2026-03-25: Writing Style Port

What Changed

• extracted the writing-style analysis engine into src/server/plugins/ports/writing-style.ts
• added a thin GET /api/v1/plugins/writing-style route with results, analyze, and profile actions
• added the codex-side /app/writing analyzer page
• added unit coverage for readability, tone classification, syllable counting, and complexity scoring
• updated plugin metadata so Writing Style is a real codex plugin page instead of widget-only metadata

Why It Matters

This is the first pure-analysis feature in the codex analysis parity batch.

It gives the convergence program a second kind of reference port after:

• action plugins like Flashcard Maker
• media plugins like Voice-to-Memory
• importer plugins like Kindle Importer
• AI-assisted analysis like Contradiction Finder

Writing Style proves codex can also absorb rich local analysis logic with no external provider dependency.

Remaining Gaps

• the rest of the analysis batch still needs porting: knowledge-gaps, topic-evolution, sentiment-timeline, and mind-map-generator
• frain's shared vector/clustering extraction is still not visible on the fetched remote branch, so later analysis ports may still need local re-extraction
• the current page is a focused codex version of the analyzer; deeper charting polish can still improve over time