diff --git a/codecov-cli/codecov_cli/helpers/ci_adapters/__init__.py b/codecov-cli/codecov_cli/helpers/ci_adapters/__init__.py
index fa1422392..abb3ceb7e 100644
--- a/codecov-cli/codecov_cli/helpers/ci_adapters/__init__.py
+++ b/codecov-cli/codecov_cli/helpers/ci_adapters/__init__.py
@@ -14,6 +14,7 @@
 from codecov_cli.helpers.ci_adapters.droneci import DroneCIAdapter
 from codecov_cli.helpers.ci_adapters.github_actions import GithubActionsCIAdapter
 from codecov_cli.helpers.ci_adapters.gitlab_ci import GitlabCIAdapter
+from codecov_cli.helpers.ci_adapters.harness import HarnessAdapter
 from codecov_cli.helpers.ci_adapters.heroku import HerokuCIAdapter
 from codecov_cli.helpers.ci_adapters.jenkins import JenkinsAdapter
 from codecov_cli.helpers.ci_adapters.local import LocalAdapter
@@ -48,6 +49,7 @@ def get_ci_providers_list():
         BitriseCIAdapter(),
         AppveyorCIAdapter(),
         WoodpeckerCIAdapter(),
+        HarnessAdapter(),
         HerokuCIAdapter(),
         DroneCIAdapter(),
         BuildkiteAdapter(),
diff --git a/codecov-cli/codecov_cli/helpers/ci_adapters/harness.py b/codecov-cli/codecov_cli/helpers/ci_adapters/harness.py
new file mode 100644
index 000000000..18f901473
--- /dev/null
+++ b/codecov-cli/codecov_cli/helpers/ci_adapters/harness.py
@@ -0,0 +1,63 @@
+import os
+
+from codecov_cli.helpers.ci_adapters.base import CIAdapterBase
+from codecov_cli.helpers.git import parse_slug
+
+# https://developer.harness.io/docs/continuous-integration/troubleshoot-ci/ci-env-var/
+
+# Uses CI_ prefixed environment variables variant if available and DRONE_ prefixed environment variables variant if not
+# The DRONE variables overlap with the Drone CI Adapter as Harness CI is built on top 
+class HarnessAdapter(CIAdapterBase):
+    def detect(self) -> bool:
+        return bool(os.getenv("HARNESS_BUILD_ID"))
+
+    def _get_branch(self):
+        return os.getenv("DRONE_COMMIT_BRANCH")
+
+    def _get_commit_sha(self):
+        return os.getenv("DRONE_COMMIT_SHA")
+
+    def _get_pull_request_number(self):
+        return os.getenv("DRONE_PULL_REQUEST")
+
+    def _get_job_code(self):
+        return None
+
+    def _get_build_code(self):
+        return os.getenv("CI_BUILD_NUMBER")
+
+    def _get_build_url(self):
+        return os.getenv("CI_BUILD_LINK")
+
+    def _get_slug(self):
+        # DRONE_REPO is the canonical org/repo slug on Harness CI (Drone-compatible).
+        # CI_REPO is often equivalent but some setups only set the repo name; then use
+        # DRONE_REPO_NAMESPACE + DRONE_REPO_NAME (or short CI_REPO as the name part).
+        if drone_repo := os.getenv("DRONE_REPO"):
+            return drone_repo
+        ci_repo = os.getenv("CI_REPO")
+        if ci_repo and "/" in ci_repo:
+            return ci_repo
+        namespace = os.getenv("DRONE_REPO_NAMESPACE") or os.getenv("CI_REPO_NAMESPACE")
+        name = os.getenv("DRONE_REPO_NAME") or (
+            ci_repo if ci_repo and "/" not in ci_repo else None
+        )
+        if namespace and name:
+            return f"{namespace}/{name}"
+        # Many Harness builds omit CI_REPO / *_NAMESPACE but still set clone/remotes:
+        # https://developer.harness.io/docs/continuous-integration/troubleshoot-ci/ci-env-var/
+        for env_var in (
+            "DRONE_GIT_HTTP_URL",
+            "CI_REPO_REMOTE",
+            "DRONE_REMOTE_URL",
+        ):
+            if url := os.getenv(env_var):
+                if slug := parse_slug(url):
+                    return slug
+        return None
+
+    def _get_service(self):
+        return "harness"
+
+    def get_service_name(self):
+        return "Harness"
\ No newline at end of file
diff --git a/codecov-cli/codecovcli_commands b/codecov-cli/codecovcli_commands
index 691eaa476..bd72875a9 100644
--- a/codecov-cli/codecovcli_commands
+++ b/codecov-cli/codecovcli_commands
@@ -1,7 +1,7 @@
 Usage: codecovcli [OPTIONS] COMMAND [ARGS]...
 
