Claude API Control.
Let's Roll.
A control surface for the Claude API. Enter your prompts and context, hit RUN, tweak controls and compare the takes. Monitor tokens, cost, round-trip time and see output comparisons side-by-side.
In a world where inference is going to mean more than ever, get your evals covered with Fluffy Parrot.
Tweak. RUN. Compare. Repeat.
Dial in the knobs, hit RUN, and watch the tokens land. Then put two takes next to each other and read the diff instead of guessing which temperature was better.
- Every run keeps its own tab and cost
- Load any past run's settings back into the knobs
- Diff two outputs side by side
- Export the exact settings as JSON
Every parameter on the UI.
No dropdowns. No settings dialog buried three menus deep. The whole Claude API laid out as knobs and toggles you can reach quickly and easily.
Over-engineered on purpose.
An AI app built like an instrument. Free and open source.
No telemetry phones home. Your API keys live on your mac.
Imagined field reports
Unverified transmissions from people who should know better.
I have not read the docs in three weeks. I just turn TOP·K until it feels right.
Finally, a Claude client that respects that I have opinions about max_tokens.
The knobs have detents. The detents have detents. I am unwell.
Dropped temperature from 1.0 to 0.7 by ear. My PM said the writing got better. I said prompt engineering.
Boots faster than my actual synth and costs less than one Eurorack module.
I compare two runs side by side now instead of trusting vibes. Reluctantly an improvement.
Pushed TOP·K to 480 and the knob glowed orange like it was judging me. It was.
The LED goes amber while it streams. I have started matching my breathing to it.
My API key lives in the Keychain, not in some startup database. Apparently this is novel.
Everything is mono and set in caps. I feel like I am operating a submarine. Affirmative.
Double-click a knob and it snaps home. I do this for fun now. I am 34.
Three position model knob. HAIKU, SONNET, OPUS. No dropdown. No mercy.
It exports every run as JSON. My prompt research is now a folder of 200 files. Thriving.
The system prompt sits on a tiny green LCD with scanlines. Purely decorative. Absolutely essential.
Went looking for the library that draws the knobs. There is no library. Someone drew all of this by hand.
Does turning the knobs make the output better? Unclear. Does it make me better? Yes.
I have not read the docs in three weeks. I just turn TOP·K until it feels right.
Dropped temperature from 1.0 to 0.7 by ear. My PM said the writing got better. I said prompt engineering.
Pushed TOP·K to 480 and the knob glowed orange like it was judging me. It was.
Everything is mono and set in caps. I feel like I am operating a submarine. Affirmative.
It exports every run as JSON. My prompt research is now a folder of 200 files. Thriving.
Went looking for the library that draws the knobs. There is no library. Someone drew all of this by hand.
Finally, a Claude client that respects that I have opinions about max_tokens.
Boots faster than my actual synth and costs less than one Eurorack module.
The LED goes amber while it streams. I have started matching my breathing to it.
Double-click a knob and it snaps home. I do this for fun now. I am 34.
The system prompt sits on a tiny green LCD with scanlines. Purely decorative. Absolutely essential.
The knobs have detents. The detents have detents. I am unwell.
I compare two runs side by side now instead of trusting vibes. Reluctantly an improvement.
My API key lives in the Keychain, not in some startup database. Apparently this is novel.
Three position model knob. HAIKU, SONNET, OPUS. No dropdown. No mercy.
Does turning the knobs make the output better? Unclear. Does it make me better? Yes.
AI fine tuning with a twist.
A precision control surface for the Claude API.
macOS 13+ · Apple silicon · bring your own API key