What problem does it solve? Language learners need structured writing practice with detailed, actionable feedback, but ad-hoc corrections lack systematic error tracking and mastery-based difficulty. This Skill runs a complete writing session — scenario selection, composition, multi-category error analysis, and progress tracking — so every practice attempt feeds long-term learning data. ## Core Features & Use Cases - Mastery-Driven Scenario Selection: Picks formal emails, informal emails, form filling, or personal texts based on the learner's CEFR level and writing sub-skill mastery scores. - Systematic Error Analysis: Tags every issue by category (grammar, register, vocabulary, missing elements, spelling, structure) and severity (critical, moderate, minor), producing a corrected version and a scored breakdown. - Persistent Progress Tracking: Updates mistakes and mastery databases, and saves each session to a results file for later analysis by the session-analyzer skill. - Use Case: An A2 Dutch learner types /fluent-writing, receives a formal email scenario about canceling a doctor's appointment, writes their text, and gets feedback flagging register mixing and omdat-clause word order, with the errors logged for spaced repetition. ## Quick Start Type /fluent-writing to start an interactive writing practice session matched to your current level.
