## `pangram_scores_{N_pangrams}_{N_words}_{zipf_threshold}.json`

### Naming convention

| Segment | Description |
|---|---|
| `N_pangrams` | Number of unique 7-letter pangrams in the filtered word list |
| `N_words` | Total number of words in the filtered word list |
| `zipf_threshold` | Minimum Zipf frequency for inclusion - higher values mean more common words only |

### Structure

```json
{
  "<pangram>": {
    "<center_letter>": {
      "score": 123,
      "valid_words": ["word1", "word2", "..."]
    }
  }
}
```

Each pangram key maps to up to 7 center letter configurations (one per unique letter in the pangram). For each configuration:

- **`score`** - total points across all valid words; 4-letter words score 1pt, longer words score their character length, and any pangram scores an additional +7 bonus
- **`valid_words`** - all words formable using only the 7 board letters, with the center letter required in every word