fix: add edge runtime compatibility for Cloudflare Workers #17
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Make the SDK compatible with edge runtimes (Cloudflare Workers, Vercel Edge, Deno Deploy) by gracefully handling missing Node.js APIs: - Lazy-load fs module for context_line extraction in exceptions.ts - Guard process.once signal handlers in eventQueue.ts - Lazy-load fs/os/path modules in logging.ts with console fallback - Guard process.cwd() calls which may not exist in edge environments - Update mcpcat-api dependency to 0.1.6 Add comprehensive test suite for edge runtime compatibility scenarios.
MCP SDK 1.23.0 now supports both Zod v3 and v4, which have different internal structures. This caused context parameter injection to fail. Changes: - Add zod-compat.ts with version-agnostic detection and utilities - Update context-parameters.ts to use zod-compat utilities - Update tracingV2.ts to use zod-compat for schema shape access - Update Zod dependency to support both v3 and v4 - Add comprehensive tests for zod-compat utilities Tested with MCP SDK versions 1.21.2 and 1.23.0.
kashishhora
approved these changes
Nov 26, 2025
| cwd = process.cwd(); | ||
| } | ||
| } catch { | ||
| // process.cwd() not available in this environment |
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Summary
Changes
Test plan
pnpm test)