Persist GitHub auth prompt decision

[vasyafomiuk]

Description

Modify the Coding Agent so that the GitHub login/authentication prompt is shown only once per user. If the user selects "no," store that preference (e.g., in a config file or secure storage) and suppress future prompts unless explicitly reset.

Technical Requirements

• Introduce persistent storage (config file or secure keychain) to save the user�'s choice.
• Provide a command or flag to reset the stored preference when needed.
• Ensure cross-platform compatibility (macOS, Windows, Linux).

Background Context

Meeting Source: Discussion on July 23, 2025
Project Context: coding-agent - Most of the discussion centered on new feature ideas and workflow refinements for the Coding Agent.

Acceptance Criteria

• Auth prompt displayed only on first run if user declines login.
• Preference stored securely and re-read on subsequent launches.
• Manual reset option works and re-enables prompt.

Dependencies & Blockers

• None identified.

Additional Notes

Automatically generated from meeting discussion on 2025-07-23