chore: version skills

skills/engineering/to-tickets/SKILL.md

@@ -103,3 +103,5 @@ The end-to-end behaviour this ticket makes work, from the user's perspective —
 </issue-template>
 
 In either form, avoid specific file paths or code snippets — they go stale fast. Exception: if a prototype produced a snippet that encodes a decision more precisely than prose can (state machine, reducer, schema, type shape), inline it and note briefly that it came from a prototype. Trim to the decision-rich parts — not a working demo, just the important bits.
+
+Work the frontier one ticket at a time with `/implement`, clearing context between tickets.