+	}
+	return nil
+}
+
+func (x *ReleaseConfigArtifact) GetFlagArtifacts() []*FlagArtifact {
+	if x != nil {
+		return x.FlagArtifacts
+	}
+	return nil
+}
+
+func (x *ReleaseConfigArtifact) GetAconfigValueSets() []string {
+	if x != nil {
+		return x.AconfigValueSets
+	}
+	return nil
+}
+
+func (x *ReleaseConfigArtifact) GetInherits() []string {
+	if x != nil {
+		return x.Inherits
+	}
+	return nil
+}
+
+func (x *ReleaseConfigArtifact) GetDirectories() []string {
+	if x != nil {
+		return x.Directories
+	}
+	return nil
+}
+
+type ReleaseConfigsArtifact struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The active release config for this build.
+	ReleaseConfig *ReleaseConfigArtifact `protobuf:"bytes,1,opt,name=release_config,json=releaseConfig" json:"release_config,omitempty"`
+	// All other release configs defined for this TARGET_PRODUCT.
+	OtherReleaseConfigs []*ReleaseConfigArtifact `protobuf:"bytes,2,rep,name=other_release_configs,json=otherReleaseConfigs" json:"other_release_configs,omitempty"`
+}
+
+func (x *ReleaseConfigsArtifact) Reset() {
+	*x = ReleaseConfigsArtifact{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_out_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReleaseConfigsArtifact) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReleaseConfigsArtifact) ProtoMessage() {}
+
+func (x *ReleaseConfigsArtifact) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_out_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReleaseConfigsArtifact.ProtoReflect.Descriptor instead.
+func (*ReleaseConfigsArtifact) Descriptor() ([]byte, []int) {
+	return file_build_flags_out_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *ReleaseConfigsArtifact) GetReleaseConfig() *ReleaseConfigArtifact {
+	if x != nil {
+		return x.ReleaseConfig
+	}
+	return nil
+}
+
+func (x *ReleaseConfigsArtifact) GetOtherReleaseConfigs() []*ReleaseConfigArtifact {
+	if x != nil {
+		return x.OtherReleaseConfigs
+	}
+	return nil
+}
+
+var File_build_flags_out_proto protoreflect.FileDescriptor
+
+var file_build_flags_out_proto_rawDesc = []byte{
+	0x0a, 0x15, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x66, 0x6c, 0x61, 0x67, 0x73, 0x5f, 0x6f, 0x75,
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+	0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x73, 0x5f, 0x61,
+	0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x12, 0x5c, 0x0a, 0x0e, 0x72, 0x65, 0x6c, 0x65, 0x61,
+	0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32,
+	0x35, 0x2e, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2e, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73,
+	0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x72,
+	0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x61, 0x72,
+	0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x52, 0x0d, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x43,
+	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x69, 0x0a, 0x15, 0x6f, 0x74, 0x68, 0x65, 0x72, 0x5f, 0x72,
+	0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x73, 0x18, 0x02,
+	0x20, 0x03, 0x28, 0x0b, 0x32, 0x35, 0x2e, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2e, 0x72,
+	0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x2e, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66,
+	0x69, 0x67, 0x5f, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x52, 0x13, 0x6f, 0x74, 0x68,
+	0x65, 0x72, 0x52, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x73,
+	0x42, 0x33, 0x5a, 0x31, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f, 0x73, 0x6f, 0x6f, 0x6e,
+	0x67, 0x2f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
+	0x2f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f,
+	0x70, 0x72, 0x6f, 0x74, 0x6f,
+}
+
+var (
+	file_build_flags_out_proto_rawDescOnce sync.Once
+	file_build_flags_out_proto_rawDescData = file_build_flags_out_proto_rawDesc
+)
+
+func file_build_flags_out_proto_rawDescGZIP() []byte {
+	file_build_flags_out_proto_rawDescOnce.Do(func() {
+		file_build_flags_out_proto_rawDescData = protoimpl.X.CompressGZIP(file_build_flags_out_proto_rawDescData)
+	})
