fix(codex-link): isolate model transfers and widen local connection capacity

apps/desktop/assets/codex-bridge/gecis_context.py

@@ -0,0 +1,163 @@
+"""Provider-neutral history preparation. Never edits the saved Codex transcript.
+
+Inference routing and voice are not responsibilities of this module. A caller
+supplies the target window and an AITURK summarizer; subscription-only requests
+must not enter the budget preparation path.
+"""
+import copy
+import hashlib
+import json
+import threading
+from collections import OrderedDict
+
+import ozet_kopru
+
+PREFIXES = {"custom_tool_call": "ctc", "custom_tool_call_output": "ctco",
+            "function_call": "fc", "function_call_output": "fc"}
+RATIO = 0.70
+
+
+class TransferError(ValueError):
+    pass
+
+
+def encoded(value):
+    return json.dumps(value, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
+
+
+def tokens(value):
+    # Deliberately more conservative than the old 3.2 bytes/token estimate.
+    return (len(encoded(value).encode("utf-8")) + 1) // 2
+
+
+def input_budget(req, window):
+    return min(int(window * RATIO), window - max(1024, int(req.get("max_output_tokens") or 0)))
+
+
+def foreign(req):
+    for item in req.get("input") or []:
+        if not isinstance(item, dict):
+            continue
+        identity = str(item.get("id") or "")
+        want = PREFIXES.get(item.get("type"))
+        if ("chatcmpl-" in identity or "astrabridge" in identity
+                or str(item.get("encrypted_content") or "").startswith(ozet_kopru.ISARET)
+                or (want and identity and not identity.startswith(want + "_"))):
+            return True
+    return False
+
+
+def normalize(req):
+    """Repair local wrappers/IDs, retaining real OpenAI encrypted compaction.
+
+    Only foreign server references (not inline tool results) are removed. Their
+    visible summary/text, when supplied, is retained as ordinary context.
+    """
+    out = copy.deepcopy(req)
+    items = out.get("input")
+    if not isinstance(items, list):
+        return out
+    result = []
+    for item in items:
+        if not isinstance(item, dict):
+            result.append(item)
+            continue
+        encrypted = item.get("encrypted_content")
+        if item.get("type") == "compaction" and isinstance(encrypted, str) and encrypted.startswith(ozet_kopru.ISARET):
+            text = ozet_kopru.ozet_metni(item)
+            if not text:
+                raise TransferError("Eski AITURK özeti okunamadı; geçmiş değiştirilmedi.")
+            result.append(ozet_kopru._ozet_mesaji(text))
+            continue
+        identity = item.get("id")
+        if "chatcmpl-" in str(identity) and item.get("type") in ("reasoning", "item_reference"):
+            visible = [p.get("text", "") for p in item.get("summary", []) if isinstance(p, dict)]
+            if any(visible):
+                result.append(ozet_kopru._ozet_mesaji("\n".join(visible)))
+            continue
+        prefix = PREFIXES.get(item.get("type"))
+        if prefix and isinstance(identity, str) and identity and not identity.startswith(prefix + "_"):
+            item["id"] = prefix + "_" + identity.split("_", 1)[-1]
+        result.append(item)
+    out["input"] = result
+    return out
+
+
+def split_history(items, keep_users=2):
+    """Keep the last two user turns and complete tool pairs; never split a call.
+
+    System/developer items are kept verbatim regardless of their position.
+    """
+    users = [i for i, x in enumerate(items) if isinstance(x, dict) and x.get("role") == "user"]
+    cut = users[-keep_users] if len(users) >= keep_users else (users[-1] if users else len(items))
+    # Some clients put a user/hook message between a call and its result.
+    while cut:
+        tail_calls = {x.get("call_id") for x in items[cut:] if isinstance(x, dict) and x.get("call_id")}
+        earlier = [i for i, x in enumerate(items[:cut]) if isinstance(x, dict) and x.get("call_id") in tail_calls]
+        if not earlier:
+            break
+        cut = min(earlier)
+    protected, old, recent = [], [], []
+    for i, item in enumerate(items):
+        if isinstance(item, dict) and item.get("role") in ("system", "developer"):
+            protected.append(item)
+        elif i < cut:
+            old.append(item)
+        else:
+            recent.append(item)
+    return protected, old, recent
+
+
+class Preparer:
+    def __init__(self):
+        self.cache = OrderedDict()
+        self.lock = threading.Lock()
+
+    def prepare(self, request, window, summarize, scope="", force=False):
+        """Summarize old history to fit 70%, leaving the original untouched.
+
+        summarize(text, max_tokens) must return a completed semantic summary or
+        raise. Tool execution is forbidden for that separate model request.
+        Cache keys include the caller scope, exact history and available budget.
+        """
+        req = normalize(request)
+        window = int(window)
+        if window < 1024:
+            raise TransferError("Hedef modelin bağlam kapasitesi doğrulanamadı.")
+        limit = input_budget(req, window)
+        if not force and tokens(req) <= limit:
+            return req
+        protected, old, recent = split_history(req.get("input") or [])
+        base = dict(req, input=protected + recent)
+        available = limit - tokens(base) - 256
+        # Preserve the last user turn even if keeping two turns is too expensive.
+        if available < 1024 or not old:
+            protected, old, recent = split_history(req.get("input") or [], keep_users=1)
+            base = dict(req, input=protected + recent)
+            available = limit - tokens(base) - 256
+        if available < 512 or not old:
+            raise TransferError("Son mesaj ve zorunlu talimatlar hedefe sığmıyor; geçmiş korundu, modele eksik içerik gönderilmedi.")
+        # Encrypted items must be rendered by their owner, never summarized as ciphertext.
+        if any(isinstance(x, dict) and x.get("encrypted_content") for x in old):
+            raise TransferError("Şifreli geçmiş önce sahibi tarafından okunabilir özete çevrilmeli.")
+        source = encoded(old)
+        budget = min(12000, max(512, available // 2))
+        key = hashlib.sha256((scope + str(budget) + source).encode()).hexdigest()
+        with self.lock:
+            summary = self.cache.get(key)
+        if summary is None:
+            summary = summarize(source, budget)
+            if not isinstance(summary, str) or len(summary.strip()) < 80:
+                raise TransferError("AITURK özeti tamamlanamadı; eski geçmiş korundu.")
+        candidate = dict(req, input=protected + [ozet_kopru._ozet_mesaji(summary)] + recent)
+        if tokens(candidate) > limit:
+            raise TransferError("Hazırlanan özet hedef bütçesine sığmadı; eski geçmiş korundu.")
+        with self.lock:
+            self.cache[key] = summary
+            self.cache.move_to_end(key)
+            while len(self.cache) > 32:
+                self.cache.popitem(last=False)
+        return candidate
+
+
+PREPARER = Preparer()