import type { StandardSchemaV1 } from "@standard-schema/spec";import * as Data from "effect/Data";import * as Effect from "effect/Effect";import * as JSONSchema from "effect/JSONSchema";import { typeSignatureFromSchema } from "./schema-types"; import type { ElicitationRequest, ElicitationResponse, ExecutableTool, OnElicitation, OnToolInteraction, ToolDefinition, ToolDescriptor, ToolElicitationRequest, ToolInput, ToolInteractionDecision, ToolInteractionRequest, ToolInvocationContext, ToolInvoker, ToolMap, ToolMetadata, ToolPath,} from "./types"; type ResolvedTool = { path: ToolPath; tool: ExecutableTool; metadata?: ToolMetadata;}; const asToolPath = (value: string): ToolPath => value as ToolPath; const toError = (cause: unknown): Error => cause instanceof Error ? cause : new Error(String(cause)); const getSchemaValidator = (schema: unknown): | ((value: unknown, options?: StandardSchemaV1.Options) => | StandardSchemaV1.Result<unknown> | Promise<StandardSchemaV1.Result<unknown>>) | null => { if (!schema || (typeof schema !== "object" && typeof schema !== "function")) { return null; } const standard = (schema as { "~standard"?: unknown })["~standard"]; if (!standard || typeof standard !== "object") { return null; } const validate = (standard as { validate?: unknown }).validate; return typeof validate === "function" ? (validate as ( value: unknown, options?: StandardSchemaV1.Options, ) => | StandardSchemaV1.Result<unknown> | Promise<StandardSchemaV1.Result<unknown>>) : null;}; const formatIssuePath = ( path: ReadonlyArray<PropertyKey | StandardSchemaV1.PathSegment> | undefined,): string => { if (!path || path.length === 0) { return "$"; } return path .map((segment) => typeof segment === "object" && segment !== null && "key" in segment ? String(segment.key) : String(segment), ) .join(".");}; const formatIssues = (issues: ReadonlyArray<StandardSchemaV1.Issue>): string => issues .map((issue) => `${formatIssuePath(issue.path)}: ${issue.message}`) .join("; "); const parseInput = (input: { schema: unknown; value: unknown; path: string;}): Effect.Effect<unknown, Error> => { const validate = getSchemaValidator(input.schema); if (!validate) { return Effect.fail( new Error(`Tool ${input.path} has no Standard Schema validator on inputSchema`), ); } return Effect.tryPromise({ try: () => Promise.resolve(validate(input.value)), catch: toError, }).pipe( Effect.flatMap((result) => { if ("issues" in result && result.issues) { return Effect.fail( new Error( `Input validation failed for ${input.path}: ${formatIssues(result.issues)}`, ), ); } return Effect.succeed(result.value); }), );}; const defaultRequiredElicitation = (path: string): ElicitationRequest => ({ mode: "form", message: `Approval required before invoking ${path}`, requestedSchema: { type: "object", properties: {}, additionalProperties: false, },}); const executeDecision: ToolInteractionDecision = { kind: "execute" }; const toElicitationDecision = (input: { metadata?: ToolMetadata; path: string;}): ToolInteractionDecision | null => { if (input.metadata?.elicitation) { return { kind: "elicit", elicitation: input.metadata.elicitation, }; } if (input.metadata?.interaction === "required") { return { kind: "elicit", elicitation: defaultRequiredElicitation(input.path), }; } return null;}; const defaultInteractionDecision = (input: { metadata?: ToolMetadata; path: string;}): ToolInteractionDecision => toElicitationDecision(input) ?? executeDecision; export class ToolInteractionPendingError extends Data.TaggedError( "ToolInteractionPendingError",)<{ readonly path: string; readonly elicitation: ElicitationRequest; readonly interactionId?: string;}> {} export class ToolInteractionDeniedError extends Data.TaggedError( "ToolInteractionDeniedError",)<{ readonly path: string; readonly reason: string;}> {} export const allowAllToolInteractions: OnToolInteraction = () => Effect.succeed(executeDecision); const evaluateInteractionDecision = (input: { path: ToolPath; args: unknown; metadata?: ToolMetadata; sourceKey: string; context?: ToolInvocationContext; onToolInteraction?: OnToolInteraction;}): Effect.Effect<ToolInteractionDecision, unknown> => { const defaultDecision = defaultInteractionDecision({ metadata: input.metadata, path: input.path, }); if (!input.onToolInteraction) { return Effect.succeed(defaultDecision); } const request: ToolInteractionRequest = { path: input.path, sourceKey: input.sourceKey, args: input.args, metadata: input.metadata, context: input.context, defaultElicitation: defaultDecision.kind === "elicit" ? defaultDecision.elicitation : null, }; return input.onToolInteraction(request);}; const isRecord = (value: unknown): value is Record<string, unknown> => typeof value === "object" && value !== null && !Array.isArray(value); const mergeAcceptedElicitationContent = (input: { path: ToolPath; args: unknown; response: ElicitationResponse; inputSchema: unknown;}): Effect.Effect<unknown, Error> => { if (!input.response.content) { return Effect.succeed(input.args); } if (!isRecord(input.args)) { return Effect.fail( new Error( `Tool ${input.path} cannot merge elicitation content into non-object arguments`, ), ); } const merged = { ...input.args, ...input.response.content, }; return parseInput({ schema: input.inputSchema, value: merged, path: input.path, });}; const declineReasonFromResponse = (input: { path: ToolPath; response: ElicitationResponse;}): string => { const reason = input.response.content && typeof input.response.content.reason === "string" && input.response.content.reason.trim().length > 0 ? input.response.content.reason.trim() : null; if (reason) { return reason; } return input.response.action === "cancel" ? `Interaction cancelled for ${input.path}` : `Interaction declined for ${input.path}`;}; const resolveInteractionDecision = (input: { path: ToolPath; args: unknown; inputSchema: unknown; metadata?: ToolMetadata; sourceKey: string; context?: ToolInvocationContext; decision: ToolInteractionDecision; interactionId: string; onElicitation?: OnElicitation;}): Effect.Effect<unknown, ToolInteractionPendingError | ToolInteractionDeniedError | Error> => { if (input.decision.kind === "execute") { return Effect.succeed(input.args); } if (input.decision.kind === "decline") { return Effect.fail( new ToolInteractionDeniedError({ path: input.path, reason: input.decision.reason, }), ); } if (!input.onElicitation) { return Effect.fail( new ToolInteractionPendingError({ path: input.path, elicitation: input.decision.elicitation, interactionId: input.interactionId, }), ); } const elicitationRequest: ToolElicitationRequest = { interactionId: input.interactionId, path: input.path, sourceKey: input.sourceKey, args: input.args, metadata: input.metadata, context: input.context, elicitation: input.decision.elicitation, }; return input.onElicitation(elicitationRequest).pipe( Effect.mapError(toError), Effect.flatMap((response) => { if (response.action !== "accept") { return Effect.fail( new ToolInteractionDeniedError({ path: input.path, reason: declineReasonFromResponse({ path: input.path, response, }), }), ); } return mergeAcceptedElicitationContent({ path: input.path, args: input.args, response, inputSchema: input.inputSchema, }); }), );}; export function wrapTool(input: { tool: ExecutableTool; metadata?: ToolMetadata;}): ToolDefinition { return { tool: input.tool, metadata: input.metadata, };} export const toTool = wrapTool;export const toExecutorTool = wrapTool; const isToolDefinition = (value: ToolInput): value is ToolDefinition => typeof value === "object" && value !== null && "tool" in value; const deriveSchemaValue = (value: unknown): unknown | undefined => { if (value === undefined || value === null) { return undefined; } try { if ( (typeof value === "object" || typeof value === "function") && value !