Resolve remaining PR review comments

- Remove redundant project-existence check after autoDetectProject
- Wrap SIGTERM in try/catch for restart flow (dead process case)
- Remove unused setCallerContext export from caller-context.ts
- Fix unused vi import lint error in init.test.ts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/cli/__tests__/commands/init.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, vi } from "vitest";
+import { describe, it, expect } from "vitest";
 
 import { Command } from "commander";
 import { registerInit } from "../../src/commands/init.js";

packages/cli/__tests__/commands/start.test.ts

@@ -127,7 +127,6 @@ vi.mock("../../src/lib/running-state.js", () => ({
 vi.mock("../../src/lib/caller-context.js", () => ({
   isHumanCaller: vi.fn().mockReturnValue(true),
   getCallerType: vi.fn().mockReturnValue("human"),
-  setCallerContext: vi.fn(),
 }));
 
 vi.mock("../../src/lib/detect-env.js", () => ({

packages/cli/src/commands/spawn.ts

@@ -214,15 +214,6 @@ export function registerSpawn(program: Command): void {
           }
         }
 
-        if (!config.projects[projectId]) {
-          console.error(
-            chalk.red(
-              `Unknown project: ${projectId}\nAvailable: ${Object.keys(config.projects).join(", ")}`,
-            ),
-          );
-          process.exit(1);
-        }
-
         if (!opts.claimPr && opts.assignOnGithub) {
           console.error(chalk.red("--assign-on-github requires --claim-pr on `ao spawn`."));
           process.exit(1);

packages/cli/src/commands/start.ts

@@ -802,7 +802,7 @@ export function registerStart(program: Command): void {
                 project = config.projects[newId];
                 // Continue to startup below
               } else if (choice.trim() === "3") {
-                process.kill(running.pid, "SIGTERM");
+                try { process.kill(running.pid, "SIGTERM"); } catch { /* already dead */ }
                 const { waitForExit } = await import("../lib/running-state.js");
                 if (!waitForExit(running.pid, 5000)) {
                   console.log(chalk.yellow("  Process didn't exit cleanly, sending SIGKILL..."));

packages/cli/src/lib/caller-context.ts

@@ -1,13 +1,5 @@
 export type CallerType = "human" | "orchestrator" | "agent";
 
-export interface CallerContextOpts {
-  callerType: CallerType;
-  sessionId?: string;
-  projectId?: string;
-  configPath?: string;
-  port?: number;
-}
-
 /**
  * Detect who is calling the CLI.
  * - If AO_CALLER_TYPE is set, trust it.
@@ -28,18 +20,3 @@ export function getCallerType(): CallerType {
 export function isHumanCaller(): boolean {
   return getCallerType() === "human";
 }
-
-/**
- * Inject AO context environment variables into an env record.
- * Used when spawning orchestrator/agent sessions so they know their context.
- */
-export function setCallerContext(
-  env: Record<string, string>,
-  opts: CallerContextOpts,
-): void {
-  env["AO_CALLER_TYPE"] = opts.callerType;
-  if (opts.sessionId) env["AO_SESSION_ID"] = opts.sessionId;
-  if (opts.projectId) env["AO_PROJECT_ID"] = opts.projectId;
-  if (opts.configPath) env["AO_CONFIG_PATH"] = opts.configPath;
-  if (opts.port !== undefined && opts.port !== null) env["AO_PORT"] = String(opts.port);
-}