diff --git a/tools/aconfig/Cargo.toml b/tools/aconfig/Cargo.toml
index 7b58e94..8d93261 100644
--- a/tools/aconfig/Cargo.toml
+++ b/tools/aconfig/Cargo.toml
@@ -1,22 +1,7 @@
-[package]
-name = "aconfig"
-version = "0.1.0"
-edition = "2021"
-build = "build.rs"
+[workspace]
 
-[features]
-default = ["cargo"]
-cargo = []
-
-[dependencies]
-anyhow = "1.0.69"
-clap = { version = "4.1.8", features = ["derive"] }
-itertools = "0.10.5"
-paste = "1.0.11"
-protobuf = "3.2.0"
-serde = { version = "1.0.152", features = ["derive"] }
-serde_json = "1.0.93"
-tinytemplate = "1.2.1"
-
-[build-dependencies]
-protobuf-codegen = "3.2.0"
+members = [
+    "aconfig",
+    "aconfig_protos",
+    "printflags"
+]
diff --git a/tools/aconfig/Android.bp b/tools/aconfig/aconfig/Android.bp
similarity index 85%
rename from tools/aconfig/Android.bp
rename to tools/aconfig/aconfig/Android.bp
index 0f9561d..3be456c 100644
--- a/tools/aconfig/Android.bp
+++ b/tools/aconfig/aconfig/Android.bp
@@ -2,51 +2,6 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
-// proto libraries for consumers of `aconfig dump --format=protobuf` output
-
-java_library {
-    name: "libaconfig_java_proto_lite",
-    host_supported: true,
-    srcs: ["protos/aconfig.proto"],
-    static_libs: ["libprotobuf-java-lite"],
-    proto: {
-        type: "lite",
-    },
-    sdk_version: "current",
-    min_sdk_version: "34",
-    apex_available: [
-        "com.android.configinfrastructure",
-        "//apex_available:platform",
-    ]
-}
-
-java_library_host {
-    name: "libaconfig_java_proto_full",
-    srcs: ["protos/aconfig.proto"],
-    static_libs: ["libprotobuf-java-full"],
-    proto: {
-        type: "full",
-    },
-}
-
-python_library_host {
-    name: "libaconfig_python_proto",
-    srcs: ["protos/aconfig.proto"],
-    proto: {
-        canonical_path_from_root: false,
-    },
-}
-
-// host binary: aconfig
-
-rust_protobuf {
-    name: "libaconfig_protos",
-    protos: ["protos/aconfig.proto"],
-    crate_name: "aconfig_protos",
-    source_stem: "aconfig_protos",
-    host_supported: true,
-}
-
 rust_defaults {
     name: "aconfig.defaults",
     edition: "2021",
@@ -63,9 +18,6 @@
         "libserde_json",
         "libtinytemplate",
     ],
-    proc_macros: [
-        "libpaste",
-    ]
 }
 
 rust_binary_host {
diff --git a/tools/aconfig/aconfig/Cargo.toml b/tools/aconfig/aconfig/Cargo.toml
new file mode 100644
index 0000000..01ad8c6
--- /dev/null
+++ b/tools/aconfig/aconfig/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "aconfig"
+version = "0.1.0"
+edition = "2021"
+
+[features]
+default = ["cargo"]
+cargo = []
+
+[dependencies]
+anyhow = "1.0.69"
+clap = { version = "4.1.8", features = ["derive"] }
+itertools = "0.10.5"
+protobuf = "3.2.0"
+serde = { version = "1.0.152", features = ["derive"] }
+serde_json = "1.0.93"
+tinytemplate = "1.2.1"
+aconfig_protos = { path = "../aconfig_protos" }
diff --git a/tools/aconfig/src/codegen/cpp.rs b/tools/aconfig/aconfig/src/codegen/cpp.rs
similarity index 99%
rename from tools/aconfig/src/codegen/cpp.rs
rename to tools/aconfig/aconfig/src/codegen/cpp.rs
index 1279d8e..cd71b10 100644
--- a/tools/aconfig/src/codegen/cpp.rs
+++ b/tools/aconfig/aconfig/src/codegen/cpp.rs
@@ -19,10 +19,11 @@
 use std::path::PathBuf;
 use tinytemplate::TinyTemplate;
 
+use aconfig_protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
+
 use crate::codegen;
 use crate::codegen::CodegenMode;
 use crate::commands::OutputFile;
-use crate::protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
 
 pub fn generate_cpp_code<I>(
     package: &str,
@@ -136,7 +137,7 @@
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::protos::ProtoParsedFlags;
+    use aconfig_protos::ProtoParsedFlags;
     use std::collections::HashMap;
 
     const EXPORTED_PROD_HEADER_EXPECTED: &str = r#"
diff --git a/tools/aconfig/src/codegen/java.rs b/tools/aconfig/aconfig/src/codegen/java.rs
similarity index 99%
rename from tools/aconfig/src/codegen/java.rs
rename to tools/aconfig/aconfig/src/codegen/java.rs
index 78e892b..7ce1d51 100644
--- a/tools/aconfig/src/codegen/java.rs
+++ b/tools/aconfig/aconfig/src/codegen/java.rs
@@ -20,10 +20,11 @@
 use std::path::PathBuf;
 use tinytemplate::TinyTemplate;
 
