Fix knowledge index case collision

Author: JRS1986

.gitignore

@@ -1,5 +1,7 @@
 .venv/
 .coding-scaffold/
+.claude/settings.local.json
+.claude/worktrees/
 __pycache__/
 *.py[cod]
 .pytest_cache/

src/coding_scaffold/adapters.py

@@ -346,8 +346,8 @@ def _codex_agents_md(routing: dict[str, object]) -> str:
 
 ## Knowledge
 
-Start with `.coding-scaffold/knowledge/index.md` or `.coding-scaffold/knowledge/INDEX.md` when it
-exists. Curated wiki pages are preferred over raw notes.
+Start with `.coding-scaffold/knowledge/INDEX.md` when it exists. Curated wiki pages are preferred
+over raw notes.
 """
 
 

tests/test_golden_outputs.py

@@ -12,13 +12,17 @@ def test_adapter_output_paths_match_golden(tmp_path) -> None:
     for tool in ("opencode", "claude-code", "codex"):
         write_tool_adapter(tmp_path, tool)
 
-    assert _file_list(tmp_path) == _golden_lines("adapter_paths.txt")
+    paths = _file_list(tmp_path)
+    assert _casefold_collisions(paths) == {}
+    assert paths == _golden_lines("adapter_paths.txt")
 
 
 def test_knowledge_output_paths_match_golden(tmp_path) -> None:
     write_knowledge_base(tmp_path)
 
-    assert _file_list(tmp_path) == _golden_lines("knowledge_paths.txt")
+    paths = _file_list(tmp_path)
+    assert _casefold_collisions(paths) == {}
+    assert paths == _golden_lines("knowledge_paths.txt")
 
 
 def test_setup_output_paths_match_golden(tmp_path, capsys) -> None:
@@ -30,6 +34,7 @@ def test_setup_output_paths_match_golden(tmp_path, capsys) -> None:
         for path in _file_list(tmp_path)
         if path.startswith(".coding-scaffold/") or path.startswith(".opencode/") or path == "opencode.json"
     ]
+    assert _casefold_collisions(generated) == {}
     assert generated == _golden_lines("scaffold_paths.txt")
 
 
@@ -39,3 +44,10 @@ def _file_list(root: Path) -> list[str]:
 
 def _golden_lines(name: str) -> list[str]:
     return (GOLDEN / name).read_text(encoding="utf-8").splitlines()
+
+
+def _casefold_collisions(paths: list[str]) -> dict[str, list[str]]:
+    grouped: dict[str, list[str]] = {}
+    for path in paths:
+        grouped.setdefault(path.casefold(), []).append(path)
+    return {key: values for key, values in grouped.items() if len(values) > 1}