docs: reframe migration guide as 'most servers: just bump' + 21 doc gaps#1910
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docs: reframe migration guide as 'most servers: just bump' + 21 doc gaps#1910felixweinberger wants to merge 1 commit intomainfrom
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Reframe both migration.md and migration-SKILL.md to lead with the backwards-compatible upgrade path: bump @modelcontextprotocol/sdk to ^2 and let deprecation warnings guide further migration. New content: - Prerequisites section: zod ^4.2.0 runtime-crash callout, moduleResolution bundler/nodenext requirement, bun file: cache note - "core is bundled" wording (never appears in node_modules) - Zod schemas no longer exported → parseJSONRPCMessage / specTypeSchema / isSpecType mapping; /zod-schemas escape hatch - Custom-method handler registration + spec-method extension warning - Transitive-v1-dependency type-mix guidance - OAuthError.errorCode → .code rename Mapping-table rows added: ResourceTemplateType, ZodRawShapeCompat, RequestInfo, FetchLike, OAuthProtectedResourceMetadata, server/auth/errors.js, server/express.js, inMemory.js, roots/list, completion/complete, resources/subscribe|unsubscribe|templates/list, tasks/get|result, notifications/roots/list_changed, notifications/elicitation/complete, callToolStream. Absorbs the doc edits from #1834 (SSE before/after example, InMemoryTransport export location, validator import simplification, method-string and callToolStream additions).
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Part of the v2 backwards-compatibility series — see reviewer guide.
Migration guide currently reads as a full rewrite checklist. With the BC layer, most servers just bump and follow deprecation warnings. This reframes the top + fills 21 specific gaps found during real-repo testing.
Motivation and Context
Migration guide currently reads as a full rewrite checklist. With the BC layer, most servers just bump and follow deprecation warnings. This reframes the top + fills 21 specific gaps found during real-repo testing.
v1 vs v2 pattern & evidence
v1 pattern:
v2-native:
Evidence: 21 doc gaps catalogued from real-repo migration friction.
How Has This Been Tested?
v2-bc-integrationvalidation branchpnpm typecheck:all && pnpm lint:all && pnpm test:allgreenBreaking Changes
None — additive
@deprecatedshim. Removed in v3.Types of changes
Checklist
Additional context
Stacks on: none