+	return file_build_flags_out_proto_rawDescData
+}
+
+var file_build_flags_out_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_build_flags_out_proto_goTypes = []interface{}{
+	(*Tracepoint)(nil),             // 0: android.release_config_proto.tracepoint
+	(*FlagArtifact)(nil),           // 1: android.release_config_proto.flag_artifact
+	(*ReleaseConfigArtifact)(nil),  // 2: android.release_config_proto.release_config_artifact
+	(*ReleaseConfigsArtifact)(nil), // 3: android.release_config_proto.release_configs_artifact
+	(*Value)(nil),                  // 4: android.release_config_proto.value
+	(*FlagDeclaration)(nil),        // 5: android.release_config_proto.flag_declaration
+}
+var file_build_flags_out_proto_depIdxs = []int32{
+	4, // 0: android.release_config_proto.tracepoint.value:type_name -> android.release_config_proto.value
+	5, // 1: android.release_config_proto.flag_artifact.flag_declaration:type_name -> android.release_config_proto.flag_declaration
+	4, // 2: android.release_config_proto.flag_artifact.value:type_name -> android.release_config_proto.value
+	0, // 3: android.release_config_proto.flag_artifact.traces:type_name -> android.release_config_proto.tracepoint
+	1, // 4: android.release_config_proto.release_config_artifact.flag_artifacts:type_name -> android.release_config_proto.flag_artifact
+	2, // 5: android.release_config_proto.release_configs_artifact.release_config:type_name -> android.release_config_proto.release_config_artifact
+	2, // 6: android.release_config_proto.release_configs_artifact.other_release_configs:type_name -> android.release_config_proto.release_config_artifact
+	7, // [7:7] is the sub-list for method output_type
+	7, // [7:7] is the sub-list for method input_type
+	7, // [7:7] is the sub-list for extension type_name
+	7, // [7:7] is the sub-list for extension extendee
+	0, // [0:7] is the sub-list for field type_name
+}
+
+func init() { file_build_flags_out_proto_init() }
+func file_build_flags_out_proto_init() {
+	if File_build_flags_out_proto != nil {
+		return
+	}
+	file_build_flags_src_proto_init()
+	if !protoimpl.UnsafeEnabled {
+		file_build_flags_out_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Tracepoint); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_out_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FlagArtifact); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_out_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ReleaseConfigArtifact); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_out_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ReleaseConfigsArtifact); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_build_flags_out_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_build_flags_out_proto_goTypes,
+		DependencyIndexes: file_build_flags_out_proto_depIdxs,
+		MessageInfos:      file_build_flags_out_proto_msgTypes,
+	}.Build()
+	File_build_flags_out_proto = out.File
+	file_build_flags_out_proto_rawDesc = nil
+	file_build_flags_out_proto_goTypes = nil
+	file_build_flags_out_proto_depIdxs = nil
+}
diff --git a/cmd/release_config/release_config_proto/build_flags_out.proto b/cmd/release_config/release_config_proto/build_flags_out.proto
new file mode 100644
index 0000000..fd8487b
--- /dev/null
+++ b/cmd/release_config/release_config_proto/build_flags_out.proto
@@ -0,0 +1,86 @@
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto2";
+package android.release_config_proto;
+option go_package = "android/soong/release_config/release_config_proto";
+
+import "build_flags_src.proto";
+
+// This protobuf file defines messages used to represent the release config for
+// the android build system, delivered as a build artifact for use by tools such
+// as Gantry.
+//
+// The following format requirements apply across various message fields:
+//
+// # name: name of the flag
+//
+//    format: an uppercase string in SNAKE_CASE format starting with RELEASE_,
+//      no consecutive underscores, and no leading digit. For example
+//      RELEASE_MY_PACKAGE_FLAG is a valid name, while MY_PACKAGE_FLAG, and
+//      RELEASE_MY_PACKAGE__FLAG are invalid.
