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task.ts
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174 lines (157 loc) · 6.15 KB
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import * as Tool from "./tool"
import DESCRIPTION from "./task.txt"
import { Session } from "@/session/session"
import { SessionID, MessageID } from "../session/schema"
import { MessageV2 } from "../session/message-v2"
import { Agent } from "../agent/agent"
import { deriveSubagentSessionPermission } from "../agent/subagent-permissions"
import type { SessionPrompt } from "../session/prompt"
import { Config } from "@/config/config"
import { Effect, Exit, Schema } from "effect"
import { EffectBridge } from "@/effect/bridge"
export interface TaskPromptOps {
cancel(sessionID: SessionID): Effect.Effect<void>
resolvePromptParts(template: string): Effect.Effect<SessionPrompt.PromptInput["parts"]>
prompt(input: SessionPrompt.PromptInput): Effect.Effect<MessageV2.WithParts>
}
const id = "task"
export const Parameters = Schema.Struct({
description: Schema.String.annotate({ description: "A short (3-5 words) description of the task" }),
prompt: Schema.String.annotate({ description: "The task for the agent to perform" }),
subagent_type: Schema.String.annotate({ description: "The type of specialized agent to use for this task" }),
task_id: Schema.optional(Schema.String).annotate({
description:
"This should only be set if you mean to resume a previous task (you can pass a prior task_id and the task will continue the same subagent session as before instead of creating a fresh one)",
}),
command: Schema.optional(Schema.String).annotate({ description: "The command that triggered this task" }),
})
export const TaskTool = Tool.define(
id,
Effect.gen(function* () {
const agent = yield* Agent.Service
const config = yield* Config.Service
const sessions = yield* Session.Service
const run = Effect.fn("TaskTool.execute")(function* (
params: Schema.Schema.Type<typeof Parameters>,
ctx: Tool.Context,
) {
const cfg = yield* config.get()
if (!ctx.extra?.bypassAgentCheck) {
yield* ctx.ask({
permission: id,
patterns: [params.subagent_type],
always: ["*"],
metadata: {
description: params.description,
subagent_type: params.subagent_type,
},
})
}
const next = yield* agent.get(params.subagent_type)
if (!next) {
return yield* Effect.fail(new Error(`Unknown agent type: ${params.subagent_type} is not a valid agent type`))
}
const taskID = params.task_id
const session = taskID
? yield* sessions.get(SessionID.make(taskID)).pipe(Effect.catchCause(() => Effect.succeed(undefined)))
: undefined
const parent = yield* sessions.get(ctx.sessionID)
const parentAgent = parent.agent
? yield* agent.get(parent.agent).pipe(Effect.catchCause(() => Effect.succeed(undefined)))
: undefined
const nextSession =
session ??
(yield* sessions.create({
parentID: ctx.sessionID,
title: params.description + ` (@${next.name} subagent)`,
permission: [
...deriveSubagentSessionPermission({
parentSessionPermission: parent.permission ?? [],
parentAgent,
subagent: next,
}),
...(cfg.experimental?.primary_tools?.map((item) => ({
pattern: "*",
action: "allow" as const,
permission: item,
})) ?? []),
],
}))
const msg = yield* Effect.sync(() => MessageV2.get({ sessionID: ctx.sessionID, messageID: ctx.messageID }))
if (msg.info.role !== "assistant") return yield* Effect.fail(new Error("Not an assistant message"))
const model = next.model ?? {
modelID: msg.info.modelID,
providerID: msg.info.providerID,
}
yield* ctx.metadata({
title: params.description,
metadata: {
sessionId: nextSession.id,
model,
},
})
const ops = ctx.extra?.promptOps as TaskPromptOps
if (!ops) return yield* Effect.fail(new Error("TaskTool requires promptOps in ctx.extra"))
const runCancel = yield* EffectBridge.make()
const messageID = MessageID.ascending()
const cancel = ops.cancel(nextSession.id)
function onAbort() {
runCancel.fork(cancel)
}
return yield* Effect.acquireUseRelease(
Effect.sync(() => {
ctx.abort.addEventListener("abort", onAbort)
}),
() =>
Effect.gen(function* () {
const parts = yield* ops.resolvePromptParts(params.prompt)
const result = yield* ops.prompt({
messageID,
sessionID: nextSession.id,
model: {
modelID: model.modelID,
providerID: model.providerID,
},
agent: next.name,
tools: {
...(next.permission.some((rule) => rule.permission === "todowrite") ? {} : { todowrite: false }),
...(next.permission.some((rule) => rule.permission === id) ? {} : { task: false }),
...Object.fromEntries((cfg.experimental?.primary_tools ?? []).map((item) => [item, false])),
},
parts,
})
return {
title: params.description,
metadata: {
sessionId: nextSession.id,
model,
},
output: [
`task_id: ${nextSession.id} (for resuming to continue this task if needed)`,
"",
"<task_result>",
result.parts.findLast((item) => item.type === "text")?.text ?? "",
"</task_result>",
].join("\n"),
}
}),
(_, exit) =>
Effect.gen(function* () {
if (Exit.hasInterrupts(exit)) yield* cancel
}).pipe(
Effect.ensuring(
Effect.sync(() => {
ctx.abort.removeEventListener("abort", onAbort)
}),
),
),
)
})
return {
description: DESCRIPTION,
parameters: Parameters,
execute: (params: Schema.Schema.Type<typeof Parameters>, ctx: Tool.Context) =>
run(params, ctx).pipe(Effect.orDie),
}
}),
)