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opencode v2 mirror
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TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112import { Effect } from "effect"import { LLMEvent, type ToolCallPart, ToolFailure, ToolOutput, ToolResultValue, type ToolOutput as ToolOutputType, type ToolResultValue as ToolResultValueType,} from "./schema/index.js"import { type AnyTool, type Tools } from "./tool.js"
export interface ToolSettlement { readonly result: ToolResultValueType readonly output?: ToolOutputType}
export interface DispatchResult extends ToolSettlement { readonly events: ReadonlyArray<LLMEvent>}
/** Execute one canonical tool call without owning provider IO or continuation. */export const dispatch = (tools: Tools, call: ToolCallPart): Effect.Effect<DispatchResult> => { const name = call.namespace === undefined ? call.name : `${call.namespace}.${call.name}` const tool = tools[name] if (!tool) return Effect.succeed( result(call, { type: "error", value: `No tool named "${name}" is currently available. Please use a tool from the available tool list.`, }), ) if (!tool.execute) return Effect.succeed(result(call, { type: "error", value: `Tool has no execute handler: ${name}` }))
return decodeAndExecute(tool, call).pipe( Effect.map((value) => result(call, value)), Effect.catchTag("Tool.Error", (failure) => Effect.succeed(result(call, { type: "error", value: failure.message }, failure.error)), ), )}
const decodeAndExecute = (tool: AnyTool, call: ToolCallPart): Effect.Effect<ToolSettlement, ToolFailure> => tool._decode(call.input).pipe( Effect.mapError((error) => new ToolFailure({ message: `Invalid tool input: ${error.message}` })), Effect.flatMap((decoded) => tool.execute!(decoded, { id: call.id, name: call.name, namespace: call.namespace, }).pipe( Effect.flatMap((value) => tool._encode(value).pipe( Effect.mapError( (error) => new ToolFailure({ message: `Tool returned an invalid value for its success schema: ${error.message}`, }), ), ), ), Effect.map((encoded) => { if (tool._legacyResult && ToolResultValue.is(encoded)) return { result: encoded, output: ToolOutput.fromResultValue(encoded) } const output = tool._project(decoded, call.id, encoded) const result = ToolOutput.toResultValue(output) return result.type === "error" ? { result } : { result, output } }), ), ), )
const result = (call: ToolCallPart, value: ToolResultValueType | ToolSettlement, error?: unknown): DispatchResult => { const settlement = ToolResultValue.is(value) ? { result: value } : value return { result: settlement.result, output: settlement.output, events: settlement.result.type === "error" ? [ LLMEvent.toolError({ id: call.id, name: call.name, namespace: call.namespace, message: String(settlement.result.value), error, providerMetadata: call.providerMetadata, }), LLMEvent.toolResult({ id: call.id, name: call.name, namespace: call.namespace, result: settlement.result, providerMetadata: call.providerMetadata, }), ] : [ LLMEvent.toolResult({ id: call.id, name: call.name, namespace: call.namespace, result: settlement.result, output: settlement.output, providerMetadata: call.providerMetadata, }), ], }}
export const ToolRuntime = { dispatch } as const