Folds incremental-search-framing.md (#70) and regex-search-framing.md
into a single in-buffer-search-framing.md that records the design as
shipped, and removes the two superseded docs. The incremental doc in
particular described the C-f + minibuffer-hosted plan that never
shipped (C-s/C-r + a dedicated core SearchSession did), which was
actively misleading.
The consolidated doc adds an "As-built divergences" section capturing
the four places implementation departed from the framing passes:
C-f → C-s/C-r (veto resolved), minibuffer-hosted → frontend-agnostic
core mode (the GUI has no minibuffer), regex deferred → shipped, and
single-line substring → multi-line regex wash.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
