Integrate remaining six PdfCraft parity PRs with conflict resolutions

Includes #4325 #1952 #4180 #2529 #4320 #4805, preserving their original histories.
Keep paragraph alignment and hard/soft wrap metadata together; retain CCITT/downsampling/RGB ownership guards with bounded JBIG2 export and exact-copy symbol encoding.
Combined interaction regressions added. Validation pending.

docs/gaps.md

@@ -1,9 +1,12 @@
 # Where PdfCraft falls short of Acrobat Pro
 
 > **Last reviewed:** 2026-10-25 · **Last updated:** 2026-10-25 · **Change:** minor (gaps 5 and 14 current state: native release Hans face via LXGW WenKai Lite; Arabic logical catalog, explicit RTL direction and mirrored stock chrome, with native/browser/IME workflows unqualified; no readiness re-estimate)
+> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-15 · **Change:** minor (gap 3: #2517 a blank line stays a paragraph break; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 
 > **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-19 · **Change:** minor (gap 2: composite fonts with `/ToUnicode /Identity-H` read as Unicode, hayro-interpret patch 44; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 > **Last reviewed:** 2026-10-17 · **Last updated:** 2026-10-17 · **Change:** minor (gap 6: #2662 redaction audit counts a cover over one word of a long line; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
+> **Last reviewed:** 2026-10-22 · **Last updated:** 2026-10-22 · **Change:** minor (gap 3: #2517 a partial rewrite inside one text object keeps the next paragraph; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
+> **Last reviewed:** 2026-10-18 · **Last updated:** 2026-10-18 · **Change:** minor (gap 3: #2517 a partial rewrite keeps a kept row inside the paragraph and leaves the next marked region closed; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 > **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-15 · **Change:** minor (gap 12: reading order is scored, not just word F1) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 > **Last reviewed:** 2026-10-14 · **Last updated:** 2026-10-14 · **Change:** minor (M1: raw-deflate fallback preserves decoding-limit errors; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 > **Last reviewed:** 2026-10-12 · **Last updated:** 2026-10-13 · **Change:** minor (gap 14: Vietnamese catalog shipped; Hindi/Indonesian/Korean and Arabic RTL remain) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
@@ -100,7 +103,13 @@ update the numbers.
   Legacy non-SFNT previews, mixed-font/style contextual runs, structure-tree fidelity and reliable
   semantic grouping on every untagged PDF remain open. Replacing one line or paragraph no longer
   removes a distinct neighbour whose glyph box overlaps (#1316); a second drawing on the same
-  baseline is still replaced. Estimates are unchanged.
+  baseline is still replaced. A blank line stays a paragraph break. An explicit `TL` is the
+  measured baseline gap, and growing a paragraph so its new row is one leading above the next
+  one does not absorb that paragraph (#2517). A partial rewrite of the last paragraph keeps a
+  source row inside that paragraph, and does not close a following marked region early. Two
+  paragraphs that share one text object keep that boundary when the first is rewritten. A heading
+  and smaller body lines (#1756) and cells in different columns (#1680, #2478) are still grouped
+  by the same geometry. A row that a list item wraps onto stays with that item. Estimates are unchanged.
 