+use aconfig_protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
+
 use crate::codegen;
 use crate::codegen::CodegenMode;
 use crate::commands::OutputFile;
-use crate::protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
 
 pub fn generate_java_code<I>(
     package: &str,
diff --git a/tools/aconfig/src/codegen/mod.rs b/tools/aconfig/aconfig/src/codegen/mod.rs
similarity index 86%
rename from tools/aconfig/src/codegen/mod.rs
rename to tools/aconfig/aconfig/src/codegen/mod.rs
index 64ffa8b..7b2336f 100644
--- a/tools/aconfig/src/codegen/mod.rs
+++ b/tools/aconfig/aconfig/src/codegen/mod.rs
@@ -20,32 +20,7 @@
 
 use anyhow::{ensure, Result};
 use clap::ValueEnum;
-
-pub fn is_valid_name_ident(s: &str) -> bool {
-    // Identifiers must match [a-z][a-z0-9_]*, except consecutive underscores are not allowed
-    if s.contains("__") {
-        return false;
-    }
-    let mut chars = s.chars();
-    let Some(first) = chars.next() else {
-        return false;
-    };
-    if !first.is_ascii_lowercase() {
-        return false;
-    }
-    chars.all(|ch| ch.is_ascii_lowercase() || ch.is_ascii_digit() || ch == '_')
-}
-
-pub fn is_valid_package_ident(s: &str) -> bool {
-    if !s.contains('.') {
-        return false;
-    }
-    s.split('.').all(is_valid_name_ident)
-}
-
-pub fn is_valid_container_ident(s: &str) -> bool {
-    s.split('.').all(is_valid_name_ident)
-}
+use aconfig_protos::{is_valid_name_ident, is_valid_package_ident};
 
 pub fn create_device_config_ident(package: &str, flag_name: &str) -> Result<String> {
     ensure!(is_valid_package_ident(package), "bad package");
@@ -75,6 +50,7 @@
 #[cfg(test)]
 mod tests {
     use super::*;
+    use aconfig_protos::is_valid_container_ident;
 
     #[test]
     fn test_is_valid_name_ident() {
diff --git a/tools/aconfig/src/codegen/rust.rs b/tools/aconfig/aconfig/src/codegen/rust.rs
similarity index 99%
rename from tools/aconfig/src/codegen/rust.rs
rename to tools/aconfig/aconfig/src/codegen/rust.rs
index 8a88ffe..33c3d37 100644
--- a/tools/aconfig/src/codegen/rust.rs
+++ b/tools/aconfig/aconfig/src/codegen/rust.rs
@@ -18,10 +18,11 @@
 use serde::Serialize;
 use tinytemplate::TinyTemplate;
 
+use aconfig_protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
+
 use crate::codegen;
 use crate::codegen::CodegenMode;
 use crate::commands::OutputFile;
-use crate::protos::{ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag};
 
 pub fn generate_rust_code<I>(
     package: &str,
diff --git a/tools/aconfig/src/commands.rs b/tools/aconfig/aconfig/src/commands.rs
similarity index 95%
rename from tools/aconfig/src/commands.rs
rename to tools/aconfig/aconfig/src/commands.rs
index a35ad08..93bc436 100644
--- a/tools/aconfig/src/commands.rs
+++ b/tools/aconfig/aconfig/src/commands.rs
@@ -26,7 +26,7 @@
 use crate::codegen::rust::generate_rust_code;
 use crate::codegen::CodegenMode;
 use crate::dump::{DumpFormat, DumpPredicate};
-use crate::protos::{
+use aconfig_protos::{
     ParsedFlagExt, ProtoFlagMetadata, ProtoFlagPermission, ProtoFlagState, ProtoParsedFlag,
     ProtoParsedFlags, ProtoTracepoint,
 };
@@ -44,7 +44,7 @@
         self.reader
             .read_to_end(&mut buffer)
             .with_context(|| format!("failed to read {}", self.source))?;
-        crate::protos::parsed_flags::try_from_binary_proto(&buffer)
+        aconfig_protos::parsed_flags::try_from_binary_proto(&buffer)
             .with_context(|| self.error_context())
     }
 
@@ -77,7 +77,7 @@
             .read_to_string(&mut contents)
             .with_context(|| format!("failed to read {}", input.source))?;
 
-        let flag_declarations = crate::protos::flag_declarations::try_from_text_proto(&contents)
+        let flag_declarations = aconfig_protos::flag_declarations::try_from_text_proto(&contents)
             .with_context(|| input.error_context())?;
         ensure!(
             package == flag_declarations.package(),
@@ -96,7 +96,7 @@
             );
         }
         for mut flag_declaration in flag_declarations.flag.into_iter() {
-            crate::protos::flag_declaration::verify_fields(&flag_declaration)
+            aconfig_protos::flag_declaration::verify_fields(&flag_declaration)
                 .with_context(|| input.error_context())?;
 
             // create ParsedFlag using FlagDeclaration and default values
@@ -130,7 +130,7 @@
             parsed_flag.metadata = Some(metadata).into();
 
             // verify ParsedFlag looks reasonable
-            crate::protos::parsed_flag::verify_fields(&parsed_flag)?;
+            aconfig_protos::parsed_flag::verify_fields(&parsed_flag)?;
 
