diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..9a3c9fec
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,566 @@
+# Changelog
+
+All notable changes to the `ttrpc` crate are documented in this file.
+
+The format is based on [Keep a Changelog], and this project follows
+[Semantic Versioning]. Historical entries were reconstructed from the
+published crates and Git history. Release dates are crates.io publication
+dates. Because several release lines were maintained in parallel, releases
+are ordered by publication date rather than version number.
+
+## [0.9.0] - 2025-07-15
+
+### API changes
+
+- **Breaking:** `asynchronous::Client::connect` is now asynchronous and must
+  be awaited.
+- **Breaking:** Async clients and servers now use the public
+  `transport::Socket` and `transport::Listener` abstractions. Raw descriptor
+  constructors are transport-specific and explicitly `unsafe`.
+- **Breaking:** Direct users of `ClientStreamReceiver::new` must pass a
+  cloned `Client` to keep the underlying connection alive.
+- **Added:** Async transport constructors now cover Unix sockets, TCP,
+  vsock, and Windows named pipes.
+- **Migration:** Regenerate service bindings with a compatible compiler and
+  code generator after upgrading the Protocol Buffers dependencies.
+
+### Added
+
+- Added TCP transport support and TCP client and server examples.
+- Added async Windows named-pipe support.
+- Converted the repository into a Cargo workspace.
+
+### Changed
+
+- Updated the Protocol Buffers dependencies and related generated code.
+
+### Fixed
+
+- Fixed async server and streaming client lifetime handling.
+- Fixed client creation when the process reaches its file descriptor limit.
+- Fixed a synchronous server connection file descriptor leak.
+
+## [0.8.6] - 2025-06-24
+
+### Fixed
+
+- Fixed a synchronous server connection file descriptor leak.
+
+## [0.5.10] - 2025-06-24
+
+### Fixed
+
+- Backported the synchronous server connection file descriptor leak fix.
+
+## [0.8.5] - 2025-05-09
+
+### Fixed
+
+- Fixed async server shutdown when the server object is dropped.
+- Fixed a panic when creating a client after reaching the file descriptor
+  limit.
+- Kept streaming client connections alive until all stream handles are
+  released.
+
+### Changed
+
+- Added end-to-end coverage for all examples.
+
+## [0.8.4] - 2025-01-22
+
+### Fixed
+
+- Avoided applying unsupported socket options to Unix and vsock sockets.
+
+## [0.8.3] - 2025-01-17
+
+### Added
+
+- Added vsock CID parsing and generated `mod.rs` support.
+- Added a server-streaming example.
+
+### Changed
+
+- Improved request context ergonomics and async request failure handling.
+
+### Fixed
+
+- Fixed the synchronous server accept loop after errors.
+- Avoided panics caused by poisoned internal locks.
+- Fixed build failures and removed unused code.
+
+## [0.5.9] - 2025-01-14
+
+### Fixed
+
+- Backported the fix for infinite synchronous server accept loops.
+
+## [0.8.2] - 2024-09-27
+
+### Added
+
+- Added delivery acknowledgements for streamed messages.
+- Declared the minimum supported Rust version.
+
+### Fixed
+
+- Sent pending responses before shutdown and fixed streaming timing races.
+- Fixed hangs while waiting for connections to exit.
+- Ensured connection file descriptors are released during shutdown.
+- Retried interrupted operating-system calls and kept accepting after
+  recoverable errors.
+
+## [0.5.8] - 2024-09-25
+
+### Fixed
+
+- Backported the fix that keeps the server running after an accept error.
+
+## [0.7.2] - 2024-09-25
+
+### Added
+
+- Added Windows synchronous client and server support and Android support.
+- Declared the minimum supported Rust version.
+
+### Changed
+
+- Updated socket handling to the newer `nix` APIs.
+
+### Fixed
+
+- Kept the server running after recoverable accept errors.
+- Fixed Windows connection cleanup and server shutdown behavior.
+
+## [0.5.7] - 2023-10-24
+
+### Fixed
+
+- Ignored harmless errors while closing synchronous server descriptors.
+
+## [0.8.1] - 2023-08-29
+
+### Added
+
+- Exposed the stream handle types used by generated streaming APIs.
+- Added request cancellation state to synchronous server contexts.