 - **Missing:** robust in-place editing of text PdfCraft didn't write: subset fonts without the
   needed glyphs, CJK and right-to-left text, rotated text, lists, superscript/subscript, keeping
@@ -404,6 +413,8 @@ update the numbers.
 | Date | Change | Summary |
 |---|---|---|
 | 2026-10-25 | minor | Gaps 5 and 14 current state: native release builds embed LXGW WenKai Lite for Simplified Chinese, while the web build has no Hans face; Arabic catalogs stay logical with explicit RTL label direction and mirrored stock chrome, while native/browser RTL input, IME and complex workflows remain unqualified. Estimates unchanged. |
+| 2026-10-18 | minor | Gap 3: #2517 a partial rewrite keeps a kept source row in the paragraph and leaves the next marked region closed around its text. Estimates unchanged. |
+| 2026-10-15 | minor | Gap 3: #2517 a blank line at ordinary leading stays a paragraph break. Estimates unchanged. |
 | 2026-10-19 | minor | Gap 2: a Type 0 font whose `/ToUnicode` is the name `/Identity-H` or `/Identity-V` (WSCAD) reads its codes as Unicode, so such pages have text to select, find and edit (hayro-interpret patch 44, `view.render-cid-fonts`). Estimates unchanged. |
 | 2026-10-15 | minor | Gap 21: the side-by-side view had already shipped; the Compare panel filters text changes and visual differences. Estimate 10–20 h → 8–16 h |
 | 2026-10-20 | minor | Gap 6 #3673: Character encoding accepts Identity-H/V with Adobe CJK collections, or a predefined non-Identity CMap; negative and indirect-reference regressions and a read-only automation test passed after failing before the fix. Per-glyph validation and embedded-font extraction remain separate. Scores and estimates unchanged. |

docs/integration-20261030.md

@@ -3,7 +3,7 @@
 Base: 1d1cbc4ec92012767f5b48c92b451e15eb401c42
 
 Validation: pending combined GitHub CI. No fresh manual GUI pass has been performed.
-All included source heads are preserved as merge parents, retaining original authorship. No upstream PR was merged. No conflicts were manually resolved.
+All included source heads are preserved as merge parents, retaining original authorship. No upstream PR was merged. Conflicts were resolved after the user requested inclusion despite merge conflicts.
 
 ## Included
 - [#4304](https://github.com/storytold/pdfcraft/pull/4304): M11: PDF Optimizer stores black-and-white images as CCITT Group 4 (optimize.mono-compression) (1b7164cab1fc187c5385c30f94449542fe284280)
@@ -28,14 +28,16 @@ All included source heads are preserved as merge parents, retaining original aut
 - [#2133](https://github.com/storytold/pdfcraft/pull/2133): Fix Pages sidebar select-all keyboard shortcut (#2052) (7227eb68ab383e47413f1a980f340f5132cf4144)
 - [#2635](https://github.com/storytold/pdfcraft/pull/2635): Allow typed font sizes and Fill & Sign text colours (4b319bb3835709626c663b8d41b72d2f9574acc0)
 
-## Excluded
-- [#4320](https://github.com/storytold/pdfcraft/pull/4320): conflict.
-- [#4805](https://github.com/storytold/pdfcraft/pull/4805): conflict.
-- [#4325](https://github.com/storytold/pdfcraft/pull/4325): conflict.
-- [#4180](https://github.com/storytold/pdfcraft/pull/4180): conflict.
-- [#1952](https://github.com/storytold/pdfcraft/pull/1952): conflict.
-- [#2529](https://github.com/storytold/pdfcraft/pull/2529): conflict with main.
+## Added after conflict resolution
+- [#4320](https://github.com/storytold/pdfcraft/pull/4320): M11: lossless JBIG2 for black-and-white images (optimize.mono-compression) (e18d1bfed38272a33fad1b79b7452494a9f4dfd6).
+- [#4805](https://github.com/storytold/pdfcraft/pull/4805): M11: JBIG2 symbol coding for black-and-white images (optimize.mono-compression) (c7f39a4d9a341dcbdacaf3bc131ea2825f030b13).
+- [#4325](https://github.com/storytold/pdfcraft/pull/4325): M6: calculation checks: formulas reading missing fields, scripts building names, shown on the Calculation order page (ebad7f849d9dc04f8aa819efd4cfb06460de3d79).
+- [#4180](https://github.com/storytold/pdfcraft/pull/4180): M7: align the selected lines of a paragraph or text box on their own (5a86f35210ca98adb23ba53ff9d0871593b0cfdb).
+- [#1952](https://github.com/storytold/pdfcraft/pull/1952): feat(forms): edit checkbox and radio export values (#231) (e19f9646906df51c287f9b049feb8199cd645996).
+- [#2529](https://github.com/storytold/pdfcraft/pull/2529): M7: keep a blank line as a paragraph break (#2517) (55a933800b94b89c0caae001ec48609cd5f70256).
 
