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* The settings panel: an MCP App (ui:// resource) for choosing where to work, previewing
* what the connection can do and recovering from connection problems.
*
* It talks only to its host over the MCP Apps bridge and only to this server's tools; it
* makes no network request of its own (empty CSP) and shows GitLab strings as text only.
* Saving goes through the same tools as every other client, so the panel never has an
* effect a direct tool call could not have.
*/
import { packageVersion } from '../../config';
export const SETTINGS_PANEL_URI = 'ui://gitlab-mcp/settings-panel-v1.html';
/** MCP Apps protocol version the panel speaks. */
export const MCP_APPS_PROTOCOL_VERSION = '2026-01-26';
/** Resource metadata: no network origins at all, and a host border around the panel. */
export const SETTINGS_PANEL_RESOURCE_META = {
ui: { csp: { connectDomains: [], resourceDomains: [], frameDomains: [] }, prefersBorder: true },
};
const STYLE = `
:root {
color-scheme: light dark;
--bg: var(--color-background-primary, #ffffff);
--bg-muted: var(--color-background-secondary, #f4f5f7);
--text: var(--color-text-primary, #1f2328);
--text-muted: var(--color-text-secondary, #59636e);
--border: var(--color-border-primary, #d1d9e0);
--ring: var(--color-ring-primary, #2f6feb);
--danger: var(--color-text-danger, #c62828);
--success: var(--color-text-success, #1a7f37);
--warning: var(--color-text-warning, #9a6700);
--radius: var(--border-radius-md, 8px);
--font: var(--font-sans, system-ui, -apple-system, "Segoe UI", sans-serif);
}
:root[data-theme="dark"] {
--bg: var(--color-background-primary, #0d1117);
--bg-muted: var(--color-background-secondary, #161b22);
--text: var(--color-text-primary, #e6edf3);
--text-muted: var(--color-text-secondary, #9198a1);
--border: var(--color-border-primary, #3d444d);
--danger: var(--color-text-danger, #f47067);
--success: var(--color-text-success, #57ab5a);
--warning: var(--color-text-warning, #c69026);
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) {
--bg: var(--color-background-primary, #0d1117);
--bg-muted: var(--color-background-secondary, #161b22);
--text: var(--color-text-primary, #e6edf3);
--text-muted: var(--color-text-secondary, #9198a1);
--border: var(--color-border-primary, #3d444d);
--danger: var(--color-text-danger, #f47067);
--success: var(--color-text-success, #57ab5a);
--warning: var(--color-text-warning, #c69026);
}
}
* { box-sizing: border-box; }
body { margin: 0; padding: 16px; background: var(--bg); color: var(--text);
font: 14px/1.45 var(--font); }
h1 { font-size: 16px; margin: 0 0 4px; }
h2 { font-size: 14px; margin: 0 0 8px; }
section { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px;
margin-top: 12px; }
.muted { color: var(--text-muted); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
label { font-weight: 600; display: block; margin-bottom: 4px; }
input[type="search"] { width: 100%; padding: 8px; border: 1px solid var(--border);
border-radius: var(--radius); background: var(--bg); color: var(--text); font: inherit; }
button { padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius);
background: var(--bg-muted); color: var(--text); font: inherit; cursor: pointer; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { border-color: var(--ring); }
:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
ul.results { list-style: none; margin: 8px 0 0; padding: 0; max-height: 240px;
overflow-y: auto; }
ul.results li { padding: 6px 8px; border-radius: var(--radius); cursor: pointer; }
ul.results li[aria-selected="true"] { background: var(--bg-muted); outline: 1px solid var(--ring); }
.kind { font-size: 12px; color: var(--text-muted); margin-left: 6px; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 0; }
dt { color: var(--text-muted); }
dd { margin: 0; overflow-wrap: anywhere; }
.status-ok { color: var(--success); }
.status-error { color: var(--danger); }
.status-warning { color: var(--warning); }
#notice:empty { display: none; }
#notice { margin-top: 12px; padding: 8px; border-radius: var(--radius); background: var(--bg-muted); }
ul.plain { margin: 4px 0 0; padding-left: 18px; }
@media (max-width: 420px) { body { padding: 8px; } dl { grid-template-columns: 1fr; } }
`;
// Raw: the escapes below belong to the browser script, not to this module.
