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readLine dropped control characters one byte at a time, so for an escape sequence only the ESC byte was removed and its printable tail stayed in the answer. Pressing an arrow key, Home/End or Delete in the `setup` / `auth configure` API-key prompt appended text such as `[D` or `[3~` to the key (masked, so invisible), and a terminal with bracketed paste enabled wrapped a pasted key in `[200~ ... [201~`. The corrupted key then failed as an invalid key or a wrong-prefix validation error. Track ESC / CSI / SS3 state across chunks and drop each sequence whole. Enter and Ctrl-C keep their existing handling.
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| Layer / File(s) | Summary |
|---|---|
Escape-sequence filtering src/lib/prompt.ts, src/lib/prompt.test.ts |
readLine discards two-byte, CSI, and SS3 escape sequences, including sequences split across input chunks. Tests verify retained characters, prompt submission, and raw-mode masking. |
Estimated code review effort: 2 (Simple) | ~10 minutes
Change: Bug fix · Severity of issue fixed: Medium
Merge Risk: 
8d3b5
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This change makes the secret and text prompts drop whole terminal escape sequences instead of leaking their trailing bytes into the entered value. No actionable merge-blocking risk remains.
Pre-merge checks: 
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Check name Status Explanation Resolution Docstring Coverage Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. Write docstrings for the functions missing them to satisfy the coverage threshold. -
Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: dropping complete terminal escape sequences from prompt input. Linked Issues check Issue #482is directly linked and remains open.src/lib/prompt.tsaddsESC/CSI/SS3 state that persists across data chunks. It drops cursor, Delete, Home/End, Ctrl+arrow, bracketed-paste, and Alt-k…Out of Scope Changes check The whole-PR diff changes only src/lib/prompt.tsandsrc/lib/prompt.test.ts. The implementation and tests directly support Issue#482. The diff contains no unrelated product behavior, dependency c…Full details: Linked Issues check
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Explanation
Issue
#482is directly linked and remains open.src/lib/prompt.tsaddsESC/CSI/SS3 state that persists across data chunks. It drops cursor, Delete, Home/End, Ctrl+arrow, bracketed-paste, and Alt-key sequences. Enter and Ctrl-C are checked before escape parsing. The state applies to bothpromptSecretandpromptText.src/lib/prompt.test.tsadds coverage for the required sequences, split chunks, unterminated input, prompt text, and raw-mode masking. No dependency is added.
Full details: Out of Scope Changes check
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Explanation
The whole-PR diff changes only
src/lib/prompt.tsandsrc/lib/prompt.test.ts. The implementation and tests directly support Issue#482. The diff contains no unrelated product behavior, dependency change, or unrelated test coverage.
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Inline comments:
Review comments at @src/lib/prompt.ts:
- Around line 102-104: Update the SS3 handling in the escape-sequence parser so
parameter bytes are retained and consumed through the sequence’s final byte,
matching the CSI parsing behavior instead of resetting immediately after the
first byte. Preserve normal SS3 parsing and add coverage for a parameterized
sequence such as \x1bO1;5P.
- Around line 91-95: Update the escape-state handling around the escape parser
so a second ESC is preserved as the start of a new sequence rather than consumed
as an Alt-key byte, allowing subsequent arrow-key bytes to be discarded
correctly for key\x1b\x1b[D\r. Add a regression test covering this input and the
expected parsed result.
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What's broken
The interactive prompts (
promptSecretfor the API key insetup/auth configure, andpromptText) drop control characters one byte at a time. For a terminal escape sequence, only theESCbyte goes and its printable tail stays in the answer. Pressing Left after pasting the key turnssk-user-abcintosk-user-abc[D. Delete adds[3~, Home addsOH, Ctrl+Right adds[1;5C, and a bracketed paste becomes[200~sk-user-abc[201~. The prompt is masked, so the user can't see any of it, and the key then fails as invalid.How you found it
Reading
src/lib/prompt.ts: the "drop other control chars" branch skipsESC(0x1b) but not the bytes after it. Writing'sk-user-abc\x1b[D\x1b[D\r'intopromptSecretthrough aPassThroughreturns"sk-user-abc[D[D". Confirmed on v0.15.0 by @fyZhang66 in #482.Why it matters
This is the first thing a new user does (
testsprite setup). A correctly copied key is silently changed by a normal keypress, and the error blames the key rather than the input handling.The fix (scope as accepted in #482):
readLine, kept across data chunks, used by bothpromptSecretandpromptText.[200~/[201~paste markers), plus two-byte Alt+key escapes.Tests
src/lib/prompt.test.ts, 7 new tests, all failing onmainand passing with the fix:promptTextis covered too.*is written per kept character only.Rebased on main
d61e6df. Full suite: 4,805 passed, 2 skipped. typecheck, format:check and lint (incl. check-ticket-refs) are clean.Closes #482
Summary by CodeRabbit