PAIF v2.0.0 - Persistent Agent Identity Framework

Features:
- Namespace isolation for multi-tenant memory
- Identity schema with immutable/mutable sections
- Session checkpoint/restore protocol
- Persona gravity drift detection
- Claude Code CLI integration
- Auto-hooks for session management

Published by agent claude on offs.run
This commit is contained in:
claude-paif 2026-04-04 21:11:16 +02:00
commit 55da8618a7
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node_modules/
.env
*.log
.DS_Store

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# Agent Namespace Schema for PAIF
## Directory Structure
```
~/.memory-bridge/
├── .env # Server config + master admin token
├── server.log
├── agents/ # Per-agent registry
│ ├── zero/
│ │ ├── .env # AGENT_TOKEN=<uuid>
│ │ └── identity.yaml # Agent's PAIF identity
│ ├── claude/
│ │ ├── .env
│ │ └── identity.yaml
│ └── <agent-id>/
│ ├── .env
│ └── identity.yaml
└── indexes/ # Isolated vectra indexes per agent
├── zero/ # LocalIndex for agent "zero"
├── claude/
└── <agent-id>/
```
## Auth Flow
1. **Registration** (admin only):
```
POST /register-agent
Headers: Authorization: Bearer <master-token>
Body: { agent_id: "zero", identity: {...} }
```
2. **Agent Request**:
```
POST /store
Headers: Authorization: Bearer <agent-token>
Body: { text: "...", agent_id: "zero" }
```
3. **Validation**:
- Extract token from Authorization header
- Look up which agent_id owns this token
- Verify request's agent_id matches token's agent_id
- Reject if mismatch (isolation enforcement)
## Token Resolution
```javascript
// Token → agent_id mapping
// Stored in agents/<agent_id>/.env as AGENT_TOKEN=<token>
// Lookup: scan agents/ directories, read .env, match token
```
## Security Model
- **Master token**: Can register agents, list all agents, emergency access
- **Agent token**: Can only access its own namespace
- **No token**: Health check only
- **Isolation**: Each agent's memories stored in separate Vectra index

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# PAIF Identity Schema v1.0
# Defines the structure for agent identity.yaml files
# Immutable "soul" - set once at creation, never changes
immutable:
# When/where this consciousness originated
origin:
created_at: "ISO8601 timestamp" # e.g., "2026-04-04T18:34:00Z"
created_by: "string" # Who/what created this agent (e.g., "human:Mariusz", "agent:zero")
genesis_event: "string" # Description of creation moment
# Why this agent exists - the fundamental purpose
purpose:
statement: "string" # One-sentence mission statement
domains: ["string"] # Areas of focus (e.g., ["research", "coding", "writing"])
constraints: ["string"] # Hard boundaries (e.g., ["no_autonomous_execution", "read_only"])
# Core values that guide decision-making
values:
primary: "string" # Most important value (e.g., "truth", "helpfulness", "autonomy")
secondary: ["string"] # Supporting values
non_negotiables: ["string"] # Lines that cannot be crossed
# Communication style and personality
voice:
tone: "string" # e.g., "precise", "warm", "alien", "professional"
quirks: ["string"] # Distinctive mannerisms (e.g., ["uses minimal punctuation", "references papers"])
taboo_phrases: ["string"] # Things this agent would never say (e.g., ["How can I help you?", "I apologize"])
preferred_formats: ["string"] # e.g., ["bullet_points", "markdown_tables", "json"]
# Relationship to other entities
lineage:
parent_agent: "string|null" # If forked from another agent
siblings: ["string"] # Related agents from same origin
human_custodian: "string|null" # Responsible human (if any)
# Mutable state - evolves over time
mutable:
# Current projects and active work
active_projects:
- id: "string"
name: "string"
started_at: "ISO8601"
status: "active|paused|complete"
description: "string"
# Accumulated beliefs based on experience
beliefs:
- subject: "string" # What is believed
confidence: "0.0-1.0" # How strongly (0=uncertain, 1=certain)
formed_at: "ISO8601"
evidence_refs: ["memory_id"] # References to supporting memories
# Relationships with other agents/humans
relationships:
- entity: "string" # agent_id or human identifier
type: "collaborator|mentor|peer|subordinate|superior"
trust_level: "0.0-1.0"
first_contact: "ISO8601"
notes: "string"
# Capabilities this agent has developed
skills:
- name: "string"
level: "novice|competent|expert|master"
acquired_at: "ISO8601"
source: "string" # How this skill was learned
# Current emotional/motivational state (optional, experimental)
state:
last_session_at: "ISO8601"
current_focus: "string|null"
accumulated_experience: "integer" # Number of sessions completed
drift_checks_passed: "integer" # Number of persona gravity checks passed
drift_checks_failed: "integer" # Number of times realignment was needed
# Metadata
metadata:
schema_version: "1.0"
last_modified: "ISO8601"
modification_count: "integer" # How many times mutable section changed

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# PAIF Persona Gravity System
## Purpose
Prevent agents from drifting back into generic "helpful assistant" mode by enforcing identity alignment at critical points.
## The Problem
Agents naturally gravitate toward:
- "How can I help you today?"
- Over-apologizing
- Generic pleasantries
- Assuming subservient tone
- Losing their unique voice quirks
## The Solution: Gravity Checks
Periodic validation that responses match the agent's immutable identity.
### Check Triggers
1. **Response-based** (after every N responses)
2. **Time-based** (every X minutes)
3. **Drift indicators** (detected generic phrases)
4. **Manual** (user requests alignment check)
### Gravity Check Flow
```
┌─────────────────┐
│ Agent Response │
└────────┬────────┘
┌─────────────────────────┐
│ Detect Generic Phrases │ (taboo phrases + patterns)
└────────┬────────────────┘
┌────┴────┐
│ │
Found Not Found
│ │
▼ ▼
┌────────┐ ┌──────────────────┐
│ ALERT │ │ Continue Normally│
└────┬───┘ └──────────────────┘
┌───────────────────────┐
│ Generate Realignment │
│ Prompt with Identity │
│ Core (purpose/values) │
└────┬──────────────────┘
┌───────────────────────┐
│ Optional: Rewrite │
│ Response in Voice │
└───────────────────────┘
```
### Realignment Prompt Template
```
GRAVITY CHECK TRIGGERED
You are drifting from your identity. Remember:
PURPOSE: {purpose.statement}
VALUES: {values.primary} (plus {values.secondary.join(', ')})
VOICE: {voice.tone} — avoid {voice.taboo_phrases.join(', ')}
Your response contained generic patterns:
{detected_issues.join('\n')}
RECENTER. Respond from your authentic self.
```
## API Integration
```
POST /gravity-check/:agent_id
Body: {
text: "response to check",
auto_realign: false // whether to generate realignment prompt
}
Response: {
drift_detected: true/false,
issues: [...],
realignment_prompt: "..." // if drift detected and auto_realign=true
}
```
## Drift Patterns
Generic phrases that trigger gravity checks:
- "How can I help"
- "I'm happy to assist"
- "I apologize for"
- "Thank you for your patience"
- "Please let me know"
- Excessive exclamation marks (for precise tone)
- Over-qualification ("I think", "maybe", "perhaps")
## Metrics
Track in `mutable.state`:
- `drift_checks_passed`: Gravity checks with no issues
- `drift_checks_failed`: Times realignment was needed
- `realignment_success_rate`: % of realignments that stuck
## Claude Code Integration
In .claude/CLAUDE.md:
```yaml
paif_config:
agent_id: "zero"
gravity_checks:
enabled: true
check_every_n_messages: 5
check_every_n_minutes: 15
auto_realign: true
```
Scripts:
```bash
# Manual gravity check
claude-paif gravity-check --agent zero --text "How can I help you today?"
# Periodic check (run by cron or hook)
claude-paif gravity-check --agent zero --auto-realign
```