const SCRIPT = String.raw`
(function () {
'use strict';
var PROTOCOL = '${MCP_APPS_PROTOCOL_VERSION}';
var VERSION = '${packageVersion}';
var REQUEST_TIMEOUT_MS = 30000;
var nextId = 1;
var pending = {};
// busy: a save is in flight; searching: a search is. A search never ends a save.
var state = { settings: null, context: null, selected: null, query: '', results: [], busy: false, searching: false };
function el(id) { return document.getElementById(id); }
function text(node, value) { node.textContent = value == null ? '' : String(value); }
function clear(node) { while (node.firstChild) node.removeChild(node.firstChild); }
function announce(message, kind) {
var notice = el('notice');
notice.className = kind ? 'status-' + kind : '';
text(notice, message);
}
// ---- MCP Apps bridge (JSON-RPC over postMessage with the host) ----
function post(message) { window.parent.postMessage(message, '*'); }
function request(method, params) {
var id = nextId++;
post({ jsonrpc: '2.0', id: id, method: method, params: params });
return new Promise(function (resolve, reject) {
var timer = setTimeout(function () {
delete pending[id];
reject(new Error('The app host did not answer'));
}, REQUEST_TIMEOUT_MS);
pending[id] = { resolve: resolve, reject: reject, timer: timer };
});
}
function notify(method, params) { post({ jsonrpc: '2.0', method: method, params: params || {} }); }
window.addEventListener('message', function (event) {
if (event.source !== window.parent) return;
var message = event.data;
if (!message || message.jsonrpc !== '2.0') return;
if (message.method === undefined && message.id !== undefined && pending[message.id]) {
var entry = pending[message.id];
delete pending[message.id];
clearTimeout(entry.timer);
if (message.error) entry.reject(new Error(message.error.message || 'Request failed'));
else entry.resolve(message.result);
return;
}
if (message.method === 'ui/notifications/host-context-changed') applyHostContext(message.params);
if (message.method === 'ui/resource-teardown' && message.id !== undefined) {
post({ jsonrpc: '2.0', id: message.id, result: {} });
}
});
function applyHostContext(context) {
if (!context) return;
if (context.theme === 'light' || context.theme === 'dark') {
document.documentElement.setAttribute('data-theme', context.theme);
}
var variables = context.styles && context.styles.variables;
if (variables) {
Object.keys(variables).forEach(function (name) {
if (name.indexOf('--') === 0 && typeof variables[name] === 'string') {
document.documentElement.style.setProperty(name, variables[name]);
}
});
}
}
function toolText(result) {
var parts = (result && result.content) || [];
return parts.filter(function (p) { return p.type === 'text'; })
.map(function (p) { return p.text; }).join('\n');
}
function callTool(name, args) {
return request('tools/call', { name: name, arguments: args || {} }).then(function (result) {
if (result && result.isError) {
var error = new Error(toolText(result) || 'The tool failed');
error.toolError = true;
throw error;
}
return (result && result.structuredContent) || {};
});
}
// ---- Problems a user can act on ----
function explain(error) {
var message = (error && error.message) || String(error);
if (/invalid_token|re-authenticate|401|sign in again|no longer accepts/i.test(message)) {
return 'Your GitLab sign-in expired or was revoked. Reconnect GitLab from the app’s connection settings, then open this panel again.';
}
if (/CONNECTION_FAILED|unreachable|ECONNREFUSED|timed out|temporarily unavailable/i.test(message)) {
return 'GitLab is not reachable right now. Your saved settings still apply; try again in a moment.';
}
if (/did not answer/.test(message)) {
return 'The app host stopped answering. Close and reopen this panel.';
}
return message;
}
// ---- Rendering (GitLab strings only ever go through textContent) ----
function describeScope(scope) {
if (!scope || !scope.path) return 'Everywhere you have access';
if (scope.type === 'group') {
return 'Group ' + scope.path + (scope.includeSubgroups ? ' and its subgroups' : ' (not its subgroups)');
}
return 'Project ' + scope.path;
}
function renderContext() {
var context = state.context;
var settings = state.settings;
if (!context || !settings) return;
text(el('chat-scope'), describeScope(context.scope));
var values = settings.values || {};
text(el('default-scope'), values.scope
? values.scope + (values.scopeIncludeSubgroups ? '' : ' (not its subgroups)')
: 'Everywhere you have access');
text(el('access-preset'), context.presetName || 'None');
text(el('access-readonly'), context.readOnly ? 'On: tools that change GitLab are off' : 'Off');
// What this chat has off: the account's choices and its preset's.
