diff --git a/.changes/unreleased/Under the Hood-20230316-123305.yaml b/.changes/unreleased/Under the Hood-20230316-123305.yaml
new file mode 100644
index 00000000000..8aace685284
--- /dev/null
+++ b/.changes/unreleased/Under the Hood-20230316-123305.yaml	
@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Add CommandCompleted event, and fire it upon completion of every command
+time: 2023-03-16T12:33:05.696752-07:00
+custom:
+  Author: QMalcolm
+  Issue: "6878"
diff --git a/core/dbt/cli/requires.py b/core/dbt/cli/requires.py
index adeeb0b485a..5915187ce22 100644
--- a/core/dbt/cli/requires.py
+++ b/core/dbt/cli/requires.py
@@ -5,7 +5,12 @@
 from dbt.config import RuntimeConfig
 from dbt.config.runtime import load_project, load_profile, UnsetProfile
 from dbt.events.functions import setup_event_logger, fire_event, LOG_VERSION
-from dbt.events.types import MainReportVersion, MainReportArgs, MainTrackingUserState
+from dbt.events.types import (
+    CommandCompleted,
+    MainReportVersion,
+    MainReportArgs,
+    MainTrackingUserState,
+)
 from dbt.exceptions import DbtProjectError
 from dbt.parser.manifest import ManifestLoader, write_manifest
 from dbt.profiler import profiler
@@ -13,7 +18,9 @@
 from dbt.utils import cast_dict_to_dict_of_strings
 
 from click import Context
+import datetime
 from functools import update_wrapper
+import time
 
 
 def preflight(func):
@@ -53,7 +60,33 @@ def wrapper(*args, **kwargs):
         # Adapter management
         ctx.with_resource(adapter_management())
 
-        return func(*args, **kwargs)
+        start_func = time.perf_counter()
+
+        try:
+            (results, success) = func(*args, **kwargs)
+
+            fire_event(
+                CommandCompleted(
+                    command=ctx.command_path,
+                    success=success,
+                    completed_at=datetime.datetime.utcnow(),
+                    elapsed=time.perf_counter() - start_func,
+                )
+            )
+        # Bare except because we really do want to catch ALL exceptions,
+        # i.e. we want to fire this event in ALL cases.
+        except:  # noqa
+            fire_event(
+                CommandCompleted(
+                    command=ctx.command_path,
+                    success=False,
+                    completed_at=datetime.datetime.utcnow(),
+                    elapsed=time.perf_counter() - start_func,
+                )
+            )
+            raise
+
+        return (results, success)
 
     return update_wrapper(wrapper, func)
 
diff --git a/core/dbt/events/proto_types.py b/core/dbt/events/proto_types.py
index acb968c2654..a00ab8b9de2 100644
--- a/core/dbt/events/proto_types.py
+++ b/core/dbt/events/proto_types.py
@@ -2210,6 +2210,22 @@ class NoNodesSelectedMsg(betterproto.Message):
     data: "NoNodesSelected" = betterproto.message_field(2)
 
 
+@dataclass
+class CommandCompleted(betterproto.Message):
+    """Q039"""
+
+    command: str = betterproto.string_field(1)
+    success: bool = betterproto.bool_field(2)
+    completed_at: datetime = betterproto.message_field(3)
+    elapsed: float = betterproto.float_field(4)
+
+
+@dataclass
+class CommandCompletedMsg(betterproto.Message):
+    info: "EventInfo" = betterproto.message_field(1)
+    data: "CommandCompleted" = betterproto.message_field(2)
+
+
 @dataclass
 class CatchableExceptionOnRun(betterproto.Message):
     """W002"""
diff --git a/core/dbt/events/types.proto b/core/dbt/events/types.proto
index f7ced23f1d5..41dc8432af5 100644
--- a/core/dbt/events/types.proto
+++ b/core/dbt/events/types.proto
@@ -1767,6 +1767,19 @@ message NoNodesSelectedMsg {
     NoNodesSelected data = 2;
 }
 
+// Q039
+message CommandCompleted {
+    string command = 1;
+    bool success = 2;
+    google.protobuf.Timestamp completed_at = 3;
+    float elapsed = 4;
+}
+
+message CommandCompletedMsg {
+    EventInfo info = 1;
+    CommandCompleted data = 2;
+}
+
 // W - Node testing
 
 // Skipped W001
diff --git a/core/dbt/events/types.py b/core/dbt/events/types.py
index 91c60996226..dd56136b8b4 100644
--- a/core/dbt/events/types.py
+++ b/core/dbt/events/types.py
@@ -1863,6 +1863,16 @@ def message(self) -> str:
         return "No nodes selected!"
 
 
+@dataclass
+class CommandCompleted(DebugLevel, pt.CommandCompleted):
+    def code(self):
+        return "Q039"
+
+    def message(self) -> str:
+        status = "succeeded" if self.success else "failed"
+        return f"Command `{self.command}` {status} at {self.completed_at} after {self.elapsed:0.2f} seconds"
+
+
 # =======================================================
 # W - Node testing
 # =======================================================
diff --git a/tests/unit/test_events.py b/tests/unit/test_events.py
index 2b4f8126eea..1d70ebed81d 100644
--- a/tests/unit/test_events.py
+++ b/tests/unit/test_events.py
@@ -1,6 +1,7 @@
 import re
 from typing import TypeVar
 
+from datetime import datetime
 from dbt.contracts.results import TimingInfo
 from dbt.events import AdapterLogger, test_types, types
 from dbt.events.base_types import (
@@ -328,6 +329,7 @@ def test_event_codes(self):
     types.NoNodesSelected(),
     types.DepsUnpinned(revision="", git=""),
     types.NoNodesForSelectionCriteria(spec_raw=""),
+    types.CommandCompleted(command="", success=True, elapsed=0.1, completed_at=datetime.utcnow()),
     # W - Node testing ======================
     types.CatchableExceptionOnRun(exc=""),
     types.InternalErrorOnRun(build_path="", exc=""),