mirror of
https://github.com/anomalyco/opencode.git
synced 2026-07-23 10:45:33 -04:00
Aiden Cline
831 lines
35 KiB
TypeScript
831 lines
35 KiB
TypeScript
import { Cause, Effect } from "effect"
|
|
import { ToolError, toolError } from "./tool-error.js"
|
|
import {
|
|
decodeInput as decodeToolInput,
|
|
decodeOutput as decodeToolOutput,
|
|
identifierSegment,
|
|
inputProperties,
|
|
inputTypeScript,
|
|
isDefinition as isToolDefinition,
|
|
outputTypeScript,
|
|
type Definition,
|
|
} from "./tool.js"
|
|
import { estimate } from "./token.js"
|
|
import { SandboxDate, SandboxMap, SandboxPromise, SandboxRegExp, SandboxSet } from "./values.js"
|
|
|
|
export type HostTool<R = never> = (...args: Array<unknown>) => Effect.Effect<unknown, unknown, R>
|
|
|
|
export type HostTools<R = never> = {
|
|
[name: string]: HostTool<R> | Definition<R> | HostTools<R>
|
|
}
|
|
|
|
export type Services<Tools> = Tools extends (...args: Array<unknown>) => Effect.Effect<unknown, unknown, infer R>
|
|
? R
|
|
: Tools extends {
|
|
readonly _tag: "CodeModeTool"
|
|
readonly run: (input: unknown) => Effect.Effect<unknown, unknown, infer R>
|
|
}
|
|
? R
|
|
: Tools extends object
|
|
? string extends keyof Tools
|
|
? never
|
|
: Services<Tools[keyof Tools]>
|
|
: never
|
|
|
|
/** Minimal audit record retained for each admitted tool call. */
|
|
export type ToolCall = {
|
|
readonly name: string
|
|
}
|
|
|
|
/** Decoded tool call observed immediately before tool execution. */
|
|
export type ToolCallStarted = {
|
|
readonly index: number
|
|
readonly name: string
|
|
readonly input: unknown
|
|
}
|
|
|
|
/** Completed tool call observed immediately after tool execution settles. */
|
|
export type ToolCallEnded = {
|
|
readonly index: number
|
|
readonly name: string
|
|
readonly input: unknown
|
|
readonly durationMs: number
|
|
readonly outcome: "success" | "failure"
|
|
/** Model-safe failure message; present only when `outcome` is `"failure"`. */
|
|
readonly message?: string
|
|
}
|
|
|
|
/** Non-throwing observation hooks fired around each admitted tool call. */
|
|
export type ToolCallHooks<R = never> = {
|
|
readonly onToolCallStart?: ((call: ToolCallStarted) => Effect.Effect<void, never, R>) | undefined
|
|
readonly onToolCallEnd?: ((call: ToolCallEnded) => Effect.Effect<void, never, R>) | undefined
|
|
}
|
|
|
|
/** Model-visible description of one schema-backed tool. */
|
|
export type ToolDescription = {
|
|
readonly path: string
|
|
readonly description: string
|
|
readonly signature: string
|
|
}
|
|
|
|
export type SafeObject = Record<string, unknown>
|
|
|
|
const reservedNamespace = "$codemode"
|
|
const defaultMaxInlineCatalogTokens = 2_000
|
|
const defaultSearchLimit = 10
|
|
const searchSignature =
|
|
"tools.$codemode.search({ query?: string, namespace?: string, limit?: number }): Promise<{ items: Array<{ path: string; description: string; signature: string }>; total: number }>"
|
|
const toolExpression = (path: string) =>
|
|
"tools" +
|
|
path
|
|
.split(".")
|
|
.map((segment) => (identifierSegment.test(segment) ? `.${segment}` : `[${JSON.stringify(segment)}]`))
|
|
.join("")
|
|
|
|
export class ToolReference {
|
|
constructor(readonly path: ReadonlyArray<string>) {}
|
|
}
|
|
|
|
/**
|
|
* Maximum nesting depth for values crossing a data boundary. Fixed (not a configurable
|
|
* limit) purely because it produces a clearer diagnostic than a native stack-overflow
|
|
* RangeError would.
