Check whether the break is at the project-level (someone missing from the Lovable project invite / role) or at runtime (app denies access because secrets/role mapping are missing). Fix project-level membership in the Lovable Cloud UI (re-invite or change role). For runtime problems, use Lovable chat edits to (A) add a simple debug endpoint that shows the decoded token and roles, (B) update the app’s role-check middleware to read roles from the token and fall back to env flags, and (C) ensure your secrets are present via the Lovable Secrets UI. Paste the prompts below into your Lovable project chat to make the code changes and to create documentation that explains the UI steps you must perform.

Create a debug endpoint that shows the decoded token and roles

Paste this into Lovable chat to add a safe debug API at src/pages/api/debug/whoami.ts so you can see what the runtime receives (use Preview to call it with your Authorization header).

• Action: create file src/pages/api/debug/whoami.ts with the code below

// create file: src/pages/api/debug/whoami.ts
// This endpoint decodes the Authorization Bearer token and returns claims for debugging.
// Do NOT ship this to production; keep it disabled or remove after debugging.

import type { NextApiRequest, NextApiResponse } from 'next'
import jwt from 'jsonwebtoken'

export default function handler(req: NextApiRequest, res: NextApiResponse) {
  const auth = req.headers.authorization || ''
  const token = auth.replace(/^Bearer\s+/i, '')
  if (!token) {
    return res.status(400).json({ error: 'No Authorization Bearer token provided' })
  }

  try {
    // Use process.env.AUTH_PUBLIC_KEY (set this in Lovable Secrets UI)
    const key = process.env.AUTH_PUBLIC_KEY || ''
    if (!key) throw new Error('Missing AUTH_PUBLIC_KEY in env')

    // Verify without throwing if key is placeholder; try decode if verify fails
    let decoded: any
    try {
      decoded = jwt.verify(token, key, { algorithms: ['RS256', 'HS256'] })
    } catch (e) {
      // fallback to decode so you can inspect an unsigned token
      decoded = jwt.decode(token, { complete: true }) || null
    }

    return res.status(200).json({ tokenReceived: !!token, decoded })
  } catch (err: any) {
    return res.status(500).json({ error: err.message })
  }
}

Update or add a centralized role-check middleware

Paste this into Lovable chat to create/update src/lib/requireRole.ts. This ensures server routes use the token roles and a clear fallback. Edit your serverless or API route imports to use this helper where you check permissions.

• Action: create or replace src/lib/requireRole.ts with the code below

// create/replace file: src/lib/requireRole.ts
// Middleware/helper to enforce roles from JWT and fallback to env for edge cases.

import jwt from 'jsonwebtoken'

export function getClaimsFromAuthHeader(authHeader: string | undefined) {
  const token = (authHeader || '').replace(/^Bearer\s+/i, '')
  if (!token) return null
  const key = process.env.AUTH_PUBLIC_KEY || ''
  try {
    return jwt.verify(token, key, { algorithms: ['RS256', 'HS256'] })
  } catch (e) {
    // fallback to decode so development tokens can still be inspected
    return jwt.decode(token, { complete: false })
  }
}

export function requireRole(claims: any, allowedRoles: string[] = []) {
  // roles expected as claims.roles or claims.role (array or string)
  const roles = Array.isArray(claims?.roles) ? claims.roles : (claims?.role ? [claims.role] : [])
  for (const r of roles) {
    if (allowedRoles.includes(r)) return true
  }

  // explicit fallback via env var for emergency access (set via Lovable Secrets)
  const emergency = (process.env.EMERGENCY_ACCESS || '').split(',').map(s => s.trim()).filter(Boolean)
  if (emergency.length && emergency.includes('ALLOW_ALL')) return true

  return false
}

Document Secrets & Project-invite fixes (what you must do in the Lovable UI or GitHub)

Paste this into Lovable chat to create .lovable/ACCESS\_FIX.md so non-technical teammates know the UI steps to fix project membership and secrets.

• Action: create file .lovable/ACCESS\_FIX.md with the content below

// create file: .lovable/ACCESS_FIX.md
// Explain exactly what to do in the Lovable Cloud UI and GitHub.

Step A - Lovable Project Membership:
- Open the project in Lovable Cloud (project Settings > Members).
- The project Owner or Admin must invite the missing person by email and assign an Editor or Developer role.
- If someone can't accept, ask them to check their email spam and that they sign into the same Lovable account email.

Step B - Secrets required by the app:
- Open Project > Secrets in the Lovable UI.
- Add or update these keys:
  - AUTH_PUBLIC_KEY  -> paste your auth provider's public key (required for token verification)
  - EMERGENCY_ACCESS -> optional comma-separated flags, e.g., ALLOW_ALL
- After adding secrets, use Lovable Preview to re-run requests (no terminal needed).

