🧬 SyncytiumMD
One context. Every AI coding tool. Zero copy-paste.
The problem
You use Cursor at work, Claude Code in the terminal, Copilot in pull requests, and three CLI agents on CI. Each one wants its own instruction file. So you maintain four copies of the same rules, they drift, and no agent knows what the others did yesterday.
The idea
Keep the rules once, in .syncytium/, and transpile them into every
tool's native format.
.syncytium/ canonical, human-authored, git-tracked
rules/*.md code style, security, testing, architecture, …
memory/decisions.md ADRs — why the project is the way it is
HANDOFF.md live agent baton: who has it, what's next
│
│ syncytium sync
▼
CLAUDE.md AGENTS.md GEMINI.md AGENT.md CONVENTIONS.md
.cursorrules .clinerules .roomodes .windsurfrules .traerules
.cursor/rules/*.mdc .gemini/antigravity/rules/*.md
.github/copilot-instructions.md + .github/instructions/*.instructions.md
Every generated file carries a banner saying where it came from, and
syncytium diff --check fails your CI if any of them drift. syncytium clean
removes only banner-tagged files — your hand-written rules are never touched.
Quick start
npx syncytium init # scaffold .syncytium/ (stack auto-detected)
npx syncytium sync # generate every bridge file
npx syncytium graph # open the 3D knowledge graph in your browser
Requires Node.js 20+. No global install needed; npx works.
What you get
Commands
Run syncytium --help for the full list.
Context
Rules & decisions
syncytium rules [query] # search the catalog
syncytium rule add --title "..." --body "..." # add a canonical rule
syncytium rule show <id> # inspect one
syncytium rule update <id> --body-file x.md # edit in place
syncytium rule remove <id> # delete + prune generated files
syncytium adr list # architectural decisions
syncytium adr add --title "..." --context "..." \
--decision "..." --consequences "..."
syncytium adr show ADR-006
syncytium adr remove ADR-006
Multi-agent coordination
syncytium lock acquire --agent "Cursor" --goal "Refactor auth"
syncytium lock heartbeat --agent "Cursor" # extend the lease
syncytium lock status
syncytium lock release --agent "Cursor"
syncytium handoff -i # interactive wizard
syncytium handoff --from "Cursor" --to "Claude" \
-s ready_for_review -g "Ship v1" -d "…" -t "…"
syncytium log -n 20 # baton audit trail
Guards
syncytium hook install # block commits on drift
syncytium hook install --auto-sync # or just re-sync on every commit
syncytium ci # .github/workflows/syncytium.yml drift gate
syncytium ci --force # regenerate an existing workflow
Knowledge graph
syncytium graph # 3D WebGL cosmos + vault explorer
syncytium graph --category ide # isolate IDE adapters
syncytium graph --compact # hide file and tag nodes
syncytium graph --no-open --port 4000
The server binds to 127.0.0.1 and rejects non-loopback Host headers
(DNS-rebinding guard). It refuses to serve .env*, *.pem, *.key, .git/**
and other in-root secrets.
MCP
{
"mcpServers": {
"syncytium": {
"command": "npx",
"args": ["--ignore-scripts", "[email protected]"],
"cwd": "${workspaceFolder}",
"env": {
"SYNCYTIUM_TOKEN": "${SYNCYTIUM_TOKEN}"
}
}
}
}
Hardening notes: pin the exact package version instead of @latest, pass
--ignore-scripts when launching through npx, keep only the 3-5 MCP
connectors a workspace actually needs, and pass any short-lived, read-only
credential through the env block rather than command arguments.
Or syncytium mcp if you already have the CLI installed. Tools include
syncytium_get_context, syncytium_handoff, syncytium_create_rule,
syncytium_update_rule, syncytium_remove_rule, syncytium_record_decision,
syncytium_sync, syncytium_diff, syncytium_doctor, syncytium_validate,
syncytium_lock_acquire/release/status, syncytium_get_graph and more.
Every input is zod-validated; every output is summarised rather than dumped.
.syncytiumignore
Excludes generated targets from both sync and diff. Full gitignore syntax,
including **, ?, directory-only patterns and ! negation:
# Don't manage these tools
.cursorrules
.github/instructions/
# Except this one
!.github/instructions/keep.md
Custom adapters
Declare any tool in syncytium.config.json — no code required:
{
"customAdapters": [
{
"id": "zed",
"name": "Zed",
"targetFile": ".rules/zed.md",
"includeHandoff": true,
"includeArchitecture": true
}
],
"enabledAdapters": ["cursor", "claude", "zed"]
}
Library usage
import { SyncytiumEngine } from 'syncytium-md';
const engine = new SyncytiumEngine(process.cwd());
await engine.sync();
const { hasDrift, summary } = await engine.diff();
const graph = await engine.getKnowledgeGraph({ category: 'ide' });
Development
npm install
npm run verify # typecheck -> build -> 114 tests
See CONTRIBUTING.md and
.syncytium/architecture.md.
License
MIT © Miraç Birben
