File size: 5,986 Bytes
3e05655 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | export * as Tool from "./tool"
import { ToolDefinition, ToolFailure, ToolOutput, type ToolCall } from "@opencode-ai/llm"
import { Effect, JsonSchema, Schema } from "effect"
import type { AgentV2 } from "../agent"
import type { SessionMessage } from "../session/message"
import type { SessionSchema } from "../session/schema"
export interface Context {
readonly sessionID: SessionSchema.ID
readonly agent: AgentV2.ID
readonly assistantMessageID: SessionMessage.ID
readonly toolCallID: string
}
export type SchemaType<A> = Schema.Codec<A, any, never, never>
declare const TypeId: unique symbol
export interface Definition<Input extends SchemaType<any>, Output extends SchemaType<any>> {
readonly [TypeId]: {
readonly _Input: Input
readonly _Output: Output
}
}
export type AnyTool = Definition<any, any>
export const Failure = ToolFailure
export type Failure = ToolFailure
export class RegistrationError extends Schema.TaggedErrorClass<RegistrationError>()("Tool.RegistrationError", {
name: Schema.String,
message: Schema.String,
}) {}
export type Content =
| { readonly type: "text"; readonly text: string }
| { readonly type: "file"; readonly data: string; readonly mime: string; readonly name?: string }
type Config<
Input extends SchemaType<any>,
Output extends SchemaType<any>,
Structured extends SchemaType<any> = Output,
> = {
readonly description: string
readonly input: Input
readonly output: Output
readonly structured?: Structured
readonly toStructuredOutput?: (input: {
readonly input: Schema.Schema.Type<Input>
readonly output: Output["Encoded"]
}) => Schema.Schema.Type<Structured>
readonly execute: (
input: Schema.Schema.Type<Input>,
context: Context,
) => Effect.Effect<Schema.Schema.Type<Output>, ToolFailure>
readonly toModelOutput?: (input: {
readonly input: Schema.Schema.Type<Input>
readonly output: Output["Encoded"]
}) => ReadonlyArray<Content>
}
type Runtime = {
readonly permission?: string
readonly definition: (name: string) => ToolDefinition
readonly settle: (call: ToolCall, context: Context) => Effect.Effect<ToolOutput, ToolFailure>
}
const runtimes = new WeakMap<AnyTool, Runtime>()
export function make<
Input extends SchemaType<any>,
Output extends SchemaType<any>,
Structured extends SchemaType<any> = Output,
>(config: Config<Input, Output, Structured>): Definition<Input, Structured> {
const tool = Object.freeze({}) as Definition<Input, Structured>
const definitions = new Map<string, ToolDefinition>()
runtimes.set(tool, {
definition: (name) => {
const cached = definitions.get(name)
if (cached) return cached
const definition = new ToolDefinition({
name,
description: config.description,
inputSchema: toJsonSchema(config.input),
outputSchema: toJsonSchema(config.structured ?? config.output),
})
definitions.set(name, definition)
return definition
},
settle: (call, context) =>
Schema.decodeUnknownEffect(config.input)(call.input).pipe(
Effect.mapError((error) => new ToolFailure({ message: `Invalid tool input: ${error.message}` })),
Effect.flatMap((input) =>
config.execute(input, context).pipe(
Effect.flatMap((output) =>
Schema.encodeEffect(config.output)(output).pipe(
Effect.flatMap((output) => {
if (!config.structured || !config.toStructuredOutput)
return Effect.succeed({ output, structured: output })
return Schema.encodeEffect(config.structured)(config.toStructuredOutput({ input, output })).pipe(
Effect.map((structured) => ({ output, structured })),
)
}),
Effect.mapError(
(error) =>
new ToolFailure({
message: `Tool returned an invalid value for its output schema: ${error.message}`,
}),
),
),
),
Effect.map(({ output, structured }) => ({
structured,
content:
config.toModelOutput?.({ input, output }).map((part) =>
part.type === "text"
? { type: "text" as const, text: part.text }
: {
type: "file" as const,
uri: `data:${part.mime};base64,${part.data}`,
mime: part.mime,
name: part.name,
},
) ?? (typeof output === "string" ? [{ type: "text" as const, text: output }] : []),
})),
),
),
),
})
return tool
}
export const validateName = (name: string) =>
/^[A-Za-z][A-Za-z0-9_-]{0,63}$/.test(name)
? Effect.void
: Effect.fail(new RegistrationError({ name, message: `Invalid tool name: ${name}` }))
export const withPermission = <Input extends SchemaType<any>, Output extends SchemaType<any>>(
tool: Definition<Input, Output>,
permission: string,
) => {
const decorated = Object.freeze({}) as Definition<Input, Output>
runtimes.set(decorated, { ...runtimeOf(tool), permission })
return decorated
}
export const permission = (tool: AnyTool, name: string) => runtimeOf(tool).permission ?? name
export const definition = (name: string, tool: AnyTool) => runtimeOf(tool).definition(name)
export const settle = (tool: AnyTool, call: ToolCall, context: Context) => runtimeOf(tool).settle(call, context)
function runtimeOf(tool: AnyTool) {
const runtime = runtimes.get(tool)
if (!runtime) throw new TypeError("Invalid Core Tool value")
return runtime
}
function toJsonSchema(schema: Schema.Top): JsonSchema.JsonSchema {
const document = Schema.toJsonSchemaDocument(schema)
if (Object.keys(document.definitions).length === 0) return document.schema
return { ...document.schema, $defs: document.definitions }
}
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