|
|
*/
|
|
const MAX_VALUE_DEPTH = 32
|
|
|
|
export class ToolRuntimeError extends Error {
|
|
constructor(
|
|
readonly kind:
|
|
| "UnknownTool"
|
|
| "InvalidToolInput"
|
|
| "InvalidToolOutput"
|
|
| "InvalidDataValue"
|
|
| "ToolCallLimitExceeded",
|
|
message: string,
|
|
readonly suggestions: ReadonlyArray<string> = [],
|
|
) {
|
|
super(message)
|
|
this.name = "ToolRuntimeError"
|
|
}
|
|
}
|
|
|
|
const isDefinition = <R>(value: HostTool<R> | Definition<R> | HostTools<R>): value is Definition<R> =>
|
|
isToolDefinition<R>(value)
|
|
|
|
const runHost = <A, E, R>(effect: Effect.Effect<A, E, R>): Effect.Effect<A, ToolError, R> =>
|
|
effect.pipe(
|
|
Effect.catchCause((cause) => {
|
|
if (Cause.hasInterruptsOnly(cause)) return Effect.interrupt
|
|
const error = Cause.squash(cause)
|
|
return Effect.fail(error instanceof ToolError ? error : toolError("Tool execution failed", error))
|
|
}),
|
|
)
|
|
|
|
const blockedMemberNames = new Set(["__proto__", "constructor", "prototype"])
|
|
|
|
export const isBlockedMember = (name: string): boolean => blockedMemberNames.has(name)
|
|
|
|
/**
|
|
* Validates and copies a value against the plain-data contract (depth, circularity, plain
|
|
* objects only, blocked properties, data-only leaves).
|
|
*
|
|
* Two modes share the walk:
|
|
* - **Boundary** (`preserveSandboxValues` false, the default): the host<->sandbox boundary -
|
|
* final results, tool-call arguments, `JSON.stringify`. Sandbox value types serialize
|
|
* exactly as JSON.stringify would: Date -> ISO string (invalid -> null), RegExp/Map/Set -> {}.
|
|
* - **Intra-sandbox checkpoint** (`preserveSandboxValues` true; see `boundedData` in
|
|
* codemode.ts): Date/RegExp/Map/Set instances pass through untouched (treated as leaves,
|
|
* contents not walked), so values flowing through `Object.*` helpers, coercion inputs, and
|
|
* other in-sandbox checkpoints stay fully usable (`.getTime()`, `.has()`, ...).
|
|
*
|
|
* Both modes reject un-awaited promises with an await-hinting diagnostic.
|
|
*/
|
|
export const copyIn = (value: unknown, label: string, preserveSandboxValues = false): unknown =>
|
|
copyBounded(value, label, 0, new Set(), preserveSandboxValues)
|
|
|
|
const copyBounded = (
|
|
value: unknown,
|
|
label: string,
|
|
depth: number,
|
|
seen: Set<object>,
|
|
preserveSandboxValues: boolean,
|
|
): unknown => {
|
|
if (depth > MAX_VALUE_DEPTH) {
|
|
throw new ToolRuntimeError("InvalidDataValue", `${label} exceeds the maximum value depth of ${MAX_VALUE_DEPTH}.`)
|
|
}
|
|
if (
|
|
value === null ||
|
|
value === undefined ||
|
|
typeof value === "string" ||
|
|
typeof value === "boolean" ||
|
|
// NaN/Infinity are allowed to exist as in-sandbox intermediates (matching real JS and a real
|
|
// engine) so defensive guards like `Number.isNaN(x)` / `parseInt(x) || 0` can run. They are
|
|
// normalized to `null` when the value leaves the sandbox - see copyOut - exactly as
|
|
// JSON.stringify already does at any tool boundary.
|
|
typeof value === "number"
|
|
) {
|
|
return value
|
|
}
|
|
|
|
if (typeof value !== "object") {
|
|
throw new ToolRuntimeError("InvalidDataValue", `${label} must contain data only.`)
|
|
}
|
|
|
|
// An un-awaited promise never crosses a data checkpoint as `{}`; the diagnostic tells the
|
|
// model exactly how to fix the program instead.
|
|
if (value instanceof SandboxPromise) {
|
|
throw new ToolRuntimeError(
|
|
"InvalidDataValue",
|
|
`${label} contains an un-awaited Promise; await tool calls (e.g. \`const result = await tools.ns.tool(...)\`) before using their results.`,
|
|
)
|
|
}
|
|
|
|
if (preserveSandboxValues) {
|
|
// Intra-sandbox checkpoints keep sandbox value instances alive as leaves; their contents
|
|
// are never walked here (Map/Set members are validated where mutation happens, and the
|
|
// real boundary still serializes them below).
