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Precautions for Using opencode-antigravity-auth in opencode
About opencode
opencode is an open-source AI coding agent available from terminals and IDEs (such as VS Code).
A key feature is that it allows you to switch between multiple AI models (Claude, GPT, Gemini, etc.), making it a highly customizable TUI application.
Notably, its functionality can be extended through a plugin system, allowing it to support specific platforms or authentication methods.
About Using AI Agents via Account Authentication
Typically, when using an AI agent personally, you obtain API keys from providers like OpenAI or Anthropic and pay based on token usage (pay-as-you-go).
However, many users already have monthly subscriptions like "ChatGPT Plus" or "Claude Pro/MAX."
Consequently, there are attempts to run AI agents within the scope of these subscriptions by using browser session information or account authentication instead of API keys.
The advantage of this approach is that it allows the use of high-performance models without paying additional API fees.
Recently, it seems GitHub Copilot has officially become supported.
GitHub Copilot
About Bans and Restrictions from Using Anthropic Subscriptions
There have been cases where Anthropic's subscriptions (such as the MAX plan) were used unofficially with tools like opencode, but there are recent reports that measures such as usage restrictions and account suspensions are being strengthened.
In communities like Reddit, reports suggest that even with expensive plans, if usage that violates the terms of service (such as excessive automation or unofficial access) is detected, accounts may be suspended. Caution is required when using these services through means other than the official API.
(Reference: https://www.reddit.com/r/Anthropic/comments/1pln7ls/claude_refunded_200_and_banned_my_organization/)
Important Note on Using opencode-antigravity-auth
opencode-antigravity-auth is an authentication plugin for accessing Google's "Antigravity" environment. By using this, you can utilize the latest models, such as Gemini 3 Pro, through opencode.
However, the GitHub README mentions that there are significant risks associated with using this plugin.
Relevant Plugin
Quote
Terms of Service Warning — Read Before Installing
[!CAUTION] Using this plugin may violate Google's Terms of Service. A small number of users have reported their Google accounts being banned or shadow-banned (restricted access without explicit notification).
High-risk scenarios:
🚨 Fresh Google accounts have a very high chance of getting banned
🚨 New accounts with Pro/Ultra subscriptions are frequently flagged and banned
By using this plugin, you acknowledge:
This is an unofficial tool not endorsed by Google
Your account may be suspended or permanently banned
You assume all risks associated with using this plugin
Recommendation: Use an established Google account that you don't rely on for critical services. Avoid creating new accounts specifically for this plugin.
Japanese Translation
Terms of Service Warning — Read Before Installing
[!CAUTION] Using this plugin may violate Google's Terms of Service. A small number of users have reported their Google accounts being banned or shadow-banned (restricted access without explicit notification).High-risk scenarios:
🚨 Fresh Google accounts have a very high chance of getting banned
🚨 New accounts with Pro/Ultra subscriptions are frequently flagged and banned
By using this plugin, you acknowledge:This is an unofficial tool not endorsed by Google
Your account may be suspended or permanently banned
You assume all risks associated with using this plugin
Recommendation: Use an established Google account that you don't rely on for critical services. Avoid creating new accounts specifically for this plugin.
In conclusion, you should absolutely avoid using your main Google account.
For example, an account used for payments or your primary Gmail account.
In the worst-case scenario, you could lose access to all Google services, including Gmail and Google Drive.
If you choose to use it, please do so after fully understanding the risks and using an account that wouldn't cause problems even if it were to be suspended.
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