Preserve native Codex history and add configurable cross-model compression

Separate encrypted reasoning from actual compaction, stop migration after native return, and retain full history and recent exchanges. Add typed settings, Gemini fallback, verified provider windows, bounded summaries and durable concurrent checkpoints.

Validation: 245 bridge tests plus focused concurrency tests; 71 settings/connection tests; 66 supplementary tests; TypeScript checks; renderer and Electron bundles; real primary/native/fallback summary probes and 700K input acceptance.

apps/desktop/electron/compression-settings-types.ts

@@ -0,0 +1,21 @@
+export interface CompressionSettings {
+  schemaVersion: 1
+  primaryModel: string
+  fallbackModel: string
+  currentModelFallback: boolean
+  level: 'mini' | 'az' | 'orta' | 'fazla' | 'cok-fazla'
+  keepTurns: number
+  budgetMode: 'percent' | 'tokens'
+  transferPercent: number
+  maxTokens: number
+  autoEnabled: boolean
+  triggerPercent: number
+  targetPercent: number
+  timeoutSeconds: number
+}
+
+export interface CompressionState {
+  settings: CompressionSettings
+  models: { id: string; name: string; window: number; source: string }[]
+  modelsAvailable: boolean
+}

apps/desktop/electron/compression-settings.test.ts

@@ -0,0 +1,31 @@
+import fs from 'node:fs'
+import os from 'node:os'
+import path from 'node:path'
+
+import { afterEach, expect, it } from 'vitest'
+
+import { createCompressionStore } from './compression-settings'
+
+const dirs: string[] = []
+afterEach(() => { for (const dir of dirs.splice(0)) fs.rmSync(dir, { recursive: true, force: true }) })
+
+it('persists complete settings and survives reopening', () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'compression-store-'))
+  dirs.push(dir)
+  const store = createCompressionStore(dir)
+  const settings = { ...store.get(), keepTurns: 12, primaryModel: 'ide/primary', fallbackModel: 'ide/backup' }
+  store.save(settings)
+  expect(createCompressionStore(dir).get()).toEqual(settings)
+  expect(fs.readdirSync(dir)).toEqual(['compression-settings.json'])
+})
+
+it('rejects invalid thresholds without replacing saved settings', () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'compression-store-'))
+  dirs.push(dir)
+  const store = createCompressionStore(dir)
+  const original = store.save(store.get())
+  for (const patch of [{ keepTurns: 0 }, { targetPercent: 70 }, { maxTokens: NaN }, { autoEnabled: 'yes' }]) {
+    expect(() => store.save({ ...original, ...patch })).toThrow()
+    expect(store.get()).toEqual(original)
+  }
+})

apps/desktop/electron/compression-settings.ts

@@ -0,0 +1,48 @@
+import fs from 'node:fs'
+import path from 'node:path'
+
+import defaults from '../assets/codex-bridge/compression-defaults.json'
+
+import type { CompressionSettings } from './compression-settings-types'
+
+export function validateCompression(value: unknown): CompressionSettings {
+  if (!value || typeof value !== 'object') throw new Error('Invalid compression settings')
+  const v = value as CompressionSettings
+  if (Object.keys(v).sort().join() !== Object.keys(defaults).sort().join()) throw new Error('Invalid settings fields')
+  if (v.schemaVersion !== 1 || !['mini', 'az', 'orta', 'fazla', 'cok-fazla'].includes(v.level) || !['percent', 'tokens'].includes(v.budgetMode)) throw new Error('Invalid compression mode')
+  for (const key of ['primaryModel', 'fallbackModel'] as const) {
+    if (typeof v[key] !== 'string' || v[key].length > 256) throw new Error('Invalid model')
+  }
+  for (const key of ['autoEnabled', 'currentModelFallback'] as const) {
+    if (typeof v[key] !== 'boolean') throw new Error('Invalid option')
+  }
+  const limits: [keyof CompressionSettings, number, number][] = [
+    ['keepTurns', 1, 100], ['transferPercent', 10, 90], ['triggerPercent', 20, 90],
+    ['targetPercent', 10, 80], ['maxTokens', 1024, 2000000], ['timeoutSeconds', 1, 3600]
+  ]
+  for (const [key, low, high] of limits) {
+    const n = v[key]
+    if (typeof n !== 'number' || !Number.isInteger(n) || n < low || n > high) throw new Error(`Invalid ${key}`)
+  }
+  if (v.targetPercent >= v.triggerPercent) throw new Error('Target must be below trigger')
+  return structuredClone(v)
+}
+
+export function createCompressionStore(directory: string) {
+  const file = path.join(directory, 'compression-settings.json')
+  return {
+    get: (): CompressionSettings => validateCompression(fs.existsSync(file) ? JSON.parse(fs.readFileSync(file, 'utf8')) : defaults),
+    save(value: unknown): CompressionSettings {
+      const next = validateCompression(value)
+      fs.mkdirSync(directory, { recursive: true })
+      const tmp = `${file}.${process.pid}.tmp`
+      try {
+        fs.writeFileSync(tmp, JSON.stringify(next, null, 2), { mode: 0o600 })
+        fs.renameSync(tmp, file)
+      } finally {
+        if (fs.existsSync(tmp)) fs.unlinkSync(tmp)
+      }
+      return next
+    }
+  }
+}

