mirror of
https://github.com/anomalyco/opencode.git
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Aiden Cline
817 lines
33 KiB
TypeScript
817 lines
33 KiB
TypeScript
import { Cause, Effect, Schema } from "effect"
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import { ToolError, toolError } from "./tool-error.js"
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import {
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decodeInput as decodeToolInput,
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decodeOutput as decodeToolOutput,
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identifierSegment,
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inputProperties,
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inputTypeScript,
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outputTypeScript,
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} from "./tool-schema.js"
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import { isDefinition as isToolDefinition, type Definition } from "./tool.js"
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import {
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SandboxDate,
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SandboxMap,
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SandboxPromise,
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SandboxRegExp,
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SandboxSet,
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SandboxURL,
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SandboxURLSearchParams,
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} from "./values.js"
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const estimateTokens = (input: string) => Math.max(0, Math.round(input.length / 4))
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export type HostTool<R = never> = (...args: Array<unknown>) => Effect.Effect<unknown, unknown, R>
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export type HostTools<R = never> = {
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[name: string]: HostTool<R> | Definition<R> | HostTools<R>
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}
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export type Services<Tools> = ServicesOf<Tools, []>
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type ServicesOf<Tools, Depth extends ReadonlyArray<unknown>> = Depth["length"] extends 8
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? never
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: Tools extends (...args: Array<unknown>) => Effect.Effect<unknown, unknown, infer R>
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? R
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: Tools extends {
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readonly _tag: "CodeModeTool"
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readonly run: (input: unknown) => Effect.Effect<unknown, unknown, infer R>
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}
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? R
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: Tools extends object
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? string extends keyof Tools
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? ServicesOf<Tools[string], [...Depth, unknown]>
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: ServicesOf<Tools[keyof Tools], [...Depth, unknown]>
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: never
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/** Minimal audit record retained for each admitted tool call. */
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export type ToolCall = {
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readonly name: string
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}
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/** Decoded tool call observed immediately before tool execution. */
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export type ToolCallStarted = {
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readonly index: number
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readonly name: string
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readonly input: unknown
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}
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/** Completed tool call observed immediately after tool execution settles. */
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export type ToolCallEnded = {
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readonly index: number
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readonly name: string
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readonly input: unknown
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readonly durationMs: number
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readonly outcome: "success" | "failure"
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/** Model-safe failure message; present only when `outcome` is `"failure"`. */
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readonly message?: string
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}
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/** Non-throwing observation hooks fired around each admitted tool call. */
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export type ToolCallHooks<R = never> = {
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readonly onToolCallStart?: ((call: ToolCallStarted) => Effect.Effect<void, never, R>) | undefined
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readonly onToolCallEnd?: ((call: ToolCallEnded) => Effect.Effect<void, never, R>) | undefined
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}
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/** Model-visible description of one schema-backed tool. */
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export type ToolDescription = {
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readonly path: string
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readonly description: string
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readonly signature: string
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}
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export type SafeObject = Record<string, unknown>
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const reservedNamespace = "$codemode"
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const defaultCatalogBudget = 2_000
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const defaultSearchLimit = 10
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const PositiveInt = Schema.Int.check(Schema.isGreaterThan(0))
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const NonNegativeInt = Schema.Int.check(Schema.isGreaterThanOrEqualTo(0))
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const SearchInput = Schema.Struct({
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query: Schema.optionalKey(Schema.String),
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namespace: Schema.optionalKey(Schema.String),
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limit: Schema.optionalKey(PositiveInt),
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offset: Schema.optionalKey(NonNegativeInt),
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})
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const SearchItem = Schema.Struct({
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path: Schema.String,
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description: Schema.String,
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signature: Schema.String,
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})
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const SearchOutput = Schema.Struct({
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items: Schema.Array(SearchItem),
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remaining: NonNegativeInt,
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next: Schema.NullOr(Schema.Struct({ offset: NonNegativeInt })),
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})
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const toolExpression = (path: string) =>
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"tools" +
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path
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.split(".")
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.map((segment) => (identifierSegment.test(segment) ? `.${segment}` : `[${JSON.stringify(segment)}]`))
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.join("")
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export class ToolReference {
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constructor(readonly path: ReadonlyArray<string>) {}
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}
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/**
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* Maximum nesting depth for values crossing a data boundary. Fixed (not a configurable
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* limit) purely because it produces a clearer diagnostic than a native stack-overflow
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* RangeError would.
