refactor: dedupe cli config cron and install flows

src/cli/cron-cli/register.cron-add.ts

@@ -9,6 +9,7 @@ import { parsePositiveIntOrUndefined } from "../program/helpers.js";
 import {
   getCronChannelOptions,
   parseAt,
+  parseCronStaggerMs,
   parseDurationMs,
   printCronList,
   warnIfCronSchedulerDisabled,
@@ -129,19 +130,7 @@ export function registerCronAddCommand(cron: Command) {
               }
               return { kind: "every" as const, everyMs };
             }
-            const staggerMs = (() => {
-              if (useExact) {
-                return 0;
-              }
-              if (!staggerRaw) {
-                return undefined;
-              }
-              const parsed = parseDurationMs(staggerRaw);
-              if (!parsed) {
-                throw new Error("Invalid --stagger; use e.g. 30s, 1m, 5m");
-              }
-              return parsed;
-            })();
+            const staggerMs = parseCronStaggerMs({ staggerRaw, useExact });
             return {
               kind: "cron" as const,
               expr: cronExpr,

src/cli/cron-cli/register.cron-edit.ts

@@ -7,6 +7,7 @@ import { addGatewayClientOptions, callGatewayFromCli } from "../gateway-rpc.js";
 import {
   getCronChannelOptions,
   parseAt,
+  parseCronStaggerMs,
   parseDurationMs,
   warnIfCronSchedulerDisabled,
 } from "./shared.js";
@@ -98,19 +99,7 @@ export function registerCronEditCommand(cron: Command) {
           if (staggerRaw && useExact) {
             throw new Error("Choose either --stagger or --exact, not both");
           }
-          const requestedStaggerMs = (() => {
-            if (useExact) {
-              return 0;
-            }
-            if (!staggerRaw) {
-              return undefined;
-            }
-            const parsed = parseDurationMs(staggerRaw);
-            if (!parsed) {
-              throw new Error("Invalid --stagger; use e.g. 30s, 1m, 5m");
-            }
-            return parsed;
-          })();
+          const requestedStaggerMs = parseCronStaggerMs({ staggerRaw, useExact });
 
           const patch: Record<string, unknown> = {};
           if (typeof opts.name === "string") {

src/cli/cron-cli/shared.ts

@@ -62,6 +62,23 @@ export function parseDurationMs(input: string): number | null {
   return Math.floor(n * factor);
 }
 
+export function parseCronStaggerMs(params: {
+  staggerRaw: string;
+  useExact: boolean;
+}): number | undefined {
+  if (params.useExact) {
+    return 0;
+  }
+  if (!params.staggerRaw) {
+    return undefined;
+  }
+  const parsed = parseDurationMs(params.staggerRaw);
+  if (!parsed) {
+    throw new Error("Invalid --stagger; use e.g. 30s, 1m, 5m");
+  }
+  return parsed;
+}
+
 export function parseAt(input: string): string | null {
   const raw = input.trim();
   if (!raw) {