diff --git a/.omp-plugin/marketplace.json b/.omp-plugin/marketplace.json
deleted file mode 100644
index 63417b1..0000000
--- a/.omp-plugin/marketplace.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "name": "rblaine95",
-  "owner": {
-    "name": "rblaine95"
-  },
-  "metadata": {
-    "description": "OMP plugins maintained by rblaine95"
-  },
-  "plugins": [
-    {
-      "name": "rules-guard",
-      "description": "Enforce the Claude permissions.deny policy across all omp tools (read/write/edit/find/search/bash/eval/browser).",
-      "version": "0.0.0",
-      "source": {
-        "source": "github",
-        "repo": "rblaine95/omp-plugins",
-        "path": "extensions/rules-guard"
-      },
-      "repository": "https://github.com/rblaine95/omp-plugins",
-      "license": "MIT"
-    },
-    {
-      "name": "usage-status",
-      "description": "Show remaining subscription usage and reset countdowns for every provider, in a color-coded row above the omp editor.",
-      "version": "0.0.0",
-      "source": {
-        "source": "github",
-        "repo": "rblaine95/omp-plugins",
-        "path": "extensions/usage-status"
-      },
-      "repository": "https://github.com/rblaine95/omp-plugins",
-      "license": "MIT"
-    }
-  ]
-}
diff --git a/AGENTS.md b/AGENTS.md
index 44e35e3..ca4a2cd 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -4,15 +4,16 @@
 extensions, published as one installable plugin. Install/update/uninstall live in
 [`README.md`](./README.md); this file is for _changing_ the code.
 
-The repo root is the plugin manifest: root `package.json` `omp.extensions` lists every
-entry point, so one install pulls the whole suite. Each extension is a Bun workspace
-member under `extensions/*`. TypeScript run directly by [Bun](https://bun.com/docs/llms.txt)
+The repo root is the plugin manifest: root `package.json` `omp.features` declares every
+extension as a selectable feature (all `default: true`), so a bare install pulls the whole
+suite and a bracketed spec loads a subset. Each extension is a Bun workspace member
+under `extensions/*`. TypeScript run directly by [Bun](https://bun.com/docs/llms.txt)
 (1.x, Node 24) — **no build step**.
 
 ## Layout
 
 ```text
-package.json           root manifest; omp.extensions array = the install contract
+package.json           root manifest; omp.features map = the install contract (one feature per extension)
 extensions/<name>/     one workspace member per extension
   index.ts             entry: default export receives ExtensionAPI, wires pi.on(...) hooks
   index.test.ts        colocated bun:test suite
@@ -65,7 +66,7 @@ what release-please parses on `master`.
 
 1. `mkdir extensions/<name>` with a `package.json` (`name`, `"version": "0.0.0"`,
    `omp.extensions: ["./index.ts"]`).
-2. Add its entry to the **root** `omp.extensions` array — a member missing from it won't load.
+2. Add a feature entry to the **root** `omp.features` map: `"<name>": { "description": "…", "default": true, "extensions": ["./extensions/<name>/index.ts"] }`. `default: true` keeps it in the bare whole-suite install; the key is the `[<name>]` selector. A member missing from it won't load.
 3. `bun install`.
 
 ## Included extensions
diff --git a/README.md b/README.md
index ddd0595..b5df5bf 100644
--- a/README.md
+++ b/README.md
@@ -2,18 +2,32 @@
 
 Personal [oh-my-pi](https://omp.sh) extensions, published as one installable plugin.
 
-The repo root is itself the plugin manifest: root `package.json` `omp.extensions` lists
-every extension entry point, so a single `omp plugin install` pulls the whole suite. Each
-extension lives in its own Bun workspace member under `extensions/*` for isolated
+The repo root is itself the plugin manifest: root `package.json` `omp.features` declares
+every extension as a selectable feature (all `default: true`), so a bare `omp plugin
+install` enables the whole suite while a bracketed spec enables just the features you name.
+Each extension lives in its own Bun workspace member under `extensions/*` for isolated
 development and testing.
 
 ## Install
 
+All specs install the same single `omp-plugins` package (both extension directories come
+with it); the bracket only selects which features **load**:
+
 ```sh
-omp plugin install github:rblaine95/omp-plugins
+omp plugin install github:rblaine95/omp-plugins                      # enable whole suite
+omp plugin install 'github:rblaine95/omp-plugins[rules-guard]'       # enable just rules-guard
+omp plugin install 'github:rblaine95/omp-plugins[usage-status]'      # enable just usage-status
+omp plugin install 'github:rblaine95/omp-plugins[*]'                 # all features, explicit
 ```
 
-Extensions load on the next omp start. `omp plugin list` shows `omp-plugins` as enabled.
+Quote any bracketed spec — shells like zsh treat `[...]` as a glob. Extensions load on the
+next omp start. `omp plugin list` shows the one `omp-plugins` package as enabled regardless
+of selection. Change which features load later, without reinstalling, via
+`omp plugin features @rblaine95/omp-plugins`.
+
+> Marketplace installs (`name@marketplace`) cannot activate these — omp loads
+> `omp.extensions`/`omp.features` only for git/npm/`link` installs, never from a marketplace
+> cache. Use the `omp plugin install github:…` commands above.
 
 ## Update
 
@@ -71,5 +85,5 @@ install pulls in zero runtime dependencies.
 ## Adding an extension
 
 1. `mkdir extensions/<name>` with its own `package.json` (`name`, `"version": "0.0.0"`, `omp.extensions: ["./index.ts"]`) — members are not versioned independently.
-2. Add the entry to the root `package.json` `omp.extensions` array, which is what a git install reads.
+2. Add a feature entry to the root `package.json` `omp.features` map — `{ "description": "…", "default": true, "extensions": ["./extensions/<name>/index.ts"] }`. This is what a git install reads; `default: true` keeps it in the bare whole-suite install, and its key becomes the `[<name>]` selector.
 3. `bun install` to register the new workspace member.
diff --git a/package.json b/package.json
index 1f3233f..1ac8a65 100644
--- a/package.json
+++ b/package.json
@@ -22,9 +22,21 @@
   },
   "packageManager": "bun@1.3.14",
   "omp": {
-    "extensions": [
-      "./extensions/rules-guard/index.ts",
-      "./extensions/usage-status/index.ts"
-    ]
+    "features": {
+      "rules-guard": {
+        "description": "Enforce the Claude permissions allow/deny policy across all omp tools (read/write/edit/find/search/bash/eval/browser).",
+        "default": true,
+        "extensions": [
+          "./extensions/rules-guard/index.ts"
+        ]
+      },
+      "usage-status": {
+        "description": "Show remaining subscription usage and reset countdowns for every provider, in a color-coded row above the omp editor.",
+        "default": true,
+        "extensions": [
+          "./extensions/usage-status/index.ts"
+        ]
+      }
+    }
   }
 }