feat(wizard): hand provisioned accounts to coding agent skills

[MattBro]

Problem

Newly provisioned accounts need installation instructions for their own coding agent instead of hosted inference.

Changes

New signups and the server's provisioning refusal now open the skill handoff. Headless runs save instructions and exit successfully. Saved project configuration contains the SDK capture token, host, and project ID; it excludes OAuth and personal API credentials.

The backend restriction must deploy before provisioning is enabled.

Rendered Ink test fixtures, before and after

Setup flow

Before:

flowchart LR
  A[Account created] --> B[Attempt hosted setup]
  classDef phYellow fill:#f9bd2b,stroke:#f9bd2b,color:#000;
  classDef phBlue fill:#1d4aff,stroke:#1d4aff,color:#fff;
  class A phYellow;
  class B phBlue;

Loading

After:

flowchart LR
  A[Account created] --> B[Installation skill] --> C[User coding agent]
  classDef phYellow fill:#f9bd2b,stroke:#f9bd2b,color:#000;
  classDef phGray fill:#e5e7eb,stroke:#c7ccd1,color:#000;
  classDef phBlue fill:#1d4aff,stroke:#1d4aff,color:#fff;
  class A phYellow;
  class B phGray;
  class C phBlue;

Loading

Test plan

Signup, existing login, repeated refusals, headless completion, and credential exclusion pass focused tests. New regressions fail without the changes. Lint and build pass. Typecheck retains 28 baseline errors. No live signup tested.

LLM context

Codex, GPT-6. Skills: wizard-development, ink-tui, pr-ready, writing-pr-descriptions, unambiguous-agent-text. Independent review found no outstanding issues. CodeRabbit CLI unavailable. Test fixtures use synthetic data.

[github-actions]

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