Synctx

Sync Context: Share your context between agents

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synctx is a Bun + Ink terminal UI for browsing recent local AI coding sessions and reopening them in another agent.

It scans each tool's native session store, shows a unified "recent sessions" list, and lets you:

• resume a session in its original agent
• import the conversation into another supported agent
• copy the session ID for manual resume/debugging

Current Scope

The current implementation is focused on local session interoperability between:

• Claude Code
• Codex
• OpenCode

Install

npm (requires Bun runtime)

bun install -g @synctx/synctx
synctx

Standalone binary (no dependencies)

Download from GitHub Releases:

# Apple Silicon
curl -fsSL -o synctx https://github.com/TooonyChen/synctx/releases/latest/download/synctx-macos-arm64
# Intel Mac
curl -fsSL -o synctx https://github.com/TooonyChen/synctx/releases/latest/download/synctx-macos-x64

chmod +x synctx
sudo mv synctx /usr/local/bin/

Build from source

bun install
bun run build
bun run dist/cli.js

Requirements

• macOS (currently the only supported platform)
• one or more supported agent CLIs installed and available on PATH
  • claude
  • codex
  • opencode

How It Works

1. On the first run, synctx creates ~/.synctx/synctx.db and detects installed agent binaries.
2. It reads sessions directly from each agent's native storage format.
3. The dashboard merges those sessions into a single list sorted by last activity.
4. Selecting a session opens an action menu where you can resume it directly or write it into another agent's native format and launch that agent.

Keyboard flow:

• list view: ↑ / ↓ to navigate, enter to select, q or esc to quit
• action view: ↑ / ↓ to navigate, enter to run, q or esc to go back

Agent Support

Agent	Read existing sessions	Import/write target	Resume command	Notes
Claude Code	Yes	Yes	claude --resume <session-id>	Imports are written as project-scoped JSONL files under ~/.claude/projects/...
Codex	Yes	Yes	codex resume <session-id>	Imports register in both ~/.codex/session_index.jsonl and ~/.codex/state_5.sqlite so they are discoverable and render correctly
OpenCode	Yes	Yes	opencode -s <session-id>	Imports are written into OpenCode's SQLite schema so they can be resumed natively
Aider	No	No	N/A	Binary detection only for now

Storage Sources

The current readers use these native stores:

• Claude Code: ~/.claude/projects/<encoded-project-path>/<session-id>.jsonl
• Codex: ~/.codex/sessions/YYYY/MM/DD/rollout-*.jsonl
• OpenCode: ~/.local/share/opencode/opencode.db (SQLite)

TODO

• copy to clipboard
• choose only parts of the context to share, not all
• MCP server to r/w context (well... do we really neet that?)
• more coding agents supports