diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbf31299..9a787500 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,33 @@
 
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [0.12.3] - 2026-08-03
+
+### Added
+
+- Experimental API symbol queries through `jo compile --query`, with symbol
+  and source-file selectors, JSON output, optional field selection, and support
+  for querying source files or loaded SAST libraries. ([#85])
+- Third-party GitHub template support for `jo new`, including template listing,
+  multi-template manifests, pinned Git refs, and preservation of executable
+  bits and symlinks when `git` is available. ([#86])
+
+### Security
+
+- Template manifests and archive paths are validated to prevent absolute paths,
+  parent traversal, duplicate output ownership, and writes outside the target
+  project. Scaffolding is atomic and templates cannot run setup hooks. ([#86])
+
+### Compatibility
+
+- Existing `jo new <name>` and `jo new --lib <name>` behavior is unchanged.
+  Template scaffolding is opt-in through `--template`. ([#86])
+- API queries are an additive, experimental compiler mode. Existing compilation
+  and documentation-generation commands are unchanged. ([#85])
+
+[#85]: https://github.com/typescope/jo/pull/85
+[#86]: https://github.com/typescope/jo/pull/86
+
 ## [0.12.2] - 2026-07-25
 
 ### Added
diff --git a/README.md b/README.md
index e468aa2d..16c59788 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
   <p>For the joy of secure programming</p>
 
   [![CI](https://github.com/typescope/jo/actions/workflows/ci.yml/badge.svg)](https://github.com/typescope/jo/actions/workflows/ci.yml)
-  [![Release](https://img.shields.io/badge/release-v0.12.2-blue.svg)](https://github.com/typescope/jo/releases/tag/v0.12.2)
+  [![Release](https://img.shields.io/badge/release-v0.12.3-blue.svg)](https://github.com/typescope/jo/releases/tag/v0.12.3)
   [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
   [![Docs](https://img.shields.io/badge/docs-jo--lang.org-teal.svg)](https://jo-lang.org)
 </div>
diff --git a/docs/public/versions.jsonl b/docs/public/versions.jsonl
index eec1d241..10182ada 100644
--- a/docs/public/versions.jsonl
+++ b/docs/public/versions.jsonl
@@ -8,3 +8,4 @@
 {"version":"0.12.0","url":"https://github.com/typescope/jo/releases/download/v0.12.0/jo-0.12.0.tar.gz","sha256url":"https://github.com/typescope/jo/releases/download/v0.12.0/jo-0.12.0.tar.gz.sha256","date":"2026-07-16"}
 {"version":"0.12.1","url":"https://github.com/typescope/jo/releases/download/v0.12.1/jo-0.12.1.tar.gz","sha256url":"https://github.com/typescope/jo/releases/download/v0.12.1/jo-0.12.1.tar.gz.sha256","date":"2026-07-16"}
 {"version":"0.12.2","url":"https://github.com/typescope/jo/releases/download/v0.12.2/jo-0.12.2.tar.gz","sha256url":"https://github.com/typescope/jo/releases/download/v0.12.2/jo-0.12.2.tar.gz.sha256","date":"2026-07-25"}
+{"version":"0.12.3","url":"https://github.com/typescope/jo/releases/download/v0.12.3/jo-0.12.3.tar.gz","sha256url":"https://github.com/typescope/jo/releases/download/v0.12.3/jo-0.12.3.tar.gz.sha256","date":"2026-08-03"}
diff --git a/stack-lang/tool/JoVersion.scala b/stack-lang/tool/JoVersion.scala
index 9599a411..9da030f8 100644
--- a/stack-lang/tool/JoVersion.scala
+++ b/stack-lang/tool/JoVersion.scala
@@ -1,4 +1,4 @@
 package tool
 
 object JoVersion:
-  val current: Version = Version(0, 12, 2)
+  val current: Version = Version(0, 12, 3)