|
|
if (
|
|
value instanceof SandboxDate ||
|
|
value instanceof SandboxRegExp ||
|
|
value instanceof SandboxMap ||
|
|
value instanceof SandboxSet
|
|
) {
|
|
return value
|
|
}
|
|
// Host instances cannot normally reach an intra-sandbox checkpoint (tool results cross
|
|
// the boundary first), but wrap them defensively rather than degrading to JSON forms.
|
|
if (value instanceof Date) return new SandboxDate(value.getTime())
|
|
if (value instanceof RegExp) return new SandboxRegExp(value.source, value.flags)
|
|
if (value instanceof Map) {
|
|
const wrapped = new SandboxMap()
|
|
for (const [key, item] of value.entries()) {
|
|
wrapped.map.set(copyBounded(key, label, depth + 1, seen, true), copyBounded(item, label, depth + 1, seen, true))
|
|
}
|
|
return wrapped
|
|
}
|
|
if (value instanceof Set) {
|
|
const wrapped = new SandboxSet()
|
|
for (const item of value.values()) wrapped.set.add(copyBounded(item, label, depth + 1, seen, true))
|
|
return wrapped
|
|
}
|
|
}
|
|
|
|
// Sandbox value types (and their host counterparts, which a host tool may legitimately
|
|
// return) serialize exactly as JSON.stringify would at the data boundary: a Date is its
|
|
// toJSON() ISO string (invalid -> null), and RegExp/Map/Set have no JSON form beyond {}.
|
|
if (value instanceof SandboxDate) {
|
|
return Number.isFinite(value.time) ? new Date(value.time).toISOString() : null
|
|
}
|
|
if (value instanceof Date) {
|
|
return Number.isFinite(value.getTime()) ? value.toISOString() : null
|
|
}
|
|
if (
|
|
value instanceof SandboxRegExp ||
|
|
value instanceof SandboxMap ||
|
|
value instanceof SandboxSet ||
|
|
value instanceof RegExp ||
|
|
value instanceof Map ||
|
|
value instanceof Set
|
|
) {
|
|
return Object.create(null) as SafeObject
|
|
}
|
|
|
|
if (seen.has(value)) {
|
|
throw new ToolRuntimeError("InvalidDataValue", `${label} contains a circular value.`)
|
|
}
|
|
|
|
seen.add(value)
|
|
|
|
if (Array.isArray(value)) {
|
|
const copied = value.map((item) => copyBounded(item, label, depth + 1, seen, preserveSandboxValues))
|
|
seen.delete(value)
|
|
return copied
|
|
}
|
|
|
|
const prototype = Object.getPrototypeOf(value)
|
|
if (prototype !== Object.prototype && prototype !== null) {
|
|
throw new ToolRuntimeError("InvalidDataValue", `${label} must contain plain objects only.`)
|
|
}
|
|
|
|
const copied: SafeObject = Object.create(null) as SafeObject
|
|
for (const [key, item] of Object.entries(value)) {
|
|
if (isBlockedMember(key)) {
|
|
throw new ToolRuntimeError("InvalidDataValue", `${label} contains blocked property '${key}'.`)
|
|
}
|
|
copied[key] = copyBounded(item, label, depth + 1, seen, preserveSandboxValues)
|
|
}
|
|
seen.delete(value)
|
|
return copied
|
|
}
|
|
|
|
export const copyOut = (value: unknown, undefinedAsNull = false): unknown => {
|
|
if (value === undefined && undefinedAsNull) return null
|
|
// Normalize non-finite numbers to null as the value crosses out of the sandbox (final return
|
|
// and tool-call arguments both funnel through here), matching JSON semantics - NaN/Infinity
|
|
// have no JSON representation, so JSON.stringify would produce null anyway.
