docs: add STATUS.md with build summary and remaining work

Covers controversy risk scanner, thread detection fix, dependency
cleanup, and prioritized list of what remains for CWS submission.

Author: affaan-m

STATUS.md

@@ -0,0 +1,109 @@
+# X Algorithm Score — Project Status
+
+Last updated: February 2026
+
+## What's Built
+
+### Core Extension (MVP)
+- **Real-time tweet scoring** on x.com — content script detects the composer via MutationObserver and displays a floating score badge (0-100, S-F grade)
+- **5-component scoring engine** — Content (0-25), Media (0-20), Timing (0-15), Engagement (0-20), Risk penalty (0-30), normalized to 0-100
+- **3-tab popup** — Test (score drafts offline), Learn (8 algorithm insight cards), Settings (API key, preferences)
+- **Score overlay** — collapsible badge expands to show Suggestions, Breakdown, and Algorithm Factors tabs
+- **Claude AI deep analysis** — optional originality scoring, engagement prediction, rewrite suggestions via user's own API key
+- **Background service worker** — handles install/update, message routing, score history storage, badge updates
+
+### Controversy Risk Scanner (New)
+`src/lib/scandal-detector.ts` — pattern-based detection for content likely to trigger catastrophic algorithmic penalties.
+
+**6 detection categories:**
+| Category | Examples | Why It Matters |
+|----------|----------|----------------|
+| Offensive language | Insults, violent language, slurs | Reports = -369x multiplier |
+| Hot-button topics | Broad group generalizations, political polarization | Mass reports from targeted group |
+| Inflammatory tone | Personal attacks, excessive caps, confrontational language | Blocks/mutes = -74x each |
+| Rage bait | "cope harder", "stay mad", intentional provocation | Blocks far outweigh any reply boost |
+| Targeted attacks | Attacking named users, doxxing references, cancel calls | Mass reports + potential suspension |
+| Misinformation patterns | Conspiracy framing, false authority claims, JAQ-ing | Content moderation flags |
+
+**4 severity levels:** low (2pt penalty), medium (5pt), high (10pt), critical (20pt)
+**4 risk levels:** safe / caution / risky / dangerous
+
+**Integration:**
+- Penalty feeds into scoring engine's risk calculation (capped at 10pts of 30pt risk budget)
+- Top controversy warning surfaces in the suggestions list
+- Popup shows color-coded risk banner with icon, level label, and warning details
+- Overlay shows compact controversy alert strip in expanded view
+
+### Thread Length Detection (Bug Fix)
+Content script now counts `tweetTextarea_N` elements to detect thread length instead of hardcoding `threadLength: 1`. X uses `tweetTextarea_0`, `tweetTextarea_1`, etc. for each tweet in a thread.
+
+### Other Fixes & Cleanup
+- Removed unused dependencies (`lucide-react`, `zustand`) — declared but never imported
+- Removed all TODO comments from source (0 remaining)
+- Removed stale follower-timezone dead code block from timing calculator
+- Fixed broken placeholder screenshot references in README
+- Comprehensive README rewrite with install guide, scoring tables, project structure
+
+### Build & Packaging
+- `npm run build` — tsc + vite build (40 modules, ~460ms)
+- `npm run build:clean` — removes dist/ first
+- `npm run package` — clean build + zip for Chrome Web Store (129KB)
+- TypeScript strict mode, 0 errors
+- Manifest V3 validated, all file references verified
+
+## What Remains
+
+### High Priority (Before CWS Submission)
+- [ ] Load extension in Chrome and verify it works on x.com
+- [ ] Take 5 screenshots for Chrome Web Store listing (see `store-assets/STORE_LISTING.md`)
+- [ ] Fill in store listing placeholders (support email, website URL, GitHub repo)
+- [ ] Host privacy policy at a public URL
+- [ ] Submit to Chrome Web Store
+
+### Medium Priority
+- [ ] Upgrade Vite to 6.x when @crxjs/vite-plugin supports it (fixes esbuild dev server vulnerability — moderate severity, dev-only)
+- [ ] Persist settings changes to chrome.storage (popup Settings tab currently local state only)
+- [ ] Add score history tracking (background service worker has the handler, needs UI)
+
+### Low Priority (Post-MVP)
+- [ ] Timeline scoring — show scores on existing tweets in the feed
+- [ ] User context integration — follower count, engagement rate, Premium status
+- [ ] Thread composer — per-tweet scoring within threads
+- [ ] Optimal posting time — personalized suggestions based on follower timezones
+- [ ] Firefox and Safari support
+- [ ] A/B testing suggestions
+
+## File Map
+
+```
+src/
+├── background/index.ts           # Service worker (install, messaging, history)
+├── content/
+│   ├── index.tsx                 # Composer detection, overlay injection
+│   ├── styles.css                # Overlay animations
+│   └── components/
+│       └── ScoreOverlay.tsx      # Collapsible score badge + expanded panel
+├── lib/
+│   ├── scoring-engine.ts         # 5-component scoring + suggestions + factors
+│   ├── scandal-detector.ts       # Controversy risk scanner (6 categories)
+│   └── ai-analysis.ts            # Claude API integration
+├── popup/
+│   ├── index.html                # Popup entry
+│   ├── main.tsx                  # React mount
+│   ├── Popup.tsx                 # 3-tab UI (Test, Learn, Settings)
+│   └── styles.css                # Tailwind + custom styles
+└── types/index.ts                # All interfaces + default weights
+```
+
+## Commit History
+
+```
+b53e2c9 feat: add Controversy Risk Scanner for tweet analysis
+c8b1aa8 docs: rewrite README with full install/dev/usage guide
+de1f1ef docs: update README with packaging commands and fix broken screenshot refs
+79e5495 chore: add CWS packaging scripts and ignore zip artifacts
+494550f chore: extension session updates
+207284c docs: add INSTALL.md and sync version to 0.1.0
+6200742 docs: comprehensive README with installation guide and algorithm insights
+063a2c7 feat: initial MVP release of X Algorithm Score extension
+```