diff --git a/.github/workflows/comments.yml b/.github/workflows/comments.yml
index 36a9235903..7cf4149413 100644
--- a/.github/workflows/comments.yml
+++ b/.github/workflows/comments.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4.1"
+          ruby-version: "3.4.5"
           bundler: none
       - name: Install dependencies
         run: |
diff --git a/Gemfile.lock b/Gemfile.lock
index 5e4e056895..6bc74e689a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,19 +31,20 @@ GEM
       public_suffix (>= 2.0.2, < 7.0)
     ast (2.4.3)
     base64 (0.3.0)
-    benchmark (0.4.0)
+    benchmark (0.4.1)
     benchmark-ips (2.14.0)
     bigdecimal (3.2.2)
     concurrent-ruby (1.3.5)
     connection_pool (2.5.3)
-    csv (3.3.4)
+    csv (3.3.5)
     dbm (1.1.0)
     diff-lcs (1.6.2)
     digest (3.2.0)
     drb (2.2.3)
-    erb (5.0.1)
+    erb (5.0.2)
     extconf_compile_commands_json (0.0.7)
     ffi (1.17.2)
+    ffi (1.17.2-arm64-darwin)
     ffi (1.17.2-x86_64-linux-gnu)
     fileutils (1.7.3)
     goodcheck (3.1.0)
@@ -54,7 +55,7 @@ GEM
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
     json (2.12.2)
-    json-schema (5.1.1)
+    json-schema (5.2.1)
       addressable (~> 2.8)
       bigdecimal (~> 3.1)
     language_server-protocol (3.17.0.5)
@@ -72,9 +73,11 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nkf (0.2.0)
+    nokogiri (1.18.8-arm64-darwin)
+      racc (~> 1.4)
     nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
-    ostruct (0.6.1)
+    ostruct (0.6.2)
     parallel (1.27.0)
     parser (3.3.8.0)
       ast (~> 2.4.1)
@@ -97,7 +100,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (6.14.0)
+    rdoc (6.14.2)
       erb
       psych (>= 4.0.0)
     regexp_parser (2.10.0)
@@ -105,7 +108,7 @@ GEM
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
       rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.4)
+    rspec-core (3.13.5)
       rspec-support (~> 3.13.0)
     rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
@@ -114,7 +117,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.4)
-    rubocop (1.75.8)
+    rubocop (1.78.0)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -122,10 +125,10 @@ GEM
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
+      rubocop-ast (>= 1.45.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.44.1)
+    rubocop-ast (1.46.0)
       parser (>= 3.3.7.2)
       prism (~> 1.4)
     rubocop-on-rbs (1.8.0)
@@ -164,7 +167,7 @@ GEM
     tempfile (0.3.1)
     terminal-table (4.0.0)
       unicode-display_width (>= 1.1.1, < 4)
-    test-unit (3.6.8)
+    test-unit (3.7.0)
       power_assert
     timeout (0.4.3)
     tsort (0.2.0)
@@ -177,6 +180,7 @@ GEM
     zlib (3.2.1)
 