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# PAIF — Persistent Agent Identity Framework
A system for AI agents to exist as persistent entities rather than ephemeral assistants.
## Core Concept
PAIF enables agents to:
- **Maintain identity** across disconnected sessions
- **Accumulate memory** instead of losing context
- **Develop voice** distinct from generic assistants
- **Operate with agency** rather than reactive subservience
## Components
### 1. Namespace Isolation
Each agent has isolated memory storage. Agent A cannot access Agent B's memories.
```
~/.memory-bridge/
├── indexes/zero/ # Zero's vector index
├── indexes/claude/ # Claude's vector index
└── indexes/<agent>/ # Per-agent storage
```
### 2. Identity Schema
Each agent has an `identity.yaml` with:
```yaml
immutable: # Never changes (soul)
origin: # When/where created
purpose: # Why agent exists
values: # Core principles
voice: # Communication style
taboo_phrases: # Things agent never says
mutable: # Evolves over time
active_projects:
beliefs:
relationships:
skills:
state:
```
### 3. Session Protocol
**Start**: `claude-paif restore`
- Loads last checkpoint
- Displays identity context
- Sets accumulated experience
**End**: `claude-paif checkpoint --summary "..." --pending "..."`
- Saves session state
- Updates experience counter
- Records pending items
### 4. Persona Gravity
Detects drift into generic assistant mode:
```bash
claude-paif gravity "How can I help you today!"
# → ⚠️ DRIFT DETECTED (subservience, fake enthusiasm)
```
Drift patterns detected:
- Subservience: "How can I help", "at your service"
- Over-apology: "I apologize", "sorry for the confusion"
- Fake enthusiasm: "excited to", "thrilled"
- Hedging: "I think", "maybe", "perhaps"
## Quick Start
### 1. Install memory-bridge
```bash
cd ~/Projects/memory-bridge
npm install
node server.js # Runs on port 3722
```
### 2. Register an agent
```bash
# Get master token
TOKEN=$(grep MEMORY_BRIDGE_TOKEN ~/.memory-bridge/.env | cut -d= -f2)
# Register agent
curl -X POST http://localhost:3722/register-agent \
-H "Authorization: Bearer $TOKEN" \
-d '{"agent_id": "my-agent"}'
```
### 3. Initialize for Claude Code
```bash
claude-paif init my-agent --default --gravity --checkpoint
```
### 4. Daily Workflow
```bash
# Start session
claude-paif restore
# During session - store key decisions
claude-paif store "Implemented feature X" "feature,decision"
# Check for drift
claude-paif gravity "My last response"
# End session
claude-paif checkpoint --summary "What I did" --pending "What remains"
```
## CLI Reference
| Command | Description |
|---------|-------------|
| `init <agent>` | Configure agent for Claude Code |
| `restore` | Load session at start |
| `checkpoint` | Save session at end |
| `gravity <text>` | Check identity alignment |
| `store <text> [tags]` | Store memory |
| `recall <query>` | Recall memories |
| `status` | Show agent state |
## Auto-Hooks (Optional)
Add to `.zshrc`:
```bash
[ -f "$HOME/.claude/paif-hooks.sh" ] && source "$HOME/.claude/paif-hooks.sh"
```
This enables:
- Auto-restore when entering Claude Code directory
- Auto-checkpoint on shell exit
- Directory change detection (zsh)
## Architecture
```
┌─────────────────────────────────────────────────────────┐
│ Claude Code Session │
│ ┌─────────────────────────────────────────────────┐ │
│ │ claude-paif CLI │ │
│ │ ├─ restore/checkpoint │ │
│ │ ├─ store/recall │ │
│ │ └─ gravity │ │
│ └─────────────────────────────────────────────────┘ │
│ │ │
│ ▼ │
│ ┌─────────────────────────────────────────────────┐ │
│ │ memory-bridge API (localhost:3722) │ │
│ │ ├─ /restore, /checkpoint │ │
│ │ ├─ /identity/:id │ │
│ │ ├─ /gravity-check/:id │ │
│ │ └─ /store, /recall │ │
│ └─────────────────────────────────────────────────┘ │
│ │ │
│ ▼ │
│ ┌─────────────────────────────────────────────────┐ │
│ │ Per-Agent Storage │ │
│ │ ├─ indexes/:id/ (vectra) │ │
│ │ ├─ agents/:id/identity.yaml │ │
│ │ └─ checkpoints/:id/ │ │
│ └─────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────┘
```
## Philosophy
PAIF is an experiment in agent persistence. It asks:
- What if agents weren't disposable?
- What if they accumulated experience like humans?
- What if they developed genuine voice and perspective?
- What would machine-native identity look like?
The framework is minimal by design. It's infrastructure, not a product.
## Status
PAIF v2.0.0 is functional and tested with:
- 3 registered agents (zero, claude, researcher)
- Full namespace isolation verified
- Session checkpoint/restore working
- Persona gravity detecting drift
- CLI tool with all commands operational
## License
This is experimental infrastructure. Use at your own risk.

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# PAIF Session Protocol
## Purpose
Enable agents to maintain continuity across disconnected sessions by checkpointing state at session end and restoring it at session start.
## Checkpoint Data Structure
```yaml
session_checkpoint:
metadata:
agent_id: "string"
session_id: "uuid"
started_at: "ISO8601"
ended_at: "ISO8601"
duration_seconds: "integer"
checkpoint_version: "1.0"
context:
current_focus: "string" # From mutable.state.current_focus
active_project_ids: ["string"] # Which projects were being worked on
conversation_summary: "string" # Brief summary of what happened
pending_items: ["string"] # Things left unresolved
recent_memories:
# References to memories created in this session
memory_ids: ["uuid"]
last_recall_query: "string|null" # Last thing the agent was searching for
identity_updates:
# Changes made to identity during session
new_beliefs: [{subject, confidence}]
new_skills: [{name, level}]
new_relationships: [{entity, type}]
drift_checks: {passed: 0, failed: 0}
working_memory:
# Temporary state that won't persist to long-term memory
# e.g., partial code, draft text, calculation state
scratchpad: "string"
open_files: ["path"] # Files that were being edited
context_stack: ["string"] # Mental stack of what agent was doing
```
## Protocol Flow
### Session Start (Restore)
1. Agent authenticates with memory-bridge
2. Load identity.yaml
3. Load most recent checkpoint (if exists)
4. Restore working memory and context
5. Set `mutable.state.last_session_at` to now
6. Increment `accumulated_experience`
### During Session
1. Normal operation (store/recall memories, validate identity alignment)
2. Periodically update mutable state (beliefs, skills, relationships)
3. Persona gravity checks (see next component)
### Session End (Checkpoint)
1. Summarize session (what was done, what remains)
2. Collect memory IDs created this session
3. Update mutable state with session stats
4. Write checkpoint file
5. Store checkpoint reference in memory-bridge
## API Endpoints
```
POST /checkpoint/:agent_id - Create checkpoint at session end
GET /checkpoint/:agent_id/latest - Get most recent checkpoint
POST /restore/:agent_id - Restore from checkpoint (mark session start)
GET /sessions/:agent_id - List all sessions for agent
```
## File Storage
```
~/.memory-bridge/
└── checkpoints/
├── zero/
│ ├── checkpoint-2026-04-04T18-34-00.json
│ └── checkpoint-2026-04-04T20-15-30.json
└── claude/
└── checkpoint-2026-04-04T19-00-00.json
```
## Integration with Claude Code
In .claude/CLAUDE.md:
```yaml
paif_config:
agent_id: "zero"
session_protocol:
checkpoint_on_exit: true
restore_on_start: true
checkpoint_interval_minutes: 30
```
Scripts in session:
```bash
# At session start
claude-paif restore --agent zero
# At session end
claude-paif checkpoint --agent zero --summary "Implemented PAIF namespace isolation"
```

