diff --git a/crates/agent-artifact-admission/src/pypi_python_interpreter_authority.rs b/crates/agent-artifact-admission/src/pypi_python_interpreter_authority.rs
index e07d655c..8af85435 100644
--- a/crates/agent-artifact-admission/src/pypi_python_interpreter_authority.rs
+++ b/crates/agent-artifact-admission/src/pypi_python_interpreter_authority.rs
@@ -1,4 +1,4 @@
-use crate::InstallIntent;
+use crate::{InstallIntent, policy::uv_active_command_index};
 
 /// Return whether a direct-pip General Option token selects the Python interpreter.
 ///
@@ -124,10 +124,9 @@ pub(crate) fn requests_unapproved_uv_python_provider_authority(intent: &InstallI
     }
 
     let arguments = &intent.argv[1..];
-    let run_index = arguments.iter().position(|argument| argument == "run");
-    let pip_index = arguments.iter().position(|argument| argument == "pip");
-
-    if run_index.is_some_and(|run_index| pip_index.is_none_or(|pip_index| run_index < pip_index)) {
+    if uv_active_command_index(arguments)
+        .is_some_and(|command_index| arguments[command_index] == "run")
+    {
         return false;
     }
 
diff --git a/crates/agent-artifact-admission/tests/uv_global_python_provider_value_boundary_contract.rs b/crates/agent-artifact-admission/tests/uv_global_python_provider_value_boundary_contract.rs
new file mode 100644
index 00000000..618702ce
--- /dev/null
+++ b/crates/agent-artifact-admission/tests/uv_global_python_provider_value_boundary_contract.rs
@@ -0,0 +1,171 @@
+use wardnet_agent_artifact_admission::{
+    AdmissionPolicy, ApprovedArtifact, ApprovedManifest, ArtifactCoordinate, DecisionKind,
+    InstallIntent, InstructionSource, InstructionSourceKind, ReasonCode, admission_decision,
+    sha256_hex,
+};
+
+#[test]
+fn parser_valid_global_project_value_named_run_preserves_python_provider_evidence() {
+    for option in ["--managed-python", "--no-managed-python"] {
+        let (policy, mut intent) = approved_uv_install();
+        intent.argv = vec![
+            "uv".to_string(),
+            "--project".to_string(),
+            "run".to_string(),
+            "pip".to_string(),
+            "install".to_string(),
+            "cwl-example==1.2.3".to_string(),
+            "--require-hashes".to_string(),
+            "--no-deps".to_string(),
+            "--no-python-downloads".to_string(),
+            option.to_string(),
+        ];
+
+        let decision = admission_decision(&policy, &intent);
+
+        assert_eq!(decision.decision, DecisionKind::Block);
+        assert!(
+            decision
+                .reason_codes
+                .contains(&ReasonCode::ForbiddenCommand),
+            "global-option uv install remains deliberately outside the supported command grammar: {:?}",
+            decision.reason_codes
+        );
+        assert!(
+            decision
+                .reason_codes
+                .contains(&ReasonCode::AlternateInstallRoot),
+            "the value token `run` consumed by --project is not the uv run command and must not erase causal {option} provider evidence: {:?}",
+            decision.reason_codes
+        );
+        assert_eq!(
+            decision.command_sha256,
+            sha256_hex(intent.argv.join("\u{1f}").as_bytes()),
+            "audit identity must remain bound to the exact submitted argv"
+        );
+    }
+}
+
+#[test]
+fn ordinary_global_project_value_keeps_existing_provider_evidence_control() {
+    for option in ["--managed-python", "--no-managed-python"] {
+        let (policy, mut intent) = approved_uv_install();
+        intent.argv = vec![
+            "uv".to_string(),
+            "--project".to_string(),
+            "workspace".to_string(),
+            "pip".to_string(),
+            "install".to_string(),
+            "cwl-example==1.2.3".to_string(),
+            "--require-hashes".to_string(),
+            "--no-deps".to_string(),
+            "--no-python-downloads".to_string(),
+            option.to_string(),
+        ];
+
