Tyrekick MCP Server

Tyrekick

Kick the tyres before you ship it. Get people you trust to review your AI-built prototype — and let your coding agent act on what they say.

Reviewers pin comments directly on the live page — no account, no training. Your coding agent pulls them back over MCP with the exact element, its visible text, the section heading, and any page errors attached, fixes what was flagged, and marks it resolved. The reviewer's pin turns green with a note. You never retype feedback into a prompt again.

▶ Try the live demo  ·  Quickstart  ·  Docs  ·  "The Outer Loop" — why this exists

Real footage: that comment was pinned on the live demo, fixed by an agent, and the pin turned green — no retyping, no tracker, no accounts.

How it works

 reviewer's browser              destination YOU own              your coding agent
┌──────────────────┐   POST    ┌────────────────────┐    MCP    ┌─────────────────┐
│ pin a comment on │ ────────► │ Discord webhook or │ ◄───────► │ "fix the open   │
│ the live page    │           │ your CF Worker     │           │  feedback"      │
└──────────────────┘           └────────────────────┘           └─────────────────┘

The widget is a single ~12 KB (gzipped) script with zero dependencies, rendered in Shadow DOM so it can't fight your page. There is no Tyrekick backend, no accounts, and nothing phones home — feedback POSTs straight from the reviewer's browser to a destination you own. It exists for the moment an agent-built prototype needs more than one pair of eyes: instead of pasting screenshots into group chats and losing the replies, every comment arrives structured, versioned, and pinned to the exact spot.

Pins stay on the page after you leave a comment (dimmed until you interact) — hover one to see its text, click it to open the thread right there, with reply, retry, and discard actions at the pin. Reviewers also get a comment drawer (a right-hand overview listing every pin with its text — click one to jump back to that spot, or hide pins entirely), draft recovery, and full keyboard/touch support (Cmd/Ctrl+Enter sends). With persist: true (the default), localStorage is only used to recover unsent work across reloads — comments that couldn't be delivered come back after a reload with Retry and Discard buttons, re-pinned to the element they were about even if the window size changed.

Agents: installing Tyrekick into a project? Use the make-reviewable skill — one sentence and it hosts the page if needed, picks a destination, deploys the worker, installs the widget, wires MCP, and drafts the ask to send reviewers — or follow AGENTS.md step by step.

Full documentation lives in docs/: quickstart · getting started · configuration · the reviewer experience · destinations · the agent loop · payload reference · troubleshooting & FAQ

60-second quickstart (Discord)

The fastest path is a Discord channel you control — the taster that proves feedback flows somewhere you own. The full product (persistence, statuses, your agent closing the loop over MCP) lives on the worker destination below.

One command (from your project folder):

npx tyrekick init

It asks for your webhook URL, injects the script tag, and sends a test comment. Or by hand:

1. In Discord, open Server Settings → Integrations → Webhooks → New Webhook, pick a channel, and Copy Webhook URL.
2. Paste that URL into the snippet below and drop it before </body> on your prototype:

<script
  src="https://cdn.jsdelivr.net/npm/tyrekick@latest/dist/tyrekick.js"
  data-webhook="https://discord.com/api/webhooks/XXXX/YYYY"
  data-app-version="v0.1"
  data-transport="discord"
  data-project-name="My Prototype"
  data-accent="#4f46e5"
  data-position="bottom-right"
  data-branding="true"
></script>

The IIFE build auto-initialises from its own <script> tag's data-* attributes on DOMContentLoaded. Reviewers get a "Give feedback" button in the corner; each comment lands in your Discord channel as a readable message.

Only data-webhook and data-app-version are required. Everything else is optional and falls back to the defaults in the configuration table.

Self-hosting / owned storage

Discord is the frictionless default, but if you want the data in storage you own, use a JSON transport (transport: "json", the default) pointed at an endpoint that persists the payload.

• Cloudflare template (TypeScript): see destinations/cloudflare for a deployable Worker that receives the v2 payload, validates it, and writes it to storage you control. It's a good place to add spam validation since the code is yours.
• Same-origin Pages Function: if your prototype is hosted on Cloudflare Pages, drop a Pages Function at the same origin (e.g. /api/feedback) and set webhook to that relative/same-origin URL. Same-origin means no CORS setup at all.

Any CORS-enabled endpoint or form backend works too — with transport: "json", success is HTTP 2xx and, if a body is returned, it is not {"ok":false}.

The agent loop (MCP)

The reason Tyrekick exists. With the Cloudflare Worker destination, feedback isn't just collected — your coding agent can pull it, act on it, and resolve it:

1. Deploy the worker and set a token (see destinations/cloudflare):

   wrangler deploy && wrangler secret put TYREKICK_TOKEN
   

2. Give your agent the pipeline (once — it works for every future session):

   claude mcp add tyrekick \
     --env TYREKICK_URL=https://tyrekick-feedback.YOUR.workers.dev \
     --env TYREKICK_TOKEN=your-token \
     -- npx tyrekick-mcp
   

3. Close the loop with one sentence:

   "List the open feedback and fix what people flagged, then resolve it."

The agent gets five tools — list_feedback, get_feedback, triage_feedback, resolve_feedback, feedback_stats — and each item carries the element's visible text (greppable in your source), the nearest heading, the route, the viewport, and any uncaught page errors. A comment like "this button does nothing" arrives as:

element: <button> "Search trips"
under: "Plan your escape" · landmark: main > section#planner
page_errors: 1
> This button does nothing when I click it

That's a better bug report than most humans write. Full details in mcp/README.md.

