> ## Documentation Index
> Fetch the complete documentation index at: https://docs.quantdesk.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog: Epics 12–16 — Elena, markets, data plane, X stream

> Shipped quant backtesting (Elena), flex proof, unified market registry with US500/US100 pilots, authoritative data plane, and dedicated X stream service.

# Epics 12–16 shipped (2026-06-26)

Major product slice: backtest → deploy gate → flex publish, unified synthetic perps on V2, and three-service data plane.

## Elena & backtesting (Epic 12)

* **`elena-ai/`** Conductor on port **3006** — proxied via `POST /api/elena/chat`.
* **`/api/v2/backtest/*`** — dataset catalog, Python sim workers, run manifests, deploy gate, DSR, compliance scan.
* Pro **`BT`** window and Lite **`BacktestingTab`** use real job APIs; dedicated Lite **`elena`** tab + Pro **`ELENA`** window for Conductor shell.
* See [Elena & backtesting](../developers/elena-backtesting).

## Social flex v1 (Epic 13)

* **`POST /api/v2/social/flex-cards`** — gate-verified publish linked to `run_id`.
* Leaderboard rows include `flex_card_id`, `run_id`, and server-computed `badges`.
* [Verified flex charter](../social/verified-flex-charter) and [Proof badges](../social/proof-badges).

## Unified markets (Epic 14)

* **Market registry SSOT** — `GET /api/v2/markets`, asset-class browser, leverage tiers.
* **US500-PERP** / **US100-PERP** index pilots on devnet (v1 marks: SPY/QQQ Pyth equity proxies).
* [Perpetual market coverage](../trading/perp-market-coverage).

## Data plane (Epic 15)

* **`data-ingestion/`** (3003), **`news-ingestion/`** (3007), hub tables, `/api/v2/market-stats`, `/api/v2/candles`, `/api/v2/data-health`.
* Production UI paths no longer use random/mock volume for market stats.
* [Data plane overview](../data/overview).

## X stream (Epic 16)

* **`x-stream/`** (3008) — `GET /api/v2/x/feed`, alerts, MIKEY `get_x_context`.
* [X stream and social alerts](../social/x-stream).

## Docs

* Navigation adds **Data**, **Perp market coverage**, **Elena**, and **X stream** pages.
* PRD reconciled: `_bmad-output/planning-artifacts/prds/prd-quantdesk-2026-05-25/prd.md` (updated 2026-06-26).