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*/
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const MAX_VALUE_DEPTH = 32
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export class ToolRuntimeError extends Error {
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constructor(
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readonly kind:
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| "UnknownTool"
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| "InvalidToolInput"
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| "InvalidToolOutput"
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| "InvalidDataValue"
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| "ToolCallLimitExceeded",
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message: string,
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readonly suggestions: ReadonlyArray<string> = [],
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) {
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super(message)
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this.name = "ToolRuntimeError"
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}
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}
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const isDefinition = <R>(value: HostTool<R> | Definition<R> | HostTools<R>): value is Definition<R> =>
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isToolDefinition<R>(value)
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const runHost = <A, E, R>(effect: Effect.Effect<A, E, R>): Effect.Effect<A, ToolError, R> =>
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effect.pipe(
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Effect.catchCause((cause) => {
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if (Cause.hasInterruptsOnly(cause)) return Effect.interrupt
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const error = Cause.squash(cause)
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return Effect.fail(error instanceof ToolError ? error : toolError("Tool execution failed", error))
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}),
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)
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const blockedMemberNames = new Set(["__proto__", "constructor", "prototype"])
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export const isBlockedMember = (name: string): boolean => blockedMemberNames.has(name)
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/**
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* Validates and copies a value against the plain-data contract (depth, circularity, plain
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* objects only, blocked properties, data-only leaves).
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*
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* Two modes share the walk:
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* - **Boundary** (`preserveSandboxValues` false, the default): the host<->sandbox boundary -
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* final results, tool-call arguments, `JSON.stringify`. Sandbox value types serialize
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* exactly as JSON.stringify would: Date/URL -> strings, the remaining value types -> {}.
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* - **Intra-sandbox checkpoint** (`preserveSandboxValues` true; see `boundedData` in
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* codemode.ts): standard-library value instances pass through untouched (treated as leaves,
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* contents not walked), so values flowing through `Object.*` helpers, coercion inputs, and
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* other in-sandbox checkpoints stay fully usable (`.getTime()`, `.has()`, ...).
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*
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* Both modes reject un-awaited promises with an await-hinting diagnostic.
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*/
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export const copyIn = (value: unknown, label: string, preserveSandboxValues = false): unknown =>
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copyBounded(value, label, 0, new Set(), preserveSandboxValues)
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const copyBounded = (
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value: unknown,
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label: string,
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depth: number,
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seen: Set<object>,
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preserveSandboxValues: boolean,
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): unknown => {
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if (depth > MAX_VALUE_DEPTH) {
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throw new ToolRuntimeError("InvalidDataValue", `${label} exceeds the maximum value depth of ${MAX_VALUE_DEPTH}.`)
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}
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if (
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value === null ||
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value === undefined ||
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typeof value === "string" ||
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typeof value === "boolean" ||
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// NaN/Infinity are allowed to exist as in-sandbox intermediates (matching real JS and a real
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// engine) so defensive guards like `Number.isNaN(x)` / `parseInt(x) || 0` can run. They are
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// normalized to `null` when the value leaves the sandbox - see copyOut - exactly as
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// JSON.stringify already does at any tool boundary.
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typeof value === "number"
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) {
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return value
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}
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if (typeof value !== "object") {
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throw new ToolRuntimeError("InvalidDataValue", `${label} must contain data only.`)
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}
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// An un-awaited promise never crosses a data checkpoint as `{}`; the diagnostic tells the
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// model exactly how to fix the program instead.
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if (value instanceof SandboxPromise) {
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throw new ToolRuntimeError(
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"InvalidDataValue",
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`${label} contains an un-awaited Promise; await tool calls (e.g. \`const result = await tools.ns.tool(...)\`) before using their results.`,
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)
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}
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if (preserveSandboxValues) {
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// Intra-sandbox checkpoints keep sandbox value instances alive as leaves; their contents
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// are never walked here (Map/Set members are validated where mutation happens, and the
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// real boundary still serializes them below).
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if (
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value instanceof SandboxDate ||
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value instanceof SandboxRegExp ||
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value instanceof SandboxMap ||
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value instanceof SandboxSet ||
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value instanceof SandboxURL ||
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value instanceof SandboxURLSearchParams
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) {
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return value
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}
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// Host instances cannot normally reach an intra-sandbox checkpoint (tool results cross
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// the boundary first), but wrap them defensively rather than degrading to JSON forms.
