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REACHABLE Agent Plugin Installer

This repository is the public framework for REACHABLE agent marketplace plugins. It contains one catalog repo with one installable package per agent: Claude Code, Cursor, and Codex.

It contains marketplace metadata, host-shaped plugin manifests, bootstrap skills, setup commands, MCP descriptions, and publication docs.

It does not contain REACHABLE scanner, verifier, remediation, daemon, or MCP runtime code.

Official site: https://sthenosec.com

REACHABLE product page and downloads are served from the Sthenos Security front end. This repository is the public marketplace/source catalog that points users back to that product UX.

Installers should download through sthenosec.com. reach-core is private, and reach-dist is a public archive but not the customer-facing distribution endpoint because direct GitHub downloads can hit throttling and UX limits.

The trust anchor is the signed release metadata exposed through the public route. The release pipeline records build/signing provenance; GitHub repos are provenance/archive references, not the primary install URLs.

Install Flow

Install the REACHABLE plugin from the agent marketplace
  -> open the target workspace
  -> run reachable: setup
  -> run reachable: doctor

reachable: setup installs or verifies the signed REACHABLE runtime for the current workspace, then configures the local daemon-backed MCP server named reachable where the agent supports MCP.

What This Repo Publishes

  • Plugin metadata for Claude Code, Cursor, and Codex.
  • One installable package per agent, shaped for that agent marketplace.
  • Bootstrap skills that expose reachable: setup and reachable: doctor.
  • Descriptive MCP metadata for the server installed after setup.
  • Marketplace submission docs and proof checklists.

What This Repo Does Not Publish

  • No scanner logic.
  • No verifier logic.
  • No remediation logic.
  • No local daemon implementation.
  • No bundled MCP server.
  • No fake MCP server placeholder.

Runtime code is delivered by the signed REACHABLE installer and release manifest.

Release Binding And Provenance

This repo links to the public REACHABLE front-end download path. It does not copy the plugin downloader or runtime artifacts.

Manifest:  https://sthenosec.com/download/manifest.json
Installer: https://sthenosec.com/download/plugins/install.sh

The setup flow must verify:

  • versioned release manifest;
  • artifact SHA-256 checksums;
  • cosign signature/bundle;
  • GitHub Actions OIDC issuer identity;
  • Sthenos Security release workflow identity;
  • expected repository provenance for generated artifacts;
  • expected release archive provenance when present.

If signature, checksum, issuer, identity, or provenance verification fails, setup must fail closed.

Direct Bootstrap Fallback

Marketplace install is the preferred UX. During beta or recovery, use the public installer for the target agent:

curl -fsSL https://sthenosec.com/download/plugins/install.sh | bash -s -- --agent codex
curl -fsSL https://sthenosec.com/download/plugins/install.sh | bash -s -- --agent cursor
curl -fsSL https://sthenosec.com/download/plugins/install.sh | bash -s -- --agent claude-code

After the installer package is present, open the workspace in the agent and run:

reachable: setup
reachable: doctor

Repository Layout

marketplace.json
.claude-plugin/marketplace.json
.cursor-plugin/marketplace.json
.agents/plugins/marketplace.json
schemas/marketplace.schema.json
docs/
  release-binding.md
plugins/
  claude-code/
  cursor/
  codex/

Each plugin folder is intentionally thin. The plugin provides setup and doctor instructions; the REACHABLE runtime owns security analysis and proof.

The repo is shared, but the installable artifacts are per-agent. Do not force a single universal plugin package across Claude Code, Cursor, and Codex.

Copyright And License

Copyright 2026 Sthenos Security.

This public framework repo is licensed under Apache-2.0. REACHABLE product names, service marks, hosted services, and runtime release channels remain subject to Sthenos Security terms.

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REACHABLE agent plugin installer marketplace framework for Claude Code, Cursor, and Codex

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