+
+### Fixed
+
+- Enforced frame size limits in synchronous and asynchronous transports.
+- Fixed missing default data in streams.
+- Closed listener descriptors during async server shutdown.
+
+## [0.5.6] - 2023-07-19
+
+### Changed
+
+- Reverted a source-level Clippy adjustment for compatibility.
+
+## [0.5.5] - 2023-07-19
+
+### Fixed
+
+- Rejected oversized packets in synchronous and asynchronous transports.
+- Refactored response delivery to apply frame validation consistently.
+
+## [0.8.0] - 2023-06-19
+
+### API changes
+
+- **Breaking:** `sync::Client::new` now returns `Result<Client>` so connection
+  failures can be handled by callers.
+- **Breaking:** Low-level synchronous transport APIs use `PipeConnection`
+  instead of accepting raw file descriptors directly.
+- **Added:** Cross-platform `PipeConnection` and `PipeListener` abstractions
+  support Unix sockets and Windows named pipes.
+
+### Added
+
+- Added synchronous Windows named-pipe support and Android support.
+- Added APIs for constructing clients from existing connections.
+- Added integration tests for the synchronous examples.
+
+### Changed
+
+- Updated socket handling for the newer `nix` APIs.
+- Changed client construction to report connection errors with `Result`.
+
+### Fixed
+
+- Fixed connection cleanup on Windows.
+- Fixed a server thread that could remain blocked during shutdown.
+
+## [0.5.4] - 2023-06-19
+
+### Changed
+
+- Allowed asynchronous requests to be sent through a shared `&Client`.
+- Updated the Protocol Buffers 2.x dependency line.
+
+## [0.7.1] - 2022-09-14
+
+### Changed
+
+- Updated Protocol Buffers support from version 2 to version 3.
+- Updated generated examples and Rust 1.63 compatibility.
+
+## [0.7.0] - 2022-08-12
+
+> This release was yanked from crates.io.
+
+### API changes
+
+- **Added:** Generated services can use client-streaming, server-streaming,
+  and bidirectional RPC methods.
+- **Added:** Public stream handles, stream handlers, codecs, and cooperative
+  shutdown primitives support the new generated interfaces.
+- **Migration:** Regenerate service bindings to use streaming RPCs; existing
+  unary services can continue to use the unary interfaces.
+
+### Added
+
+- Added client-streaming, server-streaming, and bidirectional RPC support.
+- Added cooperative async server shutdown and streaming examples.
+
+### Changed
+
+- Reworked async connection handling, framing, and message codecs.
+- Removed the unused `bytes` dependency.
+
+## [0.6.1] - 2022-05-11
+
+### Added
+
+- Added timeout support to the asynchronous client.
+
+### Fixed
+
+- Improved frame header validation and async socket error handling.
+
+## [0.5.3] - 2022-05-11
+
+### Added
+
+- Backported asynchronous client timeout support.
+
+### Fixed
+
+- Corrected the descriptor stored in asynchronous server contexts.
+
+## [0.6.0] - 2022-01-18
+
+### API changes
+
+- **Breaking:** The protocol module moved from `ttrpc::ttrpc` to
+  `ttrpc::proto`.
+- **Breaking:** Internal runtime helper modules are no longer public; use the
+  documented top-level and runtime-specific re-exports.
+- **Changed:** Async requests can now be sent through a shared `&Client`
+  instead of requiring `&mut Client`.
+
+### Added
+
+- Added normal filesystem Unix sockets on Linux.
+- Allowed asynchronous requests to be sent through a shared `&Client`.
+
+### Changed
+
+- Hid runtime implementation details that did not need to be public.
+- Simplified Unix socket address parsing and removed `Domain::AbstractUnix`.
+- Stored the connected stream descriptor in async server contexts.
+
+## [0.5.2] - 2021-11-22
+
+### Added
+
+- Added macOS support and filesystem Unix socket connections.
+- Added request timeouts to server-side `TtrpcContext`.
+- Added raw client connection helpers.
+
+### Changed
+
+- Removed redundant Unix socket path suffix handling.
+- Updated socket creation and audited dependencies.
+
+### Fixed
+
+- Fixed synchronous server descriptor cleanup.
+
+## [0.4.16] - 2021-11-18
+
+### Fixed
+
+- Closed connection descriptors from the synchronous server reaper thread.
