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fix(core): clarify MCP timeout budgets (#35626)

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Aiden Cline 2026-07-06 17:47:20 -05:00 • committed by GitHub
commit bfdbf43ef8
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7 changed files with 120 additions and 25 deletions
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64
packages/core/test/mcp.test.ts
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@ -177,6 +177,70 @@ test("retains output schemas across paginated MCP discovery", async () => {
])
})
test("applies the configured MCP catalog timeout", async () => {
const result = Effect.runPromise(
Effect.scoped(
Effect.gen(function* () {
const connection = yield* MCPClient.connect(
"catalog-timeout",
new ConfigMCP.Local({
type: "local",
command: [process.execPath, path.join(import.meta.dir, "fixture/mcp-timeout.ts")],
environment: { MCP_TIMEOUT_TARGET: "catalog" },
timeout: new ConfigMCP.Timeout({ catalog: 10 }),
}),
import.meta.dir,
)
return yield* connection.tools()
}),
),
)
await expect(result).rejects.toThrow("Request timed out")
})
test("applies the configured MCP execution timeout", async () => {
const result = Effect.runPromise(
Effect.scoped(
Effect.gen(function* () {
const connection = yield* MCPClient.connect(
"execution-timeout",
new ConfigMCP.Local({
type: "local",
command: [process.execPath, path.join(import.meta.dir, "fixture/mcp-timeout.ts")],
timeout: new ConfigMCP.Timeout({ execution: 10 }),
}),
import.meta.dir,
)
return yield* connection.callTool({ name: "slow" })
}),
),
)
await expect(result).rejects.toThrow("Request timed out")
})
test("applies the configured MCP execution timeout to prompts", async () => {
const result = Effect.runPromise(
Effect.scoped(
Effect.gen(function* () {
const connection = yield* MCPClient.connect(
"prompt-timeout",
new ConfigMCP.Local({
type: "local",
command: [process.execPath, path.join(import.meta.dir, "fixture/mcp-timeout.ts")],
timeout: new ConfigMCP.Timeout({ execution: 10 }),
}),
import.meta.dir,
)
return yield* connection.prompt({ name: "slow" })
}),
),
)
await expect(result).rejects.toThrow("Request timed out")
})
it.effect("advertises MCP output schemas to Code Mode", () =>
Effect.gen(function* () {
const registry = yield* ToolRegistry.Service