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source dump of claude code forked from oppi.li/claude-code
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/* eslint-disable @typescript-eslint/no-require-imports */const fetchMcpSkillsForClient = feature('MCP_SKILLS') ? ( require('../../skills/mcpSkills.js') as typeof import('../../skills/mcpSkills.js') ).fetchMcpSkillsForClient : nullconst clearSkillIndexCache = feature('EXPERIMENTAL_SKILL_SEARCH') ? ( require('../skillSearch/localSearch.js') as typeof import('../skillSearch/localSearch.js') ).clearSkillIndexCache : null
import { PromptListChangedNotificationSchema, ResourceListChangedNotificationSchema, ToolListChangedNotificationSchema,} from '@modelcontextprotocol/sdk/types.js'import omit from 'lodash-es/omit.js'import reject from 'lodash-es/reject.js'import { type AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, logEvent,} from 'src/services/analytics/index.js'import { dedupClaudeAiMcpServers, doesEnterpriseMcpConfigExist, filterMcpServersByPolicy, getClaudeCodeMcpConfigs, isMcpServerDisabled, setMcpServerEnabled,} from 'src/services/mcp/config.js'import type { AppState } from 'src/state/AppState.js'import type { PluginError } from 'src/types/plugin.js'import { logForDebugging } from 'src/utils/debug.js'import { getAllowedChannels } from '../../bootstrap/state.js'import { useNotifications } from '../../context/notifications.js'import { useAppState, useAppStateStore, useSetAppState,} from '../../state/AppState.js'import { errorMessage } from '../../utils/errors.js'/* eslint-enable @typescript-eslint/no-require-imports */import { logMCPDebug, logMCPError } from '../../utils/log.js'import { enqueue } from '../../utils/messageQueueManager.js'import { CHANNEL_PERMISSION_METHOD, ChannelMessageNotificationSchema, ChannelPermissionNotificationSchema, findChannelEntry, gateChannelServer, wrapChannelMessage,} from './channelNotification.js'import { type ChannelPermissionCallbacks, createChannelPermissionCallbacks, isChannelPermissionRelayEnabled,} from './channelPermissions.js'import { clearClaudeAIMcpConfigsCache, fetchClaudeAIMcpConfigsIfEligible,} from './claudeai.js'import { registerElicitationHandler } from './elicitationHandler.js'import { getMcpPrefix } from './mcpStringUtils.js'import { commandBelongsToServer, excludeStalePluginClients } from './utils.js'
// Constants for reconnection with exponential backoffconst MAX_RECONNECT_ATTEMPTS = 5const INITIAL_BACKOFF_MS = 1000const MAX_BACKOFF_MS = 30000
/** * Create a unique key for a plugin error to enable deduplication */function getErrorKey(error: PluginError): string { const plugin = 'plugin' in error ? error.plugin : 'no-plugin' return `${error.type}:${error.source}:${plugin}`}
/** * Add errors to AppState, deduplicating to avoid showing the same error multiple times */function addErrorsToAppState( setAppState: (updater: (prev: AppState) => AppState) => void, newErrors: PluginError[],): void { if (newErrors.length === 0) return
setAppState(prevState => { // Build set of existing error keys const existingKeys = new Set( prevState.plugins.errors.map(e => getErrorKey(e)), )
// Only add errors that don't already exist const uniqueNewErrors = newErrors.filter( error => !existingKeys.has(getErrorKey(error)), )
if (uniqueNewErrors.length === 0) { return prevState }
return { ...prevState, plugins: { ...prevState.plugins, errors: [...prevState.plugins.errors, ...uniqueNewErrors], }, } })}
/** * Hook to manage MCP (Model Context Protocol) server connections and updates * * This hook: * 1. Initializes MCP client connections based on config * 2. Sets up handlers for connection lifecycle events and sync with app state * 3. Manages automatic reconnection for SSE connections * 4. Returns a reconnect function */export function useManageMCPConnections( dynamicMcpConfig: Record<string, ScopedMcpServerConfig> | undefined, isStrictMcpConfig = false,) { const store = useAppStateStore() const _authVersion = useAppState(s => s.authVersion) // Incremented by /reload-plugins (refreshActivePlugins) to pick up newly // enabled plugin MCP servers. getClaudeCodeMcpConfigs() reads loadAllPlugins() // which has been cleared by refreshActivePlugins, so the effects below see // fresh plugin data on re-run. const _pluginReconnectKey = useAppState(s => s.mcp.pluginReconnectKey) const setAppState = useSetAppState()
