Spellcaster fails to parse LLM output

Running spellcaster with sonnet or haiku on an [some markdown docs](https://docs.reboot.dev/) does not seem to work; I didn't try to debug exactly what is going on, but I've included the full stdout/stderr output (with verbose logging) below.

```
$ spellcaster --directory $HOME/rbt/respect/reboot/documentation/docs/develop -m 10 -l claude-3-haiku-20240307 -p Reboot > output-haiku.log 2>&1
```

[output-haiku.log](https://github.com/user-attachments/files/17622661/output-haiku.log)