Bump version to 0.28.4-beta

Update changelog and breaking notes for the Tip display fix
(parameterized strategy type name now shown correctly in show output).

Author: ocots

BREAKING.md

@@ -2,6 +2,18 @@
 
 This document outlines all breaking changes introduced in CTBase v0.18.0-beta compared to v0.17.4. Use this guide to migrate your code and understand the impact of these changes.
 
+## Non-breaking note (0.28.4-beta)
+
+- **`Strategies`: Tip line in `show` now displays the parameterized type
+  name.** The `Base.show(io, MIME"text/plain", strategy)` method previously
+  used `type_name` (`nameof(T)`) in the Tip message, causing parameterized
+  instances like `DifferentiationInterface{GPU}()` to show
+  `describe(DifferentiationInterface)` instead of
+  `describe(DifferentiationInterface{GPU})`. The fix replaces `type_name`
+  with `display_name`, which already includes the parameter. **No breaking
+  change**: purely a display fix with no API or behavior change beyond the
+  corrected Tip text. No migration required.
+
 ## Non-breaking note (0.28.3-beta)
 
 - **`Differentiation`: `build_ad_backend` removed from the public API.**

CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to CTBase will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.28.4-beta] - 2026-07-23
+
+### 🐛 Bug Fixes
+
+#### **Strategies** — Tip line in `show` now shows parameterized type name
+
+- **`Base.show(io, MIME"text/plain", strategy)`**: the Tip message now uses
+  `display_name` (which includes the parameter, e.g.
+  `DifferentiationInterface{GPU}`) instead of `type_name` (just
+  `nameof(T)`). Previously, a parameterized strategy instance like
+  `DifferentiationInterface{GPU}()` would display
+  `Tip: use describe(DifferentiationInterface)` instead of
+  `Tip: use describe(DifferentiationInterface{GPU})`.
+- Added tests with a fake parameterized strategy to verify both the
+  non-parameterized and parameterized cases.
+
 ## [0.28.3-beta] - 2026-07-22
 
 ### 🛠 Enhancements

Project.toml

@@ -1,6 +1,6 @@
 name = "CTBase"
 uuid = "54762871-cc72-4466-b8e8-f6c8b58076cd"
-version = "0.28.3-beta"
+version = "0.28.4-beta"
 authors = ["Olivier Cots <olivier.cots@irit.fr>", "Jean-Baptiste Caillau <caillau@univ-cotedazur.fr>"]
 
 [deps]