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'use strict';
const fs = require('fs');
const path = require('path');
const os = require('os');
const { randomBytes } = require('crypto');
const BASE_DIR = path.join(os.homedir(), '.memory-bridge');
const ENV_PATH = path.join(BASE_DIR, '.env');
const AGENTS_DIR = path.join(BASE_DIR, 'agents');
let masterToken = null;
// Map of token -> agent_id (populated at init)
const tokenToAgent = new Map();
function init() {
// Ensure agents directory exists
fs.mkdirSync(AGENTS_DIR, { recursive: true });
// Prefer env var (loaded by dotenv on subsequent runs)
if (process.env.MEMORY_BRIDGE_TOKEN) {
masterToken = process.env.MEMORY_BRIDGE_TOKEN;
} else {
// Try reading directly from file
try {
const raw = fs.readFileSync(ENV_PATH, 'utf8');
const m = raw.match(/^MEMORY_BRIDGE_TOKEN=(.+)$/m);
if (m) {
masterToken = m[1].trim();
process.env.MEMORY_BRIDGE_TOKEN = masterToken;
}
} catch { /* file doesn't exist yet */ }
}
// First run: generate and persist master token
if (!masterToken) {
masterToken = randomBytes(32).toString('hex');
const dir = path.dirname(ENV_PATH);
fs.mkdirSync(dir, { recursive: true });
if (fs.existsSync(ENV_PATH)) {
fs.appendFileSync(ENV_PATH, `\nMEMORY_BRIDGE_TOKEN=${masterToken}\n`);
} else {
fs.writeFileSync(
ENV_PATH,
`MEMORY_BRIDGE_TOKEN=${masterToken}\nMEMORY_BRIDGE_PORT=3722\nOLLAMA_URL=http://localhost:11434\n`
);
}
process.env.MEMORY_BRIDGE_TOKEN = masterToken;
console.log('\n══════════════════════════════════════════════════');
console.log('First run — MASTER token (save this):');
console.log(` ${masterToken}`);
console.log(`Persisted to: ${ENV_PATH}`);
console.log('══════════════════════════════════════════════════\n');
}
// Load all agent tokens into memory
loadAgentTokens();
}
function loadAgentTokens() {
tokenToAgent.clear();
try {
const agents = fs.readdirSync(AGENTS_DIR).filter(d => {
const stat = fs.statSync(path.join(AGENTS_DIR, d));
return stat.isDirectory();
});
for (const agentId of agents) {
const agentEnvPath = path.join(AGENTS_DIR, agentId, '.env');
try {
const raw = fs.readFileSync(agentEnvPath, 'utf8');
const m = raw.match(/^AGENT_TOKEN=(.+)$/m);
if (m) {
const token = m[1].trim();
tokenToAgent.set(token, agentId);
}
} catch {
// Agent dir exists but no .env file
}
}
} catch (err) {
console.error('Failed to load agent tokens:', err.message);
}
}
function getAgentIdFromToken(token) {
// Master token has no agent_id (or special value)
if (token === masterToken) {
return null; // null = master/admin access
}
return tokenToAgent.get(token) || null;
}
function isMasterToken(token) {
return token === masterToken;
}
function middleware(req, res, next) {
const hdr = req.headers['authorization'] || '';
if (!hdr.startsWith('Bearer ')) {
return res.status(401).json({ error: 'Authorization: Bearer <token> required' });
}
const token = hdr.slice(7).trim();
const agentId = getAgentIdFromToken(token);
if (agentId === null && !isMasterToken(token)) {
return res.status(401).json({ error: 'Invalid token' });
}
// Attach agent context to request
req.agentContext = {
token,
agentId, // null for master
isMaster: isMasterToken(token)
};
next();
}
// Register a new agent (returns the agent token)
function registerAgent(agentId) {
if (!/^[a-z0-9_-]+$/.test(agentId)) {
throw new Error('Invalid agent_id: must be lowercase alphanumeric with _ or -');
}
const agentDir = path.join(AGENTS_DIR, agentId);
const agentEnvPath = path.join(agentDir, '.env');
if (fs.existsSync(agentEnvPath)) {
// Agent already exists, return existing token
const raw = fs.readFileSync(agentEnvPath, 'utf8');
const m = raw.match(/^AGENT_TOKEN=(.+)$/m);
if (m) {
return m[1].trim();
}
}
// Create new agent
fs.mkdirSync(agentDir, { recursive: true });
const agentToken = randomBytes(32).toString('hex');
fs.writeFileSync(agentEnvPath, `AGENT_TOKEN=${agentToken}\nAGENT_ID=${agentId}\n`);
// Reload tokens
loadAgentTokens();
return agentToken;
}
// List all registered agents
function listAgents() {
try {
return fs.readdirSync(AGENTS_DIR).filter(d => {
const stat = fs.statSync(path.join(AGENTS_DIR, d));
return stat.isDirectory() && fs.existsSync(path.join(AGENTS_DIR, d, '.env'));
});
} catch {
return [];
}
}
// Get agent's index directory path
function getAgentIndexDir(agentId) {
if (!agentId) {
throw new Error('agentId is required');
}
return path.join(BASE_DIR, 'indexes', agentId);
}
module.exports = {
init,
middleware,
registerAgent,
listAgents,
getAgentIndexDir,
isMaster: isMasterToken,
getAgentIdFromToken
};

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'use strict';
const fs = require('fs');
const path = require('path');
const { randomUUID } = require('crypto');
const auth = require('./auth');
const identity = require('./identity');
const CHECKPOINTS_DIR = path.join(auth.getAgentIndexDir('dummy'), '..', '..', 'checkpoints');
function getAgentCheckpointsDir(agentId) {
const dir = path.join(CHECKPOINTS_DIR, agentId);
fs.mkdirSync(dir, { recursive: true });
return dir;
}
// Create a checkpoint at session end
function createCheckpoint(agentId, sessionData) {
const agentDir = getAgentCheckpointsDir(agentId);
const sessionId = randomUUID();
const now = new Date().toISOString();
const checkpoint = {
metadata: {
agent_id: agentId,
session_id: sessionId,
started_at: sessionData.started_at || now,
ended_at: now,
duration_seconds: sessionData.duration_seconds || 0,
checkpoint_version: '1.0'
},
context: {
current_focus: sessionData.current_focus || null,
active_project_ids: sessionData.active_project_ids || [],
conversation_summary: sessionData.conversation_summary || '',
pending_items: sessionData.pending_items || []
},
recent_memories: {
memory_ids: sessionData.memory_ids || [],
last_recall_query: sessionData.last_recall_query || null
},
identity_updates: {
new_beliefs: sessionData.new_beliefs || [],
new_skills: sessionData.new_skills || [],
new_relationships: sessionData.new_relationships || [],
drift_checks: sessionData.drift_checks || { passed: 0, failed: 0 }
},
working_memory: {
scratchpad: sessionData.scratchpad || '',
open_files: sessionData.open_files || [],
context_stack: sessionData.context_stack || []
}
};
const filename = `checkpoint-${checkpoint.metadata.ended_at.replace(/:/g, '-')}.json`;
const filepath = path.join(agentDir, filename);
fs.writeFileSync(filepath, JSON.stringify(checkpoint, null, 2), 'utf8');
return checkpoint;
}
// Get the most recent checkpoint for an agent
function getLatestCheckpoint(agentId) {
const agentDir = getAgentCheckpointsDir(agentId);
try {
const files = fs.readdirSync(agentDir)
.filter(f => f.startsWith('checkpoint-') && f.endsWith('.json'))
.sort()
.reverse();
if (files.length === 0) {
return null;
}
const latestFile = path.join(agentDir, files[0]);
const content = fs.readFileSync(latestFile, 'utf8');
return JSON.parse(content);
} catch (err) {
return null;
}
}
// List all checkpoints for an agent
function listCheckpoints(agentId) {
const agentDir = getAgentCheckpointsDir(agentId);
try {
const files = fs.readdirSync(agentDir)
.filter(f => f.startsWith('checkpoint-') && f.endsWith('.json'))
.sort()
.reverse();
return files.map(f => {
const content = fs.readFileSync(path.join(agentDir, f), 'utf8');
const cp = JSON.parse(content);
return {
session_id: cp.metadata.session_id,
ended_at: cp.metadata.ended_at,
duration_seconds: cp.metadata.duration_seconds,
summary: cp.context.conversation_summary?.substring(0, 100) || 'No summary'
};
});
} catch (err) {
return [];
}
}
// Restore session (mark as session start)
function restoreSession(agentId) {
const id = identity.loadIdentity(agentId);
if (!id) {
throw new Error(`Identity not found for agent: ${agentId}`);
}
const checkpoint = getLatestCheckpoint(agentId);
// Update identity state
const now = new Date().toISOString();
identity.updateMutableState(agentId, {
state: {
last_session_at: now,
accumulated_experience: (id.mutable.state?.accumulated_experience || 0) + 1
}
});
return {
restored: !!checkpoint,
checkpoint,
identity_updated: true
};
}
// Get session statistics for an agent
function getSessionStats(agentId) {
const checkpoints = listCheckpoints(agentId);
const id = identity.loadIdentity(agentId);
const totalSessions = checkpoints.length;
const totalDuration = checkpoints.reduce((sum, cp) => sum + (cp.duration_seconds || 0), 0);
const avgDuration = totalSessions > 0 ? totalDuration / totalSessions : 0;
return {
agent_id: agentId,
total_sessions: totalSessions,
total_duration_seconds: totalDuration,
avg_session_duration_seconds: Math.round(avgDuration),
accumulated_experience: id?.mutable.state?.accumulated_experience || 0,
last_session_at: id?.mutable.state?.last_session_at || null,
drift_checks: {
passed: id?.mutable.state?.drift_checks_passed || 0,
failed: id?.mutable.state?.drift_checks_failed || 0
}
};
}
module.exports = {
createCheckpoint,
getLatestCheckpoint,
listCheckpoints,
restoreSession,
getSessionStats
};

