DashBoard/openspec/changes/archive/2026-02-08-p1-cache-query-efficiency/specs/frontend-compute-shift/spec.md

ADDED Requirements

Requirement: Reusable Browser Compute Modules SHALL Power Report Derivations

Derived computations for report filters, KPI cards, chart series, and table projections SHALL be implemented through reusable frontend modules.

Scenario: Shared report derivation logic

• WHEN multiple report pages require equivalent data-shaping behavior
• THEN pages MUST consume shared compute modules instead of duplicating transformation logic per page

Requirement: Browser Compute Shift SHALL Preserve Export and Field Contracts

Moving computations to frontend MUST preserve existing field naming and export column contracts.

Scenario: User exports report after frontend-side derivation

• WHEN transformed data is rendered and exported
• THEN exported field names and ordering MUST remain consistent with governed field contract definitions