diff --git a/osdk/context.py b/osdk/context.py
index 23852ad..404942f 100644
--- a/osdk/context.py
+++ b/osdk/context.py
@@ -2,7 +2,7 @@ from typing import cast, Protocol
 from pathlib import Path
 
 
-from osdk.model import TargetManifest, ComponentManifest, Props, Type, Tool
+from osdk.model import TargetManifest, ComponentManifest, Props, Type, Tool, Tools
 from osdk.logger import Logger
 from osdk import const, shell, jexpr, utils, rules
 
@@ -63,9 +63,9 @@ class ComponentInstance:
 class Context(IContext):
     target: TargetManifest
     instances: list[ComponentInstance]
-    tools: dict[str, Tool]
+    tools: Tools
 
-    def __init__(self, target: TargetManifest, instances: list[ComponentInstance], tools: dict[str, Tool]):
+    def __init__(self, target: TargetManifest, instances: list[ComponentInstance], tools: Tools):
         self.target = target
         self.instances = instances
         self.tools = tools
@@ -188,7 +188,7 @@ def contextFor(targetSpec: str, props: Props) -> Context:
 
     target = loadTarget(targetSpec)
     components = loadAllComponents()
-    tools: dict[str, Tool] = {}
+    tools: Tools = {}
 
     for toolSpec in target.tools:
         tool = target.tools[toolSpec]
diff --git a/osdk/mixins.py b/osdk/mixins.py
new file mode 100644
index 0000000..77ce0d0
--- /dev/null
+++ b/osdk/mixins.py
@@ -0,0 +1,70 @@
+from typing import Callable
+from osdk.model import TargetManifest, Tools
+
+Mixin = Callable[[TargetManifest, Tools], Tools]
+
+
+def patchToolArgs(tools: Tools, toolSpec: str, args: list[str]):
+    tools[toolSpec].args += args
+
+
+def prefixToolCmd(tools: Tools, toolSpec: str, prefix: str):
+    tools[toolSpec].cmd = prefix + " " + tools[toolSpec].cmd
+
+
+def mixinCache(target: TargetManifest, tools: Tools) -> Tools:
+    prefixToolCmd(tools, "cc", "ccache")
+    prefixToolCmd(tools, "cxx", "ccache")
+    return tools
+
+
+def makeMixinSan(san: str) -> Mixin:
+    def mixinSan(target: TargetManifest, tools: Tools) -> Tools:
+        patchToolArgs(
+            tools, "cc", [f"-fsanitize={san}"])
+        patchToolArgs(
+            tools, "cxx", [f"-fsanitize={san}"])
+        patchToolArgs(
+            tools, "ld", [f"-fsanitize={san}"])
+
+        return tools
+
+    return mixinSan
+
+
+def makeMixinOptimize(level: str) -> Mixin:
+    def mixinOptimize(target: TargetManifest, tools: Tools) -> Tools:
+        patchToolArgs(tools, "cc", [f"-O{level}"])
+        patchToolArgs(tools, "cxx", [f"-O{level}"])
+
+        return tools
+
+    return mixinOptimize
+
+
+def mixinDebug(target: TargetManifest, tools: Tools) -> Tools:
+    patchToolArgs(tools, "cc", ["-g"])
+    patchToolArgs(tools, "cxx", ["-g"])
+
+    return tools
+
+
+mixins: dict[str, Mixin] = {
+    "cache": mixinCache,
+    "debug": mixinDebug,
+    "asan": makeMixinSan("address"),
+    "msan": makeMixinSan("memory"),
+    "tsan": makeMixinSan("thread"),
+    "ubsan": makeMixinSan("undefined"),
+    "o3": makeMixinOptimize("3"),
+    "o2": makeMixinOptimize("2"),
+    "o1": makeMixinOptimize("1"),
+    "o0": makeMixinOptimize("0"),
+}
+
+
+def append(mixinSpec: str, mixin: Mixin):
+    mixins[mixinSpec] = mixin
+
+def byId(id: str) -> Mixin:
+    return mixins[id]
diff --git a/osdk/model.py b/osdk/model.py
index 64fecb4..0d9ded1 100644
--- a/osdk/model.py
+++ b/osdk/model.py
@@ -85,9 +85,12 @@ class Tool:
         return f"Tool({self.cmd})"
 
 
+Tools = dict[str, Tool]
+
+
 class TargetManifest(Manifest):
     props: Props
-    tools: dict[str, Tool]
+    tools: Tools
     routing: dict[str, str]
 
     def __init__(self, json: Json = None, path: str = "", strict=True, **kwargs):
@@ -131,7 +134,7 @@ class TargetManifest(Manifest):
 class ComponentManifest(Manifest):
     decription: str = "(No description)"
     props: Props = {}
-    tools: dict[str, Tool] = {}
+    tools: Tools = {}
     enableIf: dict[str, list[Any]] = {}
     requires: list[str] = []
     provides: list[str] = []