fix(cliproxy): prevent shared proxy termination on multi-session exit

Add session tracking with reference counting for CLIProxy instances.
Multiple CCS sessions now safely share a single proxy on port 8317.
When any session exits, proxy only terminates if it was the last session.

Changes:
- Add session-tracker.ts: lock file based reference counting
- Modify cliproxy-executor.ts: reuse existing proxy, conditional cleanup
- Add 21 unit tests for session tracker functionality

Fixes #118
This commit is contained in:
kaitranntt
2025-12-17 01:36:34 -05:00
parent 38844540bb
commit 3629e3e2fb
3 changed files with 699 additions and 78 deletions
+143 -78
View File
@@ -45,6 +45,13 @@ import {
installWebSearchHook,
displayWebSearchStatus,
} from '../utils/websearch-manager';
import {
getExistingProxy,
registerSession,
unregisterSession,
hasActiveSessions,
cleanupOrphanedSessions,
} from './session-tracker';
/** Default executor configuration */
const DEFAULT_CONFIG: ExecutorConfig = {
@@ -303,85 +310,116 @@ export async function execClaudeWithCLIProxy(
const configPath = generateConfig(provider, cfg.port);
log(`Config written: ${configPath}`);
// 6a. Pre-flight check: ensure port is free (auto-kill zombie CLIProxy)
const portProcess = await getPortProcess(cfg.port);
if (portProcess) {
if (isCLIProxyProcess(portProcess)) {
// Zombie CLIProxy from previous run - auto-kill it
log(`Found zombie CLIProxy on port ${cfg.port} (PID ${portProcess.pid}), killing...`);
const killed = killProcessOnPort(cfg.port, verbose);
if (killed) {
console.log(info(`Cleaned up zombie CLIProxy process`));
// Wait a bit for port to be released
await new Promise((r) => setTimeout(r, 500));
// 6a. Pre-flight check: handle existing proxy or port conflicts
// Clean up orphaned sessions first (from crashed proxies)
cleanupOrphanedSessions(cfg.port);
// Check if there's an existing healthy proxy we can reuse
const existingProxy = getExistingProxy(cfg.port);
let proxy: ChildProcess | null = null;
let sessionId: string;
let isReusingProxy = false;
if (existingProxy) {
// Reuse existing proxy - another CCS session started it
log(`Reusing existing CLIProxy on port ${cfg.port} (PID ${existingProxy.pid})`);
sessionId = registerSession(cfg.port, existingProxy.pid);
isReusingProxy = true;
console.log(
info(`Joined existing CLIProxy (${existingProxy.sessions.length + 1} sessions active)`)
);
} else {
// No existing proxy - check if port is free
const portProcess = await getPortProcess(cfg.port);
if (portProcess) {
if (isCLIProxyProcess(portProcess)) {
// CLIProxy on port but no session lock - likely orphaned/zombie
// Only kill if no active sessions registered
if (!hasActiveSessions()) {
log(`Found zombie CLIProxy on port ${cfg.port} (PID ${portProcess.pid}), killing...`);
const killed = killProcessOnPort(cfg.port, verbose);
if (killed) {
console.log(info(`Cleaned up zombie CLIProxy process`));
// Wait a bit for port to be released
await new Promise((r) => setTimeout(r, 500));
}
} else {
// Active sessions exist but getExistingProxy returned null - something's wrong
// Try to connect anyway
log(`CLIProxy on port ${cfg.port} has active sessions, attempting to join...`);
}
} else {
// Non-CLIProxy process blocking the port - warn user
console.error('');
console.error(
warn(`Port ${cfg.port} is blocked by ${portProcess.processName} (PID ${portProcess.pid})`)
);
console.error('');
console.error('To fix this, close the blocking application or run:');
