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bda9aa17cb
When the model mentions <think> as literal text in its response (e.g. "(/think not producing <think> tags)"), the streaming display treated it as a reasoning block opener and suppressed everything after it. The response box would close with truncated content and no error — the API response was complete but the display ate it. Root cause: _stream_delta() matched <think> anywhere in the text stream regardless of position. Real reasoning blocks always start at the beginning of a line; mentions in prose appear mid-sentence. Fix: track line position across streaming deltas with a _stream_last_was_newline flag. Only enter reasoning suppression when the tag appears at a block boundary (start of stream, after a newline, or after only whitespace on the current line). Add a _flush_stream() safety net that recovers buffered content if no closing tag is found by end-of-stream. Also fixes three related issues discovered during investigation: - anthropic_adapter: _get_anthropic_max_output() now normalizes dots to hyphens so 'claude-opus-4.6' matches the 'claude-opus-4-6' table key (was returning 32K instead of 128K) - run_agent: send explicit max_tokens for Claude models on Nous Portal, same as OpenRouter — both proxy to Anthropic's API which requires it. Without it the backend defaults to a low limit that truncates responses. - run_agent: reset truncated_tool_call_retries after successful tool execution so a single truncation doesn't poison the entire conversation.