diff --git a/CHANGELOG.md b/CHANGELOG.md
index 104d2c4..4b61d54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+(none)
+
+## 0.3.0 — 2026-09-29
+
 - Windows is a supported platform: the script reconfigures stdout to UTF-8, so the report
   is byte-identical on legacy Windows console codepages (cp437/cp1252) instead of crashing
   with `UnicodeEncodeError` mid-report. Regression-tested; a CI `portability` job runs the
diff --git a/skills/interface-matrix/SKILL.md b/skills/interface-matrix/SKILL.md
index cf321d5..8f2f8f1 100644
--- a/skills/interface-matrix/SKILL.md
+++ b/skills/interface-matrix/SKILL.md
@@ -5,7 +5,7 @@ license: MIT
 compatibility: "Requires Python 3.9 or newer (Windows: py -3). Standard library only — no dependencies and no install step."
 metadata:
   author: macblackstuff
-  version: 0.2.1
+  version: 0.3.0
 ---
 
 # interface-matrix