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Changelog

2503.26-alpha - 2026-03-25

  • Refactored monolithic sentence_generation.py into a pgp/ package (types, parser, web, cli).
  • Removed hardcoded default lexicon seeds — lexicon.json is now the sole source of vocabulary.
  • Fixed POS-guessing mutation bug: _guess_pos no longer permanently writes inferred tags into the lexicon, preventing state pollution across requests.
  • Fixed unused return values in recursive-descent parse methods (_parse_np return signature simplified).
  • Added token_tags field to /api/parse response — each token carries its word, POS, human-readable label, and a guessed flag.
  • Added /api/health endpoint returning server status and lexicon size.
  • Added input length validation (max 500 characters).
  • Security headers added to all responses: X-Content-Type-Options, X-Frame-Options, Referrer-Policy.
  • Internal server errors no longer leak exception details to API clients; full traces go to the server log.
  • Added structured logging via Python's logging module throughout the pgp/ package.
  • Flask app now uses an app-factory pattern (create_app()), decoupling it from module-level state.
  • Expanded lexicon.json from ~50 to ~150 entries across all POS categories.
  • Pinned all dependency version constraints in requirements.txt.
  • UI: token chips with per-POS color coding and part-of-speech labels.
  • UI: parse history panel — last 8 parses with one-click restore.
  • UI: loading spinner on the Parse button during in-flight requests.
  • UI: copy-to-clipboard buttons on diagram text blocks.
  • UI: placeholder graphics in diagram boxes before first parse.
  • UI: heuristically guessed tokens marked with a ? badge and explanatory note.

2403.26-alpha - 2026-03-24

  • Added click-to-expand modal for diagram images with smooth animations.
  • Added image hover effects and keyboard navigation (Escape to close).
  • Added mobile-friendly fullscreen diagram viewing.

1903.26-alpha - 2026-03-19

  • Added support for adverbs in clauses.
  • Added support for prepositional phrases in noun and sentence contexts.
  • Added support for compound clauses joined by and and or.
  • Added external JSON lexicon loading from lexicon.json.
  • Added Flask frontend and parse API endpoint.
  • Added server-side PNG rendering for original and reduced diagrams.
  • Added project documentation and versioned release notes.