unsloth/studio
Daniel Han 2db8b81854 Studio: harden re-prompt artifact regex for CRLF + catastrophic backtracking
Two robustness fixes for the `_HAS_ANSWER_ARTIFACT` regex from the
parent commit, both caught by a thorough simulation suite covering
Linux/Mac/Windows line-ending portability and adversarial inputs.

1. **CRLF line endings.** The original `\n` literals missed Windows-
   authored or CRLF-converted content (model echoing a pasted prompt,
   etc.). Replaced with `\r?\n` everywhere a newline is required, so
   closed code fences, numbered lists, and end-to-end re-prompt
   decisions all work on `\r\n` as well as `\n`.

2. **Catastrophic backtracking on whitespace spam.** The numbered-list
   alternative `(?:^|\r?\n)\s*\d+\.\s+\S.*?\r?\n\s*\d+\.` was
   O(n^2) on long whitespace runs: `\s*` greedy + `\d+` failing +
   `\s` matching `\r\n` led to repeated backtracking through the
   newline characters. Measured at ~630ms for 10KB of `\r\n` repeats.
   Fix: restrict the post-newline indent to `[ \t]*` (spaces / tabs
   only). After `\r?\n` we are at column 0 and only spaces / tabs
   are a sensible leading indent for a list item; greedy whitespace
   was never needed. New worst case on the same input: <1ms (1000x
   speedup).

Added 5 in-tree tests:
  - test_artifact_regex_handles_crlf_code_fence
  - test_artifact_regex_handles_crlf_numbered_list
  - test_artifact_regex_handles_mixed_lf_crlf
  - test_no_backtrack_on_crlf_spam (asserts <50ms on 10KB \r\n)
  - test_no_reprompt_on_crlf_complete_python_game

All 18 reprompt-guard tests pass. All 253 llama_cpp-related tests pass.
Out-of-tree simulation suite (84 tests) passes on both Python 3.12 and
Python 3.13 inside isolated uv venvs.
2026-05-23 14:00:39 +00:00
..
backend Studio: harden re-prompt artifact regex for CRLF + catastrophic backtracking 2026-05-23 14:00:39 +00:00
frontend ci: unblock Studio Windows + Linux + Mac smoke (#5741) 2026-05-23 06:59:16 -07:00
src-tauri Fix Windows workflow issues(#5694) 2026-05-22 05:32:30 -07:00
__init__.py Final cleanup 2026-03-12 18:28:04 +00:00
install_llama_prebuilt.py ci: unblock Studio Windows + Linux + Mac smoke (#5741) 2026-05-23 06:59:16 -07:00
install_python_stack.py ci: unblock Studio Windows + Linux + Mac smoke (#5741) 2026-05-23 06:59:16 -07:00
LICENSE.AGPL-3.0 Add AGPL-3.0 license to studio folder 2026-03-09 19:36:25 +00:00
package-lock.json ci: advisory lockfile supply-chain audit (no install-script changes) (#5604) 2026-05-19 05:56:56 -07:00
package.json ci: advisory lockfile supply-chain audit (no install-script changes) (#5604) 2026-05-19 05:56:56 -07:00
setup.bat Final cleanup 2026-03-12 18:28:04 +00:00
setup.ps1 studio: regenerate desktop launcher on unsloth studio update (macOS + Linux + Windows) (#5577) 2026-05-19 05:49:10 -07:00
setup.sh Route CPU-only Linux x86_64 to ggml-org/llama.cpp prebuilts (#5302) 2026-05-05 23:22:22 -07:00
Unsloth_Studio_Colab.ipynb studio: add --local to setup.sh + overlay unsloth-zoo from git main (#5252) 2026-05-02 08:51:56 +04:00