feat: add @coder/ai-sdk-eve-sandbox (Coder backend for Vercel eve)

New package implementing Vercel eve's `SandboxBackend` contract so eve agents
run their sandbox (bash/read/write/glob/grep) inside a Coder workspace.

- Reuses @coder/ai-sdk-sandbox (createCoderWorkspace + transport + session)
  for workspace get-or-create, wait-for-ready, and $HOME resolution; only
  resolvePath/removePath/setNetworkPolicy are added on top.
- `eve` is a type-only peer dependency, so the repo's pinned ai/@ai-sdk
  version chain is untouched (pnpm added eve to minimumReleaseAgeExclude).
- Coder-specific behavior: prewarm is a no-op (Coder templates are
  server-side, no build-time capture), setNetworkPolicy throws on
  non-allow-all unless opted out, and dispose defaults to "keep" (leave the
  workspace running for fast reattach).
- dispose "stop"/"delete" only act on workspaces this backend provisions per
  session; an explicitly-named (borrowed) workspace is never torn down.
- removePath refuses empty / working-dir / root targets to avoid a stray rm -rf.
- 17 mock-transport tests; typecheck, build, oxlint, oxfmt, publint, and attw
  all pass. Wired into release-please, the PR-title scope check, and root
  publint/attw scripts.

Change-Id: Iabac131f8babda3ee5d22959206326b3acbf8b4d
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Thomas Kosiewski <tk@coder.com>

Author: ThomasK33

.github/workflows/pr-title.yml

@@ -40,6 +40,7 @@ jobs:
             chore
           scopes: |
             sandbox
+            eve-sandbox
             agent
             provider
           requireScope: false

.release-please-manifest.json

@@ -1,5 +1,6 @@
 {
   "packages/sandbox": "0.1.0",
   "packages/agent": "0.1.0",
-  "packages/provider": "0.1.0"
+  "packages/provider": "0.1.0",
+  "packages/eve-sandbox": "0.1.0"
 }

package.json

@@ -2,7 +2,7 @@
   "name": "coder-ai-sdk",
   "version": "0.0.0",
   "private": true,
-  "description": "Monorepo for Coder's Vercel AI SDK packages (@coder/ai-sdk-sandbox, @coder/ai-sdk-agent, @coder/ai-sdk-provider).",
+  "description": "Monorepo for Coder's Vercel AI SDK packages (@coder/ai-sdk-sandbox, @coder/ai-sdk-eve-sandbox, @coder/ai-sdk-agent, @coder/ai-sdk-provider).",
   "homepage": "https://github.com/coder/ai-sdk#readme",
   "bugs": {
     "url": "https://github.com/coder/ai-sdk/issues"
@@ -24,8 +24,8 @@
     "format": "oxfmt .",
     "format:check": "oxfmt --check .",
     "check": "oxfmt --check . && oxlint && pnpm -r typecheck",
-    "publint": "pnpm --filter @coder/ai-sdk-sandbox --filter @coder/ai-sdk-provider exec publint",
-    "attw": "pnpm --filter @coder/ai-sdk-sandbox --filter @coder/ai-sdk-provider attw"
+    "publint": "pnpm --filter @coder/ai-sdk-sandbox --filter @coder/ai-sdk-eve-sandbox --filter @coder/ai-sdk-provider exec publint",
+    "attw": "pnpm --filter @coder/ai-sdk-sandbox --filter @coder/ai-sdk-eve-sandbox --filter @coder/ai-sdk-provider attw"
   },
   "devDependencies": {
     "oxfmt": "^0.55.0",

packages/eve-sandbox/LICENSE

@@ -0,0 +1,202 @@
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packages/eve-sandbox/README.md

