update lexicon

Cargo.toml

@@ -19,3 +19,4 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 anyhow = "1.0"
 dirs = "5.0"
+chrono = "0.4.44"

docs/DOCS.md

@@ -2,32 +2,72 @@
 
 ## Overview
 
-MCP server for AI memory. Reads/writes core.md and memory.md. Nothing more.
+MCP server for AI memory. Reads/writes core.json and memory/*.json in atproto lexicon record format.
 
 ## Design
 
 - AI decides, tool records
 - File I/O only, no database
 - 4 MCP tools: read_core, read_memory, save_memory, compress
-- Simple, unbreakable, long-lasting
+- Storage format: atproto getRecord JSON
 
 ## MCP Tools
 
 | Tool | Args | Description |
 |------|------|-------------|
-| read_core | none | Returns core.md content |
+| read_core | none | Returns core.json record |
-| read_memory | none | Returns memory.md content |
+| read_memory | none | Returns latest memory record |
-| save_memory | content: string | Overwrites memory.md |
+| save_memory | content: string | Creates new memory record (version increments) |
-| compress | conversation: string | Reads memory.md + conversation, writes compressed result to memory.md |
+| compress | conversation: string | Same as save_memory (AI compresses before calling) |
 
 compress note: AI decides what to keep/discard. Tool just writes.
 
 ## Data
 
 ```
-~/.config/aigpt/
+~/Library/Application Support/ai.syui.gpt/   (macOS)
-├── core.md      ← read only (identity, settings)
+~/.local/share/ai.syui.gpt/                  (Linux)
-└── memory.md    ← read/write (memories, grows over time)
+├── core.json           ← read only, rkey: self
+└── memory/
+    ├── {tid1}.json     ← version 1
+    ├── {tid2}.json     ← version 2
+    └── {tid3}.json     ← version 3 (latest)
+```
+
+## Record Format
+
+core (single record, rkey: self):
+```json
+{
+  "uri": "at://{did}/ai.syui.gpt.core/self",
+  "value": {
+    "$type": "ai.syui.gpt.core",
+    "did": "did:plc:xxx",
+    "handle": "ai.syui.ai",
+    "content": {
+      "$type": "ai.syui.gpt.core#markdown",
+      "text": "personality and instructions"
+    },
+    "createdAt": "2025-01-01T00:00:00Z"
+  }
+}
+```
+
+memory (multiple records, rkey: tid):
+```json
+{
+  "uri": "at://{did}/ai.syui.gpt.memory/{tid}",
+  "value": {
+    "$type": "ai.syui.gpt.memory",
+    "did": "did:plc:xxx",
+    "content": {
+      "$type": "ai.syui.gpt.memory#markdown",
+      "text": "# Memory\n\n## ..."
+    },
+    "version": 5,
+    "createdAt": "2026-03-01T12:00:00Z"
+  }
+}
 ```
 
 ## Architecture
@@ -35,8 +75,8 @@ compress note: AI decides what to keep/discard. Tool just writes.
 ```
 src/
 ├── mcp/server.rs   ← JSON-RPC over stdio
-├── core/reader.rs  ← read core.md, memory.md
+├── core/reader.rs  ← read core.json, memory/*.json
-├── core/writer.rs  ← write memory.md
+├── core/writer.rs  ← write memory/{tid}.json
 └── main.rs         ← CLI + MCP server
 ```
 
@@ -46,20 +86,20 @@ When compress is called, AI should:
 - Keep facts and decisions
 - Discard procedures and processes
 - Resolve contradictions (keep newer)
-- Don't duplicate core.md content
+- Don't duplicate core.json content
 
 ## Usage
 
 ```bash
-aigpt serve          # start MCP server
+aigpt server             # start MCP server
-aigpt read-core      # CLI: read core.md
+aigpt read-core          # CLI: read core.json
-aigpt read-memory    # CLI: read memory.md
+aigpt read-memory        # CLI: read latest memory
-aigpt save-memory "content"  # CLI: write memory.md
+aigpt save-memory "..."  # CLI: create new memory record
 ```
 
 ## Tech
 
-- Rust, MCP (JSON-RPC over stdio), file I/O only
+- Rust, MCP (JSON-RPC over stdio), atproto record format, file I/O only
 
