TmuxManager.sendInput() removed every `\n` before the text reached tmux, so a
multi-line prompt sent with `useMux` (or a multi-line respawn prompt) arrived as
one line with its lines run together: `"echo A\necho B\r"` ran `echo Aecho B`.
The text half of a submit has gone in as one bracketed paste
(buildPasteTextCommands) since the Codex paste-burst fix, and inside the paste
markers Claude Code and Codex insert a pasted line break into the composer
instead of submitting. So the `\n` is now kept (`\r\n` loses only its `\r`) and
the existing paste carries the lines; the Enter stays a separate tmux call.
Multi-line text without an Enter is pasted too rather than typed with
`send-keys -l`, where every line break would reach the pane as a key.
Single-line input is unchanged.
The test-mode gate moves from the top of sendInput() into inputRunner(), as
readPaneRows() does, so a test subclass can record the commands sendInput()
would run instead of pinning the branch shapes on the source.
SubmitVerifier still compares the composer's last glyph line with the prompt
minus its newlines, so it does not reliably recognise a multi-line paste and
may not re-press an Enter that Claude Code ignored. `agent send` and the TUI
therefore keep refusing or joining multi-line input; the docs that described
the stripping now describe the paste and that limit.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
A single input over MAX_INPUT_LENGTH (64 KiB) was queued for reliable
delivery, refused by both transports (the WebSocket silently, POST with a
400), and never dropped: the client treated the 400 as transient, so the
frame was re-sent every 2 s forever, blocked every later input for that
session, and came back from localStorage on every reload.
- Client: a paste over the frame limit is split into in-limit frames
(never cutting a surrogate pair) delivered in seq order; over 1 MiB, or
an oversized mux write, it is refused with a toast and never queued.
- Client: the POST drain drops a frame answered 400/413; a WS error ACK
drops it too; frames over the limit persisted by an older build are
pruned on load.
- Server: the WebSocket answers an oversized sequenced frame with
{t:'ia',seq,err:'too_large',max} instead of silence (an older client
reads that as a plain ACK and drops it); the POST schema uses
MAX_INPUT_LENGTH instead of a second 100000 limit.
Verified end to end on an isolated instance: a 110 KB paste reached the
PTY byte-identical over both the WebSocket and the POST path, a poisoned
120 KB persisted frame was pruned on load, and a 2 MB paste showed the
refusal toast with nothing queued.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Three behaviours landed from #375 without their doc entries: the
duplicate input ACK now carries `dup:true` and the server's watermark
(`docs/reliable-input-delivery.md` still described a bare ACK), Shift+drag
and right-click copy in the terminal (the shortcut list did not know
them), and one adopted container backing several cases at different
in-container directories (the Docker cases paragraph still implied one
case per container for adopted containers too).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
A "sent" prompt could vanish with no trace on a flaky connection (e.g. a train):
with local echo on, Enter cleared the overlay then sent over the WebSocket
fire-and-forget. On a half-open socket (readyState===OPEN, dead TCP) ws.send()
doesn't throw, so the frame was silently discarded, nothing was enqueued, and
navigator.onLine stayed true — the prompt was lost and never resent.
Replace the best-effort offline queue with a durable, acknowledged delivery layer:
- Client (app.js): every input frame is recorded with a stable clientId +
monotonic per-session seq and persisted to localStorage BEFORE delivery, and
only dropped on a server ACK. Delivered over WS (acked via {t:'ia',seq}) or,
when the socket is down, POST in seq order (HTTP 2xx = ACK). A 2s sweep
force-reconnects a WS whose oldest frame is unacked past 4s (half-open sockets
never recover on their own); on reconnect/reload all pending frames re-deliver.
Survives reconnects AND page reloads. Connection indicator shows pending count.
- Server: Session.shouldApplyInput(clientId, seq) applies each frame exactly once
(bounded MRU map); ws-routes + POST /input dedup a redelivered seq but still ACK
it (200 / {t:'ia'}), so an at-least-once resend can never type the prompt twice.
Untagged input (curl/legacy) applies unconditionally — no behavior change.
- terminal-ui.js sendInput() (voice / keyboard-accessory / paste) now routes
through the same durable layer.
Tests: test/reliable-input-dedup.test.ts (exactly-once semantics on the real
Session) + POST /input dedup route tests. Design: docs/reliable-input-delivery.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
