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fix(pty): keep the controlled prompt so persistent bash settles fast

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tool-bash-persistent overwrote the backend's PS1, so terminal-bash prompt
readiness never matched and every send degraded to the 3.5s silence tier
(idleSilenceMs + handoffGraceMs) under production defaults.

The controlled PROMPT_COMMAND now re-asserts PS1 before every prompt, so an
in-shell override never survives to the next prompt. The tool initializes
with stty -echo alone and detects the no-end-marker fallback through the
seam's stdin_read wait reason instead of matching its own prompt text.

Tool calls drop from 7180/3560/3566 ms to 355/88/91 ms (spawn+init+echo,
echo, pwd; darwin, production defaults). The loader composition suite now
pins the fast path by pushing idleSilenceMs beyond the send bound, and a
real-PTY case proves PS1 self-healing.

Fixes #2585
This commit is contained in:
Yichen Jiang
2026-08-15 11:06:57 +08:00
parent 5bb600f9fb
commit a8dc6f9776
18 changed files with 145 additions and 40 deletions
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4
packages/shell/tool-bash-persistent/README.i18n.yaml
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@@ -2,5 +2,5 @@
# side as of the last confirmed-consistent state. Both languages carry equal authority;
# after editing either side, bring the other along and re-record with:
# pnpm run verify-translation-pairing --write packages/shell/tool-bash-persistent/README.md
README.md: 37c259443cba566350d8ec7963857d5f6ce7396c
README.zh.md: 8f3cf4e4d20aad1537b48644cee1a9d5706f4b3c
README.md: 606920d087b42344f34b70103e167b0046d3cfd5
README.zh.md: dd88db87cb617fb2f4d35ada9550d0142e32e979