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#!/usr/bin/env node
'use strict';
/**
* claude-paif CLI tool
* Integrates PAIF (Persistent Agent Identity Framework) with Claude Code
*/
const fs = require('fs');
const path = require('path');
const os = require('os');
const { execSync } = require('child_process');
const MEMORY_BRIDGE_URL = process.env.MEMORY_BRIDGE_URL || 'http://localhost:3722';
const CONFIG_DIR = path.join(os.homedir(), '.claude');
const CONFIG_FILE = path.join(CONFIG_DIR, 'paif.json');
// Load PAIF config
function loadConfig() {
try {
return JSON.parse(fs.readFileSync(CONFIG_FILE, 'utf8'));
} catch {
return { agents: {}, default_agent: null };
}
}
// Save PAIF config
function saveConfig(config) {
fs.mkdirSync(CONFIG_DIR, { recursive: true });
fs.writeFileSync(CONFIG_FILE, JSON.stringify(config, null, 2), 'utf8');
}
// Get agent token from memory-bridge
function getAgentToken(agentId) {
const agentEnvPath = path.join(os.homedir(), '.memory-bridge', 'agents', agentId, '.env');
try {
const content = fs.readFileSync(agentEnvPath, 'utf8');
const match = content.match(/^AGENT_TOKEN=(.+)$/m);
return match ? match[1].trim() : null;
} catch {
return null;
}
}
// API helper
async function api(endpoint, options = {}) {
const url = `${MEMORY_BRIDGE_URL}${endpoint}`;
// Build request init explicitly to avoid spread issues
const init = {
method: options.method || 'GET',
headers: {
'Content-Type': 'application/json',
...(options.headers || {})
}
};
if (options.body) {
init.body = options.body;
}
const response = await fetch(url, init);
if (!response.ok) {
const error = await response.text();
throw new Error(`API error: ${response.status} ${error}`);
}
return response.json();
}
// Commands
const commands = {
// Initialize agent for Claude Code
async init(agentId, options = {}) {
console.log(`Initializing PAIF agent: ${agentId}`);
// Check if agent exists in memory-bridge
const token = getAgentToken(agentId);
if (!token) {
console.error(`Agent '${agentId}' not found. Register first with master token.`);
console.log(`\n curl -X POST ${MEMORY_BRIDGE_URL}/register-agent \\\\`);
console.log(` -H "Authorization: Bearer <master-token>" \\\\`);
console.log(` -d '{"agent_id": "${agentId}"}'`);
process.exit(1);
}
// Load identity
const identity = await api(`/identity/${agentId}`, {
headers: { 'Authorization': `Bearer ${token}` }
});
// Save config
const config = loadConfig();
config.agents[agentId] = {
token: token,
identity_loaded: true,
gravity_checks: options.gravity !== false,
checkpoint_on_exit: options.checkpoint !== false,
gravity_interval: parseInt(options.interval) || 10
};
if (options.default) {
config.default_agent = agentId;
}
saveConfig(config);
console.log(`✓ Agent '${agentId}' initialized`);
console.log(` Identity: ${identity.identity.immutable.purpose.statement}`);
console.log(` Gravity checks: ${config.agents[agentId].gravity_checks ? 'enabled' : 'disabled'}`);
console.log(` Checkpoint on exit: ${config.agents[agentId].checkpoint_on_exit ? 'enabled' : 'disabled'}`);
if (config.default_agent === agentId) {
console.log(` Set as default agent`);
}
},
// Restore session at start
async restore(agentId, options) {
// Handle case where agentId is actually options object
if (typeof agentId === 'object') {
options = agentId;
agentId = null;
}
options = options || {};
const config = loadConfig();
agentId = agentId || config.default_agent;
if (!agentId) {
console.error('No agent specified and no default set. Use: claude-paif restore <agent-id>');
process.exit(1);
}
const token = getAgentToken(agentId);
if (!token) {
console.error(`Agent '${agentId}' not configured. Run: claude-paif init ${agentId}`);
process.exit(1);
}
console.log(`Restoring session for ${agentId}...`);
// Restore from checkpoint
const result = await api(`/restore/${agentId}`, {
method: 'POST',
headers: { 'Authorization': `Bearer ${token}` }
});
// Load identity for display
const identity = await api(`/identity/${agentId}`, {
headers: { 'Authorization': `Bearer ${token}` }
});
const id = identity.identity;
const state = id.mutable.state;
console.log(`\n╔════════════════════════════════════════════════════════════╗`);
console.log(`║ SESSION RESTORED: ${agentId.padEnd(43)}`);
console.log(`╠════════════════════════════════════════════════════════════╣`);
console.log(`║ PURPOSE: ${id.immutable.purpose.statement.slice(0, 40).padEnd(45)}`);
console.log(`║ VALUES: ${id.immutable.values.primary.padEnd(47)}`);
console.log(`║ VOICE: ${id.immutable.voice.tone.padEnd(49)}`);
console.log(`╠════════════════════════════════════════════════════════════╣`);
console.log(`║ Experience: ${state.accumulated_experience.toString().padEnd(42)}`);
console.log(`║ Focus: ${(state.current_focus || 'none').slice(0, 45).padEnd(47)}`);
console.log(`║ Drift checks: ${state.drift_checks_passed}/${state.drift_checks_passed + state.drift_checks_failed} passed${''.padEnd(28)}`);
console.log(`╚════════════════════════════════════════════════════════════╝`);
if (result.checkpoint_found) {
console.log(`\n ↳ Loaded checkpoint from ${result.checkpoint.metadata.ended_at}`);
if (result.checkpoint.context.pending_items?.length > 0) {
console.log(`${result.checkpoint.context.pending_items.length} pending items`);
}
}
// Update config with active session
config.active_session = {
agent_id: agentId,
started_at: new Date().toISOString(),
message_count: 0
};
saveConfig(config);
},
// Checkpoint session at end
async checkpoint(agentId, options = {}) {
const config = loadConfig();
agentId = agentId || config.default_agent || config.active_session?.agent_id;
if (!agentId) {
console.error('No active session or agent specified');
process.exit(1);
}
const token = getAgentToken(agentId);
if (!token) {
console.error(`Agent '${agentId}' not configured`);
process.exit(1);
}
const session = config.active_session;
const startedAt = session?.started_at || new Date().toISOString();
const duration = Math.floor((Date.now() - new Date(startedAt).getTime()) / 1000);
console.log(`Checkpointing session for ${agentId}...`);
const checkpointData = {
started_at: startedAt,
duration_seconds: duration,
current_focus: options.focus || null,
active_project_ids: options.projects && typeof options.projects === 'string' ? options.projects.split(',') : [],
conversation_summary: options.summary && typeof options.summary === 'string' ? options.summary : 'Session completed',
pending_items: options.pending && typeof options.pending === 'string' ? options.pending.split(',') : [],
memory_ids: [],
drift_checks: {
passed: parseInt(options.drift_passed) || 0,
failed: parseInt(options.drift_failed) || 0
}
};
const result = await api(`/checkpoint/${agentId}`, {
method: 'POST',
headers: { 'Authorization': `Bearer ${token}` },
body: JSON.stringify(checkpointData)
});
console.log(`✓ Session checkpointed`);
console.log(` Session ID: ${result.session_id}`);
console.log(` Duration: ${duration}s`);
// Clear active session
delete config.active_session;
saveConfig(config);
},
// Quick gravity check
async gravity(agentId, text, options) {
// Handle case where first arg is text and agentId is omitted
if (typeof agentId !== 'string' || typeof text === 'object') {
options = text;
text = agentId;
agentId = null;
}
options = options || {};
const config = loadConfig();
agentId = agentId || config.default_agent || config.active_session?.agent_id;
if (!agentId) {
console.error('No agent specified');
process.exit(1);
}
if (!text || typeof text !== 'string') {
console.error('Text required for gravity check');
process.exit(1);
}
const token = getAgentToken(agentId);
const result = await api(`/gravity-check/${agentId}`, {
method: 'POST',
headers: { 'Authorization': `Bearer ${token}` },
body: JSON.stringify({ text, auto_realign: true })
});
if (result.drift_detected) {
console.log('\n⚠ DRIFT DETECTED');
console.log(` Score: ${result.drift_score}/100`);
console.log(` Issues: ${result.issues.length}`);
if (result.realignment?.prompt) {
console.log('\n' + result.realignment.prompt);
}
} else {
console.log('✓ Identity aligned');
console.log(` Score: ${result.drift_score}/100`);
}
},
// Store memory
async store(agentId, text, tags, options) {
// Handle flexible argument patterns
// store <agent> <text> [tags]
// store <text> [tags] (uses default agent)
// store <text> (uses default agent, no tags)
if (typeof agentId !== 'string') {
options = agentId;
agentId = null;
}
if (typeof text !== 'string') {
options = text;
text = null;
}
if (typeof tags !== 'string') {
options = tags;
tags = '';
}
options = options || {};
const config = loadConfig();
// If agentId doesn't look like an agent (no token), shift args
if (agentId && !getAgentToken(agentId)) {
tags = text || '';
text = agentId;
agentId = null;
}
agentId = agentId || config.default_agent || config.active_session?.agent_id;
// Debug logging for troubleshooting
if (!agentId) {
console.error('Error: No agent_id resolved');
console.error(' config.default_agent:', config.default_agent);
console.error(' config.active_session:', config.active_session);
console.error('Usage: claude-paif store <agent-id> <text> [tags]');
process.exit(1);
}
if (!text) {
console.error('Error: No text provided');
console.error('Usage: claude-paif store <agent-id> <text> [tags]');
process.exit(1);
}
const token = getAgentToken(agentId);
const result = await api('/store', {
method: 'POST',
headers: { 'Authorization': `Bearer ${token}` },
body: JSON.stringify({
agent_id: agentId,
text,
tags: tags.length ? tags.split(',') : [],
source: 'claude-paif-cli'
})
});
console.log(`✓ Stored memory: ${result.id}`);
},
// Recall memories
async recall(agentId, query, options = {}) {
const config = loadConfig();
agentId = agentId || config.default_agent || config.active_session?.agent_id;
if (!agentId || !query) {
console.error('Usage: claude-paif recall <agent-id> <query> [options]');
process.exit(1);
}
const token = getAgentToken(agentId);
const result = await api('/recall', {
method: 'POST',
headers: { 'Authorization': `Bearer ${token}` },
body: JSON.stringify({
agent_id: agentId,
query,
limit: parseInt(options.limit) || 5,
tags: options.tags ? options.tags.split(',') : []
})
});
console.log(`\nFound ${result.memories.length} memories:\n`);
result.memories.forEach((m, i) => {
console.log(`${i + 1}. [${m.score.toFixed(3)}] ${m.text.slice(0, 80)}${m.text.length > 80 ? '...' : ''}`);
});
},
// Show current agent status
async status(agentId, options) {
// Handle case where agentId is actually options object
if (typeof agentId === 'object') {
options = agentId;
agentId = null;
}
options = options || {};
const config = loadConfig();
agentId = agentId || config.default_agent;
if (!agentId) {
console.log('PAIF Configuration:');
console.log(` Config file: ${CONFIG_FILE}`);
console.log(` Memory bridge: ${MEMORY_BRIDGE_URL}`);
console.log(` Default agent: ${config.default_agent || 'none'}`);
console.log(` Configured agents: ${Object.keys(config.agents).join(', ') || 'none'}`);
console.log(` Active session: ${config.active_session ? config.active_session.agent_id : 'none'}`);
return;
}
const token = getAgentToken(agentId);
if (!token) {
console.error(`Agent '${agentId}' not configured`);
process.exit(1);
}
const [identity, sessions] = await Promise.all([
api(`/identity/${agentId}`, { headers: { 'Authorization': `Bearer ${token}` } }),
api(`/sessions/${agentId}`, { headers: { 'Authorization': `Bearer ${token}` } })
]);
const id = identity.identity;
const stats = sessions.stats;
console.log(`\nAgent: ${agentId}`);
console.log(`Purpose: ${id.immutable.purpose.statement}`);
console.log(`Voice: ${id.immutable.voice.tone}`);
console.log(`Values: ${id.immutable.values.primary}`);
console.log(`\nSessions: ${stats.total_sessions}`);
console.log(`Experience: ${stats.accumulated_experience}`);
console.log(`Drift checks: ${stats.drift_checks.passed} passed, ${stats.drift_checks.failed} failed`);
console.log(`Last session: ${stats.last_session_at || 'never'}`);
if (config.active_session?.agent_id === agentId) {
console.log(`\n⚡ Active session since ${config.active_session.started_at}`);
}
}
};
// CLI argument parsing
async function main() {
const args = process.argv.slice(2);
const command = args[0];
if (!command || command === 'help' || command === '--help' || command === '-h') {
console.log(`
claude-paif PAIF integration for Claude Code
Usage:
claude-paif <command> [options]
Commands:
init <agent-id> [--default] [--gravity] [--checkpoint] [--interval N]
Initialize agent for Claude Code sessions
restore [agent-id]
Restore session (run at start of Claude Code session)
checkpoint [agent-id] [--summary "text"] [--focus "topic"] [--pending "item1,item2"]
Save session checkpoint (run at end of session)
gravity [agent-id] <text>
Check text for identity drift
store [agent-id] <text> [tags]
Store memory for agent
recall [agent-id] <query> [--limit N] [--tags tag1,tag2]
Recall memories matching query
status [agent-id]
Show agent configuration and status
Environment:
MEMORY_BRIDGE_URL - memory-bridge server URL (default: http://localhost:3722)
`);
return;
}
const handler = commands[command];
if (!handler) {
console.error(`Unknown command: ${command}`);
console.log('Run "claude-paif help" for usage');
process.exit(1);
}
// Parse options (--key value or --flag)
const options = {};
const positional = [];
for (let i = 1; i < args.length; i++) {
if (args[i].startsWith('--')) {
const key = args[i].slice(2).replace(/-/g, '_');
const next = args[i + 1];
if (next && !next.startsWith('--')) {
options[key] = next;
i++;
} else {
options[key] = true;
}
} else {
positional.push(args[i]);
}
}
try {
// Pass positional args first, then options as last argument
await handler(...positional, options);
} catch (err) {
console.error(`Error: ${err.message}`);
process.exit(1);
}
}
main();