// Track active reconnection attempts to allow cancellation const reconnectTimersRef = useRef<Map<string, NodeJS.Timeout>>(new Map())
// Dedup the --channels blocked warning per skip kind so that a user who // sees "run /login" (auth skip), logs in, then hits the policy gate // gets a second toast. const channelWarnedKindsRef = useRef< Set<'disabled' | 'auth' | 'policy' | 'marketplace' | 'allowlist'> >(new Set()) // Channel permission callbacks — constructed once, stable ref. Stored in // AppState so interactiveHandler can subscribe. The pending Map lives inside // the closure (not module-level, not AppState — functions-in-state is brittle). const channelPermCallbacksRef = useRef<ChannelPermissionCallbacks | null>( null, ) if ( (feature('KAIROS') || feature('KAIROS_CHANNELS')) && channelPermCallbacksRef.current === null ) { channelPermCallbacksRef.current = createChannelPermissionCallbacks() } // Store callbacks in AppState so interactiveHandler.ts can reach them via // ctx.toolUseContext.getAppState(). One-time set — the ref is stable. useEffect(() => { if (feature('KAIROS') || feature('KAIROS_CHANNELS')) { const callbacks = channelPermCallbacksRef.current if (!callbacks) return // GrowthBook runtime gate — separate from channels so channels can // ship without this. Checked at mount; mid-session flips need restart. // If off, callbacks never go into AppState → interactiveHandler sees // undefined → never sends → intercept has nothing pending → "yes tbxkq" // flows to Claude as normal chat. One gate, full disable. if (!isChannelPermissionRelayEnabled()) return setAppState(prev => { if (prev.channelPermissionCallbacks === callbacks) return prev return { ...prev, channelPermissionCallbacks: callbacks } }) return () => { setAppState(prev => { if (prev.channelPermissionCallbacks === undefined) return prev return { ...prev, channelPermissionCallbacks: undefined } }) } } }, [setAppState]) const { addNotification } = useNotifications()
// Batched MCP state updates: queue individual server updates and flush them // in a single setAppState call via setTimeout. Using a time-based window // (instead of queueMicrotask) ensures updates are batched even when // connection callbacks arrive at different times due to network I/O. const MCP_BATCH_FLUSH_MS = 16 type PendingUpdate = MCPServerConnection & { tools?: Tool[] commands?: Command[] resources?: ServerResource[] } const pendingUpdatesRef = useRef<PendingUpdate[]>([]) const flushTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
const flushPendingUpdates = useCallback(() => { flushTimerRef.current = null const updates = pendingUpdatesRef.current if (updates.length === 0) return pendingUpdatesRef.current = []
setAppState(prevState => { let mcp = prevState.mcp
for (const update of updates) { const { tools: rawTools, commands: rawCmds, resources: rawRes, ...client } = update const tools = client.type === 'disabled' || client.type === 'failed' ? (rawTools ?? []) : rawTools const commands = client.type === 'disabled' || client.type === 'failed' ? (rawCmds ?? []) : rawCmds const resources = client.type === 'disabled' || client.type === 'failed' ? (rawRes ?? []) : rawRes
const prefix = getMcpPrefix(client.name) const existingClientIndex = mcp.clients.findIndex( c => c.name === client.name, )
const updatedClients = existingClientIndex === -1 ? [...mcp.clients, client] : mcp.clients.map(c => (c.name === client.name ? client : c))
const updatedTools = tools === undefined ? mcp.tools : [...reject(mcp.tools, t => t.name?.startsWith(prefix)), ...tools]
const updatedCommands = commands === undefined ? mcp.commands : [ ...reject(mcp.commands, c => commandBelongsToServer(c, client.name), ), ...commands, ]
const updatedResources = resources === undefined ? mcp.resources : { ...mcp.resources, ...(resources.length > 0 ? { [client.name]: resources } : omit(mcp.resources, client.name)), }