Step C - GitHub repo access (outside Lovable):
- If you sync to GitHub and a teammate needs repo push rights, go to the repo Settings > Manage access on GitHub and add them.

```

Troubleshooting notes

• If a teammate cannot open the project in Lovable at all: an Admin must re-invite via Lovable Cloud UI (this is not editable from inside the project chat).
• If runtime still denies access after these changes: use Preview to call /api/debug/whoami with the same Authorization header your client sends, inspect claims, then adjust requireRole allowedRoles where your API enforces permissions.
• If you must change GitHub repo permissions: do that in GitHub (outside Lovable).

Use least-privilege roles enforced server-side, gate UI links client-side, store sensitive keys in Lovable Cloud Secrets, validate with Preview before Publish, and export to GitHub only for changes that need terminal/CI. Implement role checks as small, testable helpers and apply them to every API route and server-rendered page; hide controls in the UI but never rely on client-only checks.

Practical Lovable Prompts (paste each into Lovable chat)

• Create a small server-side role guard — prompt Lovable to create a helper file that reads a JWT from cookies/Authorization and enforces roles. Ask Lovable to create src/lib/requireRole.ts with this content:

// create src/lib/requireRole.ts
// This helper expects a JWT in Authorization Bearer or cookie "token".
// It throws a 401/403 if missing or role mismatch.

import jwt from 'jsonwebtoken'

// // Use process.env.JWT_SIGNING_KEY (set in Lovable Secrets)
const SECRET = process.env.JWT_SIGNING_KEY || ''

export function getUserFromToken(token: string | undefined) {
  if (!token) return null
  try {
    // // Verify and return payload
    return jwt.verify(token.replace(/^Bearer\s+/,'') , SECRET) as any
  } catch (e) {
    return null
  }
}

export function requireRole(req: any, res: any, roles: string[] = []) {
  // // Read token from header or cookie
  const auth = (req.headers && req.headers.authorization) || (req.cookies && req.cookies.token)
  const user = getUserFromToken(auth)
  if (!user) {
    res.statusCode = 401
    res.end('Unauthorized')
    throw new Error('Unauthorized')
  }
  if (roles.length && !roles.includes(user.role)) {
    res.statusCode = 403
    res.end('Forbidden')
    throw new Error('Forbidden')
  }
  return user
}

• Protect API endpoints — prompt Lovable to update specific server routes to use the guard. For example update src/pages/api/admin/users.ts (or create it) to require an admin:

// update/create src/pages/api/admin/users.ts
import { requireRole } from '../../lib/requireRole'

// // Server-side handler
export default function handler(req, res) {
  // // require admin role
  const user = requireRole(req, res, ['admin'])
  // // If we reach here, user is authorized
  res.json({ ok: true, you: user })
}

• Hide admin UI links but enforce on server — prompt Lovable to edit src/components/Nav.tsx to conditionally render admin links based on the current user object (do NOT rely on this for security):

// update src/components/Nav.tsx in the navigation rendering block
// // Assume there's a currentUser prop or hook; only show link if currentUser?.role === 'admin'
{currentUser?.role === 'admin' && (
  <a href="/admin">Admin</a>
)}

• Document Secrets and set them in Lovable Cloud — prompt Lovable to create SETUP.md at project root explaining exactly which secrets to set in Lovable Secrets UI and how to test with Preview. Ask Lovable to add this file:

// create SETUP.md
# Secrets to add in Lovable Cloud Secrets UI

// Add a secret named JWT_SIGNING_KEY with a strong random value.
// If using Supabase, add SUPABASE_SERVICE_KEY and SUPABASE_URL as secrets.
// After adding secrets, use Lovable Preview to validate protected routes.

• Preview + Publish checklist — prompt Lovable to add a project note file LOVABLE\_CHECKLIST.md with steps: set Secrets in UI, Preview, confirm admin route returns 401 when unauthenticated, then Publish. This keeps the flow inside Lovable.

Extra guidance

• Least privilege: give people access only to the project(s) they need in Lovable and avoid embedding service admin keys in client code.
• Server enforcement: always enforce roles on API/server-rendered pages. Client-only hiding is for UX only.
• Secrets: add keys via Lovable Cloud Secrets UI (not in code). Use the SETUP.md created above to remind team members.
• When terminal/DB migrations are required: export/sync to GitHub from Lovable and run migrations from your terminal/CI — mark those steps in SETUP.md as "outside Lovable (terminal required)".
• Validate with Preview: use Lovable Preview to test both unauthorized and authorized flows before Publish.