-Additional previously reviewed parity fixes: #2133 and #2635. #1952 was considered but conflicts.
+Additional previously reviewed parity fixes: #2133, #2635 and #1952.
 Excluded held PRs #4648, #2877 and #3762 were not included.
 Source reviews and individual hosted CI do not establish combined-build safety; the integration gate must pass.
+
+Integration-specific changes: preserve hard/soft wrap metadata together with per-row alignment; share CCITT/JBIG2 export paths with the 32 MiB globals cap retained; keep downsampling and RGB ownership guards with JBIG2 encoding; retain all translation keys and both sets of regression tests.

docs/pdf-spec-parity.md

@@ -2,6 +2,10 @@
 
 > **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-26 · **Change:** minor (§7.4: redaction decodes CCITT fax images, Group 3 on bytes aside; earlier, §7.4: CCITT decoding in `pdfcraft-filters`) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
+
 How much of ISO 32000-2 (PDF 2.0) and the PDF subset standards PdfCraft implements, set against
 what Acrobat Pro implements. This is PdfCraft's equivalent of a "geometry" or "codec" checklist:
 the parts of the format users never see named but always feel. Feature-level detail is in
@@ -22,6 +26,10 @@ are borrowed; PDF 2.0 additions and most subset standards are missing. **150–2
 | §7.2–7.5 | Syntax, objects, file structure, xref tables and streams, object streams, hybrid files, incremental updates | full | **own**, tolerant, repairs damaged files | `crates/cos`; corpus 958 files; fuzzed nightly |
 | §7.4 | Stream filters: Flate, LZW, ASCII85, ASCIIHex, RunLength, predictors | full | **own** | `crates/filters` |
 | §7.4 | Image filters: DCT, JPX, JBIG2, CCITTFax | full | **borrowed** (decode); CCITT Group 4 encoding | `core.image-filters` partial; own codecs M1.1/M1.2; CCITT decoding in `pdfcraft-filters` (`decode_ccitt`, through `hayro-ccitt`) for export, redaction and the Optimizer, which encodes Group 4 (`optimize.mono-compression`); no JBIG2 encoding |
+
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
 | §7.5.8 | Linearization | R W | R only | `core.linearization` planned |
 | §7.6.4 | Standard security handler R2–R6 (RC4 40/128, AES-128, AES-256), crypt filters, `/EncryptMetadata`, SASLprep | full | **own**, read and write | `crates/crypt`; written files open in Acrobat DC since #836 (#774: Acrobat needs the catalog outside object streams) |
 | §7.6.5 | Public-key security handler | full | none | `core.open-public-key`, `protect.certificate-encryption` planned |
@@ -132,6 +140,10 @@ are borrowed; PDF 2.0 additions and most subset standards are missing. **150–2
 |---|---|---|
 | 2026-10-26 | minor | §7.4: redaction clears pixels in CCITT fax images through the CCITT decoder, instead of removing them whole (Group 4 and Group 3 off bytes; Group 3 on bytes is still removed whole, as the bootstrap renderer may draw it as other rows than the decoder reads) |
 | 2026-10-26 | minor | §7.4: CCITT decoding (`hayro-ccitt`) in `pdfcraft-filters`, for export and the Optimizer |
+
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
 | 2026-10-26 | minor | §7.4: CCITT Group 4 encoding (`fax`) in the Optimizer |
 | 2026-10-14 | minor | §12.4.4: `/Trans` and `/Dur` read into `DocInfo::transitions` and reported by `doc_info` |
 | 2026-10-11 | minor | §7.6.4: encrypted files we write open in Acrobat (#774, fixed by #836) |

