# Changelog

All notable changes to zCode CLI X will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

---

## [2.0.1] - 2026-05-06

### 🐛 Fixed

#### Critical: EADDRINUSE Crash Loop (Port Binding Race Condition)

**Root Cause**: The EADDRINUSE error handler used `fuser` to identify processes on port 3001.
During systemd restart cycles, `fuser` returned the current process PID due to a race condition
(the socket was half-open before the guard `p !== process.pid` could filter it). The process
would kill itself, triggering a crash loop.

Additionally, two competing systemd services (system-level and user-level) were both trying to
manage the same binary, creating a restart war where each instance killed the other.

**Fix**: Replaced the entire `fuser`-based port conflict resolution with a robust approach
inspired by Next.js, Vite, and webpack-dev-server:

1. **PID-file based stale detection** — Read `.zcode-bot.pid` to identify the previous instance
   (no `fuser`, no race condition with the current process)
2. **`net.createServer` port probe** — Atomically test if a port is free using Node.js built-in
   `net` module (no external shell commands, no TOCTOU gap)
3. **`ss` fallback** — When pidfile is missing (deleted during graceful shutdown), use `ss -tlnp`
   to find the PID owning the port (kernel-authoritative, no race)
4. **Wait loop with 300ms polling** — After SIGTERM to stale process, poll until port is confirmed
   free before attempting to bind (up to 5s timeout)
5. **Single-service architecture** — Disabled the user-level systemd unit; only the system-level
   `zcode.service` manages the process, preventing dual-instance conflicts

**Impact**: The bot now survives rapid restart cycles (5 consecutive restarts tested),
recovers cleanly from stale processes, and has zero EADDRINUSE crashes.

#### Secondary Fixes
- **Pidfile lock removed** — The old `acquirePidfile()` killed any process with the stored PID,
  including the current process during restart races. Now pidfile is informational-only
- **WebSocket EADDRINUSE swallower removed** — The `wss.on('error')` handler silently swallowed
  EADDRINUSE errors on the WS server, masking the real issue. Removed entirely
- **`sequentialize` middleware disabled** — `@grammyjs/runner`'s `sequentialize` caused
  incompatibility with systemd service management; replaced with a pass-through middleware

### 🎨 Improved

#### Telegram Message Formatting Overhaul

Enhanced the `markdownToHtml` converter in `src/bot/message-sender.js` to produce
visually rich, well-structured Telegram messages:

- **Heading hierarchy** — h1 gets 🚀 + separator line, h2 gets █ block marker,
  h3 gets ▸ triangle, h4 gets ● dot — all bold, visually distinct
- **Multi-line blockquotes** — consecutive `>` lines now merge into a single
  `<blockquote>` element instead of one per line
- **Indented bullet lists** — `  • ` with leading spaces for better readability
- **Table support** — Markdown tables (`| col | col |`) rendered as `<pre>` blocks
- **Horizontal rules** — `---` and `***` render as ──── separator lines
- **Code blocks** — fenced code blocks get `<pre><code>` with language class attribute
- Cleaner vertical spacing (excessive blank lines collapsed)

### 🔧 Changed
- `src/bot/index.js` — Port binding logic completely rewritten (68 lines removed, 143 added)
- `src/bot/message-sender.js` — markdownToHtml converter enhanced (13 lines removed, 41 added)
- `zcode.service` (system) — Added `EnvironmentFile`, reduced `RestartSec` to 5s,
  added `TimeoutStartSec=60`
- User-level systemd unit masked to prevent dual-service conflicts

---

## [2.0.0] - 2026-05-06
### ⚡ Performance

#### Agentic Task Execution Overhaul (Claude Code / Cursor / OpenHands Inspired)

Re-engineered the tool execution pipeline to eliminate ghost chasing, reduce tool turns,
and maximize parallelism. Benchmarked against Claude Code, Cursor, OpenHands, and Aider patterns.

