Closes

changelog.md

@@ -1,11 +1,28 @@
 # Changelog
 
-This changelog summarizes the Git history through `f17ddb6`. Entries are listed
-newest first. Dates follow the commit author dates. `v1.0` is the existing Git
-tag; subsequent changes have no release tag and are listed as unreleased.
+This changelog summarizes release and development history. Entries are listed
+newest first. Historical dates follow the commit author dates. `v1.0` is the
+existing Git tag; subsequent changes are listed as unreleased.
 
 ## Unreleased
 
+### 2026-10-06
+
+#### Added
+
+- Added `VAL_` signal value descriptions through the statement dispatcher and
+  factory, with complete syntax validation, exact signed/unsigned 64-bit keys,
+  deferred reference resolution, duplicate detection, and source error locations.
+  Distinct keys from multiple statements merge; standard and extended frames
+  remain distinct under existing CAN ID normalization.
+- Preserved descriptions in parsed metadata, runtime decode definitions, and UI
+  tree metadata. Added `DecodedSignalValue::GetValueDescription()` and
+  `FindValueDescription()` for raw integer lookup before physical scaling.
+  Unknown values retain normal numeric decoding.
+- Added regression coverage for syntax, quoting, whitespace, integer boundaries,
+  declaration order, invalid references, duplicates, scaling, and both builders;
+  documented syntax, lookup behavior, and limitations in README.
+
 ### 2026-10-05
 
 #### Changed