|
|
if (typeof value === "number" && !Number.isFinite(value)) {
|
|
return null
|
|
}
|
|
if (Array.isArray(value)) {
|
|
return value.map((item) => copyOut(item, undefinedAsNull))
|
|
}
|
|
|
|
if (value !== null && typeof value === "object" && !(value instanceof ToolReference)) {
|
|
return Object.fromEntries(Object.entries(value).map(([key, item]) => [key, copyOut(item, undefinedAsNull)]))
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
const definitions = <R>(
|
|
tools: HostTools<R>,
|
|
path: ReadonlyArray<string> = [],
|
|
): Array<{ path: string; definition: Definition<R> }> => {
|
|
const entries: Array<{ path: string; definition: Definition<R> }> = []
|
|
for (const [name, value] of Object.entries(tools)) {
|
|
const next = [...path, name]
|
|
if (isDefinition(value)) entries.push({ path: next.join("."), definition: value })
|
|
else if (typeof value !== "function") entries.push(...definitions(value, next))
|
|
}
|
|
return entries
|
|
}
|
|
|
|
const describeDefinition = <R>(path: string, definition: Definition<R>): ToolDescription => ({
|
|
path,
|
|
description: definition.description,
|
|
signature: `${toolExpression(path)}(input: ${inputTypeScript(definition)}): Promise<${outputTypeScript(definition)}>`,
|
|
})
|
|
|
|
const visibleDefinitions = <R>(tools: HostTools<R>) =>
|
|
definitions(tools).flatMap(({ path, definition }) => {
|
|
const description = describeDefinition(path, definition)
|
|
return [{ path, definition, description }]
|
|
})
|
|
|
|
export const catalog = <R>(tools: HostTools<R>): ReadonlyArray<ToolDescription> =>
|
|
visibleDefinitions(tools).map(({ description }) => description)
|
|
|
|
export type DiscoveryPlan = {
|
|
readonly catalog: ReadonlyArray<ToolDescription>
|
|
readonly instructions: string
|
|
readonly searchIndex: ReadonlyArray<SearchEntry>
|
|
}
|
|
|
|
export type SearchEntry = {
|
|
readonly description: ToolDescription
|
|
/**
|
|
* JSDoc-annotated multiline signature shown on search-result items; the compact
|
|
* single-line form (inline catalog lines) stays in `description.signature`.
|
|
*/
|
|
readonly signature: string
|
|
/** Top-level namespace (first path segment), matched by the search `namespace` option. */
|
|
readonly namespace: string
|
|
/** Lowercased path + description + input property names/descriptions, for substring matching. */
|
|
readonly searchText: string
|
|
}
|
|
|
|
/**
|
|
* Split a query into lowercased search terms. camelCase boundaries are split
|
|
* (`resolveLibrary` -> `resolve library`) and every non-alphanumeric character is a
|
|
* separator, so `resolve-library-id`, `resolveLibraryId`, and `resolve library id` all
|
|
* tokenize alike. Empties and the `*` wildcard are dropped.
|
|
*/
|
|
const tokenize = (query: string): Array<string> =>
|
|
query
|
|
.replace(/([a-z0-9])([A-Z])/g, "$1 $2")
|
|
.toLowerCase()
|
|
.split(/[^a-z0-9]+/)
|
|
.filter((term) => term.length > 0 && term !== "*")
|
|
|
|
/**
|
|
* A term plus its naive singular variants (trailing "s"/"es" stripped), so a plural
|
|
* query term ("issues") still matches indexed text that only carries the singular
|
|
* ("issue"). Matching is one-directional substring containment, so the variants are
|
|
* needed only on the query side; scoring weights are unchanged - each field check
|
|
* passes when ANY form matches.
|
|
*/
|
|
const termForms = (term: string): Array<string> => {
|
|
const forms = [term]
|
|
if (term.endsWith("es") && term.length > 3) forms.push(term.slice(0, -2))
|
|
if (term.endsWith("s") && term.length > 2) forms.push(term.slice(0, -1))
|
|
return forms
|
|
}
|
|
|
|
const firstLine = (text: string) => text.split("\n", 1)[0]!.trim()
|
|
|
|
/** One-line description used on inline catalog lines; the full text stays in search results. */
|
|
const brief = (text: string, max = 120) => {
|
|
const line = firstLine(text)
|
|
return line.length > max ? line.slice(0, max - 1) + "..." : line
|
|
}
|
|
|
|
const catalogLine = (tool: ToolDescription) => {
|
|
const description = brief(tool.description)
|
|
return description === "" ? ` - ${tool.signature}` : ` - ${tool.signature} // ${description}`
|
|
}
|
|
|
|
const toSearchEntry = <R>(path: string, definition: Definition<R>, description: ToolDescription): SearchEntry => ({
|
|
description,
|
|
signature: `${toolExpression(path)}(input: ${inputTypeScript(definition, true)}): Promise<${outputTypeScript(definition, true)}>`,
|
|
