User identified the general least-surprise violation beyond the original
error-retention draft: `'set ::jjj blah' | punkexe` reaches an interactive
prompt where ::jjj does not exist - the piped-EOF restart silently swaps in
a fresh codethread/code interp, discarding variables, procs, packages, cwd
and errorInfo. Goal reworked to session continuity via the caller-driven
restart identified during G-036 (repl::start eof-restart done-mode without
codethread teardown; app-punkshell restarts on the reopened console without
repl::init). Error inspectability becomes an acceptance criterion that
likely falls out free (no re-init means no boot-noise re-stamping of
errorInfo); the standalone error-record mechanism is demoted to a recorded
fallback. Detail file renamed to match (slug change, ID preserved).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
