v0.17.3 - fix flaky link path filter

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: networmix

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.17.3] - 2026-02-02
+
+### Fixed
+
+- Link path filter now uses deterministic `{source}|{target}` instead of full link ID
+
 ## [0.17.2] - 2026-02-02
 
 ### Changed

ngraph/model/failure/generate.py

@@ -77,11 +77,18 @@ def generate_risk_groups(network: "Network", spec: GenerateSpec) -> List[RiskGro
 
     # Apply path filter if specified
     if path_pattern:
-        entities = [
-            (eid, entity, attrs)
-            for eid, entity, attrs in entities
-            if path_pattern.match(eid)
-        ]
+        if spec.scope == "node":
+            entities = [
+                (eid, entity, attrs)
+                for eid, entity, attrs in entities
+                if path_pattern.match(eid)
+            ]
+        else:
+            entities = [
+                (eid, entity, attrs)
+                for eid, entity, attrs in entities
+                if path_pattern.match(f"{attrs['source']}|{attrs['target']}")
+            ]
 
     # Group by attribute value
     groups: Dict[Any, List] = defaultdict(list)

ngraph/model/failure/membership.py

@@ -186,7 +186,11 @@ def _select_entities(
         }
         # Start with all or path-filtered IDs
         if path_pattern:
-            candidate_ids = {eid for eid in entity_attrs if path_pattern.match(eid)}
+            candidate_ids = {
+                eid
+                for eid, attrs in entity_attrs.items()
+                if path_pattern.match(f"{attrs['source']}|{attrs['target']}")
+            }
         else:
             candidate_ids = set(entity_attrs.keys())
 

ngraph/model/failure/policy.py

@@ -255,7 +255,16 @@ def _match_scope(
         # Apply path filter if specified
         if rule.path:
             pattern = re.compile(rule.path)
-            candidates = {eid for eid in candidates if pattern.match(eid)}
+            if rule.scope == "link":
+                candidates = {
+                    eid
+                    for eid in candidates
+                    if pattern.match(
+                        f"{network_links[eid]['source']}|{network_links[eid]['target']}"
+                    )
+                }
+            else:
+                candidates = {eid for eid in candidates if pattern.match(eid)}
 
         return candidates
 

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 # ---------------------------------------------------------------------
 [project]
 name = "ngraph"
-version = "0.17.2"
+version = "0.17.3"
 description = "A tool and a library for network modeling and analysis."
 readme = "README.md"
 authors = [{ name = "Andrey Golovanov" }]