feat(signal-ui): migrate agent-readiness files to Vercel, add graphify to gitignore

Moves llms.txt, robots.txt, auth.md, .well-known/api-catalog, agent-skills,
webmcp.js from VPS /var/www/signal-demo to signal-ui/public/ so they are
served from the Vercel deployment at signal.sttilsolutions.com.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

signal-ui/public/.well-known/agent-skills/index.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://agentskills.dev/schema/v0.2.0/index.json",
+  "version": "0.2.0",
+  "updated": "2026-06-06",
+  "skills": [
+    {
+      "name": "request_pilot",
+      "description": "Submit a pilot interest form to join Signal's limited early access program for DMEPOS suppliers.",
+      "url": "https://signal.sttilsolutions.com/.well-known/agent-skills/request-pilot/SKILL.md",
+      "sha256": "sha256:7625f9f124599b4a9678203b7c02568391836ad8c511dccd01f7abc4b33383d3"
+    }
+  ]
+}

signal-ui/public/.well-known/agent-skills/request-pilot/SKILL.md

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+# Request Signal Pilot Access
+
+Submit an interest form to join Signal's limited pilot program for DMEPOS suppliers.
+
+## Input required
+- name: full name of the contact
+- email: work email address
+- company: organization name
+- role: your role (e.g. "Billing Manager", "Owner", "RCM Director")
+
+## What happens next
+STTIL Solutions reviews the submission and responds within 2 business days. Pilot is limited to 3 DMEPOS suppliers or billing companies actively billing CGM.
+
+## How to submit
+POST to https://n8n.sttilsolutions.com/webhook/signal-cgm-lead with JSON body:
+
+```json
+{
+  "name": "<name>",
+  "email": "<email>",
+  "company": "<company>",
+  "role": "<role>"
+}
+```
+
+## Eligibility
+DMEPOS suppliers, billing companies, or RCM firms with active CGM patients.

signal-ui/public/.well-known/api-catalog

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+{
+  "$schema": "https://www.iana.org/assignments/linkset/linkset-1.0.schema.json",
+  "linkset": [
+    {
+      "anchor": "https://signal.sttilsolutions.com",
+      "describedby": [
+        { "href": "https://signal.sttilsolutions.com/llms.txt", "type": "text/markdown" }
+      ],
+      "agent-skills": [
+        { "href": "https://signal.sttilsolutions.com/.well-known/agent-skills/index.json", "type": "application/json" }
+      ],
+      "author": [
+        { "href": "https://signal.sttilsolutions.com/auth.md", "type": "text/markdown" }
+      ]
+    }
+  ]
+}

signal-ui/public/auth.md

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+# Agent registration & contact — Signal
+
+## Authentication posture
+This site is **public**. All content and discovery endpoints are anonymous and read-only. The pilot request form submits to a secure webhook — no API key required to submit.
+
+## How an agent should identify itself
+Send a descriptive `User-Agent` header. Respect `robots.txt`. One pilot request per organization please.
+
+## Contact
+- Signal pilot: https://signal.sttilsolutions.com/#contact
+- STTIL Solutions: https://sttilsolutions.com
+
+## Capabilities
+See the [Agent Skills index](/.well-known/agent-skills/index.json).
+
+## Not applicable
+- No OAuth/OIDC (no protected API)
+- No MCP server card (no MCP endpoint on this marketing site)
+- No commerce protocols

signal-ui/public/llms.txt

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+# Signal — Powered by STTIL Solutions
+
+> Documentation readiness tracker for DMEPOS suppliers — stops CGM claim denials before they happen.
+
+## What it does
+- [Signal overview](https://signal.sttilsolutions.com/): per-patient stoplight report from CSV upload, flagging SWO gaps, expired qualifying visits, PA requirements, and PECOS issues before submission.
+
+## Request pilot access
+- [Pilot request form](https://signal.sttilsolutions.com/#contact): limited to 3 organizations. DMEPOS suppliers, billing companies, RCM firms.
+
+## For agents
+- [Agent skills index](https://signal.sttilsolutions.com/.well-known/agent-skills/index.json): what an agent can do here.
+- [API catalog](https://signal.sttilsolutions.com/.well-known/api-catalog): machine-readable resource index.
+- [Auth / contact](https://signal.sttilsolutions.com/auth.md): how to identify yourself and reach us.
+
+## Parent company
+- [STTIL Solutions](https://sttilsolutions.com/llms.txt): full portfolio context.

signal-ui/public/robots.txt

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+User-agent: *
+Allow: /
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: GPTBot
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: OAI-SearchBot
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: ChatGPT-User
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: ClaudeBot
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: Claude-User
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: PerplexityBot
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: Google-Extended
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+User-agent: Amazonbot
+Content-Signal: search=yes, ai-input=yes, ai-train=no
+
+Sitemap: https://signal.sttilsolutions.com/sitemap.xml

signal-ui/public/webmcp.js

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+// WebMCP — progressive enhancement. Silent no-op in all browsers until navigator.modelContext ships.
+(function () {
+  if (!navigator.modelContext) return;
+
+  navigator.modelContext.registerTools([
+    {
+      name: "request_pilot",
+      description: "Submit a Signal pilot interest form for a DMEPOS supplier or billing company.",
+      parameters: {
+        type: "object",
+        properties: {
+          name:    { type: "string", description: "Full name of the contact" },
+          email:   { type: "string", description: "Work email address" },
+          company: { type: "string", description: "Organization name" },
+          role:    { type: "string", description: "Role, e.g. Billing Manager, Owner, RCM Director" }
+        },
+        required: ["name", "email", "company", "role"]
+      },
+      execute: async function ({ name, email, company, role }) {
+        const res = await fetch("https://n8n.sttilsolutions.com/webhook/signal-cgm-lead", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ name, email, company, role })
+        });
+        if (!res.ok) throw new Error("Submission failed");
+        return { success: true, message: "Pilot request submitted. STTIL Solutions will respond within 2 business days." };
+      }
+    }
+  ]);
+})();