console.error(` ${getPortCheckCommand(cfg.port)}`);
console.error('');
throw new Error(`Port ${cfg.port} is in use by another application`);
}
} else {
// Non-CLIProxy process blocking the port - warn user
console.error('');
console.error(
warn(`Port ${cfg.port} is blocked by ${portProcess.processName} (PID ${portProcess.pid})`)
);
console.error('');
console.error('To fix this, close the blocking application or run:');
console.error(` ${getPortCheckCommand(cfg.port)}`);
console.error('');
throw new Error(`Port ${cfg.port} is in use by another application`);
}
}
// 6b. Spawn CLIProxyAPI binary
const proxyArgs = ['--config', configPath];
// 6b. Spawn CLIProxyAPI binary (only if not reusing existing proxy)
const proxyArgs = ['--config', configPath];
log(`Spawning: ${binaryPath} ${proxyArgs.join(' ')}`);
log(`Spawning: ${binaryPath} ${proxyArgs.join(' ')}`);
const proxy = spawn(binaryPath, proxyArgs, {
stdio: ['ignore', verbose ? 'pipe' : 'ignore', verbose ? 'pipe' : 'ignore'],
detached: false,
});
// Forward proxy output in verbose mode
if (verbose) {
proxy.stdout?.on('data', (data: Buffer) => {
process.stderr.write(`[cliproxy-out] ${data.toString()}`);
proxy = spawn(binaryPath, proxyArgs, {
stdio: ['ignore', verbose ? 'pipe' : 'ignore', verbose ? 'pipe' : 'ignore'],
detached: false,
});
proxy.stderr?.on('data', (data: Buffer) => {
process.stderr.write(`[cliproxy-err] ${data.toString()}`);
// Forward proxy output in verbose mode
if (verbose) {
proxy.stdout?.on('data', (data: Buffer) => {
process.stderr.write(`[cliproxy-out] ${data.toString()}`);
});
proxy.stderr?.on('data', (data: Buffer) => {
process.stderr.write(`[cliproxy-err] ${data.toString()}`);
});
}
// Handle proxy errors
proxy.on('error', (error) => {
console.error(fail(`CLIProxy spawn error: ${error.message}`));
});
}
// Handle proxy errors
proxy.on('error', (error) => {
console.error(fail(`CLIProxy spawn error: ${error.message}`));
});
// 7. Wait for proxy readiness via TCP polling
const readySpinner = new ProgressIndicator(`Waiting for CLIProxy on port ${cfg.port}`);
readySpinner.start();
// 7. Wait for proxy readiness via TCP polling
const readySpinner = new ProgressIndicator(`Waiting for CLIProxy on port ${cfg.port}`);
readySpinner.start();
try {
await waitForProxyReady(cfg.port, cfg.timeout, cfg.pollInterval);
readySpinner.succeed(`CLIProxy ready on port ${cfg.port}`);
} catch (error) {
readySpinner.fail('CLIProxy startup failed');
proxy.kill('SIGTERM');
try {
await waitForProxyReady(cfg.port, cfg.timeout, cfg.pollInterval);
readySpinner.succeed(`CLIProxy ready on port ${cfg.port}`);
} catch (error) {
readySpinner.fail('CLIProxy startup failed');
proxy.kill('SIGTERM');
const err = error as Error;
console.error('');
console.error(fail('CLIProxy failed to start'));
console.error('');
console.error('Possible causes:');
console.error(` 1. Port ${cfg.port} already in use`);
console.error(' 2. Binary crashed on startup');
console.error(' 3. Invalid configuration');
console.error('');
console.error('Troubleshooting:');
console.error(` - Check port: ${getPortCheckCommand(cfg.port)}`);
console.error(' - Run with --verbose for detailed logs');
console.error(` - View config: ${getCatCommand(configPath)}`);
console.error(' - Try: ccs doctor --fix');
console.error('');
const err = error as Error;
console.error('');
console.error(fail('CLIProxy failed to start'));
console.error('');
