Point docs and comments at the files code moved to

Documentation only, no code change: README's reading order and layout,
docs/design.typ's paragraph on where pane kinds and editor parts live,
docs/helix-keys.md's code map (normalInput and the executors now in
normal.zig and edit.zig, insertTab in edit.zig), docs/open-questions.md
(execute and ttyForDir in exec.zig), and the comments that named pardes.zig
for fold, Cell, takesCommandLine and runBuiltin (tools/gen_themes.zig,
themes/helix.zig, detached/wire.zig, host_io.zig, lsp_zls.zig).
docs/design.pdf is a retained fixture and is not regenerated.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

3 files changed, 18 insertions, 13 deletions

diff --git a/docs/design.typ b/docs/design.typ
index 01b850b9..82bafb49 100644
--- a/docs/design.typ
+++ b/docs/design.typ
@@ -521,13 +521,18 @@ const platform_has_fs = !pardes.isolated and
 the option is comptime, so every libc path below is dead code the compiler
 removes rather than a branch that could be taken by accident.
 
-The core's one `pointerOperand` primitive owns click-word expansion and is shared
+The core's one `pointerOperand` primitive (in `exec.zig`) owns click-word expansion and is shared
 verbatim by right-click and the delayed hover preview; that policy stays beside
 input because it also observes live pane selections and wrapped grid coordinates.
 
-`panes.zig` keeps each pane kind's storage and operations together.
+Each pane kind keeps its storage and operations together in its own file
+(`File.zig`, `Terminal.zig`, `Output.zig`, `Mini.zig`, `pdf_view.zig`, and the
+image pane in `image.zig`), reached through `panes.zig` beside `Pane`.
 `layout.zig` owns placement and presentation state. `pardes.zig` handles input
-and cross-pane state directly, without a pane vtable. Integration fixtures live
+and cross-pane state directly, without a pane vtable; the rest of the editor
+is split by thing as acme is: `edit.zig`, `normal.zig`, `look.zig`, `exec.zig`,
+`mouse.zig`, `Messages.zig`, `Pipe.zig`, `colors.zig`, `surface.zig`,
+`body_layer.zig` and `dump.zig`. Integration fixtures live
 in `test/panes.zig`, `test/output.zig`, and `test/pdf.zig`.
 
 = State
diff --git a/docs/helix-keys.md b/docs/helix-keys.md
index 6907473a..4de3901a 100644
--- a/docs/helix-keys.md
+++ b/docs/helix-keys.md
@@ -15,14 +15,14 @@ and is described in the Files list at the bottom instead.
 Code map, by SYMBOL — line numbers rot, names do not. Body-normal key
 RECOGNITION is `modal.Normal` in `src/modal.zig`: a state machine over `Role` (one
 per bound command, matched against `src/config.zig`'s chord lists by
-`Pardes.normalInput`), a `Prefix`, a `MatchSub` and a count, emitting a
+`normalInput` in `src/normal.zig`), a `Prefix`, a `MatchSub` and a count, emitting a
 semantic `Action` that both the text and PDF adapters consume. It knows
-nothing about panes or text. `src/pardes.zig` then EXECUTES: `Key`,
-`handleKey` (intercept order is load-bearing, see the comment there),
-`handleNormal` (parses directly into `Pane.normal`),
-`executeNormalAction`, `setPaneRange` (helix range → pane state),
-`enterInsert`, `handleInsert` / `insertKey`, `insertTab`, `normalDelete`,
-`normalYank`, `pasteText`, `normalChange`, `replaySels`, `multiOnce`. Undo
+nothing about panes or text. Then it is EXECUTED: `Key` and `handleKey` in
+`src/pardes.zig` (intercept order is load-bearing, see the comment there);
+`handleNormal` (parses directly into `Pane.normal`), `executeNormalAction`,
+`replaySels` and `multiOnce` in `src/normal.zig`; `setPaneRange` (helix range
+→ pane state); and `enterInsert`, `handleInsert` / `insertKey`, `insertTab`,
+`normalDelete`, `normalYank`, `pasteText`, `normalChange` in `src/edit.zig`. Undo
 and redo live in `panes.File` and `panes.Terminal`. Pure text math:
 `src/modal.zig` (the `hx*` family is the helix-semantics layer: gap offsets +
 ranges over the flat text). Differential harness: `test/hxdiff.zig` +
@@ -313,7 +313,7 @@ text.
 | `Ctrl-j` | insert newline (Enter alias) | | helix-verified (phase 5) |
 | `Home` / `End` | line start / line end past-the-last-char (`goto_line_end_newline`) | file panes (terminal insert cursor rides its run, as before) | helix-verified (phase 5) |
 | `PageUp` / `PageDown` | cursor page up / down, col kept (clamped to line) | file panes | helix-verified (phase 5) |
-| `Tab` | indent to the next 4-column stop with SPACES (`insertTab`, `pardes.zig`: `pad = INDENT_W - col % INDENT_W`) — no `\t` byte ever reaches the file | helix's Spaces indent style; helix smart-tab skipped. After a `.` in a file the backend speaks, Tab instead asks for completion and only indents if the answer is empty (section A) | helix-verified (phase 5) |
+| `Tab` | indent to the next 4-column stop with SPACES (`insertTab`, `edit.zig`: `pad = INDENT_W - col % INDENT_W`) — no `\t` byte ever reaches the file | helix's Spaces indent style; helix smart-tab skipped. After a `.` in a file the backend speaks, Tab instead asks for completion and only indents if the answer is empty (section A) | helix-verified (phase 5) |
 
 ## C. Skipped
 
diff --git a/docs/open-questions.md b/docs/open-questions.md
index e48d715e..9f4f44f5 100644
--- a/docs/open-questions.md
+++ b/docs/open-questions.md
@@ -10,8 +10,8 @@ Raised 2026-09-27 in the review of pardes against acme (Plan 9 source at
 
 **Today.** A middle-click, an `exec` write or a tag word that is not a builtin
 is typed into a terminal pane: the pane itself when it takes a command line,
-else a shell for the pane's directory (`Pardes.execute`, `ttyForDir` in
-`src/pardes.zig`). The command shares that shell's cwd, environment, history
+else a shell for the pane's directory (`execute`, `ttyForDir` in
+`src/exec.zig`). The command shares that shell's cwd, environment, history
 and aliases, and its output lands in the terminal.
 
 **acme.** An external command runs as its own process: stdin from