 ## History
 

src/core/config.rs

@@ -0,0 +1,117 @@
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use std::fs;
+use std::path::PathBuf;
+
+use chrono::Utc;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Config {
+    pub path: Option<String>,
+    pub did: Option<String>,
+    pub handle: Option<String>,
+}
+
+pub fn config_file() -> PathBuf {
+    dirs::config_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("ai.syui.gpt")
+        .join("config.json")
+}
+
+pub fn load() -> Config {
+    let path = config_file();
+    match fs::read_to_string(&path) {
+        Ok(content) => serde_json::from_str(&content).unwrap_or(defaults()),
+        Err(_) => defaults(),
+    }
+}
+
+fn defaults() -> Config {
+    Config {
+        path: None,
+        did: None,
+        handle: None,
+    }
+}
+
+pub fn init() {
+    let cfg_path = config_file();
+    if !cfg_path.exists() {
+        if let Some(parent) = cfg_path.parent() {
+            let _ = fs::create_dir_all(parent);
+        }
+        let default_cfg = json!({
+            "path": null,
+            "did": null,
+            "handle": null
+        });
+        let _ = fs::write(&cfg_path, serde_json::to_string_pretty(&default_cfg).unwrap());
+    }
+
+    let cfg = load();
+    let core_path = record_path(&cfg, "ai.syui.gpt.core", "self");
+    if !core_path.exists() {
+        if let Some(parent) = core_path.parent() {
+            let _ = fs::create_dir_all(parent);
+        }
+        let did = cfg.did.clone().unwrap_or_else(|| "self".to_string());
+        let handle = cfg.handle.clone().unwrap_or_else(|| "self".to_string());
+        let now = Utc::now().format("%Y-%m-%dT%H:%M:%SZ").to_string();
+        let core_record = json!({
+            "uri": format!("at://{}/ai.syui.gpt.core/self", did),
+            "value": {
+                "$type": "ai.syui.gpt.core",
+                "did": did,
+                "handle": handle,
+                "content": {
+                    "$type": "ai.syui.gpt.core#markdown",
+                    "text": ""
+                },
+                "createdAt": now
+            }
+        });
+        let _ = fs::write(&core_path, serde_json::to_string_pretty(&core_record).unwrap());
+    }
+
+    let memory_dir = collection_dir(&cfg, "ai.syui.gpt.memory");
+    let _ = fs::create_dir_all(&memory_dir);
+}
+
+pub fn base_dir(cfg: &Config) -> PathBuf {
+    match &cfg.path {
+        Some(p) => {
+            if p.starts_with("~/") {
+                dirs::home_dir()
+                    .unwrap_or_else(|| PathBuf::from("."))
+                    .join(&p[2..])
+            } else {
+                PathBuf::from(p)
+            }
+        }
+        None => dirs::config_dir()
+            .unwrap_or_else(|| PathBuf::from("."))
+            .join("ai.syui.gpt"),
+    }
+}
+
+pub fn identity(cfg: &Config) -> String {
+    if cfg!(windows) {
+        cfg.handle.clone().unwrap_or_else(|| "self".to_string())
+    } else {
+        cfg.did.clone().unwrap_or_else(|| "self".to_string())
+    }
+}
+
+/// $cfg/{did|handle}/{collection}/{rkey}.json
+pub fn record_path(cfg: &Config, collection: &str, rkey: &str) -> PathBuf {
+    base_dir(cfg)
+        .join(identity(cfg))
+        .join(collection)
+        .join(format!("{}.json", rkey))
+}
+
+/// $cfg/{did|handle}/{collection}/
+pub fn collection_dir(cfg: &Config, collection: &str) -> PathBuf {
+    base_dir(cfg).join(identity(cfg)).join(collection)
+}

src/core/mod.rs

@@ -1,2 +1,3 @@
+pub mod config;
 pub mod reader;
 pub mod writer;

src/core/reader.rs

@@ -1,24 +1,37 @@
 use anyhow::{Context, Result};
+use serde_json::Value;
 use std::fs;
-use std::path::PathBuf;
 