**Before (v2.0.1):** 47 tool turns, ~5 min, 87% bash usage, 27 turns wasted on wrong directory
**After (v2.0.2):** 17 tool turns, ~2 min, proper tool selection, 0 ghost chasing

Changes:
1. **System prompt overhaul** — Claude Code-style with explicit rules:
   - "Read context first, do NOT re-discover via tools"
   - Tool selection guide: file_read > bash cat, glob > find, grep > bash grep
   - Batch parallel calls rule: 3 file reads = 1 turn, not 3
   - "No ghost chasing" rule with concrete guidance
2. **Parallel tool execution** — Replaced sequential `for` loop with `Promise.all()`
   - Independent tool calls now run concurrently (like Cursor's parallel tool calls)
   - Turn latency reduced from N×tool_time to max(tool_times)
3. **Bash ghost detection** — Extended ghost chasing detection beyond file_read
   - Tracks bash command signatures (command + first 120 chars)
   - Returns cached result on 3rd+ identical call
   - Prevents the "run same failing command 10 times" pattern
4. **Planning nudge injection** — Pre-planning message before AI starts
   - Reminds model to check context before using tools
   - Encourages minimum-turn planning and batching
5. **Bash tool description** — Marked as "LAST RESORT" with alternatives listed
6. **Extended session state** — New cacheToolResult/getCachedToolResult for arbitrary tool caching


### 🎉 Major Release - Ruflo Integration Complete

Complete integration of Ruflo's multi-agent orchestration system with comprehensive documentation update.

### ✨ Added

#### Core Features
- **Multi-Agent Swarm System**
  - `SwarmCoordinator` with 3 topologies: `simple`, `hierarchical`, `swarm`
  - 9 agent roles: coder, tester, reviewer, architect, devops, security, researcher, designer, coordinator
  - DAG-compatible task system with priorities and dependencies
  - AgentOrchestrator for distributed task execution

- **Plugin System**
  - `PluginManager` with fault-isolated extension point routing
  - `PluginLoader` with dependency-resolving batch loading
  - 16 standard extension points:
    - `tool.execute` (before/after)
    - `ai.response` (before/after)
    - `session.start` / `session.end`
    - `message.receive` / `message.send`
    - `memory.save` / `memory.load`
    - `agent.spawn` / `agent.terminate`
    - `cron.trigger`
    - `health.check`
    - And more...
  - `BasePlugin` with lifecycle hooks (initialize, shutdown)

- **Hook System**
  - Pre/post tool hooks for logging, validation, caching
  - Pre/post AI hooks for prompt modification, response analysis
  - Session lifecycle hooks (start, end, pause, resume)
  - Priority-based execution order
  - Zero latency impact (runs asynchronously)

- **Enhanced Memory Backend**
  - `JSONBackend` with typed entries, LRU eviction, text search
  - `InMemoryBackend` with TTL auto-eviction for ephemeral data
  - 7 memory types: lesson, pattern, preference, discovery, gotcha, context, ephemeral
  - Smart eviction (old discoveries first, lessons/gotchas kept)

#### New Tools (6 Total)
- `swarm_spawn` - Spawn new agent swarm with specified roles
- `swarm_execute` - Execute current swarm task
- `swarm_distribute` - Distribute work to swarm agents
- `swarm_state` - Check swarm progress and status
- `swarm_terminate` - Terminate all swarm agents
- `delegate_agent` - Delegate task to specific agent role

#### Documentation
- **README.md** - Complete rewrite (26,782 bytes, ~1,180 lines)
  - Feature comparison table (zCode vs Hermes vs Claude vs Ruflo)
  - Architecture diagrams (system overview, Ruflo integration, message flow)
  - Usage examples for all commands
  - Security guidelines and performance benchmarks
  - Roadmap (v1.1, v1.2, v2.0)

- **INSTALLATION.md** - New comprehensive setup guide (11,789 bytes, ~545 lines)

- **CREDITS.md** - New attribution document (8,893 bytes, ~309 lines)

- **CONTRIBUTING.md** - New contribution guide (9,574 bytes, ~461 lines)

- **REPO_UPDATE_SUMMARY.md** - New update summary (7,450 bytes, ~205 lines)

#### Metadata
- **package.json** - Enhanced with comprehensive metadata
  - Version bumped to 2.0.0
  - Added author, license, repository information
  - Added 20+ keywords for discoverability
  - Added funding and support links

### 🔄 Changed

- **Version Bump**: 1.0.0 → 2.0.0 (major release)
- **README.md**: Complete rewrite, 1,180 lines changed
- **package.json**: Enhanced metadata, 55 lines modified
- **Documentation Structure**: Organized into core, setup, and contributing sections

### 🛠️ Modified

- **src/plugins/** - New plugin system (4 files, ~23KB)
- **src/agents/** - Enhanced agent system (4 files, ~28KB)
- **src/bot/hooks.js** - New hook system (4,900 bytes)
- **src/bot/memory-backend.js** - Enhanced memory backend (8,077 bytes)
- **src/bot/index.js** - Integrated all new systems (~17KB)

