Primera fase context

src/config.py

@@ -38,10 +38,19 @@ class Settings(BaseSettings):
     temperature: float = 0.3
 
     # --- Context engine ---
-    context_max_tokens: int = 120_000
-    compaction_threshold_tokens: int = 80_000
+    model_context_window: int = 0  # 0 = use legacy fixed budget / explicit override
+    model_max_output_tokens: int = 4096
+    context_max_tokens: int = 0  # 0 = auto-budget from model window, fallback legacy 120k
+    compaction_threshold_tokens: int = 0  # 0 = derive from ratio
+    compaction_threshold_ratio: float = 0.80
+    context_reserve_ratio: float = 0.10
     artifact_summary_max_chars: int = 2000
+    knowledge_base_max_tokens: int = 30_000
     working_context_max_items: int = 20
+    tool_raw_output_max_chars: int = 2000
+    conversation_recent_raw_limit: int = 2
+    task_history_max_entries: int = 20
+    task_history_max_tokens: int = 1500
 
     # --- MCP ---
     mcp_config_path: str = ""  # Path to mcp.json; empty = legacy single-server mode
@@ -64,5 +73,32 @@ class Settings(BaseSettings):
 
     model_config = {"env_prefix": "AGENTIC_", "env_file": ".env", "extra": "ignore"}
 
+    @property
+    def reserve_tokens(self) -> int:
+        if self.model_context_window <= 0:
+            return 0
+        return max(0, int(self.model_context_window * self.context_reserve_ratio))
+
+    @property
+    def effective_context_budget(self) -> int:
+        if self.context_max_tokens > 0:
+            return self.context_max_tokens
+
+        if self.model_context_window > 0:
+            budget = (
+                self.model_context_window
+                - max(0, self.model_max_output_tokens)
+                - self.reserve_tokens
+            )
+            return max(1, budget)
+
+        return 120_000
+
+    @property
+    def effective_compaction_threshold(self) -> int:
+        if self.compaction_threshold_tokens > 0:
+            return min(self.compaction_threshold_tokens, self.effective_context_budget)
+        return max(1, int(self.effective_context_budget * self.compaction_threshold_ratio))
+
 
 settings = Settings()