codemode: add host-side runtime APIs

[mattzcarey]

Summary

• add framework-neutral runtime.execute(), runtime.search(), and runtime.describe() APIs for MCP servers and other non-AI-SDK hosts
• surface connector requiresApproval annotations in method search and describe results
• document direct host execution and discovery, with runtime-handle coverage

This extracts the SDK changes from #1954 so that PR can remain an example-only change using the already released runtime.tool().execute(...) API. The two PRs are independent.

Validation

• pnpm --filter @cloudflare/codemode test — 378 passed
• pnpm --filter @cloudflare/codemode build — passed
• pnpm run check — 117 projects typechecked; exports, formatting, and lint passed

---

[changeset-bot]

🦋 Changeset detected

Latest commit: b49a1d1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudflare/codemode	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.

[pkg-pr-new]

Open in StackBlitz

agents

npm i https://pkg.pr.new/agents@1969

@cloudflare/ai-chat

npm i https://pkg.pr.new/@cloudflare/ai-chat@1969

@cloudflare/codemode

npm i https://pkg.pr.new/@cloudflare/codemode@1969

create-think

npm i https://pkg.pr.new/create-think@1969

hono-agents

npm i https://pkg.pr.new/hono-agents@1969

@cloudflare/shell

npm i https://pkg.pr.new/@cloudflare/shell@1969

@cloudflare/think

npm i https://pkg.pr.new/@cloudflare/think@1969

@cloudflare/voice

npm i https://pkg.pr.new/@cloudflare/voice@1969

@cloudflare/worker-bundler

npm i https://pkg.pr.new/@cloudflare/worker-bundler@1969

commit: b49a1d1