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if (value instanceof Date) return new SandboxDate(value.getTime())
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if (value instanceof RegExp) return new SandboxRegExp(value.source, value.flags)
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if (value instanceof Map) {
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const wrapped = new SandboxMap()
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for (const [key, item] of value.entries()) {
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wrapped.map.set(copyBounded(key, label, depth + 1, seen, true), copyBounded(item, label, depth + 1, seen, true))
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}
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return wrapped
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}
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if (value instanceof Set) {
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const wrapped = new SandboxSet()
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for (const item of value.values()) wrapped.set.add(copyBounded(item, label, depth + 1, seen, true))
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return wrapped
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}
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if (value instanceof URL) return new SandboxURL(new URL(value.href))
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if (value instanceof URLSearchParams) return new SandboxURLSearchParams(new URLSearchParams(value))
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}
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// Sandbox value types (and their host counterparts, which a host tool may legitimately
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// return) serialize exactly as JSON.stringify would at the data boundary: Date/URL use
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// toJSON(), while RegExp/Map/Set/URLSearchParams have no JSON form beyond {}.
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if (value instanceof SandboxDate) {
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return Number.isFinite(value.time) ? new Date(value.time).toISOString() : null
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}
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if (value instanceof Date) {
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return Number.isFinite(value.getTime()) ? value.toISOString() : null
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}
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if (value instanceof SandboxURL) return value.url.href
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if (value instanceof URL) return value.href
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if (
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value instanceof SandboxRegExp ||
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value instanceof SandboxMap ||
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value instanceof SandboxSet ||
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value instanceof SandboxURLSearchParams ||
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value instanceof RegExp ||
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value instanceof Map ||
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value instanceof Set ||
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value instanceof URLSearchParams
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) {
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return Object.create(null) as SafeObject
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}
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if (seen.has(value)) {
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throw new ToolRuntimeError("InvalidDataValue", `${label} contains a circular value.`)
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}
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seen.add(value)
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if (Array.isArray(value)) {
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const copied = value.map((item) => copyBounded(item, label, depth + 1, seen, preserveSandboxValues))
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if (preserveSandboxValues) {
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// Array metadata is not serialized, but intra-sandbox copies must retain it.
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for (const [key, item] of Object.entries(value)) {
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if (Object.hasOwn(copied, key)) continue
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if (isBlockedMember(key)) {
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throw new ToolRuntimeError("InvalidDataValue", `${label} contains blocked property '${key}'.`)
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}
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Reflect.set(copied, key, copyBounded(item, label, depth + 1, seen, true))
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}
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}
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seen.delete(value)
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return copied
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}
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const prototype = Object.getPrototypeOf(value)
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if (prototype !== Object.prototype && prototype !== null) {
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throw new ToolRuntimeError("InvalidDataValue", `${label} must contain plain objects only.`)
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}
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const copied: SafeObject = Object.create(null) as SafeObject
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for (const [key, item] of Object.entries(value)) {
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if (isBlockedMember(key)) {
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throw new ToolRuntimeError("InvalidDataValue", `${label} contains blocked property '${key}'.`)
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}
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copied[key] = copyBounded(item, label, depth + 1, seen, preserveSandboxValues)
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}
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seen.delete(value)
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return copied
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}
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export const copyOut = (value: unknown, undefinedAsNull = false): unknown => {
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if (value === undefined && undefinedAsNull) return null
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// Normalize non-finite numbers to null as the value crosses out of the sandbox (final return
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// and tool-call arguments both funnel through here), matching JSON semantics - NaN/Infinity
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// have no JSON representation, so JSON.stringify would produce null anyway.