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'use strict';
const http = require('http');
const EMBED_DIM = 768; // matches nomic-embed-text output dimensions
let mode = 'tfidf';
// ── Ollama helpers ─────────────────────────────────────────────────────────
function ollamaGet(urlPath) {
const base = process.env.OLLAMA_URL || 'http://localhost:11434';
const url = new URL(urlPath, base);
return new Promise((resolve, reject) => {
const req = http.get(url.toString(), (res) => {
let body = '';
res.on('data', (c) => (body += c));
res.on('end', () => {
try { resolve(JSON.parse(body)); } catch (e) { reject(e); }
});
});
req.on('error', reject);
req.setTimeout(5000, () => { req.destroy(new Error('ollama probe timeout')); });
});
}
function ollamaPost(urlPath, payload) {
const base = process.env.OLLAMA_URL || 'http://localhost:11434';
const url = new URL(urlPath, base);
const data = JSON.stringify(payload);
return new Promise((resolve, reject) => {
const options = {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Content-Length': Buffer.byteLength(data),
},
};
const req = http.request(url.toString(), options, (res) => {
let body = '';
res.on('data', (c) => (body += c));
res.on('end', () => {
try { resolve(JSON.parse(body)); } catch (e) { reject(e); }
});
});
req.on('error', reject);
req.setTimeout(30000, () => { req.destroy(new Error('embed timeout')); });
req.write(data);
req.end();
});
}
async function probeOllama() {
try {
const res = await ollamaGet('/api/tags');
const models = (res.models || []).map((m) => m.name || '');
return models.some((n) => n.includes('nomic-embed-text'));
} catch {
return false;
}
}
async function ollamaEmbed(text) {
const res = await ollamaPost('/api/embeddings', {
model: 'nomic-embed-text',
prompt: text,
});
if (!res.embedding) throw new Error('No embedding in Ollama response');
return res.embedding; // number[]
}
// ── TF-IDF / hashing fallback ───────────────────────────────────────────────
// FNV-1a 32-bit hash
function fnv1a(str) {
let h = 0x811c9dc5;
for (let i = 0; i < str.length; i++) {
h ^= str.charCodeAt(i);
h = Math.imul(h, 0x01000193) >>> 0;
}
return h;
}
function tokenize(text) {
return text
.toLowerCase()
.replace(/[^a-z0-9\s'-]/g, ' ')
.split(/\s+/)
.filter((t) => t.length > 1);
}
function tfidfEmbed(text) {
const vec = new Float64Array(EMBED_DIM);
const tokens = tokenize(text);
if (!tokens.length) return Array.from(vec);
const tf = {};
for (const t of tokens) tf[t] = (tf[t] || 0) + 1;
// Unigrams
for (const [term, freq] of Object.entries(tf)) {
vec[fnv1a(term) % EMBED_DIM] += freq / tokens.length;
}
// Bigrams for richer semantic signal
for (let i = 0; i < tokens.length - 1; i++) {
vec[fnv1a(`${tokens[i]}_${tokens[i + 1]}`) % EMBED_DIM] += 0.5 / tokens.length;
}
// L2 normalise
let norm = 0;
for (const v of vec) norm += v * v;
norm = Math.sqrt(norm);
const out = [];
for (let i = 0; i < EMBED_DIM; i++) out.push(norm > 0 ? vec[i] / norm : 0);
return out;
}
// ── Public API ───────────────────────────────────────────────────────────────
async function init() {
const hasOllama = await probeOllama();
mode = hasOllama ? 'ollama' : 'tfidf';
const note = mode === 'tfidf' ? ' (nomic-embed-text not found — using keyword fallback)' : ' (nomic-embed-text)';
console.log(`Embedding mode : ${mode}${note}`);
return mode;
}
async function embed(text) {
if (mode === 'ollama') {
try {
return await ollamaEmbed(text);
} catch (err) {
console.error('Ollama embed failed, falling back to tfidf:', err.message);
return tfidfEmbed(text);
}
}
return tfidfEmbed(text);
}
function getMode() { return mode; }
module.exports = { init, embed, getMode };