+- Corrected inline rustdoc rendering.
+
+## [0.5.1] - 2021-04-25
+
+### Added
+
+- Added async server timeout enforcement.
+- Made request contexts cloneable.
+
+### Changed
+
+- Improved async handler error propagation and cancellation when clients
+  disconnect.
+
+## [0.4.15] - 2021-04-20
+
+### Fixed
+
+- Cancelled async server handlers after their clients disconnect.
+
+## [0.5.0] - 2021-02-24
+
+### API changes
+
+- **Breaking:** Generated client and server method signatures now carry a
+  `Context` containing request metadata and timeout information.
+- **Migration:** Regenerate service bindings and pass a `Context` when making
+  client calls or implementing service methods.
+
+### Added
+
+- Added request metadata to generated client and server APIs.
+- Added `Context` as the common carrier for metadata and timeouts.
+
+### Changed
+
+- Updated the async runtime to Tokio 1.0.
+
+## [0.4.14] - 2020-12-25
+
+### Fixed
+
+- Fixed a synchronous server method-handler thread leak.
+
+## [0.4.13] - 2020-12-23
+
+### Fixed
+
+- Fixed failures to wake synchronous client handlers.
+
+## [0.4.12] - 2020-11-25
+
+### Changed
+
+- Reduced noisy log levels for frequent, non-actionable events.
+
+## [0.4.11] - 2020-11-23
+
+### Fixed
+
+- Fixed a client file descriptor leak.
+- Logged failures while closing the client receiver descriptor.
+
+## [0.4.10] - 2020-11-20
+
+### Changed
+
+- Replaced `select` with `poll` in the synchronous transport loop.
+
+## [0.4.9] - 2020-10-22
+
+### Changed
+
+- Accepted any `ToString` status message in status helper APIs.
+- Renamed internal macros to follow Rust naming conventions.
+
+## [0.4.8] - 2020-10-09
+
+### Added
+
+- Added async raw file descriptor conversions.
+- Added graceful async shutdown and server restart support.
+
+### Changed
+
+- Refined server restart lifecycle APIs.
+
+## [0.4.7] - 2020-09-21
+
+### Added
+
+- Added synchronous server restart support.
+
+### Changed
+
+- Reported message read failures as socket errors.
+
+## [0.4.6] - 2020-09-04
+
+### Changed
+
+- Removed excessive informational logging.
+
+## [0.4.5] - 2020-08-31
+
+### Fixed
+
+- Fixed a client panic when a request times out.
+
+## [0.4.4] - 2020-08-24
+
+### Fixed
+
+- Set close-on-exec on async server sockets.
+
+## [0.4.3] - 2020-08-18
+
+### Added
+
+- Added request timeout support to synchronous and async clients.
+- Added raw file descriptor conversions.
+- Implemented `std::error::Error` for the crate error type.
+
+### Fixed
+
+- Fixed client hangs after empty responses and socket failures.
+
+## [0.4.2] - 2020-07-20
+
+### Fixed
+
+- Fixed docs.rs generation.
+
+## [0.4.1] - 2020-07-20
+
+### Changed
+
+- Made async dependencies optional and improved feature separation.
+- Added crate-level API documentation.
+- Updated examples for the renamed code generator.
+
+## [0.4.0] - 2020-07-10
+
+### API changes
+
+- **Added:** Asynchronous client and server APIs are available through the
+  async feature and runtime-specific modules.
+- **Changed:** Synchronous and asynchronous APIs, examples, and generated
+  output are separated more clearly.
+- **Migration:** Enable the async feature and regenerate protocol bindings
+  before adopting the asynchronous interfaces.
+
+### Added
+
+- Added asynchronous clients and servers.
+- Added async vsock support.
+- Added `Debug` support for server request contexts.
+
+### Changed
+
+- Separated synchronous and asynchronous examples and features.
+- Moved generated protocol code to Cargo's `OUT_DIR`.
+
+### Fixed
+
+- Reaped completed synchronous connection threads promptly.
+
+## [0.3.0] - 2020-04-22
+
+### API changes
+
+- **Breaking:** `Server::start` now borrows `&mut self` instead of consuming
+  the server.
+- **Added:** Servers can add custom listeners, shut down explicitly, and be
+  managed after startup.
