Cohesivity agent plugin

Cohesivity packages one canonical Agent Skill together with a local project bootstrap MCP server and the protected remote Cohesivity management MCP server. The repository root is a pure Agent Plugins 1.0 package; generated native wrappers live under packages/ so client-specific markers never change how the portable root is detected.

Local bootstrap and remote OAuth are independent

The dependency-free local cohesivity-local stdio MCP server needs Node 18 or newer but no Cohesivity account. Its primary create_tenant tool accepts an absolute project root, fetches the canonical quickstart, and executes it in that directory with --no-plugin. It returns only non-secret tenant metadata. The same server exposes fixed claim, status, and provision operations against the Cohesivity Management API. Its provision tool accepts either one resource or a resource list, so single and bulk provisioning share one tool. Those operations read the project's .cohesivity management credential internally, project allowlisted responses, and never expose either coh_* value. There is no generic shell command or arbitrary HTTP proxy.

Node-less clients do not run this local component. They retain the documented quickstart fallback from the skill:

curl -fsSL https://cohesivity.ai/quickstart.sh | bash

This package does not claim or generate native binary support. With the user's agreement, either bootstrap path can create a free ephemeral tenant that expires after 72 hours unless claimed.

The remote management MCP connection at https://cohesivity.ai/mcp/manage is different: it requires Cohesivity sign-in but it can be authorized before the account owns a tenant. The account-scoped grant can create the first tenant and manage current or future owned tenants; an optional tenant chosen during consent is only a default, and ownership is checked again on every tenant call. The endpoint returns an OAuth challenge to compatible MCP clients. No package contains a bearer token, literal auth header, client secret, or other credential.

Related MCP server: Synlake MCP Server

Supported package surfaces

Every installable plugin root is self-contained: it includes skills/cohesivity/SKILL.md, mcp/project-bootstrap.mjs, the appropriate dual MCP configuration, and the license. packages/codex/ is a marketplace catalog whose self-contained plugin lives at plugins/cohesivity/. The OpenAI and Codex packages intentionally have no .app.json: this repository does not own a registered plugin_asdk_app... ID, and inventing one would not create a valid ChatGPT app connection.

Use the repository root with clients that implement Agent Plugins 1.0, including OpenClaw and Hermes. Use a packages/<client>/ directory as the source when a native client requires its own root marker. For example, from a checkout:

claude plugin marketplace add ./packages/claude
gemini extensions install ./packages/gemini
agy plugin install ./packages/antigravity

OpenAI plugin installation is marketplace-driven. packages/openai/ is the standalone native plugin root, while packages/codex/ is a complete local Codex marketplace that points at its nested copy. Both supply the skill, local Node stdio tools, and the remote MCP server, not a registered app.

OAuth and owner overrides

Agent Plugins 1.0 deliberately defines no portable OAuth field. Its mcp.json declares the protected URL with Streamable HTTP transport and the local server with stdio transport, so OAuth discovery, browser interaction, and token storage belong to the client. Clients may leave the remote server disconnected and continue using the skill and local ephemeral bootstrap flow.

OpenClaw requires an owner/operator override to opt the bundled connection into its OAuth credential store. Operator MCP config wins over the bundle entry with the same name:

openclaw mcp set cohesivity '{"url":"https://cohesivity.ai/mcp/manage","transport":"streamable-http","auth":"oauth"}'
openclaw mcp login cohesivity

Hermes also keeps OAuth out of portable package data. Its portable adapter qualifies the server name using discovered install identity, so first copy the exact server name Hermes reports. Owner config replaces the whole bundle entry, not individual fields; repeat the URL, auth mode, and any other desired native fields in the override. Hermes treats a URL-only transport as Streamable HTTP; its native transport field is only needed to opt into legacy sse:

mcp_servers:
  <qualified-server-name>:
    url: https://cohesivity.ai/mcp/manage
    auth: oauth

Then run:

hermes mcp login <qualified-server-name>

Use that same reported name in both places. Owner config.yaml entries take precedence over portable entries, so an incomplete override can discard the bundle's URL or other settings instead of augmenting it.

Antigravity filename collision

Agent Plugins and Antigravity both require a root file named plugin.json, but the schemas are incompatible. Agent Plugins requires its 1.0 $schema and allows portable metadata; Antigravity's published strict schema allows only name and description. The Antigravity manifest therefore stays isolated at packages/antigravity/plugin.json, and its remote MCP file uses Antigravity's required serverUrl key. Do not copy that manifest over the repository root.

Canonical skill, wrappers, and install artifacts

skills/cohesivity/SKILL.md is pinned byte-for-byte to cohesivity-org/cohesivity-skill@f97e0d2ac8a653b7d54d1bb6e70aee78a8887e60:

• skill metadata version: 84fbece3c00b

• SHA-256: 3b0d9cda6167263cb35a4e3b54ed455113318a1b24cb5e341f26843456b0b589

The root skill is the source for every generated wrapper copy. Rebuild and validate with dependency-free Node commands:

npm run build
npm run check
npm test

npm run build removes stale root client markers, regenerates every wrapper in a fixed order, copies the canonical skill and local MCP bytes unchanged, and rebuilds the checked-in archives using the manifest's existing source stamp. npm run check validates wrappers, archives, hashes, sizes, file inventories, and tree digests without writing and fails on any stale or unexpected generated artifact.

Versioned installer inputs live under artifacts/v3.0.0/. Each client archive uses sorted portable tar entries, fixed modes/owners/timestamps, and a deterministic gzip stream. install-manifest.v1.json records each archive's byte size and SHA-256 plus every contained file's size/SHA-256 and a canonical tree digest. Installers fetch the manifest and archive through immutable raw.githubusercontent.com commit URLs and verify size and SHA-256 before extracting; no GitHub Release is required.

The source commit cannot be the commit that first introduces a manifest naming itself. Release publication therefore uses a two-step stamp:

1. Rebuild wrappers and archives, then commit the source and the deterministic *.tar.gz files. Do not publish the provisional manifest from this step.

2. Run SOURCE_COMMIT=<the-full-archive-commit> npm run artifacts. Verify that only install-manifest.v1.json changed, then commit that stamped manifest.

The first commit is now the immutable raw source for every archive URL in the second commit's manifest. SOURCE_COMMIT must be a full lowercase 40-character Git commit; generation has no timestamp or implicit HEAD fallback, so the stamp is deliberate and reproducible.

Safety

Project credentials live in .cohesivity, which must remain gitignored. Neither coh_management_key nor coh_application_key belongs in browser code, logs, screenshots, chat, plugin manifests, or MCP configuration. Claiming a tenant, provisioning paid resources, upgrading a plan, and provisioning a managed agent remain explicit consent gates. The local MCP parses credentials as data, never sources the file, rejects symlinked credential files, and uses fixed named Management API routes only.

Docs

• Offerings and current API contracts: https://cohesivity.ai/offerings/

• Index: https://cohesivity.ai/llms.txt

• Pricing: https://cohesivity.ai/pricing

License

MIT. See LICENSE.