Every model reasons and intends that reasoning to be replayed, but the
chat-completions wire echoed reasoning_content only to DeepSeek/Kimi/MiMo/
Ollama (plus a hardcoded Portal stealth model) and reasoning_details only to
OpenRouter; turn_context popped `reasoning` everywhere, so Ollama's /v1
(reads only `reasoning`) never saw any.
- message_sanitization owns one route->carrier table
(_REASONING_CARRIER_ROUTES): strict schemas (Mistral, Groq, Cerebras,
SambaNova) get nothing, Fireworks reasoning_content only, OpenRouter-format
gateways (OpenRouter, Kilo, Vercel AI Gateway, Nous Portal) all three,
Novita/MiniMax /v1/TokenHub + reasoning_details, local/Ollama/Upstage +
reasoning, everyone else reasoning_content.
- The " " pad stays limited to the must-echo tier (DeepSeek, Kimi, MiMo);
Ollama leaves it (no echo requirement) and the stealth hardcode is gone.
- Reactive recovery: a 4xx unknown-field rejection that NAMES a reasoning
key this request carried is recorded per (provider, host, model) and the
retry re-shapes api_messages without it. Generic upstream errors never
count; a recorded key falls through, so no loop. History is untouched.
- Nous Portal reads reasoning_details again: the #118182 "replay budget"
does not exist in the Portal and does not reproduce live.
- Gemini thought_signature survives on Gemini hosts/providers even when the
model id is an alias.
- Vendor keep-reasoning flags (docs-only): GLM thinking.clear_thinking=false,
DashScope preserve_thinking / clear_thinking, Kimi K2.x thinking.keep=all.
- stale_thinking_reaches_wire follows the same table, so compaction trigger
and tail walks agree with what is sent.
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