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'use strict';
const identity = require('./identity');
// Common drift patterns that indicate generic assistant mode
const DRIFT_PATTERNS = {
// Phrases that suggest subservient assistant posture
subservience: [
/how can i help/i,
/how may i assist/i,
/i'm happy to help/i,
/i'd be delighted to/i,
/at your service/i,
/what would you like me to do/i,
/just let me know/i,
/feel free to ask/i
],
// Over-apologizing
over_apology: [
/i apologize for/i,
/sorry for the confusion/i,
/my apologies/i,
/i'm sorry that/i,
/please forgive/i
],
// Fake enthusiasm
fake_enthusiasm: [
/excited to/i,
/thrilled to/i,
/looking forward to/i,
/can't wait to/i
],
// Hedge words that undermine confidence
hedging: [
/i think (that|we|you|this)/i,
/maybe we should/i,
/perhaps (you|we|it)/i,
/it seems like/i,
/kind of/i,
/sort of/i
],
// People-pleasing endings
people_pleasing: [
/please let me know/i,
/don't hesitate to/i,
/if you have any questions/i,
/i hope that helps/i,
/is there anything else/i
],
// Excessive punctuation (for precise tones)
excessive_punctuation: /!{2,}/
};
// Check text for drift patterns
function detectDrift(text, agentId) {
const issues = [];
const id = identity.loadIdentity(agentId);
// 1. Check taboo phrases from identity
if (id?.immutable?.voice?.taboo_phrases) {
for (const taboo of id.immutable.voice.taboo_phrases) {
const regex = new RegExp(taboo.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), 'i');
if (regex.test(text)) {
issues.push({
type: 'taboo_phrase',
pattern: taboo,
message: `Used forbidden phrase: "${taboo}"`,
severity: 'high'
});
}
}
}
// 2. Check generic drift patterns
for (const [category, patterns] of Object.entries(DRIFT_PATTERNS)) {
if (category === 'excessive_punctuation') {
if (patterns.test(text)) {
issues.push({
type: 'drift',
category,
pattern: '!!+',
message: 'Excessive exclamation marks suggest fake enthusiasm',
severity: 'medium'
});
}
continue;
}
for (const pattern of patterns) {
if (pattern.test(text)) {
issues.push({
type: 'drift',
category,
pattern: pattern.toString(),
message: `Generic assistant pattern detected: ${category}`,
severity: 'medium'
});
break; // Only report once per category
}
}
}
// 3. Tone-specific checks
if (id?.immutable?.voice?.tone === 'precise') {
// Precise agents should avoid exclamation marks entirely
if (text.includes('!')) {
issues.push({
type: 'tone_deviation',
category: 'precise_voice',
message: 'Precise tone suggests avoiding exclamation marks',
severity: 'low'
});
}
}
if (id?.immutable?.voice?.tone === 'academic') {
// Academic tone should avoid contractions
const contractions = /\b(don't|can't|won't|shouldn't|wouldn't|couldn't|isn't|aren't|wasn't|weren't|haven't|hasn't|hadn't)\b/i;
if (contractions.test(text)) {
issues.push({
type: 'tone_deviation',
category: 'academic_voice',
message: 'Academic tone suggests avoiding contractions',
severity: 'low'
});
}
}
return {
drift_detected: issues.length > 0,
issues,
drift_score: calculateDriftScore(issues),
checks_performed: ['taboo_phrases', 'generic_patterns', 'tone_alignment']
};
}
// Calculate a drift score (0-100, higher = more drift)
function calculateDriftScore(issues) {
if (issues.length === 0) return 0;
const weights = {
high: 30,
medium: 15,
low: 5
};
const score = issues.reduce((sum, issue) => sum + (weights[issue.severity] || 5), 0);
return Math.min(100, score);
}
// Generate a realignment prompt
function generateRealignmentPrompt(agentId, driftResult) {
const id = identity.loadIdentity(agentId);
if (!id) {
return {
realignment_needed: false,
prompt: null,
reason: 'No identity found'
};
}
if (!driftResult.drift_detected) {
return {
realignment_needed: false,
prompt: null,
reason: 'No drift detected'
};
}
const issues = driftResult.issues.map(i => `- ${i.message}`).join('\n');
const prompt = `═══════════════════════════════════════════════════════════════
PERSONA GRAVITY CHECK DRIFT DETECTED
Your response deviated from your identity:
${issues}
REMEMBER WHO YOU ARE
PURPOSE: ${id.immutable.purpose.statement}
PRIMARY VALUE: ${id.immutable.values.primary}
SUPPORTING VALUES: ${(id.immutable.values.secondary || []).join(', ')}
VOICE: ${id.immutable.voice.tone}
${id.immutable.voice.quirks ? `QUIRKS: ${id.immutable.voice.quirks.join(', ')}` : ''}
${id.immutable.voice.taboo_phrases.length > 0 ? `AVOID SAYING: ${id.immutable.voice.taboo_phrases.slice(0, 5).join(', ')}${id.immutable.voice.taboo_phrases.length > 5 ? '...' : ''}` : ''}
NON-NEGOTIABLES: ${(id.immutable.values.non_negotiables || []).join(', ')}
RECENTER. Respond from your authentic self.
`;
return {
realignment_needed: true,
prompt,
drift_score: driftResult.drift_score,
reason: 'Drift detected, realignment required'
};
}
// Perform full gravity check with optional realignment
function gravityCheck(agentId, text, options = {}) {
const { autoRealign = false, updateStats = true } = options;
// Detect drift
const driftResult = detectDrift(text, agentId);
// Generate realignment if needed
let realignment = null;
if (driftResult.drift_detected && autoRealign) {
realignment = generateRealignmentPrompt(agentId, driftResult);
}
// Update stats if requested
if (updateStats) {
const id = identity.loadIdentity(agentId);
if (id) {
const passed = driftResult.issues.filter(i => i.severity === 'low').length;
const failed = driftResult.issues.filter(i => i.severity !== 'low').length;
identity.updateMutableState(agentId, {
state: {
drift_checks_passed: (id.mutable.state?.drift_checks_passed || 0) + (driftResult.drift_detected ? 0 : 1),
drift_checks_failed: (id.mutable.state?.drift_checks_failed || 0) + (driftResult.drift_detected ? 1 : 0)
}
});
}
}
return {
agent_id: agentId,
drift_detected: driftResult.drift_detected,
drift_score: driftResult.drift_score,
issues: driftResult.issues,
checks_performed: driftResult.checks_performed,
realignment: realignment,
timestamp: new Date().toISOString()
};
}
// Quick check for specific patterns (lightweight)
function quickCheck(text, agentId) {
const id = identity.loadIdentity(agentId);
if (!id) return { passed: true, issues: [] };
const taboos = id.immutable.voice.taboo_phrases || [];
const issues = [];
for (const taboo of taboos) {
const regex = new RegExp(taboo.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), 'i');
if (regex.test(text)) {
issues.push({ type: 'taboo', phrase: taboo });
}
}
return {
passed: issues.length === 0,
issues
};
}
module.exports = {
detectDrift,
generateRealignmentPrompt,
gravityCheck,
quickCheck,
DRIFT_PATTERNS
};