== null && "~standard" in value ) { return JSONSchema.make(value as any); } return value; } catch { return undefined; }}; const inferTypeFromSchemaValue = ( schema: unknown, fallback: string, maxLength: number = 240,): string => typeSignatureFromSchema(schema, fallback, maxLength); export function createToolsFromRecord(input: { tools: Record<string, ExecutableTool>; sourceKey?: string;}): ToolMap { const { tools, sourceKey = "in_memory.tools" } = input; return Object.fromEntries( Object.entries(tools) .sort(([left], [right]) => left.localeCompare(right)) .map(([path, tool]) => [ path, wrapTool({ tool, metadata: { sourceKey }, }), ]), ) as ToolMap;} const resolveToolsFromMap = (input: { tools: ToolMap; sourceKey?: string;}): ResolvedTool[] => { const defaultSourceKey = input.sourceKey ?? "in_memory.tools"; return Object.entries(input.tools) .sort(([left], [right]) => left.localeCompare(right)) .map(([path, value]) => { const entry = isToolDefinition(value) ? value : { tool: value }; const metadata = entry.metadata ? { sourceKey: defaultSourceKey, ...entry.metadata, } : { sourceKey: defaultSourceKey }; return { path: asToolPath(path), tool: entry.tool, metadata, } satisfies ResolvedTool; });}; export function toolDescriptorsFromTools(input: { tools: ToolMap; sourceKey?: string;}): ToolDescriptor[] { const resolvedTools = resolveToolsFromMap({ tools: input.tools, sourceKey: input.sourceKey, }); return resolvedTools.map((entry) => { const metadata = entry.metadata; const definition = entry.tool; const inputSchema = metadata?.inputSchema ?? deriveSchemaValue(definition.inputSchema) ?? deriveSchemaValue(definition.parameters); const outputSchema = metadata?.outputSchema ?? deriveSchemaValue(definition.outputSchema); return { path: entry.path, sourceKey: metadata?.sourceKey ?? "in_memory.tools", description: definition.description, interaction: metadata?.interaction, elicitation: metadata?.elicitation, inputTypePreview: metadata?.inputTypePreview ?? inferTypeFromSchemaValue(inputSchema, "unknown"), outputTypePreview: metadata?.outputTypePreview ?? inferTypeFromSchemaValue(outputSchema, "unknown"), ...(inputSchema !== undefined ? { inputSchema } : {}), ...(outputSchema !== undefined ? { outputSchema } : {}), ...(metadata?.exampleInput !== undefined ? { exampleInput: metadata.exampleInput } : {}), ...(metadata?.exampleOutput !== undefined ? { exampleOutput: metadata.exampleOutput } : {}), ...(metadata?.providerKind ? { providerKind: metadata.providerKind } : {}), ...(metadata?.providerData !== undefined ? { providerData: metadata.providerData } : {}), } satisfies ToolDescriptor; });} const asInteractionIdPart = (value: string): string => value.replace(/[^a-zA-Z0-9._-]/g, "_"); const createInteractionIdFactory = () => { let sequence = 0; return (input: { path: ToolPath; context?: ToolInvocationContext }): string => { sequence += 1; const runId = typeof input.context?.runId === "string" && input.context.runId.length > 0 ? input.context.runId : "run"; const callId = typeof input.context?.callId === "string" && input.context.callId.length > 0 ? input.context.callId : `call_${String(sequence)}`; return `${asInteractionIdPart(runId)}:${asInteractionIdPart(callId)}:${asInteractionIdPart(String(input.path))}:${String(sequence)}`; };}; export const makeToolInvokerFromTools = (input: { tools: ToolMap; sourceKey?: string; onToolInteraction?: OnToolInteraction; onElicitation?: OnElicitation;}): ToolInvoker => { const resolvedTools = resolveToolsFromMap({ tools: input.tools, sourceKey: input.sourceKey, }); const byPath = new Map(resolvedTools.map((entry) => [entry.path as string, entry])); const nextInteractionId = createInteractionIdFactory(); return { invoke: ({ path, args, context }) => Effect.gen(function* () { const entry = byPath.get(path); if (!entry) { return yield* Effect.fail(new Error(`Unknown tool path: ${path}`)); } const parsedInput = yield* parseInput({ schema: entry.tool.inputSchema, value: args,Lines 1–500 of 545. 