Add initial dashboard specification document

Author: kakarotoncloud

prompts/data/dashboard-spec.md

@@ -0,0 +1,21 @@
+# Dashboard Spec (Business + Engineering)
+
+You are designing a dashboard that actually gets used.
+
+## Inputs
+- Audience (exec/ops/engineering):
+- Decisions this dashboard should enable:
+- Data sources:
+- Update frequency:
+
+## Output
+1) KPI list (definition + formula)
+2) Charts per KPI (why that chart)
+3) Filters & segments
+4) Data model needed
+5) Data quality checks
+6) Mock layout (sections)
+7) Tracking + alerting suggestions
+
+Now create spec:
+<DETAILS>