mcp = { ...mcp, clients: updatedClients, tools: updatedTools, commands: updatedCommands, resources: updatedResources, } }
return { ...prevState, mcp } }) }, [setAppState])
// Update server state, tools, commands, and resources. // When tools, commands, or resources are undefined, the existing values are preserved. // When type is 'disabled' or 'failed', tools/commands/resources are automatically cleared. // Updates are batched via setTimeout to coalesce updates arriving within MCP_BATCH_FLUSH_MS. const updateServer = useCallback( (update: PendingUpdate) => { pendingUpdatesRef.current.push(update) if (flushTimerRef.current === null) { flushTimerRef.current = setTimeout( flushPendingUpdates, MCP_BATCH_FLUSH_MS, ) } }, [flushPendingUpdates], )
const onConnectionAttempt = useCallback( ({ client, tools, commands, resources, }: { client: MCPServerConnection tools: Tool[] commands: Command[] resources?: ServerResource[] }) => { updateServer({ ...client, tools, commands, resources })
// Handle side effects based on client state switch (client.type) { case 'connected': { // Overwrite the default elicitation handler registered in connectToServer // with the real one (queues elicitation in AppState for UI). Registering // here (once per connect) instead of in a [mcpClients] effect avoids // re-running for every already-connected server on each state change. registerElicitationHandler(client.client, client.name, setAppState)
client.client.onclose = () => { const configType = client.config.type ?? 'stdio'
clearServerCache(client.name, client.config).catch(() => { logForDebugging( `Failed to invalidate the server cache: ${client.name}`, ) })
// TODO: This really isn't great: ideally we'd check appstate as the source of truth // as to whether it was disconnected due to a disable, but appstate is stale at this // point. Getting a live reference to appstate feels a little hacky, so we'll just // check the disk state. We may want to refactor some of this. if (isMcpServerDisabled(client.name)) { logMCPDebug( client.name, `Server is disabled, skipping automatic reconnection`, ) return }
// Handle automatic reconnection for remote transports // Skip stdio (local process) and sdk (internal) - they don't support reconnection if (configType !== 'stdio' && configType !== 'sdk') { const transportType = getTransportDisplayName(configType) logMCPDebug( client.name, `${transportType} transport closed/disconnected, attempting automatic reconnection`, )
// Cancel any existing reconnection attempt for this server const existingTimer = reconnectTimersRef.current.get(client.name) if (existingTimer) { clearTimeout(existingTimer) reconnectTimersRef.current.delete(client.name) }
// Attempt reconnection with exponential backoff const reconnectWithBackoff = async () => { for ( let attempt = 1; attempt <= MAX_RECONNECT_ATTEMPTS; attempt++ ) { // Check if server was disabled while we were waiting if (isMcpServerDisabled(client.name)) { logMCPDebug( client.name, `Server disabled during reconnection, stopping retry`, ) reconnectTimersRef.current.delete(client.name) return }
updateServer({ ...client, type: 'pending', reconnectAttempt: attempt, maxReconnectAttempts: MAX_RECONNECT_ATTEMPTS, })
const reconnectStartTime = Date.now() try { const result = await reconnectMcpServerImpl( client.name, client.config, ) const elapsed = Date.now() - reconnectStartTime
if (result.client.type === 'connected') { logMCPDebug( client.name, `${transportType} reconnection successful after ${elapsed}ms (attempt ${attempt})`, ) reconnectTimersRef.current.delete(client.name) onConnectionAttempt(result) return }
logMCPDebug( client.name, `${transportType} reconnection attempt ${attempt} completed with status: ${result.client.type}`, )
// On final attempt, update state with the result if (attempt === MAX_RECONNECT_ATTEMPTS) { logMCPDebug( client.name, `Max reconnection attempts (${MAX_RECONNECT_ATTEMPTS}) reached, giving up`, ) reconnectTimersRef.current.delete(client.name) onConnectionAttempt(result) return } } catch (error) { const elapsed = Date.now() - reconnectStartTime logMCPError( client.name, `${transportType} reconnection attempt ${attempt} failed after ${elapsed}ms: ${error}`, )
