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@@ -1 +1,188 @@
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-export * as Command from "./command"
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+import { BusEvent } from "@/bus/bus-event"
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+import { InstanceState } from "@/effect"
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+import { EffectBridge } from "@/effect"
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+import type { InstanceContext } from "@/project/instance"
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+import { SessionID, MessageID } from "@/session/schema"
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+import { Effect, Layer, Context } from "effect"
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+import z from "zod"
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+import { Config } from "../config"
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+import { MCP } from "../mcp"
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+import { Skill } from "../skill"
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+import PROMPT_INITIALIZE from "./template/initialize.txt"
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+import PROMPT_REVIEW from "./template/review.txt"
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+
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+type State = {
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+ commands: Record<string, Info>
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+}
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+
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+export const Event = {
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+ Executed: BusEvent.define(
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+ "command.executed",
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+ z.object({
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+ name: z.string(),
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+ sessionID: SessionID.zod,
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+ arguments: z.string(),
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+ messageID: MessageID.zod,
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+ }),
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+ ),
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+}
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+
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+export const Info = z
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+ .object({
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+ name: z.string(),
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+ description: z.string().optional(),
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+ agent: z.string().optional(),
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+ model: z.string().optional(),
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+ source: z.enum(["command", "mcp", "skill"]).optional(),
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+ // workaround for zod not supporting async functions natively so we use getters
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+ // https://zod.dev/v4/changelog?id=zfunction
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+ template: z.promise(z.string()).or(z.string()),
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+ subtask: z.boolean().optional(),
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+ hints: z.array(z.string()),
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+ })
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+ .meta({
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+ ref: "Command",
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+ })
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+
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+// for some reason zod is inferring `string` for z.promise(z.string()).or(z.string()) so we have to manually override it
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+export type Info = Omit<z.infer<typeof Info>, "template"> & { template: Promise<string> | string }
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+
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+export function hints(template: string) {
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+ const result: string[] = []
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+ const numbered = template.match(/\$\d+/g)
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+ if (numbered) {
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+ for (const match of [...new Set(numbered)].sort()) result.push(match)
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+ }
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+ if (template.includes("$ARGUMENTS")) result.push("$ARGUMENTS")
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+ return result
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+}
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+
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+export const Default = {
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+ INIT: "init",
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+ REVIEW: "review",
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+} as const
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+
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+export interface Interface {
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+ readonly get: (name: string) => Effect.Effect<Info | undefined>
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+ readonly list: () => Effect.Effect<Info[]>
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+}
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+
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+export class Service extends Context.Service<Service, Interface>()("@opencode/Command") {}
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+
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+export const layer = Layer.effect(
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+ Service,
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+ Effect.gen(function* () {
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+ const config = yield* Config.Service
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+ const mcp = yield* MCP.Service
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+ const skill = yield* Skill.Service
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+
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+ const init = Effect.fn("Command.state")(function* (ctx: InstanceContext) {
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+ const cfg = yield* config.get()
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+ const bridge = yield* EffectBridge.make()
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+ const commands: Record<string, Info> = {}
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+
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+ commands[Default.INIT] = {
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+ name: Default.INIT,
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+ description: "guided AGENTS.md setup",
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+ source: "command",
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+ get template() {
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+ return PROMPT_INITIALIZE.replace("${path}", ctx.worktree)
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+ },
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+ hints: hints(PROMPT_INITIALIZE),
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+ }
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+ commands[Default.REVIEW] = {
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+ name: Default.REVIEW,
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+ description: "review changes [commit|branch|pr], defaults to uncommitted",
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+ source: "command",
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+ get template() {
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+ return PROMPT_REVIEW.replace("${path}", ctx.worktree)
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+ },
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+ subtask: true,
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+ hints: hints(PROMPT_REVIEW),
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+ }
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+
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+ for (const [name, command] of Object.entries(cfg.command ?? {})) {
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+ commands[name] = {
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+ name,
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+ agent: command.agent,
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+ model: command.model,
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+ description: command.description,
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+ source: "command",
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+ get template() {
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+ return command.template
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+ },
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+ subtask: command.subtask,
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+ hints: hints(command.template),
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+ }
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+ }
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+
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+ for (const [name, prompt] of Object.entries(yield* mcp.prompts())) {
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+ commands[name] = {
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+ name,
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+ source: "mcp",
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+ description: prompt.description,
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+ get template() {
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+ return bridge.promise(
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+ mcp
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+ .getPrompt(
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+ prompt.client,
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+ prompt.name,
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+ prompt.arguments
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+ ? Object.fromEntries(prompt.arguments.map((argument, i) => [argument.name, `$${i + 1}`]))
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+ : {},
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+ )
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+ .pipe(
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+ Effect.map(
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+ (template) =>
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+ template?.messages
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+ .map((message) => (message.content.type === "text" ? message.content.text : ""))
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+ .join("\n") || "",
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+ ),
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+ ),
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+ )
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+ },
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+ hints: prompt.arguments?.map((_, i) => `$${i + 1}`) ?? [],
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+ }
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+ }
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+
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+ for (const item of yield* skill.all()) {
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+ if (commands[item.name]) continue
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+ commands[item.name] = {
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+ name: item.name,
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+ description: item.description,
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+ source: "skill",
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+ get template() {
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+ return item.content
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+ },
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+ hints: [],
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+ }
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+ }
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+
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+ return {
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+ commands,
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+ }
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+ })
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+
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+ const state = yield* InstanceState.make<State>((ctx) => init(ctx))
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+
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+ const get = Effect.fn("Command.get")(function* (name: string) {
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+ const s = yield* InstanceState.get(state)
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+ return s.commands[name]
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+ })
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+
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+ const list = Effect.fn("Command.list")(function* () {
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+ const s = yield* InstanceState.get(state)
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+ return Object.values(s.commands)
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+ })
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+
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+ return Service.of({ get, list })
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+ }),
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+)
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+
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+export const defaultLayer = layer.pipe(
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+ Layer.provide(Config.defaultLayer),
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+ Layer.provide(MCP.defaultLayer),
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+ Layer.provide(Skill.defaultLayer),
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+)
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+
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+export * as Command from "."
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Kit Langton