docs: remove personal paths and false co-authorship before release

The repo carries an open task to publish it, and docs/ leaked things a clone
could neither use nor should see.

Absolute paths under one user's home become the repo root, a home-relative
path, or a named variable, so the snippets stay runnable for anyone. The
testinfra example takes its user from an env var instead of hardcoding one.

References into a private sibling project and into the gitignored tooling
directory are replaced by what they mean; as written they were dead links in
any clone but the author's.

Five documents claimed a co-author who is not a person. An #+AUTHOR line
survives conversion into docx, a wiki page, or a PDF, so it is worth being
exact about: these documents have one author.

1 files changed, 5 insertions, 3 deletions

diff --git a/docs/design/2026-06-25-testinfra-validation.org b/docs/design/2026-06-25-testinfra-validation.org
index 5c82aa2..0f81231 100644
--- a/docs/design/2026-06-25-testinfra-validation.org
+++ b/docs/design/2026-06-25-testinfra-validation.org
@@ -106,16 +106,18 @@ scripts/testing/tests/
 
 ** Example tests (parity)
 #+begin_src python
+TEST_USER = os.environ.get("ARCHSETUP_TEST_USER", "archie")
+
 def test_ufw_enabled(host):
     assert host.service("ufw").is_enabled
 
-def test_user_cjennings_exists(host):
-    u = host.user("cjennings")
+def test_primary_user_exists(host):
+    u = host.user(TEST_USER)
     assert u.exists
     assert u.shell == "/usr/bin/zsh"
 
 def test_zshrc_stowed_and_readable(host):
-    f = host.file("/home/cjennings/.zshrc")
+    f = host.file(f"/home/{TEST_USER}/.zshrc")
     assert f.is_symlink
     assert ".dotfiles/" in f.linked_to
     assert f.exists                       # not broken