Changelog

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All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.1.0] - 2026-07-10

Added

  • Initial release of AshDyan.
  • dyan DSL extension for declaring analyzable fields on Ash resources.
  • Domain-level dyan registry via AshDyan.Domain.
  • Runtime analysis engine (AshDyan.run/1,2) supporting:
    • frequency / group-by counts
    • numeric aggregates (sum, avg, min, max, count, count_distinct, stddev, variance, median)
    • time bucketing
    • percentiles
    • histograms
  • In-memory aggregation bounded by max_limit, max_group_by, and query_timeout.
  • Capability check API (AshDyan.supports?/2) for data-layer limits.
  • Structured errors via AshDyan.Error with stable reason atoms.
  • Chart adapter (AshDyan.Charts.to_chartjs/1).
  • Documentation guides (guides/usage.md, guides/design.md).

Changed

  • Removed the shipped Phoenix/Channel/gen_api adapter modules (AshDyan.Adapters.*). AshDyan is now fully standalone — no plug dependency at compile time. Delivery layers are documented as copy-paste snippets (see README "Building an adapter") rather than versioned APIs.
  • :sum now rejects nil values before reducing (matching every other aggregate), so a column with a nil no longer raises ArithmeticError.
  • AshDyan.Engine.apply_filters/2 documents that filters are parsed internally via Ash.Filter.parse/2 (not filter_input) so the dyan whitelist stays the security boundary.
  • AshDyan.Info.analyzable_field/3 typespec now includes :histogram.