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fix(sequential-thinking): keep nextThoughtNeeded in inputSchema.required #4669

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fix(sequential-thinking): keep nextThoughtNeeded in inputSchema.required #4669

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16 changes: 8 additions & 8 deletions src/sequentialthinking/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,14 +6,14 @@ import { z } from "zod";
import { SequentialThinkingServer } from './lib.js';

/** Safe boolean coercion that correctly handles string "false" */
const coercedBoolean = z.preprocess((val) => {
if (typeof val === "boolean") return val;
if (typeof val === "string") {
if (val.toLowerCase() === "true") return true;
if (val.toLowerCase() === "false") return false;
}
return val;
}, z.boolean());
// Use a union (rather than z.preprocess) so that zod-to-JSON-Schema conversion
// keeps this field in the inputSchema `required` list. z.preprocess produces a
// schema whose input accepts `unknown`, which the conversion treats as optional
// and drops from `required`, causing a schema/runtime validation mismatch.
const coercedBoolean = z.union([
z.boolean(),
z.enum(["true", "false"]).transform((val) => val === "true"),
]);

const server = new McpServer({
name: "sequential-thinking-server",
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