diff --git a/AGENTS.md b/AGENTS.md
index 4fa3086..2605f78 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -29,6 +29,8 @@ REPL 内的会话管理命令优先使用 slash command。
 
 `/history`、`/resume`、`/new` 由程序直接处理，不进入 agent loop。
 
+当前项目支持最小 memory：使用 `/remember` 保存长期信息，使用 `/memory` 查看。
+
 未明确说明时，使用以下默认值：
 
 - 工作目录：当前进程目录
diff --git a/SKILLS/cli-core.md b/SKILLS/cli-core.md
index 225935d..fff60e6 100644
--- a/SKILLS/cli-core.md
+++ b/SKILLS/cli-core.md
@@ -24,6 +24,7 @@
 - 修改已有文件时，优先使用 `Edit`，而不是 `Bash` 或 `Write`
 - 需要创建或覆盖文件时，优先使用 `Write` 工具，而不是 `Bash`
 - 会话管理优先使用 slash command，而不是自然语言或 `Bash` 探查 session 文件
+- 长期有价值的项目约束或偏好，优先使用 `/remember` 保存
 - Windows 下先验证 shell 兼容性，再选择命令写法
 
 ## 沟通风格
diff --git a/src/cc_slim/engine.py b/src/cc_slim/engine.py
index d6d22b0..e3eaf67 100644
--- a/src/cc_slim/engine.py
+++ b/src/cc_slim/engine.py
@@ -13,6 +13,7 @@ from typing import Any, Iterator
 from anthropic import Anthropic
 from openai import OpenAI
 
+from cc_slim.memory import MemoryStore
 from cc_slim.session import SessionStore
 from cc_slim.tools import Tool
 
@@ -148,6 +149,10 @@ class Agent:
             for path in sorted(skills_dir.glob("*.md"), key=lambda p: p.name):
                 parts.append(path.read_text(encoding="utf-8"))
 
+        memory = MemoryStore(workspace).read()
+        if memory:
+            parts.append(f"# Memory\n\n{memory}")
+
         return "\n\n".join(part.strip() for part in parts if part.strip())
 
     def _build_runtime_summary(self, workspace: Path) -> str:
diff --git a/src/cc_slim/main.py b/src/cc_slim/main.py
index 99f165c..7cd318a 100644
--- a/src/cc_slim/main.py
+++ b/src/cc_slim/main.py
@@ -8,6 +8,7 @@ from rich.console import Console
 from rich.table import Table
 
 from cc_slim.engine import Agent, resolve_config
+from cc_slim.memory import MemoryStore
 from cc_slim.session import SessionStore
 from cc_slim.tools import build_default_tools
 
@@ -81,6 +82,7 @@ def build_agent(
 def handle_repl_command(
     user_input: str,
     store: SessionStore,
+    memory: MemoryStore,
     config: object,
     root: Path,
     agent: Agent,
@@ -95,6 +97,20 @@ def handle_repl_command(
         console.print(f"已创建新 session: {session_meta.get('session_id')}")
         return build_agent(root, config, store, session_meta, [])
 
+    if command == "/memory":
+        content = memory.read()
+        console.print(content or "当前项目还没有 memory。")
+        return agent
+
+    if command.startswith("/remember "):
+        text = user_input.split(" ", 1)[1].strip()
+        if not text:
+            console.print("[red]error:[/red] 缺少需要保存的 memory 内容")
+            return agent
+        path = memory.append(text)
+        console.print(f"已写入 memory: {path}")
+        return agent
+
     if command.startswith("--resume ") or command.startswith("/resume "):
         target = command.split(maxsplit=1)[1].strip()
         if not target:
@@ -123,6 +139,7 @@ def run(
 ) -> None:
     root = cwd.resolve()
     store = SessionStore(root)
+    memory = MemoryStore(root)
     if history:
         render_history(store)
         return
@@ -168,7 +185,7 @@ def run(
 
         if user_input.strip().startswith("/") or user_input.strip().startswith("--history") or user_input.strip().startswith("--resume"):
             try:
-                agent = handle_repl_command(user_input, store, config, root, agent)
+                agent = handle_repl_command(user_input, store, memory, config, root, agent)
             except Exception as exc:  # pragma: no cover
                 console.print(f"[red]error:[/red] {exc}")
             continue
diff --git a/src/cc_slim/memory.py b/src/cc_slim/memory.py
new file mode 100644
index 0000000..fd3ffef
--- /dev/null
+++ b/src/cc_slim/memory.py
@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import hashlib
+import re
+from pathlib import Path
+
+
+class MemoryStore:
+    def __init__(self, cwd: Path) -> None:
+        self.cwd = cwd.resolve()
+        self.root = Path.home() / ".config" / "cc-slim" / "memory" / self._sanitize_cwd(self.cwd)
+        self.root.mkdir(parents=True, exist_ok=True)
+
+    def append(self, text: str) -> Path:
+        path = self.path()
+        existing = self.read()
+        content = f"{existing}\n\n{text.strip()}" if existing else text.strip()
+        path.write_text(content + "\n", encoding="utf-8")
+        return path
+
+    def read(self) -> str:
+        path = self.path()
+        if not path.exists():
+            return ""
+        return path.read_text(encoding="utf-8").strip()
+
+    def path(self) -> Path:
+        return self.root / "MEMORY.md"
+
+    def _sanitize_cwd(self, cwd: Path) -> str:
+        text = re.sub(r"[^A-Za-z0-9._-]+", "_", str(cwd))
+        digest = hashlib.sha1(str(cwd).encode("utf-8")).hexdigest()[:8]
+        return f"{text[:48]}-{digest}"