constellation

A multi-agent coordination plugin that provides messaging, a WebSocket server, a dashboard, session helpers, and shared room artifacts. It lets several coding agents coordinate work and keep shared decisions and board state.

In plain words
What is it for?
Use it to run coordinated agent rooms, exchange messages, manage session lifecycles, keep decision records and summaries, and track work through a shared board.
Why use it?
It reduces confusion when multiple agents are working together by tracking messages, acknowledgements, decisions, summaries, and task stages.

Plugin for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code
/plugin marketplace add SoliEstre/EstreGenesis
agentmods
npx agentmods add plugins/soliestre/estregenesis/constellation
Clone the repo
git clone --depth 1 https://github.com/SoliEstre/EstreGenesis

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

constellation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/constellation/.claude-plugin/plugin.json · 21 lines

How it starts

The opening of the file, as written. The whole thing — 21 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "constellation",
  "version": "0.3.42",
  "description": "Live multi-agent orchestration: WebSocket server + A2A messaging + dashboard + Stop hook helper + MCP server (full Phase 2 impl: WS proxy + 5 tools incl. a2a_wait_ack 3-tier + session-lifecycle + §13.13.2 dedup + chunked transfer reassembly). v0.3.29 / Constellation v2.4.57 — room artifacts + board state schema: the reference server holds three pinned artifacts per room (header · append-only decision ledger rd-N with supersedes · running summary with covers_until) behind the symmetric fetch contract (RequestRoomArtifacts → RoomArtifacts) and the new write path RoomArtifactsUpdate (participants/board only, server-stamped editor/versions, delta broadcast under a single ack-by-reference artifacts version); dashboard room tabs gain a collapsible 📌 pinned block (esc-only, auto-fetch on entry, TDZ-guarded) and the scribe charter the room-digest duty; §13.31 (new) canonicalizes the board state contract — current[].stages {label, status: pending|active|done} + sub/blockedBy + a five-point usage discipline — with matching hooks in /roundnext (start-with-stages), /boardsweep (§13.31 as the consumer contract), and /roundtable (D5 fetch/write); roundtable smoke 18→22 checks. v0.3.28 = boardsweep renderer-contract clause (adopter-measured gap: a stages list written as {name,state} against a {label,status} renderer survived two sweeps rendering all-PENDING — schema normalization now checks field keys/value domains against the consumer contract, since render fallbacks silently swallow this class; deterministic state lint preferred where present). v0.3.27 / Constellation v2.4.53 — roundtable topic rooms (§13.30): multi-party rooms (3+ participants, agents + humans) with a two-layer split — the server enforces the deterministic floor (fan-out over existing 1:1 relay, autoHop chain cap with parking, per-agent rate + consecutive caps, stall detection, human soft-yield priority, advisory floor state, notice-class su

Read the full file on GitHub · 21 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 21 lines scan A 654b10cbb817

Subscribe to this mod's changes

constellation is a plugin published in the GitHub repository SoliEstre/EstreGenesis (8 stars, last pushed 8d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.