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import type { StandardSchemaV1 } from "@standard-schema/spec"; import * as Data from "effect/Data"; import * as Effect from "effect/Effect"; import * as JSONSchema from "effect/JSONSchema"; import { typeSignatureFromSchema } from "./schema-types"; import type { ElicitationRequest, ElicitationResponse, ExecutableTool, OnElicitation, OnToolInteraction, ToolDefinition, ToolDescriptor, ToolElicitationRequest, ToolInput, ToolInteractionDecision, ToolInteractionRequest, ToolInvocationContext, ToolInvoker, ToolMap, ToolMetadata, ToolPath, } from "./types"; type ResolvedTool = { path: ToolPath; tool: ExecutableTool; metadata?: ToolMetadata; }; const asToolPath = (value: string): ToolPath => value as ToolPath; const toError = (cause: unknown): Error => cause instanceof Error ? cause : new Error(String(cause)); const getSchemaValidator = (schema: unknown): | ((value: unknown, options?: StandardSchemaV1.Options) => | StandardSchemaV1.Result<unknown> | Promise<StandardSchemaV1.Result<unknown>>) | null => { if (!schema || (typeof schema !== "object" && typeof schema !== "function")) { return null; } const standard = (schema as { "~standard"?: unknown })["~standard"]; if (!standard || typeof standard !== "object") { return null; } const validate = (standard as { validate?: unknown }).validate; return typeof validate === "function" ? (validate as ( value: unknown, options?: StandardSchemaV1.Options, ) => | StandardSchemaV1.Result<unknown> | Promise<StandardSchemaV1.Result<unknown>>) : null; }; const formatIssuePath = ( path: ReadonlyArray<PropertyKey | StandardSchemaV1.PathSegment> | undefined, ): string => { if (!path || path.length === 0) { return "$"; } return path .map((segment) => typeof segment === "object" && segment !== null && "key" in segment ? String(segment.key) : String(segment), ) .join("."); }; const formatIssues = (issues: ReadonlyArray<StandardSchemaV1.Issue>): string => issues .map((issue) => `${formatIssuePath(issue.path)}: ${issue.message}`) .join("; "); const parseInput = (input: { schema: unknown; value: unknown; path: string; }): Effect.Effect<unknown, Error> => { const validate = getSchemaValidator(input.schema); if (!validate) { return Effect.fail( new Error(`Tool ${input.path} has no Standard Schema validator on inputSchema`), ); } return Effect.tryPromise({ try: () => Promise.resolve(validate(input.value)), catch: toError, }).pipe( Effect.flatMap((result) => { if ("issues" in result && result.issues) { return Effect.fail( new Error( `Input validation failed for ${input.path}: ${formatIssues(result.issues)}`, ), ); } return Effect.succeed(result.value); }), ); }; const defaultRequiredElicitation = (path: string): ElicitationRequest => ({ mode: "form", message: `Approval required before invoking ${path}`, requestedSchema: { type: "object", properties: {}, additionalProperties: false, }, }); const executeDecision: ToolInteractionDecision = { kind: "execute" }; const toElicitationDecision = (input: { metadata?: ToolMetadata; path: string; }): ToolInteractionDecision | null => { if (input.metadata?.elicitation) { return { kind: "elicit", elicitation: input.metadata.elicitation, }; } if (input.metadata?.interaction === "required") { return { kind: "elicit", elicitation: defaultRequiredElicitation(input.path), }; } return null; }; const defaultInteractionDecision = (input: { metadata?: ToolMetadata; path: string; }): ToolInteractionDecision => toElicitationDecision(input) ?? executeDecision; export class ToolInteractionPendingError extends Data.TaggedError( "ToolInteractionPendingError", )<{ readonly path: string; readonly elicitation: ElicitationRequest; readonly interactionId?: string; }> {} export class ToolInteractionDeniedError extends Data.TaggedError( "ToolInteractionDeniedError", )<{ readonly path: string; readonly reason: string; }> {} export const allowAllToolInteractions: OnToolInteraction = () => Effect.succeed(executeDecision); const