fix(ui): stop stripping the word assistant from rendered text (#5974)

* fix: stop stripping the word 'assistant' from rendered text

The QWEN_BARE_MARKER_RE regex in both the Python backend (tool_parsing.py)
and JS frontend (chatRenderer.js) was matching any standalone occurrence of
the word 'assistant' separated by any whitespace, then replacing it with a
space. This caused normal English uses like 'Home assistant' to render as
'Home '.

Fixed by narrowing the word-boundary check from [\t\r\n ] (any whitespace)
to [\r\n] (line boundaries only), so only Qwen-format role-token leaks
(where 'assistant' appears alone on a line) are stripped.

* fix(tests): update bare-marker test expectations for #5971

Move 'x assistant y' from STRIPPED to KEPT (mid-sentence must survive).
Add 'Before\nassistant\nAfter' to STRIPPED (bare-marker on own line).

* fix(ui): strip whitespace-padded assistant role markers

---------

Co-authored-by: samy <samy@users.noreply.github.com>
Co-authored-by: Alexandre Teixeira <alexandremagteixeira@gmail.com>
This commit is contained in:
Samy
2026-08-12 01:47:11 +01:00
committed by GitHub
co-authored by samy Alexandre Teixeira
parent bea48c749c
commit d87a913729
3 changed files with 6 additions and 3 deletions
+1 -1
View File
@@ -481,7 +481,7 @@ const QWEN_ROLE_MARKER_RE = /<\/?\|(?:assistant|assistan|user|system|tool)\|>?|<
// Keep in sync with _QWEN_BARE_MARKER_RE in src/tool_parsing.py. At least one
// pipe is required around `end`: with both optional (`\|?end\|?`) this also ate
// a bare `end` on its own line, breaking Ruby/Lua/shell snippets (#5547).
const QWEN_BARE_MARKER_RE = /(?:^|[\t\r\n ])(?:\/?\|end\||\|end|end\|)(?=[\t\r\n ]|$)|(?:^|[\t\r\n ])assistan(?:t)?(?=[\t\r\n ]|$)/gi;
const QWEN_BARE_MARKER_RE = /(?:^|[\t\r\n ])(?:\/?\|end\||\|end|end\|)(?=[\t\r\n ]|$)|(?:^|[\r\n])[ \t]*assistan(?:t)?[ \t]*(?=[\r\n]|$)/gi;
// Self-narration about tool results (model echoing stdout/exit_code)
const TOOL_NARRATION_RE = /(?:The (?:result|output) shows?:?\s*)?-?\s*(?:stdout|stderr|exit_code):\s*.+/gi;