diff --git a/AGENT-INSTALL.md b/AGENT-INSTALL.md
index 0134a452..f895ac6e 100644
--- a/AGENT-INSTALL.md
+++ b/AGENT-INSTALL.md
@@ -8,8 +8,8 @@ Every command at a glance — what it does, whether it reads your source, what i
 
 | Command | What it does | Reads your source? | Writes to your project | Sends over the network |
 |---|---|---|---|---|
-| `scan` | Provision (or reuse) the site and POST the dependency list for vulnerability matching. Also runs automatically via `setup` and the install/build hooks. | No — lockfile only (bun: enumerates `node_modules/`) | `.patchstackrc.json`; the widget `<script>` tag in the root HTML shell — only after a successful post | Package names + versions |
-| `setup` | One bounded command: `scan` → manage the widget → install + verify `protect` → wire the install/build scans. Never runs the project build. | No | Config, widget tag, guard files, `package.json` scripts | Package names + versions (via `scan`) |
+| `scan` | Provision (or reuse) the site and POST the dependency list for vulnerability matching. Also runs automatically via `setup` and the install/build hooks. | No — lockfile only (bun: enumerates `node_modules/`) | `.patchstackrc.json`; the widget `<script>` tag in the root HTML shell — only after a successful post; the production marker in a code root shell — before the post, since it needs no site UUID | Package names + versions |
+| `setup` | One bounded command: `scan` → manage the widget → install + verify `protect` → wire the install/build scans. Never runs the project build. | No | Config, widget tag, production marker, guard files, `package.json` scripts | Package names + versions (via `scan`) |
 | `map` | Local, read-only attack-surface analysis (entry points → inputs → sinks → evidence-backed flows). Never run by another command. | **Yes** — via the app's own TypeScript | Nothing (only the file named by `--out`) | Nothing — **unless `--upload`**: structure only (routes, parameter names, the package behind each sink, file:line). Never source code or env values |
 | `protect` | Install the always-on runtime guard; auto-wire known stacks, or scaffold a generic guard + print a wiring plan. `--check` verifies the guard is wired (exit 1 if not); `--demo` seeds a broad sample rule set. Runs automatically **only** via `setup` — never by `scan`, `guide`, `status`, or `mark-build`. | No — writes guard files, does not analyze your code | Guard/framework files (e.g. `middleware.ts`, `src/patchstack/`) | Nothing |
 | `demo node-serialize` | Production-backed walkthrough: confirm the vulnerable package is present, scan, wait for live rule `18843`, install + verify the guard, print test requests. Does not install the package or start/restart the app. | No | Same files as `scan` + `protect` | `scan` payload; polls the public Pulse rules endpoint (never the printed test requests) |
@@ -28,7 +28,9 @@ Only `map` reads your source, and only `map --upload` sends anything derived fro
 - Package: [`@patchstack/connect`](https://www.npmjs.com/package/@patchstack/connect), MIT-licensed, source at https://github.com/patchstack/connect. `npm view @patchstack/connect` shows the live registry metadata.
 - **What is sent to Patchstack is the dependency list only** — read from the lockfile (`package-lock.json`, `pnpm-lock.yaml`, `yarn.lock`) or, on bun projects (`bun.lock`/`bun.lockb`), by enumerating the installed packages under `node_modules/` — package names + versions, for vulnerability matching. No source code, no env var values, no file paths, no git history is ever transmitted. (`mark-build` additionally stamps built HTML with a coarse stack descriptor that may include hosting-related env variable *names* — e.g. `VERCEL`, `CF_PAGES` — never their values.)
 - **One command reads source files:** `map` (see below) parses your server source to report your app's attack surface. It runs only when you invoke it and prints to stdout. It transmits nothing unless you explicitly pass `--upload`, which sends that description of your app's structure to your own site's Patchstack endpoint — never source code, and never without that flag. No other command reads source (`protect` writes guard files but does not analyze your code).
