Reapply "fix(render): fit Anthropic page to 1568×728 (~1.15 MP) for WYSIWYG glyphs"

This reverts commit 6eaa8bfcd0.

src/core/export.ts

@@ -33,7 +33,7 @@ import {
 export const DEFAULT_EXPORT_MODEL = 'claude-sonnet-4-5';
 // Chars-per-token for the reporting estimate now lives in transform.ts as
 // REPORT_CHARS_PER_TOKEN (single source of truth for all token-estimate constants).
-/** Default column width — dense content mode (384 cols = 1928 px). */
+/** Default column width — dense content mode (312 cols = 1568 px). */
 export const DEFAULT_EXPORT_COLS: number = DENSE_CONTENT_COLS;
 
 // ---------------------------------------------------------------------------

src/core/gpt-model-profiles.ts

@@ -16,7 +16,15 @@
  *   PXPIPE_GPT_PROFILES='{"gpt-5.6":{"stripCols":176}}'   # widen only
  */
 
-import { MAX_HEIGHT_PX } from './render.js';
+/**
+ * GPT strip height, DECOUPLED from render.ts's MAX_HEIGHT_PX (which is Anthropic's
+ * 1568-edge / ~1.15 MP clamp). OpenAI's pre-tokenize resize is different: fit within
+ * 2048×2048, then shortest side → 768. A 768-px-wide portrait strip up to 2048 px tall
+ * survives un-resampled, so GPT keeps the taller page. Every built-in cost number below
+ * (1190 / 1445 / 2372 / 1464 / 630 …) was calibrated at this height — do not re-link to
+ * the Anthropic constant.
+ */
+export const GPT_MAX_HEIGHT_PX = 1932;
 
 /** Image-token cost model (mirrors OpenAI's mandatory pre-tokenize resize). */
 export type GptVisionCost =
@@ -38,7 +46,7 @@ export interface GptModelProfile {
 export const DEFAULT_GPT_STRIP_COLS = 152;
 
 const C = DEFAULT_GPT_STRIP_COLS;
-const H = MAX_HEIGHT_PX;
+const H = GPT_MAX_HEIGHT_PX;
 
 /**
  * Conservative fallback for unrecognized models: tile 85/170 over-states cost,

src/core/library.ts

@@ -165,7 +165,7 @@ export interface RenderTextToImagesOptions {
   readonly maxCharsPerImage?: number;
   /** Render style. Default DENSE_RENDER_STYLE (bare 5×8 cell, anti-aliased). */
   readonly style?: RenderStyle;
-  /** Max page height in px. Default MAX_HEIGHT_PX (1932). */
+  /** Max page height in px. Default MAX_HEIGHT_PX (728 — Anthropic 1568-edge / ~1.15 MP safe). */
   readonly maxHeightPx?: number;
 }
 

src/core/openai-history.ts

@@ -21,7 +21,8 @@
  * HistoryTurn list and the planner/renderer are shared.
  */
 
-import { renderTextToPngs, reflow, neutralizeSentinel, MAX_HEIGHT_PX, type RenderedImage } from './render.js';
+import { renderTextToPngs, reflow, neutralizeSentinel, type RenderedImage } from './render.js';
+import { GPT_MAX_HEIGHT_PX } from './gpt-model-profiles.js';
 import { countTokens as o200kCountTokens } from 'gpt-tokenizer/encoding/o200k_base';
 
 /** Portrait-strip width for GPT history images. Mirrors GPT_STRIP_COLS in
@@ -101,7 +102,9 @@ export const GPT_HISTORY_DEFAULTS: GptHistoryOptions = {
   collapseChunk: 10,
   freezeChunk: 10,
   sectionTokens: 2000,
-  maxHeightPx: MAX_HEIGHT_PX,
+  // GPT path: OpenAI's resize bounds (2048-bbox / 768 short side) permit the tall
+  // strip — do NOT re-link to render.ts MAX_HEIGHT_PX (Anthropic's 1568/1.15 MP clamp).
+  maxHeightPx: GPT_MAX_HEIGHT_PX,
   maxImages: GPT_HISTORY_MAX_IMAGES,
   reflow: true,
 };

src/core/render.ts

@@ -23,21 +23,26 @@ import {
 } from './atlas-gray.js';
 import { encodeGrayPng, encodeRgbPng } from './png.js';
 