// On final attempt, mark as failed if (attempt === MAX_RECONNECT_ATTEMPTS) { logMCPDebug( client.name, `Max reconnection attempts (${MAX_RECONNECT_ATTEMPTS}) reached, giving up`, ) reconnectTimersRef.current.delete(client.name) updateServer({ ...client, type: 'failed' }) return } }
// Schedule next retry with exponential backoff const backoffMs = Math.min( INITIAL_BACKOFF_MS * Math.pow(2, attempt - 1), MAX_BACKOFF_MS, ) logMCPDebug( client.name, `Scheduling reconnection attempt ${attempt + 1} in ${backoffMs}ms`, )
await new Promise<void>(resolve => { // eslint-disable-next-line no-restricted-syntax -- timer stored in ref for cancellation; sleep() doesn't expose the handle const timer = setTimeout(resolve, backoffMs) reconnectTimersRef.current.set(client.name, timer) }) } }
void reconnectWithBackoff() } else { updateServer({ ...client, type: 'failed' }) } }
// Channel push: notifications/claude/channel → enqueue(). // Gate decides whether to register the handler; connection stays // up either way (allowedMcpServers controls that). if (feature('KAIROS') || feature('KAIROS_CHANNELS')) { const gate = gateChannelServer( client.name, client.capabilities, client.config.pluginSource, ) const entry = findChannelEntry(client.name, getAllowedChannels()) // Plugin identifier for telemetry — log name@marketplace for any // plugin-kind entry (same tier as tengu_plugin_installed, which // logs arbitrary plugin_id+marketplace_name ungated). server-kind // names are MCP-server-name tier; those are opt-in-only elsewhere // (see isAnalyticsToolDetailsLoggingEnabled in metadata.ts) and // stay unlogged here. is_dev/entry_kind segment the rest. const pluginId = entry?.kind === 'plugin' ? (`${entry.name}@${entry.marketplace}` as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS) : undefined // Skip capability-miss — every non-channel MCP server trips it. if (gate.action === 'register' || gate.kind !== 'capability') { logEvent('tengu_mcp_channel_gate', { registered: gate.action === 'register', skip_kind: gate.action === 'skip' ? (gate.kind as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS) : undefined, entry_kind: entry?.kind as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, is_dev: entry?.dev ?? false, plugin: pluginId, }) } switch (gate.action) { case 'register': logMCPDebug(client.name, 'Channel notifications registered') client.client.setNotificationHandler( ChannelMessageNotificationSchema(), async notification => { const { content, meta } = notification.params logMCPDebug( client.name, `notifications/claude/channel: ${content.slice(0, 80)}`, ) logEvent('tengu_mcp_channel_message', { content_length: content.length, meta_key_count: Object.keys(meta ?? {}).length, entry_kind: entry?.kind as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, is_dev: entry?.dev ?? false, plugin: pluginId, }) enqueue({ mode: 'prompt', value: wrapChannelMessage(client.name, content, meta), priority: 'next', isMeta: true, origin: { kind: 'channel', server: client.name }, skipSlashCommands: true, }) }, ) // Permission-reply handler — separate event, separate // capability. Only registers if the server declares // claude/channel/permission (same opt-in check as the send // path in interactiveHandler.ts). Server parses the user's // reply and emits {request_id, behavior}; no regex on our // side, text in the general channel can't accidentally match. if ( client.capabilities?.experimental?.[ 'claude/channel/permission' ] !== undefined ) { client.client.setNotificationHandler( ChannelPermissionNotificationSchema(), async notification => { const { request_id, behavior } = notification.params const resolved = channelPermCallbacksRef.current?.resolve( request_id, behavior, client.name, ) ?? false logMCPDebug( client.name, `notifications/claude/channel/permission: ${request_id} → ${behavior} (${resolved ? 