JiRackPyTorch_GPT5_class_1b_v2.py

# Copyright (c) 2025 CMS Manhattan
# All rights reserved.
# Author: Konstantin Vladimirovich Grabko
# Email: grabko@cmsmanhattan.com
# Phone: +1(516)777-0945
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
# Additional terms:
# Any commercial use or distribution of this software or derivative works
# requires explicit written permission from the copyright holder.

import torch
import torch.nn as nn
import torch.nn.functional as F
import math

# --- ВАШИ НАСТРОЙКИ (ВОССТАНОВЛЕНЫ) ---
VOCAB_SIZE = 50257
MODEL_DIM = 2048
NUM_HEADS = 32
NUM_LAYERS = 16
MAX_SEQ_LEN = 2048  
FFN_HIDDEN_DIM = MODEL_DIM * 4
HEAD_DIM = MODEL_DIM // NUM_HEADS
EPSILON = 1e-6
WINDOW_SIZE = 512

class RMSNorm(nn.Module):
    def __init__(self, dim, eps=EPSILON):
        super().__init__()
        self.eps = eps
        self.weight = nn.Parameter(torch.ones(dim))
    def forward(self, x):
        return (x * torch.rsqrt(x.pow(2).mean(-1, keepdim=True) + self.eps)) * self.weight

def precompute_freqs_cis(dim, seq_len, theta=10000.0):
    freqs = 1.0 / (theta ** (torch.arange(0, dim, 2)[: (dim // 2)].float() / dim))
    t = torch.arange(seq_len)
    freqs = torch.outer(t, freqs).float()
    return torch.polar(torch.ones_like(freqs), freqs)

def apply_rotary_emb(xq, xk, freqs_cis):
    # Исправлено для устранения UserWarning
    xq_ = torch.view_as_complex(xq.float().reshape(*xq.shape[:-1], -1, 2))
    xk_ = torch.view_as_complex(xk.float().reshape(*xk.shape[:-1], -1, 2))
    freqs_cis = freqs_cis.view(1, xq_.size(1), 1, xq_.size(3))
    xq_out = torch.view_as_real(xq_ * freqs_cis).flatten(3)
    xk_out = torch.view_as_real(xk_ * freqs_cis).flatten(3)
    return xq_out.type_as(xq), xk_out.type_as(xk)

class MultiHeadAttention(nn.Module):
    def __init__(self):
        super().__init__()
        self.wq = nn.Linear(MODEL_DIM, MODEL_DIM, bias=False)
        self.wk = nn.Linear(MODEL_DIM, MODEL_DIM, bias=False)
        self.wv = nn.Linear(MODEL_DIM, MODEL_DIM, bias=False)
        self.wo = nn.Linear(MODEL_DIM, MODEL_DIM, bias=False)

    def forward(self, x, freqs_cis, past_kv=None):
        b, t, _ = x.shape
        q, k, v = self.wq(x), self.wk(x), self.wv(x)
        q = q.view(b, t, NUM_HEADS, HEAD_DIM)
        k = k.view(b, t, NUM_HEADS, HEAD_DIM)
        v = v.view(b, t, NUM_HEADS, HEAD_DIM)
        
        q, k = apply_rotary_emb(q, k, freqs_cis[:t])
        
        if past_kv is not None:
            pk, pv = past_kv
            k = torch.cat([pk, k], dim=1)
            v = torch.cat([pv, v], dim=1)
            if k.size(1) > WINDOW_SIZE:
                k, v = k[:, -WINDOW_SIZE:], v[:, -WINDOW_SIZE:]
        
        current_kv = (k, v)
        q, k, v = q.transpose(1, 2), k.transpose(1, 2), v.transpose(1, 2)
        out = F.scaled_dot_product_attention(q, k, v, is_causal=True)
        return self.wo(out.transpose(1, 2).contiguous().view(b, t, MODEL_DIM)), current_kv

class SwiGLU(nn.Module):
    def __init__(self):
        super().__init__()
        self.w1 = nn.Linear(MODEL_DIM, FFN_HIDDEN_DIM, bias=False)
        self.w2 = nn.Linear(FFN_HIDDEN_DIM, MODEL_DIM, bias=False)
        self.w3 = nn.Linear(MODEL_DIM, FFN_HIDDEN_DIM, bias=False)
    def forward(self, x):
        return self.w2(F.silu(self.w1(x)) * self.w3(x))

class JiRackPyTorch(nn.Module):
    def __init__(self):
        super().__init__()
        self.token_emb = nn.Embedding(VOCAB_SIZE, MODEL_DIM)
        self.blocks = nn.ModuleList([nn.ModuleDict({
            'norm1': RMSNorm(MODEL_DIM),
            'attn': MultiHeadAttention(),
            'norm2': RMSNorm(MODEL_DIM),
            'ffn': SwiGLU()
        }) for _ in range(NUM_LAYERS)])
        self.norm_f = RMSNorm(MODEL_DIM)
        self.head = nn.Linear(MODEL_DIM, VOCAB_SIZE, bias=False)
        self.head.weight = self.token_emb.weight 
        
        self.register_buffer("freqs_cis", precompute_freqs_cis(HEAD_DIM, MAX_SEQ_LEN * 2))
        
        signature = "Author: Konstantin Vladimirovich Grabko (CMS Manhattan) 2025"
        self.register_buffer("proof_of_authorship", torch.tensor([ord(c) for c in signature], dtype=torch.uint8))

    def get_author_info(self):
        return "".join([chr(c) for c in self.proof_of_authorship.tolist()])

    def forward(self, idx, targets=None, past_kv=None):
        x = self.token_emb(idx)
        new_kvs = []
        for i, block in enumerate(self.blocks):
            h, kv = block['attn'](block['norm1'](x), self.freqs_cis, past_kv[i] if past_kv else None)
            x = x + h
            x = x + block['ffn'](block['norm2'](x))
            new_kvs.append(kv)
        logits = self.head(self.norm_f(x))
        if targets is not None:
            loss = F.cross_entropy(logits.view(-1, VOCAB_SIZE), targets.view(-1))
            return logits, loss, new_kvs
        return logits, new_kvs