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Anthropic takes legal action against OpenCode

anthropic legal requests by thdxr · Pull Request #18186 · anomalyco/opencode

github.com

March 19, 2026

3 min read

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67/100

Summary

Anthropic-specific references have been removed from the codebase to comply with legal requirements, including the branded system prompt file. The changes include the addition of headers for requests when the providerID starts with 'opencode'.

Key Takeaways

The codebase has removed all references to Anthropic due to legal requirements, including the branded system prompt file.
The refactored code now only adds specific headers for providers starting with 'opencode' and omits the User-Agent header for all other providers, including OpenAI and Google.
There is a potential unintended side-effect of the changes, as the removal of the Anthropic-specific exclusion may lead to the silent loss of the User-Agent header for third-party providers.
The plugin will not be loaded by default, but it remains possible to use third-party plugins.

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Community Sentiment

Negative

Positives

The subscription model for Claude Code offers a more cost-effective solution for users compared to the usage-based pricing of the Claude API, which could enhance accessibility.

Concerns

Anthropic's legal actions against OpenCode and OpenClaw suggest a troubling trend of stifling open-source innovation, which could harm their reputation in the AI community.
The perception of Anthropic's actions as petty and bitter indicates a potential disconnect with the developer community, raising concerns about their commitment to collaboration.