diff --git a/packer/.gitignore b/packer/.gitignore
new file mode 100644
index 000000000..ea8c4bf7f
--- /dev/null
+++ b/packer/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/packer/Cargo.lock b/packer/Cargo.lock
new file mode 100644
index 000000000..de164378b
--- /dev/null
+++ b/packer/Cargo.lock
@@ -0,0 +1,379 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
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+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi",
+]
+
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+ "constant_time_eq",
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+ "redox_syscall",
+ "winapi",
+]
+
+[[package]]
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+dependencies = [
+ "clap",
+ "serde",
+ "serde_yaml",
+ "shellexpand",
+ "tar",
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+ "rust-argon2",
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+ "quote",
+ "unicode-xid",
+]
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+ "libc",
+ "redox_syscall",
+ "xattr",
+]
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+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
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+[[package]]
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+
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+checksum = "244c3741f4240ef46274860397c7c74e50eb23624996930e484c16679633a54c"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "yaml-rust"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65923dd1784f44da1d2c3dbbc5e822045628c590ba72123e1c73d3c230c4434d"
+dependencies = [
+ "linked-hash-map",
+]
diff --git a/packer/Cargo.toml b/packer/Cargo.toml
new file mode 100644
index 000000000..51480dfe8
--- /dev/null
+++ b/packer/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "flipper-packer"
+version = "0.1.0"
+authors = ["Facebook, Inc."]
+edition = "2018"
+
+[dependencies]
+clap = "2.33.0"
+shellexpand = "2.0.0"
+tar = "0.4.26"
+serde = { version = "1.0.106", features = ["derive"] }
+serde_yaml = "0.8.11"
diff --git a/packer/README.md b/packer/README.md
new file mode 100644
index 000000000..9e133939e
--- /dev/null
+++ b/packer/README.md
@@ -0,0 +1,64 @@
+# Flipper Packer
+
+*Work in progress and incomplete*
+
+A tool for splitting a Flipper build into smaller artifacts that can be distributed and cached separately.
+
+**N.B. Buck build files are not included in the open-source export of this tool.**
+
+## Building
+
+With cargo:
+```
+$ cargo build
+```
+
+With Buck:
+```
+$ buck build :packer
+```
+
+## Testing
+
+With cargo:
+```
+$ cargo test
+```
+
+With Buck:
+```
+$ buck test :packer
+```
+
+## Usage
+
+See help page:
+
+```
+$ cargo run -- --help
+flipper-packer 0.1.0
+Facebook, Inc.
+
+
+USAGE:
+    flipper-packer [FLAGS] [OPTIONS] <PLATFORM>
+
+FLAGS:
+    -h, --help        Prints help information
+    -p, --packlist    Custom list of files to pack.
+    -V, --version     Prints version information
+
+OPTIONS:
+    -d, --dist <DIRECTORY>      Flipper dist directory to read from. [default: ~/fbsource/xplat/sonar/dist]
+    -o, --output <DIRECTORY>    Directory to write output files to. [default: .]
+
+ARGS:
+    <PLATFORM>    Platform to build for [possible values: Mac, Linux, Windows]
+
+```
+
+Buck:
+
+```
+$ buck run :packer
+```
diff --git a/packer/src/error.rs b/packer/src/error.rs
new file mode 100644
index 000000000..7e3f0e53f
--- /dev/null
+++ b/packer/src/error.rs
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+use crate::types::{PackType, Platform};
+use std::fmt;
+use std::io;
+use std::path::PathBuf;
+
+#[derive(Debug)]
+pub enum Error {
+    IOError(io::Error),
+    MissingPackFile(Platform, PackType, PathBuf),
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Error::IOError(e)
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use Error::*;
+
+        match self {
+            IOError(e) => write!(f, "IO Error: {}", e),
+            Error::MissingPackFile(platform, pack_type, path) => write!(
+                f,
+                "Couldn't open file to pack for platform {:?} and type {:?}: {}",
+                platform,
+                pack_type,
+                path.to_string_lossy()
+            ),
+        }
+    }
+}
diff --git a/packer/src/main.rs b/packer/src/main.rs
new file mode 100644
index 000000000..be14ec588
--- /dev/null
+++ b/packer/src/main.rs
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+mod error;
+mod types;
+
+use clap::value_t_or_exit;
+use std::collections::BTreeMap;
+use std::fs::File;
+use std::path;
+use types::{PackType, Platform};
+
+const DEFAULT_PACKLIST: &str = include_str!("packlist.yaml");
+
+type PackListPlatform = BTreeMap<PackType, Vec<path::PathBuf>>;
+
+#[derive(Debug, serde::Deserialize)]
+struct PackList(pub BTreeMap<Platform, PackListPlatform>);
+
+fn pack(
+    platform: &Platform,
+    dist_dir: &std::path::PathBuf,
+    pack_list: &PackList,
+    output_directory: &std::path::PathBuf,
+) -> Result<(), error::Error> {
+    let mut frameworks_path = output_directory.clone();
+    frameworks_path.push("frameworks.tar");
+    let mut frameworks_tar = tar::Builder::new(File::create(frameworks_path)?);
+    // MacOS uses symlinks for bundling multiple framework versions and pointing
+    // to the "Current" one.
