X Thread Rewrite

Workflow

Rewrite for X:
- [ ] Step 1: Load spine + chosen hook + voice-profile
- [ ] Step 2: Score translatability: if >60% of claims score ≤2, emit VERDICT: skip X, halt
- [ ] Step 3: For each of 3 variants (short 3-5, medium 6-8, long 9-12):
    - Pick spine claims by translatability (short = only 5s; medium = 4s and 5s; long = full spine)
    - Write each tweet ≤280 chars, one claim per tweet
    - Preserve paper attributions verbatim
    - End with link tweet: `Full essay: {substack-url}`
- [ ] Step 4: No hashtags, no emoji, no numbering
- [ ] Step 5: Voice-check pass

Output format