+- **Added:** Protocol bindings can be generated programmatically from Rust.
+
+### Added
+
+- Added pure-Rust programmatic Protocol Buffers code generation.
+- Added server shutdown and custom listener APIs.
+- Added close-on-exec socket creation.
+
+### Fixed
+
+- Fixed partial frame reads and writes and peer-close detection.
+- Fixed potential server deadlocks and connection leaks.
+- Fixed server panics after clients disconnect.
+
+## [0.2.1] - 2020-02-20
+
+### Changed
+
+- Updated crate metadata and introductory documentation.
+
+## [0.2.0] - 2020-01-15
+
+### API changes
+
+- **Breaking:** Generated types, fields, and status helpers were renamed to
+  follow idiomatic Rust naming conventions.
+- **Migration:** Regenerate bindings and update call sites to the new
+  snake-case methods and fields.
+
+### Added
+
+- Added vsock server support.
+- Generated example protocol code from `build.rs`.
+
+### Changed
+
+- Updated the `nix` dependency and removed compiler warnings.
+
+## [0.1.0] - 2019-09-23
+
+### API changes
+
+- Initial public API for synchronous ttrpc clients, servers, and generated
+  services.
+
+### Added
+
+- Initial synchronous ttrpc client and server implementation.
+- Added Protocol Buffers service generation and client/server examples.
+
+[Keep a Changelog]: https://keepachangelog.com/en/2.0.0/
+[Semantic Versioning]: https://semver.org/spec/v2.0.0.html
+[0.9.0]: https://github.com/containerd/ttrpc-rust/compare/cfe37a2c...f31f5925
+[0.8.6]: https://github.com/containerd/ttrpc-rust/compare/af812a6f...44d34d5c
+[0.5.10]: https://github.com/containerd/ttrpc-rust/compare/9a79290f...5784dc00
+[0.8.5]: https://github.com/containerd/ttrpc-rust/compare/cfe37a2c...af812a6f
+[0.8.4]: https://github.com/containerd/ttrpc-rust/compare/0610015a...cfe37a2c
+[0.8.3]: https://github.com/containerd/ttrpc-rust/compare/b9e9dd8a...0610015a
+[0.5.9]: https://github.com/containerd/ttrpc-rust/compare/674ada47...9a79290f
+[0.8.2]: https://github.com/containerd/ttrpc-rust/compare/f669c050...b9e9dd8a
+[0.5.8]: https://github.com/containerd/ttrpc-rust/compare/1c185cbb...674ada47
+[0.7.2]: https://github.com/containerd/ttrpc-rust/compare/5d1d5dcd...593f1312
+[0.5.7]: https://github.com/containerd/ttrpc-rust/compare/29560c8a...1c185cbb
+[0.8.1]: https://github.com/containerd/ttrpc-rust/compare/b13d3fd5...f669c050
+[0.5.6]: https://github.com/containerd/ttrpc-rust/compare/9bef9c6a...29560c8a
+[0.5.5]: https://github.com/containerd/ttrpc-rust/compare/8968bfad...9bef9c6a
+[0.8.0]: https://github.com/containerd/ttrpc-rust/compare/5d1d5dcd...b13d3fd5
+[0.5.4]: https://github.com/containerd/ttrpc-rust/compare/66326830...8968bfad
+[0.7.1]: https://github.com/containerd/ttrpc-rust/compare/0145f972...5d1d5dcd
+[0.7.0]: https://github.com/containerd/ttrpc-rust/compare/499d5e5b...0145f972
+[0.6.1]: https://github.com/containerd/ttrpc-rust/compare/e5a5373c...499d5e5b
+[0.5.3]: https://github.com/containerd/ttrpc-rust/compare/4a6173d5...66326830
+[0.6.0]: https://github.com/containerd/ttrpc-rust/compare/4a6173d5...e5a5373c
+[0.5.2]: https://github.com/containerd/ttrpc-rust/compare/f8b10c67...4a6173d5
+[0.4.16]: https://github.com/containerd/ttrpc-rust/compare/e5fc2b4a...cc0d4056
+[0.5.1]: https://github.com/containerd/ttrpc-rust/compare/eef20041...f8b10c67
+[0.4.15]: https://github.com/containerd/ttrpc-rust/compare/a9c9032e...e5fc2b4a