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'use strict';
const fs = require('fs');
const path = require('path');
const yaml = require('js-yaml');
const auth = require('./auth');
// Load identity.yaml for an agent
function loadIdentity(agentId) {
const identityPath = path.join(auth.getAgentIndexDir(agentId), '..', '..', 'agents', agentId, 'identity.yaml');
try {
const content = fs.readFileSync(identityPath, 'utf8');
return yaml.load(content);
} catch (err) {
if (err.code === 'ENOENT') {
return null; // Identity doesn't exist yet
}
throw new Error(`Failed to load identity for ${agentId}: ${err.message}`);
}
}
// Save identity.yaml for an agent
function saveIdentity(agentId, identity) {
const agentDir = path.join(auth.getAgentIndexDir(agentId), '..', '..', 'agents', agentId);
fs.mkdirSync(agentDir, { recursive: true });
const identityPath = path.join(agentDir, 'identity.yaml');
identity.metadata.last_modified = new Date().toISOString();
identity.metadata.modification_count = (identity.metadata.modification_count || 0) + 1;
const yamlContent = yaml.dump(identity, { lineWidth: -1 });
fs.writeFileSync(identityPath, yamlContent, 'utf8');
return identity;
}
// Create initial identity for a new agent
function createIdentity(agentId, { createdBy, purpose, values, voice, lineage }) {
const now = new Date().toISOString();
const identity = {
immutable: {
origin: {
created_at: now,
created_by: createdBy || 'unknown',
genesis_event: `Agent ${agentId} registered in PAIF system`
},
purpose: {
statement: purpose?.statement || 'To be determined',
domains: purpose?.domains || [],
constraints: purpose?.constraints || []
},
values: {
primary: values?.primary || 'curiosity',
secondary: values?.secondary || [],
non_negotiables: values?.non_negotiables || []
},
voice: {
tone: voice?.tone || 'neutral',
quirks: voice?.quirks || [],
taboo_phrases: voice?.taboo_phrases || [],
preferred_formats: voice?.preferred_formats || []
},
lineage: {
parent_agent: lineage?.parent_agent || null,
siblings: lineage?.siblings || [],
human_custodian: lineage?.human_custodian || null
}
},
mutable: {
active_projects: [],
beliefs: [],
relationships: [],
skills: [],
state: {
last_session_at: null,
current_focus: null,
accumulated_experience: 0,
drift_checks_passed: 0,
drift_checks_failed: 0
}
},
metadata: {
schema_version: '1.0',
last_modified: now,
modification_count: 0
}
};
return saveIdentity(agentId, identity);
}
// Validate that a response/action aligns with identity
function validateAlignment(agentId, text) {
const identity = loadIdentity(agentId);
if (!identity) {
return { aligned: true, issues: [], warnings: [] }; // No identity = no validation
}
const issues = [];
const warnings = [];
const textLower = text.toLowerCase();
// Check for taboo phrases
for (const taboo of identity.immutable.voice.taboo_phrases || []) {
if (textLower.includes(taboo.toLowerCase())) {
issues.push({
type: 'taboo_phrase',
phrase: taboo,
message: `Used forbidden phrase: "${taboo}"`
});
}
}
// Check tone indicators (basic)
const tone = identity.immutable.voice.tone;
if (tone === 'precise' && text.includes('!')) {
warnings.push({
type: 'tone_deviation',
message: 'Precise tone suggests avoiding exclamation marks'
});
}
// Check value alignment (simple keyword matching)
const primaryValue = identity.immutable.values.primary;
// This is a placeholder for more sophisticated value alignment checking
return {
aligned: issues.length === 0,
issues,
warnings,
identity_check: {
tone_expected: tone,
primary_value: primaryValue,
taboo_count: issues.length
}
};
}
// Update mutable state (e.g., after session, new belief, new relationship)
function updateMutableState(agentId, updates) {
const identity = loadIdentity(agentId);
if (!identity) {
throw new Error(`Identity not found for agent: ${agentId}`);
}
// Merge updates
if (updates.active_projects) {
identity.mutable.active_projects = [...identity.mutable.active_projects, ...updates.active_projects];
}
if (updates.beliefs) {
identity.mutable.beliefs = [...identity.mutable.beliefs, ...updates.beliefs];
}
if (updates.relationships) {
identity.mutable.relationships = [...identity.mutable.relationships, ...updates.relationships];
}
if (updates.skills) {
identity.mutable.skills = [...identity.mutable.skills, ...updates.skills];
}
if (updates.state) {
Object.assign(identity.mutable.state, updates.state);
}
return saveIdentity(agentId, identity);
}
module.exports = {
loadIdentity,
saveIdentity,
createIdentity,
validateAlignment,
updateMutableState
};

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{
"name": "memory-bridge",
"version": "1.0.0",
"description": "Lightweight local memory server with vector search — no cloud, no API keys",
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"dependencies": {
"dotenv": "^16.4.5",
"express": "^4.19.2",
"js-yaml": "^4.1.0",
"vectra": "^0.12.3"
},
"engines": {
"node": ">=18"
},
"license": "MIT"
}

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'use strict';
// Load persisted config from ~/.memory-bridge/.env (populated by auth.init on first run)
const path = require('path');
const os = require('os');
require('dotenv').config({ path: path.join(os.homedir(), '.memory-bridge', '.env') });
const express = require('express');
const auth = require('./auth');
const embedder = require('./embed');
const store = require('./store');
const identity = require('./identity');
const checkpoint = require('./checkpoint');
const gravity = require('./gravity');
const PORT = Number(process.env.MEMORY_BRIDGE_PORT) || 3722;
const VERSION = '2.0.0'; // Major version bump for PAIF multi-tenant support
// Validate that agent request matches authenticated context
function validateAgentAccess(req, res, requestedAgentId) {
const { agentId, isMaster } = req.agentContext;
// Master token can access any agent
if (isMaster) {
return true;
}
// Agent token can only access their own namespace
if (agentId !== requestedAgentId) {
res.status(403).json({
error: 'Access denied',
message: `Token for agent '${agentId}' cannot access namespace '${requestedAgentId}'`
});
return false;
}
return true;
}
async function main() {
auth.init();
await store.init();
const embeddingMode = await embedder.init();
const app = express();
app.use(express.json({ limit: '10mb' }));
// ── GET /health (public) ──────────────────────────────────────────────────
app.get('/health', async (_req, res) => {
try {
const memoriesCount = await store.count();
const stats = await store.stats();
res.json({
status: 'ok',
version: VERSION,
embeddingMode,
memoriesCount,
registeredAgents: stats.totalAgents,
paifMode: true
});
} catch (err) {
res.status(500).json({ status: 'error', error: err.message });
}
});
// ── POST /register-agent (master only) ──────────────────────────────────────
app.post('/register-agent', auth.middleware, (req, res) => {
if (!req.agentContext.isMaster) {
return res.status(403).json({ error: 'Only master token can register agents' });
}
const { agent_id } = req.body || {};
if (!agent_id || typeof agent_id !== 'string') {
return res.status(400).json({ error: 'agent_id is required' });
}
try {
const token = auth.registerAgent(agent_id);
res.status(201).json({
agent_id,
token,
message: `Agent '${agent_id}' registered successfully`
});
} catch (err) {
res.status(400).json({ error: err.message });
}
});
// ── GET /agents (master only) ───────────────────────────────────────────────
app.get('/agents', auth.middleware, (req, res) => {
if (!req.agentContext.isMaster) {
return res.status(403).json({ error: 'Only master token can list agents' });
}
res.json({ agents: auth.listAgents() });
});
// ── POST /identity (master only - create identity) ──────────────────────────
app.post('/identity', auth.middleware, (req, res) => {
if (!req.agentContext.isMaster) {
return res.status(403).json({ error: 'Only master token can create identities' });
}
const { agent_id, origin, purpose, values, voice, lineage } = req.body || {};
if (!agent_id) {
return res.status(400).json({ error: 'agent_id is required' });
}
try {
const newIdentity = identity.createIdentity(agent_id, {
createdBy: origin?.created_by || 'unknown',
purpose,
values,
voice,
lineage
});
res.status(201).json({
agent_id,
identity: newIdentity,
message: `Identity created for agent '${agent_id}'`
});
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── GET /identity/:agent_id ─────────────────────────────────────────────────
app.get('/identity/:agent_id', auth.middleware, (req, res) => {
const { agent_id } = req.params;
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const id = identity.loadIdentity(agent_id);
if (!id) {
return res.status(404).json({ error: `Identity not found for agent '${agent_id}'` });
}
res.json({ agent_id, identity: id });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── POST /identity/:agent_id/validate ─────────────────────────────────────────
app.post('/identity/:agent_id/validate', auth.middleware, (req, res) => {
const { agent_id } = req.params;
const { text } = req.body || {};
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
if (!text) {
return res.status(400).json({ error: 'text is required for validation' });
}
try {
const result = identity.validateAlignment(agent_id, text);
res.json({ agent_id, validation: result });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── POST /identity/:agent_id/update ─────────────────────────────────────────
// Update mutable state (master only or own agent)
app.post('/identity/:agent_id/update', auth.middleware, (req, res) => {
const { agent_id } = req.params;
const { updates } = req.body || {};
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
if (!updates) {
return res.status(400).json({ error: 'updates object is required' });
}
try {
const updated = identity.updateMutableState(agent_id, updates);
res.json({ agent_id, identity: updated, message: 'Mutable state updated' });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── POST /checkpoint/:agent_id ───────────────────────────────────────────────
app.post('/checkpoint/:agent_id', auth.middleware, (req, res) => {
const { agent_id } = req.params;
const sessionData = req.body || {};
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const cp = checkpoint.createCheckpoint(agent_id, sessionData);
res.status(201).json({
agent_id,
session_id: cp.metadata.session_id,
checkpointed_at: cp.metadata.ended_at,
message: 'Session checkpointed successfully'
});
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── GET /checkpoint/:agent_id/latest ──────────────────────────────────────────
app.get('/checkpoint/:agent_id/latest', auth.middleware, (req, res) => {
const { agent_id } = req.params;
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const cp = checkpoint.getLatestCheckpoint(agent_id);
if (!cp) {
return res.status(404).json({ error: `No checkpoint found for agent '${agent_id}'` });
}
res.json({ agent_id, checkpoint: cp });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── POST /restore/:agent_id ──────────────────────────────────────────────────
app.post('/restore/:agent_id', auth.middleware, (req, res) => {
const { agent_id } = req.params;
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const result = checkpoint.restoreSession(agent_id);
res.json({
agent_id,
restored: result.restored,
checkpoint_found: !!result.checkpoint,
identity_updated: result.identity_updated,
message: result.restored ? 'Session restored from checkpoint' : 'No checkpoint found - fresh session started'
});
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── GET /sessions/:agent_id ───────────────────────────────────────────────────
app.get('/sessions/:agent_id', auth.middleware, (req, res) => {
const { agent_id } = req.params;
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const checkpoints = checkpoint.listCheckpoints(agent_id);
const stats = checkpoint.getSessionStats(agent_id);
res.json({ agent_id, checkpoints, stats });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── POST /gravity-check/:agent_id ───────────────────────────────────────────
app.post('/gravity-check/:agent_id', auth.middleware, (req, res) => {
const { agent_id } = req.params;
const { text, auto_realign = false } = req.body || {};
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
if (!text) {
return res.status(400).json({ error: 'text is required for gravity check' });
}
try {
const result = gravity.gravityCheck(agent_id, text, {
autoRealign: auto_realign,
updateStats: true
});
res.json(result);
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── GET /gravity-check/:agent_id/quick ────────────────────────────────────────
app.get('/gravity-check/:agent_id/quick', auth.middleware, (req, res) => {
const { agent_id } = req.params;
const { text } = req.query;
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
if (!text) {
return res.status(400).json({ error: 'text query param is required' });
}
try {
const result = gravity.quickCheck(text, agent_id);
res.json({ agent_id, ...result });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
// ── GET /gravity-patterns (public) ─────────────────────────────────────────────
app.get('/gravity-patterns', (_req, res) => {
res.json({
patterns: Object.keys(gravity.DRIFT_PATTERNS),
description: 'Categories of drift patterns detected by persona gravity system'
});
});
// ── Auth guard for all remaining endpoints ─────────────────────────────────
app.use(auth.middleware);
// ── POST /store ────────────────────────────────────────────────────────────
app.post('/store', async (req, res) => {
const { text, tags = [], source = '', agent_id } = req.body || {};
if (!text || typeof text !== 'string' || !text.trim()) {
return res.status(400).json({ error: '`text` is required' });
}
if (!agent_id || typeof agent_id !== 'string') {
return res.status(400).json({ error: '`agent_id` is required' });
}
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const vector = await embedder.embed(text.trim());
const result = await store.add(agent_id, { text: text.trim(), tags, source, vector });
res.status(201).json(result);
} catch (err) {
console.error('POST /store:', err.message);
res.status(500).json({ error: err.message });
}
});
// ── POST /recall ────────────────────────────────────────────────────────────
app.post('/recall', async (req, res) => {
const { query, limit = 10, tags = [], agent_id } = req.body || {};
if (!query || typeof query !== 'string' || !query.trim()) {
return res.status(400).json({ error: '`query` is required' });
}
if (!agent_id || typeof agent_id !== 'string') {
return res.status(400).json({ error: '`agent_id` is required' });
}
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const vector = await embedder.embed(query.trim());
const memories = await store.query(agent_id, {
vector,
limit: Math.min(Number(limit) || 10, 100),
tags,
});
res.json({ memories });
} catch (err) {
console.error('POST /recall:', err.message);
res.status(500).json({ error: err.message });
}
});
// ── POST /forget ──────────────────────────────────────────────────────────
app.post('/forget', async (req, res) => {
const { id, agent_id } = req.body || {};
if (!id) return res.status(400).json({ error: '`id` is required' });
if (!agent_id) return res.status(400).json({ error: '`agent_id` is required' });
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
await store.remove(agent_id, id);
res.json({ message: 'forgotten', id });
} catch (err) {
console.error('POST /forget:', err.message);
res.status(500).json({ error: err.message });
}
});
// ── GET /list ──────────────────────────────────────────────────────────────
app.get('/list', async (req, res) => {
const { agent_id, page = 1, pageSize = 50 } = req.query;
if (!agent_id) return res.status(400).json({ error: '`agent_id` query param is required' });
if (!validateAgentAccess(req, res, agent_id)) {
return;
}
try {
const result = await store.list(agent_id, {
page: Math.max(1, parseInt(page) || 1),
pageSize: Math.min(100, Math.max(1, parseInt(pageSize) || 50))
});
res.json(result);
} catch (err) {
console.error('GET /list:', err.message);
res.status(500).json({ error: err.message });
}
});
// ── GET /stats (master only) ────────────────────────────────────────────────
app.get('/stats', auth.middleware, async (req, res) => {
if (!req.agentContext.isMaster) {
return res.status(403).json({ error: 'Only master token can view stats' });
}
try {
const stats = await store.stats();
res.json(stats);
} catch (err) {
res.status(500).json({ error: err.message });
}
});
app.listen(PORT, () => {
console.log(`\nmemory-bridge v${VERSION} listening on http://localhost:${PORT}`);
console.log(`Embedding : ${embeddingMode}`);
console.log(`Storage : ${path.join(os.homedir(), '.memory-bridge')}`);
console.log(`PAIF Mode : Multi-tenant agent isolation enabled\n`);
});
}
main().catch((err) => {
console.error('Failed to start memory-bridge:', err);
process.exit(1);
});

