diff --git a/apps/api/src/services/agent_market_governance_snapshot.py b/apps/api/src/services/agent_market_governance_snapshot.py
index d2e93088..13738f97 100644
--- a/apps/api/src/services/agent_market_governance_snapshot.py
+++ b/apps/api/src/services/agent_market_governance_snapshot.py
@@ -16,8 +16,9 @@ from pathlib import Path
 from typing import Any
 from zoneinfo import ZoneInfo
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "agent_market_governance_snapshot_*.json"
 _MARKET_WATCH_WORKFLOW = ".gitea/workflows/agent-market-watch.yaml"
 _TAIPEI_TZ = ZoneInfo("Asia/Taipei")
diff --git a/apps/api/src/services/ai_agent_automation_backlog_snapshot.py b/apps/api/src/services/ai_agent_automation_backlog_snapshot.py
index 16fbb77d..f6b72000 100644
--- a/apps/api/src/services/ai_agent_automation_backlog_snapshot.py
+++ b/apps/api/src/services/ai_agent_automation_backlog_snapshot.py
@@ -13,8 +13,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "ai_agent_automation_backlog_*.json"
 _SCHEMA_VERSION = "ai_agent_automation_backlog_v1"
 
diff --git a/apps/api/src/services/ai_agent_automation_inventory_snapshot.py b/apps/api/src/services/ai_agent_automation_inventory_snapshot.py
index 03da5f42..0e78d787 100644
--- a/apps/api/src/services/ai_agent_automation_inventory_snapshot.py
+++ b/apps/api/src/services/ai_agent_automation_inventory_snapshot.py
@@ -12,8 +12,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "ai_agent_automation_inventory_snapshot_*.json"
 _SCHEMA_VERSION = "ai_agent_automation_inventory_snapshot_v1"
 
diff --git a/apps/api/src/services/backup_dr_readiness_matrix.py b/apps/api/src/services/backup_dr_readiness_matrix.py
index b3b73018..4ee0cf25 100644
--- a/apps/api/src/services/backup_dr_readiness_matrix.py
+++ b/apps/api/src/services/backup_dr_readiness_matrix.py
@@ -12,8 +12,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "backup_dr_readiness_matrix_*.json"
 _SCHEMA_VERSION = "backup_dr_readiness_matrix_v1"
 
diff --git a/apps/api/src/services/backup_dr_target_inventory.py b/apps/api/src/services/backup_dr_target_inventory.py
index dccf78ac..eb981abd 100644
--- a/apps/api/src/services/backup_dr_target_inventory.py
+++ b/apps/api/src/services/backup_dr_target_inventory.py
@@ -12,8 +12,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "backup_dr_target_inventory_*.json"
 _SCHEMA_VERSION = "backup_dr_target_inventory_v1"
 
diff --git a/apps/api/src/services/backup_notification_policy.py b/apps/api/src/services/backup_notification_policy.py
index 55865654..b0a993d9 100644
--- a/apps/api/src/services/backup_notification_policy.py
+++ b/apps/api/src/services/backup_notification_policy.py
@@ -14,8 +14,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "backup_notification_policy_*.json"
 _SCHEMA_VERSION = "backup_notification_policy_v1"
 
diff --git a/apps/api/src/services/dependency_drift_check_plan.py b/apps/api/src/services/dependency_drift_check_plan.py
index f301dbc4..41d6b9b7 100644
--- a/apps/api/src/services/dependency_drift_check_plan.py
+++ b/apps/api/src/services/dependency_drift_check_plan.py
@@ -14,8 +14,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "dependency_drift_check_plan_*.json"
 _SCHEMA_VERSION = "dependency_drift_check_plan_v1"
 
diff --git a/apps/api/src/services/dependency_risk_policy.py b/apps/api/src/services/dependency_risk_policy.py
index a43a2b60..0f926740 100644
--- a/apps/api/src/services/dependency_risk_policy.py
+++ b/apps/api/src/services/dependency_risk_policy.py
@@ -14,8 +14,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "dependency_risk_policy_*.json"
 _SCHEMA_VERSION = "dependency_risk_policy_v1"
 
diff --git a/apps/api/src/services/dependency_upgrade_approval_package_template.py b/apps/api/src/services/dependency_upgrade_approval_package_template.py
index 38893bc7..1e2e0b0c 100644
--- a/apps/api/src/services/dependency_upgrade_approval_package_template.py
+++ b/apps/api/src/services/dependency_upgrade_approval_package_template.py
@@ -15,8 +15,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "dependency_upgrade_approval_package_template_*.json"
 _SCHEMA_VERSION = "dependency_upgrade_approval_package_template_v1"
 