+[0.5.0]: https://github.com/containerd/ttrpc-rust/compare/a9c9032e...eef20041
+[0.4.14]: https://github.com/containerd/ttrpc-rust/compare/ea5972a0...a9c9032e
+[0.4.13]: https://github.com/containerd/ttrpc-rust/compare/51853590...ea5972a0
+[0.4.12]: https://github.com/containerd/ttrpc-rust/compare/40d21d75...51853590
+[0.4.11]: https://github.com/containerd/ttrpc-rust/compare/6a242e34...40d21d75
+[0.4.10]: https://github.com/containerd/ttrpc-rust/compare/961ad613...6a242e34
+[0.4.9]: https://github.com/containerd/ttrpc-rust/compare/8f99147a...961ad613
+[0.4.8]: https://github.com/containerd/ttrpc-rust/compare/d8597956...8f99147a
+[0.4.7]: https://github.com/containerd/ttrpc-rust/compare/59381ad4...d8597956
+[0.4.6]: https://github.com/containerd/ttrpc-rust/compare/9470d136...59381ad4
+[0.4.5]: https://github.com/containerd/ttrpc-rust/compare/42e86180...9470d136
+[0.4.4]: https://github.com/containerd/ttrpc-rust/compare/dfd7d40d...42e86180
+[0.4.3]: https://github.com/containerd/ttrpc-rust/compare/98eb4363...dfd7d40d
+[0.4.2]: https://github.com/containerd/ttrpc-rust/compare/0997a9ca...98eb4363
+[0.4.1]: https://github.com/containerd/ttrpc-rust/compare/9a9248cd...0997a9ca
+[0.4.0]: https://github.com/containerd/ttrpc-rust/compare/b0194b38...9a9248cd
+[0.3.0]: https://github.com/containerd/ttrpc-rust/compare/90d85de6...b0194b38
+[0.2.1]: https://github.com/containerd/ttrpc-rust/compare/fce4b488...90d85de6
+[0.2.0]: https://github.com/containerd/ttrpc-rust/compare/76888ad7...fce4b488
+[0.1.0]: https://github.com/containerd/ttrpc-rust/commits/76888ad7
diff --git a/RELEASE.md b/RELEASE.md
index 092fbf2e..d752951e 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -6,12 +6,16 @@ This document describes the steps to release a new version of the crate or wasi-
 
 ### Release Steps
 
-1. Bump package and dependency versions in:
+1. Add a new dated release section to the relevant crate changelog:
+   * `./CHANGELOG.md` for `ttrpc`.
+   * `./compiler/CHANGELOG.md` for `ttrpc-compiler`.
+   * `./ttrpc-codegen/CHANGELOG.md` for `ttrpc-codegen`.
+2. Bump package and dependency versions in:
    * `./compiler/Cargo.toml`: Bump the package version as needed.
    * `./ttrpc-codegen/Cargo.toml`: Bump the package version as needed.
    * `./Cargo.toml`: Bump package version as needed. Then bump the workspace dependencies version to match the respective crates versions.
-2. Commit the changes and get them merged in the repo.
-2. Dry run the `cargo publish` command as follow
+3. Commit the changes and get them merged in the repo.
+4. Dry run the `cargo publish` command as follows:
    ```bash
    cargo +nightly publish \
      -Z package-workspace \
@@ -21,7 +25,8 @@ This document describes the steps to release a new version of the crate or wasi-
      -p ttrpc-codegen \
      -p ttrpc-compiler
    ```
-2. If the dry run succeeds, publish the crates that need publishing using `cargo publihs -p <crate>` in the following order
+5. If the dry run succeeds, publish the crates that need publishing using
+   `cargo publish -p <crate>` in the following order:
    1. `ttrpc-compiler`
    2. `ttrpc-codegen`
-   3. `ttrpc`
\ No newline at end of file
+   3. `ttrpc`
diff --git a/compiler/CHANGELOG.md b/compiler/CHANGELOG.md
new file mode 100644
index 00000000..2ab9812a
--- /dev/null
+++ b/compiler/CHANGELOG.md
@@ -0,0 +1,193 @@
+# Changelog
+
+All notable changes to the `ttrpc-compiler` crate are documented in this
+file.
