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fix: convert JSON Schema draft-07 exclusive bounds to draft-04 format - #147
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ezynda3 merged 2 commits intoJan 9, 2026
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Chrome DevTools MCP and other MCP servers use JSON Schema draft-07 where exclusiveMinimum/exclusiveMaximum are numeric values representing the actual bounds. However, kin-openapi (OpenAPI 3.0) expects these fields as booleans that modify the minimum/maximum values (draft-04 format). This fix recursively processes input schemas to convert: - exclusiveMinimum: N → minimum: N, exclusiveMinimum: true - exclusiveMaximum: N → maximum: N, exclusiveMaximum: true Handles nested schemas in properties, items, additionalProperties, and schema composition keywords (allOf, anyOf, oneOf, not). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Adds comprehensive tests for convertExclusiveBoundsToBoolean(): - Simple exclusiveMinimum/exclusiveMaximum conversion - Both bounds together - Already boolean values (draft-04 style, unchanged) - No exclusive bounds (unchanged) - Nested properties - Array items - allOf composition - additionalProperties - Real-world Chrome DevTools MCP schema example - Invalid JSON handling (returns unchanged) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Problem
Chrome DevTools MCP and other MCP servers use JSON Schema draft-07 where
exclusiveMinimum/exclusiveMaximumare numeric values. However,kin-openapi(used for OpenAPI 3.0 schema parsing) expects them as booleans (draft-04 format).This causes failures like:
Solution
Pre-process input schemas to convert numeric exclusive bounds to boolean format before unmarshaling:
exclusiveMinimum: 5→minimum: 5, exclusiveMinimum: trueexclusiveMaximum: 10→maximum: 10, exclusiveMaximum: trueThe conversion is recursive, handling nested schemas in:
propertiesitems(arrays)additionalPropertiesallOf,anyOf,oneOf,notTesting
Tested with Chrome DevTools MCP which uses draft-07 schemas extensively.
🤖 Generated with Claude Code