# OpenSpec Change: enterprise-server-cache-redis

- **Change ID**: enterprise-server-cache-redis
- **Package**: `@suaveplan/cache-redis`
- **Category**: server/data
- **Target path**: `server/data/cache-redis`
- **Status**: PROPOSED
- **Date**: 2026-04-24
- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/cache-redis.md`

---

## Summary

Deliver `@suaveplan/cache-redis` on the genesis branch from scratch at enterprise quality. The package provides a Redis-backed cache adapter implementing the `StorageLike` / `CacheLike` interface. It wraps `ioredis` with typed get/set/delete/has/list/clear/ttl operations, namespace prefixing, Zod-validated connection options, circuit-breaker via `@suaveplan/retry`, OTel instrumentation, and structured logging. Supports both single-node and cluster modes via a single `createRedisCacheAdapter` factory.

---

## Current-state audit (genesis)

The package does not exist on genesis yet — fresh build. No prior source, no test results, no coverage data.

---

## Available workspace deps on genesis

| Package | Role |
|---|---|
| `@suaveplan/error` (`workspace:^`) | Typed error codes for `CACHE_REDIS.*` |
| `@suaveplan/types` (`workspace:^`) | `StorageLike`, `LoggerLike` |
| `@suaveplan/retry` (`workspace:^`) | Circuit breaker + backoff on connection loss |
| `@suaveplan/logger` (`workspace:^`) | Structured logs |
| `zod` (`catalog:forms`) | Options validation |
| `@opentelemetry/api` (`catalog:observability`) | Spans + counters |
| `ioredis` (`catalog:data`) | Redis client |
| `tslib` (`catalog:build`) | Runtime helpers |

---

## Public API surface

### Adapter

```ts
class RedisCacheAdapter {
  constructor(options: RedisCacheOptions)
  get(key: string): Promise<Uint8Array | undefined>
  set(key: string, value: Uint8Array, ttlMs?: number): Promise<void>
  delete(key: string): Promise<boolean>
  has(key: string): Promise<boolean>
  list(prefix?: string): Promise<string[]>
  clear(): Promise<void>
  ttl(key: string): Promise<number | undefined>   // remaining TTL in ms
  connect(): Promise<void>
  disconnect(): Promise<void>
  ping(): Promise<boolean>
}

function createRedisCacheAdapter(options: RedisCacheOptions): RedisCacheAdapter
```

### Options

```ts
interface RedisCacheOptions {
  host?: string          // default: 'localhost'
  port?: number          // default: 6379
  password?: string
  db?: number
  namespace?: string     // key prefix, default: ''
  tls?: boolean
  clusterNodes?: Array<{ host: string; port: number }>
  maxRetries?: number    // default: 3
  connectTimeout?: number // default: 5000 ms
  commandTimeout?: number // default: 2000 ms
  logger?: LoggerLike
}

const RedisCacheOptionsSchema: z.ZodSchema<RedisCacheOptions>
```

### Error codes

```ts
type RedisCacheErrorCode =
  | 'CACHE_REDIS_CONNECT_FAILED'
  | 'CACHE_REDIS_COMMAND_FAILED'
  | 'CACHE_REDIS_TIMEOUT'
  | 'CACHE_REDIS_CLUSTER_ERROR'
  | 'CACHE_REDIS_INVALID_KEY'

function registerRedisCacheErrorCodes(): void
```

---

## File layout

```text
server/data/cache-redis/
  package.json
  tsconfig.json
  vitest.config.ts
  src/
    index.ts
    error-codes.ts
    constants/
      index.ts
    types/
      cache-redis.types.ts
      cache-redis.types.md
    adapter/
      redis-cache-adapter/
        redis-cache-adapter.ts
        redis-cache-adapter.md
        redis-cache-adapter.types.ts
        redis-cache-adapter.test.ts
        index.ts
    utils/
      key-builder.ts
      key-builder.md
      key-builder.test.ts
  tests/
    integration.test.ts   # real Redis via docker
```

---

## Impact

Downstream consumers: any server package needing distributed caching (api-gateway, rate-limiter, idempotency, sessions). No genesis package currently depends on it.

**Prerequisites on Verdaccio**: `@suaveplan/error`, `@suaveplan/types`, `@suaveplan/retry`, `@suaveplan/logger`.
**Integration tests** require a live Redis instance — use `docker run redis:7-alpine` in CI.