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import { BusEvent } from "@/bus/bus-event"
import z from "zod"
import { Config } from "../config/config"
import { Instance } from "../project/instance"
import { Identifier } from "../id/id"
import PROMPT_INITIALIZE from "./template/initialize.txt"
import PROMPT_REVIEW from "./template/review.txt"
import { MCP } from "../mcp"
import { Skill } from "../skill"
export namespace Command {
export const Event = {
Executed: BusEvent.define(
"command.executed",
z.object({
name: z.string(),
sessionID: Identifier.schema("session"),
arguments: z.string(),
messageID: Identifier.schema("message"),
}),
),
}
export const Info = z
.object({
name: z.string(),
description: z.string().optional(),
agent: z.string().optional(),
model: z.string().optional(),
source: z.enum(["command", "mcp", "skill"]).optional(),
// workaround for zod not supporting async functions natively so we use getters
// https://zod.dev/v4/changelog?id=zfunction
template: z.promise(z.string()).or(z.string()),
subtask: z.boolean().optional(),
hints: z.array(z.string()),
})
.meta({
ref: "Command",
})
// for some reason zod is inferring `string` for z.promise(z.string()).or(z.string()) so we have to manually override it
export type Info = Omit<z.infer<typeof Info>, "template"> & { template: Promise<string> | string }
export function hints(template: string): string[] {
const result: string[] = []
const numbered = template.match(/\$\d+/g)
if (numbered) {
for (const match of [...new Set(numbered)].sort()) result.push(match)
}
if (template.includes("$ARGUMENTS")) result.push("$ARGUMENTS")
return result
}
export const Default = {
INIT: "init",
REVIEW: "review",
} as const
const state = Instance.state(async () => {
const cfg = await Config.get()
const result: Record<string, Info> = {
[Default.INIT]: {
name: Default.INIT,
description: "create/update AGENTS.md",
source: "command",
get template() {
return PROMPT_INITIALIZE.replace("${path}", Instance.worktree)
},
hints: hints(PROMPT_INITIALIZE),
},
[Default.REVIEW]: {
name: Default.REVIEW,
description: "review changes [commit|branch|pr], defaults to uncommitted",
source: "command",
get template() {
return PROMPT_REVIEW.replace("${path}", Instance.worktree)
},
subtask: true,
hints: hints(PROMPT_REVIEW),
},
}
for (const [name, command] of Object.entries(cfg.command ?? {})) {
result[name] = {
name,
agent: command.agent,
model: command.model,
description: command.description,
source: "command",
get template() {
return command.template
},
subtask: command.subtask,
hints: hints(command.template),
}
}
for (const [name, prompt] of Object.entries(await MCP.prompts())) {
result[name] = {
name,
source: "mcp",
description: prompt.description,
get template() {
// since a getter can't be async we need to manually return a promise here
return new Promise<string>(async (resolve, reject) => {
const template = await MCP.getPrompt(
prompt.client,
prompt.name,
prompt.arguments
? // substitute each argument with $1, $2, etc.
Object.fromEntries(prompt.arguments?.map((argument, i) => [argument.name, `$${i + 1}`]))
: {},
).catch(reject)
resolve(
template?.messages
.map((message) => (message.content.type === "text" ? message.content.text : ""))
.join("\n") || "",
)
})
},
hints: prompt.arguments?.map((_, i) => `$${i + 1}`) ?? [],
}
}
// Add skills as invokable commands
for (const skill of await Skill.all()) {
// Skip if a command with this name already exists
if (result[skill.name]) continue
result[skill.name] = {
name: skill.name,
description: skill.description,
source: "skill",
get template() {
return skill.content
},
hints: [],
}
}
return result
})
export async function get(name: string) {
return state().then((x) => x[name])
}
export async function list() {
return state().then((x) => Object.values(x))
}
}