diff --git a/apps/api/src/services/docker_build_surface_inventory.py b/apps/api/src/services/docker_build_surface_inventory.py
index de8e8f04..64c10280 100644
--- a/apps/api/src/services/docker_build_surface_inventory.py
+++ b/apps/api/src/services/docker_build_surface_inventory.py
@@ -11,8 +11,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "docker_build_surface_inventory_*.json"
 _SCHEMA_VERSION = "docker_build_surface_inventory_v1"
 
diff --git a/apps/api/src/services/javascript_package_inventory.py b/apps/api/src/services/javascript_package_inventory.py
index 01469e13..b8b3b332 100644
--- a/apps/api/src/services/javascript_package_inventory.py
+++ b/apps/api/src/services/javascript_package_inventory.py
@@ -11,8 +11,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "javascript_package_inventory_*.json"
 _SCHEMA_VERSION = "javascript_package_inventory_v1"
 
diff --git a/apps/api/src/services/package_supply_chain_inventory.py b/apps/api/src/services/package_supply_chain_inventory.py
index b4084c48..734e81ab 100644
--- a/apps/api/src/services/package_supply_chain_inventory.py
+++ b/apps/api/src/services/package_supply_chain_inventory.py
@@ -12,8 +12,9 @@ import json
 from pathlib import Path
 from typing import Any
 
-_REPO_ROOT = Path(__file__).resolve().parents[4]
-_DEFAULT_EVALUATIONS_DIR = _REPO_ROOT / "docs" / "evaluations"
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
 _SNAPSHOT_PATTERN = "package_supply_chain_inventory_*.json"
 _SCHEMA_VERSION = "package_supply_chain_inventory_v1"
 
diff --git a/apps/api/src/services/snapshot_paths.py b/apps/api/src/services/snapshot_paths.py
new file mode 100644
index 00000000..6640ca1a
--- /dev/null
+++ b/apps/api/src/services/snapshot_paths.py
@@ -0,0 +1,32 @@
+"""
+Snapshot path helpers.
+
+Resolve committed documentation snapshot paths across local repo checkouts and
+production API images. In containers, service modules live under
+``/app/src/services`` instead of ``apps/api/src/services``.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+
+def resolve_repo_root(anchor: Path) -> Path:
+    """Resolve the repository root that contains committed docs snapshots."""
+    resolved = anchor.resolve()
+    start = resolved if resolved.is_dir() else resolved.parent
+    for candidate in (start, *start.parents):
+        if (candidate / "docs").is_dir():
+            return candidate
+
+    container_root = Path("/app")
+    if (container_root / "docs").is_dir():
+        return container_root
+
+    parents = list(start.parents)
+    return parents[2] if len(parents) > 2 else start
+
+
+def default_evaluations_dir(anchor: Path) -> Path:
+    """Resolve the default committed evaluations snapshot directory."""
+    return resolve_repo_root(anchor) / "docs" / "evaluations"
diff --git a/apps/api/tests/test_snapshot_paths.py b/apps/api/tests/test_snapshot_paths.py
new file mode 100644
index 00000000..31452b13
--- /dev/null
+++ b/apps/api/tests/test_snapshot_paths.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from src.services.snapshot_paths import default_evaluations_dir, resolve_repo_root
+
+
+def test_resolve_repo_root_supports_monorepo_service_layout(tmp_path):
+    repo_root = tmp_path / "repo"
+    evaluations_dir = repo_root / "docs" / "evaluations"
+    evaluations_dir.mkdir(parents=True)
+    anchor = repo_root / "apps" / "api" / "src" / "services" / "snapshot.py"
+    anchor.parent.mkdir(parents=True)
+    anchor.write_text("", encoding="utf-8")
+
+    assert resolve_repo_root(anchor) == repo_root
+    assert default_evaluations_dir(anchor) == evaluations_dir
+
+
+def test_resolve_repo_root_supports_api_container_layout(tmp_path):
+    app_root = tmp_path / "app"
+    evaluations_dir = app_root / "docs" / "evaluations"
+    evaluations_dir.mkdir(parents=True)
+    anchor = app_root / "src" / "services" / "snapshot.py"
+    anchor.parent.mkdir(parents=True)
+    anchor.write_text("", encoding="utf-8")
+
+    assert resolve_repo_root(anchor) == app_root
+    assert default_evaluations_dir(anchor) == evaluations_dir