diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d07f9b..85e9aca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.10)
 # The single source of truth for the library version. It drives the generated
 # include/akgl/version.h, the shared library's VERSION and SOVERSION, and the
 # Version field in akgl.pc. Bump it here and nowhere else.
-project(akgl VERSION 0.8.0 LANGUAGES C)
+project(akgl VERSION 0.9.0 LANGUAGES C)
 
 # Memory checking reuses the suites that already exist -- `ctest -T memcheck`
 # runs every registered test under valgrind -- rather than adding programs of its
diff --git a/TODO.md b/TODO.md
index 2bd22a2..aeb03ef 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1273,6 +1273,15 @@ engines spend the same frame**.
    cached") with the raw-SDL control row the perf rules require. Budget to
    move: `tests/perf_render.c:391`.
 
+   **The UI subsystem is this cache's second consumer, and the bigger one.**
+   `akgl_ui_execute_commands` (`src/ui.c`) draws every TEXT render command
+   through `akgl_text_rendertextat`, one wrapped line per command per frame —
+   a menu of five rows re-rasterizes five lines at 60 Hz whether or not any
+   of them changed, where the original HUD case was one line changing once a
+   second. Abstract-on-the-second-consumer says this item's time has come;
+   the key already fits, since clay hands the executor stable text bytes
+   between frames.
+
 3. **Non-raising sprite lookup — target 10, a design change.** Give
    `akgl_character_sprite_get` (`src/character.c:84-94`) the companion that
    returns `NULL` without raising, then convert the three sites that raise
@@ -2196,6 +2205,18 @@ a live defect -- but nothing rejects it, and `max_timestep` is caller-settable.
    `renderfunc`. This item is the half that remains: one uniform `scale`, with no way
    to expand a single axis.
 
+3. **`akgl_ControlMap.mouseid` and `.penid` are still dead fields, deliberately.**
+   The UI subsystem (0.9.0) brought the mouse into the library, and it would have
+   been natural to wire these up on the way -- it did not, on purpose. Control maps
+   translate device events into *actor handler calls*, and the UI wants absolute
+   pointer state per event; those are different consumers, and building
+   gameplay-mouse machinery into `src/controller.c` with no game asking for it is
+   the abstract-before-the-second-consumer mistake. The mouse path lives in
+   `src/ui.c` (`akgl_ui_handle_event`); when a game wants mouse-driven actors,
+   *that* is the consumer these fields were declared for, and the work lands in
+   `controller.c` then. Same for `.axis`, `.axis_range_min` and `.axis_range_max`,
+   which `akgl_controller_handle_event` has never consulted.
+
 ## Found while writing the manual
 
 Twenty-one chapters and two tutorial games were written against `src/` rather than