 Options:
-  --auto-load-params-from [CircleCI|GithubActions|GitlabCI|Bitbucket|Bitrise|AppVeyor|Woodpecker|Heroku|DroneCI|BuildKite|AzurePipelines|Jenkins|CirrusCI|Teamcity|Travis|AWSCodeBuild|GoogleCloudBuild|Local]
+  --auto-load-params-from [CircleCI|GithubActions|GitlabCI|Bitbucket|Bitrise|AppVeyor|Woodpecker|Harness|Heroku|DroneCI|BuildKite|AzurePipelines|Jenkins|CirrusCI|Teamcity|Travis|AWSCodeBuild|GoogleCloudBuild|Local]
   --codecov-yml-path PATH
   -u, --enterprise-url, --url TEXT
                                   Change the upload host (Enterprise use)
diff --git a/codecov-cli/pyproject.toml b/codecov-cli/pyproject.toml
index d820e703f..649220925 100644
--- a/codecov-cli/pyproject.toml
+++ b/codecov-cli/pyproject.toml
@@ -47,8 +47,8 @@ Homepage = "https://about.codecov.io"
 requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
-[tool.setuptools]
-packages = ["codecov_cli"]
+[tool.setuptools.packages.find]
+include = ["codecov_cli*"]
 
 [tool.pytest.ini_options]
 env = ["CODECOV_ENV=test"]
diff --git a/codecov-cli/tests/ci_adapters/test_harnessci.py b/codecov-cli/tests/ci_adapters/test_harnessci.py
new file mode 100644
index 000000000..cebc83126
--- /dev/null
+++ b/codecov-cli/tests/ci_adapters/test_harnessci.py
@@ -0,0 +1,156 @@
+import os
+from enum import Enum
+
+import pytest
+
+from codecov_cli.fallbacks import FallbackFieldEnum
+from codecov_cli.helpers.ci_adapters import HarnessAdapter
+
+
+class HarnessEnvEnum(str, Enum):
+    HARNESS_BUILD_ID = "HARNESS_BUILD_ID"
+    CI_BUILD_LINK = "CI_BUILD_LINK"
+    CI_BUILD_NUMBER = "CI_BUILD_NUMBER"
+    CI_REPO = "CI_REPO"
+    CI_REPO_NAMESPACE = "CI_REPO_NAMESPACE"
+    DRONE = "DRONE"
+    DRONE_COMMIT_BRANCH = "DRONE_COMMIT_BRANCH"
+    DRONE_COMMIT_SHA = "DRONE_COMMIT_SHA"
+    DRONE_PULL_REQUEST = "DRONE_PULL_REQUEST"
+    DRONE_GIT_HTTP_URL = "DRONE_GIT_HTTP_URL"
+    DRONE_REMOTE_URL = "DRONE_REMOTE_URL"
+    DRONE_REPO = "DRONE_REPO"
+    DRONE_REPO_NAME = "DRONE_REPO_NAME"
+    DRONE_REPO_NAMESPACE = "DRONE_REPO_NAMESPACE"
+    CI_REPO_REMOTE = "CI_REPO_REMOTE"
+
+class TestHarnessCI(object):
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, False),
+        ({HarnessEnvEnum.HARNESS_BUILD_ID: "123"}, True),
+        ],
+    )
+    def test_detect(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().detect()
+        assert actual == expected
+
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, None),
+        ({HarnessEnvEnum.DRONE_COMMIT_BRANCH: "branch"}, "branch"),
+        ],
+    )
+    def test_branch(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.branch)
+        assert actual == expected
+
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, None),
+        ({HarnessEnvEnum.DRONE_COMMIT_SHA: "sha"}, "sha"),
+        ],
+    )
+    def test_commit_sha(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.commit_sha)
+        assert actual == expected
+
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, None),
+        ({HarnessEnvEnum.DRONE_PULL_REQUEST: "123"}, "123"),
+        ],
+    )
+    def test_pull_request_number(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.pull_request_number)
+        assert actual == expected
+
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, None),
+        ({HarnessEnvEnum.CI_BUILD_NUMBER: "123"}, "123"),
+        ],
+    )
+    def test_build_code(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.build_code)
+        assert actual == expected
+        
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+        ({}, None),
+        ({HarnessEnvEnum.CI_BUILD_LINK: "https://example.com"}, "https://example.com"),
+        ],
+    )
+    def test_build_url(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.build_url)