evaluateInteractionDecision = (input: { path: ToolPath; args: unknown; metadata?: ToolMetadata; sourceKey: string; context?: ToolInvocationContext; onToolInteraction?: OnToolInteraction; }): Effect.Effect<ToolInteractionDecision, unknown> => { const defaultDecision = defaultInteractionDecision({ metadata: input.metadata, path: input.path, }); if (!input.onToolInteraction) { return Effect.succeed(defaultDecision); } const request: ToolInteractionRequest = { path: input.path, sourceKey: input.sourceKey, args: input.args, metadata: input.metadata, context: input.context, defaultElicitation: defaultDecision.kind === "elicit" ? defaultDecision.elicitation : null, }; return input.onToolInteraction(request); }; const isRecord = (value: unknown): value is Record<string, unknown> => typeof value === "object" && value !== null && !Array.isArray(value); const mergeAcceptedElicitationContent = (input: { path: ToolPath; args: unknown; response: ElicitationResponse; inputSchema: unknown; }): Effect.Effect<unknown, Error> => { if (!input.response.content) { return Effect.succeed(input.args); } if (!isRecord(input.args)) { return Effect.fail( new Error( `Tool ${input.path} cannot merge elicitation content into non-object arguments`, ), ); } const merged = { ...input.args, ...input.response.content, }; return parseInput({ schema: input.inputSchema, value: merged, path: input.path, }); }; const declineReasonFromResponse = (input: { path: ToolPath; response: ElicitationResponse; }): string => { const reason = input.response.content && typeof input.response.content.reason === "string" && input.response.content.reason.trim().length > 0 ? input.response.content.reason.trim() : null; if (reason) { return reason; } return input.response.action === "cancel" ? `Interaction cancelled for ${input.path}` : `Interaction declined for ${input.path}`; }; const resolveInteractionDecision = (input: { path: ToolPath; args: unknown; inputSchema: unknown; metadata?: ToolMetadata; sourceKey: string; context?: ToolInvocationContext; decision: ToolInteractionDecision; interactionId: string; onElicitation?: OnElicitation; }): Effect.Effect<unknown, ToolInteractionPendingError | ToolInteractionDeniedError | Error> => { if (input.decision.kind === "execute") { return Effect.succeed(input.args); } if (input.decision.kind === "decline") { return Effect.fail( new ToolInteractionDeniedError({ path: input.path, reason: input.decision.reason, }), ); } if (!input.onElicitation) { return Effect.fail( new ToolInteractionPendingError({ path: input.path, elicitation: input.decision.elicitation, interactionId: input.interactionId, }), ); } const elicitationRequest: ToolElicitationRequest = { interactionId: input.interactionId, path: input.path, sourceKey: input.sourceKey, args: input.args, metadata: input.metadata, context: input.context, elicitation: input.decision.elicitation, }; return input.onElicitation(elicitationRequest).pipe( Effect.mapError(toError), Effect.flatMap((response) => { if (response.action !== "accept") { return Effect.fail( new ToolInteractionDeniedError({ path: input.path, reason: declineReasonFromResponse({ path: input.path, response, }), }), ); } return mergeAcceptedElicitationContent({ path: input.path, args: input.args, response, inputSchema: input.inputSchema, }); }), ); }; export function wrapTool(input: { tool: ExecutableTool; metadata?: ToolMetadata; }): ToolDefinition { return { tool: input.tool, metadata: input.metadata, }; } export const toTool = wrapTool; export const toExecutorTool = wrapTool; const isToolDefinition = (value: ToolInput): value is ToolDefinition => typeof value === "object" && value !== null && "tool" in value; const deriveSchemaValue = (value: unknown): unknown | undefined => { if (value === undefined || value === null) { return undefined; } try { if ( (typeof value === "object" || typeof value === "function") && value !