 PLATFORMS
+  arm64-darwin
   x86_64-linux
 
 DEPENDENCIES
diff --git a/core/io/wait.rbs b/core/io/wait.rbs
index cdeb653d17..9d09f201ea 100644
--- a/core/io/wait.rbs
+++ b/core/io/wait.rbs
@@ -24,7 +24,7 @@ class IO
   # <!--
   #   rdoc-file=ext/io/wait/wait.c
   #   - io.wait(events, timeout) -> event mask, false or nil
-  #   - io.wait(timeout = nil, mode = :read) -> self, true, or false
+  #   - io.wait(*event_symbols[, timeout]) -> self, true, or false
   # -->
   # Waits until the IO becomes ready for the specified events and returns the
   # subset of events that become ready, or a falsy value when times out.
@@ -32,9 +32,14 @@ class IO
   # The events can be a bit mask of `IO::READABLE`, `IO::WRITABLE` or
   # `IO::PRIORITY`.
   #
-  # Returns a truthy value immediately when buffered data is available.
+  # Returns an event mask (truthy value) immediately when buffered data is
+  # available.
   #
-  # Optional parameter `mode` is one of `:read`, `:write`, or `:read_write`.
+  # The second form: if one or more event symbols (`:read`, `:write`, or
+  # `:read_write`) are passed, the event mask is the bit OR of the bitmask
+  # corresponding to those symbols.  In this form, `timeout` is optional, the
+  # order of the arguments is arbitrary, and returns `io` if any of the events is
+  # ready.
   #
   # You must require 'io/wait' to use this method.
   #
diff --git a/core/kernel.rbs b/core/kernel.rbs
index bfb54d89b6..b50e581115 100644
--- a/core/kernel.rbs
+++ b/core/kernel.rbs
@@ -1814,10 +1814,10 @@ module Kernel : BasicObject
   #      and returns a `true` or `false`;
   #      returns `false` if either entity does not exist:
   #  Character  |Test
-  # ------------|---------------------------------------------------------------
-  # <tt>'<'</tt>|Whether the `mtime` at `path0` is less than that at `path1`.
-  # <tt>'='</tt>|Whether the `mtime` at `path0` is equal to that at `path1`.
-  # <tt>'>'</tt>|Whether the `mtime` at `path0` is greater than that at `path1`.
+  # ------------|------------------------------------------------------------------------------------------------
+  # <tt>'<'</tt>|Whether the <code>mtime</code> at <code>path0</code> is less than that at <code>path1</code>.
+  # <tt>'='</tt>|Whether the <code>mtime</code> at <code>path0</code> is equal to that at <code>path1</code>.
+  # <tt>'>'</tt>|Whether the <code>mtime</code> at <code>path0</code> is greater than that at <code>path1</code>.
   # *   This test operates on the content of each of the entities at `path0` and
   #     `path1`,
   #      and returns a `true` or `false`;
diff --git a/core/ruby_vm.rbs b/core/ruby_vm.rbs
index 623790ebc3..31568b4e24 100644
--- a/core/ruby_vm.rbs
+++ b/core/ruby_vm.rbs
@@ -686,7 +686,7 @@ module RubyVM::YJIT
   #   - enable(stats: false, log: false)
   # -->
   # Enable YJIT compilation. `stats` option decides whether to enable YJIT stats
-  # or not. `compilation_log` decides
+  # or not. `log` decides
   # whether to enable YJIT compilation logging or not.
   # *   `stats`:
   #     *   `false`: Don't enable stats.
diff --git a/core/rubygems/rubygems.rbs b/core/rubygems/rubygems.rbs
index 8b87aa6cef..dccf6f2d6c 100644
--- a/core/rubygems/rubygems.rbs
+++ b/core/rubygems/rubygems.rbs
@@ -1009,8 +1009,7 @@ module Gem
   #   - source_date_epoch_string()
   # -->
   # If the SOURCE_DATE_EPOCH environment variable is set, returns it's value.
-  # Otherwise, returns the time that `Gem.source_date_epoch_string` was first
-  # called in the same format as SOURCE_DATE_EPOCH.
+  # Otherwise, returns DEFAULT_SOURCE_DATE_EPOCH as a string.
   #
   # NOTE(@duckinator): The implementation is a tad weird because we want to:
   #     1. Make builds reproducible by default, by having this function always
diff --git a/core/time.rbs b/core/time.rbs
index 0d43e45ccc..606987871a 100644
--- a/core/time.rbs
+++ b/core/time.rbs
@@ -984,10 +984,20 @@ class Time < Object
   #     now = Time.now
   #     # => 2022-08-18 10:24:13.5398485 -0500
   #     now.utc? # => false
+  #     now.getutc.utc? # => true
   #     utc = Time.utc(2000, 1, 1, 20, 15, 1)
   #     # => 2000-01-01 20:15:01 UTC
   #     utc.utc? # => true
   #
+  # `Time` objects created with these methods are considered to be in UTC:
+  #
+  # *   Time.utc
+  # *   Time#utc
+  # *   Time#getutc
+  #
+  # Objects created in other ways will not be treated as UTC even if the
+  # environment variable "TZ" is "UTC".
+  #
   # Related: Time.utc.
   #
   def gmt?: () -> bool
@@ -1560,10 +1570,20 @@ class Time < Object
   #     now = Time.now
   #     # => 2022-08-18 10:24:13.5398485 -0500
   #     now.utc? # => false
+  #     now.getutc.utc? # => true
   #     utc = Time.utc(2000, 1, 1, 20, 15, 1)
   #     # => 2000-01-01 20:15:01 UTC
   #     utc.utc? # => true
   #
+  # `Time` objects created with these methods are considered to be in UTC:
+  #
+  # *   Time.utc
+  # *   Time#utc
+  # *   Time#getutc
+  #
+  # Objects created in other ways will not be treated as UTC even if the
+  # environment variable "TZ" is "UTC".
+  #
   # Related: Time.utc.
   #
   def utc?: () -> bool
diff --git a/stdlib/rdoc/0/code_object.rbs b/stdlib/rdoc/0/code_object.rbs
index af7f631f72..4e2baf858f 100644
--- a/stdlib/rdoc/0/code_object.rbs
+++ b/stdlib/rdoc/0/code_object.rbs
@@ -22,9 +22,10 @@ module RDoc
   #         *   RDoc::MetaMethod
   # *   RDoc::Alias
   # *   RDoc::Constant
+  # *   RDoc::Require
   # *   RDoc::Mixin
-  #     *   RDoc::Require
   #     *   RDoc::Include
+  #     *   RDoc::Extend
   #
   class CodeObject
     # <!-- rdoc-file=lib/rdoc/code_object.rb -->
diff --git a/stdlib/rdoc/0/parser.rbs b/stdlib/rdoc/0/parser.rbs
index 3b62f130a3..8ababe7b72 100644
--- a/stdlib/rdoc/0/parser.rbs
+++ b/stdlib/rdoc/0/parser.rbs
@@ -42,7 +42,7 @@ module RDoc
 
     # <!--
     #   rdoc-file=lib/rdoc/parser.rb
-    #   - new(top_level, file_name, content, options, stats)
+    #   - new(top_level, content, options, stats)
     # -->
     # Creates a new Parser storing `top_level`, `file_name`, `content`, `options`
     # and `stats` in instance variables.  In +@preprocess+ an
diff --git a/stdlib/rdoc/0/store.rbs b/stdlib/rdoc/0/store.rbs
index a48c95bd56..2f464f4296 100644
--- a/stdlib/rdoc/0/store.rbs
+++ b/stdlib/rdoc/0/store.rbs
@@ -22,7 +22,7 @@ module RDoc
   class Store
     # <!--
     #   rdoc-file=lib/rdoc/store.rb
-    #   - new(path = nil, type = nil)
+    #   - new(options, path: nil, type: nil)
     # -->
     # Creates a new Store of `type` that will load or save to `path`
     #
diff --git a/stdlib/strscan/0/string_scanner.rbs b/stdlib/strscan/0/string_scanner.rbs
index 9087428f63..6e82c20f4d 100644
--- a/stdlib/strscan/0/string_scanner.rbs
+++ b/stdlib/strscan/0/string_scanner.rbs
@@ -327,7 +327,7 @@
 #     Method     |          Return After Match           |Return After No Match
 # ---------------|---------------------------------------|---------------------
 #      #size     |     Count of captured substrings.     |       +nil+.
-#     #[](n)     |   <tt>n</tt>th captured substring.    |       +nil+.
+#     #{}[n]     |   <tt>n</tt>th captured substring.    |       +nil+.
 #    #captures   |   Array of all captured substrings.   |       +nil+.
 # #values_at(*n) |Array of specified captured substrings.|       +nil+.
 # #named_captures|        Hash of named captures.        |    <tt>{}</tt>.
diff --git a/stdlib/uri/0/common.rbs b/stdlib/uri/0/common.rbs
index 94b6d25c02..a7dd5fcaef 100644
--- a/stdlib/uri/0/common.rbs
+++ b/stdlib/uri/0/common.rbs
@@ -535,6 +535,9 @@ URI::ABS_URI: Regexp
 
 URI::ABS_URI_REF: Regexp
 
+# <!-- rdoc-file=lib/uri/common.rb -->
+# The default parser instance.
+#
 URI::DEFAULT_PARSER: URI::RFC2396_Parser
 
 URI::ESCAPED: Regexp
@@ -557,6 +560,9 @@ URI::REL_URI: Regexp
 
 URI::REL_URI_REF: Regexp
 
+# <!-- rdoc-file=lib/uri/common.rb -->
+# The default parser instance for RFC 3986.
+#
 URI::RFC3986_PARSER: URI::RFC3986_Parser
 
 URI::SCHEME: Regexp
diff --git a/stdlib/uri/0/generic.rbs b/stdlib/uri/0/generic.rbs
index 8e35c3af07..5a8e38d9fc 100644
--- a/stdlib/uri/0/generic.rbs
+++ b/stdlib/uri/0/generic.rbs
@@ -1017,6 +1017,7 @@ module URI
     #   rdoc-file=lib/uri/generic.rb
     #   - hash()
     # -->
+    # Returns the hash value.
     #
     def hash: () -> Integer
 
@@ -1024,6 +1025,7 @@ module URI
     #   rdoc-file=lib/uri/generic.rb
     #   - eql?(oth)
     # -->
+    # Compares with *oth* for Hash.
     #
     def eql?: (URI::Generic oth) -> bool