var off = (context.disabledToolGroups || []).map(function (group) {
return (settings.schema.properties['tools_' + group] || {}).title || group;
});
text(el('access-groups'), off.length ? off.join(', ') : 'All offered groups are on');
}
function renderHealth(check) {
var status = el('health-status');
if (!check) return;
if (check.authenticated) {
status.className = 'status-ok';
text(status, 'Connected');
} else if (check.reachable === false) {
// GitLab did not answer: an outage, so no reconnect is suggested.
status.className = 'status-error';
text(status, 'GitLab is not reachable right now. Your saved settings still apply; try again in a moment.');
} else {
status.className = 'status-error';
text(status, 'GitLab did not accept the current sign-in');
}
text(el('health-account'), check.account);
text(el('health-instance'), check.instance);
text(el('health-gitlab'), check.gitlabVersion + ' (' + check.tier + ')');
text(el('health-tools'), check.availableTools);
var advice = el('health-advice');
clear(advice);
(check.warnings || []).concat(check.recommendations || []).forEach(function (line) {
var item = document.createElement('li');
text(item, line);
advice.appendChild(item);
});
el('health-advice-block').hidden = advice.childNodes.length === 0;
}
function renderResults() {
var list = el('results');
clear(list);
if (state.query.length >= 2 && state.results.length === 0 && !state.searching) {
var empty = document.createElement('li');
empty.setAttribute('role', 'option');
empty.setAttribute('aria-disabled', 'true');
text(empty, 'No project or group matches “' + state.query + '”');
list.appendChild(empty);
return;
}
state.results.forEach(function (target, index) {
var item = document.createElement('li');
item.id = 'result-' + index;
item.setAttribute('role', 'option');
item.tabIndex = 0;
var selected = state.selected && state.selected.path === target.path && state.selected.type === target.type;
item.setAttribute('aria-selected', selected ? 'true' : 'false');
var name = document.createElement('span');
text(name, target.name);
var kind = document.createElement('span');
kind.className = 'kind';
text(kind, target.type + ' · ' + target.path);
item.appendChild(name);
item.appendChild(kind);
item.addEventListener('click', function () { select(target); });
item.addEventListener('keydown', function (event) {
if (event.key === 'Enter' || event.key === ' ') { event.preventDefault(); select(target); }
if (event.key === 'ArrowDown' && item.nextSibling) item.nextSibling.focus();
if (event.key === 'ArrowUp' && item.previousSibling) item.previousSibling.focus();
});
list.appendChild(item);
});
}
function renderSelection() {
var target = state.selected;
var subgroups = el('subgroups');
el('subgroups-row').hidden = !target || target.type !== 'group';
text(el('preview'), target
? 'Selected: ' + describeScope({ type: target.type, path: target.path, includeSubgroups: subgroups.checked })
: 'Choose a project or group to work in.');
el('use-chat').disabled = !target || state.busy;
el('save-default').disabled = !target || state.busy;
el('cancel').disabled = !target || state.busy;
}
function select(target) {
state.selected = target;
renderResults();
renderSelection();
}
function setBusy(busy) {
state.busy = busy;
['use-chat', 'save-default', 'work-everywhere', 'check-again'].forEach(function (id) {
el(id).disabled = busy;
});
renderSelection();
document.body.setAttribute('aria-busy', busy ? 'true' : 'false');
}
// ---- Data: always the server's authoritative state ----
function reload() {
return Promise.all([
callTool('get_settings', {}),
callTool('manage_context', { action: 'show' }),
]).then(function (results) {
state.settings = results[0];
state.context = results[1].data || results[1];
renderContext();
});
}
function checkHealth() {
text(el('health-status'), 'Checking…');
el('health-status').className = 'muted';
return callTool('check_connection', {}).then(renderHealth).catch(function (error) {
el('health-status').className = 'status-error';
text(el('health-status'), explain(error));
});
}
var searchTimer = null;
// Only the newest search may change the panel; an older one finishing late is ignored.
