feat(cli): add onboarding with openai as option

[uinstinct]

Description

• Add openai api key (with gpt 5.4) as onboarding provider and model.
• Also remove login with continue from onboarding options
• Use local model config instead of hub uses

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Checklist

• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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Tests

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Summary by cubic

Adds OpenAI (GPT 5.4) to CLI onboarding and removes “Log in with Continue”. The flow writes local model entries to ~/.continue/config.yaml and validates Anthropic and OpenAI keys.

• New Features

  • OpenAI option: prompt for an “sk-” key and write gpt-5.4 to config.
  • Anthropic path remains with auto-detection of ANTHROPIC_API_KEY.

• Refactors

  • Replace hub “uses” with local fields (name, provider, model, apiKey) across onboarding, YAML updater, and docs.
  • Separate config writers for Anthropic and OpenAI; update service init and add provider-specific key validation errors.

^{Written for commit a48d9ec. Summary will update on new commits.}

[cubic-dev-ai]

3 issues found across 5 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="extensions/cli/src/onboarding.ts">

<violation number="1" location="extensions/cli/src/onboarding.ts:114">
P1: Custom agent: **Don't use console.log**

New console logging was added; replace these with the project logger to comply with the "Don't use console.log" rule.</violation>
</file>

<file name="extensions/cli/src/util/apiKeyValidation.ts">

<violation number="1" location="extensions/cli/src/util/apiKeyValidation.ts:22">
P2: OpenAI API key validation is overly permissive and can incorrectly accept Anthropic keys (sk-ant-...), leading to false-positive onboarding validation. The `startsWith("sk-")` check will match Anthropic keys since they also start with "sk-", causing provider-mismatch errors when the key is later used with OpenAI APIs.</violation>
</file>

<file name="extensions/cli/spec/onboarding.md">

<violation number="1" location="extensions/cli/spec/onboarding.md:34">
P2: Spec documents stale `uses:` schema that conflicts with actual onboarding implementation. The spec shows `uses: openai/gpt-5.4` with `with:` blocks, but the CLI onboarding writes local model configs. Users following this documentation will create invalid configs.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}