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feat: add Update Environment MCP App #10260

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c804073
feat: add mcpapps experiment flag and helper
joehan Apr 3, 2026
6c30145
chore: address PR comments on experiments and util
joehan Apr 3, 2026
7050ac6
feat: add infrastructure for MCP Apps
joehan Apr 3, 2026
a5b2a79
feat: add Update Environment MCP App
joehan Apr 3, 2026
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5 changes: 5 additions & 0 deletions src/experiments.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,11 @@ export const ALL_EXPERIMENTS = experiments({
default: false,
public: true,
},
mcpapps: {
shortDescription: "Enables MCP Apps features",
fullDescription: "Enables MCP Apps features, including returning UI resource URIs.",
public: true,
},
fdcift: {
shortDescription: "Enable instrumentless trial for Data Connect",
default: true,
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299 changes: 299 additions & 0 deletions src/mcp/apps/update_environment/mcp-app.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,299 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Update Firebase Environment</title>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap" rel="stylesheet" />
<style>
:root {
--primary-color: #ffca28; /* Firebase Yellow */
--primary-hover: #ffb300;
--bg-glass: rgba(30, 30, 30, 0.7);
--text-main: #ffffff;
--text-sub: #b0b0b0;
--border-color: rgba(255, 255, 255, 0.1);
--transition-speed: 0.2s;
--accent-blue: #1976d2;
}

body {
font-family: 'Inter', sans-serif;
background-color: #121212;
color: var(--text-main);
margin: 0;
padding: 24px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: flex-start;
min-height: 100vh;
box-sizing: border-box;
}

.container {
width: 100%;
max-width: 500px;
background: var(--bg-glass);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border: 1px solid var(--border-color);
border-radius: 16px;
padding: 32px;
box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
display: flex;
flex-direction: column;
gap: 24px;
}

.header {
display: flex;
flex-direction: column;
gap: 8px;
text-align: center;
}

h1 {
font-size: 24px;
font-weight: 600;
margin: 0;
background: linear-gradient(135deg, #ffca28 0%, #ff8f00 100%);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
}

p.subtitle {
font-size: 14px;
color: var(--text-sub);
margin: 0;
}

.search-box {
position: relative;
display: flex;
flex-direction: column;
gap: 8px;
}

label {
font-size: 12px;
font-weight: 500;
color: var(--text-sub);
text-transform: uppercase;
letter-spacing: 0.5px;
}

input[type="text"] {
background: rgba(255, 255, 255, 0.05);
border: 1px solid var(--border-color);
border-radius: 8px;
padding: 12px 16px;
color: var(--text-main);
font-size: 14px;
transition: border-color var(--transition-speed);
width: 100%;
box-sizing: border-box;
}

input[type="text"]:focus {
outline: none;
border-color: var(--primary-color);
background: rgba(255, 255, 255, 0.08);
}

.dropdown-container {
position: relative;
width: 100%;
}

.dropdown-list {
background: #1e1e1e;
border: 1px solid var(--border-color);
border-radius: 8px;
max-height: 250px;
overflow-y: auto;
display: flex;
flex-direction: column;
width: 100%;
box-sizing: border-box;
margin-top: 4px;
}

.dropdown-item {
padding: 12px 16px;
cursor: pointer;
transition: background-color var(--transition-speed);
display: flex;
flex-direction: column;
gap: 4px;
border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.dropdown-item:last-child {
border-bottom: none;
}

.dropdown-item:hover, .dropdown-item.selected {
background: rgba(255, 255, 255, 0.1);
}

.dropdown-item.selected {
border-left: 3px solid var(--primary-color);
}

.item-name {
font-size: 14px;
font-weight: 500;
}

.item-id {
font-size: 12px;
color: var(--text-sub);
}

.actions {
display: flex;
flex-direction: column;
gap: 12px;
}

button {
background: linear-gradient(135deg, #ffca28 0%, #ff9100 100%);
color: #000000;
border: none;
border-radius: 12px;
padding: 14px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
transition: transform 0.1s ease, box-shadow 0.2s ease;
box-shadow: 0 4px 12px rgba(255, 179, 0, 0.3);
}

button:hover {
transform: translateY(-2px);
box-shadow: 0 6px 16px rgba(255, 179, 0, 0.4);
}

button:active {
transform: translateY(0);
}

button:disabled {
background: #4a4a4a;
color: #888888;
cursor: not-allowed;
transform: none;
box-shadow: none;
}

#status-box {
padding: 12px;
border-radius: 8px;
font-size: 14px;
display: none;
animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
from { opacity: 0; transform: translateY(-10px); }
to { opacity: 1; transform: translateY(0); }
}

.status.success {
display: block;
background: rgba(76, 175, 80, 0.15);
border: 1px solid #4caf50;
color: #4caf50;
}

.status.error {
display: block;
background: rgba(244, 67, 54, 0.15);
border: 1px solid #f44336;
color: #f44336;
}

.status.info {
display: block;
background: rgba(33, 150, 243, 0.15);
border: 1px solid #2196f3;
color: #2196f3;
}

/* Custom Scrollbar */
.dropdown-list::-webkit-scrollbar {
width: 8px;
}
.dropdown-list::-webkit-scrollbar-track {
background: rgba(0, 0, 0, 0.1);
}
.dropdown-list::-webkit-scrollbar-thumb {
background: rgba(255, 255, 255, 0.2);
border-radius: 4px;
}
.dropdown-list::-webkit-scrollbar-thumb:hover {
background: rgba(255, 255, 255, 0.4);
}
.current-env-box {
background: rgba(255, 255, 255, 0.05);
border: 1px solid rgba(255, 255, 255, 0.1);
border-radius: var(--border-radius-md, 8px);
padding: 16px;
margin-bottom: 24px;
text-align: left;
}
.current-env-box h3 {
margin-top: 0;
margin-bottom: 8px;
font-size: var(--font-text-md-size, 14px);
color: var(--color-text-secondary, #a1a1aa);
}
.current-env-box p {
margin: 4px 0;
font-size: var(--font-text-sm-size, 13px);
}
.current-env-box span {
font-weight: bold;
color: var(--color-text, #ffffff);
}
</style>
</head>
<body>
<div class="container">
<div class="header">
<h1>Choose a Firebase Project</h1>
<p class="subtitle">Select an active Firebase project for your workspace.</p>
</div>

<div id="current-env" class="current-env-box">
<h3>Current Context</h3>
<p>Project ID: <span id="env-project-id">-</span></p>
<p>User: <span id="env-user">-</span></p>
</div>

<div class="search-box">
<label for="search-input">Search Projects</label>
<input type="text" id="search-input" placeholder="Type to filter projects..." />
</div>

<div class="dropdown-container">
<label>Available Projects</label>
<div id="project-list" class="dropdown-list">
<!-- Items will be injected here -->
<div class="dropdown-item" style="cursor: default;">
<div class="item-name">Loading projects...</div>
</div>
</div>
</div>

<div class="actions">
<button id="submit-btn" disabled>Set Active Project</button>
<div id="status-box"></div>
</div>
</div>
<script type="module" src="mcp-app.ts"></script>
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@gemini-code-assist gemini-code-assist bot Apr 3, 2026

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high

Browsers cannot execute TypeScript files directly. This script tag should reference the compiled JavaScript file (e.g., mcp-app.js) to ensure the application functions correctly in the host environment.

Suggested change
<script type="module" src="mcp-app.ts"></script>
<script type="module" src="mcp-app.js"></script>

</body>
</html>
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