Create Grammar Tree

• normalized topic label
• original source form when normalization changed it
• rule summary
• core pattern, form, or trigger words when applicable
• example when available
• provisional or verified CEFR level
• daily CEFR file path
• cumulative CEFR file path

16. Group entries by CEFR level and create one dated file per level at: grammar/<CEFR>/daily/grammar-<CEFR>-YYYY-MM-DD.md
17. Update the cumulative CEFR file for each level at: grammar/<CEFR>/grammar-<CEFR>.md
18. If a dated target file already exists, do not overwrite it unless the user explicitly asks to regenerate it.
19. When updating the cumulative CEFR file, add only new normalized topics for that level. Do not duplicate entries that are already present.
20. After creating, regenerating, or skipping output files, append a summary entry to ../CHANGELOG.md by running: ../scripts/append-skill-log.sh "create_grammar_tree" "<language>" "<summary>"

CEFR Lookup Rules

• Use web search for each grammar topic because level labels are source-dependent and can vary across teaching frameworks.
• Prefer grammar syllabi, curriculum guides, or language-learning sources that explicitly publish CEFR-tagged grammar coverage.
• If multiple sources disagree, choose the level supported by the strongest explicit source and briefly note the ambiguity.
• Make it clear when a CEFR level is inferred from partial evidence rather than directly labeled by the source.

Output Structure

Each generated dated CEFR file must include:

• A title with the CEFR level and date
• Source Note
• Level Summary
• One section per grammar domain present in that file

Each cumulative CEFR file must include:

• A title with the CEFR level
• Level Summary
• Source Files
• One section per grammar domain present in that level

Each grammar entry should be rendered as a compact, readable block that includes:

• the topic label
• the grammar domain
• a short rule summary
• the relevant pattern or forms
• a short example when useful
• a short CEFR note with the source or confidence

The rewritten daily note must include:

• the original title with the date
• Raw Capture
• Normalized Grammar Tree
• one section per grammar domain present in the source

Generation Rules

• Cover every usable grammar point from the source note. Do not silently drop entries.
• Cover every usable grammar point in both the rewritten daily note and the CEFR-split files.
• Keep the per-day CEFR files under grammar/<CEFR>/daily/.
• Keep the cumulative CEFR files at grammar/<CEFR>/grammar-<CEFR>.md.
• When a new topic belongs to a level, update both the per-day file and the cumulative file for that level.
• Keep entries grouped by grammar domain inside each CEFR file.
• Keep entries grouped by grammar domain inside the rewritten daily note as well.
• Preserve the original source wording when the note contains a named grammar topic, but still normalize it into a clean topic label.
• Do not fabricate rule details or examples that are not valid for the topic.
• When the source note is empty or missing, report that clearly and do not create misleading grammar files or a misleading normalized rewrite.
• The changelog summary should include the target date, the source note path, whether the daily note was rewritten, and which CEFR files were created, regenerated, updated, or skipped.