namespace: path.split(".", 1)[0]!,
|
|
searchText: [
|
|
path,
|
|
definition.description,
|
|
...inputProperties(definition).flatMap(({ name, description: property }) =>
|
|
property === undefined ? [name] : [name, property],
|
|
),
|
|
]
|
|
.join("\n")
|
|
.toLowerCase(),
|
|
})
|
|
|
|
/** The runtime search index over every described tool. Search is always registered. */
|
|
export const searchIndex = <R>(tools: HostTools<R>): ReadonlyArray<SearchEntry> =>
|
|
visibleDefinitions(tools).map(({ path, definition, description }) => toSearchEntry(path, definition, description))
|
|
|
|
export const assertValidTools = <R>(tools: HostTools<R>): void => {
|
|
if (Object.hasOwn(tools, reservedNamespace)) {
|
|
throw new Error(`Tool namespace '${reservedNamespace}' is reserved for CodeMode discovery tools.`)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Budgeted catalog: every namespace is always listed with its tool count; full call
|
|
* signatures are inlined against the `maxInlineCatalogTokens` budget (estimated tokens,
|
|
* chars/4) round-robin across namespaces - in each round (namespaces alphabetical), every
|
|
* namespace still holding un-inlined tools attempts to place its next-cheapest line, and
|
|
* a namespace whose next line does not fit is done while the others keep going - so every
|
|
* namespace gets some representation before any namespace gets everything. The section
|
|
* states exactly how comprehensive it is - overall (COMPLETE vs PARTIAL) and per
|
|
* namespace. Namespace stub lines are never budgeted: every namespace appears with its
|
|
* tool count even at budget 0.
|
|
*/
|
|
export const discoveryPlan = <R>(
|
|
tools: HostTools<R>,
|
|
maxInlineCatalogTokens = defaultMaxInlineCatalogTokens,
|
|
): DiscoveryPlan => {
|
|
if (!Number.isSafeInteger(maxInlineCatalogTokens) || maxInlineCatalogTokens < 0) {
|
|
throw new RangeError("discovery.maxInlineCatalogTokens must be a non-negative safe integer")
|
|
}
|
|
const visible = visibleDefinitions(tools)
|
|
const described = visible.map(({ description }) => description)
|
|
|
|
const namespaces = new Map<string, Array<ToolDescription>>()
|
|
for (const tool of described) {
|
|
const [namespace = tool.path] = tool.path.split(".")
|
|
const group = namespaces.get(namespace) ?? []
|
|
group.push(tool)
|
|
namespaces.set(namespace, group)
|
|
}
|
|
const ordered = [...namespaces].sort(([left], [right]) => left.localeCompare(right))
|
|
|
|
// Select which signatures fit the budget before emitting, so the list can state
|
|
// exactly how comprehensive it is. Round-robin fairness: in each round (namespaces
|
|
// alphabetical), every namespace still holding un-inlined tools tries to place its
|
|
// next-cheapest line against the shared budget; a namespace whose next line does not
|
|
// fit is done - the others keep going - so every namespace gets some representation
|
|
// before any namespace gets everything.
|
|
const selections = ordered.map(([namespace, group]) => ({
|
|
namespace,
|
|
picked: new Set<ToolDescription>(),
|
|
queue: [...group].sort(
|
|
(left, right) =>
|
|
estimate(catalogLine(left)) - estimate(catalogLine(right)) || left.path.localeCompare(right.path),
|
|
),
|
|
}))
|
|
let used = 0
|
|
let active = selections.filter((selection) => selection.queue.length > 0)
|
|
while (active.length > 0) {
|
|
const stillActive: typeof active = []
|
|
for (const selection of active) {
|
|
const tool = selection.queue[0]!
|
|
const cost = estimate(catalogLine(tool))
|
|
if (used + cost > maxInlineCatalogTokens) continue
|
|
selection.queue.shift()
|
|
selection.picked.add(tool)
|
|
used += cost
|
|
if (selection.queue.length > 0) stillActive.push(selection)
|
|
}
|
|
active = stillActive
|
|
}
|
|
const shown = new Map<string, ReadonlySet<ToolDescription>>(
|
|
selections.map(({ namespace, picked }) => [namespace, picked]),
|
|
)
|
|
const totalShown = selections.reduce((total, { picked }) => total + picked.size, 0)
|
|
const complete = totalShown === described.length
|
|
|
|
const empty = described.length === 0
|
|
|
|
// Section order is deliberate: workflow first (the top is the least likely part of a long
|
|
// description to be truncated or skimmed away), then rules, then syntax, with the budgeted
|
|
// catalog at the bottom. Example call forms use placeholders - never a real or fabricated
|
|
// tool name - and show both dot and bracket notation so non-identifier names are not normalized.