+
+The format is based on [Keep a Changelog], and this project follows
+[Semantic Versioning]. Historical entries were reconstructed from the
+published crates and Git history. Release dates are crates.io publication
+dates. Releases are ordered by publication date because multiple version
+lines were maintained in parallel.
+
+## [0.8.0] - 2025-07-15
+
+### API changes
+
+- **Changed:** Generated bindings target the newer Protocol Buffers APIs;
+  regenerate checked-in bindings when upgrading.
+- The public `Customize` options remain compatible with the 0.7 release
+  line.
+
+### Changed
+
+- Updated generated code for the newer Protocol Buffers APIs.
+- Reorganized the generator into more focused internal modules.
+- Moved the repository to a Cargo workspace.
+
+### Fixed
+
+- Avoided unnecessary mutable bindings and unused-method warnings in
+  generated server registration code.
+
+## [0.7.0] - 2025-01-15
+
+### API changes
+
+- **Added:** `Customize::gen_mod` can generate a `mod.rs` for the emitted
+  modules.
+- **Breaking:** Constructing `Customize` with a struct literal must now set
+  `gen_mod` or use `..Default::default()`.
+
+### Added
+
+- Added generated `mod.rs` support for more convenient module inclusion.
+
+### Changed
+
+- Updated generated code for Rust 1.81 Clippy compatibility.
+
+## [0.6.3] - 2024-09-27
+
+> This release was yanked from crates.io.
+
+### Changed
+
+- Simplified generated shared handlers from `Arc<Box<T>>` to `Arc<T>`.
+
+## [0.6.2] - 2023-09-15
+
+### Changed
+
+- Added Clippy allowances to generated files so downstream lint runs do not
+  report generator-owned warnings.
+
+## [0.4.4] - 2023-06-19
+
+### Changed
+
+- Generated async clients now send requests through a shared `&Client`.
+
+## [0.4.3] - 2023-02-27
+
+### Changed
+
+- Updated the Protocol Buffers 2.x dependency line.
+
+## [0.5.1] - 2022-09-15
+
+### Added
+
+- Backported proto3 optional field support to the 0.5 release line.
+
+## [0.4.2] - 2022-09-15
+
+### Added
+
+- Backported proto3 optional field support to the 0.4 release line.
+
+## [0.6.1] - 2022-09-14
+
+### Added
+
+- Declared proto3 optional field support through the `protoc` plugin
+  protocol.
+
+## [0.6.0] - 2022-08-12
+
+> This release was yanked from crates.io.
+
+### API changes
+
+- **Added:** Generated service traits and clients support client-streaming,
+  server-streaming, and bidirectional RPC methods.
+- **Migration:** Regenerate bindings to expose streaming methods; existing
+  unary service definitions retain their unary interfaces.
+
+### Added
+
+- Added generation for client-streaming, server-streaming, and
+  bidirectional RPC bindings.
+
+## [0.5.0] - 2021-12-22
+
+### API changes
+
+- **Changed:** Generated async client methods accept a shared `&Client`
+  instead of requiring mutable access.
+- The compiler's hand-written `Customize` API remains compatible with 0.4.
+
+### Changed
+
+- Generated async clients now allow requests through a shared `&Client`.
+
+## [0.4.1] - 2021-11-26
+
+### Added
+
+- Added macOS-compatible generated bindings.
+
+### Changed
+
+- Updated Prost code generation dependencies.
+
+## [0.4.0] - 2021-02-24
+
+### API changes
+
+- **Breaking:** Generated client and server method signatures now carry
+  request metadata and timeout contexts.
+- **Migration:** Regenerate bindings and update service implementations and
+  client calls to pass the new context values.
+
+### Added
+
+- Added metadata and timeout contexts to generated client and server method
+  signatures.
+
+## [0.3.2] - 2020-08-17
+
+### Changed
+
+- Improved crate documentation and crates.io metadata.
+
+## [0.3.1] - 2020-07-17
+
+### Added
+
+- Added async client and server binding generation.
+- Added programmatic generation without invoking `protoc`.
+
+### Changed
+
+- Added repository and homepage metadata.
+
+## [0.3.0] - 2020-07-17
+
+### API changes
+
+- Initial public compiler API, `Customize` options, synchronous service
+  generation, and `protoc` plugin interface.
+
+### Added
+
+- Initial standalone ttrpc compiler crate and `protoc` plugin.
