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fix: strip think tags when model emits leading whitespace before <think> (#327)

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Remove ^ anchor from think/Gemma regexes in ui.js; trimStart() before startsWith checks in messages.js streaming path. Fixes MiniMax M2.7 and any model emitting leading newlines before <think>. 10 new tests, 768 total.
This commit is contained in:
nesquena-hermes
2026-04-12 14:07:00 -07:00
committed by GitHub
parent 7552cd3e9b
commit 9c44d0cf3e
5 changed files with 132 additions and 10 deletions
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11
static/messages.js
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@@ -116,18 +116,21 @@ async function send(){
function _streamDisplay(){
const raw=assistantText;
for(const {open,close} of _thinkPairs){
if(raw.startsWith(open)){
const ci=raw.indexOf(close,open.length);
// Trim leading whitespace before checking for the open tag — some models
// (e.g. MiniMax) emit newlines before <think>.
const trimmed=raw.trimStart();
if(trimmed.startsWith(open)){
const ci=trimmed.indexOf(close,open.length);
if(ci!==-1){
// Thinking block complete — strip it, show the rest
return raw.slice(ci+close.length).replace(/^\s+/,'');
return trimmed.slice(ci+close.length).replace(/^\s+/,'');
}
// Still inside thinking block — show placeholder
return '';
}
// Hide partial tag prefixes while streaming so users don't see
// `<thi`, `<think`, etc. before the model finishes the token.
if(open.startsWith(raw)) return '';
if(open.startsWith(trimmed)) return '';
}
return raw;
}