u/imanateater

do we know when exactly fable cuts off from the subs?

UpNextTV.app - tv show episode tracker app for ios

https://docs.expo.dev/router/advanced/native-tabs/#bottom-accessory

Got bottom accessory to work with the latest Expo 56, although I did have to patch it to get it to work properly with LegendList. (Patch code here)

For my fitness app: Fitloop ( r/fitloop )

Had Opus audit all my Fable chats, and re-ran some prompts against Opus 4.8, from the same code commits, to distill an instruction set from diffing / pattern matching.

I also folded in the findings this author had: https://simonwillison.net/2026/Jun/11/fable-is-relentlessly-proactive/

Download the file and use it like this:

V2 Latest: https://github.com/sgup/ai/blob/main/Fable5.md
(A/B tested with ultrathink, findings here)

# Add this line to CLAUDE.md (replace the path):
@~/path/to/Fable5.md

# Then, run with this to add it to system prompt too
claude --append-system-prompt-file ~/path/to/Fable5.md

# You can make it an alias so it's easier to start, add to .zshrc:
alias ccfable='claude --append-system-prompt-file ~/path/to/Fable5.md'

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V1: https://github.com/sgup/ai/blob/e85e2d64285b193f127d10cd348bb1f75033ec59/Fable5.md (Tests show improved execution)

Obviously won't be the true & almighty Fable, but I'm curious about your mileage. So far it seems to make Opus smarter and more proactive for me. Even if it improves output by a little bit, it would be worth it.

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If you've tried something similar, it would be interesting to compare notes.