feat: add Trinity model system prompt support#12025
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rekram1-node merged 2 commits intoanomalyco:devfrom Feb 3, 2026
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feat: add Trinity model system prompt support#12025rekram1-node merged 2 commits intoanomalyco:devfrom
rekram1-node merged 2 commits intoanomalyco:devfrom
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Hey! Your PR title Please update it to start with one of:
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This reverts commit 015cd40.
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What does this PR do?
Adds system prompt support for Trinity models (via OpenRouter) to address known behaviours with tool calling and the model looping. When the model id contains "trinity", we use a dedicated prompt: XML-only tool calls, exactly one tool per message, wait for the result before continuing, use the question tool when the request is vague, and avoid repeating the same tool with the same params. The prompt is a small change on top of the default prompt: same content except the "Tool usage policy" section is replaced with these Trinity rules. Routing is a single check in SystemPrompt.provider() in system.ts before the default branch.
Closes #12027
How did you verify your code works?
Locally added a system.test.ts file to the Trinity prompt is returned for arcee-ai/trinity-large-preview:free, arcee-ai/trinity-mini, and arcee-ai/trinity-mini:free; those tests passed. Also ran OpenCode in the terminal (TUI), selected arcee-ai/trinity-large-preview:free via OpenRouter, sent a message, and used temporary debug logging to confirm the model was detected and the Trinity prompt was selected.