docs: sync from documentation@88ab62c6f64aea352e8f40b562e19fa17fd0eb13

docs/authentication.md

@@ -124,7 +124,7 @@ var options = new MarketDataClientOptions { ValidateTokenOnStartup = false };
 ```
 
 > [!NOTE]
-> **Demo mode**
+> **[Demo mode]**
 >
 > If no token is found anywhere in the cascade, the SDK runs in **demo mode** — startup validation is skipped and you can call the free, public endpoints (such as `AAPL` quotes and `client.Utilities.GetStatusAsync()`). Authenticated endpoints throw `AuthenticationException` on first use.
 

docs/options/README.md

@@ -7,6 +7,6 @@ Reach the resource through `client.Options`. For CSV output, call the paired `*C
 ## Options Endpoints
 
 - [Option Chain (C# SDK)](./chain.md) — Retrieve a complete or filtered option chain with the C# SDK. Every contract returns a full quote with greeks, implied volatility and open interest.
-- [Expirations (C# SDK)](./expirations.md)
+- [Expirations (C# SDK)](./expirations.md) — Call GetExpirationsAsync on the C# SDK Options resource to list expiration dates for an underlying symbol, filtered by strike or historical date.
 - [Option Quotes (C# SDK)](./quotes.md)
 - [Lookup (C# SDK)](./lookup.md) — Turn a human-readable option description into a well-formed OCC option symbol with the C# SDK and its OptionsLookupRequest type.

docs/options/chain.md

@@ -23,7 +23,7 @@ Task<OptionsChainResponse> GetChainAsync(OptionsChainRequest request, ...)
 ```
 
 > [!CAUTION]
-> **Quota**
+> **[Quota]**
 >
 > A chain response bills roughly **one credit per contract returned**. An unfiltered chain for a liquid underlying can run to thousands of contracts. Always narrow with an expiration filter, `StrikeLimit`, or `Side` unless you really need the whole chain.
 

docs/settings.md

@@ -95,7 +95,7 @@ await csv.SaveToFileAsync("prices.csv");        // write it to disk
 `CsvResponse` carries the same metadata as every other response (`StatusCode`, `RequestId`, `RateLimit`, `IsNoData`, ...), with `IsCsv == true`.
 
 > [!NOTE]
-> **`MARKETDATA_OUTPUT_FORMAT`**
+> **[`MARKETDATA_OUTPUT_FORMAT`]**
 >
 > This key exists for parity with the other Market Data SDKs and is **advisory only** in C#: it stores a hint on `OutputFormat` but never reroutes a typed method to CSV or vice versa. Call the `*CsvAsync` method when you want CSV.
 

docs/utilities/user.md

@@ -22,7 +22,7 @@ public record User(
 ```
 
 > [!NOTE]
-> **Rate-limit state**
+> **[Rate-limit state]**
 >
 > This endpoint is also what the client calls at startup to validate your token. The rate-limit numbers the SDK tracks — including the reset time and consumed count — come from the `x-api-ratelimit-*` response headers, not from this body, and surface through [`client.LatestRateLimit`](../client.md#rate-limits) and `response.RateLimit`. `User` is the typed view of the account body only.