apps/desktop/electron/main.ts

@@ -379,6 +379,7 @@ import { createBootstrapCoordinator, sshConfigFingerprint } from './ssh-bootstra
 import { collectSshConfigHosts, parseSshGOutput } from './ssh-config'
 import { createSshProbeConnection, pickLocalPort, redactSecrets, SshConnection } from './ssh-connection'
 import { createStagedTransitionStore } from './staged-transition'
+import { createCompressionStore } from './compression-settings'
 import { createStreamThrottle } from './stream-throttle'
 import { registerTerminalIpc } from './terminal-ipc'
 import { nativeOverlayWidth as computeNativeOverlayWidth, macTitleBarOverlayHeight } from './titlebar-overlay-width'
@@ -17193,6 +17194,7 @@ ipcMain.handle('hermes:quick-entry:settings:set', async (_event, patch) => {
 // resulting state and asks for changes over IPC. Windows only (the login item is
 // a Run-key value). All decisions live in electron/codex-link.ts.
 const AITURK_IDE_DATA_ROOT = path.dirname(HERMES_HOME)
+const compressionStore = createCompressionStore(path.join(AITURK_IDE_DATA_ROOT, 'codex-bridge'))
 const stagedTransition = createStagedTransitionStore(
   path.join(AITURK_IDE_DATA_ROOT, 'codex-bridge'),
   path.join(app.getPath('home'), '.typesafe', 'typesafe.env'),
@@ -17281,6 +17283,30 @@ ipcMain.handle('aiturk:staged-transition:get', async event => {
   return stagedTransitionState()
 })
 
+async function compressionState() {
+  const settings = compressionStore.get()
+  try {
+    const response = await fetch('http://127.0.0.1:8795/aiturk/codex-baglama/status', { signal: AbortSignal.timeout(5000) })
+    if (!response.ok) throw new Error('Bridge unavailable')
+    const body = await response.json()
+    const available = Array.isArray(body.compression_models)
+    return { settings, models: available ? body.compression_models : [], modelsAvailable: available }
+  } catch {
+    return { settings, models: [], modelsAvailable: false }
+  }
+}
+
+ipcMain.handle('aiturk:compression:get', async event => {
+  assertCodexLinkSender(event)
+  return compressionState()
+})
+
+ipcMain.handle('aiturk:compression:set', async (event, settings) => {
+  assertCodexLinkSender(event)
+  compressionStore.save(settings)
+  return compressionState()
+})
+
 ipcMain.handle('aiturk:staged-transition:set', async (event, patch) => {
   assertCodexLinkSender(event)
   stagedTransition.save(patch)

apps/desktop/electron/mobile-live.test.ts

@@ -103,11 +103,12 @@ it.skipIf(!process.env.AITURK_TEST_BACKEND_PORT)(
       ).toBe(200)
       expect((await call(`${route}/resume?profile=default`, 'POST')).status).toBe(200)
       await new Promise<void>((resolve, reject) => {
-        const ws = new WebSocket(`wss://127.0.0.1:${proxyPort}/api/ws?profile=default`, {
+        const tlsOptions: https.RequestOptions = {
           ca: identity.cert,
           checkServerIdentity,
           headers: { Authorization: `Bearer ${deviceToken}` }
-        })
+        }
+        const ws = new WebSocket(`wss://127.0.0.1:${proxyPort}/api/ws?profile=default`, tlsOptions)
         const timer = setTimeout(() => {
           ws.terminate()
           reject(new Error('Chat ping timed out'))

apps/desktop/electron/preload.ts

@@ -295,6 +295,8 @@ contextBridge.exposeInMainWorld('hermesDesktop', {
   ...(process.platform === 'win32'
     ? {
         codexLink: {
+          getCompression: () => ipcRenderer.invoke('aiturk:compression:get'),
+          setCompression: settings => ipcRenderer.invoke('aiturk:compression:set', settings),
           getStagedTransition: () => ipcRenderer.invoke('aiturk:staged-transition:get'),
           setStagedTransition: patch => ipcRenderer.invoke('aiturk:staged-transition:set', patch),
           get: () => ipcRenderer.invoke('aiturk:codex-link:get'),