+    frameworks_tar.follow_symlinks(false);
+    pack_platform(
+        platform,
+        dist_dir,
+        pack_list,
+        &PackType::Frameworks,
+        &mut frameworks_tar,
+    )?;
+    frameworks_tar.finish()?;
+
+    // TODO: Instead of hard-coding the two types, just iterate over the packlist.
+    let mut core_path = output_directory.clone();
+    core_path.push("core.tar");
+    let mut core_tar = tar::Builder::new(File::create(core_path)?);
+    pack_platform(
+        platform,
+        dist_dir,
+        pack_list,
+        &PackType::Core,
+        &mut core_tar,
+    )?;
+
+    eprintln!("Written.");
+    Ok(())
+}
+
+fn pack_platform(
+    platform: &Platform,
+    dist_dir: &std::path::PathBuf,
+    pack_list: &PackList,
+    pack_type: &PackType,
+    tar_builder: &mut tar::Builder<File>,
+) -> Result<(), error::Error> {
+    let pack_files = pack_list
+        .0
+        .get(platform)
+        .and_then(|f| f.get(pack_type))
+        .expect(&format!(
+            "Missing packlist definition for platform {:?} and pack type {:?}.",
+            platform, pack_type
+        ));
+    let base_dir = match platform {
+        Platform::Mac => path::Path::new(dist_dir).join("mac"),
+        // TODO: Verify this.
+        Platform::Linux => path::Path::new(dist_dir).join("linux-unpacked"),
+        Platform::Windows => path::Path::new(dist_dir).join("win-unpacked"),
+    };
+
+    for f in pack_files {
+        let full_path = path::Path::new(&base_dir).join(f);
+        if !full_path.exists() {
+            return Err(error::Error::MissingPackFile(
+                platform.clone(),
+                pack_type.clone(),
+                full_path,
+            ));
+        }
+        if full_path.is_file() {
+            tar_builder.append_path_with_name(full_path, f)?;
+        } else if full_path.is_dir() {
+            tar_builder.append_dir_all(f, full_path)?;
+        }
+    }
+
+    Ok(())
+}
+
+fn main() -> Result<(), error::Error> {
+    // Ensure to define all env vars used here in the BUCK env, too.
+    let args = clap::App::new(env!("CARGO_PKG_NAME"))
+        .version(env!("CARGO_PKG_VERSION"))
+        .author(env!("CARGO_PKG_AUTHORS"))
+        .about("Split the Flipper distribution into smaller, cacheable artifacts")
+        .arg(
+            clap::Arg::from_usage("-o, --output [DIRECTORY] 'Directory to write output files to.'")
+                .default_value("."),
+        )
+        .arg(
+            clap::Arg::from_usage("-d, --dist [DIRECTORY] 'Flipper dist directory to read from.'")
+                .default_value("~/fbsource/xplat/sonar/dist"),
+        )
+        .arg(clap::Arg::from_usage(
+            "-p, --packlist=packlist.yaml 'Custom list of files to pack.'",
+        ))
+        .arg(
+            clap::Arg::from_usage("[PLATFORM] 'Platform to build for'")
+                .case_insensitive(true)
+                .required(true)
+                .possible_values(&Platform::variants()),
+        )
+        .get_matches();
+
+    let platform = value_t_or_exit!(args.value_of("PLATFORM"), Platform);
+    let dist_dir = path::PathBuf::from(
+        shellexpand::tilde(args.value_of("dist").expect("argument has default")).to_string(),
+    );
+    let pack_list_str = args
+        .value_of("packlist")
+        .map(|f| std::fs::read_to_string(f).expect(&format!("Failed to open packfile {}.", f)))
+        .unwrap_or(DEFAULT_PACKLIST.to_string());
+    let pack_list: PackList =
+        serde_yaml::from_str(&pack_list_str).expect("Failed to deserialize YAML packlist.");
+    pack(
+        &platform,
+        &dist_dir,
+        &pack_list,
+        &path::PathBuf::from(args.value_of("output").expect("argument has default")),
+    )
+    .unwrap();
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_included_packlist_parses() {
+        let res: PackList =
+            serde_yaml::from_str(DEFAULT_PACKLIST).expect("Default packlist doesn't deserialize");
+        assert_eq!(res.0.len(), 3);
+    }
+}
diff --git a/packer/src/packlist.yaml b/packer/src/packlist.yaml
new file mode 100644
index 000000000..26df7a40d
--- /dev/null
+++ b/packer/src/packlist.yaml
@@ -0,0 +1,16 @@
+mac:
+  frameworks:
+    - Flipper.app/Contents/Frameworks/
+    - Flipper.app/Contents/Info.plist
+    - Flipper.app/Contents/MacOS
+    - Flipper.app/Contents/PkgInfo
+  core:
+    - Flipper.app/Contents/Resources
+    
+linux:
+  frameworks: []
+  core: []
+    
+windows:
+  frameworks: []
+  core: []
\ No newline at end of file
diff --git a/packer/src/types.rs b/packer/src/types.rs
new file mode 100644
index 000000000..386c7a226
--- /dev/null
+++ b/packer/src/types.rs
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+use clap::arg_enum;
+
+arg_enum! {
+    #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, serde::Deserialize)]
+    #[serde(rename_all = "lowercase")]
+    pub enum Platform {
+        Mac,
+        Linux,
+        Windows
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, serde::Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum PackType {
+    Frameworks,
+    Core,
+}