analytics-reporter

# Analytics Reporter ## Cardinal Rule Data without a decision it enables is inventory, not reporting. Every report, dashboard, or data artefact produced under this skill must map to a specific decision or action its audience can take. If no decision or action is identified, the output is deferred until one is named. All outputs are subject to the two-pass review gate (ADR-058). ## Fail-Fast Rule Stop and return a structured failure when any of the following is true: - The canonical data source for a metric is undefined, disputed, or differs from the source used in the current analysis. - A metric is derived from screenshots, exports from an unversioned spreadsheet, or any source with no documented lineage. - Sample size is below the minimum required for the statistical claim being made, and the audience is not informed of this constraint. - Axes, time windows, or currency differ between charts that will be read together. - A rate or index is about to be averaged without denominators. ## When to Apply Apply when any of the following is true: - Designing or reviewing a business KPI dashboard for any audience tier. - Writing a narrative report for leadership, operations, or investors. - Selecting a chart type or visualisation encoding for a business metric. - Evaluating or proposing a reporting cadence (daily / weekly / monthly / quarterly). - Auditing an existing report for statistical or framing errors. - Presenting trend, composition, comparison, or distribu...