+- Added synchronous client and server binding generation.
+
+[Keep a Changelog]: https://keepachangelog.com/en/2.0.0/
+[Semantic Versioning]: https://semver.org/spec/v2.0.0.html
+[0.8.0]: https://github.com/containerd/ttrpc-rust/compare/1d4cdeaf...f31f5925
+[0.7.0]: https://github.com/containerd/ttrpc-rust/compare/b9e9dd8a...1d4cdeaf
+[0.6.3]: https://github.com/containerd/ttrpc-rust/compare/6fe7d395...b9e9dd8a
+[0.6.2]: https://github.com/containerd/ttrpc-rust/compare/8c275840...6fe7d395
+[0.4.4]: https://github.com/containerd/ttrpc-rust/compare/4acc2d06...e2115960
+[0.4.3]: https://github.com/containerd/ttrpc-rust/compare/bd4afad1...4acc2d06
+[0.5.1]: https://github.com/containerd/ttrpc-rust/compare/8ab2d30d...5a18aa1d
+[0.4.2]: https://github.com/containerd/ttrpc-rust/compare/790638a3...bd4afad1
+[0.6.1]: https://github.com/containerd/ttrpc-rust/compare/fbe8cb95...8c275840
+[0.6.0]: https://github.com/containerd/ttrpc-rust/compare/8ab2d30d...fbe8cb95
+[0.5.0]: https://github.com/containerd/ttrpc-rust/compare/790638a3...8ab2d30d
+[0.4.1]: https://github.com/containerd/ttrpc-rust/compare/e14aa825...790638a3
+[0.4.0]: https://github.com/containerd/ttrpc-rust/compare/4bebaa0f...e14aa825
+[0.3.2]: https://github.com/containerd/ttrpc-rust/compare/7e3634e0...4bebaa0f
+[0.3.1]: https://github.com/containerd/ttrpc-rust/commits/7e3634e0
+[0.3.0]: https://crates.io/crates/ttrpc-compiler/0.3.0
diff --git a/ttrpc-codegen/CHANGELOG.md b/ttrpc-codegen/CHANGELOG.md
new file mode 100644
index 00000000..7e8f4f27
--- /dev/null
+++ b/ttrpc-codegen/CHANGELOG.md
@@ -0,0 +1,179 @@
+# Changelog
+
+All notable changes to the `ttrpc-codegen` crate are documented in this file.
+
+The format is based on [Keep a Changelog], and this project follows
+[Semantic Versioning]. Historical entries were reconstructed from the
+published crates and Git history. Release dates are crates.io publication
+dates. Releases are ordered by publication date because multiple version
+lines were maintained in parallel.
+
+## [0.6.0] - 2025-07-15
+
+### API changes
+
+- **Changed:** Generated bindings target the newer Protocol Buffers APIs;
+  regenerate checked-in bindings when upgrading.
+- The `Codegen` builder interface remains compatible with the 0.5 release
+  line.
+
+### Changed
+
+- Updated Protocol Buffers dependencies and adapted to their newer APIs.
+- Moved dependency management to the Cargo workspace.
+
+## [0.5.0] - 2025-01-15
+
+### API changes
+
+- **Changed:** `Codegen::run` uses Cargo's `OUT_DIR` when `out_dir` was not
+  configured explicitly.
+- **Migration:** Build scripts that require another location should continue
+  to call `Codegen::out_dir`.
+
+### Added
+
+- Used Cargo's `OUT_DIR` when no explicit output directory is configured.
+
+### Changed
+
+- Updated `protobuf-codegen` and Rust 1.81 Clippy compatibility.
+
+## [0.2.4] - 2023-06-19
+
+### Changed
+
+- Updated `ttrpc-compiler` to 0.4.4 so generated async clients can use a
+  shared `&Client`.
+
+## [0.4.2] - 2023-04-14
+
+### Added
+
+- Added `rust-protobuf` element customization callbacks.
+
+### Changed
+
+- Updated Protocol Buffers dependencies to 3.2.
+
+## [0.2.3] - 2023-02-27
+
+### Fixed
+
+- Fixed Clippy warnings in the 0.2 compatibility release line.
+
+## [0.3.2] - 2022-10-14
+
+### Changed
+
+- Updated the pure Protocol Buffers generator dependency.