@@ -0,0 +1,77 @@
+# @coder/ai-sdk-eve-sandbox
+
+A [Coder](https://coder.com) workspace sandbox **backend** for Vercel's [eve](https://github.com/vercel/eve) agent framework. It lets an eve agent run its sandbox (the `bash`, `read_file`, `write_file`, `glob`, `grep` tools) inside a real, long-lived Coder workspace instead of an ephemeral cloud microVM.
+
+It implements eve's public `SandboxBackend` contract, so you pass it to `defineSandbox` exactly like the built-in `docker()` / `vercel()` backends:
+
+```ts
+// agent/sandbox.ts
+import { defineSandbox } from "eve/sandbox";
+import { createCoderSandboxBackend } from "@coder/ai-sdk-eve-sandbox";
+
+export default defineSandbox({
+  // One Coder workspace per eve session, provisioned from a template:
+  backend: createCoderSandboxBackend({
+    create: { template: "docker", preset: "Large" },
+  }),
+});
+```
+
+Or attach to a single, pre-existing workspace:
+
+```ts
+defineSandbox({
+  backend: createCoderSandboxBackend({ workspace: "my-dev-workspace" }),
+});
+```
+
+> **Status:** experimental, and tracks a fast-moving target. eve is in public beta (`eve@0.11.5` at time of writing) and its sandbox interfaces may change before GA. Pin versions and expect churn.
+
+## Install
+
+```bash
+pnpm add @coder/ai-sdk-eve-sandbox eve
+```
+
+`eve` is a peer dependency (your app provides it). The package reaches Coder through the [`coder` CLI](https://coder.com/docs/install) over SSH by default, so an authenticated `coder login` (or an explicit `url`/`token`) must be available wherever the agent runs.
+
+> Because this package builds on `@coder/ai-sdk-sandbox`, your package manager may report `@ai-sdk/harness` and `@ai-sdk/provider-utils` as unmet peers. They are **type-only** there and are not needed at runtime; install them only if you typecheck against this package's internals.
+
+## How it maps onto Coder
+
+eve's sandbox abstraction and `@coder/ai-sdk-sandbox` both build their I/O surface on the Vercel AI SDK's `Experimental_SandboxSession`, so the file/exec layer maps over directly. This backend reuses `@coder/ai-sdk-sandbox` for workspace orchestration (get-or-create, wait-for-ready, `$HOME` resolution, preset validation) and adapts the result to eve's `SandboxSession`.
+
+| eve `SandboxBackend`                       | Coder mapping                                                                                                                                                      |
+| ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `create({ sessionKey, existingMetadata })` | Get-or-create a workspace (per-session name derived from `sessionKey`, or your fixed `workspace`); `existingMetadata` ⇒ reattach. Waits for the agent to be ready. |
+| `SandboxSession.run` / `spawn`             | `coder ssh` exec / streamed process                                                                                                                                |
+| `SandboxSession.read*/write*File`          | base64 over `coder ssh`                                                                                                                                            |
+| `SandboxSession.removePath`                | `rm` over `coder ssh`                                                                                                                                              |
+| `SandboxSession.resolvePath`               | anchors relative paths at the workspace working directory (see caveats)                                                                                            |
+| `handle.captureState()`                    | `{ backendName: "coder", metadata: { workspace }, sessionKey }`                                                                                                    |
+| `handle.dispose()`                         | per `dispose` policy — keep / stop / delete (default **keep**)                                                                                                     |
+
+## Settings
+
+`createCoderSandboxBackend(settings)`:
+
+- `workspace?` — attach to an existing `[owner/]workspace[.agent]` (fixed string or a resolver from the session key). With `create`, it is get-or-created.
+- `create?` — provision from a Coder template (`template`, `preset`, `parameters`, …). Without an explicit `workspace`, eve gets **one workspace per session**.
+- `transport?` — defaults to a `CoderCliTransport` over an ambient `coder login`. Use `new CoderCliTransport({ url, token })` (re-exported from this package) for explicit auth.
+- `defaultWorkingDirectory?` — defaults to the workspace `$HOME`.
+- `readyTimeoutMs?` — agent-readiness timeout (default `300000`).
+- `dispose?` — `"keep"` (default), `"stop"`, or `"delete"`. `"stop"`/`"delete"` apply only to per-session workspaces this backend provisions (create mode without an explicit `workspace`); an explicitly named workspace is treated as borrowed and never stopped/deleted. **At least one of `workspace` or `create` is required.**
+- `allowUnsafeNetworkPolicy?` — see below.
+
+## Caveats specific to Coder
+
+These follow from eve's model meeting Coder's, not from missing work:
+
+- **`prewarm` is a near no-op.** Coder templates are provisioned server-side (Terraform), so there is no build-time template snapshot to capture, and eve `seedFiles` are **not** baked in. Bake setup into your Coder template, or write files from a sandbox `onSession` hook.
+- **`setNetworkPolicy` is not enforceable.** Egress is governed by your Coder template/deployment, not this backend. Anything other than `"allow-all"` **throws** by default (rather than implying containment that isn't there). Pass `allowUnsafeNetworkPolicy: true` to treat it as a no-op — but note that eve features relying on firewall **credential brokering** (e.g. the GitHub channel injecting auth headers via `setNetworkPolicy`) then silently do _not_ broker, so those flows are unsupported here.
+- **Per-session workspaces have provisioning latency.** A fresh workspace is a Terraform build (minutes); set `readyTimeoutMs` accordingly. Reattach to an already-running workspace is fast — which is why `dispose` defaults to **keep**.
+- **Relative paths anchor at the workspace working directory** (`$HOME` by default), not eve's `/workspace` root. eve features that write to _absolute_ `/workspace` paths (e.g. skill injection, attachment staging) require that path to exist and be writable in your Coder workspace image.
+
+## License
+
+Apache-2.0