release/26.4.0 - #39

Merged

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mainfrom

Apr 14, 2026

Commits on Apr 30, 2025

Merge branch 'main' into develop
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Commits on May 1, 2025

release/25.5.0
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0fcd288

Commits on Oct 28, 2025

merge feature into develop (#37)

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14a7729

Commits on Apr 3, 2026

Add design spec for expression-based rules engine rearchitecture

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docs: add implementation plan for expression-based rules engine

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Task 1: clean slate — remove old engine code and update dependencies

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feat: replace constants and dimension models with ibis-free implementations

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9e4a970

Commits on Apr 6, 2026

feat(context): replace ContextHelper class with extract_context_values function

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feat(compiler): add DimensionCompiler with EXACT strategy

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feat(compiler): implement RANGE and REGEX dimension strategies

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feat(result): add RuleResult wrapper with convenience accessors for evaluated rule DataFrames

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feat(engine): replace RulesEngine with ExpressionRulesEngine for single-pass evaluation

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test(engine): add Tasks 9 and 10 — advanced features and custom expressions tests

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test(integration): add end-to-end hierarchical rules scenarios

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feat: update public API, fixtures, and remove leftover old test files

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style: fix unused imports in compiler.py and context.py

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8990411

Commits on Apr 7, 2026

docs: add design spec for extended match strategies

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docs: add implementation plan for extended match strategies

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feat(constants): add 8 new MatchStrategy enum values
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feat(dimension): add validation for new match strategies (Task 2)

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feat(compiler): add NOT_EQUAL, GREATER_THAN, LESS_THAN match strategies (Tasks 3 & 4)

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feat: add PREFIX strategy with shared _compile_string_match helper

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feat: add SUFFIX and CONTAINS match strategies

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docs: add accumulator engine architecture analysis

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test: add per-row regex test to TestRegexCompilation

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docs: add rules engine landscape & roadmap analysis

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refactor(compiler): use clean string-match helper for CONTAINS and REGEX

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docs: correct additive rules engine analysis after PMX_DB review

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docs: add Big 4 mortgage pricing engine case study

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Task 8: Add SET_MEMBERSHIP and SET_EXCLUSION match strategies

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Task 9: Add fraud detection integration test for mixed strategies

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Add backend agnosticism smoke tests for compiler strategies

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docs: add match strategies catalog to CLAUDE.md

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Commits on Apr 8, 2026

docs: add design spec for backend-agnostic engine and result

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docs: add implementation plan for backend-agnostic engine and result

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test(backend-purity): add import-check test + tag SET_MEMBERSHIP exception

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refactor(engine): rewrite engine.py to be backend-agnostic via mountainash.relations.Relation

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refactor(result): use mountainash.relations for all RuleResult accessors

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docs: spec for cross-backend test parameterisation

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docs: implementation plan for cross-backend test parameterisation

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test: rewrite conftest for cross-backend parameterisation

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fix: REGEX as one-hot; cast specificity; drop double collect

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test(result): parametrize across all 7 backends

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test(integration): parametrize all classes across backends

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test(compiler): extend backend agnosticism smoke tests to 7 backends

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test: link upstream-broken backend xfails to issues

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refactor: remove SET_MEMBERSHIP Polars workaround

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Commits on Apr 11, 2026

test: add #77 regression test, restore pandas/narwhals-pandas xfails

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refactor: replace blanket backend xfails with surgical per-test markers

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fix: remove #77 xfails after upstream fix, restore #78 ibis-polars xfails

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Merge pull request #38 from mountainash-io/feature/expression-based-engine
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release/26.4.0

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Merge branch 'main' into release/26.4.0
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ci: bump hatch 1.14.2→1.16.5, hatchling 1.25.0→1.29.0

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Commits on Apr 12, 2026

chore: rename mountainash-expressions to mountainash in references

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96bda3b

Commits on Apr 14, 2026

chore: clean up dependency config after mountainash rename

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ci: add debug output to diagnose missing-dataframes error

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