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if (typeof value === "number" && !Number.isFinite(value)) {
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return null
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}
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if (Array.isArray(value)) {
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return value.map((item) => copyOut(item, undefinedAsNull))
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}
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if (value !== null && typeof value === "object" && !(value instanceof ToolReference)) {
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return Object.fromEntries(Object.entries(value).map(([key, item]) => [key, copyOut(item, undefinedAsNull)]))
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}
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return value
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}
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const definitions = <R>(
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tools: HostTools<R>,
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path: ReadonlyArray<string> = [],
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): Array<{ path: string; definition: Definition<R> }> => {
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const entries: Array<{ path: string; definition: Definition<R> }> = []
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for (const [name, value] of Object.entries(tools)) {
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const next = [...path, name]
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if (isDefinition(value)) entries.push({ path: next.join("."), definition: value })
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else if (typeof value !== "function") entries.push(...definitions(value, next))
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}
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return entries
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}
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const describeDefinition = <R>(path: string, definition: Definition<R>): ToolDescription => ({
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path,
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description: definition.description,
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signature: `${toolExpression(path)}(input: ${inputTypeScript(definition, true)}): Promise<${outputTypeScript(definition, true)}>`,
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})
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const visibleDefinitions = <R>(tools: HostTools<R>) =>
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definitions(tools).map(({ path, definition }) => ({
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path,
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definition,
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description: describeDefinition(path, definition),
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}))
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export const catalog = <R>(tools: HostTools<R>): ReadonlyArray<ToolDescription> =>
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visibleDefinitions(tools).map(({ description }) => description)
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export type DiscoveryPlan = {
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readonly catalog: ReadonlyArray<ToolDescription>
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readonly instructions: string
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readonly searchIndex: ReadonlyArray<SearchEntry>
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}
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export type SearchEntry = {
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readonly description: ToolDescription
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/** Top-level namespace (first path segment), matched by the search `namespace` option. */
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readonly namespace: string
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/** Lowercased path + description + input property names/descriptions, for substring matching. */
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readonly searchText: string
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}
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/**
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* Split a query into lowercased search terms. camelCase boundaries are split
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* (`resolveLibrary` -> `resolve library`) and every non-alphanumeric character is a
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* separator, so `resolve-library-id`, `resolveLibraryId`, and `resolve library id` all
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* tokenize alike. Empties and the `*` wildcard are dropped.
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*/
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const tokenize = (query: string): Array<string> =>
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query
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.replace(/([a-z0-9])([A-Z])/g, "$1 $2")
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.toLowerCase()
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.split(/[^a-z0-9]+/)
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.filter((term) => term.length > 0 && term !== "*")
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/**
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* A term plus its naive singular variants (trailing "s"/"es" stripped), so a plural
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* query term ("issues") still matches indexed text that only carries the singular
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* ("issue"). Matching is one-directional substring containment, so the variants are
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* needed only on the query side; scoring weights are unchanged - each field check
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* passes when ANY form matches.
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*/
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const termForms = (term: string): Array<string> => {
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const forms = [term]
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if (term.endsWith("es") && term.length > 3) forms.push(term.slice(0, -2))
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if (term.endsWith("s") && term.length > 2) forms.push(term.slice(0, -1))
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return forms
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}
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const makeSearchTool = (searchIndex: ReadonlyArray<SearchEntry>): Definition => ({
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_tag: "CodeModeTool",
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description: "Search available Code Mode tools",
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input: SearchInput,
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output: SearchOutput,
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run: (input) =>
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Effect.sync(() => {
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const request = input as typeof SearchInput.Type
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const query = request.query ?? ""
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const offset = request.offset ?? 0
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const scoped =
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request.namespace === undefined
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? searchIndex
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: searchIndex.filter((entry) => entry.namespace === request.namespace)
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// A query that names one tool path exactly (canonical path or rendered JavaScript
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// expression) is a lookup, not a search: return that tool alone.
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const trimmed = query.trim()
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const pathQuery = trimmed.startsWith("tools.") ? trimmed.slice("tools.".length) : trimmed
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const exact =
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pathQuery === ""
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? undefined
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: scoped.find(
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(entry) => entry.description.path === pathQuery || toolExpression(entry.description.path) === trimmed,
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)
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const terms = tokenize(query).map(termForms)
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// Additive field-weighted scoring, summed across terms: exact path or path segment
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// (20) > path substring (8) > description substring (4) > any searchable text,
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// including input parameter names and descriptions (2).
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const ranked =
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exact !== undefined
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? [exact]
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: scoped
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.map((entry) => {
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const path = entry.description.path.toLowerCase()
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const description = entry.description.description.toLowerCase()
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const score = terms.reduce(
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(total, forms) =>
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total +
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(forms.some((form) => path === form || path.endsWith(`.${form}`)) ? 20 : 0) +
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(forms.some((form) => path.includes(form)) ? 8 : 0) +
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(forms.some((form) => description.includes(form)) ? 4 : 0) +
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(forms.some((form) => entry.searchText.includes(form)) ? 2 : 0),
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0,
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)
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return { entry, score }
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})
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.filter(({ score }) => terms.length === 0 || score > 0)
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.sort(
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(left, right) =>
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right.score - left.score || left.entry.description.path.localeCompare(right.entry.description.path),
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)
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.map(({ entry }) => entry)
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const items = ranked.slice(offset, offset + (request.limit ?? defaultSearchLimit)).map(({ description }) => ({
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...description,
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path: toolExpression(description.path),
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}))
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const remaining = Math.max(0, ranked.length - offset - items.length)
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return {
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items,
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remaining,
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next: remaining > 0 ? { offset: offset + items.length } : null,
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}
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}),
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})
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const searchDescription = describeDefinition(`${reservedNamespace}.search`, makeSearchTool([]))
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const catalogLine = (tool: ToolDescription) => {
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// Keep the tool description concise; the full schema documentation remains in the signature.