             // verify ParsedFlag can be added
             ensure!(
@@ -151,10 +151,10 @@
             .reader
             .read_to_string(&mut contents)
             .with_context(|| format!("failed to read {}", input.source))?;
-        let flag_values = crate::protos::flag_values::try_from_text_proto(&contents)
+        let flag_values = aconfig_protos::flag_values::try_from_text_proto(&contents)
             .with_context(|| input.error_context())?;
         for flag_value in flag_values.flag_value.into_iter() {
-            crate::protos::flag_value::verify_fields(&flag_value)
+            aconfig_protos::flag_value::verify_fields(&flag_value)
                 .with_context(|| input.error_context())?;
 
             let Some(parsed_flag) = parsed_flags
@@ -184,8 +184,8 @@
     }
 
     // Create a sorted parsed_flags
-    crate::protos::parsed_flags::sort_parsed_flags(&mut parsed_flags);
-    crate::protos::parsed_flags::verify_fields(&parsed_flags)?;
+    aconfig_protos::parsed_flags::sort_parsed_flags(&mut parsed_flags);
+    aconfig_protos::parsed_flags::verify_fields(&parsed_flags)?;
     let mut output = Vec::new();
     parsed_flags.write_to_vec(&mut output)?;
     Ok(output)
@@ -287,7 +287,7 @@
     let individually_parsed_flags: Result<Vec<ProtoParsedFlags>> =
         input.iter_mut().map(|i| i.try_parse_flags()).collect();
     let parsed_flags: ProtoParsedFlags =
-        crate::protos::parsed_flags::merge(individually_parsed_flags?, dedup)?;
+        aconfig_protos::parsed_flags::merge(individually_parsed_flags?, dedup)?;
     let filters: Vec<Box<DumpPredicate>> = if filters.is_empty() {
         vec![Box::new(|_| true)]
     } else {
@@ -386,16 +386,16 @@
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::protos::ProtoFlagPurpose;
+    use aconfig_protos::ProtoFlagPurpose;
 
     #[test]
     fn test_parse_flags() {
         let parsed_flags = crate::test::parse_test_flags(); // calls parse_flags
-        crate::protos::parsed_flags::verify_fields(&parsed_flags).unwrap();
+        aconfig_protos::parsed_flags::verify_fields(&parsed_flags).unwrap();
 
         let enabled_ro =
             parsed_flags.parsed_flag.iter().find(|pf| pf.name() == "enabled_ro").unwrap();
-        assert!(crate::protos::parsed_flag::verify_fields(enabled_ro).is_ok());
+        assert!(aconfig_protos::parsed_flag::verify_fields(enabled_ro).is_ok());
         assert_eq!("com.android.aconfig.test", enabled_ro.package());
         assert_eq!("enabled_ro", enabled_ro.name());
         assert_eq!("This flag is ENABLED + READ_ONLY", enabled_ro.description());
@@ -462,7 +462,7 @@
         )
         .unwrap();
         let parsed_flags =
-            crate::protos::parsed_flags::try_from_binary_proto(&flags_bytes).unwrap();
+            aconfig_protos::parsed_flags::try_from_binary_proto(&flags_bytes).unwrap();
         assert_eq!(1, parsed_flags.parsed_flag.len());
         let parsed_flag = parsed_flags.parsed_flag.first().unwrap();
         assert_eq!(ProtoFlagState::DISABLED, parsed_flag.state());
@@ -602,7 +602,7 @@
         )
         .unwrap();
         let parsed_flags =
-            crate::protos::parsed_flags::try_from_binary_proto(&flags_bytes).unwrap();
+            aconfig_protos::parsed_flags::try_from_binary_proto(&flags_bytes).unwrap();
         assert_eq!(1, parsed_flags.parsed_flag.len());
         let parsed_flag = parsed_flags.parsed_flag.first().unwrap();
         assert_eq!(ProtoFlagPurpose::PURPOSE_FEATURE, parsed_flag.metadata.purpose());
diff --git a/tools/aconfig/src/dump.rs b/tools/aconfig/aconfig/src/dump.rs
similarity index 98%
rename from tools/aconfig/src/dump.rs
rename to tools/aconfig/aconfig/src/dump.rs
index 37368ee..12352f9 100644
--- a/tools/aconfig/src/dump.rs
+++ b/tools/aconfig/aconfig/src/dump.rs
@@ -14,10 +14,10 @@
  * limitations under the License.
  */
 
-use crate::protos::{
+use aconfig_protos::{
     ParsedFlagExt, ProtoFlagMetadata, ProtoFlagPermission, ProtoFlagState, ProtoTracepoint,
 };
-use crate::protos::{ProtoParsedFlag, ProtoParsedFlags};
+use aconfig_protos::{ProtoParsedFlag, ProtoParsedFlags};
 use anyhow::{anyhow, bail, Context, Result};
 use protobuf::Message;
 