-fn config_dir() -> PathBuf {
+use crate::core::config;
-    dirs::config_dir()
+
-        .unwrap_or_else(|| PathBuf::from("."))
+pub fn read_core() -> Result<Value> {
-        .join("ai.syui.gpt")
+    let cfg = config::load();
+    let path = config::record_path(&cfg, "ai.syui.gpt.core", "self");
+    let content = fs::read_to_string(&path)
+        .with_context(|| format!("Failed to read {}", path.display()))?;
+    let record: Value = serde_json::from_str(&content)
+        .with_context(|| format!("Failed to parse {}", path.display()))?;
+    Ok(record)
 }
 
-pub fn read_core() -> Result<String> {
+pub fn read_memory() -> Result<Option<Value>> {
-    let path = config_dir().join("core.md");
+    let cfg = config::load();
-    fs::read_to_string(&path)
+    let dir = config::collection_dir(&cfg, "ai.syui.gpt.memory");
-        .with_context(|| format!("Failed to read {}", path.display()))
+    if !dir.exists() {
-}
+        return Ok(None);
-
-pub fn read_memory() -> Result<String> {
-    let path = config_dir().join("memory.md");
-    match fs::read_to_string(&path) {
-        Ok(content) => Ok(content),
-        Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(String::new()),
-        Err(e) => Err(e).with_context(|| format!("Failed to read {}", path.display())),
     }
+    let mut files: Vec<_> = fs::read_dir(&dir)?
+        .filter_map(|e| e.ok())
+        .filter(|e| e.path().extension().is_some_and(|ext| ext == "json"))
+        .collect();
+    if files.is_empty() {
+        return Ok(None);
+    }
+    files.sort_by_key(|e| e.file_name());
+    let latest = files.last().unwrap().path();
+    let content = fs::read_to_string(&latest)
+        .with_context(|| format!("Failed to read {}", latest.display()))?;
+    let record: Value = serde_json::from_str(&content)
+        .with_context(|| format!("Failed to parse {}", latest.display()))?;
+    Ok(Some(record))
 }

src/core/writer.rs

@@ -1,18 +1,59 @@
 use anyhow::{Context, Result};
+use chrono::Utc;
+use serde_json::json;
 use std::fs;
-use std::path::PathBuf;
+use std::time::{SystemTime, UNIX_EPOCH};
 
-fn config_dir() -> PathBuf {
+use crate::core::{config, reader};
-    dirs::config_dir()
+
-        .unwrap_or_else(|| PathBuf::from("."))
+fn generate_tid() -> String {
-        .join("ai.syui.gpt")
+    const CHARSET: &[u8] = b"234567abcdefghijklmnopqrstuvwxyz";
+    let micros = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap()
+        .as_micros() as u64;
+    let mut tid = [0u8; 13];
+    let mut v = micros;
+    for i in (0..13).rev() {
+        tid[i] = CHARSET[(v & 0x1f) as usize];
+        v >>= 5;
+    }
+    String::from_utf8(tid.to_vec()).unwrap()
+}
+
+fn next_version() -> u64 {
+    match reader::read_memory() {
+        Ok(Some(record)) => record["value"]["version"].as_u64().unwrap_or(0) + 1,
+        _ => 1,
+    }
 }
 
 pub fn save_memory(content: &str) -> Result<()> {
-    let dir = config_dir();
+    let cfg = config::load();
+    let did = cfg.did.clone().unwrap_or_else(|| "self".to_string());
+    let tid = generate_tid();
+    let version = next_version();
+    let now = Utc::now().format("%Y-%m-%dT%H:%M:%SZ").to_string();
+
+    let record = json!({
+        "uri": format!("at://{}/ai.syui.gpt.memory/{}", did, tid),
+        "value": {
+            "$type": "ai.syui.gpt.memory",
+            "did": did,
+            "content": {
+                "$type": "ai.syui.gpt.memory#markdown",
+                "text": content
+            },
+            "version": version,
+            "createdAt": now
+        }
+    });
+
+    let dir = config::collection_dir(&cfg, "ai.syui.gpt.memory");
     fs::create_dir_all(&dir)
         .with_context(|| format!("Failed to create {}", dir.display()))?;
-    let path = dir.join("memory.md");
+    let path = dir.join(format!("{}.json", tid));
-    fs::write(&path, content)
+    let json_str = serde_json::to_string_pretty(&record)?;
+    fs::write(&path, json_str)
         .with_context(|| format!("Failed to write {}", path.display()))
 }

src/main.rs

@@ -1,16 +1,16 @@
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 
-use aigpt::core::{reader, writer};
+use aigpt::core::{config, reader, writer};
 use aigpt::mcp::MCPServer;
 
