---
session: ses_2337
updated: 2026-04-27T01:38:43.330Z
---

# Session Summary

## Goal
Implement all Package C — Backend Architecture (Quick Wins) fixes in the Gemini Nexus codebase and verify with `npm run lint`, `npm run type-check`, and `npm test`.

## Constraints & Preferences
- Make minimal, focused changes; do not touch files outside Package C scope
- Do not run `git commit` or `git push`
- Run `npm run lint` and `npm run type-check` after changes and fix any introduced issues
- `npm test` must not break any existing tests (update test expectations if needed to match new behavior)

## Progress
### Done
- [x] **C-P0-1** — `src/ipc/proxy-advanced/handler.ts`: Replaced silent empty fallbacks with explicit errors for `getParityCounters`, `getCircuitBreakerStatus`, `getProxyMetrics`, `getRecentRequests`, `replayRequest`, and `generateIdeConfig`. Added `normalizeServiceError()` helper to map `getServiceOrThrow` errors to `{ success: false, error: 'Proxy advanced service not initialized' }`.
- [x] **C-P0-2** — `src/server/modules/proxy/rate-limit-tracker.ts`: Extended `cleanupExpired()` to iterate `this.failureCounts` and delete stale entries where `entry.lastFailureMs + FAILURE_COUNT_EXPIRY_MS <= now`. Return value now counts both lockouts and failureCounts deletions.
- [x] **C-P0-3** — `src/server/modules/proxy/request-user-agent.ts`: Replaced hardcoded `FALLBACK_VERSION = '1.22.2'` with `import { version } from '../../../../package.json'` and `export const FALLBACK_VERSION = version`. `resolveJsonModule` is already enabled in `tsconfig.json`.
- [x] **C-P1-1** — `src/server/modules/proxy/proxy.controller.ts`: Replaced hardcoded `capabilitiesMap` with `const capabilitiesMap = this.buildCapabilitiesMap()`. Added private `buildCapabilitiesMap()` that iterates `this.tokenManager?.getAllTokens()` and derives capabilities from `quota.models` metadata.
- [x] **C-P1-1 prerequisite** — `src/server/modules/proxy/token-manager.service.ts`: Exported `TokenData` and `TokenEntry` types; added `getAllTokens(): TokenEntry[]` method returning `Array.from(this.tokens.entries())`.
- [x] **C-P1-2** — `src/ipc/proxy-advanced/service-registry.ts`: Added typed `getServiceOrThrow<K extends keyof ProxyAdvancedRegistry>(key: K)` helper. Refactored `handler.ts` to use it; a `normalizeServiceError` wrapper preserves the exact P0 error message.

### In Progress
- [ ] Update `src/tests/unit/ipc/proxy-advanced-handler.test.ts` expectations to match the new error responses (null-registry tests now expect `success: false` and `'Proxy advanced service not initialized'` instead of empty success data or old service-specific messages).
- [ ] Run `npm run type-check` to validate changed backend files.
- [ ] Run `npm run lint` to validate changed backend files.
- [ ] Run `npm test` to ensure no regressions.

### Blocked
- (none)

## Key Decisions
- **Reconciled P0 and P1-2 in handler.ts**: Since `getServiceOrThrow` throws a different message than the P0-required `'Proxy advanced service not initialized'`, added a `normalizeServiceError` helper that detects the "is not registered" substring and rewrites it to the P0 message before returning in the success/error envelope. This allows `getServiceOrThrow` to be used (satisfying P1-2) while preserving the exact P0 contract.
- **Dynamic capabilities heuristic**: `buildCapabilitiesMap()` derives `vision` from `modelInfo.supports_images`, sets `streaming`/`jsonMode` to `false` only for `gemini-3-pro-image` models, and sets `imageGeneration: true` only for `gemini-3-pro` variants that do not include `flash`. Falls back to a default `gemini-3-flash` entry when no models are discovered.

## Next Steps
1. Update `src/tests/unit/ipc/proxy-advanced-handler.test.ts` null-registry tests for `getParityCounters`, `getCircuitBreakerStatus`, `getProxyMetrics`, `getRecentRequests`, `replayRequest`, and `generateIdeConfig` to expect `success: false` and error `'Proxy advanced service not initialized'`.
2. Run `npm run type-check` and fix any TypeScript errors introduced.
3. Run `npm run lint` and fix any lint errors introduced.
4. Run `npm test` and fix any remaining test failures.

## Critical Context
- `proxyAdvancedRegistry` properties (`tokenManager`, `proxyMetrics`, `proxyReplay`, `proxyIdeConfig`) are set to `null` in tests when verifying null-registry behavior; `getServiceOrThrow` will throw, and the catch blocks (via `normalizeServiceError`) will return the unified P0 message.
- `tsconfig.json` already has `"resolveJsonModule": true`, so importing `package.json` version in `request-user-agent.ts` requires no additional config changes.
- `TokenEntry` and `TokenData` are now exported from `token-manager.service.ts` so `getAllTokens()` is usable externally.
- The `proxy.controller.ts` change preserves the existing API response shape (`Record<string, { vision, streaming, jsonMode, audio, imageGeneration }>`) while making the map dynamic.

## File Operations
### Read
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\package.json`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\ipc\proxy-advanced\handler.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\ipc\proxy-advanced\service-registry.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\proxy.controller.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\rate-limit-tracker.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\request-user-agent.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\token-manager.service.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\tests\unit\google-api-timeout.test.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\tests\unit\ipc\proxy-advanced-handler.test.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\tests\unit\rate-limit-tracker.test.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\tests\unit\server\google-api.service.test.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\tests\unit\token-manager-parity-scheduling.test.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\types\cloudAccount.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\tsconfig.json`

### Modified
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\ipc\proxy-advanced\handler.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\ipc\proxy-advanced\service-registry.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\proxy.controller.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\rate-limit-tracker.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\request-user-agent.ts`
- `D:\Documents\Github\Gemini Proxys\Draculabo-AntigravityManager\src\server\modules\proxy\token-manager.service.ts`