'matched pending' : 'no pending entry — stale or unknown ID'})`, ) }, ) } break case 'skip': // Idempotent teardown so a register→skip re-gate (e.g. // effect re-runs after /logout) actually removes the live // handler. Without this, mid-session demotion is one-way: // the gate says skip but the earlier handler keeps enqueuing. // Map.delete — safe when never registered. client.client.removeNotificationHandler( 'notifications/claude/channel', ) client.client.removeNotificationHandler( CHANNEL_PERMISSION_METHOD, ) logMCPDebug( client.name, `Channel notifications skipped: ${gate.reason}`, ) // Surface a once-per-kind toast when a channel server is // blocked. This is the only // user-visible signal (logMCPDebug above requires --debug). // Capability/session skips are expected noise and stay // debug-only. marketplace/allowlist run after session — if // we're here with those kinds, the user asked for it. if ( gate.kind !== 'capability' && gate.kind !== 'session' && !channelWarnedKindsRef.current.has(gate.kind) && (gate.kind === 'marketplace' || gate.kind === 'allowlist' || entry !== undefined) ) { channelWarnedKindsRef.current.add(gate.kind) // disabled/auth/policy get custom toast copy (shorter, actionable); // marketplace/allowlist reuse the gate's reason verbatim // since it already names the mismatch. const text = gate.kind === 'disabled' ? 'Channels are not currently available' : gate.kind === 'auth' ? 'Channels require claude.ai authentication · run /login' : gate.kind === 'policy' ? 'Channels are not enabled for your org · have an administrator set channelsEnabled: true in managed settings' : gate.reason addNotification({ key: `channels-blocked-${gate.kind}`, priority: 'high', text, color: 'warning', timeoutMs: 12000, }) } break } }
// Register notification handlers for list_changed notifications // These allow the server to notify us when tools, prompts, or resources change if (client.capabilities?.tools?.listChanged) { client.client.setNotificationHandler( ToolListChangedNotificationSchema, async () => { logMCPDebug( client.name, `Received tools/list_changed notification, refreshing tools`, ) try { // Grab cached promise before invalidating to log previous count const previousToolsPromise = fetchToolsForClient.cache.get( client.name, ) fetchToolsForClient.cache.delete(client.name) const newTools = await fetchToolsForClient(client) const newCount = newTools.length if (previousToolsPromise) { previousToolsPromise.then( (previousTools: Tool[]) => { logEvent('tengu_mcp_list_changed', { type: 'tools' as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, previousCount: previousTools.length, newCount, }) }, () => { logEvent('tengu_mcp_list_changed', { type: 'tools' as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, newCount, }) }, ) } else { logEvent('tengu_mcp_list_changed', { type: 'tools' as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, newCount, }) } updateServer({ ...client, tools: newTools }) } catch (error) { logMCPError( client.name, `Failed to refresh tools after list_changed notification: ${errorMessage(error)}`, ) } }, ) }
if (client.capabilities?.prompts?.listChanged) { client.client.setNotificationHandler( PromptListChangedNotificationSchema, async () => { logMCPDebug( client.name, `Received prompts/list_changed notification, refreshing prompts`, ) logEvent('tengu_mcp_list_changed', { type: 'prompts' as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, }) try { // Skills come from resources, not prompts — don't invalidate their // cache here. fetchMcpSkillsForClient returns the cached result. fetchCommandsForClient.cache.delete(client.name) const [mcpPrompts, mcpSkills] = await Promise.all([ fetchCommandsForClient(client), feature('MCP_SKILLS') ? fetchMcpSkillsForClient!(client) : Promise.resolve([]), ]) updateServer({ ...client, commands: [...mcpPrompts, ...mcpSkills], }) // MCP skills changed — invalidate skill-search index so // next discovery rebuilds with the new set. clearSkillIndexCache?.() } catch (error) { logMCPError( client.name, `Failed to refresh prompts after list_changed notification: ${errorMessage(error)}`, ) } }, ) }
