diff --git a/contracts/work/lease.go b/contracts/work/lease.go
index 756df90..0927819 100644
--- a/contracts/work/lease.go
+++ b/contracts/work/lease.go
@@ -38,3 +38,13 @@ type AgentCallback struct {
 	Kind         AgentCallbackKind
 	ObservedAt   time.Time
 }
+
+type IndependentVerification struct {
+	ProducerRunID    AgentRunID
+	VerifierRunID    AgentRunID
+	VerifierIdentity string
+	ArtifactID       string
+	TestEvidenceRef  string
+	Verified         bool
+	Summary          string
+}
diff --git a/dev/ACTIVE_TASK.json b/dev/ACTIVE_TASK.json
index c00a6fa..3dbe2f3 100644
--- a/dev/ACTIVE_TASK.json
+++ b/dev/ACTIVE_TASK.json
@@ -1,5 +1,5 @@
 {
-  "task_file": "dev/tasks/DEV-000118-agent-artifact-attestation.json",
-  "task_id": "DEV-000118",
+  "task_file": "dev/tasks/DEV-000119-independent-verification-contract.json",
+  "task_id": "DEV-000119",
   "task_revision": 1
 }
diff --git a/dev/tasks/DEV-000119-independent-verification-contract.json b/dev/tasks/DEV-000119-independent-verification-contract.json
new file mode 100644
index 0000000..b1dff72
--- /dev/null
+++ b/dev/tasks/DEV-000119-independent-verification-contract.json
@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000119",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "02b472b",
+  "risk_tier": "E",
+  "intent": "Add independent verification contract requiring a distinct verifier identity/run and attested artifact evidence before Work completion.",
+  "requirement_ids": ["WP-301", "Independent verifier", "Work completion gate"],
+  "allowed_change_scope": {"modules": ["work-agent-verification"], "paths": ["contracts/work/**", "modules/work/domain/**", "tests/agent_execution/**", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000119-independent-verification-contract.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "database/**", "migrations/**", "deploy/**", "security/**", "cmd/**", "runtime/**", "adapters/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["ADR-0017 verification separation", "ADR-0020 independent verifier", "Agent artifact attestation from DEV-000118"], "may_change": ["Work independent verification contract"]},
+  "semantic_owner": "work-agent-verification",
+  "canonical_state": [],
+  "state_transitions": ["producer result + attestation -> verifier assessment -> verified/rejected"],
+  "side_effects_and_privileges": ["Pure validation; no merge, deployment, binding activation, credential access or external mutation"],
+  "persistence_and_migrations": ["No schema or migration changes"],
+  "failure_retry_restart": ["Rejected verification preserves producer evidence; a new verifier run is required"],
+  "assumptions": ["Verifier identity and run are authenticated later", "Producer and verifier cannot be the same run", "Artifact evidence is immutable"],
+  "acceptance_scenarios": ["Distinct verifier validates attested artifact", "Same run is rejected", "Missing artifact/test evidence is rejected", "Rejected verification does not erase producer result"],
+  "required_tests": ["go test ./...", "go vet ./...", "go run ./cmd/devctl preflight -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-diff -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl/independent", "git diff --check", "independent verification tests"],
+  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
+}
diff --git a/modules/work/domain/lease.go b/modules/work/domain/lease.go
index 2964af8..1103a99 100644
--- a/modules/work/domain/lease.go
+++ b/modules/work/domain/lease.go
@@ -32,3 +32,10 @@ func ValidateAgentCallback(callback work.AgentCallback, lease work.AgentLease, l
 	}
 	return nil
 }
+
+func ValidateIndependentVerification(value work.IndependentVerification) error {
+	if value.ProducerRunID == "" || value.VerifierRunID == "" || value.ProducerRunID == value.VerifierRunID || value.VerifierIdentity == "" || value.ArtifactID == "" || value.TestEvidenceRef == "" || value.Summary == "" {
+		return ErrCallbackRejected
+	}
+	return nil
+}
diff --git a/tests/agent_execution/verification_test.go b/tests/agent_execution/verification_test.go
new file mode 100644
index 0000000..260ff4d
--- /dev/null
+++ b/tests/agent_execution/verification_test.go
@@ -0,0 +1,19 @@
+package agent_execution_test
+
+import (
+	"testing"
+
+	"git.cin.su/m/Assistant/contracts/work"
+	workdomain "git.cin.su/m/Assistant/modules/work/domain"
+)
+
+func TestIndependentVerificationRequiresDistinctRun(t *testing.T) {
+	verification := work.IndependentVerification{ProducerRunID: "producer-1", VerifierRunID: "verifier-1", VerifierIdentity: "verifier", ArtifactID: "artifact-1", TestEvidenceRef: "tests-1", Verified: true, Summary: "passed"}
+	if err := workdomain.ValidateIndependentVerification(verification); err != nil {
+		t.Fatal(err)
+	}
+	verification.VerifierRunID = verification.ProducerRunID
+	if err := workdomain.ValidateIndependentVerification(verification); err == nil {
+		t.Fatal("expected same-run rejection")
+	}
+}