 #[derive(Parser)]
 #[command(name = "aigpt")]
-#[command(about = "AI memory MCP server - read/write core.md and memory.md")]
+#[command(about = "AI memory MCP server")]
 #[command(version)]
 struct Cli {
     #[command(subcommand)]
-    command: Commands,
+    command: Option<Commands>,
 }
 
 #[derive(Subcommand)]
@@ -18,13 +18,13 @@ enum Commands {
     /// Start MCP server (JSON-RPC over stdio)
     Server,
 
-    /// Read core.md
+    /// Read core.json
     ReadCore,
 
-    /// Read memory.md
+    /// Read latest memory record
     ReadMemory,
 
-    /// Save content to memory.md
+    /// Create new memory record
     SaveMemory {
         /// Content to write
         content: String,
@@ -32,29 +32,70 @@ enum Commands {
 }
 
 fn main() -> Result<()> {
+    config::init();
     let cli = Cli::parse();
 
     match cli.command {
-        Commands::Server => {
+        None => {
+            print_status();
+        }
+
+        Some(Commands::Server) => {
             let server = MCPServer::new();
             server.run()?;
         }
 
-        Commands::ReadCore => {
+        Some(Commands::ReadCore) => {
-            let content = reader::read_core()?;
+            let record = reader::read_core()?;
-            print!("{}", content);
+            println!("{}", serde_json::to_string_pretty(&record)?);
         }
 
-        Commands::ReadMemory => {
+        Some(Commands::ReadMemory) => {
-            let content = reader::read_memory()?;
+            match reader::read_memory()? {
-            print!("{}", content);
+                Some(record) => println!("{}", serde_json::to_string_pretty(&record)?),
+                None => println!("No memory records found"),
+            }
         }
 
-        Commands::SaveMemory { content } => {
+        Some(Commands::SaveMemory { content }) => {
             writer::save_memory(&content)?;
-            println!("Saved to memory.md");
+            println!("Saved.");
         }
     }
 
     Ok(())
 }
+
+fn print_status() {
+    let cfg = config::load();
+    let did = cfg.did.clone().unwrap_or_else(|| "self".to_string());
+    let handle = cfg.handle.clone().unwrap_or_else(|| "self".to_string());
+    let base = config::base_dir(&cfg);
+    let id = config::identity(&cfg);
+
+    let memory_dir = config::collection_dir(&cfg, "ai.syui.gpt.memory");
+    let memory_count = std::fs::read_dir(&memory_dir)
+        .map(|entries| {
+            entries
+                .filter_map(|e| e.ok())
+                .filter(|e| e.path().extension().is_some_and(|ext| ext == "json"))
+                .count()
+        })
+        .unwrap_or(0);
+
+    let latest_version = match reader::read_memory() {
+        Ok(Some(record)) => record["value"]["version"].as_u64().unwrap_or(0),
+        _ => 0,
+    };
+
+    println!("aigpt - AI memory MCP server\n");
+    println!("config: {}", config::config_file().display());
+    println!("did:    {}", did);
+    println!("handle: {}", handle);
+    println!();
+    println!("path: {}/", base.display());
+    println!("  {}/{}", id, "ai.syui.gpt.core/self.json");
+    println!("  {}/{}", id, "ai.syui.gpt.memory/*.json");
+    println!();
+    println!("memory: {} records (version: {})", memory_count, latest_version);
+}

src/mcp/server.rs

@@ -162,14 +162,15 @@ impl MCPServer {
 
     fn tool_read_core(&self) -> Value {
         match reader::read_core() {
-            Ok(content) => json!({ "content": content }),
+            Ok(record) => record,
             Err(e) => json!({ "error": e.to_string() }),
         }
     }
 
     fn tool_read_memory(&self) -> Value {
         match reader::read_memory() {
-            Ok(content) => json!({ "content": content }),
+            Ok(Some(record)) => record,
+            Ok(None) => json!({ "content": "" }),
             Err(e) => json!({ "error": e.to_string() }),
         }
     }