@@ -197,7 +197,7 @@
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::protos::ProtoParsedFlags;
+    use aconfig_protos::ProtoParsedFlags;
     use crate::test::parse_test_flags;
     use protobuf::Message;
 
diff --git a/tools/aconfig/src/main.rs b/tools/aconfig/aconfig/src/main.rs
similarity index 97%
rename from tools/aconfig/src/main.rs
rename to tools/aconfig/aconfig/src/main.rs
index 120e98c..30a7e9d 100644
--- a/tools/aconfig/src/main.rs
+++ b/tools/aconfig/aconfig/src/main.rs
@@ -27,7 +27,6 @@
 mod codegen;
 mod commands;
 mod dump;
-mod protos;
 mod storage;
 
 use codegen::CodegenMode;
@@ -57,8 +56,8 @@
                 .arg(
                     Arg::new("default-permission")
                         .long("default-permission")
-                        .value_parser(protos::flag_permission::parse_from_str)
-                        .default_value(protos::flag_permission::to_string(
+                        .value_parser(aconfig_protos::flag_permission::parse_from_str)
+                        .default_value(aconfig_protos::flag_permission::to_string(
                             &commands::DEFAULT_FLAG_PERMISSION,
                         )),
                 )
@@ -215,7 +214,7 @@
             let declarations = open_zero_or_more_files(sub_matches, "declarations")?;
             let values = open_zero_or_more_files(sub_matches, "values")?;
             let default_permission =
-                get_required_arg::<protos::ProtoFlagPermission>(sub_matches, "default-permission")?;
+                get_required_arg::<aconfig_protos::ProtoFlagPermission>(sub_matches, "default-permission")?;
             let output = commands::parse_flags(
                 package,
                 container,
diff --git a/tools/aconfig/src/storage/flag_table.rs b/tools/aconfig/aconfig/src/storage/flag_table.rs
similarity index 100%
rename from tools/aconfig/src/storage/flag_table.rs
rename to tools/aconfig/aconfig/src/storage/flag_table.rs
diff --git a/tools/aconfig/src/storage/flag_value.rs b/tools/aconfig/aconfig/src/storage/flag_value.rs
similarity index 99%
rename from tools/aconfig/src/storage/flag_value.rs
rename to tools/aconfig/aconfig/src/storage/flag_value.rs
index 45f5ec0..3c5bb17 100644
--- a/tools/aconfig/src/storage/flag_value.rs
+++ b/tools/aconfig/aconfig/src/storage/flag_value.rs
@@ -15,7 +15,7 @@
  */
 
 use crate::commands::assign_flag_ids;
-use crate::protos::ProtoFlagState;
+use aconfig_protos::ProtoFlagState;
 use crate::storage::{self, FlagPackage};
 use anyhow::{anyhow, Result};
 
diff --git a/tools/aconfig/src/storage/mod.rs b/tools/aconfig/aconfig/src/storage/mod.rs
similarity index 98%
rename from tools/aconfig/src/storage/mod.rs
rename to tools/aconfig/aconfig/src/storage/mod.rs
index b4a8b5e..4f2dc81 100644
--- a/tools/aconfig/src/storage/mod.rs
+++ b/tools/aconfig/aconfig/src/storage/mod.rs
@@ -22,7 +22,7 @@
 use std::collections::{hash_map::DefaultHasher, HashMap, HashSet};
 use std::hash::{Hash, Hasher};
 
-use crate::protos::{ProtoParsedFlag, ProtoParsedFlags};
+use aconfig_protos::{ProtoParsedFlag, ProtoParsedFlags};
 use crate::storage::{
     flag_table::FlagTable, flag_value::FlagValueList, package_table::PackageTable,
 };
@@ -221,7 +221,7 @@
                     crate::commands::DEFAULT_FLAG_PERMISSION,
                 )
                 .unwrap();
-                crate::protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
+                aconfig_protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
             })
             .collect()
     }
diff --git a/tools/aconfig/src/storage/package_table.rs b/tools/aconfig/aconfig/src/storage/package_table.rs
similarity index 100%
rename from tools/aconfig/src/storage/package_table.rs
rename to tools/aconfig/aconfig/src/storage/package_table.rs
diff --git a/tools/aconfig/src/test.rs b/tools/aconfig/aconfig/src/test.rs
similarity index 97%
rename from tools/aconfig/src/test.rs
rename to tools/aconfig/aconfig/src/test.rs
index cbb95b8..7b5318d 100644
--- a/tools/aconfig/src/test.rs
+++ b/tools/aconfig/aconfig/src/test.rs
@@ -17,7 +17,7 @@
 #[cfg(test)]
 pub mod test_utils {
     use crate::commands::Input;
-    use crate::protos::ProtoParsedFlags;
+    use aconfig_protos::ProtoParsedFlags;
     use itertools;
 
     pub const TEST_PACKAGE: &str = "com.android.aconfig.test";
@@ -265,7 +265,7 @@
             crate::commands::DEFAULT_FLAG_PERMISSION,
         )
         .unwrap();
-        crate::protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
+        aconfig_protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
     }
 
     pub fn parse_test_flags() -> ProtoParsedFlags {
@@ -289,7 +289,7 @@
             crate::commands::DEFAULT_FLAG_PERMISSION,
         )
         .unwrap();
-        crate::protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
+        aconfig_protos::parsed_flags::try_from_binary_proto(&bytes).unwrap()
     }
 