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const line = tool.description.split("\n", 1)[0]!.trim()
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const description = line.length > 120 ? line.slice(0, 119) + "..." : line
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return description === "" ? ` - ${tool.signature}` : ` - ${tool.signature} // ${description}`
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}
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const toSearchEntry = <R>(path: string, definition: Definition<R>, description: ToolDescription): SearchEntry => ({
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description,
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namespace: path.split(".", 1)[0]!,
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searchText: [
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path,
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definition.description,
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...inputProperties(definition).flatMap(({ name, description: property }) =>
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property === undefined ? [name] : [name, property],
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),
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]
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.join("\n")
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.toLowerCase(),
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})
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/** The runtime search index over every described tool. Search is always registered. */
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export const searchIndex = <R>(tools: HostTools<R>): ReadonlyArray<SearchEntry> =>
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visibleDefinitions(tools).map(({ path, definition, description }) => toSearchEntry(path, definition, description))
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export const assertValidTools = <R>(tools: HostTools<R>): void => {
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if (Object.hasOwn(tools, reservedNamespace)) {
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throw new Error(`Tool namespace '${reservedNamespace}' is reserved for CodeMode discovery tools.`)
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}
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}
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/**
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* Budgeted catalog: every namespace is always listed with its tool count; full call
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* signatures are inlined against the `catalogBudget` (estimated tokens,
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* chars/4) round-robin across namespaces - in each round (namespaces alphabetical), every
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* namespace still holding un-inlined tools attempts to place its next-cheapest line, and
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* a namespace whose next line does not fit is done while the others keep going - so every
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* namespace gets some representation before any namespace gets everything. The section
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* states exactly how comprehensive it is - overall (COMPLETE vs PARTIAL) and per
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* namespace. Namespace stub lines are never budgeted: every namespace appears with its
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* tool count even at budget 0.
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*/
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export const prepare = <R>(tools: HostTools<R>, catalogBudget = defaultCatalogBudget): DiscoveryPlan => {
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if (!Number.isSafeInteger(catalogBudget) || catalogBudget < 0) {
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throw new RangeError("discovery.catalogBudget must be a non-negative safe integer")
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}
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const visible = visibleDefinitions(tools)
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const described = visible.map(({ description }) => description)
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const namespaces = new Map<string, Array<ToolDescription>>()
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for (const tool of described) {
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const [namespace = tool.path] = tool.path.split(".")
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const group = namespaces.get(namespace) ?? []
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group.push(tool)
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namespaces.set(namespace, group)
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}
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const ordered = [...namespaces].sort(([left], [right]) => left.localeCompare(right))
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// Select which signatures fit the budget before emitting, so the list can state
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// exactly how comprehensive it is. Round-robin fairness: in each round (namespaces
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// alphabetical), every namespace still holding un-inlined tools tries to place its
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// next-cheapest line against the shared budget; a namespace whose next line does not
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// fit is done - the others keep going - so every namespace gets some representation
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// before any namespace gets everything.
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const selections = ordered.map(([namespace, group]) => ({
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namespace,
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picked: new Set<ToolDescription>(),
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queue: [...group].sort(
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(left, right) =>
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estimateTokens(catalogLine(left)) - estimateTokens(catalogLine(right)) || left.path.localeCompare(right.path),
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),
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}))
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let used = 0
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let active = selections.filter((selection) => selection.queue.length > 0)
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while (active.length > 0) {
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const stillActive: typeof active = []
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for (const selection of active) {
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const tool = selection.queue[0]!
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const cost = estimateTokens(catalogLine(tool))
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if (used + cost > catalogBudget) continue
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selection.queue.shift()
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selection.picked.add(tool)
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used += cost
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if (selection.queue.length > 0) stillActive.push(selection)
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}
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active = stillActive
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}
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const shown = new Map<string, ReadonlySet<ToolDescription>>(
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selections.map(({ namespace, picked }) => [namespace, picked]),
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)
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const totalShown = selections.reduce((total, { picked }) => total + picked.size, 0)
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const complete = totalShown === described.length
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const empty = described.length === 0
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|
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// Section order is deliberate: workflow first (the top is the least likely part of a long
|
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// description to be truncated or skimmed away), then rules, then syntax, with the budgeted
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// catalog at the bottom. Example call forms use placeholders - never a real or fabricated
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// tool name - and show both dot and bracket notation so non-identifier names are not normalized.
