[NopeCharon]

What and why

Fixes #281. Git patch lines are delimited by LF. Python's splitlines() also splits form feeds, vertical tabs and Unicode separators that belong inside a source line, producing truncated text, phantom changes and incorrect line numbers in the Work diff canvas.

The parser now splits only on LF and retains its existing CRLF display handling. The Host's new-file patch generator uses the same LF framing, preserves empty/trailing blank lines and emits the missing-final-newline marker based on LF. Final Git-delta assembly no longer strips source whitespace from the last patch line.

Owning layers: server/unified_diff.py and server/work_artifact_registry.py. Existing output schemas, permissions and attribution rules are unchanged. The generator is shared by Git-untracked files and new files in non-Git workspaces.

Change class

• Routine bug fix with regression coverage
• Product-semantic or public-contract change
• Isolated experiment

Evidence

• The author's parser regression and real Git examples demonstrate the original count/text corruption.
• Eight generator-to-parser cases cover embedded separators, other control characters, empty files, blank/trailing blank lines, CRLF, missing final LF and bare CR.
• Three end-to-end attempt cases cover Git-tracked, Git-untracked and filesystem-new files, including trailing form-feed/space preservation.
• New regressions were observed failing before their corresponding fixes.
• On Windows/Python 3.12.10, python -X utf8 -m pytest tests/test_local_git_provider_diff.py tests/test_work_artifact_registry.py tests/test_unified_diff_canvas.py tests/test_work_export_integration.py -q: 61 passed on head 9b8bbe869901b53ca707eb1486a721b0218d1ade, including merged fix(work): pin the format of patches the Host parses #284 and fix(work): keep spaced paths from diff headers in the attempt diff canvas #282.
• Ruff on all four changed files and git diff --check: passed.
• No live provider calls or local Electron journey were needed for this parser/generator change; hosted checks cover the broader application.

Final check

• One coherent content-preservation fix
• No new dependency, schema, fallback or public configuration
• No secrets, personal state or restricted assets
• CPU/model-less baseline retained

[Lucas1479]

Thank you for the focused parser fix and regression coverage. I have completed the same line-framing invariant in the Host-generated new-file patch path and added eight generator-to-parser cases plus three full attempt cases. Those tests also exposed final Git-delta .strip() removing trailing source characters; that trim is now removed. The regressions were observed failing before their fixes. The final composition with #284 and #282 passes all 61 relevant tests on Windows, plus Ruff and diff checks. The updated implementation is on 9b8bbe869901b53ca707eb1486a721b0218d1ade; waiting for its hosted CI before squash merge.