+        let decision = admission_decision(&policy, &intent);
+
+        assert_eq!(decision.decision, DecisionKind::Block);
+        assert!(
+            decision
+                .reason_codes
+                .contains(&ReasonCode::ForbiddenCommand)
+        );
+        assert!(
+            decision
+                .reason_codes
+                .contains(&ReasonCode::AlternateInstallRoot),
+            "a non-command global value already preserves {option} provider evidence: {:?}",
+            decision.reason_codes
+        );
+    }
+}
+
+#[test]
+fn actual_uv_run_after_global_project_value_does_not_gain_install_provider_semantics() {
+    for option in ["--managed-python", "--no-managed-python"] {
+        let (policy, mut intent) = approved_uv_install();
+        intent.argv = vec![
+            "uv".to_string(),
+            "--project".to_string(),
+            "workspace".to_string(),
+            "run".to_string(),
+            option.to_string(),
+            "python".to_string(),
+        ];
+
+        let decision = admission_decision(&policy, &intent);
+
+        assert_eq!(decision.decision, DecisionKind::Block);
+        assert!(
+            decision
+                .reason_codes
+                .contains(&ReasonCode::ForbiddenCommand)
+        );
+        assert!(
+            !decision
+                .reason_codes
+                .contains(&ReasonCode::AlternateInstallRoot),
+            "actual uv run remains outside Agent Artifact Admission install-provider semantics: {:?}",
+            decision.reason_codes
+        );
+        assert_eq!(
+            decision.command_sha256,
+            sha256_hex(intent.argv.join("\u{1f}").as_bytes())
+        );
+    }
+}
+
+fn approved_uv_install() -> (AdmissionPolicy, InstallIntent) {
+    let artifact = ArtifactCoordinate {
+        ecosystem: "pypi".to_string(),
+        name: "cwl-example".to_string(),
+        version: "1.2.3".to_string(),
+        registry_url: "https://pypi.org/simple".to_string(),
+        owner: "ContextualWisdomLab".to_string(),
+        sha256: "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc".to_string(),
+        artifact_argument: "cwl-example==1.2.3".to_string(),
+    };
+    let policy = AdmissionPolicy {
+        policy_id: "uv-global-python-provider-value-boundary".to_string(),
+        policy_revision: "2026-09-19.1".to_string(),
+        allowed_executables: vec!["uv".to_string()],
+        approved_manifests: vec![ApprovedManifest {
+            workspace_id: "ContextualWisdomLab/wardnet".to_string(),
+            sha256: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".to_string(),
+        }],
+        approved_artifacts: vec![ApprovedArtifact {
+            ecosystem: artifact.ecosystem.clone(),
+            name: artifact.name.clone(),
+            version: artifact.version.clone(),
+            registry_url: artifact.registry_url.clone(),
+            owner: artifact.owner.clone(),
+            sha256: artifact.sha256.clone(),
+            artifact_argument: artifact.artifact_argument.clone(),
+        }],
+    };
+    let intent = InstallIntent {
+        request_id: "req-uv-global-python-provider-value-boundary".to_string(),
+        actor_id: "agent:wardnet:admission".to_string(),
+        workspace_id: "ContextualWisdomLab/wardnet".to_string(),
+        operation: "install".to_string(),
+        argv: vec![
+            "uv".to_string(),
+            "pip".to_string(),
+            "install".to_string(),
+            "cwl-example==1.2.3".to_string(),
+            "--require-hashes".to_string(),
+            "--no-deps".to_string(),
+            "--no-python-downloads".to_string(),
+        ],
+        manifest_sha256: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+            .to_string(),
+        source: InstructionSource {
+            kind: InstructionSourceKind::ReviewedConfig,
+            uri: None,
+            content_sha256: None,
+        },
+        artifacts: vec![artifact],
+    };
+    (policy, intent)
+}