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const intro = [
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empty
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? "This is a restricted JavaScript language for calling tools, not a general-purpose runtime."
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: complete
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? "This is a restricted JavaScript language for calling tools, not a general-purpose runtime. Inside the confined interpreter, `tools` contains the Code Mode tools listed below and internal runtime tools; surrounding agent tools are not available."
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: "This is a restricted JavaScript language for calling tools, not a general-purpose runtime. Inside the confined interpreter, `tools` contains the Code Mode tools listed or searchable below and internal runtime tools; surrounding agent tools are not available.",
|
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...(empty
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? []
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: ["Do not infer or normalize tool names; use only exact signatures shown below or returned by search."]),
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|
]
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|
|
|
// The search step exists only when search is advertised (PARTIAL catalog); a COMPLETE
|
|
// catalog already shows every signature, so step 1 picks from the list instead.
|
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const workflow = empty
|
|
? []
|
|
: [
|
|
"",
|
|
"## Workflow",
|
|
"",
|
|
...(complete
|
|
? [
|
|
"1. Pick a tool from the list under `## Available tools` - each line is the exact call signature; use it as-is rather than guessing segments.",
|
|
"2. Call it using the exact signature shown: `const result = await tools.<namespace>.<tool>(input)`; bracket notation and quotes are part of the path.",
|
|
"3. Return only the fields you need from structured results; narrow unknown results before reading fields, and avoid returning large raw payloads.",
|
|
]
|
|
: [
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|
'1. If needed, discover tools: `return await tools.$codemode.search({ query: "<intent + key nouns>" })`.',
|
|
"2. In the next execution, copy a returned path exactly, call it, and return only the needed fields.",
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|
]),
|
|
]
|
|
|
|
const rules = empty
|
|
? []
|
|
: [
|
|
"",
|
|
"## Rules",
|
|
"",
|
|
complete
|
|
? "- Only Code Mode tools listed here and internal runtime tools are available; surrounding agent tools are not implicitly exposed."
|
|
: "- Only Code Mode tools listed here or returned by `tools.$codemode.search` and internal runtime tools are available; surrounding agent tools are not implicitly exposed.",
|
|
"- Filter, aggregate, and transform collections in code - never return them raw or call a tool per item across messages.",
|
|
"- A result typed `Promise<unknown>` may be structured data or text. Before reading fields, check that it is a non-null object and not an array; otherwise handle the returned text or primitive directly.",
|
|
'- Run independent calls in parallel: `await Promise.all(items.map((item) => tools.<namespace>.<tool>(item)))`, or use `tools.<namespace>["tool-name"](item)` when the listed signature uses bracket notation.',
|
|
"- `Object.keys(tools)` lists namespaces; `Object.keys(tools.<namespace>)` lists its tools; `for...in` works on both.",
|
|
...(complete
|
|
? []
|
|
: [
|
|
'- Browse one namespace: `await tools.$codemode.search({ query: "", namespace: "<name>" })`.',
|
|
"- If search returns `next`, repeat the same search with `offset: next.offset`.",
|
|
]),
|
|
]
|
|
|
|
const language = [
|
|
"",
|
|
"## Language",
|
|
"",
|
|
"Use common JavaScript data operations, functions, control flow, selected standard-library methods, and awaited tool calls. Built-ins include Date, RegExp, Map, Set, URL, URLSearchParams, and URI encoding helpers.",
|
|
"Modules/imports, classes, generators, timers, fetch, eval, prototype access, unlisted methods, and promise chaining are unavailable. Use Code Mode tools for external operations. Use await with try/catch.",
|
|
"Dates and URLs serialize to strings at data boundaries; Map/Set/RegExp/URLSearchParams serialize to `{}`.",
|
|
]
|
|
|
|
const toolSection: Array<string> = [""]
|
|
if (empty) {
|
|
toolSection.push("## Available tools", "", "No tools are currently available.")
|
|
} else {
|
|
toolSection.push(
|
|
complete
|
|
? "## Available tools (COMPLETE list - every tool is shown below with its full call signature)"
|
|
: `## Available tools (PARTIAL - ${totalShown} of ${described.length} shown; find the rest with tools.$codemode.search)`,
|
|
"",
|
|
)
|
|
for (const [namespace, group] of ordered) {
|
|
const picked = shown.get(namespace)!
