sendInput() typed the text of a text+Enter pair with `send-keys -l` and
sent Enter 50 ms later. Codex detects an unmarked paste from a fast
character burst and folds an Enter inside that window into the paste as a
newline, so the prompt stays in the composer unsubmitted. Measured with
codex-cli 0.162.1 in a throwaway tmux pane: 1505 chars stuck 3/3 as
`[Pasted Content 1506 chars]`, a 98-char line stuck 1/4. SubmitVerifier
re-presses Enter for the short case, but it cannot match the long one: the
composer shows the placeholder instead of the prompt's head.
The text now goes in via set-buffer + `paste-buffer -p -d` (markers only
when the pane requested bracketed paste), followed by the separate Enter as
before. Same pane, same texts: 4/4 and 3/3 submitted. Each send gets its
own named buffer; a paste that fails (pane or server gone) deletes it,
since tmux never trims named buffers on its own.
Also escapes a trailing `;` in the text, which tmux treats as a command
separator (`send-keys -l 'x;'` typed `x`, a lone `;` typed nothing).
sendInputToPane() has no callers in src/ and is left as it was.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude Code 2.1.277 takes typed text the moment its composer paints but
ignores Enter for the first 30 to 50 seconds after it (measured 2026-09-19
through the input route: an Enter at 28 s stranded the prompt, one at 51 s
submitted it). The text+Enter pair `sendInput` sends 50 ms apart therefore
left every programmatic prompt sitting unsent, and every waiter burned its
timeout on a turn that never started.
Server: `SubmitVerifier` (session-submit-verifier.ts), armed from
`writeViaMux` for every mux write that carried a carriage return, reads the
pane on a 2 s to 60 s schedule and re-sends Enter only while the last
composer line (the CLI's own prompt glyph) still holds the head of what was
sent. An empty composer, other text, or no composer line at all ends it; a
newer write replaces the schedule.
Skill: `sendwait` gets the same loop (`_composer_text`, no-break space
stripped by its bytes for BSD sed) for servers that predate this, and the
preamble version moves to 1.30.1 so seeded agents pick up the fresh copy.
SKILL.md's heredoc and the plugin mirror are regenerated.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
