refactor: replace maxRounds with supervisor check interval

Removes maxRounds as a hard stop limit from the entire stack. The supervisor
(already configured via workflow.yaml supervisorInterval) is now the sole
termination authority.

Changes across 27 files in 11 packages:
- workflow-protocol: StartStep.meta is now empty, StartNodePayload drops maxRounds
- workflow-cas: isStartPayload no longer checks maxRounds
- workflow-execute: engine, worker, fork-thread all stripped of maxRounds plumbing
- cli-workflow: --max-rounds flag removed from CLI and HTTP API
- workflow-runtime: build-context and create-workflow no longer reference maxRounds
- workflow-dashboard: UI no longer sends maxRounds
- workflow-template-develop/solve-issue: moderator no longer checks rounds remaining
- All tests updated

Fixes #185

packages/cli-workflow/src/commands/serve/routes-thread.ts

@@ -156,13 +156,12 @@ export function createThreadRoutes(storageRoot: string): Hono {
 
     const name = body.workflow;
     const prompt = body.prompt;
-    const maxRounds = typeof body.maxRounds === "number" ? body.maxRounds : 10;
 
     if (typeof name !== "string" || typeof prompt !== "string") {
       return c.json({ error: "workflow (string) and prompt (string) are required" }, 400);
     }
 
-    const result = await cmdRun(storageRoot, name, prompt, maxRounds);
+    const result = await cmdRun(storageRoot, name, prompt);
     if (!result.ok) {
       return c.json({ error: result.error }, 400);
     }

packages/cli-workflow/src/commands/thread/dispatch.ts

@@ -26,12 +26,7 @@ export async function dispatchRun(storageRoot: string, argv: string[]): Promise<
     return 1;
   }
 
-  const result = await cmdRun(
-    storageRoot,
-    parsed.value.name,
-    parsed.value.prompt,
-    parsed.value.maxRounds,
-  );
+  const result = await cmdRun(storageRoot, parsed.value.name, parsed.value.prompt);
   if (!result.ok) {
     printCliError(result.error);
     return 1;
@@ -166,7 +161,7 @@ export async function dispatchFork(storageRoot: string, argv: string[]): Promise
 export const THREAD_SUBCOMMAND_TABLE: Record<string, CommandEntry> = {
   run: {
     handler: dispatchRun,
-    args: "<name> [--prompt <text>] [--max-rounds N]",
+    args: "<name> [--prompt <text>]",
     description: "Start a new thread executing a workflow",
   },
   list: {

packages/cli-workflow/src/commands/thread/run.ts

@@ -10,7 +10,6 @@ export async function cmdRun(
   storageRoot: string,
   name: string,
   prompt: string,
-  maxRounds: number,
 ): Promise<Result<{ threadId: string }, string>> {
   const nameOk = validateCliWorkflowName(name);
   if (!nameOk.ok) {
@@ -41,7 +40,7 @@ export async function cmdRun(
       threadId,
       workflowName: name,
       prompt,
-      options: { maxRounds, depth: 0 },
+      options: { depth: 0 },
     },
     { awaitResponseLine: false },
   );

packages/cli-workflow/src/run-argv.ts

@@ -3,12 +3,12 @@ import { err, ok, type Result } from "@uncaged/workflow-protocol";
 export type ParsedRunArgv = {
   name: string;
   prompt: string;
-  maxRounds: number;
 };
 
-type FlagOk = { kind: "prompt"; value: string } | { kind: "max-rounds"; value: number };
-
-function parseFlagAt(argv: string[], index: number): Result<FlagOk, string> | null {
+function parseFlagAt(
+  argv: string[],
+  index: number,
+): Result<{ kind: "prompt"; value: string }, string> | null {
   const flag = argv[index];
   if (flag === "--prompt") {
     const value = argv[index + 1];
@@ -17,24 +17,12 @@ function parseFlagAt(argv: string[], index: number): Result<FlagOk, string> | nu
     }
     return ok({ kind: "prompt", value });
   }
-  if (flag === "--max-rounds") {
-    const value = argv[index + 1];
-    if (value === undefined) {
-      return err("missing value for --max-rounds");
-    }
-    const n = Number(value);
-    if (!Number.isFinite(n) || !Number.isInteger(n) || n < 0) {
-      return err("--max-rounds must be a non-negative integer");
-    }
-    return ok({ kind: "max-rounds", value: n });
-  }
   return null;
 }
 
 export function parseRunArgv(argv: string[]): Result<ParsedRunArgv, string> {
   let name: string | undefined;
   let prompt = "";
-  let maxRounds = 10;
 
   let i = 0;
   const first = argv[0];
@@ -54,12 +42,7 @@ export function parseRunArgv(argv: string[]): Result<ParsedRunArgv, string> {
     }
 
     const flag = parsed.value;
-    if (flag.kind === "prompt") {
-      prompt = flag.value;
-      i += 2;
-      continue;
-    }
-    maxRounds = flag.value;
+    prompt = flag.value;
     i += 2;
   }
 
@@ -67,5 +50,5 @@ export function parseRunArgv(argv: string[]): Result<ParsedRunArgv, string> {
     return err("run requires <name>");
   }
 
-  return ok({ name, prompt, maxRounds });
+  return ok({ name, prompt });
 }

packages/cli-workflow/src/skill.ts

@@ -107,12 +107,6 @@ ${commandSections.join("\n\n")}
 | \`completed\` | Finished with \`returnCode === 0\` (has \`__end__\` frame in CAS) |
 | \`failed\` | Finished with non-zero return code, or worker crashed (dead PID / no ctl) |
 
-## Defaults
-
-| Setting | CLI | HTTP API |
-|---------|-----|----------|
-| \`maxRounds\` | 10 | 10 |
-
 ## Exit Codes
 
 | Code | Meaning |