+//
+// # package: package to which the flag belongs
+//
+//    format: lowercase strings in snake_case format, delimited by dots, no
+//      consecutive underscores and no leading digit in each string. For example
+//      com.android.mypackage is a valid name while com.android.myPackage,
+//      com.android.1mypackage are invalid
+
+message tracepoint {
+  // Path to declaration or value file relative to $TOP
+  optional string source = 1;
+  optional value value = 201;
+}
+
+message flag_artifact {
+  // The original declaration
+  optional flag_declaration flag_declaration = 1;
+
+  // Value for the flag
+  optional value value = 201;
+
+  // Trace of where the flag value was assigned.
+  repeated tracepoint traces = 8;
+}
+
+message release_config_artifact {
+  // The name of the release config.
+  // See # name for format detail
+  optional string name = 1;
+
+  // Other names by which this release is known (for example, `next`)
+  repeated string other_names = 2;
+
+  // The complete set of build flags in this release config, after all
+  // inheritance and other processing is complete.
+  repeated flag_artifact flag_artifacts = 3;
+
+  // The (complete) list of aconfig_value_sets Soong modules to use.
+  repeated string aconfig_value_sets = 4;
+
+  // The names of the release_config_artifacts from which we inherited.
+  // Included for reference only.
+  repeated string inherits = 5;
+
+  // The release config directories used for this config.
+  // For example, "build/release".
+  repeated string directories = 6;
+}
+
+message release_configs_artifact {
+  // The active release config for this build.
+  optional release_config_artifact release_config = 1;
+
+  // All other release configs defined for this TARGET_PRODUCT.
+  repeated release_config_artifact other_release_configs = 2;
+}
+
diff --git a/cmd/release_config/release_config_proto/build_flags_src.pb.go b/cmd/release_config/release_config_proto/build_flags_src.pb.go
new file mode 100644
index 0000000..0f2c30b
--- /dev/null
+++ b/cmd/release_config/release_config_proto/build_flags_src.pb.go
@@ -0,0 +1,855 @@
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.33.0
+// 	protoc        v3.21.12
+// source: build_flags_src.proto
+
+package release_config_proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Workflow int32
+
+const (
+	Workflow_UNSPECIFIED_workflow Workflow = 0
+	// Boolean value flags that progress from false to true.
+	Workflow_LAUNCH Workflow = 1
+	// String value flags that get updated with new version strings to control
+	// prebuilt inclusion.
+	Workflow_PREBUILT Workflow = 2
+	// Manually managed outside flags.  These are likely to be found in a
+	// different directory than flags with other workflows.
+	Workflow_MANUAL Workflow = 3
+)
+
+// Enum value maps for Workflow.
+var (
+	Workflow_name = map[int32]string{
+		0: "UNSPECIFIED_workflow",
+		1: "LAUNCH",
+		2: "PREBUILT",
+		3: "MANUAL",
+	}
+	Workflow_value = map[string]int32{
+		"UNSPECIFIED_workflow": 0,
+		"LAUNCH":               1,
+		"PREBUILT":             2,
+		"MANUAL":               3,
+	}
+)
+
+func (x Workflow) Enum() *Workflow {
+	p := new(Workflow)
+	*p = x
+	return p
+}
+
+func (x Workflow) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Workflow) Descriptor() protoreflect.EnumDescriptor {
+	return file_build_flags_src_proto_enumTypes[0].Descriptor()
+}
+
+func (Workflow) Type() protoreflect.EnumType {
+	return &file_build_flags_src_proto_enumTypes[0]
+}
+
+func (x Workflow) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Do not use.
+func (x *Workflow) UnmarshalJSON(b []byte) error {
+	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
+	if err != nil {
+		return err
+	}
+	*x = Workflow(num)
+	return nil
+}
+
+// Deprecated: Use Workflow.Descriptor instead.
+func (Workflow) EnumDescriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{0}
+}
+
+type Container int32
+
+const (
+	Container_UNSPECIFIED_container Container = 0
+	// All containers
+	Container_ALL Container = 1
+	// Specific containers
+	Container_PRODUCT    Container = 2
+	Container_SYSTEM     Container = 3
+	Container_SYSTEM_EXT Container = 4
+	Container_VENDOR     Container = 5
+)
+
+// Enum value maps for Container.
