feat(codemode): make model configurable instead of hardcoded gpt-4.1

[Muhammad-Bin-Ali]

Resolves #794

feat(codemode): make model configurable instead of hardcoded gpt-4.1

Problem

experimental_codemode hardcodes openai("gpt-4.1") in the generateObject call (packages/codemode/src/ai.ts:70), preventing users from choosing their own model.

Solution

Add a required model: LanguageModel parameter to experimental_codemode, allowing callers to pass any AI SDK-compatible model.

Changes

• packages/codemode/src/ai.ts
  • Added model: LanguageModel to the options type
  • Replaced openai("gpt-4.1") with options.model in the generateObject call
  • Removed unused @ai-sdk/openai import
• examples/codemode/src/server.ts
  • Passes the existing model variable to the codemode() call

Usage

import { experimental_codemode } from "@cloudflare/codemode/ai";
import { openai } from "@ai-sdk/openai";
const { prompt, tools } = await experimental_codemode({
  model: openai("gpt-5"), // <-- now configurable
  prompt: "You are a helpful assistant",
  tools: {
    /* ... */
  }
  // ...other config
});

Notes

• This is a breaking change since model is required. Callers must now explicitly provide a model. Chosen to make it a breaking change so users are explicitly aware of the model they're using.
• The dist/ artifacts (ai.d.ts, ai.js) need to be regenerated via npm run build in packages/codemode/.

This PR description was generated by OpenCode

[changeset-bot]

🦋 Changeset detected

Latest commit: 5d7314c

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

This PR includes changesets to release 2 packages

Name	Type
@cloudflare/codemode	Patch
agents	Patch

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[claude]

Claude Code Review

Issues:

1. Breaking change incorrectly marked as patch (packages/codemode/src/ai.ts:44)

   • The changeset marks this as a patch, but the PR description acknowledges it's a breaking change
   • Making model required breaks existing code that calls experimental_codemode without it
   • Should be major if truly required, or make it optional with a default to keep it as patch

2. Documentation contradicts implementation (docs/codemode.md:112, packages/codemode/README.md:90,160)

   • Docs say model is "optional, defaults to openai('gpt-4.1')"
   • Type signature shows model?: LanguageModel (optional with ?)
   • Implementation correctly has model?: LanguageModel in the type, which is good

3. Redundant ternary (packages/codemode/src/ai.ts:71)

   • options.model ? options.model : openai("gpt-4.1") should use nullish coalescing: options.model ?? openai("gpt-4.1")

Recommendation:
Change changeset from patch to minor since the parameter is optional (not breaking), but this is a new feature addition.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/cloudflare/agents@849

commit: 5d7314c

[threepointone]

This should be a patch changeset