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fix(terminal): the held-input notice shows only text to send, not a count of dropped keys - #561
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…ount of dropped keys Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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WalkthroughTerminal drafts ignore control input and hold up to 1,024 characters. If a printable chunk exceeds the limit, the draft rejects it and records truncation. The reconnect preview reports omitted input instead of counting dropped special keys. ChangesTerminal draft behavior
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: ⚪ Minimal · up to The change preserves printable paste text and makes input omitted by the holding limit visible in the draft preview. No actionable merge-blocking issue is established. Security Architecture ReviewSecurity architecture risk: ⚪ Minimal · up to Held terminal input remains tied to its pane and requires an explicit Send action. The updated saved-draft format and omission notice do not introduce a material security risk in the reviewed paths. Retained concerns Security review detailsSecurity Blast Radius
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Review comments at @src/lib/draft.ts:
- Around line 20-31: Update applyToDraft to recognize and remove complete
bracketed-paste framing before validating and appending its printable text, and
apply MAX_DRAFT_CHARS to the unwrapped text. Continue rejecting unframed
terminal reports and other non-printable input.
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CHANGELOG.mdsrc/components/PaneTerminal.csssrc/components/PaneTerminal.tsxsrc/lib/draft.test.tssrc/lib/draft.tssrc/lib/i18n.ja.tssrc/lib/i18n.ko.tssrc/lib/i18n.zh.ts
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- src/components/PaneTerminal.css
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The count this PR removes was also the only sign of text past the draft's 1,024 characters. That loss is now told by itself, also when nothing else is held. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…d by its text xterm hands a paste on as one chunk between bracketed-paste frames, and the frames are controls: the whole paste was left out, and since the count of dropped keys is gone, without a word. The text between the frames is what the user gave, so that is what is held, under the same rules as typing; a paste of several lines holds controls of its own and is left out as before (CodeRabbit). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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…input (#956) ## Problem In direct typing, input the terminal cannot take yet (socket down, or the pane not input-ready after a phone resume) is held for review in the "Input held until the terminal is ready" banner. The held text did not match what was typed: - `lss`, Backspace, ` -la` was held as `lss -la`: the deleted character came back. - `ls`, Enter, `pwd` was held as `lspwd`. - A multi-line paste, raw (`a\rb`) or bracketed (`\x1b[200~a\nb\x1b[201~`), vanished whole with no notice. ## Cause `applyToDraft` (src/lib/draft.ts) kept a chunk only if it held no C0/C1 control at all and otherwise returned the draft unchanged with no flag. DEL, BS, CR and LF were all treated like arrows and xterm's automatic reports. ## Fix - A leading run of DEL / BS in a chunk deletes that many code points from the held text (`Array.from`, so an emoji or Hangul syllable is never split). Text after the deletions in the same chunk is folded in as usual. - A chunk (or the inside of a bracketed paste) with CR/LF keeps its text, with a single space where each run of line breaks was, and sets a new `leftOut` flag. The held text never contains a line break, so Send still never presses Enter. - The banner shows a new notice when `leftOut` is set: "An Enter or line break was left out: Send never presses Enter." (ko/ja/zh, and tr since that locale lists the neighbouring strings). `draftIsEmpty` counts the flag, and `restoreDraft` reads it back (anything but `true` reads as false, so older records restore unchanged). - An Enter or a run of line breaks with no text held changes nothing (no empty notice, nothing stored). - A tab inside a bracketed paste is held as a space (a typed Tab stays out: it is completion). A paste, or a multi-line chunk, that still has other controls sets `truncated` as well, so the notice says text was left out instead of implying it was kept. - Once `truncated` is set, Backspace no longer edits the held text: it may be meant for the chunk that was dropped. - Other typed controls (arrows, Tab, Ctrl keys, CPR/focus/mouse reports) stay silent, as before. ## Tests - `src/lib/draft.test.ts`: `ab` + `\x7f` -> `a`; `\b` likewise; empty + `\x7f` -> unchanged; surrogate/Hangul deletion; `\x7f\x7f\x7fthe` replaces; `ls`,`\r`,`pwd` -> `ls pwd` + `leftOut`; `a\rb` and `\x1b[200~a\nb\x1b[201~` -> `a b` + `leftOut`; restore of the flag; bare Enter / empty paste -> `EMPTY_DRAFT`; bracketed `a\tb` -> `a b`; raw `a\tb\nc` and bracketed `a\x1bb` -> `truncated`; Backspace after a loss keeps the held text. - `scripts/terminal-input-regression.ts` (via `ui-regression.ts`): in the not-ready state, a bare Enter shows no left-out notice, `b` + Backspace