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feat(tiles): the grid holds at most 6 tiles (owner decision 7)

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Six was tested smooth on the owner's desktop; nine missed the headless
frame bar and is untested on real hardware. TILE_GRID_MAX (constants.js)
is now 6 and stays the one cap every limit reads; the layout table gets
its own bound, TILE_LAYOUT_MAX = 9, so the 7 to 9 layouts keep working
(unreachable) and going back to nine is that one line.

Every way in stops at the cap: opening, addTile, a tile's +, a session
Run makes, Ctrl/Cmd+click, the picker, "Open group as tiles", and a stored
grid with more ids (it comes back as its first six, focus kept only if it
survives, a dropped zoom cleared, row fractions that no longer match the
3x2 reset). The limits now go through one helper, _tileGridLimit(), whose
texts say which limit binds: "Up to 6 tiles" / "The grid holds at most 6
tiles" when it is the cap, "This window fits N" when it is the window.

Docs: decision 7 and an as-built entry in the spec, CLAUDE.md, the
invariants, the wiki's Tile Grid and Dashboard pages.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Codeman maintainer
2026-10-06 23:18:29 +02:00
parent 21beacf700
commit d2e72143e8
10 changed files with 217 additions and 32 deletions
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src/web/public/constants.js
+15 -6
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@@ -1636,11 +1636,19 @@ function buildSplitPickerSessions(sessions, sessionOrder, excludeId, detachedIds
// ── Tile grid (tile-grid.js) ───────────────────────────────────────────────
//
// Pure layout and state helpers for the tile grid (docs/tile-grid-plan.md):
// 1 to 9 live sessions side by side, each in its own TerminalTile. Desktop
// only, behind the same 1180px gate as the split pane.
// 1 to TILE_GRID_MAX live sessions side by side, each in its own TerminalTile.
// Desktop only, behind the same 1180px gate as the split pane.
/** Hard cap on tiles in one grid. */
const TILE_GRID_MAX = 9;
/**
* Hard cap on tiles in one grid: the ONE place it is set (owner decision 7 in
* docs/tile-grid-plan.md). Six was tested smooth on a real desktop; nine missed
* the headless frame bar and is untested on hardware. Everything that limits
* the grid reads this, and the layout table still covers up to TILE_LAYOUT_MAX,
* so raising the cap is this one line.
*/
const TILE_GRID_MAX = 6;
/** The largest count the layout table covers (3x3). Never a cap by itself. */
const TILE_LAYOUT_MAX = 9;
// The smallest tile worth showing: about 60 columns and a dozen rows at the
// default tile font. Bounds how many tiles a window can hold.
const TILE_MIN_W = 480;
@@ -1648,7 +1656,7 @@ const TILE_MIN_H = 240;
// Three tiles go side by side (3x1) only when each still gets ~600px;
// otherwise they take three cells of a 2x2.
const TILE_GRID_WIDE_3X1 = 1800;
// A tile's xterm keeps this many lines, not DEFAULT_SCROLLBACK: nine DOM
// A tile's xterm keeps this many lines, not DEFAULT_SCROLLBACK: a grid of DOM
// renderers at 50k lines each is a real memory cost, and a tile's load is a
// bounded 1 MiB window anyway, so more scrollback only fills with live output.
const TILE_SCROLLBACK = 10000;
@@ -1664,7 +1672,7 @@ const TILE_FONT_SIZE_DEFAULT = 13;
* @returns {{cols: number, rows: number, fits: boolean}}
*/
function computeTileLayout({ count, width = Infinity, height = Infinity, minTileW = TILE_MIN_W, minTileH = TILE_MIN_H }) {
const n = Math.min(Math.max(0, Math.floor(Number(count) || 0)), TILE_GRID_MAX);
const n = Math.min(Math.max(0, Math.floor(Number(count) || 0)), TILE_LAYOUT_MAX);
let cols;
let rows;
if (n === 0) return { cols: 0, rows: 0, fits: true };
@@ -2109,6 +2117,7 @@ if (typeof window !== 'undefined') {
tileInDirection,
cycleTile,
TILE_GRID_MAX,
TILE_LAYOUT_MAX,
TILE_MIN_W,
TILE_MIN_H,
TILE_SCROLLBACK,