console.error('Possible causes:');
console.error(` 1. Port ${cfg.port} already in use`);
console.error(' 2. Binary crashed on startup');
console.error(' 3. Invalid configuration');
console.error('');
console.error('Troubleshooting:');
console.error(` - Check port: ${getPortCheckCommand(cfg.port)}`);
console.error(' - Run with --verbose for detailed logs');
console.error(` - View config: ${getCatCommand(configPath)}`);
console.error(' - Try: ccs doctor --fix');
console.error('');
throw new Error(`CLIProxy startup failed: ${err.message}`);
}
throw new Error(`CLIProxy startup failed: ${err.message}`);
// Register this session with the new proxy
sessionId = registerSession(cfg.port, proxy.pid as number);
log(`Registered session ${sessionId} with new proxy (PID ${proxy.pid})`);
}
// 7. Execute Claude CLI with proxied environment
@@ -435,10 +473,25 @@ export async function execClaudeWithCLIProxy(
});
}
// 8. Cleanup: kill proxy when Claude exits
// 8. Cleanup: unregister session when Claude exits, kill proxy only if last session
claude.on('exit', (code, signal) => {
log(`Claude exited: code=${code}, signal=${signal}`);
proxy.kill('SIGTERM');
// Unregister this session - returns true if we were the last session
const shouldKillProxy = unregisterSession(sessionId);
log(`Session ${sessionId} unregistered, shouldKillProxy=${shouldKillProxy}`);
if (shouldKillProxy && proxy) {
// We were the last session and we own the proxy - kill it
log('Last session, killing proxy');
proxy.kill('SIGTERM');
} else if (shouldKillProxy && isReusingProxy) {
// We were the last session but don't own the proxy process
// The proxy will be cleaned up as zombie on next session start
log('Last session but reusing proxy, proxy will be cleaned up later');
} else {
log(`Other sessions still active, keeping proxy running`);
}
if (signal) {
process.kill(process.pid, signal as NodeJS.Signals);
@@ -449,27 +502,39 @@ export async function execClaudeWithCLIProxy(
claude.on('error', (error) => {
console.error(fail(`Claude CLI error: ${error}`));
proxy.kill('SIGTERM');
// Unregister and conditionally kill proxy
const shouldKillProxy = unregisterSession(sessionId);
if (shouldKillProxy && proxy) {
proxy.kill('SIGTERM');
}
process.exit(1);
});
// Handle parent process termination (SIGTERM, SIGINT)
const cleanup = () => {
log('Parent signal received, cleaning up');
proxy.kill('SIGTERM');
// Unregister and conditionally kill proxy
const shouldKillProxy = unregisterSession(sessionId);
if (shouldKillProxy && proxy) {
proxy.kill('SIGTERM');
}
claude.kill('SIGTERM');
};
process.once('SIGTERM', cleanup);
process.once('SIGINT', cleanup);
// Handle proxy crash
proxy.on('exit', (code, signal) => {
if (code !== 0 && code !== null) {
log(`Proxy exited unexpectedly: code=${code}, signal=${signal}`);
// Don't kill Claude - it may have already exited
}
});
// Handle proxy crash (only if we own the proxy)
if (proxy) {
proxy.on('exit', (code, signal) => {
if (code !== 0 && code !== null) {
log(`Proxy exited unexpectedly: code=${code}, signal=${signal}`);
// Don't kill Claude - it may have already exited
}
});
}
}
/**
+226
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@@ -0,0 +1,226 @@
/**
* Session Tracker for CLIProxy Multi-Instance Support
*
* Manages reference counting for shared CLIProxy instances.
* Multiple CCS sessions can share a single proxy on the same port.
* Proxy only terminates when ALL sessions exit (count reaches 0).
