fix(transcend): skip repository copies in scratchpads

A scan on the real host offered 4276 candidates, 4253 of them files of two repository copies in one peer's scratchpad. scratch_candidates now walks with os.walk, skips any directory holding .git, roles, plugins, pyproject.toml, package.json or a Makefile, and descends at most one level below a scratchpad; the real scan drops to 59 candidates. test_transcend adds a nested helper that stays, a deeper one and a repository copy that drop out (negative control against the unfiltered scan fails).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/kvb-transcend/SKILL.md

@@ -19,7 +19,9 @@ transcend.py mark --state <same> <path> carried|dropped|later
 scratchpad, every peer session's scratchpad, and the agent homes
 (`~/.claude`, `~/.agents`, `~/.codex`) for skills, commands, agents, hooks
 and rules the skills repository does not ship. It keeps scripts, tests and
-skills, and skips files named like secrets and files over 1 MB. Carried or
+skills at most one directory below a scratchpad, and skips files named like
+secrets, files over 1 MB, and repository copies (a directory holding `.git`,
+`roles`, `plugins`, `pyproject.toml`, `package.json` or a `Makefile`). Carried or
 dropped candidates return only when their content changes; `later` returns
 every time.
 

skills/kvb-transcend/scripts/transcend.py

@@ -22,6 +22,8 @@ SECRET_NAME = re.compile(
     r"(secret|token|credential|passw|auth|\.env$|id_[a-z0-9]+$|\.pem$|\.key$)", re.IGNORECASE
 )
 MAX_BYTES = 1_000_000
+MAX_DEPTH = 1
+REPO_MARKERS = {".git", "roles", "plugins", "pyproject.toml", "package.json", "Makefile"}
 HOME_SOURCES = {
     ".claude/skills": "skill",
     ".agents/skills": "skill",
@@ -74,11 +76,21 @@ def session_names(home: Path) -> dict[str, str]:
 
 def scratch_candidates(root: Path, source: str, owner: str) -> list[dict]:
     found = []
-    for path in sorted(p for p in root.rglob("*") if p.is_file()):
-        kind = file_kind(path)
-        if kind:
-            found.append({"source": source, "owner": owner, "kind": kind, "path": str(path)})
-    return found
+    for current, dirs, files in os.walk(root):
+        here = Path(current)
+        depth = len(here.relative_to(root).parts)
+        if depth and REPO_MARKERS & {*dirs, *files}:
+            dirs.clear()
+            continue
+        if depth >= MAX_DEPTH:
+            dirs.clear()
+        for name in files:
+            kind = file_kind(here / name)
+            if kind:
+                found.append(
+                    {"source": source, "owner": owner, "kind": kind, "path": str(here / name)}
+                )
+    return sorted(found, key=lambda item: item["path"])
 
 
 def shipped(skills_repo: Path) -> set[str]: