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Pre-existing diagnostics below an edit point used to surface as 'LSP diagnostics introduced by this edit' whenever the edit deleted or inserted lines. The delta-filter key included the diagnostic's range, so the same logical error reported at a different line in the post-edit snapshot looked like a brand new diagnostic. Concrete case: deleting 14 lines in cli.py caused Pyright errors at lines 9873, 10590, 12413, 13004 (unrelated to the edit) to be reported as introduced by it. Fix: build a piecewise-linear line-shift map (via difflib's SequenceMatcher) from pre and post content, and remap baseline diagnostics into post-edit coordinates before the set-difference. Diagnostics in deleted regions drop out cleanly; diagnostics below the edit shift by the right amount; diagnostics above are untouched. The strict (range-aware) equality key stays — so a genuinely new instance of an identical error class at a different line still surfaces as new. Pieces: - agent/lsp/range_shift.py — build_line_shift, shift_diagnostic_range, shift_baseline. Pure functions, no LSP state. - agent/lsp/manager.py — LSPService.get_diagnostics_sync gains an optional line_shift kwarg; baseline is shift_baseline'd before computing the seen-set. _diag_key keeps the strict range key. - tools/file_operations.py — write_file captures pre_content for any LSP-handled extension (not just LINTERS_INPROC) and passes pre/post to _maybe_lsp_diagnostics, which builds the shift map. - New _lsp_handles_extension helper guards the pre_content read. Trade-offs preserved: - Genuinely new same-class errors at different lines still surface (content-only key would have swallowed them). - Pre-existing errors at unshifted positions still get filtered (covered by the strict-key path with no shift). - Best-effort: when pre_content can't be captured (file didn't exist, permissions), the unshifted comparison still catches most pre-existing errors; the edge case it misses is a new file with a non-empty baseline, which is structurally impossible. |
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| .. | ||
| __init__.py | ||
| cli.py | ||
| client.py | ||
| eventlog.py | ||
| install.py | ||
| manager.py | ||
| protocol.py | ||
| range_shift.py | ||
| reporter.py | ||
| servers.py | ||
| workspace.py | ||