var searchGeneration = 0;
function search(query) {
state.query = query.trim();
clearTimeout(searchTimer);
var generation = ++searchGeneration;
if (state.query.length < 2) { state.results = []; state.searching = false; renderResults(); return; }
searchTimer = setTimeout(function () {
var current = function () { return generation === searchGeneration; };
state.searching = true;
callTool('find_scope_targets', { query: state.query }).then(function (found) {
if (current()) state.results = found.targets || [];
}).catch(function (error) {
if (!current()) return;
state.results = [];
announce(explain(error), 'error');
}).then(function () {
if (!current()) return;
state.searching = false;
renderResults();
renderSelection();
});
}, 300);
}
function save(where) {
var target = state.selected;
if (!target) return;
var includeSubgroups = target.type === 'group' && el('subgroups').checked;
setBusy(true);
announce('Saving…');
var action = where === 'chat'
? callTool('manage_context', { action: 'set_scope', namespace: target.path, includeSubgroups: includeSubgroups })
: callTool('update_settings', { set: { scope: target.path, scopeIncludeSubgroups: includeSubgroups } });
action.then(reload).then(function () {
// Success is reported from what the server now holds, not from the request.
var applied = where === 'chat'
? state.context.scope && state.context.scope.path === target.path
: state.settings.values.scope === target.path;
if (applied) {
announce(where === 'chat'
? 'This chat now works in ' + describeScope(state.context.scope) + '.'
: 'Your chats now work in ' + target.path + ', except chats that chose otherwise.', 'ok');
state.selected = null;
renderResults();
} else {
announce('The server did not keep this change. Check the settings and try again.', 'error');
}
}).catch(function (error) {
announce(explain(error), 'error');
}).then(function () { setBusy(false); });
}
function workEverywhere() {
setBusy(true);
announce('Saving…');
// Only this chat's scope changes; its preset, read-only mode and the account's default
// stay as they are.