+var (
+	Container_name = map[int32]string{
+		0: "UNSPECIFIED_container",
+		1: "ALL",
+		2: "PRODUCT",
+		3: "SYSTEM",
+		4: "SYSTEM_EXT",
+		5: "VENDOR",
+	}
+	Container_value = map[string]int32{
+		"UNSPECIFIED_container": 0,
+		"ALL":                   1,
+		"PRODUCT":               2,
+		"SYSTEM":                3,
+		"SYSTEM_EXT":            4,
+		"VENDOR":                5,
+	}
+)
+
+func (x Container) Enum() *Container {
+	p := new(Container)
+	*p = x
+	return p
+}
+
+func (x Container) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Container) Descriptor() protoreflect.EnumDescriptor {
+	return file_build_flags_src_proto_enumTypes[1].Descriptor()
+}
+
+func (Container) Type() protoreflect.EnumType {
+	return &file_build_flags_src_proto_enumTypes[1]
+}
+
+func (x Container) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Do not use.
+func (x *Container) UnmarshalJSON(b []byte) error {
+	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
+	if err != nil {
+		return err
+	}
+	*x = Container(num)
+	return nil
+}
+
+// Deprecated: Use Container.Descriptor instead.
+func (Container) EnumDescriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{1}
+}
+
+type Value struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Types that are assignable to Val:
+	//
+	//	*Value_UnspecifiedValue
+	//	*Value_StringValue
+	//	*Value_BoolValue
+	//	*Value_Obsolete
+	Val isValue_Val `protobuf_oneof:"val"`
+}
+
+func (x *Value) Reset() {
+	*x = Value{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Value) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Value) ProtoMessage() {}
+
+func (x *Value) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Value.ProtoReflect.Descriptor instead.
+func (*Value) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{0}
+}
+
+func (m *Value) GetVal() isValue_Val {
+	if m != nil {
+		return m.Val
+	}
+	return nil
+}
+
+func (x *Value) GetUnspecifiedValue() bool {
+	if x, ok := x.GetVal().(*Value_UnspecifiedValue); ok {
+		return x.UnspecifiedValue
+	}
+	return false
+}
+
+func (x *Value) GetStringValue() string {
+	if x, ok := x.GetVal().(*Value_StringValue); ok {
+		return x.StringValue
+	}
+	return ""
+}
+
+func (x *Value) GetBoolValue() bool {
+	if x, ok := x.GetVal().(*Value_BoolValue); ok {
+		return x.BoolValue
+	}
+	return false
+}
+
+func (x *Value) GetObsolete() bool {
+	if x, ok := x.GetVal().(*Value_Obsolete); ok {
+		return x.Obsolete
+	}
+	return false
+}
+
+type isValue_Val interface {
+	isValue_Val()
+}
+
+type Value_UnspecifiedValue struct {
+	UnspecifiedValue bool `protobuf:"varint,200,opt,name=unspecified_value,json=unspecifiedValue,oneof"`
+}
+
+type Value_StringValue struct {
+	StringValue string `protobuf:"bytes,201,opt,name=string_value,json=stringValue,oneof"`
+}
+
+type Value_BoolValue struct {
+	BoolValue bool `protobuf:"varint,202,opt,name=bool_value,json=boolValue,oneof"`
+}
+
+type Value_Obsolete struct {
+	// If true, the flag is obsolete.  Assigning it further will be flagged.
+	Obsolete bool `protobuf:"varint,203,opt,name=obsolete,oneof"`
+}
+
+func (*Value_UnspecifiedValue) isValue_Val() {}
+
+func (*Value_StringValue) isValue_Val() {}
+
+func (*Value_BoolValue) isValue_Val() {}
+
+func (*Value_Obsolete) isValue_Val() {}
+
+// The proto used in the source tree.
+type FlagDeclaration struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The name of the flag.
+	// See # name for format detail
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Text description of the flag's purpose.