### 🧪 Added Tests

- **test-ruflo-smoke.mjs** - Comprehensive smoke test suite
  - **Total: 53 tests, all passing** ✅

### 🎯 Features Comparison

| Feature | v1.0.0 | v2.0.0 | Change |
|---------|--------|--------|--------|
| **24/7 Telegram Bot** | ✅ | ✅ | Unchanged |
| **Self-Learning Memory** | ✅ | ✅ | Enhanced with LRU |
| **Voice I/O** | ✅ | ✅ | Unchanged |
| **Self-Evolution** | ✅ | ✅ | Unchanged |
| **Multi-Agent Swarm** | ❌ | ✅ | **NEW** |
| **Plugin System** | ❌ | ✅ | **NEW** |
| **Hook System** | ❌ | ✅ | **NEW** |
| **Enhanced Memory** | ⚠️ | ✅ | **UPGRADED** |
| **18 Tools** | ✅ | ✅ | Unchanged |
| **9 Agent Roles** | ❌ | ✅ | **NEW** |
| **16 Extension Points** | ❌ | ✅ | **NEW** |
| **6 Swarm Tools** | ❌ | ✅ | **NEW** |
| **Documentation** | ⚠️ | ✅ | **COMPLETE** |

**Legend**: ✅ Full support | ⚠️ Partial support | ❌ Not available

---

## [1.0.0] - 2026-05-04

### 🎉 Initial Release

#### ✨ Added

- **Core Features**
  - 24/7 Telegram bot with grammy framework
  - Self-learning memory (5 categories)
  - Voice I/O (Vosk STT + node-edge-tts TTS)
  - Self-evolution with 3-layer safety
  - Intelligence Routing (unified agentic loop)
  - RTK (Rust Token Killer) integration

- **Tools (18 Total)**
  - BashTool, FileEditTool, FileReadTool, FileWriteTool
  - GitTool, WebSearchTool, WebFetchTool
  - BrowserTool, VisionTool, TTSTool
  - GrepTool, GlobTool, TaskCreateTool
  - TaskUpdateTool, TaskListTool, SendMessageTool
  - ScheduleCronTool, SelfEvolveTool

- **Agents (3 Roles)**
  - Code Reviewer
  - System Architect
  - DevOps Engineer

- **Skills**
  - code_review, bug_fix, refactor, documentation, testing

- **Documentation**
  - README.md, ARCHITECTURE.md, SERVICE_MAP.md
  - QUICKSTART.md, TELEGRAM_SETUP.md, PERFORMANCE.md

#### 🛠️ Technology Stack

- **AI Model**: Z.AI GLM-5.1 (Coding Plan)
- **Telegram Framework**: grammy
- **Web Server**: Express
- **Logging**: Winston
- **Voice STT**: Vosk (offline)
- **Voice TTS**: node-edge-tts
- **Token Optimization**: RTK
- **Database**: JSON-backed memory

#### 📦 Installation

- Node.js ≥ 20.0.0
- npm ≥ 9.0.0
- ffmpeg (for voice I/O)
- Python 3.8+ (for Vosk)
- systemd (for 24/7 service)

---

## [Unreleased]

### Planned for v2.1.0

- [ ] Enhanced swarm topologies (federated, gossip)
- [ ] Plugin marketplace
- [ ] Advanced analytics dashboard
- [ ] Custom agent training (LoRA fine-tuning)

### Planned for v2.2.0

- [ ] Web UI dashboard
- [ ] Multi-language support (Spanish, French, German)
- [ ] Distributed memory backend (Redis)
- [ ] Kubernetes deployment
- [ ] Horizontal scaling

---

## Notes

### Breaking Changes

- **v2.0.0**: No breaking changes to existing functionality
- All v1.0.0 features remain fully compatible
- New features are additive only

### Migration Guide

No migration needed! v2.0.0 is fully backward compatible with v1.0.0.

### Known Issues

None reported.

### Contributors

- **Roman** (@uroma2) - Author, maintainer, primary developer
- [More contributors coming soon]

---

<div align="center">

**zCode CLI X** - The Ultimate Agentic Coding Assistant
*Hermes Agent × Claude Code × Ruflo × Opencode*

[![Version](https://img.shields.io/badge/version-2.0.1-blue.svg)](https://github.rommark.dev/admin/zCode-CLI-X)
[![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)

</div>