Move parse_leaked_tool_calls, strip_leaked_artifacts, and their
helpers (normalize_xml_tags, parse_qwen_tag, parse_xml_tool_call,
parse_json_tool_call) from agent.rs into their own module.
These functions have zero dependency on Agent or ContextState —
they're pure text parsing. All 4 existing tests move with them.
Reduces agent.rs by ~200 lines.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Qwen 3.5 27B <noreply@qwen.ai>
