diff --git a/src/rez/package_filter.py b/src/rez/package_filter.py
index 049867ba0..c6e64fb5c 100644
--- a/src/rez/package_filter.py
+++ b/src/rez/package_filter.py
@@ -369,11 +369,12 @@ def parse_rule(cls, txt):
         Returns:
             Rule:
         """
-        types = {"glob": GlobRule,
-                 "regex": RegexRule,
-                 "range": RangeRule,
-                 "before": TimestampRule,
-                 "after": TimestampRule}
+        types: dict[str, type[Rule]] = {
+            "glob": GlobRule,
+            "regex": RegexRule,
+            "range": RangeRule,
+            "before": TimestampRule,
+            "after": TimestampRule}
 
         # parse form 'x(y)' into x, y
         label, txt = Rule._parse_label(txt)
@@ -440,7 +441,7 @@ def cost(self):
         return 10
 
     @classmethod
-    def _parse(cls, txt):
+    def _parse(cls, txt: str):
         _, txt = Rule._parse_label(txt)
         return cls(txt)
 
diff --git a/src/rez/package_maker.py b/src/rez/package_maker.py
index 6c4aa5eda..3b3b94069 100644
--- a/src/rez/package_maker.py
+++ b/src/rez/package_maker.py
@@ -20,6 +20,7 @@
 from rez.version import Version
 from contextlib import contextmanager
 import os
+from typing import Iterable
 
 
 # this schema will automatically harden request strings like 'python-*'; see
@@ -200,19 +201,20 @@ def make_package(name, path, make_base=None, make_root=None, skip_existing=True,
     #
 
     package = maker.get_package()
-    src_variants: list[Variant] = []
 
     # skip those variants that already exist
     if skip_existing:
+        variants: list[Variant] = []
         for variant in package.iter_variants():
             variant_ = variant.install(path, dry_run=True)
             if variant_ is None:
-                src_variants.append(variant)
+                variants.append(variant)
             else:
                 maker.skipped_variants.append(variant_)
                 if warn_on_skip:
                     print_warning("Skipping installation: Package variant already "
                                   "exists: %s" % variant_.uri)
+        src_variants: Iterable[Variant] = variants
     else:
         src_variants = package.iter_variants()
 
diff --git a/src/rez/resolved_context.py b/src/rez/resolved_context.py
index 5008ce92d..29f58fa7a 100644
--- a/src/rez/resolved_context.py
+++ b/src/rez/resolved_context.py
@@ -734,7 +734,7 @@ def read_from_buffer(cls, buf, identifier_str=None):
         except Exception as e:
             cls._load_error(e, identifier_str)
 
-    def get_resolve_diff(self, other):
+    def get_resolve_diff(self, other: ResolvedContext):
         """Get the difference between the resolve in this context and another.
 
         The difference is described from the point of view of the current context
diff --git a/src/rez/rex.py b/src/rez/rex.py
index 42282d2a9..c7dcad6a5 100644
--- a/src/rez/rex.py
+++ b/src/rez/rex.py
@@ -13,6 +13,7 @@
 from contextlib import contextmanager
 from string import Formatter
 from collections.abc import MutableMapping
+from typing import Iterable
 
 from rez.system import system
 from rez.config import config
@@ -178,7 +179,7 @@ class ActionManager(object):
     triggers the callbacks of the `ActionInterpreter`.
     """
     def __init__(self, interpreter: ActionInterpreter, parent_environ: dict[str, str] | None = None,
-                 parent_variables=None, formatter=None, verbose=False, env_sep_map=None):
+                 parent_variables: Iterable[str] | None = None, formatter=None, verbose=False, env_sep_map=None):
         '''
         interpreter: string or `ActionInterpreter`
             the interpreter to use when executing rex actions
diff --git a/src/rez/shells.py b/src/rez/shells.py
index 343280af6..03d27a057 100644
--- a/src/rez/shells.py
+++ b/src/rez/shells.py
@@ -36,7 +36,7 @@ def get_shell_types() -> list[str]:
     return list(plugin_manager.get_plugins('shell'))
 
 
-def get_shell_class(shell=None) -> type[Shell]:
+def get_shell_class(shell: str | None = None) -> type[Shell]:
     """Get the plugin class associated with the given or current shell.
 
     Returns:
@@ -47,9 +47,9 @@ def get_shell_class(shell=None) -> type[Shell]:
         if not shell:
             from rez.system import system
             shell = system.shell
-
+    assert shell is not None
     from rez.plugin_managers import plugin_manager
-    return plugin_manager.get_plugin_class("shell", shell, type=Shell)
+    return plugin_manager.get_plugin_class("shell", shell, Shell)
 
 
 def create_shell(shell: str | None = None, **kwargs) -> Shell:
@@ -335,7 +335,7 @@ class UnixShell(Shell):
     command_arg = '-c'
     stdin_arg = '-s'
     last_command_status = '$?'
-    syspaths = None
+    syspaths: list[str] = None
 
     #
     # startup rules
diff --git a/src/rez/suite.py b/src/rez/suite.py
index 1a6c1ff89..5b0f44148 100644
--- a/src/rez/suite.py
+++ b/src/rez/suite.py
@@ -39,6 +39,10 @@ class Context(TypedDict):
         hidden_tools: set[str]
         priority: int
         prefix_char: str | None
+        loaded: bool
+        prefix: str
+        suffix: str
+
 else:
     Tool = dict
     Context = dict
diff --git a/src/rezplugins/release_hook/amqp.py b/src/rezplugins/release_hook/amqp.py
index cb3cefc3f..2d6c25e0f 100644
--- a/src/rezplugins/release_hook/amqp.py
+++ b/src/rezplugins/release_hook/amqp.py
@@ -5,10 +5,13 @@
 """
 Publishes a message to the broker.
 """
+from __future__ import annotations
+
 from rez.release_hook import ReleaseHook
 from rez.utils.logging_ import print_error, print_debug
 from rez.utils.amqp import publish_message
 from rez.config import config
+from typing import Any
 
 
 class AmqpReleaseHook(ReleaseHook):
@@ -55,7 +58,7 @@ def post_release(self, user, install_path, variants, **kwargs):
             package = self.package
 
         # build the message dict
-        data = {}
+        data: dict[str, Any] = {}
         data["package"] = dict(
             name=package.name,
             version=str(package.version),