-- **`scan` makes one source edit, and only after a successful post:** it adds (or updates) the disclosure widget's `<script>` tag in the project's root HTML shell — the first of `index.html`, `public/index.html`, or `src/app.html` that exists. It touches no other file, never edits on `--dry-run` or after a failed post, leaves any pre-existing manual widget tag untouched, and is disabled entirely by `"widget": false` in `.patchstackrc.json`. `mark-build` writes to build output only (`dist/`, `build/`, `out/`, `.output/public`), never to source. `guide`, `status`, and `init` write nothing except `init`'s own `.patchstackrc.json`.
+- **`scan` makes up to two source edits, both in the project's root shell:** the disclosure widget's `<script>` tag, and the production marker. Neither runs on `--dry-run`, both are idempotent, both leave a pre-existing manual install untouched, and `"widget": false` in `.patchstackrc.json` disables both.
+  - The **widget tag** goes in the root HTML shell — the first of `index.html`, `public/index.html`, or `src/app.html` that exists — and only after a successful post, because it carries the site UUID.
+  - The **production marker** goes in a root shell that is JSX rather than HTML (e.g. `src/routes/__root.tsx`, `app/layout.tsx`), inside a `{/* #region patchstack */}` block placed above the widget tag. It is written *before* the post: it carries no site UUID and needs no network, and build scripts commonly chain `patchstack-connect scan || true`, where waiting on the server would mean an offline build silently ships without the flag. The marker is guarded by the framework's own production expression (`import.meta.env.PROD`, or `process.env.NODE_ENV === 'production'`), so it is inert in dev and preview builds. Without it a server-rendered site has no built HTML for `mark-build` to stamp, and the widget treats the published site as build mode. `mark-build` writes to build output only (`dist/`, `build/`, `out/`, `.output/public`), never to source. `guide`, `status`, and `init` write nothing except `init`'s own `.patchstackrc.json`.
 - **`setup` runs `scan`, then `protect`, then edits `package.json` scripts:** provisioning happens first so the runtime guard can bake the real site UUID. It verifies the resulting framework seam, preserves existing commands, adds `scan` after dependency installs and before builds, adds `mark-build` after builds, and uses a direct build chain for Bun. It never runs the project build. If the widget or runtime guard needs a framework-specific manual merge, it prints the exact remaining step instead of overwriting user code.
 - The package also exposes **`protect`** directly (runtime exploit guard; its templates live under `dist/protect/`). `setup` invokes it automatically; `scan`, `guide`, `status`, and `mark-build` do not. It writes only local files and auto-wires known stacks — **TanStack Start + Supabase** (patches the Supabase client + `src/start.ts`), **Next.js** (scaffolds `middleware.ts`), **SvelteKit** (`src/hooks.server.ts`), **Astro** (`src/middleware.ts`), **Nuxt** (`server/middleware/`), **NestJS** (`app.use(patchstackMiddleware)` in the bootstrap), **Fastify** (`app.register(patchstackFastify)`), and **Express** (`app.use(patchstackMiddleware)`). On **any other stack** it scaffolds a framework-agnostic guard under `src/patchstack/` and prints a wiring plan — then you finish the install by importing that guard into your server entry (`protectFetch(handler)` for a Web-Fetch server, or `app.use(patchstackMiddleware)` for Node/Express) and running `patchstack-connect protect --check` to confirm it is wired (exit 1 until it is). Passing `--demo` seeds a broad sample rule set (for demonstrations, not production).
 - **`demo node-serialize` is an explicit production-backed walkthrough.** It requires `node-serialize@0.0.4` to already be present in the lockfile; it does not install the vulnerable dependency. It runs the same production `scan`, polls the configured site's public Pulse rules endpoint until rule `18843` is served, runs `protect`, verifies the generated guard, and prints exploit/benign test requests. It writes the same manifest/widget and guard files as those underlying commands. It does not start/restart the app and does not send the printed requests.
@@ -67,7 +69,7 @@ Only `map` reads your source, and only `map --upload` sends anything derived fro
 