+	Description *string `protobuf:"bytes,3,opt,name=description" json:"description,omitempty"`
+	// Value for the flag
+	Value *Value `protobuf:"bytes,201,opt,name=value" json:"value,omitempty"`
+	// Workflow for this flag.
+	Workflow *Workflow `protobuf:"varint,205,opt,name=workflow,enum=android.release_config_proto.Workflow" json:"workflow,omitempty"`
+	// The container for this flag.  This overrides any default container given
+	// in the release_config_map message.
+	Container *Container `protobuf:"varint,206,opt,name=container,enum=android.release_config_proto.Container" json:"container,omitempty"`
+	// Temporarily allow origin at the flag declaration level while we
+	// move flags to their own locations.
+	Origin *string `protobuf:"bytes,208,opt,name=origin" json:"origin,omitempty"`
+}
+
+func (x *FlagDeclaration) Reset() {
+	*x = FlagDeclaration{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FlagDeclaration) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FlagDeclaration) ProtoMessage() {}
+
+func (x *FlagDeclaration) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FlagDeclaration.ProtoReflect.Descriptor instead.
+func (*FlagDeclaration) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *FlagDeclaration) GetName() string {
+	if x != nil && x.Name != nil {
+		return *x.Name
+	}
+	return ""
+}
+
+func (x *FlagDeclaration) GetDescription() string {
+	if x != nil && x.Description != nil {
+		return *x.Description
+	}
+	return ""
+}
+
+func (x *FlagDeclaration) GetValue() *Value {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *FlagDeclaration) GetWorkflow() Workflow {
+	if x != nil && x.Workflow != nil {
+		return *x.Workflow
+	}
+	return Workflow_UNSPECIFIED_workflow
+}
+
+func (x *FlagDeclaration) GetContainer() Container {
+	if x != nil && x.Container != nil {
+		return *x.Container
+	}
+	return Container_UNSPECIFIED_container
+}
+
+func (x *FlagDeclaration) GetOrigin() string {
+	if x != nil && x.Origin != nil {
+		return *x.Origin
+	}
+	return ""
+}
+
+type FlagValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Name of the flag.
+	// See # name for format detail
+	Name *string `protobuf:"bytes,2,opt,name=name" json:"name,omitempty"`
+	// Value for the flag
+	Value *Value `protobuf:"bytes,201,opt,name=value" json:"value,omitempty"`
+}
+
+func (x *FlagValue) Reset() {
+	*x = FlagValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FlagValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FlagValue) ProtoMessage() {}
+
+func (x *FlagValue) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FlagValue.ProtoReflect.Descriptor instead.
+func (*FlagValue) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *FlagValue) GetName() string {
+	if x != nil && x.Name != nil {
+		return *x.Name
+	}
+	return ""
+}
+
+func (x *FlagValue) GetValue() *Value {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+// This replaces $(call declare-release-config).
+type ReleaseConfig struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The name of the release config.
+	// See # name for format detail
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// From which other release configs does this one inherit?
+	Inherits []string `protobuf:"bytes,2,rep,name=inherits" json:"inherits,omitempty"`
+	// List of names of the aconfig_value_set soong module(s) for this
+	// contribution.
+	AconfigValueSets []string `protobuf:"bytes,3,rep,name=aconfig_value_sets,json=aconfigValueSets" json:"aconfig_value_sets,omitempty"`
+}
+
+func (x *ReleaseConfig) Reset() {
+	*x = ReleaseConfig{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReleaseConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReleaseConfig) ProtoMessage() {}
+
+func (x *ReleaseConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReleaseConfig.ProtoReflect.Descriptor instead.
+func (*ReleaseConfig) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *ReleaseConfig) GetName() string {
+	if x != nil && x.Name != nil {
+		return *x.Name
+	}
+	return ""
+}
+
+func (x *ReleaseConfig) GetInherits() []string {
+	if x != nil {
+		return x.Inherits
+	}
+	return nil
+}
+
+func (x *ReleaseConfig) GetAconfigValueSets() []string {
+	if x != nil {
+		return x.AconfigValueSets
+	}
+	return nil
+}
+
+// Any aliases.  These are used for continuous integration builder config.
