Merge remote-tracking branch 'origin/main' into workspace-28

# Conflicts:
#	docs/implementation.md

docs/implementation.md

@@ -184,3 +184,14 @@ Documentation only; no runtime tests were run.
 - Validation passed: all 91 frontend tests, analyze app and sxchnge_kyc,
   format check of all 9 affected Dart files, web build and diff checks.
 - Delivery: [PR #23](https://git.sendico.io/tech/sxchnge/pulls/23), unmerged. Merge #21 first and retarget #23 to main.
+
+## UX simplicity preference
+
+Task [#26](https://git.sendico.io/tech/sxchnge/issues/26), delivered in
+[PR #27](https://git.sendico.io/tech/sxchnge/pulls/27) on `skills-26`, makes
+simplicity an explicit preference in the UX Design skill and its review checklist.
+Prefer fewer concepts, choices, and controls when they serve the same need; retain
+essential information, accessibility, and recovery. Documentation only.
+Validation: skill-creator `quick_validate.py` passed in an isolated environment
+with PyYAML (the system Python lacked it); `git diff --check` passed. No runtime
+tests were needed. The PR is not merged.

skills/ux-design/SKILL.md

@@ -10,6 +10,10 @@ before reporting it complete. Rendering correctly is only one part of completion
 
 ## Establish the flow
 
+- Prefer the simplest interface that lets users complete their task confidently.
+  When options meet the same need, choose fewer concepts, choices, and controls.
+  Add complexity only for a concrete user need; preserve essential information,
+  accessibility, and recovery rather than hiding them to make a screen look minimal.
 - Identify the user's primary task, successful outcome, and shortest appropriate
   path to that outcome before choosing layouts or controls.
 - Inspect comparable product flows, components, navigation, terminology, and
@@ -95,6 +99,8 @@ performed and any gaps; do not mark applicable unmet criteria as complete.
 - [ ] Are interactive elements recognizable, and can the user tell what is
   happening and what will happen next?
 - [ ] Are steps appropriate, with unnecessary interaction and cognitive load removed?
+- [ ] Is this the simplest usable solution, with each added concept, choice, or
+  control serving a concrete user need?
 - [ ] Does the flow follow existing product patterns and consistent terminology,
   with a concrete reason for any departure?
 - [ ] Can users recover from errors, with input and context preserved where appropriate?