     pub fn first_significant_code_diff(a: &str, b: &str) -> Option<String> {
diff --git a/tools/aconfig/templates/FakeFeatureFlagsImpl.java.template b/tools/aconfig/aconfig/templates/FakeFeatureFlagsImpl.java.template
similarity index 100%
rename from tools/aconfig/templates/FakeFeatureFlagsImpl.java.template
rename to tools/aconfig/aconfig/templates/FakeFeatureFlagsImpl.java.template
diff --git a/tools/aconfig/templates/FeatureFlags.java.template b/tools/aconfig/aconfig/templates/FeatureFlags.java.template
similarity index 100%
rename from tools/aconfig/templates/FeatureFlags.java.template
rename to tools/aconfig/aconfig/templates/FeatureFlags.java.template
diff --git a/tools/aconfig/templates/FeatureFlagsImpl.java.template b/tools/aconfig/aconfig/templates/FeatureFlagsImpl.java.template
similarity index 100%
rename from tools/aconfig/templates/FeatureFlagsImpl.java.template
rename to tools/aconfig/aconfig/templates/FeatureFlagsImpl.java.template
diff --git a/tools/aconfig/templates/Flags.java.template b/tools/aconfig/aconfig/templates/Flags.java.template
similarity index 100%
rename from tools/aconfig/templates/Flags.java.template
rename to tools/aconfig/aconfig/templates/Flags.java.template
diff --git a/tools/aconfig/templates/cpp_exported_header.template b/tools/aconfig/aconfig/templates/cpp_exported_header.template
similarity index 100%
rename from tools/aconfig/templates/cpp_exported_header.template
rename to tools/aconfig/aconfig/templates/cpp_exported_header.template
diff --git a/tools/aconfig/templates/cpp_source_file.template b/tools/aconfig/aconfig/templates/cpp_source_file.template
similarity index 100%
rename from tools/aconfig/templates/cpp_source_file.template
rename to tools/aconfig/aconfig/templates/cpp_source_file.template
diff --git a/tools/aconfig/templates/rust.template b/tools/aconfig/aconfig/templates/rust.template
similarity index 100%
rename from tools/aconfig/templates/rust.template
rename to tools/aconfig/aconfig/templates/rust.template
diff --git a/tools/aconfig/templates/rust_test.template b/tools/aconfig/aconfig/templates/rust_test.template
similarity index 100%
rename from tools/aconfig/templates/rust_test.template
rename to tools/aconfig/aconfig/templates/rust_test.template
diff --git a/tools/aconfig/tests/AconfigHostTest.java b/tools/aconfig/aconfig/tests/AconfigHostTest.java
similarity index 100%
rename from tools/aconfig/tests/AconfigHostTest.java
rename to tools/aconfig/aconfig/tests/AconfigHostTest.java
diff --git a/tools/aconfig/tests/AconfigTest.java b/tools/aconfig/aconfig/tests/AconfigTest.java
similarity index 100%
rename from tools/aconfig/tests/AconfigTest.java
rename to tools/aconfig/aconfig/tests/AconfigTest.java
diff --git a/tools/aconfig/tests/AndroidManifest.xml b/tools/aconfig/aconfig/tests/AndroidManifest.xml
similarity index 100%
rename from tools/aconfig/tests/AndroidManifest.xml
rename to tools/aconfig/aconfig/tests/AndroidManifest.xml
diff --git a/tools/aconfig/tests/aconfig_exported_mode_test.cpp b/tools/aconfig/aconfig/tests/aconfig_exported_mode_test.cpp
similarity index 100%
rename from tools/aconfig/tests/aconfig_exported_mode_test.cpp
rename to tools/aconfig/aconfig/tests/aconfig_exported_mode_test.cpp
diff --git a/tools/aconfig/tests/aconfig_exported_mode_test.rs b/tools/aconfig/aconfig/tests/aconfig_exported_mode_test.rs
similarity index 100%
rename from tools/aconfig/tests/aconfig_exported_mode_test.rs
rename to tools/aconfig/aconfig/tests/aconfig_exported_mode_test.rs
diff --git a/tools/aconfig/tests/aconfig_force_read_only_mode_test.cpp b/tools/aconfig/aconfig/tests/aconfig_force_read_only_mode_test.cpp
similarity index 100%
rename from tools/aconfig/tests/aconfig_force_read_only_mode_test.cpp
rename to tools/aconfig/aconfig/tests/aconfig_force_read_only_mode_test.cpp
diff --git a/tools/aconfig/tests/aconfig_force_read_only_mode_test.rs b/tools/aconfig/aconfig/tests/aconfig_force_read_only_mode_test.rs
similarity index 100%
rename from tools/aconfig/tests/aconfig_force_read_only_mode_test.rs
rename to tools/aconfig/aconfig/tests/aconfig_force_read_only_mode_test.rs
diff --git a/tools/aconfig/tests/aconfig_prod_mode_test.rs b/tools/aconfig/aconfig/tests/aconfig_prod_mode_test.rs
similarity index 100%
rename from tools/aconfig/tests/aconfig_prod_mode_test.rs
rename to tools/aconfig/aconfig/tests/aconfig_prod_mode_test.rs
diff --git a/tools/aconfig/tests/aconfig_test.cpp b/tools/aconfig/aconfig/tests/aconfig_test.cpp
similarity index 100%
rename from tools/aconfig/tests/aconfig_test.cpp
rename to tools/aconfig/aconfig/tests/aconfig_test.cpp
diff --git a/tools/aconfig/tests/aconfig_test_mode_test.rs b/tools/aconfig/aconfig/tests/aconfig_test_mode_test.rs
similarity index 100%
rename from tools/aconfig/tests/aconfig_test_mode_test.rs
rename to tools/aconfig/aconfig/tests/aconfig_test_mode_test.rs
diff --git a/tools/aconfig/tests/aconfig_test_test_variant.cpp b/tools/aconfig/aconfig/tests/aconfig_test_test_variant.cpp
similarity index 100%
rename from tools/aconfig/tests/aconfig_test_test_variant.cpp
rename to tools/aconfig/aconfig/tests/aconfig_test_test_variant.cpp
diff --git a/tools/aconfig/tests/first.values b/tools/aconfig/aconfig/tests/first.values
similarity index 100%
rename from tools/aconfig/tests/first.values
rename to tools/aconfig/aconfig/tests/first.values
diff --git a/tools/aconfig/tests/read_only_test.aconfig b/tools/aconfig/aconfig/tests/read_only_test.aconfig
similarity index 100%
rename from tools/aconfig/tests/read_only_test.aconfig
rename to tools/aconfig/aconfig/tests/read_only_test.aconfig
diff --git a/tools/aconfig/tests/read_only_test.values b/tools/aconfig/aconfig/tests/read_only_test.values
similarity index 100%
rename from tools/aconfig/tests/read_only_test.values
rename to tools/aconfig/aconfig/tests/read_only_test.values
diff --git a/tools/aconfig/tests/second.values b/tools/aconfig/aconfig/tests/second.values
similarity index 100%
rename from tools/aconfig/tests/second.values
rename to tools/aconfig/aconfig/tests/second.values
