feat(utils): add MessagePack TypeScript implementation

.beads/.gitignore

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+# SQLite databases
+*.db
+*.db?*
+*.db-journal
+*.db-wal
+*.db-shm
+
+# Daemon runtime files
+daemon.lock
+daemon.log
+daemon.pid
+bd.sock
+sync-state.json
+last-touched
+
+# Local version tracking (prevents upgrade notification spam after git ops)
+.local_version
+
+# Legacy database files
+db.sqlite
+bd.db
+
+# Worktree redirect file (contains relative path to main repo's .beads/)
+# Must not be committed as paths would be wrong in other clones
+redirect
+
+# Merge artifacts (temporary files from 3-way merge)
+beads.base.jsonl
+beads.base.meta.json
+beads.left.jsonl
+beads.left.meta.json
+beads.right.jsonl
+beads.right.meta.json
+
+# NOTE: Do NOT add negation patterns (e.g., !issues.jsonl) here.
+# They would override fork protection in .git/info/exclude, allowing
+# contributors to accidentally commit upstream issue databases.
+# The JSONL files (issues.jsonl, interactions.jsonl) and config files
+# are tracked by git by default since no pattern above ignores them.

.beads/README.md

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+# Beads - AI-Native Issue Tracking
+
+Welcome to Beads! This repository uses **Beads** for issue tracking - a modern, AI-native tool designed to live directly in your codebase alongside your code.
+
+## What is Beads?
+
+Beads is issue tracking that lives in your repo, making it perfect for AI coding agents and developers who want their issues close to their code. No web UI required - everything works through the CLI and integrates seamlessly with git.
+
+**Learn more:** [github.com/steveyegge/beads](https://github.com/steveyegge/beads)
+
+## Quick Start
+
+### Essential Commands
+
+```bash
+# Create new issues
+bd create "Add user authentication"
+
+# View all issues
+bd list
+
+# View issue details
+bd show <issue-id>
+
+# Update issue status
+bd update <issue-id> --status in_progress
+bd update <issue-id> --status done
+
+# Sync with git remote
+bd sync
+```
+
+### Working with Issues
+
+Issues in Beads are:
+- **Git-native**: Stored in `.beads/issues.jsonl` and synced like code
+- **AI-friendly**: CLI-first design works perfectly with AI coding agents
+- **Branch-aware**: Issues can follow your branch workflow
+- **Always in sync**: Auto-syncs with your commits
+
+## Why Beads?
+
+✨ **AI-Native Design**
+- Built specifically for AI-assisted development workflows
+- CLI-first interface works seamlessly with AI coding agents
+- No context switching to web UIs
+
+🚀 **Developer Focused**
+- Issues live in your repo, right next to your code
+- Works offline, syncs when you push
+- Fast, lightweight, and stays out of your way
+
+🔧 **Git Integration**
+- Automatic sync with git commits
+- Branch-aware issue tracking
+- Intelligent JSONL merge resolution
+
+## Get Started with Beads
+
+Try Beads in your own projects:
+
+```bash
+# Install Beads
+curl -sSL https://raw.githubusercontent.com/steveyegge/beads/main/scripts/install.sh | bash
+
+# Initialize in your repo
+bd init
+
+# Create your first issue
+bd create "Try out Beads"
+```
+
+## Learn More
+
+- **Documentation**: [github.com/steveyegge/beads/docs](https://github.com/steveyegge/beads/tree/main/docs)
+- **Quick Start Guide**: Run `bd quickstart`
+- **Examples**: [github.com/steveyegge/beads/examples](https://github.com/steveyegge/beads/tree/main/examples)
+
+---
+
+*Beads: Issue tracking that moves at the speed of thought* ⚡

.beads/config.yaml

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+# Beads Configuration File
+# This file configures default behavior for all bd commands in this repository
+# All settings can also be set via environment variables (BD_* prefix)
+# or overridden with command-line flags
+
+# Issue prefix for this repository (used by bd init)
+# If not set, bd init will auto-detect from directory name
+# Example: issue-prefix: "myproject" creates issues like "myproject-1", "myproject-2", etc.
+# issue-prefix: ""
+
+# Use no-db mode: load from JSONL, no SQLite, write back after each command
+# When true, bd will use .beads/issues.jsonl as the source of truth
+# instead of SQLite database
+# no-db: false
+
+# Disable daemon for RPC communication (forces direct database access)
+# no-daemon: false
+
+# Disable auto-flush of database to JSONL after mutations
+# no-auto-flush: false
+
+# Disable auto-import from JSONL when it's newer than database
+# no-auto-import: false
+
+# Enable JSON output by default
+# json: false
+
+# Default actor for audit trails (overridden by BD_ACTOR or --actor)
+# actor: ""
+
+# Path to database (overridden by BEADS_DB or --db)
+# db: ""
+
+# Auto-start daemon if not running (can also use BEADS_AUTO_START_DAEMON)
+# auto-start-daemon: true
+
+# Debounce interval for auto-flush (can also use BEADS_FLUSH_DEBOUNCE)
+# flush-debounce: "5s"
+
+# Git branch for beads commits (bd sync will commit to this branch)
+# IMPORTANT: Set this for team projects so all clones use the same sync branch.
+# This setting persists across clones (unlike database config which is gitignored).
+# Can also use BEADS_SYNC_BRANCH env var for local override.
+# If not set, bd sync will require you to run 'bd config set sync.branch <branch>'.
+# sync-branch: "beads-sync"
+
+# Multi-repo configuration (experimental - bd-307)
+# Allows hydrating from multiple repositories and routing writes to the correct JSONL
+# repos:
+#   primary: "."  # Primary repo (where this database lives)
+#   additional:   # Additional repos to hydrate from (read-only)
+#     - ~/beads-planning  # Personal planning repo
+#     - ~/work-planning   # Work planning repo
+
+# Integration settings (access with 'bd config get/set')
+# These are stored in the database, not in this file:
+# - jira.url
+# - jira.project
+# - linear.url
+# - linear.api-key
+# - github.org
+# - github.repo