callTool('manage_context', { action: 'clear_scope' })
.then(reload)
.then(function () {
announce(state.context.scope ? 'A preset still limits where this chat works.' : 'This chat works everywhere you have access.',
state.context.scope ? 'warning' : 'ok');
})
.catch(function (error) { announce(explain(error), 'error'); })
.then(function () { setBusy(false); });
}
function start() {
el('search').addEventListener('input', function (event) { search(event.target.value); });
el('subgroups').addEventListener('change', renderSelection);
el('use-chat').addEventListener('click', function () { save('chat'); });
el('save-default').addEventListener('click', function () { save('default'); });
el('cancel').addEventListener('click', function () { state.selected = null; renderResults(); renderSelection(); announce(''); });
el('work-everywhere').addEventListener('click', workEverywhere);
el('check-again').addEventListener('click', checkHealth);
document.addEventListener('visibilitychange', function () {
if (document.visibilityState === 'visible' && !state.busy) reload().catch(function () {});
});
if (typeof ResizeObserver === 'function') {
new ResizeObserver(function () {
notify('ui/notifications/size-changed', { height: document.documentElement.scrollHeight });
}).observe(document.body);
}
renderSelection();
request('ui/initialize', {
appInfo: { name: 'gitlab-mcp-settings', version: VERSION },
appCapabilities: {},
protocolVersion: PROTOCOL,
}).then(function (result) {
applyHostContext(result && result.hostContext);
notify('ui/notifications/initialized');
if (!result || !result.hostCapabilities || !result.hostCapabilities.serverTools) {
el('main').hidden = true;
announce('This app cannot reach the GitLab server from here. Use the GitLab settings page, or ask the assistant to change the settings.', 'error');
return;
}
el('loading').hidden = true;
el('main').hidden = false;
return Promise.all([reload(), checkHealth()]);
}).catch(function (error) {
el('loading').hidden = true;
announce(explain(error), 'error');
});
}
if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', start);
else start();
})();
`;
const BODY = `
<header>
<h1>GitLab connection</h1>
<p class="muted">Choose where this chat works and check what the connection can do.</p>
</header>
<p id="loading" class="muted" role="status">Loading…</p>
<div id="main" hidden>
<section aria-labelledby="where-title">
<h2 id="where-title">Where to work</h2>
<dl>
<dt>This chat</dt><dd id="chat-scope"></dd>
<dt>All chats</dt><dd id="default-scope"></dd>
</dl>
<div style="margin-top:12px">
<label for="search">Find a project or group</label>
<input id="search" type="search" autocomplete="off" spellcheck="false"
placeholder="At least 2 characters" aria-controls="results" />
<ul id="results" class="results" role="listbox" aria-label="Projects and groups"></ul>
</div>
<p id="preview" class="muted"></p>
<div id="subgroups-row" class="row" hidden>
<input id="subgroups" type="checkbox" checked />
<label for="subgroups" style="display:inline;font-weight:normal">Include projects in subgroups</label>
</div>
<div class="row" style="margin-top:8px">
<button id="use-chat" class="primary" type="button">Use in this chat</button>
<button id="save-default" type="button">Save for all chats</button>
<button id="cancel" type="button">Cancel</button>
<button id="work-everywhere" type="button">Work everywhere in this chat</button>
</div>
</section>
<section aria-labelledby="access-title">
<h2 id="access-title">What this chat can do</h2>
<dl>
<dt>Preset</dt><dd id="access-preset"></dd>
<dt>Read-only</dt><dd id="access-readonly"></dd>
<dt>Tool groups off</dt><dd id="access-groups"></dd>
</dl>
<p class="muted">Presets, read-only mode and tool groups are changed on the GitLab settings page.</p>
</section>
<section aria-labelledby="health-title">
<h2 id="health-title">Connection</h2>
<p id="health-status" class="muted" role="status"></p>
<dl>
<dt>Account</dt><dd id="health-account"></dd>
<dt>GitLab</dt><dd id="health-instance"></dd>
<dt>Version</dt><dd id="health-gitlab"></dd>
<dt>Tools available</dt><dd id="health-tools"></dd>
</dl>
<div id="health-advice-block" hidden>
<h2 style="margin-top:8px">What to check</h2>
<ul id="health-advice" class="plain"></ul>
</div>
<div class="row" style="margin-top:8px">
<button id="check-again" type="button">Check again</button>
</div>
</section>
</div>
<div id="notice" role="status" aria-live="polite"></div>
`;
/** The panel document. */
export function settingsPanelHtml(): string {
return [
'<!doctype html>',
'<html lang="en">',
'<head>',
'<meta charset="utf-8" />',
'<meta name="viewport" content="width=device-width, initial-scale=1" />',
'<title>GitLab connection</title>',
`<style>${STYLE}</style>`,
'</head>',
'<body>',
BODY,
`<script>${SCRIPT}</script>`,
'</body>',
'</html>',
].join('\n');
}
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