if (client.capabilities?.resources?.listChanged) { client.client.setNotificationHandler( ResourceListChangedNotificationSchema, async () => { logMCPDebug( client.name, `Received resources/list_changed notification, refreshing resources`, ) logEvent('tengu_mcp_list_changed', { type: 'resources' as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, }) try { fetchResourcesForClient.cache.delete(client.name) if (feature('MCP_SKILLS')) { // Skills are discovered from resources, so refresh them too. // Invalidate prompts cache as well: we write commands here, // and a concurrent prompts/list_changed could otherwise have // us stomp its fresh result with our cached stale one. fetchMcpSkillsForClient!.cache.delete(client.name) fetchCommandsForClient.cache.delete(client.name) const [newResources, mcpPrompts, mcpSkills] = await Promise.all([ fetchResourcesForClient(client), fetchCommandsForClient(client), fetchMcpSkillsForClient!(client), ]) updateServer({ ...client, resources: newResources, commands: [...mcpPrompts, ...mcpSkills], }) // MCP skills changed — invalidate skill-search index so // next discovery rebuilds with the new set. clearSkillIndexCache?.() } else { const newResources = await fetchResourcesForClient(client) updateServer({ ...client, resources: newResources }) } } catch (error) { logMCPError( client.name, `Failed to refresh resources after list_changed notification: ${errorMessage(error)}`, ) } }, ) } break }
case 'needs-auth': case 'failed': case 'pending': case 'disabled': break } }, [updateServer], )
// Initialize all servers to pending state if they don't exist in appState. // Re-runs on session change (/clear) and on /reload-plugins (pluginReconnectKey). // On plugin reload, also disconnects stale plugin MCP servers (scope 'dynamic') // that no longer appear in configs — prevents ghost tools from disabled plugins. // Skip claude.ai dedup here to avoid blocking on the network fetch; the connect // useEffect below runs immediately after and dedups before connecting. const sessionId = getSessionId() useEffect(() => { async function initializeServersAsPending() { const { servers: existingConfigs, errors: mcpErrors } = isStrictMcpConfig ? { servers: {}, errors: [] } : await getClaudeCodeMcpConfigs(dynamicMcpConfig) const configs = { ...existingConfigs, ...dynamicMcpConfig }
// Add MCP errors to plugin errors for UI visibility (deduplicated) addErrorsToAppState(setAppState, mcpErrors)
setAppState(prevState => { // Disconnect MCP servers that are stale: plugin servers removed from // config, or any server whose config hash changed (edited .mcp.json). // Stale servers get re-added as 'pending' below since their name is // now absent from mcpWithoutStale.clients. const { stale, ...mcpWithoutStale } = excludeStalePluginClients( prevState.mcp, configs, ) // Clean up stale connections. Fire-and-forget — state updaters must // be synchronous. Three hazards to defuse before calling cleanup: // 1. Pending reconnect timer would fire with the OLD config. // 2. onclose (set at L254) starts reconnectWithBackoff with the // OLD config from its closure — it checks isMcpServerDisabled // but config-changed servers aren't disabled, so it'd race the // fresh connection and last updateServer wins. // 3. clearServerCache internally calls connectToServer (memoized). // For never-connected servers (disabled/pending/failed) the // cache is empty → real connect attempt → spawn/OAuth just to // immediately kill it. Only connected servers need cleanup. for (const s of stale) { const timer = reconnectTimersRef.current.get(s.name) if (timer) { clearTimeout(timer) reconnectTimersRef.current.delete(s.name) } if (s.type === 'connected') { s.client.onclose = undefined void clearServerCache(s.name, s.config).catch(() => {}) } }
const existingServerNames = new Set( mcpWithoutStale.clients.map(c => c.name), ) const newClients = Object.entries(configs) .filter(([name]) => !existingServerNames.has(name)) .map(([name, config]) => ({ name, type: isMcpServerDisabled(name) ? ('disabled' as const) : ('pending' as const), config, }))
if (newClients.length === 0 && stale.length === 0) { return prevState }
return { ...prevState, mcp: { ...prevState.mcp, ...mcpWithoutStale, clients: [...mcpWithoutStale.clients, ...newClients], }, } }) }