+type ReleaseAlias struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The name of the alias.
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// The release that `name` is an alias for.
+	Target *string `protobuf:"bytes,2,opt,name=target" json:"target,omitempty"`
+}
+
+func (x *ReleaseAlias) Reset() {
+	*x = ReleaseAlias{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReleaseAlias) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReleaseAlias) ProtoMessage() {}
+
+func (x *ReleaseAlias) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReleaseAlias.ProtoReflect.Descriptor instead.
+func (*ReleaseAlias) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *ReleaseAlias) GetName() string {
+	if x != nil && x.Name != nil {
+		return *x.Name
+	}
+	return ""
+}
+
+func (x *ReleaseAlias) GetTarget() string {
+	if x != nil && x.Target != nil {
+		return *x.Target
+	}
+	return ""
+}
+
+// This provides the data from release_config_map.mk
+type ReleaseConfigMap struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Any aliases.
+	Aliases []*ReleaseAlias `protobuf:"bytes,1,rep,name=aliases" json:"aliases,omitempty"`
+	// The origin for flags declared here.
+	Origin *string `protobuf:"bytes,2,opt,name=origin" json:"origin,omitempty"`
+	// The default container for flags declared here.
+	DefaultContainer *Container `protobuf:"varint,3,opt,name=default_container,json=defaultContainer,enum=android.release_config_proto.Container" json:"default_container,omitempty"`
+}
+
+func (x *ReleaseConfigMap) Reset() {
+	*x = ReleaseConfigMap{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_build_flags_src_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReleaseConfigMap) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReleaseConfigMap) ProtoMessage() {}
+
+func (x *ReleaseConfigMap) ProtoReflect() protoreflect.Message {
+	mi := &file_build_flags_src_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReleaseConfigMap.ProtoReflect.Descriptor instead.
+func (*ReleaseConfigMap) Descriptor() ([]byte, []int) {
+	return file_build_flags_src_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *ReleaseConfigMap) GetAliases() []*ReleaseAlias {
+	if x != nil {
+		return x.Aliases
+	}
+	return nil
+}
+
+func (x *ReleaseConfigMap) GetOrigin() string {
+	if x != nil && x.Origin != nil {
+		return *x.Origin
+	}
+	return ""
+}
+
+func (x *ReleaseConfigMap) GetDefaultContainer() Container {
+	if x != nil && x.DefaultContainer != nil {
+		return *x.DefaultContainer
+	}
+	return Container_UNSPECIFIED_container
+}
+
+var File_build_flags_src_proto protoreflect.FileDescriptor
+
+var file_build_flags_src_proto_rawDesc = []byte{
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+	0x50, 0x52, 0x4f, 0x44, 0x55, 0x43, 0x54, 0x10, 0x02, 0x12, 0x0a, 0x0a, 0x06, 0x53, 0x59, 0x53,
+	0x54, 0x45, 0x4d, 0x10, 0x03, 0x12, 0x0e, 0x0a, 0x0a, 0x53, 0x59, 0x53, 0x54, 0x45, 0x4d, 0x5f,
+	0x45, 0x58, 0x54, 0x10, 0x04, 0x12, 0x0a, 0x0a, 0x06, 0x56, 0x45, 0x4e, 0x44, 0x4f, 0x52, 0x10,
+	0x05, 0x42, 0x33, 0x5a, 0x31, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f, 0x73, 0x6f, 0x6f,
+	0x6e, 0x67, 0x2f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69,
+	0x67, 0x2f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
+	0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+}
+
+var (
+	file_build_flags_src_proto_rawDescOnce sync.Once
+	file_build_flags_src_proto_rawDescData = file_build_flags_src_proto_rawDesc
+)
+
+func file_build_flags_src_proto_rawDescGZIP() []byte {
+	file_build_flags_src_proto_rawDescOnce.Do(func() {
+		file_build_flags_src_proto_rawDescData = protoimpl.X.CompressGZIP(file_build_flags_src_proto_rawDescData)
+	})
+	return file_build_flags_src_proto_rawDescData
+}
+
+var file_build_flags_src_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_build_flags_src_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_build_flags_src_proto_goTypes = []interface{}{
