wx-cli-wechat-local-data

Imported from reason-machines/trending-skills (skills/wx-cli-wechat-local-data/SKILL.md). Install upstream with npx skills add reason-machines/trending-skills --skill wx-cli-wechat-local-data. Copyright stays with the author.

---
name: wx-cli-wechat-local-data
description: Query local WeChat data from the command line using a Rust daemon with SQLCipher decryption
triggers:
  - query my WeChat messages
  - search WeChat chat history
  - get WeChat contacts from CLI
  - read local WeChat data
  - wx-cli setup and usage
  - decrypt WeChat database
  - WeChat unread messages command line
  - export WeChat chat history
---

# wx-cli — WeChat Local Data CLI

> Skill by [ara.so](https://ara.so) — Daily 2026 Skills collection.

`wx-cli` is a Rust-based CLI tool that queries your local WeChat data (messages, contacts, groups, favorites, stats) by scanning the WeChat process memory for SQLCipher keys and decrypting the local databases via a persistent background daemon.

---

## Architecture

wx (CLI) ──Unix socket──▶ wx-daemon (background process) │ ┌─────────┴──────────┐ DBCache Contact Cache (mtime-aware reuse)

- Daemon decrypts WeChat's SQLCipher 4 databases on first use, caches them in `~/.wx-cli/cache/`
- Subsequent calls reuse cached DBs if mtime is unchanged — millisecond responses
- All data stays local; no network calls

---

## Installation

### npm (recommended, all platforms)
```bash
npm install -g @jackwener/wx-cli

macOS / Linux (curl)

curl -fsSL https://raw.githubusercontent.com/jackwener/wx-cli/main/install.sh | bash

Windows (PowerShell as Administrator)

irm https://raw.githubusercontent.com/jackwener/wx-cli/main/install.ps1 | iex

Build from source

git clone git@github.com:jackwener/wx-cli.git && cd wx-cli
cargo build --release
# Binary: target/release/wx  (Windows: wx.exe)
sudo mv target/release/wx /usr/local/bin/

Initial Setup (one-time)

WeChat must be running and logged in before initializing.

macOS

# 1. Re-sign WeChat so wx-cli can read its memory (redo after WeChat updates)
codesign --force --deep --sign - /Applications/WeChat.app

# If you get "signature in use" error:
codesign --remove-signature "/Applications/WeChat.app/Contents/Frameworks/vlc_plugins/librtp_mpeg4_plugin.dylib"
codesign --force --deep --sign - /Applications/WeChat.app

# 2. Restart WeChat and wait for full login
killall WeChat && open /Applications/WeChat.app

# 3. Initialize (extracts encryption keys from memory)
sudo wx init

Linux

sudo wx init

Windows (Admin PowerShell)

wx init

Verify

wx sessions   # Should show recent conversations

Key Commands

Sessions & Messages

# Recent 20 sessions
wx sessions

# Sessions with unread messages
wx unread

# Filter by type: private, group, official_account, folded
wx unread --filter private,group

# New messages since last check (incremental)
wx new-messages

# Chat history (last 50 messages)
wx history "张三"

# Chat history with date range
wx history "AI群" --since 2026-04-01 --until 2026-04-15

# Full-text search across all chats
wx search "关键词"

# Search within a specific chat with date filter
wx search "会议" --in "工作群" --since 2026-01-01

Contacts & Groups

# All contacts
wx contacts

# Search contacts by name
wx contacts --query "李"

# List group members
wx members "AI交流群"

Favorites & Stats

# All favorites
wx favorites

# Filter favorites by type: text, image, article, card, video
wx favorites --type image

# Search favorites
wx favorites --query "关键词"

# Chat statistics
wx stats "AI群"

# Stats with date range
wx stats "AI群" --since 2026-01-01

Export

# Export to Markdown
wx export "张三" --format markdown -o chat.md

# Export group chat as JSON with date range
wx export "AI群" --since 2026-01-01 --format json

Output Formats

# Default: YAML (token-efficient, human-readable)
wx sessions

# JSON output (for jq piping)
wx sessions --json
wx search "关键词" --json | jq '.[0].content'
wx new-messages --json
wx history "张三" --json | jq '[.[] | select(.sender == "张三")]'

Daemon Management

wx daemon status
wx daemon stop
wx daemon logs --follow

chat_type Values

All session/message output includes a chat_type field:

File Structure

~/.wx-cli/
├── config.json       # Configuration
├── all_keys.json     # Database encryption keys
├── daemon.sock       # Unix socket (Linux/macOS)
├── daemon.pid        # Daemon PID file
├── daemon.log        # Daemon log file
└── cache/
    ├── _mtimes.json  # mtime index for cache invalidation
    └── *.db          # Decrypted SQLite databases

Common Patterns for AI Agents

Monitor new messages in a loop

while true; do
  wx new-messages --json | jq '.[] | "\(.sender): \(.content)"'
  sleep 30
done

Get unread count by type

wx unread --json | jq 'group_by(.chat_type) | map({type: .[0].chat_type, count: length})'

Export all private chats since a date

wx contacts --json | jq -r '.[].name' | while read name; do
  wx export "$name" --since 2026-01-01 --format markdown -o "exports/${name}.md"
done

Search and format results

wx search "项目" --in "工作群" --json | jq '[.[] | {time: .timestamp, sender: .sender, msg: .content}]'

Check daemon health and restart if needed

if ! wx daemon status | grep -q "running"; then
  sudo wx init
fi

How It Works (Technical)

WeChat 4.x encrypts local databases with SQLCipher 4 (AES-256-CBC + HMAC-SHA512, PBKDF2 256,000 iterations). WCDB caches the derived raw key in process memory as x'<64hex_key><32hex_salt>'.

wx-cli extracts keys by:

• macOS: Mach VM API (mach_vm_region + mach_vm_read) — requires sudo and ad-hoc code signature
• Linux: /proc/<pid>/mem scanning — requires sudo
• Windows: Windows memory API — requires Administrator

The daemon then decrypts databases on demand and caches them with mtime tracking.

Troubleshooting

"signature in use" on macOS codesign

codesign --remove-signature "/Applications/WeChat.app/Contents/Frameworks/vlc_plugins/librtp_mpeg4_plugin.dylib"
codesign --force --deep --sign - /Applications/WeChat.app

Daemon not starting / no sessions returned

# Check daemon logs
wx daemon logs

# Ensure WeChat is running and logged in, then re-init
wx daemon stop
sudo wx init
wx sessions

Stale cache after WeChat update

# Stop daemon to clear in-memory state
wx daemon stop
# Re-sign WeChat if updated
codesign --force --deep --sign - /Applications/WeChat.app
# Re-initialize
sudo wx init

Permission denied on Linux

# wx init requires root to read /proc/<pid>/mem
sudo wx init

Cache not updating (messages seem stale)

# Cache invalidates automatically on DB mtime change
# Force refresh by stopping daemon
wx daemon stop
wx sessions   # Daemon auto-restarts and re-reads

AI Agent Integration (skills CLI)

# Install skill for Claude Code / Cursor / Codex
npx skills add jackwener/wx-cli

# Install globally
npx skills add jackwener/wx-cli -g

After installation, the agent reads SKILL.md automatically to understand wx-cli usage.