|
|
const intro = [
|
|
"Write a CodeMode program to answer the request. Return code only.",
|
|
empty
|
|
? "Execute JavaScript in a confined runtime."
|
|
: complete
|
|
? "Execute JavaScript in a confined runtime. Inside this program, `tools` contains only the host-provided tools listed below; surrounding agent tools are not available unless listed here."
|
|
: "Execute JavaScript in a confined runtime. Inside this program, `tools` contains only the host-provided tools listed or searchable below; surrounding agent tools are not available unless listed here.",
|
|
...(empty ? [] : ["Do not infer or normalize tool names; use only exact signatures shown below or returned by search."]),
|
|
]
|
|
|
|
// 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.
|
|
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; bracket notation and quotes are part of the path.',
|
|
'3. Parse text results: `const data = typeof res === "string" ? JSON.parse(res) : res` - most tools return JSON as a string.',
|
|
"4. Return only the fields you need: `return { <field>: data.<field> }` - raw payloads get truncated and waste context.",
|
|
]
|
|
: [
|
|
'1. If the exact signature is not listed below, first search: `const { items } = await tools.$codemode.search({ query: "<intent + key nouns>" })`.',
|
|
"2. Read the matches: each item is `{ path, description, signature }` - read the description before using an unfamiliar tool.",
|
|
"3. Call the result's `path` as-is; bracket notation and quotes are part of the path.",
|
|
'4. Parse text results: `const data = typeof res === "string" ? JSON.parse(res) : res` - most tools return JSON as a string.',
|
|
"5. Return only the fields you need: `return { <field>: data.<field> }` - raw payloads get truncated and waste context.",
|
|
]),
|
|
]
|
|
|
|
const rules = empty
|
|
? []
|
|
: [
|
|
"",
|
|
"## Rules",
|
|
"",
|
|
complete
|
|
? "- Only tools listed here are available inside `tools`; tools from the surrounding agent/runtime are not implicitly exposed."
|
|
: "- Only tools listed here or returned by `tools.$codemode.search` are available inside `tools`; tools from the surrounding agent/runtime are not implicitly exposed.",
|
|
"- Filter, aggregate, and transform collections in code - never return them raw or call a tool per item across messages.",
|
|
"- A result typed `Promise<unknown>` has no guaranteed shape - verify what actually came back before relying on its fields.",
|
|
'- Run independent calls in parallel: `await Promise.all(items.map((item) => tools.<namespace>.<tool>(item)))`, or use `tools.<namespace>["tool-name"](item)` when the listed signature uses bracket notation.',
|
|
"- `Object.keys(tools)` lists namespaces; `Object.keys(tools.<namespace>)` lists its tools; `for...in` works on both.",
|
|
...(complete
|
|
? []
|
|
: ['- Browse one namespace: `await tools.$codemode.search({ query: "", namespace: "<name>" })`.']),
|
|
]
|
|
|
|
const syntax = [
|
|
"",
|
|
"## Syntax",
|
|
"",
|
|
"Standard modern JavaScript works: functions/closures, destructuring, template literals, loops, try/catch, spread, optional chaining, the usual Array/String/Object/Math/JSON methods, plus Date, RegExp, Map, Set, and Promise.all/allSettled/race/resolve/reject.",
|
|
"TypeScript type annotations are allowed and stripped before execution (decorators are not supported).",
|
|
"Not supported (each fails with a message naming the alternative): classes, generators, for await...of, .then/.catch/.finally (use await with try/catch).",
|
|
"Dates serialize to ISO strings at data boundaries; Map/Set/RegExp 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)!
|
|
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:", `- ${searchSignature}`)
|
|
}
|
|
}
|
|
|
|
const lines = [...intro, ...workflow, ...rules, ...syntax, ...toolSection]
|
|
return {
|
|
catalog: described,
|
|
instructions: lines.join("\n"),
|
|
searchIndex: visible.map(({ path, definition, description }) => toSearchEntry(path, definition, description)),
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The enumerable names at one node of the host tool tree - namespace names at the root,
|
|
* tool/namespace names below - powering `Object.keys(tools)` and `for...in` over tool
|
|
* references. A callable tool is a leaf and enumerates as `[]` (like `Object.keys` of a
|
|
* function in JS). An unknown path is an `UnknownTool` error pointing at the working
|
|
* discovery idioms, mirroring how calling an unknown tool fails.
