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Skip magic words system prompt injection for Haiku models #10

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Skip magic words system prompt injection for Haiku models #10

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25 changes: 16 additions & 9 deletions server/ClaudeRequest.js
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Original file line number Diff line number Diff line change
Expand Up @@ -333,19 +333,26 @@ class ClaudeRequest {
processRequestBody(body, presetName = null) {
if (!body) return body;

const systemPrompt = {
type: 'text',
text: 'You are Claude Code, Anthropic\'s official CLI for Claude.'
};
// Skip system prompt injection for Haiku models
const isHaiku = body.model && body.model.toLowerCase().includes('haiku');

if (body.system) {
if (Array.isArray(body.system)) {
body.system.unshift(systemPrompt);
if (!isHaiku) {
const systemPrompt = {
type: 'text',
text: 'You are Claude Code, Anthropic\'s official CLI for Claude.'
};

if (body.system) {
if (Array.isArray(body.system)) {
body.system.unshift(systemPrompt);
} else {
body.system = [systemPrompt, { type: 'text', text: body.system }];
}
} else {
body.system = [systemPrompt, body.system];
body.system = [systemPrompt];
}
} else {
body.system = [systemPrompt];
Logger.debug('Skipping Claude Code system prompt for Haiku model');
}

if (presetName) {
Expand Down