feat(lint): add UncheckedFlagAccess, ExpiredFeatureFlag, and InvalidFlagReference detectors#176
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kirich1409 merged 3 commits intomainfrom Apr 29, 2026
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Detects @BehindFlag/@AssumesFlag annotations whose flagName does not match any ConfigParam property in the same file. Skips files with no ConfigParam declarations to avoid false positives from generated code. Also fixes pre-existing compile errors in ExpiredFeatureFlagDetector and UncheckedFlagAccessDetector (ambiguous overload, missing uastContents API) and adds their test files that were present but never committed.
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Detects ConfigParam properties annotated with @ExpiresAt where the date has passed. Rewrites the previous broken implementation to use getApplicableUastTypes + visitAnnotation, which avoids the duplicate-fire issue caused by Kotlin @target(PROPERTY, FIELD) generating two UAST annotation nodes from the same KtAnnotationEntry. Deduplicates remaining visits via sourcePsi identity tracking within the file handler. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Adds three Android Lint detectors to
featured-lint-rules.Closes #157
Closes #158
Closes #159
Changes
UncheckedFlagAccessDetector
UAST scanner for
UCallExpression. Resolves@BehindFlagvia PSI (SOURCE retention workaround). Walks the UAST parent chain for guard contexts:if/whenreferencing the flag by name, or an enclosing@BehindFlag-annotated function. v1 scope: direct calls only — callable references, companion scope escape, and@AssumesFlagdeferred.ExpiredFeatureFlagDetector
Visits
@ExpiresAtannotations onConfigParamproperties. Parses the ISO-8601 date and reports if it is in the past. Deduplicates viavisitedSourceElementsto avoid double-firing from@Target(PROPERTY, FIELD).InvalidFlagReferenceDetector
File-level UAST scanner. Collects
ConfigParamproperty names in the file, then validates@BehindFlag/@AssumesFlagflagNamearguments against them. Skips files with noConfigParamdeclarations to avoid false positives on generated code.Tests
27/27 tests pass (positive + negative cases for each detector).