Koukyosyumei

Koukyosyumei/h5i-db

Skill Claude CodeCodex

Use when working with an h5i-db database — an embedded, versioned time-series database and event-driven backtesting engine for quant research, driven by the h5i-db CLI or the h5idb Python package. Covers creating a database and loading Parquet or CSV tick data, orienting in an existing one, querying it (SQL, ASOF…

Koukyosyumei/h5i-ctx2img

Skill Claude CodeCodex

Cut context tokens by rendering it as images. ctx2img paint turns any text-shaped input (a repo, a directory, a file, markdown, stdin) into dense images that carry the full text at 60-75% fewer tokens, with stable handles and a verbatim factsheet; ctx2img read recovers guaranteed-exact text. Use before ingesting any…