+	(Workflow)(0),            // 0: android.release_config_proto.workflow
+	(Container)(0),           // 1: android.release_config_proto.container
+	(*Value)(nil),            // 2: android.release_config_proto.value
+	(*FlagDeclaration)(nil),  // 3: android.release_config_proto.flag_declaration
+	(*FlagValue)(nil),        // 4: android.release_config_proto.flag_value
+	(*ReleaseConfig)(nil),    // 5: android.release_config_proto.release_config
+	(*ReleaseAlias)(nil),     // 6: android.release_config_proto.release_alias
+	(*ReleaseConfigMap)(nil), // 7: android.release_config_proto.release_config_map
+}
+var file_build_flags_src_proto_depIdxs = []int32{
+	2, // 0: android.release_config_proto.flag_declaration.value:type_name -> android.release_config_proto.value
+	0, // 1: android.release_config_proto.flag_declaration.workflow:type_name -> android.release_config_proto.workflow
+	1, // 2: android.release_config_proto.flag_declaration.container:type_name -> android.release_config_proto.container
+	2, // 3: android.release_config_proto.flag_value.value:type_name -> android.release_config_proto.value
+	6, // 4: android.release_config_proto.release_config_map.aliases:type_name -> android.release_config_proto.release_alias
+	1, // 5: android.release_config_proto.release_config_map.default_container:type_name -> android.release_config_proto.container
+	6, // [6:6] is the sub-list for method output_type
+	6, // [6:6] is the sub-list for method input_type
+	6, // [6:6] is the sub-list for extension type_name
+	6, // [6:6] is the sub-list for extension extendee
+	0, // [0:6] is the sub-list for field type_name
+}
+
+func init() { file_build_flags_src_proto_init() }
+func file_build_flags_src_proto_init() {
+	if File_build_flags_src_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_build_flags_src_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Value); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_src_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FlagDeclaration); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_src_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FlagValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_src_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ReleaseConfig); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_src_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ReleaseAlias); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_build_flags_src_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ReleaseConfigMap); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_build_flags_src_proto_msgTypes[0].OneofWrappers = []interface{}{
+		(*Value_UnspecifiedValue)(nil),
+		(*Value_StringValue)(nil),
+		(*Value_BoolValue)(nil),
+		(*Value_Obsolete)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_build_flags_src_proto_rawDesc,
+			NumEnums:      2,
+			NumMessages:   6,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_build_flags_src_proto_goTypes,
+		DependencyIndexes: file_build_flags_src_proto_depIdxs,
+		EnumInfos:         file_build_flags_src_proto_enumTypes,
+		MessageInfos:      file_build_flags_src_proto_msgTypes,
+	}.Build()
+	File_build_flags_src_proto = out.File
+	file_build_flags_src_proto_rawDesc = nil
+	file_build_flags_src_proto_goTypes = nil
+	file_build_flags_src_proto_depIdxs = nil
+}
diff --git a/cmd/release_config/release_config_proto/build_flags_src.proto b/cmd/release_config/release_config_proto/build_flags_src.proto
new file mode 100644
index 0000000..0662716
--- /dev/null
+++ b/cmd/release_config/release_config_proto/build_flags_src.proto
@@ -0,0 +1,154 @@
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto2";
+package android.release_config_proto;
+option go_package = "android/soong/release_config/release_config_proto";
+
+// This protobuf file defines messages used to represent the build flags used by
+// a release in a more human-editable form.  It is used for on-disk files in the
+// source tree.
