Greptile Summary

This PR removes Anthropic-specific references from the codebase per legal requirements, including the branded system prompt file, the opencode-anthropic-auth built-in plugin, the claude-code-20250219 beta header flag, and the Anthropic hint from the provider login UI. The documentation is also updated to reflect that Anthropic OAuth/Pro-Max auth is prohibited.

Key changes:

• anthropic-20250930.txt system prompt deleted
• opencode-anthropic-auth@0.0.13 removed from built-in plugins and the OPENCODE_DISABLE_DEFAULT_PLUGINS guard removed with it
• claude-code-20250219 dropped from the anthropic-beta request header
• Provider login hint and docs updated to remove Claude Pro/Max OAuth flow

Issues found:

• The header refactor in llm.ts silently drops the User-Agent: opencode/${VERSION} header that was previously sent to all non-opencode, non-anthropic providers (OpenAI, Google, Azure, etc.) — likely an unintentional side-effect of removing the Anthropic exclusion branch
• Step 2 of the Anthropic section in providers.mdx still references "the Claude Pro/Max option" in its prose, but the accompanying UI code block now only shows Manually enter API Key

Confidence Score: 3/5

• Safe to merge after verifying the User-Agent header removal is intentional and fixing the stale docs prose.
• The core removals (plugin, prompt file, beta flag, UI hint) are clean and well-scoped. Two issues prevent a higher score: the User-Agent header is silently dropped for all non-opencode providers as a side-effect of the llm.ts refactor (a potential P1 regression), and the docs step 2 description is left inconsistent with the updated UI.
• packages/opencode/src/session/llm.ts (User-Agent regression) and packages/web/src/content/docs/providers.mdx (stale step description)

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[LLM.stream called] --> B{providerID starts with 'opencode'?}
    B -- Yes --> C[Add x-opencode-project/session/request/client headers]
    B -- No --> D[No extra headers added]
    C --> E[Merge model.headers]
    D --> E
    E --> F[Merge plugin chat.headers]
    F --> G[streamText call]

    subgraph "Before PR (removed path)"
        H{providerID !== 'anthropic'?}
        H -- Yes --> I["Add User-Agent: opencode/VERSION"]
        H -- No --> J[undefined — no headers]
    end

    style D fill:#f99,stroke:#c00
    style I fill:#9f9,stroke:#090
    style J fill:#ccc,stroke:#999

Comments Outside Diff (1)

1. packages/web/src/content/docs/providers.mdx, line 304-305 (link)

   Stale step description references removed UI option

   The code block in step 2 was correctly updated to only show Manually enter API Key, but the prose above it still says "Here you can select the Claude Pro/Max option and it'll open your browser and ask you to authenticate." — which no longer matches the available UI since the Claude Pro/Max and Create an API Key options were removed.

Last reviewed commit: "anthropic legal requ..."

I can't tell if the lack of noise in here is a good or bad thing haha

Not trying to start something but oooooof this sucks

@thdxr has his hands tied but we as the community can stand up

What should and what can we do???

We need to work together to find a solution that doesn't involve the OpenCode name

We have all the tools

It seems like the change here is that the plugin will not be loaded by default, not that the plugin won't work. It seems like a truly third party plugin is still possible

@griffinmartin has a plugin incoming that will fix

The obvious question here is.. what's the border between normal enforcement of product boundaries and a hostile move against third-party harnesses.

I think the best solution to use Anthropic models with OpenCode without breaking the bank at the moment is through a Copilot subscription.

I've created a gist for research purposes describing how one would implement the OAuth flow and impersonate Claude Code: https://gist.github.com/cedws/3a24b2c7569bb610e24aa90dd217d9f2

For as i know. i been using claude on latest update via custom provider :/ idk if this changes anything beyond our current use for opencode

https://github.com/griffinmartin/opencode-claude-auth

https://www.npmjs.com/package/opencode-claude-auth

Worth considering: https://en.wikipedia.org/wiki/Code_as_speech

shame really

TIL zed already has subagent support. https://zed.dev/releases/stable/0.227.1

thanks for the tip @KieranP

was already using zed for most things, kind of forgot that AI was a thing there since I'd turned it off ..

Edit: nvm, you cannot call subagents within zed yet. guess I'll wait for zed-industries/zed#34154

Is it just me, or is everyone facing that using opencode CLI is consuming more tokens than normally using Claude code CLI ???

Is it just me, or is everyone facing that using opencode

Last time I used OpenCode desktop, it consumed WAY more tokens than Zed.