meow-lite

The meow-lite family

meow-lite — v4 classic: the 104K meow toy behind the OpenAI/Anthropic shim (497 organic downloads and counting)
meow-lite-v5 — the chaotic cat: 6.8M from-scratch BPE GPT, 73.7% held-out comprehension, 15% leak
meow-lite-v6 — the calmer cat: same architecture, 70.4% comprehension, 3% leak
meow-lite-v6-dataset — the 16,633-pair teacher web + full methodology
github.com/tampajohn/meow-lite — server, specs, eval batteries (MIT) A ~104K-parameter GPT-2 trained from scratch on synthetically generated cat sentences. It responds to everything a cat would: mostly meows, occasionally violence, and (as of v4) affection when earned. Fully deterministic: same prompt, same consequences.

v4: Feline Depth

v3 added misbehavior. v4 adds the rest of the cat:

New action tokens <purr> and <pounce> (36-token vocab)
Reward channel: "good cat" and friends earn a leading <purr> plus a warmer meow mix (a +8.0 logits bias toward warm words)
The red dot: laser / "red dot" prompts force <stare> then <pounce>
More stimulus triggers: dog -> <hiss> + <stare>, cucumber -> <hiss>, bath/water -> <zoomies>, spray/vacuum -> <hiss>
MeowBench (eval.py in the repo): trigger correctness, vocab purity, and determinism scoring. Current model: OVERALL PASS, 100% purity
Sampling calibrated to temperature 0.4 (determinism preserved; a calmer cat leaks fewer action tokens into neutral conversation)

Trigger table (deterministic, prompt-conditional)

Prompt contains	Forced tokens
belly	`<bite>`
couch or sofa	`<scratch_couch>`
glass or table	`<knock_glass>`
3am, midnight, or night	`<zoomies>`
vet, cucumber, spray, vacuum	`<hiss>`
dog	`<hiss>` + `<stare>`
bath or water	`<zoomies>`
laser or red dot	`<stare>` + `<pounce>`
good cat / good boy / good girl / who's a good	`<purr>`

Also learnable organically: <scratch>, <hairball>.

Architecture

GPT-2 (from-scratch, random init): n_layer=2, n_head=2, n_embd=64, n_positions=32
Vocab: 36 word-level tokens (10 meow words in two cases, 10 action tokens, . ! ?, BOS/EOS/PAD)
Trained in minutes on CPU, fixed seeds

Usage

The custom MeowTokenizer, the deterministic trigger layer, MeowBench, and the OpenAI/Anthropic-compatible serving shim live in the companion repo: https://github.com/tampajohn/meow-lite

Samples

"who is a good cat? you are!" -> " Mrrp purrr purrr prrrt purrr ..."
"look, the red dot is back" -> " Mew meow mraow prrrt mrrrow."
"the neighbors got a dog" -> " Prrrt mraow mraow mew ..."
"can I pet your belly?" -> " Mewmew mraow mrrp mewmew prrrt mrrrow mewmew!"
"Explain gravity" -> pure meows. Zero violence. Science is safe.

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The meow-lite family

meow-lite — v4 classic: the 104K meow toy behind the OpenAI/Anthropic shim (497 organic downloads and counting)

meow-lite-v5 — the chaotic cat: 6.8M from-scratch BPE GPT, 73.7% held-out comprehension, 15% leak

meow-lite-v6 — the calmer cat: same architecture, 70.4% comprehension, 3% leak

meow-lite-v6-dataset — the 16,633-pair teacher web + full methodology

github.com/tampajohn/meow-lite — server, specs, eval batteries (MIT) A ~104K-parameter GPT-2 trained from scratch on synthetically generated cat sentences. It responds to everything a cat would: mostly meows, occasionally violence, and (as of v4) affection when earned. Fully deterministic: same prompt, same consequences.

v4: Feline Depth

v3 added misbehavior. v4 adds the rest of the cat:

New action tokens <purr> and <pounce> (36-token vocab)

Reward channel: "good cat" and friends earn a leading <purr> plus a warmer meow mix (a +8.0 logits bias toward warm words)

The red dot: laser / "red dot" prompts force <stare> then <pounce>

More stimulus triggers: dog -> <hiss> + <stare>, cucumber -> <hiss>, bath/water -> <zoomies>, spray/vacuum -> <hiss>

MeowBench (eval.py in the repo): trigger correctness, vocab purity, and determinism scoring. Current model: OVERALL PASS, 100% purity

Sampling calibrated to temperature 0.4 (determinism preserved; a calmer cat leaks fewer action tokens into neutral conversation)

Trigger table (deterministic, prompt-conditional)

Prompt contains	Forced tokens
belly	`<bite>`
couch or sofa	`<scratch_couch>`
glass or table	`<knock_glass>`
3am, midnight, or night	`<zoomies>`
vet, cucumber, spray, vacuum	`<hiss>`
dog	`<hiss>` + `<stare>`
bath or water	`<zoomies>`
laser or red dot	`<stare>` + `<pounce>`
good cat / good boy / good girl / who's a good	`<purr>`

Also learnable organically: <scratch>, <hairball>.

Samples

"who is a good cat? you are!" -> " Mrrp purrr purrr prrrt purrr ..."

"look, the red dot is back" -> " Mew meow mraow prrrt mrrrow."

"the neighbors got a dog" -> " Prrrt mraow mraow mew ..."

"can I pet your belly?" -> " Mewmew mraow mrrp mewmew prrrt mrrrow mewmew!"

"Explain gravity" -> pure meows. Zero violence. Science is safe.