 ## Manual setup
 
-1. **First scan** — provisions a Patchstack site automatically, writes the UUID to `.patchstackrc.json`, and installs the disclosure widget's `<script>` tag into the root HTML shell (`index.html`, `public/index.html`, or `src/app.html`) when one exists. No signup, dashboard step, or UUID is needed up front:
+1. **First scan** — provisions a Patchstack site automatically, writes the UUID to `.patchstackrc.json`, and installs the disclosure widget's `<script>` tag into the root HTML shell (`index.html`, `public/index.html`, or `src/app.html`) when one exists — or, when the root shell is JSX, the production marker instead. No signup, dashboard step, or UUID is needed up front:
 
    ```
    npx @patchstack/connect scan
@@ -91,7 +93,7 @@ Only `map` reads your source, and only `map --upload` sends anything derived fro
 
    **Bun-managed projects:** `bun run` does not execute npm-style `pre`/`post` scripts, so wire the build script directly instead: `"build": "patchstack-connect scan && <existing build command> && patchstack-connect mark-build"`.
 
-3. **Verify the disclosure widget** — a floating "Report a vulnerability" button. `scan` installs it automatically into a plain HTML shell, and `mark-build` carries it into built HTML. Only when `scan` reported that it found no editable shell (frameworks whose root layout is code, e.g. Next.js/Nuxt/Astro) add the one-liner it printed to the root layout yourself, just before `</body>` (never a JS entry point), reading `siteUuid` from `.patchstackrc.json`:
+3. **Verify the disclosure widget** — a floating "Report a vulnerability" button. `scan` installs it automatically into a plain HTML shell, and `mark-build` carries it into built HTML. Only when `scan` reported that it found no editable shell (frameworks whose root layout is code, e.g. Next.js/Nuxt/Astro) add the one-liner it printed to the root layout yourself, just before `</body>` (never a JS entry point), reading `siteUuid` from `.patchstackrc.json`. On those same roots the widget also needs the production marker above the tag — `scan` adds it automatically to a JSX root, and prints it to paste when it finds no anchor. A server-rendered site without the marker serves the build-mode claim flow to its visitors:
 
    ```html
    <script src="https://cdn.patchstack.com/patchstack-widget.js" data-site-uuid="<SITE_UUID>" defer></script>
diff --git a/README.md b/README.md
index 4c86cd39..dec21c64 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ That's it. `setup`:
 2. POSTs the package list to Patchstack with **no** UUID.
 3. Patchstack provisions a fresh site and returns its UUID.
 4. The connector writes the UUID to `.patchstackrc.json` so the next `scan` targets the same site.
-5. The connector installs the disclosure widget's `<script>` tag into your root HTML shell (see *The disclosure widget* below) so the "Report a vulnerability" button shows up on the next preview reload.
+5. The connector installs the disclosure widget's `<script>` tag into your root HTML shell (see *The disclosure widget* below) so the "Report a vulnerability" button shows up on the next preview reload. On a server-rendered root it also adds the production marker, which is what tells the widget to switch from build mode to visitor report intake on the published site.
 6. Installs the runtime guard after provisioning, bakes the site UUID into it, and verifies the framework seam. Known server stacks are auto-wired; unmatched or conflicting layouts get a generic scaffold and exact manual checks.
 7. Adds `postinstall: patchstack-connect scan`, preserving any existing command, so dependencies added during a sandbox session and build-less production installs are reported immediately.
 8. Wires `scan` before builds and `mark-build` after builds, preserving existing commands and using direct build chaining for Bun.
@@ -51,8 +51,10 @@ patchstack-connect scan   [options]                Scan the lockfile and POST to
                                                    If no UUID is configured the server provisions
                                                    one and the connector persists it. After a
                                                    successful post, adds/updates the disclosure
-                                                   widget tag in the root HTML shell (opt out
-                                                   with "widget": false in .patchstackrc.json)
+                                                   widget tag in the root HTML shell. Also adds the
+                                                   production marker to a JSX root shell, before the
+                                                   post (opt out of both with "widget": false in
+                                                   .patchstackrc.json)
 patchstack-connect setup  [options]                Run scan, manage the widget, and idempotently
                                                    install + verify runtime protection and wire
                                                    dependency/build scans. Never runs the build
@@ -180,6 +182,8 @@ The widget is a floating "Report a vulnerability" button — a disclosure channe
   <script src="https://cdn.patchstack.com/patchstack-widget.js" data-site-uuid="<SITE_UUID>" defer data-patchstack-connect-widget="true"></script>
   ```
 
+- **`scan`** also adds the production marker when the root shell is JSX rather than HTML (`src/routes/__root.tsx`, `app/layout.tsx`, …), above the widget tag and guarded by the framework's production expression. A server-rendered app emits no built HTML for `mark-build` to stamp, so without it the widget reads the published site as build mode and shows the claim flow to visitors instead of the report form.
+
   Re-runs update the tag in place (the `data-patchstack-connect-widget` attribute marks it as connector-managed); a pre-existing manual widget tag is left untouched. `--dry-run` and failed posts never edit anything. Projects whose root layout is code rather than HTML (Next.js, Nuxt, Astro, …) get the exact snippet and target file printed instead — `guide` shows framework-specific placement.
 
 - **`mark-build`** ensures the same tag in built HTML output, covering builds whose source shell the connector couldn't edit, and stamps `window.__PATCHSTACK_PROD__` so the widget hides the claim/login UI on the published site (owners reach it by appending `#patchstack` to the live URL).