+- Updated generated code for current Clippy checks.
+
+## [0.2.2] - 2022-10-14
+
+### Changed
+
+- Backported Protocol Buffers generator and Clippy compatibility updates.
+
+## [0.3.1] - 2022-09-15
+
+### Changed
+
+- Replaced the former pure codegen dependency with the optional pure mode in
+  `protobuf-codegen`.
+
+## [0.2.1] - 2022-09-15
+
+### Changed
+
+- Backported optional Protocol Buffers code generation support.
+
+## [0.4.1] - 2022-09-14
+
+### Changed
+
+- Updated generated bindings from Protocol Buffers 2 to Protocol Buffers 3.
+
+## [0.4.0] - 2022-08-12
+
+> This release was yanked from crates.io.
+
+### API changes
+
+- **Added:** Generated clients and services support client-streaming,
+  server-streaming, and bidirectional RPC methods.
+- **Migration:** Regenerate bindings to expose streaming methods; existing
+  unary service definitions retain their unary interfaces.
+
+### Added
+
+- Added generation for client-streaming, server-streaming, and
+  bidirectional RPC services through the updated compiler.
+
+## [0.3.0] - 2021-12-22
+
+### API changes
+
+- **Changed:** Generated async clients send requests through a shared
+  `&Client` instead of requiring mutable access.
+- The `Codegen` builder interface remains compatible with the 0.2 release
+  line.
+
+### Changed
+
+- Updated the compiler so generated async clients can send through a shared
+  `&Client`.
+- Corrected and tested build-script documentation.
+
+## [0.2.0] - 2021-02-24
+
+### API changes
+
+- **Breaking:** Generated client and server method signatures now carry
+  request metadata and timeout contexts.
+- **Migration:** Regenerate bindings and update service implementations and
+  client calls to pass the new context values.
+
+### Added
+
+- Added metadata and timeout context generation for service methods.
+
+### Changed
+
+- Updated the compiler dependency to 0.4.
+
+## [0.1.2] - 2020-09-03
+
+### Fixed
+
+- Preserved `rust-protobuf` customization when generating message code.
+
+## [0.1.1] - 2020-07-20
+
+### API changes
+
+- Initial public `Codegen` builder for build-script-driven ttrpc binding
+  generation.
+
+### Added
+
+- Initial pure-Rust `Codegen` builder for generating ttrpc bindings from
+  `.proto` files.
+
+[Keep a Changelog]: https://keepachangelog.com/en/2.0.0/
+[Semantic Versioning]: https://semver.org/spec/v2.0.0.html
+[0.6.0]: https://github.com/containerd/ttrpc-rust/compare/1d4cdeaf...f31f5925
+[0.5.0]: https://github.com/containerd/ttrpc-rust/compare/22cd9ca4...1d4cdeaf
+[0.2.4]: https://github.com/containerd/ttrpc-rust/compare/4b90ee15...8968bfad
+[0.4.2]: https://github.com/containerd/ttrpc-rust/compare/5d1d5dcd...22cd9ca4
+[0.2.3]: https://github.com/containerd/ttrpc-rust/compare/6b787f9d...4b90ee15
+[0.3.2]: https://github.com/containerd/ttrpc-rust/compare/5a18aa1d...a42b31cb
+[0.2.2]: https://github.com/containerd/ttrpc-rust/compare/bd4afad1...6b787f9d
+[0.3.1]: https://github.com/containerd/ttrpc-rust/compare/8ab2d30d...5a18aa1d
+[0.2.1]: https://github.com/containerd/ttrpc-rust/compare/eef20041...bd4afad1
+[0.4.1]: https://github.com/containerd/ttrpc-rust/compare/fbe8cb95...5d1d5dcd
+[0.4.0]: https://github.com/containerd/ttrpc-rust/compare/8ab2d30d...fbe8cb95
+[0.3.0]: https://github.com/containerd/ttrpc-rust/compare/eef20041...8ab2d30d
+[0.2.0]: https://github.com/containerd/ttrpc-rust/compare/9ea607a6...eef20041
+[0.1.2]: https://github.com/containerd/ttrpc-rust/compare/ec2a9193...9ea607a6
+[0.1.1]: https://github.com/containerd/ttrpc-rust/commits/ec2a9193