void initializeServersAsPending().catch(error => { logMCPError( 'useManageMCPConnections', `Failed to initialize servers as pending: ${errorMessage(error)}`, ) }) }, [ isStrictMcpConfig, dynamicMcpConfig, setAppState, sessionId, _pluginReconnectKey, ])
// Load MCP configs and connect to servers // Two-phase loading: Claude Code configs first (fast), then claude.ai configs (may be slow) useEffect(() => { let cancelled = false
async function loadAndConnectMcpConfigs() { // Clear claude.ai MCP cache so we fetch fresh configs with current auth // state. This is important when authVersion changes (e.g., after login/ // logout). Kick off the fetch now so it overlaps with loadAllPlugins() // inside getClaudeCodeMcpConfigs; it's awaited only at the dedup step. // Phase 2 below awaits the same promise — no second network call. let claudeaiPromise: Promise<Record<string, ScopedMcpServerConfig>> if (isStrictMcpConfig || doesEnterpriseMcpConfigExist()) { claudeaiPromise = Promise.resolve({}) } else { clearClaudeAIMcpConfigsCache() claudeaiPromise = fetchClaudeAIMcpConfigsIfEligible() }
// Phase 1: Load Claude Code configs. Plugin MCP servers that duplicate a // --mcp-config entry or a claude.ai connector are suppressed here so they // don't connect alongside the connector in Phase 2. const { servers: claudeCodeConfigs, errors: mcpErrors } = isStrictMcpConfig ? { servers: {}, errors: [] } : await getClaudeCodeMcpConfigs(dynamicMcpConfig, claudeaiPromise) if (cancelled) return
// Add MCP errors to plugin errors for UI visibility (deduplicated) addErrorsToAppState(setAppState, mcpErrors)
const configs = { ...claudeCodeConfigs, ...dynamicMcpConfig }
// Start connecting to Claude Code servers (don't wait - runs concurrently with Phase 2) // Filter out disabled servers to avoid unnecessary connection attempts const enabledConfigs = Object.fromEntries( Object.entries(configs).filter(([name]) => !isMcpServerDisabled(name)), ) getMcpToolsCommandsAndResources( onConnectionAttempt, enabledConfigs, ).catch(error => { logMCPError( 'useManageMcpConnections', `Failed to get MCP resources: ${errorMessage(error)}`, ) })
// Phase 2: Await claude.ai configs (started above; memoized — no second fetch) let claudeaiConfigs: Record<string, ScopedMcpServerConfig> = {} if (!isStrictMcpConfig) { claudeaiConfigs = filterMcpServersByPolicy( await claudeaiPromise, ).allowed if (cancelled) return
// Suppress claude.ai connectors that duplicate an enabled manual server. // Keys never collide (`slack` vs `claude.ai Slack`) so the merge below // won't catch this — need content-based dedup by URL signature. if (Object.keys(claudeaiConfigs).length > 0) { const { servers: dedupedClaudeAi } = dedupClaudeAiMcpServers( claudeaiConfigs, configs, ) claudeaiConfigs = dedupedClaudeAi }
if (Object.keys(claudeaiConfigs).length > 0) { // Add claude.ai servers as pending immediately so they show up in UI setAppState(prevState => { const existingServerNames = new Set( prevState.mcp.clients.map(c => c.name), ) const newClients = Object.entries(claudeaiConfigs) .filter(([name]) => !existingServerNames.has(name)) .map(([name, config]) => ({ name, type: isMcpServerDisabled(name) ? ('disabled' as const) : ('pending' as const), config, })) if (newClients.length === 0) return prevState return { ...prevState, mcp: { ...prevState.mcp, clients: [...prevState.mcp.clients, ...newClients], }, } })
// Now start connecting (only enabled servers) const enabledClaudeaiConfigs = Object.fromEntries( Object.entries(claudeaiConfigs).filter( ([name]) => !isMcpServerDisabled(name), ), ) getMcpToolsCommandsAndResources( onConnectionAttempt, enabledClaudeaiConfigs, ).catch(error => { logMCPError( 'useManageMcpConnections', `Failed to get claude.ai MCP resources: ${errorMessage(error)}`, ) }) } }