diff --git a/tools/aconfig/tests/storage_test_1.aconfig b/tools/aconfig/aconfig/tests/storage_test_1.aconfig
similarity index 100%
rename from tools/aconfig/tests/storage_test_1.aconfig
rename to tools/aconfig/aconfig/tests/storage_test_1.aconfig
diff --git a/tools/aconfig/tests/storage_test_2.aconfig b/tools/aconfig/aconfig/tests/storage_test_2.aconfig
similarity index 100%
rename from tools/aconfig/tests/storage_test_2.aconfig
rename to tools/aconfig/aconfig/tests/storage_test_2.aconfig
diff --git a/tools/aconfig/tests/storage_test_4.aconfig b/tools/aconfig/aconfig/tests/storage_test_4.aconfig
similarity index 100%
rename from tools/aconfig/tests/storage_test_4.aconfig
rename to tools/aconfig/aconfig/tests/storage_test_4.aconfig
diff --git a/tools/aconfig/tests/test.aconfig b/tools/aconfig/aconfig/tests/test.aconfig
similarity index 100%
rename from tools/aconfig/tests/test.aconfig
rename to tools/aconfig/aconfig/tests/test.aconfig
diff --git a/tools/aconfig/tests/test_exported.aconfig b/tools/aconfig/aconfig/tests/test_exported.aconfig
similarity index 100%
rename from tools/aconfig/tests/test_exported.aconfig
rename to tools/aconfig/aconfig/tests/test_exported.aconfig
diff --git a/tools/aconfig/tests/test_force_read_only.aconfig b/tools/aconfig/aconfig/tests/test_force_read_only.aconfig
similarity index 100%
rename from tools/aconfig/tests/test_force_read_only.aconfig
rename to tools/aconfig/aconfig/tests/test_force_read_only.aconfig
diff --git a/tools/aconfig/aconfig_protos/Android.bp b/tools/aconfig/aconfig_protos/Android.bp
new file mode 100644
index 0000000..1cc4e41
--- /dev/null
+++ b/tools/aconfig/aconfig_protos/Android.bp
@@ -0,0 +1,62 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// proto libraries for consumers of `aconfig dump --format=protobuf` output
+
+java_library {
+    name: "libaconfig_java_proto_lite",
+    host_supported: true,
+    srcs: ["protos/aconfig.proto"],
+    static_libs: ["libprotobuf-java-lite"],
+    proto: {
+        type: "lite",
+    },
+    sdk_version: "current",
+    min_sdk_version: "UpsideDownCake",
+    apex_available: [
+        "com.android.configinfrastructure",
+        "//apex_available:platform",
+    ]
+}
+
+java_library_host {
+    name: "libaconfig_java_proto_full",
+    srcs: ["protos/aconfig.proto"],
+    static_libs: ["libprotobuf-java-full"],
+    proto: {
+        type: "full",
+    },
+}
+
+python_library_host {
+    name: "libaconfig_python_proto",
+    srcs: ["protos/aconfig.proto"],
+    proto: {
+        canonical_path_from_root: false,
+    },
+}
+
+rust_protobuf {
+    name: "libaconfig_rust_proto",
+    protos: ["protos/aconfig.proto"],
+    crate_name: "aconfig_rust_proto",
+    source_stem: "aconfig_rust_proto",
+    host_supported: true,
+}
+
+rust_library {
+    name: "libaconfig_protos",
+    srcs: ["src/lib.rs"],
+    crate_name: "aconfig_protos",
+    host_supported: true,
+    lints: "none",
+    rustlibs: [
+        "libaconfig_rust_proto",
+        "libanyhow",
+        "libprotobuf",
+    ],
+    proc_macros: [
+        "libpaste",
+    ]
+}
diff --git a/tools/aconfig/aconfig_protos/Cargo.toml b/tools/aconfig/aconfig_protos/Cargo.toml
new file mode 100644
index 0000000..114cf80
--- /dev/null
+++ b/tools/aconfig/aconfig_protos/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "aconfig_protos"
+version = "0.1.0"
+edition = "2021"
+build = "build.rs"
+
+[features]
+default = ["cargo"]
+cargo = []
+
+[dependencies]
+anyhow = "1.0.69"
+paste = "1.0.11"
+protobuf = "3.2.0"
+
+[build-dependencies]
+protobuf-codegen = "3.2.0"
diff --git a/tools/aconfig/build.rs b/tools/aconfig/aconfig_protos/build.rs
similarity index 100%
rename from tools/aconfig/build.rs
rename to tools/aconfig/aconfig_protos/build.rs
diff --git a/tools/aconfig/protos/aconfig.proto b/tools/aconfig/aconfig_protos/protos/aconfig.proto
similarity index 100%
rename from tools/aconfig/protos/aconfig.proto
rename to tools/aconfig/aconfig_protos/protos/aconfig.proto
diff --git a/tools/aconfig/src/protos.rs b/tools/aconfig/aconfig_protos/src/lib.rs
similarity index 91%
rename from tools/aconfig/src/protos.rs
rename to tools/aconfig/aconfig_protos/src/lib.rs
index 2684d20..f0d27d6 100644
--- a/tools/aconfig/src/protos.rs
+++ b/tools/aconfig/aconfig_protos/src/lib.rs
@@ -29,17 +29,17 @@
 // ---- When building with the Android tool-chain ----
 #[cfg(not(feature = "cargo"))]
 mod auto_generated {
-    pub use aconfig_protos::aconfig::flag_metadata::Flag_purpose as ProtoFlagPurpose;
-    pub use aconfig_protos::aconfig::Flag_declaration as ProtoFlagDeclaration;
-    pub use aconfig_protos::aconfig::Flag_declarations as ProtoFlagDeclarations;
-    pub use aconfig_protos::aconfig::Flag_metadata as ProtoFlagMetadata;
-    pub use aconfig_protos::aconfig::Flag_permission as ProtoFlagPermission;
-    pub use aconfig_protos::aconfig::Flag_state as ProtoFlagState;
-    pub use aconfig_protos::aconfig::Flag_value as ProtoFlagValue;
-    pub use aconfig_protos::aconfig::Flag_values as ProtoFlagValues;
-    pub use aconfig_protos::aconfig::Parsed_flag as ProtoParsedFlag;
-    pub use aconfig_protos::aconfig::Parsed_flags as ProtoParsedFlags;
-    pub use aconfig_protos::aconfig::Tracepoint as ProtoTracepoint;
+    pub use aconfig_rust_proto::aconfig::flag_metadata::Flag_purpose as ProtoFlagPurpose;
+    pub use aconfig_rust_proto::aconfig::Flag_declaration as ProtoFlagDeclaration;
+    pub use aconfig_rust_proto::aconfig::Flag_declarations as ProtoFlagDeclarations;
+    pub use aconfig_rust_proto::aconfig::Flag_metadata as ProtoFlagMetadata;
+    pub use aconfig_rust_proto::aconfig::Flag_permission as ProtoFlagPermission;
+    pub use aconfig_rust_proto::aconfig::Flag_state as ProtoFlagState;
+    pub use aconfig_rust_proto::aconfig::Flag_value as ProtoFlagValue;
+    pub use aconfig_rust_proto::aconfig::Flag_values as ProtoFlagValues;
+    pub use aconfig_rust_proto::aconfig::Parsed_flag as ProtoParsedFlag;
+    pub use aconfig_rust_proto::aconfig::Parsed_flags as ProtoParsedFlags;
+    pub use aconfig_rust_proto::aconfig::Tracepoint as ProtoTracepoint;
 }
 
