diff --git a/Cargo.lock b/Cargo.lock
index 84025c7..c6dc101 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -677,7 +677,7 @@ dependencies = [
 
 [[package]]
 name = "socketry-project"
-version = "0.3.8"
+version = "0.3.9"
 dependencies = [
  "bake",
  "bake-agent-context",
diff --git a/Cargo.toml b/Cargo.toml
index ea8ff88..370f1dc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "socketry-project"
-version = "0.3.8"
+version = "0.3.9"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/socketry/socketry-project-rust"
diff --git a/bake/Cargo.toml b/bake/Cargo.toml
index f763eae..38551d1 100644
--- a/bake/Cargo.toml
+++ b/bake/Cargo.toml
@@ -7,4 +7,4 @@ publish = false
 [dependencies]
 bake = "0.19.0"
 bake-markdown = "0.3.0"
-socketry-project = { path = "..", version = "0.3.8" }
+socketry-project = { path = "..", version = "0.3.9" }
diff --git a/context/conventions.md b/context/conventions.md
index bd8f6b4..921e346 100644
--- a/context/conventions.md
+++ b/context/conventions.md
@@ -22,7 +22,7 @@ Keep public paths independent of redundant namespace layers such as `bake_agent_
 ## Source naming
 
 - Use `snake_case` for modules, source files, functions, methods, and variables. Use `UpperCamelCase` for structs, enums, traits, and type parameters.
-- Preserve established initialisms in type and trait names: write `HTMLRenderer`, `HTTPClient`, and `URLParser`, rather than `HtmlRenderer`, `HttpClient`, or `UrlParser`. Keep filenames lowercase `snake_case`, such as `html_renderer.rs`, `http_client.rs`, and `url_parser.rs`.
+- Treat acronyms and initialisms as single words in `UpperCamelCase`, following the [Rust API Guidelines](https://rust-lang.github.io/api-guidelines/naming.html#casing-conforms-to-rfc-430-c-case): write `HtmlRenderer`, `HttpClient`, `UrlParser`, and `FileIo`. Use lowercase acronyms in `snake_case`, including filenames such as `html_renderer.rs`, `http_client.rs`, and `file_io.rs`. This keeps Socketry's Rust APIs consistent with the Rust ecosystem; names required by external APIs retain their original spelling.
 - Make public type and trait names fully descriptive; include the kind of thing being named instead of relying on the module path to supply it. For example, use `io_stream::BufferedStream` rather than `io_stream::Buffered`.
 - Prefer clear, consistent names. Avoid abbreviations unless they are an established domain initialism or required by an external API.
 - Give each primary public struct, enum, or trait its own source file, named after the item using lowercase `snake_case`. Keep small, closely related helper types alongside it when that makes the code easier to understand.
diff --git a/readme.md b/readme.md
index 89e5b38..e658623 100644
--- a/readme.md
+++ b/readme.md
@@ -39,6 +39,10 @@ Prepare a release with `cargo bake cargo:version:patch` (or `minor`, `major`, or
 
 See [releases.md](releases.md) for the full release history.
 
+### v0.3.9
+
+- Follow Rust acronym casing in type and trait names, using `HtmlRenderer`, `HttpClient`, `UrlParser`, and `FileIo`.
+
 ### v0.3.8
 
 - Let Cargo select setup dependency versions while retaining open-ended minimum requirements.
@@ -49,12 +53,6 @@ See [releases.md](releases.md) for the full release history.
 - Require a stable aggregate test and coverage result alongside publishing checks.
 - Clarify merge gates and repository-owned agent guidance in the shared conventions.
 
-### v0.3.6
-
-- Normalize standard project Markdown files after version bumps.
-- Fix the version bump hook's invocation of the Markdown normalizer.
-- Include `bake-markdown` 0.3.0 in the shared task set so version bumps use hyphen markers for unordered lists.
-
 <!-- bake-readme:releases:end -->
 
 ## See Also
diff --git a/releases.md b/releases.md
index 3e60811..8860272 100644
--- a/releases.md
+++ b/releases.md
@@ -1,5 +1,9 @@
 # Releases
 
+## v0.3.9
+
+- Follow Rust acronym casing in type and trait names, using `HtmlRenderer`, `HttpClient`, `UrlParser`, and `FileIo`.
+
 ## v0.3.8
 
 - Let Cargo select setup dependency versions while retaining open-ended minimum requirements.