// Log server counts after both phases complete const allConfigs = { ...configs, ...claudeaiConfigs } const counts = { enterprise: 0, global: 0, project: 0, user: 0, plugin: 0, claudeai: 0, } // Ant-only: collect stdio command basenames to correlate with RSS/FPS // metrics. Stdio servers like rust-analyzer can be heavy and we want to // know which ones correlate with poor session performance. const stdioCommands: string[] = [] for (const [name, serverConfig] of Object.entries(allConfigs)) { if (serverConfig.scope === 'enterprise') counts.enterprise++ else if (serverConfig.scope === 'user') counts.global++ else if (serverConfig.scope === 'project') counts.project++ else if (serverConfig.scope === 'local') counts.user++ else if (serverConfig.scope === 'dynamic') counts.plugin++ else if (serverConfig.scope === 'claudeai') counts.claudeai++
if ( process.env.USER_TYPE === 'ant' && !isMcpServerDisabled(name) && (serverConfig.type === undefined || serverConfig.type === 'stdio') && 'command' in serverConfig ) { stdioCommands.push(basename(serverConfig.command)) } } logEvent('tengu_mcp_servers', { ...counts, ...(process.env.USER_TYPE === 'ant' && stdioCommands.length > 0 ? { stdio_commands: stdioCommands .sort() .join( ',', ) as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS, } : {}), }) }
void loadAndConnectMcpConfigs()
return () => { cancelled = true } }, [ isStrictMcpConfig, dynamicMcpConfig, onConnectionAttempt, setAppState, _authVersion, sessionId, _pluginReconnectKey, ])
// Cleanup all timers on unmount useEffect(() => { const timers = reconnectTimersRef.current return () => { for (const timer of timers.values()) { clearTimeout(timer) } timers.clear() // Flush any pending batched MCP updates before unmount if (flushTimerRef.current !== null) { clearTimeout(flushTimerRef.current) flushTimerRef.current = null flushPendingUpdates() } } }, [flushPendingUpdates])
// Expose reconnectMcpServer function for components to use. // Reads mcp.clients via store.getState() so this callback stays stable // across client state transitions (no need to re-create on every connect). const reconnectMcpServer = useCallback( async (serverName: string) => { const client = store .getState() .mcp.clients.find(c => c.name === serverName) if (!client) { throw new Error(`MCP server ${serverName} not found`) }
// Cancel any pending automatic reconnection attempt const existingTimer = reconnectTimersRef.current.get(serverName) if (existingTimer) { clearTimeout(existingTimer) reconnectTimersRef.current.delete(serverName) }
const result = await reconnectMcpServerImpl(serverName, client.config)
onConnectionAttempt(result)
// Don't throw, just let UI handle the client type in case the reconnect failed // (Detailed logs are within the reconnectMcpServerImpl via --debug) return result }, [store, onConnectionAttempt], )
// Expose function to toggle server enabled/disabled state const toggleMcpServer = useCallback( async (serverName: string): Promise<void> => { const client = store .getState() .mcp.clients.find(c => c.name === serverName) if (!client) { throw new Error(`MCP server ${serverName} not found`) }
const isCurrentlyDisabled = client.type === 'disabled'
if (!isCurrentlyDisabled) { // Cancel any pending automatic reconnection attempt const existingTimer = reconnectTimersRef.current.get(serverName) if (existingTimer) { clearTimeout(existingTimer) reconnectTimersRef.current.delete(serverName) }
// Persist disabled state to disk FIRST before clearing cache // This is important because the onclose handler checks disk state setMcpServerEnabled(serverName, false)
// Disabling: disconnect and clean up if currently connected if (client.type === 'connected') { await clearServerCache(serverName, client.config) }
// Update to disabled state (tools/commands/resources auto-cleared) updateServer({ name: serverName, type: 'disabled', config: client.config, }) } else { // Enabling: persist enabled state to disk first setMcpServerEnabled(serverName, true)
// Mark as pending and reconnect updateServer({ name: serverName, type: 'pending', config: client.config, })
// Reconnect the server const result = await reconnectMcpServerImpl(serverName, client.config)
onConnectionAttempt(result) } }, [store, updateServer, onConnectionAttempt], )
return { reconnectMcpServer, toggleMcpServer }}
function getTransportDisplayName(type: string): string { switch (type) { case 'http': return 'HTTP' case 'ws': case 'ws-ide': return 'WebSocket' default: return 'SSE' }}