+        assert actual == expected
+
+    @pytest.mark.parametrize(
+        "env_dict,expected",
+        [
+            ({}, None),
+            ({HarnessEnvEnum.DRONE_REPO: "owner/repo"}, "owner/repo"),
+            ({HarnessEnvEnum.CI_REPO: "owner/repo"}, "owner/repo"),
+            (
+                {
+                    HarnessEnvEnum.DRONE_REPO_NAMESPACE: "owner",
+                    HarnessEnvEnum.DRONE_REPO_NAME: "repo",
+                },
+                "owner/repo",
+            ),
+            (
+                {
+                    HarnessEnvEnum.DRONE_REPO_NAMESPACE: "owner",
+                    HarnessEnvEnum.CI_REPO: "repo",
+                },
+                "owner/repo",
+            ),
+            (
+                {
+                    HarnessEnvEnum.CI_REPO_NAMESPACE: "owner",
+                    HarnessEnvEnum.CI_REPO: "repo",
+                },
+                "owner/repo",
+            ),
+            ({HarnessEnvEnum.CI_REPO: "repo"}, None),
+            (
+                {
+                    HarnessEnvEnum.DRONE_GIT_HTTP_URL: "https://github.com/myorg/myrepo.git",
+                },
+                "myorg/myrepo",
+            ),
+            (
+                {
+                    HarnessEnvEnum.CI_REPO_REMOTE: "https://gitlab.com/mygroup/myrepo.git",
+                },
+                "mygroup/myrepo",
+            ),
+            (
+                {
+                    HarnessEnvEnum.DRONE_REMOTE_URL: "git@github.com:acme/coverage.git",
+                },
+                "acme/coverage",
+            ),
+        ],
+    )
+    def test_slug(self, env_dict, expected, mocker):
+        mocker.patch.dict(os.environ, env_dict)
+        actual = HarnessAdapter().get_fallback_value(FallbackFieldEnum.slug)
+        assert actual == expected
+
+    def test_service(self):
+        assert (
+            HarnessAdapter().get_fallback_value(FallbackFieldEnum.service) == "harness"
+        )
\ No newline at end of file
diff --git a/codecov-cli/tests/helpers/test_ci_adapter_selection.py b/codecov-cli/tests/helpers/test_ci_adapter_selection.py
index 61bf5a86a..7649b878c 100644
--- a/codecov-cli/tests/helpers/test_ci_adapter_selection.py
+++ b/codecov-cli/tests/helpers/test_ci_adapter_selection.py
@@ -12,6 +12,7 @@
     DroneCIAdapter,
     GithubActionsCIAdapter,
     GitlabCIAdapter,
+    HarnessAdapter,
     HerokuCIAdapter,
     JenkinsAdapter,
     LocalAdapter,
@@ -53,6 +54,9 @@ def test_returns_woodpecker(self):
     def test_returns_teamcity(self):
         assert isinstance(get_ci_adapter("teamcity"), TeamcityAdapter)
 
+    def test_returns_harness(self):
+        assert isinstance(get_ci_adapter("harness"), HarnessAdapter)
+
     def test_returns_herokuci(self):
         assert isinstance(get_ci_adapter("heroku"), HerokuCIAdapter)
 
diff --git a/prevent-cli/preventcli_commands b/prevent-cli/preventcli_commands
index e7dabef99..8a860d2a1 100644
--- a/prevent-cli/preventcli_commands
+++ b/prevent-cli/preventcli_commands
@@ -1,7 +1,7 @@
 Usage: sentry-prevent-cli [OPTIONS] COMMAND [ARGS]...
 
 Options:
-  --auto-load-params-from [CircleCI|GithubActions|GitlabCI|Bitbucket|Bitrise|AppVeyor|Woodpecker|Heroku|DroneCI|BuildKite|AzurePipelines|Jenkins|CirrusCI|Teamcity|Travis|AWSCodeBuild|GoogleCloudBuild|Local]
+  --auto-load-params-from [CircleCI|GithubActions|GitlabCI|Bitbucket|Bitrise|AppVeyor|Woodpecker|Harness|Heroku|DroneCI|BuildKite|AzurePipelines|Jenkins|CirrusCI|Teamcity|Travis|AWSCodeBuild|GoogleCloudBuild|Local]
   --yml-path PATH
   -u, --enterprise-url, --url TEXT
                                   Change the upload host (Enterprise use)