import type {  ResourceTelemetryProcessCategory,  ServerProcessDiagnosticsEntry,  ServerProcessDiagnosticsResult,  ServerProcessSignal,  ServerSignalProcessResult,} from "@t3tools/contracts";import * as Context from "effect/Context";import * as Effect from "effect/Effect";import * as Layer from "effect/Layer";import * as Option from "effect/Option";import * as Schema from "effect/Schema"; import * as ResourceTelemetry from "../resourceTelemetry/ResourceTelemetry.ts"; export class ProcessSignalFailed extends Schema.TaggedError<ProcessSignalFailed>()(  "ProcessSignalFailed",  {    pid: Schema.Number,    signal: Schema.String,    cause: Schema.Defect(),  },) {  override get message(): string {    return `Failed to signal process ${this.pid} with ${this.signal}.`;  }} export class ProcessDiagnostics extends Context.Service<  ProcessDiagnostics,  {    readonly read: Effect.Effect<ServerProcessDiagnosticsResult>;    readonly signal: (input: {      readonly pid: number;      readonly startTimeMs: number;      readonly signal: ServerProcessSignal;    }) => Effect.Effect<ServerSignalProcessResult>;  }>()("t3/diagnostics/ProcessDiagnostics") {} function formatElapsed(runTimeMs: number): string {  const totalSeconds = Math.max(0, Math.floor(runTimeMs / 1_000));  const hours = Math.floor(totalSeconds / 3_600);  const minutes = Math.floor((totalSeconds % 3_600) / 60);  const seconds = totalSeconds % 60;  return hours > 0    ? `${hours}:${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`    : `${minutes}:${String(seconds).padStart(2, "0")}`;} function canSignalCategory(category: ResourceTelemetryProcessCategory): boolean {  return (    category === "server-child" || category === "provider-root" || category === "terminal-root"  );} /** @public Service construction is part of the canonical Effect module API. */export const make = Effect.fn("makeProcessDiagnostics")(function* () {  const telemetry = yield* ResourceTelemetry.ResourceTelemetry;  const refreshedTelemetry = telemetry.refresh.pipe(Effect.catch(() => telemetry.latest));  const read: ProcessDiagnostics["Service"]["read"] = refreshedTelemetry.pipe(    Effect.map((snapshot) => {      const processes = snapshot.processes        .filter((entry) => canSignalCategory(entry.category))        .map((entry): ServerProcessDiagnosticsEntry => ({          pid: entry.identity.pid,          startTimeMs: entry.identity.startTimeMs,          ppid: entry.ppid,          pgid: Option.none(),          status: entry.status || "Unknown",          cpuPercent: entry.cpuPercent,          rssBytes: entry.residentBytes,          elapsed: formatElapsed(entry.runTimeMs),          command: entry.command || entry.name || "unknown",          depth: Math.max(0, entry.depth - 1),          childPids: entry.childPids,        }));      return {        serverPid: process.pid,        readAt: snapshot.readAt,        processCount: processes.length,        totalRssBytes: processes.reduce((total, entry) => total + entry.rssBytes, 0),        totalCpuPercent: processes.reduce((total, entry) => total + entry.cpuPercent, 0),        processes,        error: Option.map(snapshot.health.native.lastError, (message) => ({ message })),      };    }),  );   const signal: ProcessDiagnostics["Service"]["signal"] = Effect.fn("ProcessDiagnostics.signal")(    function* (input) {      if (input.pid === process.pid) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some("Refusing to signal the T3 server process."),        };      }      const current = yield* telemetry.refresh.pipe(Effect.option);      if (Option.isNone(current)) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some(            `Could not refresh process ${input.pid}; refusing to signal a stale identity.`,          ),        };      }      const selected = current.value.processes.find(        (entry) =>          entry.identity.pid === input.pid && entry.identity.startTimeMs === input.startTimeMs,      );      if (!selected) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some(            `Process ${input.pid} no longer matches the selected process identity.`,          ),        };      }      if (!canSignalCategory(selected.category)) {        return {          pid: input.pid,          signal: input.signal,          signaled: false,          message: Option.some(`Process ${input.pid} is not a signalable T3 backend descendant.`),        };      }      return yield* Effect.try({        try: () => {          process.kill(input.pid, input.signal);          return {            pid: input.pid,            signal: input.signal,            signaled: true,            message: Option.none(),          };        },        catch: (cause) =>          new ProcessSignalFailed({            pid: input.pid,            signal: input.signal,            cause,          }),      }).pipe(        Effect.catch((error) =>          Effect.succeed({            pid: input.pid,            signal: input.signal,            signaled: false,            message: Option.some(              error instanceof Error ? error.message : "Failed to signal process.",            ),          }),        ),      );    },  );   return ProcessDiagnostics.of({ read, signal });}); export const layer = Layer.effect(ProcessDiagnostics, make());