|
|
*/
|
|
const namespaceKeys = <R>(
|
|
tools: HostTools<R>,
|
|
path: ReadonlyArray<string>,
|
|
searchEnabled: boolean,
|
|
): ReadonlyArray<string> => {
|
|
// The reserved discovery namespace is virtual (never present in the host tree); enumerate
|
|
// it explicitly so `Object.keys(tools.$codemode)` matches the callable surface.
|
|
if (searchEnabled && path.length === 1 && path[0] === reservedNamespace) return ["search"]
|
|
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 '${path.join(".")}'.`,
|
|
searchEnabled
|
|
? [
|
|
"Object.keys(tools) lists the available namespaces; tools.$codemode.search({ query }) finds described tools.",
|
|
]
|
|
: ["Object.keys(tools) lists the available namespaces."],
|
|
)
|
|
}
|
|
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>,
|
|
searchEnabled: boolean,
|
|
): 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 '${path.join(".")}'.`,
|
|
searchEnabled ? ["Use tools.$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 '${path.join(".")}' is not callable.`)
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
export type ToolRuntime<R = never> = {
|
|
readonly root: ToolReference
|
|
readonly calls: Array<ToolCall>
|
|
readonly invoke: (path: ReadonlyArray<string>, args: Array<unknown>) => Effect.Effect<unknown, unknown, R>
|
|
/** Enumerable namespace/tool names at one node of the host tool tree; see `namespaceKeys`. */
|
|
readonly keys: (path: ReadonlyArray<string>) => ReadonlyArray<string>
|
|
}
|
|
|
|
const failureMessage = (error: unknown): string =>
|
|
error instanceof ToolError || error instanceof ToolRuntimeError ? error.message : "Tool execution failed"
|
|
|
|
export const make = <R>(
|
|
tools: HostTools<R>,
|
|
/** Undefined means unlimited tool calls. */
|
|
maxToolCalls: number | undefined,
|
|
hooks?: ToolCallHooks<R>,
|
|
searchIndex?: ReadonlyArray<SearchEntry>,
|
|
): ToolRuntime<R> => {
|
|
const calls: Array<ToolCall> = []
|
|
const searchEnabled = searchIndex !== undefined
|
|
|
|
// Wraps the settling portion of a tool call so onToolCallEnd observes success and failure
|
|
// symmetrically. Interruption (e.g. the execution timeout) fires neither outcome.
|
|
const observeEnd = <A, E>(effect: Effect.Effect<A, E, R>, call: ToolCallStarted): Effect.Effect<A, E, R> => {
|
|
const onEnd = hooks?.onToolCallEnd
|
|
if (onEnd === undefined) return effect
|
|
const startedAt = Date.now()
|
|
return effect.pipe(
|
|
Effect.tap(() => onEnd({ ...call, durationMs: Date.now() - startedAt, outcome: "success" })),
|
|
Effect.tapError((error) =>
|
|
onEnd({ ...call, durationMs: Date.now() - startedAt, outcome: "failure", message: failureMessage(error) }),
|
|
),
|
|
)
|
|
}
|
|
|
|
const decodeOutput = (value: unknown, name: string) =>
|
|
Effect.try({
|
|
try: () => copyIn(value, `Result from tool '${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 ${maxToolCalls}.`)
|
|
}
|
|
calls.push(call)
|
|
}
|
|
|
|
return {
|
|
root: new ToolReference([]),
|
|
calls,
|
|
keys: (path) => namespaceKeys(tools, path, searchEnabled),
|
|
invoke: (path, args) =>
|
|
Effect.gen(function* () {
|
|
const name = path.join(".")
