docs: remove references to deprecated consumer and free tiers

[JayadityaGit]

Summary

This PR removes all references to the deprecated consumer account tiers and the free tier for individual developers. According to recent news, these services (including Gemini Code Assist for individuals, Google AI Pro/Ultra, and the unpaid Free Tier) will stop serving requests on June 18, 2026.

Details

All mentions of the following have been removed or rewritten to reflect only supported Standard, Enterprise, and Paid API tiers:

• Free Tier quota and pricing information.
• Google account (Individual) authentication guidance.
• Google AI Pro and AI Ultra subscription details.
• References to consumer-tier privacy notices and terms of service.
• The /upgrade command from the documentation.

Related Issues

Fixes #27998
Related to the deprecation announced for June 18, 2026.

How to Validate

1. Review the modified documentation files:
   • README.md
   • ROADMAP.md
   • docs/changelogs/index.md
   • docs/cli/enterprise.md
   • docs/get-started/authentication.mdx
   • docs/reference/commands.md
   • docs/resources/faq.md
   • docs/resources/quota-and-pricing.md
   • docs/resources/tos-privacy.md
   • docs/resources/troubleshooting.md
2. Run a global search for "Free tier" or "Google One" in the docs and root directories to ensure no lingering references remain.
3. Run npm run lint to ensure no formatting or link issues were introduced.

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed) - N/A for documentation changes
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • Linux
    • npm run (lint)

[github-actions]

📊 PR Size: size/L

• Lines changed: 273
• Additions: +35
• Deletions: -238
• Files changed: 10

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request cleans up the project documentation to align with the upcoming deprecation of consumer and free-tier services for Gemini Code Assist, scheduled for June 18, 2026. All mentions of free-tier quotas, individual-specific authentication flows, and legacy subscription models have been removed to ensure users are directed toward supported Standard and Enterprise offerings.

Highlights

• Deprecation Cleanup: Removed all references to deprecated consumer account tiers and the free tier for individual developers across the documentation suite.
• Documentation Updates: Updated README, roadmap, changelogs, and various guide files to reflect only supported Standard, Enterprise, and Paid API tiers.
• Command Removal: Removed the /upgrade command documentation as it is no longer applicable under the new tier structure.

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[gemini-code-assist]

Code Review

This pull request removes all references to the free tier, individual Google accounts, and individual paid subscriptions (such as Google AI Pro and Ultra) across the documentation, shifting the focus entirely to enterprise, organizational, and paid API/Vertex AI usage. The review feedback points out a circular and redundant sentence in the authentication guide regarding when to set up a Google Cloud project and suggests a cleaner, more direct phrasing.

[gemini-code-assist]

The introductory sentence is circular and redundant because it states "When using a company, school, or Google Workspace account..." and then immediately lists "You are using a company, school, or Google Workspace account" as the first condition.

Since this section is already under the "Sign in with Google" header, we can simplify the introduction to be more direct and clear.

You'll need to set a Google Cloud project when you meet at least one of the following conditions:

[JayadityaGit]

My final update to gemini cli as Google one user... 😢

Thanks team.