-/** Page-height ceiling. 1932 px → 384-col page = 69×69 = 4761 tokens, under both Fable/Opus 4.8
- *  limits (≤4784 tokens AND ≤2000 px/side for >20-image requests). Exported for transform.ts math. */
-export const MAX_HEIGHT_PX = 1932;
-/** Char budget for the static slab (system + tools + CLAUDE.md). ~50k leaves headroom for
- *  soft-wrap and dropped chars; pages stay well under the 1932 px ceiling at cols=313. */
-export const READABLE_CHARS_PER_IMAGE = 50000;
-/** Char budget for dense content (tool output, collapsed history). 384 cols × 240 rows = 92160 chars
- *  fills the full ~1932×1932 ceiling. NOTE: verbatim recall of imaged text is unreliable at any size. */
-export const DENSE_CONTENT_CHARS_PER_IMAGE = 92160;
-export const DENSE_CONTENT_COLS = 384;
+/** Page-height ceiling. Measured (2026-07-01, count_tokens sweep, claude-sonnet-4-5 — see
+ *  /tmp/pxexp/LEVER1-findings.md): the API downscales any image to fit BOTH long-edge ≤1568
+ *  AND ~1.15 MP (≈1,143,750 px), then bills ≈ px/750 (≈1525 tok cap, applied per-image).
+ *  The old 1932×1932 page was billed at cap but resampled 0.555× → 5×8 glyphs reached the
+ *  encoder at ~2.8×4.4 px. New page shape 1568×728 = 1,141,504 px fits both bounds →
+ *  WYSIWYG for the vision encoder (also satisfies ≤2000 px/side for >20-image requests). */
+export const MAX_HEIGHT_PX = 728;
+/** Char budget for the static slab (system + tools + CLAUDE.md). Matches physical page
+ *  capacity at 312 cols × 90 rows so image-count estimates track real pagination. */
+export const READABLE_CHARS_PER_IMAGE = 28080;
+/** Char budget for dense content (tool output, collapsed history). 312 cols × 90 rows = 28080
+ *  chars fills the 1568×728 page. NOTE: verbatim recall of imaged text is unreliable at any size. */
+export const DENSE_CONTENT_CHARS_PER_IMAGE = 28080;
+export const DENSE_CONTENT_COLS = 312;
 /** Bare 5×8 cell (no padding). A/B showed 5×8 beats 7×10 on dense JSON (4/5 vs 3/5 reads, 42% fewer tokens).
  *  Revert to {cellWBonus:2, cellHBonus:2} if misread rates rise. */
 export const DENSE_RENDER_STYLE: RenderStyle = { cellWBonus: 0, cellHBonus: 0, aa: true };
-/** Default columns for the static slab. 313 × 5 px + 8 px pad = 1573 px — under the 1932 px ceiling. */
-const DEFAULT_COLS = 313;
+/** Default columns for the static slab. 312 × 5 px + 8 px pad = 1568 px — exactly the API's
+ *  long-edge bound (313 cols = 1573 px would trigger a 0.997× resample, blurring every glyph). */
+const DEFAULT_COLS = 312;
 /** Horizontal padding (left + right each), px. Exported for transform.ts token-cost math. */
 export const PAD_X = 4;
 /** Vertical padding (top + bottom each), px. Exported for transform.ts token-cost math. */
@@ -732,9 +737,9 @@ export async function renderTextToPngs(
 // OCR column ordering is the risk — gated behind an opt-in flag pending empirical eval.
 
 const GUTTER_CELLS = 4;
-// Width is capped at 1932 px, not 2000 px: a 1932-tall page = 69 patches, so width must
-// also be ≤69 patches (4761 tokens ≤ 4784). A 2000-px width → 72×69 = 4968 > 4784 → REJECTED.
-const MAX_WIDTH_PX = 1932;
+// Width hard-capped at the API's long-edge bound: anything wider is resampled server-side
+// (measured 2026-07-01: fit-within 1568-edge AND ~1.15 MP, then ≈px/750 billing).
+const MAX_WIDTH_PX = 1568;
 
 const GUTTER_DIVIDER_INK = 64; // pre-invert → 191 post-invert: light gray column separator
 const GUTTER_DIVIDER_INSET_PX = 2; // keep divider clear of padding rows