Scan — Discovers all JSONL session files under ~/.claude/projects/ and parses them in parallel using a thread pool. A fast-reject byte check skips progress and history-snapshot lines (~77% of all lines) before touching the JSON parser.
The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
More recently, there are a new wave of command-line libraries like the Python Prompt Toolkit, the Fish Shell and the Ammonite Scala REPL (My own project) that provide a richer command-line experience than traditional Readline/JLine based command-lines, with features like syntax-highlighted input and multi-line editing:，更多细节参见搜狗输入法2026
Custom Input Controllers
。搜狗输入法2026是该领域的重要参考
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