computer: Make just-bash an optional peer and stop installing acorn

.changeset/optional-just-bash-acorn.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/computer": minor
+---
+
+`just-bash` is now an optional peer dependency and should be installed manually when using `@cloudflare/computer/backends/worker-shell`.

docs/12_worker_backend.md

@@ -18,6 +18,13 @@ the host workspace over Workers RPC, so there is no second store
 and no sync round trip; the host Durable Object's SQLite is the
 only authoritative state.
 
+just-bash is an optional peer dependency of `@cloudflare/computer`.
+Install it alongside the package when you use this backend:
+
+```sh
+npm install @cloudflare/computer just-bash
+```
+
 Import via the sub-path so the bundled just-bash payload tree-shakes
 out of consumers that don't use it:
 

examples/artifacts/package.json

@@ -11,7 +11,8 @@
     "build:types": "wrangler types"
   },
   "dependencies": {
-    "@cloudflare/computer": "*"
+    "@cloudflare/computer": "*",
+    "just-bash": "^3.0.1"
   },
   "devDependencies": {
     "typescript": "^6.0.3",

examples/egress/package.json

@@ -12,7 +12,8 @@
     "build:types": "wrangler types"
   },
   "dependencies": {
-    "@cloudflare/computer": "*"
+    "@cloudflare/computer": "*",
+    "just-bash": "^3.0.1"
   },
   "devDependencies": {
     "typescript": "^6.0.3",

examples/mcp/package.json

@@ -18,6 +18,7 @@
     "@modelcontextprotocol/sdk": "1.31.0",
     "@platformatic/vfs": "^0.4.0",
     "ai": "^7.0.0",
+    "just-bash": "^3.0.1",
     "zod": "^4.4.3"
   },
   "devDependencies": {

examples/pi-ai/package.json

@@ -14,6 +14,7 @@
   "dependencies": {
     "@cloudflare/computer": "*",
     "@earendil-works/pi-ai": "^0.99.2",
+    "just-bash": "^3.0.1",
     "zod": "^4.4.3"
   },
   "devDependencies": {

examples/tanstack-ai/package.json

@@ -15,6 +15,7 @@
     "@cloudflare/computer": "*",
     "@tanstack/ai": "^0.63.0",
     "@tanstack/ai-cloudflare": "^0.2.1",
+    "just-bash": "^3.0.1",
     "zod": "^4.4.3"
   },
   "devDependencies": {

examples/think-compare-runtimes/package.json

@@ -29,6 +29,7 @@
     "@shikijs/themes": "^4.2.0",
     "agents": "^0.20.0",
     "ai": "^7.0.0",
+    "just-bash": "^3.0.1",
     "partyserver": "^0.5.6",
     "partysocket": "^1.1.19",
     "react": "^19.2.7",

examples/think/package.json

@@ -26,6 +26,7 @@
     "agents": "^0.20.0",
     "ai": "^7.0.0",
     "isomorphic-git": "^1.38.3",
+    "just-bash": "^3.0.1",
     "workers-ai-provider": "^4.0.0",
     "zod": "^4.4.3"
   },

examples/vite-bundle/package.json

@@ -13,7 +13,8 @@
     "build:types": "wrangler types"
   },
   "dependencies": {
-    "@cloudflare/computer": "*"
+    "@cloudflare/computer": "*",
+    "just-bash": "^3.0.1"
   },
   "devDependencies": {
     "@cloudflare/vite-plugin": "^1.63.0",

examples/worker-shell/package.json

@@ -13,7 +13,8 @@
     "build:types": "wrangler types"
   },
   "dependencies": {
-    "@cloudflare/computer": "*"
+    "@cloudflare/computer": "*",
+    "just-bash": "^3.0.1"
   },
   "devDependencies": {
     "typescript": "^6.0.3",

packages/computer/README.md

@@ -84,7 +84,8 @@ binding, and the worker-shell backend needs the `experimental` flag. Each backen
 own binding requirements — see [Choosing a backend](#choosing-a-backend).
 
 Optional peer dependencies, installed only if you use the matching
-feature: `zod` for every tools entry point, `ai` for
+feature: `just-bash` for `@cloudflare/computer/backends/worker-shell`,
+`zod` for every tools entry point, `ai` for
 `@cloudflare/computer/tools` and `@cloudflare/computer/tools/ai-sdk`, and
 `@platformatic/vfs` for the Node-side VFS provider. The pi and TanStack
 AI entry points need nothing beyond `zod`; your agent brings its own
@@ -314,7 +315,7 @@ Alongside `exec`, the runtime exposes `getExec`, `killExec`, and
 | --- | --- | --- | --- | --- |
 | **Container** | Experimental | `@cloudflare/computer/backends/container` | Shell commands in full Linux userland (real binaries, `npm`, `node`, network) | A Cloudflare Container running `computerd`, scheduled by the durable object (`scheduling_policy: "durable_object"`) |
 | **Container (legacy)** | Deprecated | `@cloudflare/computer/backends/container-legacy` | The same | A Cloudflare Container the platform schedules and sizes from the `containers` block |
-| **Worker shell** | Experimental | `@cloudflare/computer/backends/worker-shell` | Shell commands via [just-bash](https://github.com/vercel-labs/just-bash) in a Dynamic Worker | A Worker Loader binding; `experimental` flag |
+| **Worker shell** | Experimental | `@cloudflare/computer/backends/worker-shell` | Shell commands via [just-bash](https://github.com/vercel-labs/just-bash) in a Dynamic Worker | A Worker Loader binding; `experimental` flag; the `just-bash` package |
 | **Worker JavaScript** | Stable | `@cloudflare/computer/backends/worker-javascript` | ECMAScript modules in a fresh Dynamic Worker | A Worker Loader binding |
 
 - **Container** cold-starts more slowly but gives you a real Linux

packages/computer/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@cloudflare/computer",
   "version": "0.5.1",
-  "description": "Cloudflare Computer — a SQLite-backed virtual filesystem with sync to a container-side daemon (computerd).",
+  "description": "Cloudflare Computer \u2014 a SQLite-backed virtual filesystem with sync to a container-side daemon (computerd).",
   "license": "MIT",
   "repository": {
     "directory": "packages/computer",
@@ -164,14 +164,13 @@
     "prepublishOnly": "npm run build && npm test"
   },
   "dependencies": {
-    "acorn": "^8.17.0",
-    "capnweb": "^0.10.0",
-    "just-bash": "^3.0.1"
+    "capnweb": "^0.10.0"
   },
   "peerDependencies": {
     "@cloudflare/workers-types": "^4.20260616.1 || ^5.20260921.1",
     "@platformatic/vfs": "*",
     "ai": "^6.0.196 || ^7.0.0",
+    "just-bash": "^3.0.1",
     "vite": "^6.0.0 || ^7.0.0 || ^8.0.0",
     "zod": "^4.4.3"
   },
@@ -185,6 +184,9 @@
     "ai": {
       "optional": true
     },
+    "just-bash": {
+      "optional": true
+    },
     "vite": {
       "optional": true
     },
@@ -201,10 +203,12 @@
     "@earendil-works/pi-ai": "^0.99.2",
     "@platformatic/vfs": "^0.4.0",
     "@tanstack/ai": "^0.63.0",
+    "acorn": "^8.17.0",
     "ai": "^7.0.0",
     "diff": "^9.0.0",
     "esbuild": "^0.28.1",
     "isomorphic-git": "^1.38.3",
+    "just-bash": "^3.0.1",
     "memfs": "^4.57.6",
     "rolldown": "^1.0.2",
     "rolldown-plugin-dts": "^0.25.2",