+//
+// The following format requirements apply across various message fields:
+//
+// # name: name of the flag
+//
+//    format: an uppercase string in SNAKE_CASE format starting with RELEASE_,
+//      no consecutive underscores, and no leading digit. For example
+//      RELEASE_MY_PACKAGE_FLAG is a valid name, while MY_PACKAGE_FLAG, and
+//      RELEASE_MY_PACKAGE__FLAG are invalid.
+//
+// # package: package to which the flag belongs
+//
+//    format: lowercase strings in snake_case format, delimited by dots, no
+//      consecutive underscores and no leading digit in each string. For example
+//      com.android.mypackage is a valid name while com.android.myPackage,
+//      com.android.1mypackage are invalid
+
+enum workflow {
+  UNSPECIFIED_workflow = 0;
+
+  // Boolean value flags that progress from false to true.
+  LAUNCH = 1;
+
+  // String value flags that get updated with new version strings to control
+  // prebuilt inclusion.
+  PREBUILT = 2;
+
+  // Manually managed outside flags.  These are likely to be found in a
+  // different directory than flags with other workflows.
+  MANUAL = 3;
+}
+
+enum container {
+  UNSPECIFIED_container = 0;
+
+  // All containers
+  ALL = 1;
+
+  // Specific containers
+  PRODUCT = 2;
+  SYSTEM = 3;
+  SYSTEM_EXT = 4;
+  VENDOR = 5;
+}
+
+message value {
+  oneof val {
+    bool unspecified_value = 200;
+    string string_value = 201;
+    bool bool_value = 202;
+    // If true, the flag is obsolete.  Assigning it further will be flagged.
+    bool obsolete = 203;
+  }
+}
+
+// The proto used in the source tree.
+message flag_declaration {
+  // The name of the flag.
+  // See # name for format detail
+  optional string name = 1;
+
+  // Text description of the flag's purpose.
+  optional string description = 3;
+
+  // reserve this for bug, if needed.
+  reserved 4;
+
+  // Value for the flag
+  optional value value = 201;
+
+  // Workflow for this flag.
+  optional workflow workflow = 205;
+
+  // The container for this flag.  This overrides any default container given
+  // in the release_config_map message.
+  optional container container = 206;
+
+  // The package associated with this flag.
+  // (when Gantry is ready for it) optional string package = 207;
+  reserved 207;
+
+  // Temporarily allow origin at the flag declaration level while we
+  // move flags to their own locations.
+  optional string origin = 208;
+
+  // TODO: do we want to include "first used in" (= ap2a)?
+}
+
+message flag_value {
+  // Name of the flag.
+  // See # name for format detail
+  optional string name = 2;
+
+  // Value for the flag
+  optional value value = 201;
+}
+
+// This replaces $(call declare-release-config).
+message release_config {
+  // The name of the release config.
+  // See # name for format detail
+  optional string name = 1;
+
+  // From which other release configs does this one inherit?
+  repeated string inherits = 2;
+
+  // List of names of the aconfig_value_set soong module(s) for this
+  // contribution.
+  repeated string aconfig_value_sets = 3;
+}
+
+// Any aliases.  These are used for continuous integration builder config.
+message release_alias {
+  // The name of the alias.
+  optional string name = 1;
+
+  // The release that `name` is an alias for.
+  optional string target = 2;
+}
+
+// This provides the data from release_config_map.mk
+message release_config_map {
+  // Any aliases.
+  repeated release_alias aliases = 1;
+
+  // The origin for flags declared here.
+  optional string origin = 2;
+
+  // The default container for flags declared here.
+  optional container default_container = 3;
+
+  // If needed, we can add these fields instead of hardcoding the location.
+  // Flag declarations: `flag_declarations/*.textproto`
+  // Release config contributions: `release_configs/*.textproto`
+  // Flag values: `flag_values/{RELEASE_NAME}/*.textproto`
+}
diff --git a/cmd/release_config/release_config_proto/regen.sh b/cmd/release_config/release_config_proto/regen.sh
new file mode 100644
index 0000000..1846c4d
--- /dev/null
+++ b/cmd/release_config/release_config_proto/regen.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+aprotoc --go_out=paths=source_relative:. build_flags_src.proto build_flags_out.proto