*
* Lock file format: ~/.ccs/cliproxy/sessions.json
* {
* "port": 8317,
* "pid": 12345, // CLIProxy process PID
* "sessions": ["abc123", "def456"], // Active session IDs
* "startedAt": "2024-01-01T00:00:00Z"
* }
*/
import * as fs from 'fs';
import * as path from 'path';
import * as crypto from 'crypto';
import { getCliproxyDir } from './config-generator';
/** Session lock file structure */
interface SessionLock {
port: number;
pid: number;
sessions: string[];
startedAt: string;
}
/** Generate unique session ID */
function generateSessionId(): string {
return crypto.randomBytes(8).toString('hex');
}
/** Get path to session lock file */
function getSessionLockPath(): string {
return path.join(getCliproxyDir(), 'sessions.json');
}
/** Read session lock file (returns null if not exists or invalid) */
function readSessionLock(): SessionLock | null {
const lockPath = getSessionLockPath();
try {
if (!fs.existsSync(lockPath)) {
return null;
}
const content = fs.readFileSync(lockPath, 'utf-8');
const lock = JSON.parse(content) as SessionLock;
// Validate structure
if (
typeof lock.port !== 'number' ||
typeof lock.pid !== 'number' ||
!Array.isArray(lock.sessions)
) {
return null;
}
return lock;
} catch {
return null;
}
}
/** Write session lock file */
function writeSessionLock(lock: SessionLock): void {
const lockPath = getSessionLockPath();
const dir = path.dirname(lockPath);
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir, { recursive: true, mode: 0o700 });
}
fs.writeFileSync(lockPath, JSON.stringify(lock, null, 2), { mode: 0o600 });
}
/** Delete session lock file */
function deleteSessionLock(): void {
const lockPath = getSessionLockPath();
try {
if (fs.existsSync(lockPath)) {
fs.unlinkSync(lockPath);
}
} catch {
// Ignore errors on cleanup
}
}
/** Check if a PID is still running */
function isProcessRunning(pid: number): boolean {
try {
// Sending signal 0 checks if process exists without killing it
process.kill(pid, 0);
return true;
} catch {
return false;
}
}
/**
* Check if there's an existing proxy running that we can reuse.
* Returns the existing lock if proxy is healthy, null otherwise.
*/
export function getExistingProxy(port: number): SessionLock | null {
const lock = readSessionLock();
if (!lock) {
return null;
}
// Verify port matches
if (lock.port !== port) {
return null;
}
// Verify proxy process is still running
if (!isProcessRunning(lock.pid)) {
// Proxy crashed - clean up stale lock
deleteSessionLock();
return null;
}
return lock;
}
/**
* Register a new session with the proxy.
* Call this when starting a new CCS session that will use an existing proxy.
* @returns Session ID for this session
*/
export function registerSession(port: number, proxyPid: number): string {
const sessionId = generateSessionId();
const existingLock = readSessionLock();
if (existingLock && existingLock.port === port && existingLock.pid === proxyPid) {
// Add to existing sessions
existingLock.sessions.push(sessionId);
writeSessionLock(existingLock);
} else {
// Create new lock (first session for this proxy)
const newLock: SessionLock = {
port,
pid: proxyPid,
sessions: [sessionId],
startedAt: new Date().toISOString(),
};
writeSessionLock(newLock);
}
return sessionId;
}
/**
* Unregister a session from the proxy.
* @returns true if this was the last session (proxy should be killed)
*/
export function unregisterSession(sessionId: string): boolean {
const lock = readSessionLock();
if (!lock) {
// No lock file - assume we're the only session
return true;
}
// Remove this session from the list
const index = lock.sessions.indexOf(sessionId);
if (index !== -1) {
lock.sessions.splice(index, 1);
}
// Check if any sessions remain
if (lock.sessions.length === 0) {
// Last session - clean up lock file
deleteSessionLock();
return true;
}
// Other sessions still active - keep proxy running
writeSessionLock(lock);
return false;
}
/**
* Get current session count for the proxy.
*/
export function getSessionCount(): number {
const lock = readSessionLock();
if (!lock) {
return 0;
}
return lock.sessions.length;
}
/**
* Check if proxy has any active sessions.
* Used to determine if a "zombie" proxy should be killed.
*/
export function hasActiveSessions(): boolean {
const lock = readSessionLock();
if (!lock) {
return false;
}
// Verify proxy is still running
if (!isProcessRunning(lock.pid)) {
deleteSessionLock();
return false;
}
return lock.sessions.length > 0;
}
/**
* Clean up orphaned sessions (when proxy crashes).
* Called on startup to ensure clean state.
*/
export function cleanupOrphanedSessions(port: number): void {
const lock = readSessionLock();
if (!lock) {
return;
}
// If port doesn't match, this lock is for a different proxy
if (lock.port !== port) {
return;
}
// If proxy is dead, clean up lock
if (!isProcessRunning(lock.pid)) {
deleteSessionLock();
}
}
+330
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@@ -0,0 +1,330 @@
/**
* Session Tracker Tests
*
* Tests for multi-instance CLIProxy session management.