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|
const count = `${group.length} tool${group.length === 1 ? "" : "s"}`
|
|
// Annotate only when a namespace is not fully shown, so a comprehensive
|
|
// namespace reads cleanly and a truncated one is unambiguous.
|
|
const label =
|
|
picked.size === group.length
|
|
? count
|
|
: picked.size === 0
|
|
? `${count}, none shown`
|
|
: `${count}, ${picked.size} shown`
|
|
toolSection.push(`- ${namespace} (${label})`)
|
|
for (const tool of group) if (picked.has(tool)) toolSection.push(catalogLine(tool))
|
|
}
|
|
if (!complete) {
|
|
toolSection.push("", "Search returns complete callable signatures:", `- ${searchDescription.signature}`)
|
|
}
|
|
}
|
|
|
|
const lines = [...intro, ...workflow, ...rules, ...language, ...toolSection]
|
|
return {
|
|
catalog: described,
|
|
instructions: lines.join("\n"),
|
|
searchIndex: visible.map(({ path, definition, description }) => toSearchEntry(path, definition, description)),
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The enumerable names at one node of the callable tool tree - namespace names at the root,
|
|
* tool/namespace names below - powering `Object.keys(tools)` and `for...in` over tool
|
|
* references. A callable tool is a leaf and enumerates as `[]` (like `Object.keys` of a
|
|
* function in JS). An unknown path is an `UnknownTool` error pointing at the working
|
|
* discovery idioms, mirroring how calling an unknown tool fails.
|
|
*/
|
|
const namespaceKeys = <R>(tools: HostTools<R>, path: ReadonlyArray<string>): ReadonlyArray<string> => {
|
|
let value: HostTool<R> | Definition<R> | HostTools<R> = tools
|
|
for (const segment of path) {
|
|
if (
|
|
isBlockedMember(segment) ||
|
|
typeof value === "function" ||
|
|
isDefinition(value) ||
|
|
!Object.hasOwn(value, segment)
|
|
) {
|
|
throw new ToolRuntimeError("UnknownTool", `Unknown tool namespace '${path.join(".")}'.`, [
|
|
"Object.keys(tools) lists the available namespaces; tools.$codemode.search({ query }) finds described tools.",
|
|
])
|
|
}
|
|
value = value[segment] as HostTool<R> | Definition<R> | HostTools<R>
|
|
}
|
|
if (typeof value === "function" || isDefinition(value)) return []
|
|
return Object.keys(value)
|
|
}
|
|
|
|
const resolve = <R>(tools: HostTools<R>, path: ReadonlyArray<string>): HostTool<R> | Definition<R> => {
|
|
let value: HostTool<R> | Definition<R> | HostTools<R> = tools
|
|
|
|
for (const segment of path) {
|
|
if (
|
|
isBlockedMember(segment) ||
|
|
typeof value === "function" ||
|
|
isDefinition(value) ||
|
|
!Object.hasOwn(value, segment)
|
|
) {
|
|
throw new ToolRuntimeError("UnknownTool", `Unknown tool '${path.join(".")}'.`, [
|
|
"Use tools.$codemode.search({ query }) to find available described tools.",
|
|
])
|
|
}
|
|
value = value[segment] as HostTool<R> | Definition<R> | HostTools<R>
|
|
}
|
|
|
|
if (typeof value !== "function" && !isDefinition(value)) {
|
|
throw new ToolRuntimeError("UnknownTool", `Tool '${path.join(".")}' is not callable.`)
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
export type ToolRuntime<R = never> = {
|
|
readonly root: ToolReference
|
|
readonly calls: Array<ToolCall>
|
|
readonly invoke: (path: ReadonlyArray<string>, args: Array<unknown>) => Effect.Effect<unknown, unknown, R>
|
|
/** Enumerable namespace/tool names at one node of the callable tool tree; see `namespaceKeys`. */
|
|
readonly keys: (path: ReadonlyArray<string>) => ReadonlyArray<string>
|
|
}
|
|
|
|
export const make = <R>(
|
|
tools: HostTools<R>,
|
|
/** Undefined means unlimited tool calls. */
|
|
maxToolCalls: number | undefined,
|
|
searchIndex: ReadonlyArray<SearchEntry>,
|
|
hooks?: ToolCallHooks<R>,
|
|
): ToolRuntime<R> => {
|
|
const calls: Array<ToolCall> = []
|
|
const callableTools = {
|
|
...tools,
|
|
[reservedNamespace]: { search: makeSearchTool(searchIndex) },
|
|
}
|
|
|
|
// Wraps the settling portion of a tool call so onToolCallEnd observes success and failure
|
|
// symmetrically. Interruption (e.g. the execution timeout) fires neither outcome.
