Common Expression Language Files

Features & Enhancements

This release introduces features for richer configuration-based CEL, AI prompt generation from config files, additional documentation, and 3x performance when evaluating traced / state-tracking expressions. This release also introduces a unit test runner framwork.

#1141: Expose extension option factory as a public method

#1143: Add a new compiler tool which can be used to compile CEL expressions and policies using serialized environment

#1151: Lightweight observable evaluation

#1155: Utilities for formatting and parsing documentation strings

#1156: Support for documentation and example strings in CEL environments

#1158: Re-export interpreter.AttributePattern in package cel.

#1159: Document the standard library macros and functions

#1160: Prompt generation for AI-assisted authoring based on a CEL environment

#1117: Add LateFunctionBinding declaration and fix constant folding

#1163: Initialize stateful observers prior to evaluation

#1164: Unparse Expr values to strings

#1149: Add test runner library

#1167: REPL: Add an extension option for two var comprehensions

Fixes

Several fixes were implemented, including updating strings.format to better adhere to the specification, correcting constant folding logic alongside the late binding feature, removing a non-functional check in test code, and adding argument count validation for optFieldSelect.

#1133: Update strings.format to adhere to the specification

#1117: Add LateFunctionBinding declaration and fix constant folding

#1161: Remove non-functional optional check in test-only selection

#1168: Check arg count when validating optFieldSelect

Refactoring & Internal Improvements

General refactoring was performed across the codebase. Coverage and comments for Activation methods were improved. The test runner library was refactored to create options from flags and improve code structure.

#1145: Refactoring changes

#1150: Additional comments and coverage for Activation methods

#1165: Refactoring changes to create a test runner option from passed flags, correct indentation and add package level comment for test

Documentation

Documentation was enhanced, including updates to the NativeTypes documentation regarding the cel tag, adding documentation for the optional library, and documenting the standard library functions/macros as part of the documentation string feature.

#1148: Update NativeTypes doc to reflect how to enable cel tag

#1155: Utilities for formatting and parsing documentation strings

#1156: Support for documentation and example strings in CEL environments

#1159: Document the standard library macros and functions

#1162: Document optional library and increase docs coverage

Build System

Configuration fixes were made for Bzlmod compatibility.

#1146: Bzlmod configuration fixes

Type System

Type formatting was updated to correctly handle type parameters.

#1154: Update type formatting for type params