The headless bench stubbed _send_sbx_input to a no-op, so run_shell
commands were staged to /tmp/.hh_*.cmd but the typed wrapper never ran —
the rc/out poll timed out and any shell-dependent task FAILed (mkdir+list
burned ~248s then failed). Make the stub run typed input in the bench
process (CWD == workdir), faithfully standing in for the room PTY, so
_run_shell_in_pty (staging/poll/cleanup) is exercised end-to-end.
Result: 3/3 pass. Surfaced a separate model-side argument leak in
script+run (tool JSON-schema dict passed as the command) — fixed next.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
First functional bench run crashed 0/3 on two latent bench-only bugs:
(1) the Phase-4 token-count change made complete_with_tools return
(text, calls, usage), but the bench preflight still unpacked 2 values;
(2) make_bridge never stubbed _send_sbx_input, so the PTY-mirror
visibility feature hit ws=None and raised AttributeError on every tool
call. Stub it to capture mirrored lines for --verbose.
After the fix: 2/3 pass (write+read, script+run). mkdir+list still
fails — local-backend run_shell CWD divergence + 3B model churn, not a
working-memory regression.
Sprint: native-harness-working-memory (bench) — see also 46e5620, dc6317f, c83abbe
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Display-mirror hybrid (docs/plan-harness-visibility.md §2): native tool
calls now show up in the shared sandbox terminal again via inert `# `-
prefixed comment lines (comment-prefix = anti-double-run/anti-escape),
mirroring only each command. Chat de-flooded to opener + final summary.
write_file mkdir -p parent dir so relative/absolute paths both work
(fixes the regression where script creation silently failed). ui.rs
fmt_line returns Vec<Line> splitting on \n so multi-line agent output
renders as an indented block instead of one garbled row.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
leetcrypt