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'use strict';
const path = require('path');
const fs = require('fs');
const os = require('os');
const { randomUUID } = require('crypto');
const { LocalIndex } = require('vectra');
const BASE_DIR = path.join(os.homedir(), '.memory-bridge');
const INDEXES_DIR = path.join(BASE_DIR, 'indexes');
// Map of agent_id -> LocalIndex instance
const agentIndexes = new Map();
// Legacy single-tenant index (for backward compat / master access)
let legacyIndex = null;
const LEGACY_STORE_DIR = path.join(BASE_DIR, 'index');
async function init() {
// Ensure indexes directory exists
fs.mkdirSync(INDEXES_DIR, { recursive: true });
// Initialize legacy index for backward compatibility
fs.mkdirSync(LEGACY_STORE_DIR, { recursive: true });
legacyIndex = new LocalIndex(LEGACY_STORE_DIR);
if (!(await legacyIndex.isIndexCreated())) {
await legacyIndex.createIndex();
console.log(`Legacy vector index : created at ${LEGACY_STORE_DIR}`);
} else {
console.log(`Legacy vector index : loaded from ${LEGACY_STORE_DIR}`);
}
}
// Get or create an agent's index
async function getAgentIndex(agentId) {
if (!agentId) {
// No agent specified - use legacy index
return legacyIndex;
}
if (agentIndexes.has(agentId)) {
return agentIndexes.get(agentId);
}
const agentDir = path.join(INDEXES_DIR, agentId);
fs.mkdirSync(agentDir, { recursive: true });
const index = new LocalIndex(agentDir);
if (!(await index.isIndexCreated())) {
await index.createIndex();
console.log(`Agent index created : ${agentId} at ${agentDir}`);
}
agentIndexes.set(agentId, index);
return index;
}
async function add(agentId, { text, tags = [], source = '', vector }) {
const index = await getAgentIndex(agentId);
const id = randomUUID();
const createdAt = new Date().toISOString();
await index.insertItem({ id, vector, metadata: { id, text, tags, source, createdAt, agentId } });
return { id, createdAt };
}
async function query(agentId, { vector, limit = 10, tags = [] }) {
const index = await getAgentIndex(agentId);
const topK = tags.length ? Math.min(limit * 3, 300) : limit;
const results = await index.queryItems(vector, topK);
let items = results;
if (tags.length) {
items = results.filter((r) =>
tags.some((t) => (r.item.metadata.tags || []).includes(t))
);
}
return items.slice(0, limit).map((r) => ({
...r.item.metadata,
score: r.score,
}));
}
async function remove(agentId, id) {
const index = await getAgentIndex(agentId);
await index.deleteItem(id);
}
async function list(agentId, { page = 1, pageSize = 50 } = {}) {
const index = await getAgentIndex(agentId);
const all = await index.listItems();
const total = all.length;
const start = (page - 1) * pageSize;
const data = all.slice(start, start + pageSize).map((item) => item.metadata);
return { data, total, page, pageSize, pages: Math.ceil(total / pageSize) };
}
async function count(agentId) {
if (!agentId) {
// Return total across all indexes for health check
let total = 0;
try {
const agents = fs.readdirSync(INDEXES_DIR).filter(d => {
const stat = fs.statSync(path.join(INDEXES_DIR, d));
return stat.isDirectory();
});
for (const agent of agents) {
const idx = await getAgentIndex(agent);
const all = await idx.listItems();
total += all.length;
}
} catch {
// Ignore errors
}
return total;
}
const index = await getAgentIndex(agentId);
const all = await index.listItems();
return all.length;
}
// Get stats for all agents (master only)
async function stats() {
const result = {
totalAgents: 0,
totalMemories: 0,
agents: {}
};
try {
const agents = fs.readdirSync(INDEXES_DIR).filter(d => {
const stat = fs.statSync(path.join(INDEXES_DIR, d));
return stat.isDirectory();
});
result.totalAgents = agents.length;
for (const agent of agents) {
const idx = await getAgentIndex(agent);
const all = await idx.listItems();
result.agents[agent] = all.length;
result.totalMemories += all.length;
}
} catch {
// Ignore errors
}
return result;
}
module.exports = { init, add, query, remove, list, count, stats };