|
|
const externalArgs = args.map((arg) => copyOut(copyIn(arg, `Arguments for tool '${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))
|
|
if (name === "$codemode.search") {
|
|
if (!searchEnabled) throw new ToolRuntimeError("UnknownTool", `Unknown tool '${name}'.`)
|
|
const input = externalArgs[0]
|
|
if (externalArgs.length !== 1 || input === null || typeof input !== "object" || Array.isArray(input)) {
|
|
throw new ToolRuntimeError(
|
|
"InvalidToolInput",
|
|
"tools.$codemode.search expects { query?: string; namespace?: string; limit?: number }.",
|
|
)
|
|
}
|
|
const request = input as { query?: unknown; namespace?: unknown; limit?: unknown }
|
|
if (request.query !== undefined && typeof request.query !== "string") {
|
|
throw new ToolRuntimeError(
|
|
"InvalidToolInput",
|
|
"tools.$codemode.search query must be a string when provided.",
|
|
)
|
|
}
|
|
if (request.namespace !== undefined && typeof request.namespace !== "string") {
|
|
throw new ToolRuntimeError(
|
|
"InvalidToolInput",
|
|
"tools.$codemode.search namespace must be a string when provided.",
|
|
)
|
|
}
|
|
if (
|
|
request.limit !== undefined &&
|
|
(typeof request.limit !== "number" || !Number.isSafeInteger(request.limit) || request.limit <= 0)
|
|
) {
|
|
throw new ToolRuntimeError(
|
|
"InvalidToolInput",
|
|
"tools.$codemode.search limit must be a positive safe integer when provided.",
|
|
)
|
|
}
|
|
const query = typeof request.query === "string" ? request.query : ""
|
|
const namespace = typeof request.namespace === "string" ? request.namespace : undefined
|
|
const index = yield* recordAndObserve(request)
|
|
return yield* observeEnd(
|
|
Effect.try({
|
|
try: () => {
|
|
const limit = typeof request.limit === "number" ? request.limit : defaultSearchLimit
|
|
const scoped =
|
|
namespace === undefined ? searchIndex : searchIndex.filter((entry) => entry.namespace === namespace)
|
|
// A query that names one tool path exactly (canonical path or rendered
|
|
// JavaScript expression) is a lookup, not a search: return that tool alone.
|
|
const trimmed = query.trim()
|
|
const pathQuery = trimmed.startsWith("tools.") ? trimmed.slice("tools.".length) : trimmed
|
|
const exact =
|
|
pathQuery === ""
|
|
? undefined
|
|
: scoped.find(
|
|
(entry) =>
|
|
entry.description.path === pathQuery || toolExpression(entry.description.path) === trimmed,
|
|
)
|
|
const terms = tokenize(query).map(termForms)
|
|
// Additive field-weighted scoring, summed across terms: exact path or path
|
|
// segment (20) > path substring (8) > description substring (4) > any
|
|
// searchable text, incl. input parameter names/descriptions (2). Each term
|
|
// matches a field when any of its forms (the term or a singular variant)
|
|
// does. An empty query browses everything, alphabetical by path.
|
|
const ranked =
|
|
exact !== undefined
|
|
? [exact]
|
|
: scoped
|
|
.map((entry) => {
|
|
const path = entry.description.path.toLowerCase()
|
|
const description = entry.description.description.toLowerCase()
|
|
const score = terms.reduce(
|
|
(total, forms) =>
|
|
total +
|
|
(forms.some((form) => path === form || path.endsWith(`.${form}`)) ? 20 : 0) +
|
|
(forms.some((form) => path.includes(form)) ? 8 : 0) +
|
|
(forms.some((form) => description.includes(form)) ? 4 : 0) +
|
|
(forms.some((form) => entry.searchText.includes(form)) ? 2 : 0),
|
|
0,
|
|
)
|
|
return { entry, score }
|
|
})
|
|
.filter(({ score }) => terms.length === 0 || score > 0)
|
|
.sort(
|
|
(left, right) =>
|
|
right.score - left.score ||
|
|
left.entry.description.path.localeCompare(right.entry.description.path),
|
|
)
|
|
.map(({ entry }) => entry)
|
|
// Result paths are rendered as JavaScript expressions so each `path` is
|
|
// directly usable as the call site (`await tools.github.list({ ... })` or
|
|
// `await tools.ns["dashed-name"]({ ... })`). The signature is the pretty,
|
|
// JSDoc-annotated form (schema descriptions and constraints ride along as
|
|
// field comments).
|
|
const items = ranked.slice(0, limit).map(({ description, signature }) => ({
|
|
...description,
|
|
path: toolExpression(description.path),
|
|
signature,
|
|
}))
|
|
return copyIn({ items, total: ranked.length }, "Result from tool '$codemode.search'")
|
|
},
|
|
catch: (cause) => cause,
|
|
}),
|
|
{ index, name, input: request },
|
|
)
|
|
}
|
|
|
|
const tool = resolve(tools, path, searchEnabled)
|
|
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"
|