removes the `b`, Enter after text shows the notice, and after reload both the held text (`a `) and the notice are back; Send sends `a `. - Ran: `bun run typecheck` (pass), `HERDR_TEST_MODE=unit bun test ./src/lib/draft.test.ts` (23 pass; 5 fail on the first commit's draft.ts), `bun run test:unit` (3076 pass, 0 fail), `bun run build` + `bun run check run bun scripts/ui-regression.ts` (all PASS). ## Notes - Design choice: the space where a line break was is a character the user never typed. It keeps `ls` Enter `pwd` readable as two words instead of `lspwd`, and the notice says a break was left out. The alternative (keep `\n` in the draft and have Send deliver it as a bracketed paste) was not taken: it changes what Send writes and depends on the program's paste mode. - A lone Enter with nothing held shows nothing, as before. The flag is for Enter/line breaks only, not the "special keys dropped" count that was removed earlier (#561). - Known limits, left out on purpose (the banner shows the held text before Send): Backspace right after a break deletes the space that stands for it (fixing it needs new stored state); arrows that move the cursor, Ctrl+U, Ctrl+W, Alt+Backspace and Cmd+Backspace are not followed; a chunk with DEL after text is dropped whole; a raw single-line chunk with a control is still dropped silently, since it cannot be told from typing. The changelog names only the Backspace key. - Overlap: #951 reworks the held-input banner into an activity row and reads `draft.truncated` there. Whichever merges second needs to carry the `leftOut` notice into the new row. No open PR touches `src/lib/draft.ts`. - Source: mobile-terminal stability audit finding input-3. ## Merge-session review Fixed in ca92b54: - Medium: a typed ESC CR (physical Shift+Enter or Alt+Enter) went through the line-break branch and set both `truncated` and `leftOut`, so the draft showed the "too long" notice and later Backspace stopped editing it. A typed chunk containing ESC is now treated as a key sequence again: neither held nor told. Tests: `\x1b\r` / `\x1b\n` -> `EMPTY_DRAFT`; `ls`, `\x1b\r`, `\x7f`, `x` -> `lx` with no flags (both failed at f9b902c). - Low: Backspace that erased all held text kept `leftOut`, leaving an empty banner with only the line-break notice (and saving it). Erasing everything held now returns the empty draft. Test: `ls`, `\r`, three `\x7f` -> `EMPTY_DRAFT` (failed at f9b902c). - Low: the truncated notice blamed length even when a paste with control characters set it. The string is now "Some input could not be held and was left out." in en/ko/ja/zh/tr; `src/lib/i18n.test.ts` checks every locale has it. The changelog fragment was updated to match. Deferred: - Coordination with #968 (stacked on #967): on restack after this PR merges, #968's `eraseFromDraft` expectations need `leftOut: false`, its Backspace erase should reuse this PR's ERASE path instead of a second implementation, and `heldInputAction` must check line breaks and ESC CR before its `applyToDraft(...) !== EMPTY_DRAFT` "hold" test if blocking stays the contract (update src/AGENTS.md to match). Its existing `"line1\nline2"` / `"\x1b\r"` -> `block` tests catch a naive merge. Not a defect in this PR alone. - #951 overlap: the truncated notice's English key changed, so whichever of #951 and this PR merges second must use the new key. Checks: `bun run check fast` (typecheck, build, 3078 unit pass), `CI=1 bun run check run --build bun scripts/terminal-input-regression.ts` (PASS). 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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What
The terminal's Input held until the terminal is ready notice showed "— 145 special keys dropped" on a pane where nothing had been typed. The notice now appears only when there is text to send or discard, and the count is gone.
Why
While a pane cannot take input (disconnected, or its attach still opening), every
onDatachunk goes to the draft (src/lib/draft.ts). Printable text is held for the user to send or discard. Everything else was counted as a "special key dropped" and the count alone kept the notice up, with a dash where the text would be and a Send button that could not be pressed.onDatais not only keys: xterm answers a program through it by itself (cursor position, focus and mouse reports). So the count rose with no key pressed, and a number such as 145 told nothing a person could act on. A chord the terminal cannot take is already told on its own ("Not sent: the terminal is not ready for keys.").How
InputDraftis its text and whether text was left out for length.applyToDraftleaves out a chunk with controls without counting it..draft-droppedare removed.Unchanged: nothing typed is sent automatically, and held text is never replayed without Send.
Review
Codex adversarial review (gpt-6.1-sol, xhigh) on 1c28de1: one Medium and one Low, both confirmed and fixed in 35fc209.
docs/terminal-input.mdstill said control sequences are counted. Rewritten.Tests
src/lib/draft.test.ts: special keys and xterm's own reports (cursor position, focus, mouse) hold nothing and leave the draft empty; the cap and the loss it tells, for typing and for one chunk; a loss that stays told; IME commits.bun run check fastpasses (1,671 unit tests, typecheck, build).🤖 Generated with Claude Code