* Verifies reference counting and cleanup behavior.
*/
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const os = require('os');
// Set test isolation environment before importing
const testHome = path.join(os.tmpdir(), `ccs-test-${Date.now()}-${Math.random().toString(36).slice(2)}`);
process.env.CCS_HOME = testHome;
const {
getExistingProxy,
registerSession,
unregisterSession,
getSessionCount,
hasActiveSessions,
cleanupOrphanedSessions,
} = require('../../../dist/cliproxy/session-tracker');
describe('Session Tracker', function () {
const testPort = 18317;
let sessionLockPath;
beforeEach(function () {
// Create test directories
const cliproxyDir = path.join(testHome, '.ccs', 'cliproxy');
fs.mkdirSync(cliproxyDir, { recursive: true });
sessionLockPath = path.join(cliproxyDir, 'sessions.json');
// Clean up any existing lock file
if (fs.existsSync(sessionLockPath)) {
fs.unlinkSync(sessionLockPath);
}
});
afterEach(function () {
// Clean up lock file
if (fs.existsSync(sessionLockPath)) {
fs.unlinkSync(sessionLockPath);
}
});
afterAll(function () {
// Clean up test directory
try {
fs.rmSync(testHome, { recursive: true, force: true });
} catch {
// Ignore cleanup errors
}
delete process.env.CCS_HOME;
});
describe('getExistingProxy', function () {
it('should return null when no lock file exists', function () {
const result = getExistingProxy(testPort);
assert.strictEqual(result, null);
});
it('should return null when port does not match', function () {
// Create lock with different port
const lock = {
port: 9999,
pid: process.pid, // Use current process as it's definitely running
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
const result = getExistingProxy(testPort);
assert.strictEqual(result, null);
});
it('should return lock when proxy is healthy', function () {
// Create lock with current process (guaranteed to be running)
const lock = {
port: testPort,
pid: process.pid,
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
const result = getExistingProxy(testPort);
assert.notStrictEqual(result, null);
assert.strictEqual(result.port, testPort);
assert.strictEqual(result.pid, process.pid);
assert.deepStrictEqual(result.sessions, ['session1']);
});
it('should return null and cleanup when proxy is dead', function () {
// Create lock with non-existent PID
const lock = {
port: testPort,
pid: 999999999, // Very unlikely to exist
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
const result = getExistingProxy(testPort);
assert.strictEqual(result, null);
// Lock file should be cleaned up
assert.strictEqual(fs.existsSync(sessionLockPath), false);
});
});
describe('registerSession', function () {
it('should create new lock file for first session', function () {
const sessionId = registerSession(testPort, process.pid);
assert.ok(sessionId, 'should return session ID');
assert.ok(fs.existsSync(sessionLockPath), 'should create lock file');
const lock = JSON.parse(fs.readFileSync(sessionLockPath, 'utf-8'));
assert.strictEqual(lock.port, testPort);
assert.strictEqual(lock.pid, process.pid);
assert.strictEqual(lock.sessions.length, 1);
assert.strictEqual(lock.sessions[0], sessionId);
});
it('should add session to existing lock', function () {
// Register first session
const session1 = registerSession(testPort, process.pid);
// Register second session
const session2 = registerSession(testPort, process.pid);
assert.notStrictEqual(session1, session2, 'should generate unique IDs');
const lock = JSON.parse(fs.readFileSync(sessionLockPath, 'utf-8'));
assert.strictEqual(lock.sessions.length, 2);
assert.ok(lock.sessions.includes(session1));
assert.ok(lock.sessions.includes(session2));
});
it('should create new lock if PID differs', function () {
// Create lock with different PID
const oldLock = {
port: testPort,
pid: 12345,
sessions: ['old-session'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(oldLock));
// Register with new PID
const sessionId = registerSession(testPort, process.pid);
const lock = JSON.parse(fs.readFileSync(sessionLockPath, 'utf-8'));
assert.strictEqual(lock.pid, process.pid);
assert.strictEqual(lock.sessions.length, 1);
assert.strictEqual(lock.sessions[0], sessionId);
});
});
describe('unregisterSession', function () {
it('should return true when no lock exists', function () {
const result = unregisterSession('nonexistent');
assert.strictEqual(result, true);
});
it('should remove session and return false when others remain', function () {
