Keep your AI coding agents in sync.
A sync layer for MCP server configs across 11 AI coding agents — Claude Code, Cursor, Codex, Gemini CLI, Kimi CLI, OpenCode, OpenClaw, Hermes, Windsurf, Antigravity, GitHub Copilot CLI. Install MCPs with whatever tool you prefer — mcpm, claude mcp add, etc. — then run syncthis run to mirror them everywhere.
For skills, syncthis delegates to vercel-labs/skills, which supports 55 agents.
| ✅ syncs MCP server configs across 11 coding agents | ❌ installs MCP servers (use mcpm, claude mcp add, etc.) |
✅ refreshes skills via npx skills update -y |
❌ installs skills from registries (use npx skills add) |
| ✅ supports one-way mirror between any two agents | ❌ removes servers (use your installer's removal mode) |
bun install -g @hungv47/syncthis
# or
npm install -g @hungv47/syncthis# 1. install MCP servers / skills with your preferred tool
mcpm install github
npx skills add vercel-labs/agent-skills --skill frontend-design
# 2. mirror everything to every agent
syncthis runThat's it. No config file, no source-of-truth to maintain.
syncthis # interactive picker (or HELP if non-TTY)
syncthis run [--dry-run] [--no-skills] # MCP + skills (alias for sync)
syncthis sync [--dry-run] [--no-skills] # same as run
syncthis mcp [--dry-run] # MCP only
syncthis skills # skills only — `npx skills update -y`
syncthis <from> <to> [--yes] [--dry-run] # one-way mirror MCP from one agent to another
syncthis doctor # coverage + conflict report
syncthis help
--dry-run prints what would change without writing.
--no-skills skips the skills update phase.
--yes skips the confirmation prompt for directional sync.
| Agent | Config file |
|---|---|
claude-code |
~/.claude.json (merges top-level + every projects.*.mcpServers scope) |
cursor |
~/.cursor/mcp.json |
codex |
~/.codex/config.toml |
gemini-cli |
~/.gemini/settings.json |
kimi-cli |
~/.kimi/mcp.json |
antigravity |
~/.gemini/antigravity/mcp_config.json |
github-copilot |
~/.copilot/mcp-config.json (override via $COPILOT_HOME) |
windsurf |
~/.codeium/windsurf/mcp_config.json |
opencode |
~/.config/opencode/opencode.json |
openclaw |
~/.openclaw/openclaw.json (override via $OPENCLAW_CONFIG_PATH) |
hermes-agent |
~/.hermes/config.yaml |
- Reads MCP servers from each agent's config. For Claude, merges top-level + every per-project scope.
- Computes the union. Any server present in any agent gets propagated to every agent.
- Detects conflicts. If the same server name has different configs across agents, syncthis leaves each agent's own version untouched and reports the conflict — you resolve manually.
- Refreshes skills by running
npx skills update -y. Skills sync is delegated tovercel-labs/skills, which handles 55 agents.
Every target file is backed up to <file>.syncthis.bak on the first write so you can recover if something goes wrong.
syncthis claude-code codex --dry-runMirrors MCP servers from claude-code to codex (one-way, destructive). Shows a diff and asks for confirmation before writing — pass --yes to skip the prompt. The conflict policy of the union sync does NOT apply here: this is an explicit overwrite of to's config with from's.
$ syncthis run
read 3 server name(s) across 11 agent(s); 2 synced, 1 conflict(s)
✓ claude-code ~/.claude.json
✓ cursor ~/.cursor/mcp.json
...
1 conflict(s) — left each agent's own copy untouched:
~ github
in claude-code
in cursor
resolve by deleting the version you don't want, then re-run sync.
syncthis intentionally has no remove command. Removal goes through your installer (mcpm remove, claude mcp remove, etc.) or by editing the agent file directly. If a server still exists in any agent after removal, the next syncthis run will re-propagate it to the others.
To remove a server everywhere at once, delete it from every agent — or use your installer's "remove from all" mode.
Skills are handled entirely by npx skills (Vercel Labs). syncthis runs npx skills update -y as part of run/sync to refresh registry-installed skills. For installing skills, use npx skills add <repo> directly. See skills.sh for the registry.
MIT