 // ---- When building with cargo ----
@@ -68,6 +68,32 @@
 use anyhow::Result;
 use paste::paste;
 
+pub fn is_valid_name_ident(s: &str) -> bool {
+    // Identifiers must match [a-z][a-z0-9_]*, except consecutive underscores are not allowed
+    if s.contains("__") {
+        return false;
+    }
+    let mut chars = s.chars();
+    let Some(first) = chars.next() else {
+        return false;
+    };
+    if !first.is_ascii_lowercase() {
+        return false;
+    }
+    chars.all(|ch| ch.is_ascii_lowercase() || ch.is_ascii_digit() || ch == '_')
+}
+
+pub fn is_valid_package_ident(s: &str) -> bool {
+    if !s.contains('.') {
+        return false;
+    }
+    s.split('.').all(is_valid_name_ident)
+}
+
+pub fn is_valid_container_ident(s: &str) -> bool {
+    s.split('.').all(is_valid_name_ident)
+}
+
 fn try_from_text_proto<T>(s: &str) -> Result<T>
 where
     T: protobuf::MessageFull,
@@ -87,14 +113,13 @@
 
 pub mod flag_declaration {
     use super::*;
-    use crate::codegen;
     use anyhow::ensure;
 
     pub fn verify_fields(pdf: &ProtoFlagDeclaration) -> Result<()> {
         ensure_required_fields!("flag declaration", pdf, "name", "namespace", "description");
 
