address pr feedback

reference/functions.md

@@ -1313,7 +1313,7 @@ Introduced in: **Clarity 3**
 The `get-stacks-block-info?` function fetches data for a block of the given *Stacks* block height. The value and type returned are determined by the specified `StacksBlockInfoPropertyName`. If the provided `stacks-block-height` does not correspond to an existing block prior to the current block, the function returns `none`. The currently available property names are as follows:
 
 - `id-header-hash`: This property returns a `(buff 32)` value containing the _index block hash_ of a Stacks block.   This hash is globally unique, and is derived from the block hash and the history of accepted PoX operations.  This is also the block hash value you would pass into `(at-block)`.
-- `header-hash`: This property returns a `(buff 32)` value containing the header hash of a Stacks block, given a Stacks chain height.
+- `header-hash`: This property returns a `(buff 32)` value containing the header hash of a Stacks block, given a Stacks chain height. **WARNING** this hash is not guaranteed to be globally unique, since the same Stacks block can be mined in different PoX forks.  If you need global uniqueness, you should use `id-header-hash`.
 - `time`: This property returns a `uint` value of the block header time field. This is a Unix epoch timestamp in seconds which roughly corresponds to when the block was mined. For a block mined before epoch 3.0, this timestamp comes from the burnchain block. **Note**: this does not increase monotonically with each block and block times are accurate only to within two hours. See [BIP113](https://github.com/bitcoin/bips/blob/master/bip-0113.mediawiki) for more information.
 For a block mined after epoch 3.0, this timestamp comes from the Stacks block header. **Note**: this is the time, according to the miner, when the mining of this block started, but is not guaranteed to be accurate. This time will be validated by the signers to be:
 - Greater than the timestamp of the previous block

reference/keywords.md

@@ -153,10 +153,6 @@ Represents the _none_ option indicating no value for a given optional (analogous
 
 ### **stacks-block-height**
 
-{% hint style="warning" %}
-Will be available after the Nakamoto hard fork
-{% endhint %}
-
 Introduced in: Clarity 3
 
 **output: `uint`**