feat(cli): 1.5.0 — CLI-first architecture, tool-less MCP, policy engine

CLI becomes the API; MCP becomes a tool-less push-pipe. Bundle -42%
(250 KB → 146 KB) after stripping ~1700 lines of dead tool handlers.

- Tool-less MCP: tools/list returns []. Inbound peer messages still
  arrive as experimental.claude/channel notifications mid-turn.
- Resource-noun-verb CLI: peer list, message send, memory recall, etc.
  Legacy flat verbs (peers, send, remember) remain as aliases.
- Bundled claudemesh skill auto-installed by `claudemesh install` —
  sole CLI-discoverability surface for Claude.
- Unix-socket bridge: CLI invocations dial the push-pipe's warm WS
  (~220 ms warm vs ~600 ms cold).
- --mesh <slug> flag: connect a session to multiple meshes.
- Policy engine: every broker-touching verb runs through a YAML gate
  at ~/.claudemesh/policy.yaml (auto-created). Destructive verbs
  prompt; non-TTY auto-denies. Audit log at ~/.claudemesh/audit.log.
- --approval-mode plan|read-only|write|yolo + --policy <path>.

Spec: .artifacts/specs/2026-05-02-architecture-north-star.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cli/src/commands/completions.ts

@@ -8,6 +8,7 @@
  */
 
 import { EXIT } from "~/constants/exit-codes.js";
+import { render } from "~/ui/render.js";
 
 const COMMANDS = [
   "create", "new", "join", "add", "launch", "connect", "disconnect",
@@ -102,7 +103,7 @@ complete -c claudemesh -l join -d 'invite url'
 
 export async function runCompletions(shell: string | undefined): Promise<number> {
   if (!shell) {
-    console.error("Usage: claudemesh completions <bash|zsh|fish>");
+    render.err("Usage: claudemesh completions <bash|zsh|fish>");
     return EXIT.INVALID_ARGS;
   }
   switch (shell.toLowerCase()) {
@@ -116,7 +117,7 @@ export async function runCompletions(shell: string | undefined): Promise<number>
       process.stdout.write(fish());
       return EXIT.SUCCESS;
     default:
-      console.error(`Unsupported shell: ${shell}. Use bash, zsh, or fish.`);
+      render.err(`Unsupported shell: ${shell}`, "use bash, zsh, or fish.");
       return EXIT.INVALID_ARGS;
   }
 }