Function include_preceding_tool_call_open

server/src/server/tool_parser.cpp:128–136

    // object / array — try JSON parse
    if (ptype == "object" || ptype == "array") {
        try { return json::parse(val); } catch (...) { return val; }
    }

    // fallback: try JSON parse, then return as string
    try { return json::parse(val); } catch (...) { return val; }
}

// ─── Removal tracking ───────────────────────────────────────────────────

struct Span {
    size_t start, end;