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cron_explain — Translate a cron expression into plain English, list upcoming run times in a timezone, and report the gotchas that make schedules misfire: d

cron_build — Convert an English schedule description into a cron expression. Rule-based, not a language model: it refuses phrases outside its grammar rat

json_to_types — Convert a JSON sample into TypeScript interfaces and a matching Zod schema. Merges EVERY array element into a union rather than typing from

regex_explain — Explain a regular expression in plain English and detect catastrophic backtracking. ALWAYS call this before putting a pattern where it will

timezone_convert — Convert a wall-clock time between IANA zones. Returns null when the local time DOES NOT EXIST because a daylight-saving jump skipped it, and

color_analyse — Convert a colour between hex, RGB, HSL, OKLCH, CMYK, and CSS names, and derive complementary, analogous, triadic, split-complementary and mo

vocab_draw — Draw words-in-context practice questions from a curated bank. The response deliberately contains NO answers and NO explanations, so you can

vocab_check — Mark an attempt and get the teaching content: whether it was right, which option was correct, why it fits, and why EVERY distractor fails. R