diff --git a/RELEASES.md b/RELEASES.md
index 77b6e706..2a8a5130 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -27,6 +27,15 @@ Compiler
- Changes that have not yet been merged will remove debug values for the
classification system.
+Core
+----
+- Remove `core/aggregate`.
+ - This package is not currently utilized and is dangerous---it could
+ easily aggregate unintended values if used carelessly. Those who know
+ what they are doing can use `sym-set` if such a thing is a good thing
+ within the given context, and proper precautions are taken (as many
+ templates already do today).
+
v17.9.0 (2021-05-27)
====================
diff --git a/core/aggregate.xml b/core/aggregate.xml
deleted file mode 100644
index f59db3e4..00000000
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+++ /dev/null
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- Aggregate templates simplify aggregating values through various means.
- Unless otherwise specified,
- the default means of aggregation is summation.
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- For large numbers of values,
- the most convenient way to aggregate is by matching on symbol names.
- Note that symbols must be available for a match to occur.
- All imported symbols are immediately available,
- but \tt{expand-sequence} may need to be used for symbols produced by
- the same package.
-
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- \ref{_aggregate-rate-each_} aggregates values of generators (usually
- referred to by \tt{rate-each}) through summation.
- A \tt{rate-each} block is generated to perform the summation.
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- Since \tt{rate-each} multiplies its body by \tt{_CMATCH_},
- zero symbols would normally result in the summation of \tt{_CMATCH_}
- itself, which is not desirable;
- this template always includes \ref{ZERO} in the body to defend
- against this,
- causing a yield of~$0.00$ if there are no symbol matches.
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- \ref{_aggregate-rate_} is analgous to \ref{_aggregate-rate-each_},
- handling only scalar~\tt{@yields@}.
- A \tt{rate} block is generated to aggregate by summation.
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- To prevent an empty rate block from being generated if there are no
- symbol matches,
- \ref{ZERO} is always included as part of the summation.
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- \ref{_aggregate-classify_} aggregates classifications.
- Keep in mind that classifications act as universal quantifiers by default,
- meaning zero symbol matches will produce a match and a scalar~$1$;
- existential quantifiers (\tt{@any@} set to \tt{true}) will \emph{not}
- match and will produce the scalar~$0$.
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diff --git a/core/test/core/aggregate.xml b/core/test/core/aggregate.xml
deleted file mode 100644
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diff --git a/core/test/core/suite.xml b/core/test/core/suite.xml
index 32aee5bf..2bc26b75 100644
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@@ -38,7 +38,6 @@
-