diff --git a/AGENT.common.md b/AGENT.common.md
index 64fb93c..87b8b5e 100644
--- a/AGENT.common.md
+++ b/AGENT.common.md
@@ -24,3 +24,11 @@ Formatting:
 ## Rules Maintenance (MUST)
 - Changes to agent rule files: prefer compressed, machine-readable edits.
 - Keep updates minimal and non-duplicative: merge overlapping points, remove redundancy, preserve intent.
+
+## Memory Log (MUST)
+
+TRIGGER_READ: session_start → call `read_graph` OR `search_nodes(<topic>)`
+TRIGGER_WRITE: significant_change_complete → call `create_entities` OR `add_observations`
+KEY_FORMAT: `<project-prefix>/<entityType-short>/<name>`; prefix defined in project AGENTS.md
+TOPIC_ISOLATION: one entityType per entity; never mix topics in one entity
+ALLOWED_TYPES: architecture | mcp_tool | decision | bug | config | task_log
diff --git a/AGENTS.md b/AGENTS.md
index 4e60d9b..b177cb3 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -56,6 +56,23 @@ dotnet build
 
 ---
 
+## Memory Log (MUST)
+
+PREFIX: `lazybear/`
+
+| entityType     | scope                    | key example                   |
+|----------------|--------------------------|-------------------------------|
+| `architecture` | структура, хостинг, SDK  | `lazybear/arch/mcp-transport` |
+| `mcp_tool`     | инструменты MCP          | `lazybear/tool/get-price`     |
+| `decision`     | решения, ADR             | `lazybear/decision/transport` |
+| `bug`          | ошибки, баги             | `lazybear/bug/auth-fail`      |
+| `config`       | конфигурация             | `lazybear/config/appsettings` |
+| `task_log`     | прогресс задач           | `lazybear/task/refactor-tools`|
+
+REF: [AGENT.common.md](AGENT.common.md) → Memory Log
+
+---
+
 ## Правила для машин (MACHINE-FIRST)
 
 ### Обязательные правила (MUST)