When the simple-completion model selected for thread-title generation is a
reasoning model (e.g. MiniMax M2, Claude thinking models, OpenAI o-series),
the 24-token output budget is entirely consumed by the internal thinking
block before any user-visible text is emitted. extractAssistantText then
returns an empty string, generateThreadTitle returns null, and the
auto-thread rename is silently skipped while the feature appears to do
nothing.
Raise DISCORD_THREAD_TITLE_MAX_TOKENS to 512 so there is enough headroom
for a short thinking pass plus the 3-6 word title output. The generous
ceiling only matters when the provider actually reasons; non-reasoning
models still emit a short title and stop early at end-of-sequence.
Verified live against a MiniMax M2 reasoning model served through an
Anthropic-compatible API endpoint: before the fix, the rename never fired;
after the fix, the thread is renamed with a concise generated title.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Hana Chang
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