Programmatic / ESM usage

Install from your registry and initialise explicitly (the ESM build does not auto-init):

npm install tyrekick

import { init, destroy } from "tyrekick";

init({
  webhook: "https://discord.com/api/webhooks/XXXX/YYYY",
  appVersion: "v0.1",
  projectName: "My Prototype",
  transport: "discord",
});

// later, to tear down all DOM, listeners, and in-memory state:
destroy();

The global (IIFE) equivalent is window.Tyrekick.init(config) / window.Tyrekick.destroy(). Calling init() twice without destroy() is a no-op and warns; a missing webhook or appVersion throws.

Configuration

Every field of TyrekickConfig (see src/types.ts):

Payload schema (v2)

With transport: "json", the raw body POSTed to your webhook is exactly this shape (FeedbackPayload):

{
  "schema": 2,
  "id": "b1c2...",
  "created_at": "2026-07-02T10:15:30.000+12:00",
  "project_name": "My Prototype",
  "app_version": "v0.1",
  "route": "/pricing?ref=x#plans",
  "url": "https://example.com/pricing?ref=x#plans",
  "body": "This button is hard to find.",
  "reviewer_name": "Sam",
  "session_id": "9f8e...",
  "anchor": {
    "x_pct": 42.3,
    "y_pct": 71.8,
    "selector": "main > section.pricing > button.cta",
    "viewport": { "w": 1440, "h": 900 },
    "element": {
      "tag": "button",
      "id": "buy-now",
      "testid": "pricing-cta",
      "role": null,
      "text": "Start free trial",
      "label": "Start your free trial",
      "rect": { "x": 612, "y": 484, "w": 216, "h": 44 }
    },
    "context": {
      "heading": "Pricing plans",
      "landmark": "main > section#pricing"
    }
  },
  "env": {
    "user_agent": "Mozilla/5.0 ...",
    "language": "en-US",
    "screen": { "w": 1512, "h": 982 },
    "dpr": 2,
    "dark": false,
    "touch": false
  },
  "page_errors": ["TypeError: prices is undefined"]
}

Field notes:

• schema is always 2. id and session_id are UUIDs (id per comment, session_id once per page load).
• created_at is ISO-8601 with timezone. route is location.pathname + search + hash; url is location.href.
• body is the trimmed comment text; reviewer_name is string | null.
• anchor.x_pct / anchor.y_pct are percentages of the document dimensions at click time, to 1 decimal place. anchor.selector is a best-effort CSS selector (max 5 segments) of the deepest host-page element at the point, or null — never the widget's own nodes.
• anchor.element identifies the clicked element so a coding agent can map feedback back to source: lowercase tag, id / data-testid (testid) / role attributes (or null), visible text (trimmed, whitespace collapsed, ≤80 chars, null if empty), label (aria-label → alt → placeholder → title, ≤80 chars), and the viewport-relative bounding rect in integer px at click time. It is null when no element could be resolved. Privacy: for input/textarea/select, text is always null — form values are never captured.
• anchor.context places the click structurally: heading is the text of the nearest heading (h1–h6, walking ancestors and their preceding siblings, ≤80 chars) and landmark is a coarse path of up to 3 landmark ancestors (main, nav, header, footer, aside, section, article, form), innermost last, e.g. "main > section#pricing". Both are null when nothing is found; capture never throws.
• env adds the physical screen size (CSS px), dpr (devicePixelRatio, 2 decimals), dark (prefers-color-scheme: dark) and touch (pointer: coarse).
• page_errors is the last ≤5 uncaught errors / unhandled promise rejections seen this page load (each ≤200 chars, oldest first), collected via window listeners — the console is never patched. [] when there were none or captureErrors: false.

With transport: "discord", this payload is instead formatted into a readable Discord message ({ content }) and that is POSTed.

Limitations

This is deliberately a zero-backend tool. That comes with tradeoffs:

• Receipts close the loop on the worker path only. With the Cloudflare destination, resolving a comment turns the reviewer's pin green with the resolution note attached; on Discord (write-only) there is no read-back.
• Reviews are per-browser. Two reviewers each see their own pins, not each other's; comments meet at the destination, not on the page.
• No screenshots or session replay. Only the JSON payload above is sent — no images, no DOM capture, no recording. The structured element/context capture is the deliberate alternative.
• Spam. A public webhook can receive junk — that's the tradeoff for having no backend and no gatekeeper. Mitigate it by pointing transport: "json" at the Cloudflare template and adding validation/rate-limiting there, or by sending to a private Discord channel that only your reviewers can reach. See docs/destinations for the hosting-based decision table.

Contributing

npm run build   # build dist/tyrekick.js (IIFE) + dist/tyrekick.esm.js (ESM)
npm test        # unit tests (vitest)
npm run e2e     # end-to-end tests (playwright)

Please keep src/types.ts as the single source of truth — don't rename payload keys or config fields without a schema bump.

Re-rendering the demo GIF at the top of this README: node scripts/record-demo.mjs films the whole loop against a throwaway local worker and re-encodes it. See scripts/README.md — the film is scripted (and tweakable) in scripts/record-demo.mjs.

Built by Frontier Operations

Tyrekick exists as a brand vehicle for Frontier Operations: a genuinely useful, open tool that makes gathering feedback on a prototype frictionless while proving a principle we care about — your reviewers' comments never route through us. There's no Frontier backend in the loop and nothing phones home; feedback goes from the reviewer's browser straight to a destination you own. Useful software, given away, that quietly demonstrates how we think about building.