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* Context Manager - the manage_context view of the caller's configuration
*
* Every action applies to the caller of the running tool call and to its current MCP
* session: another user's or another chat's context never changes. Presets and scopes are
* session overrides of the configuration service, so they take effect in tool execution;
* the account defaults are changed through the settings tools.
*/
import { GITLAB_BASE_URL, GITLAB_READ_ONLY_MODE } from '../../config';
import { logInfo, logError } from '../../logger';
import { ProfileLoader } from '../../profiles/loader';
import { ScopeConfig } from '../../profiles/types';
import { findNamespaceType } from '../../utils/namespace';
import {
currentCaller,
getConfigurationService,
resolveCaller,
type Caller,
type ResolvedConfiguration,
} from '../../configuration';
import { EVERYWHERE } from '../../configuration/policy';
import {
PresetInfo,
ResetResult,
RuntimeScope,
SessionContext,
SetScopeResult,
SwitchResult,
} from './types';
function isOAuthMode(): boolean {
return process.env.OAUTH_ENABLED === 'true';
}
function hostOf(url: string): string {
try {
return new URL(url).hostname;
} catch {
return url;
}
}
/** Convert a scope configuration to the runtime view shown to the caller. */
export function runtimeScopeOf(scope: ScopeConfig, detected: boolean): RuntimeScope {
if (scope.project) {
return { type: 'project', path: scope.project, includeSubgroups: false, detected };
}
if (scope.group ?? scope.namespace) {
return {
type: 'group',
path: (scope.group ?? scope.namespace) as string,
includeSubgroups: scope.includeSubgroups !== false,
detected,
};
}
if (scope.projects && scope.projects.length > 0) {
return {
type: 'project',
path: scope.projects[0],
additionalPaths: scope.projects.length > 1 ? scope.projects.slice(1) : undefined,
includeSubgroups: false,
detected,
};
}
if (scope.groups && scope.groups.length > 0) {
return {
type: 'group',
path: scope.groups[0],
additionalPaths: scope.groups.length > 1 ? scope.groups.slice(1) : undefined,
includeSubgroups: scope.includeSubgroups !== false,
detected,
};
}
logError('Invalid scope configuration: no usable scope fields found', { scope });
throw new Error(
'Invalid scope configuration: expected project, group, namespace, projects, or groups to be defined',
);
}
export class ContextManager {
private static instance: ContextManager | null = null;
private readonly profileLoader = new ProfileLoader();
static getInstance(): ContextManager {
ContextManager.instance ??= new ContextManager();
return ContextManager.instance;
}
/** Reset the singleton instance (for testing) */
static resetInstance(): void {
ContextManager.instance = null;
}
/** The caller of the running tool call; the server's own token outside one. */
private caller(): Caller {
return currentCaller() ?? resolveCaller(undefined, GITLAB_BASE_URL);
}
/** What the operator configured, before any account or session choice. */
private operatorContext(caller: Caller): Omit<SessionContext, 'initialContext'> {
return {
host: hostOf(caller.instanceUrl),
apiUrl: caller.instanceUrl,
readOnly: GITLAB_READ_ONLY_MODE,
oauthMode: isOAuthMode(),
};
}
private contextOf(caller: Caller, resolved: ResolvedConfiguration): SessionContext {
const operator = this.operatorContext(caller);
const scope = resolved.policy.scope;
return {
...operator,
readOnly: operator.readOnly || resolved.policy.readOnly,
presetName: resolved.policy.presetName,
disabledToolGroups: [...resolved.policy.disabledGroups].sort((a, b) => a.localeCompare(b)),
scope: scope
? runtimeScopeOf(
scope,
resolved.session.scope !== undefined && resolved.session.scope !== EVERYWHERE,
)
: undefined,
initialContext: operator,
};
}
/** The caller's current context: operator settings narrowed by account and session. */
async getContext(): Promise<SessionContext> {
const caller = this.caller();
return this.contextOf(caller, await getConfigurationService().resolve(caller));
}
async listPresets(): Promise<PresetInfo[]> {
const profiles = await this.profileLoader.listProfiles();
return profiles
.filter((p) => p.isPreset)
.map((p) => ({
name: p.name,
description: p.description,
readOnly: p.readOnly,
isBuiltIn: p.isBuiltIn,
}));
}
/** Use a preset in the current session; the account default stays as it is. */
async switchPreset(presetName: string): Promise<SwitchResult> {
const caller = this.caller();
const service = getConfigurationService();
const previous = (await service.resolve(caller)).policy.presetName;
try {
await service.updateSession(caller, { preset: presetName });
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
logError('Failed to switch preset', { error: message, preset: presetName });
throw new Error(`Failed to switch to preset '${presetName}': ${message}`, { cause: error });
}
logInfo('Switched preset for session', { previous, current: presetName });
return {
success: true,
previous,
current: presetName,
message: `Switched this session to preset '${presetName}'`,
};
}
/** Limit the current session to a project or group, detecting which one it is. */
async setScope(namespace: string, includeSubgroups: boolean = true): Promise<SetScopeResult> {
try {
// Confirmed by GitLab, so a typo is reported instead of becoming a guessed scope.
let canonicalPath = namespace;
const type = await findNamespaceType(namespace, (path) => {
canonicalPath = path;
});
if (!type) {
throw new Error(
`No project or group '${namespace}' was found on GitLab, or GitLab could not be reached`,
);
}
const scope = {
type,
path: canonicalPath,
includeSubgroups: type === 'group' ? includeSubgroups : false,
};
await getConfigurationService().updateSession(this.caller(), { scope });
logInfo('Scope set with auto-detection', { namespace, type, includeSubgroups });
return {
success: true,
scope: { ...scope, detected: true },
message: `Scope set to ${type} '${canonicalPath}'${
type === 'group' && includeSubgroups ? ' (including subgroups)' : ''
}`,
};
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
logError('Failed to set scope', { error: message, namespace });
throw new Error(`Failed to set scope for '${namespace}': ${message}`, { cause: error });
}
}
/**
* Let the current session work everywhere the account has access: its own scope and the
* account's default scope no longer apply to it. Its other overrides stay.
*/
async clearScope(): Promise<ResetResult> {
await getConfigurationService().updateSession(this.caller(), { scope: EVERYWHERE });
logInfo('Session scope cleared');
return {
success: true,
message: 'This session now works everywhere the account has access',
context: await this.getContext(),
};
}
/** Drop the session's preset, scope and profile: the account settings apply again. */
async reset(): Promise<ResetResult> {
await getConfigurationService().resetSession(this.caller());
logInfo('Session context reset');
return {
success: true,
message: 'Session context reset to the account settings',
context: await this.getContext(),
};
}
}
export function getContextManager(): ContextManager {
return ContextManager.getInstance();
}
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