-        ensure!(codegen::is_valid_name_ident(pdf.name()), "bad flag declaration: bad name");
-        ensure!(codegen::is_valid_name_ident(pdf.namespace()), "bad flag declaration: bad name");
+        ensure!(is_valid_name_ident(pdf.name()), "bad flag declaration: bad name");
+        ensure!(is_valid_name_ident(pdf.namespace()), "bad flag declaration: bad name");
         ensure!(!pdf.description().is_empty(), "bad flag declaration: empty description");
         ensure!(pdf.bug.len() == 1, "bad flag declaration: exactly one bug required");
 
@@ -104,7 +129,6 @@
 
 pub mod flag_declarations {
     use super::*;
-    use crate::codegen;
     use anyhow::ensure;
 
     pub fn try_from_text_proto(s: &str) -> Result<ProtoFlagDeclarations> {
@@ -118,11 +142,11 @@
         // TODO(b/312769710): Make the container field required.
 
         ensure!(
-            codegen::is_valid_package_ident(pdf.package()),
+            is_valid_package_ident(pdf.package()),
             "bad flag declarations: bad package"
         );
         ensure!(
-            !pdf.has_container() || codegen::is_valid_container_ident(pdf.container()),
+            !pdf.has_container() || is_valid_container_ident(pdf.container()),
             "bad flag declarations: bad container"
         );
         for flag_declaration in pdf.flag.iter() {
@@ -135,14 +159,13 @@
 
 pub mod flag_value {
     use super::*;
-    use crate::codegen;
     use anyhow::ensure;
 
     pub fn verify_fields(fv: &ProtoFlagValue) -> Result<()> {
         ensure_required_fields!("flag value", fv, "package", "name", "state", "permission");
 
-        ensure!(codegen::is_valid_package_ident(fv.package()), "bad flag value: bad package");
-        ensure!(codegen::is_valid_name_ident(fv.name()), "bad flag value: bad name");
+        ensure!(is_valid_package_ident(fv.package()), "bad flag value: bad package");
+        ensure!(is_valid_name_ident(fv.name()), "bad flag value: bad name");
 
         Ok(())
     }
@@ -200,7 +223,6 @@
 
 pub mod parsed_flag {
     use super::*;
-    use crate::codegen;
     use anyhow::ensure;
 
     pub fn verify_fields(pf: &ProtoParsedFlag) -> Result<()> {
@@ -215,13 +237,13 @@
             "permission"
         );
 
-        ensure!(codegen::is_valid_package_ident(pf.package()), "bad parsed flag: bad package");
+        ensure!(is_valid_package_ident(pf.package()), "bad parsed flag: bad package");
         ensure!(
-            !pf.has_container() || codegen::is_valid_container_ident(pf.container()),
+            !pf.has_container() || is_valid_container_ident(pf.container()),
             "bad parsed flag: bad container"
         );
-        ensure!(codegen::is_valid_name_ident(pf.name()), "bad parsed flag: bad name");
-        ensure!(codegen::is_valid_name_ident(pf.namespace()), "bad parsed flag: bad namespace");
+        ensure!(is_valid_name_ident(pf.name()), "bad parsed flag: bad name");
+        ensure!(is_valid_name_ident(pf.namespace()), "bad parsed flag: bad namespace");
         ensure!(!pf.description().is_empty(), "bad parsed flag: empty description");
         ensure!(!pf.trace.is_empty(), "bad parsed flag: empty trace");
         for tp in pf.trace.iter() {
@@ -261,7 +283,7 @@
     }
 
     pub fn verify_fields(pf: &ProtoParsedFlags) -> Result<()> {
-        use crate::protos::parsed_flag::path_to_declaration;
+        use crate::parsed_flag::path_to_declaration;
 
         let mut previous: Option<&ProtoParsedFlag> = None;
         for parsed_flag in pf.parsed_flag.iter() {
@@ -848,7 +870,7 @@
         let parsed_flags = try_from_binary_proto_from_text_proto(text_proto).unwrap();
         let parsed_flag = &parsed_flags.parsed_flag[0];
         assert_eq!(
-            crate::protos::parsed_flag::path_to_declaration(parsed_flag),
+            crate::parsed_flag::path_to_declaration(parsed_flag),
             "flags.declarations"
         );
     }
diff --git a/tools/aconfig/printflags/Cargo.toml b/tools/aconfig/printflags/Cargo.toml
new file mode 100644
index 0000000..7313f5d
--- /dev/null
+++ b/tools/aconfig/printflags/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "printflags"
+version = "0.1.0"
+edition = "2021"
+
+[features]
+default = ["cargo"]
+cargo = []
+
+[dependencies]
+anyhow = "1.0.69"
+paste = "1.0.11"
+protobuf = "3.2.0"
+regex = "1.10.3"
+aconfig_protos = { path = "../aconfig_protos" }
diff --git a/tools/aconfig/printflags/src/main.rs b/tools/aconfig/printflags/src/main.rs
index ae9b83a..7fcde61 100644
--- a/tools/aconfig/printflags/src/main.rs
+++ b/tools/aconfig/printflags/src/main.rs
@@ -16,8 +16,8 @@
 
 //! `printflags` is a device binary to print feature flags.
 
-use aconfig_protos::aconfig::Flag_state as State;
-use aconfig_protos::aconfig::Parsed_flags as ProtoParsedFlags;
+use aconfig_protos::ProtoFlagState as State;
+use aconfig_protos::ProtoParsedFlags as ProtoParsedFlags;
 use anyhow::{bail, Context, Result};
 use regex::Regex;
 use std::collections::BTreeMap;