// Register two sessions
const session1 = registerSession(testPort, process.pid);
const session2 = registerSession(testPort, process.pid);
// Unregister first
const shouldKill = unregisterSession(session1);
assert.strictEqual(shouldKill, false, 'should not kill - other sessions active');
const lock = JSON.parse(fs.readFileSync(sessionLockPath, 'utf-8'));
assert.strictEqual(lock.sessions.length, 1);
assert.strictEqual(lock.sessions[0], session2);
});
it('should return true and delete lock when last session', function () {
// Register single session
const session1 = registerSession(testPort, process.pid);
// Unregister it
const shouldKill = unregisterSession(session1);
assert.strictEqual(shouldKill, true, 'should kill - last session');
assert.strictEqual(fs.existsSync(sessionLockPath), false, 'should delete lock file');
});
it('should handle unregistering non-existent session gracefully', function () {
// Register a session
registerSession(testPort, process.pid);
// Try to unregister wrong session
const shouldKill = unregisterSession('wrong-session-id');
// Should return false since a session still exists
assert.strictEqual(shouldKill, false);
});
});
describe('getSessionCount', function () {
it('should return 0 when no lock exists', function () {
assert.strictEqual(getSessionCount(), 0);
});
it('should return correct count', function () {
registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 1);
registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 2);
registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 3);
});
});
describe('hasActiveSessions', function () {
it('should return false when no lock exists', function () {
assert.strictEqual(hasActiveSessions(), false);
});
it('should return true when sessions exist and proxy running', function () {
registerSession(testPort, process.pid);
assert.strictEqual(hasActiveSessions(), true);
});
it('should return false and cleanup when proxy is dead', function () {
// Create lock with dead PID
const lock = {
port: testPort,
pid: 999999999,
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
assert.strictEqual(hasActiveSessions(), false);
assert.strictEqual(fs.existsSync(sessionLockPath), false);
});
});
describe('cleanupOrphanedSessions', function () {
it('should do nothing when no lock exists', function () {
cleanupOrphanedSessions(testPort);
// Should not throw
});
it('should not cleanup when port differs', function () {
const lock = {
port: 9999,
pid: 999999999, // Dead PID
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
cleanupOrphanedSessions(testPort);
// Should still exist (different port)
assert.strictEqual(fs.existsSync(sessionLockPath), true);
});
it('should cleanup when proxy is dead', function () {
const lock = {
port: testPort,
pid: 999999999, // Dead PID
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
cleanupOrphanedSessions(testPort);
assert.strictEqual(fs.existsSync(sessionLockPath), false);
});
it('should not cleanup when proxy is alive', function () {
const lock = {
port: testPort,
pid: process.pid, // Current process - alive
sessions: ['session1'],
startedAt: new Date().toISOString(),
};
fs.writeFileSync(sessionLockPath, JSON.stringify(lock));
cleanupOrphanedSessions(testPort);
assert.strictEqual(fs.existsSync(sessionLockPath), true);
});
});
describe('Multi-session scenario', function () {
it('should handle complete multi-terminal workflow', function () {
// Terminal 1 starts - first session
const session1 = registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 1);
// Terminal 2 starts - joins existing
const session2 = registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 2);
// Terminal 3 starts - joins existing
const session3 = registerSession(testPort, process.pid);
assert.strictEqual(getSessionCount(), 3);
// Terminal 1 exits - should NOT kill proxy
let shouldKill = unregisterSession(session1);
assert.strictEqual(shouldKill, false);
assert.strictEqual(getSessionCount(), 2);
// Terminal 3 exits - should NOT kill proxy
shouldKill = unregisterSession(session3);
assert.strictEqual(shouldKill, false);
assert.strictEqual(getSessionCount(), 1);
// Terminal 2 exits - SHOULD kill proxy (last session)
shouldKill = unregisterSession(session2);
assert.strictEqual(shouldKill, true);
assert.strictEqual(getSessionCount(), 0);
assert.strictEqual(fs.existsSync(sessionLockPath), false);
});
});
});