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CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+---
+
+## [Unreleased]
+
+### Added
+- Full pytest coverage for `TiingoProvider` — 30 tests covering `supports()`, `fetch()` (daily/weekly, adj fields, limit, auth header), and `_download()` error paths
+- Full pytest coverage for `FinnhubProvider` — 33 tests covering stock/forex routing, `_to_forex_symbol()`, `_parse()`, and all error cases
+
+---
+
+## [0.1.0] — 2026-03-06
+
+### Added
+- `KrakenProvider` — public REST API for crypto OHLCV, no key required; BTC→XBT symbol mapping; all standard intervals
+- `CoinGeckoProvider` — crypto OHLCV with no API key; 4h and 1d granularity via auto-detection
+
+### Fixed
+- Logging added to registry fallback chain — silent `None` returns now emit `debug`/`warning` diagnostics
+
+---
+
+## [0.0.5] — 2026-03-03
+
+### Added
+- CLI tool: `ohlcv fetch SYMBOL INTERVAL LIMIT [--provider] [--csv]` via click
+- `examples/basic_fetch.py` and `examples/multi_provider.py`
+- GitHub Actions CI — pytest + ruff on Python 3.11 and 3.12
+
+### Fixed
+- Session reuse in `BinanceProvider` — single `aiohttp.ClientSession` per instance
+- Close session on CLI exit via `registry.teardown()`
+- Move `click` to core dependencies (was optional, broke CLI install)
+
+---
+
+## [0.0.4] — 2026-02-25
+
+### Added
+- `FinnhubProvider` — US stock candles and forex quotes via OANDA format
+- `TiingoProvider` — daily and weekly bars for stocks and ETFs; requires `TIINGO_API_KEY`
+- Tiingo and Finnhub wired into `registry.pick()` routing chains
+
+### Fixed
+- `build-backend` value in `pyproject.toml` (`setuptools.build_meta`)
+- Replace `respx` with `aioresponses` in dev dependencies
+
+---
+
+## [0.0.3] — 2026-02-23
+
+### Added
+- `YFinanceProvider` — stocks, forex, and crypto via yfinance
+- `py.typed` marker for typed package consumers
+
+---
+
+## [0.0.2] — 2026-02-22
+
+### Added
+- `BinanceProvider` — crypto OHLCV via Binance klines endpoint
+- `OHLCVProvider` abstract base class and `Candle` model
+- Provider registry with asset-class-based routing
+
+---
+
+## [0.0.1] — 2026-02-22
+
+### Added
+- Initial project scaffold — `pyproject.toml`, package structure, README