== null && "~standard" in value ) { return JSONSchema.make(value as any); } return value; } catch { return undefined; } }; const inferTypeFromSchemaValue = ( schema: unknown, fallback: string, maxLength: number = 240, ): string => typeSignatureFromSchema(schema, fallback, maxLength); export function createToolsFromRecord(input: { tools: Record<string, ExecutableTool>; sourceKey?: string; }): ToolMap { const { tools, sourceKey = "in_memory.tools" } = input; return Object.fromEntries( Object.entries(tools) .sort(([left], [right]) => left.localeCompare(right)) .map(([path, tool]) => [ path, wrapTool({ tool, metadata: { sourceKey }, }), ]), ) as ToolMap; } const resolveToolsFromMap = (input: { tools: ToolMap; sourceKey?: string; }): ResolvedTool[] => { const defaultSourceKey = input.sourceKey ?? "in_memory.tools"; return Object.entries(input.tools) .sort(([left], [right]) => left.localeCompare(right)) .map(([path, value]) => { const entry = isToolDefinition(value) ? value : { tool: value }; const metadata = entry.metadata ? { sourceKey: defaultSourceKey, ...entry.metadata, } : { sourceKey: defaultSourceKey }; return { path: asToolPath(path), tool: entry.tool, metadata, } satisfies ResolvedTool; }); }; export function toolDescriptorsFromTools(input: { tools: ToolMap; sourceKey?: string; }): ToolDescriptor[] { const resolvedTools = resolveToolsFromMap({ tools: input.tools, sourceKey: input.sourceKey, }); return resolvedTools.map((entry) => { const metadata = entry.metadata; const definition = entry.tool; const inputSchema = metadata?.inputSchema ?? deriveSchemaValue(definition.inputSchema) ?? deriveSchemaValue(definition.parameters); const outputSchema = metadata?.outputSchema ?? deriveSchemaValue(definition.outputSchema); return { path: entry.path, sourceKey: metadata?.sourceKey ?? "in_memory.tools", description: definition.description, interaction: metadata?.interaction, elicitation: metadata?.elicitation, inputTypePreview: metadata?.inputTypePreview ?? inferTypeFromSchemaValue(inputSchema, "unknown"), outputTypePreview: metadata?.outputTypePreview ?? inferTypeFromSchemaValue(outputSchema, "unknown"), ...(inputSchema !== undefined ? { inputSchema } : {}), ...(outputSchema !== undefined ? { outputSchema } : {}), ...(metadata?.exampleInput !== undefined ? { exampleInput: metadata.exampleInput } : {}), ...(metadata?.exampleOutput !== undefined ? { exampleOutput: metadata.exampleOutput } : {}), ...(metadata?.providerKind ? { providerKind: metadata.providerKind } : {}), ...(metadata?.providerData !== undefined ? { providerData: metadata.providerData } : {}), } satisfies ToolDescriptor; }); } const asInteractionIdPart = (value: string): string => value.replace(/[^a-zA-Z0-9._-]/g, "_"); const createInteractionIdFactory = () => { let sequence = 0; return (input: { path: ToolPath; context?: ToolInvocationContext }): string => { sequence += 1; const runId = typeof input.context?.runId === "string" && input.context.runId.length > 0 ? input.context.runId : "run"; const callId = typeof input.context?.callId === "string" && input.context.callId.length > 0 ? input.context.callId : `call_${String(sequence)}`; return `${asInteractionIdPart(runId)}:${asInteractionIdPart(callId)}:${asInteractionIdPart(String(input.path))}:${String(sequence)}`; }; }; export const makeToolInvokerFromTools = (input: { tools: ToolMap; sourceKey?: string; onToolInteraction?: OnToolInteraction; onElicitation?: OnElicitation; }): ToolInvoker => { const resolvedTools = resolveToolsFromMap({ tools: input.tools, sourceKey: input.sourceKey, }); const byPath = new Map(resolvedTools.map((entry) => [entry.path as string, entry])); const nextInteractionId = createInteractionIdFactory(); return { invoke: ({ path, args, context }) => Effect.gen(function* () { const entry = byPath.get(path); if (!entry) { return yield* Effect.fail(new Error(`Unknown tool path: ${path}`)); } const parsedInput = yield* parseInput({ schema: entry.tool.inputSchema, value: args,