|
|
const observeEnd = <A, E>(effect: Effect.Effect<A, E, R>, call: ToolCallStarted): Effect.Effect<A, E, R> => {
|
|
const onEnd = hooks?.onToolCallEnd
|
|
if (onEnd === undefined) return effect
|
|
const startedAt = Date.now()
|
|
return effect.pipe(
|
|
Effect.tap(() => onEnd({ ...call, durationMs: Date.now() - startedAt, outcome: "success" })),
|
|
Effect.tapError((error) => {
|
|
const message =
|
|
error instanceof ToolError || error instanceof ToolRuntimeError ? error.message : "Tool execution failed"
|
|
return onEnd({
|
|
...call,
|
|
durationMs: Date.now() - startedAt,
|
|
outcome: "failure",
|
|
message,
|
|
})
|
|
}),
|
|
)
|
|
}
|
|
|
|
const decodeOutput = (value: unknown, name: string) =>
|
|
Effect.try({
|
|
try: () => copyIn(value, `Result from tool '${name}'`),
|
|
catch: () => new ToolRuntimeError("InvalidToolOutput", `Invalid output from tool '${name}'.`),
|
|
})
|
|
|
|
const recordCall = (call: ToolCall): void => {
|
|
if (maxToolCalls !== undefined && calls.length >= maxToolCalls) {
|
|
throw new ToolRuntimeError("ToolCallLimitExceeded", `Execution exceeded its tool-call limit of ${maxToolCalls}.`)
|
|
}
|
|
calls.push(call)
|
|
}
|
|
|
|
return {
|
|
root: new ToolReference([]),
|
|
calls,
|
|
keys: (path) => namespaceKeys(callableTools, path),
|
|
invoke: (path, args) =>
|
|
Effect.gen(function* () {
|
|
const name = path.join(".")
|
|
const externalArgs = args.map((arg) => copyOut(copyIn(arg, `Arguments for tool '${name}'`)))
|
|
const call = { name }
|
|
const recordAndObserve = (input: unknown) =>
|
|
Effect.sync(() => {
|
|
recordCall(call)
|
|
return calls.length - 1
|
|
}).pipe(Effect.tap((index) => hooks?.onToolCallStart?.({ index, name, input }) ?? Effect.void))
|
|
const tool = resolve(callableTools, path)
|
|
let describedInput: unknown
|
|
if (isDefinition(tool)) {
|
|
if (externalArgs.length !== 1)
|
|
throw new ToolRuntimeError("InvalidToolInput", `Tool '${name}' expects exactly one input object.`)
|
|
describedInput = yield* Effect.try({
|
|
try: () => decodeToolInput(tool, externalArgs[0]),
|
|
catch: (cause) =>
|
|
new ToolRuntimeError("InvalidToolInput", `Invalid input for tool '${name}': ${String(cause)}`),
|
|
})
|
|
}
|
|
const input = isDefinition(tool) ? describedInput : externalArgs
|
|
const index = yield* recordAndObserve(input)
|
|
const currentCall = { index, name, input }
|
|
if (isDefinition(tool)) {
|
|
return yield* observeEnd(
|
|
Effect.gen(function* () {
|
|
const raw = yield* runHost(Effect.suspend(() => tool.run(describedInput)))
|
|
const result = yield* Effect.try({
|
|
try: () => decodeToolOutput(tool, raw),
|
|
catch: () => new ToolRuntimeError("InvalidToolOutput", `Invalid output from tool '${name}'.`),
|
|
})
|
|
return yield* decodeOutput(result, name)
|
|
}),
|
|
currentCall,
|
|
)
|
|
}
|
|
return yield* observeEnd(
|
|
Effect.gen(function* () {
|
|
return yield* decodeOutput(yield* runHost(Effect.suspend(() => tool(...externalArgs))), name)
|
|
}),
|
|
currentCall,
|
|
)
|
|
}),
|
|
}
|
|
}
|
|
|
|
export * as ToolRuntime from "./tool-runtime.js"
|