docs/roadmap.md

@@ -1,12 +1,16 @@
 # PdfCraft roadmap: milestones and what's next
 
+> **Last reviewed:** 2026-10-29 | **Last updated:** 2026-10-29 | **Change:** minor (M7 #2517: a narrowed then widened paragraph keeps the typed spaces the wrap consumed, after save and reopen; estimates unchanged)
 > **Last reviewed:** 2026-10-27 | **Last updated:** 2026-10-27 | **Change:** minor (M10: OCR model downloads use verified ONNX pairs with legacy discovery fallback; estimates unchanged)
 > **Last reviewed:** 2026-10-25 | **Last updated:** 2026-10-25 | **Change:** minor (M5: one reply in the Comments panel is edited, copied or deleted from its own "…" menu; estimates unchanged)
+> **Last reviewed:** 2026-10-26 · **Last updated:** 2026-10-26 · **Change:** minor (M11: lossless JBIG2 stores each distinct mark once, as a symbol; estimates unchanged)
 > **Last reviewed:** 2026-10-25 | **Last updated:** 2026-10-25 | **Change:** minor (M14 localization current state: Arabic logical catalog, explicit RTL label direction and mirrored stock chrome; native/browser RTL workflows unqualified. Native release Hans face via LXGW WenKai Lite; estimates unchanged)
 > **Last reviewed:** 2026-10-24 · **Last updated:** 2026-10-24 · **Change:** minor (M11: the optimizer stores Group 3 fax images as Group 4, and packs black-and-white RGB and indexed images that use only palette entries 0 and 1 to one bit; estimates unchanged)
 > **Last reviewed:** 2026-10-24 · **Last updated:** 2026-10-24 · **Change:** minor (M11: black-and-white images above 450 ppi are averaged down to 300 ppi by the optimizer; estimates unchanged)
 > **Last reviewed:** 2026-10-24 · **Last updated:** 2026-10-24 · **Change:** minor (M11: black-and-white pictures stay one bit when PDFs are created and optimized; CCITT images export; estimates unchanged)
+> **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-24 · **Change:** minor (M11: the PDF Optimizer can store black-and-white images as lossless JBIG2, and Export ▸ Images reads JBIG2 images; estimates unchanged)
 > **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M11: the PDF Optimizer and Reduce File Size store black-and-white images as CCITT Group 4 when smaller; estimates unchanged)
+> **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M6: the calculation order flags a formula that reads a field the form doesn't have and a script that builds the names it reads; the tools show each formula; estimates unchanged)
 > **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M7, #2636 partial: pasting added text boxes and images in the engine and through `content_copy`; estimates unchanged)
 > **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M11: image optimization accounts for page-local UserUnit; estimates unchanged)
 
@@ -14,7 +18,8 @@
 > **Last reviewed:** 2026-10-23 | **Last updated:** 2026-10-23 | **Change:** minor (M10: table spans retain text from covered slots in Office exports; estimates unchanged)
 > **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M10: image export preserves soft-mask Decode opacity ranges; estimates unchanged)
 > **Last reviewed:** 2026-10-23 · **Last updated:** 2026-10-23 · **Change:** minor (M10: vector printing preserves existing page XObjects when adding annotation appearances; estimates unchanged)
-> **Last reviewed:** 2026-10-20 · **Last updated:** 2026-10-20 · **Change:** minor (M12 #3673: Character encoding accepts Identity-H/V with Adobe CJK collections; estimates unchanged)
+> **Last reviewed:** 2026-10-22 · **Last updated:** 2026-10-22 · **Change:** minor (M7 #2517: a partial rewrite inside one text object closes its marker before the next paragraph; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
+> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-15 · **Change:** minor (M7 #2517: a blank line stays a paragraph break; estimates unchanged) · **Target:** Adobe Acrobat Pro (Acrobat DC, continuous track 26.002.21931, macOS)
 
 > **Last reviewed:** 2026-10-20 | **Last updated:** 2026-10-20 | **Change:** minor (M10, #3532 partial: vector printing retains existing appearances with absent Subtype; estimates unchanged)
 
@@ -263,7 +268,11 @@ Estimates unchanged.
 | 2026-10-24 | minor | M11: the PDF Optimizer and Reduce File Size store Group 3 fax images as Group 4 when smaller (`Document::fax_params`), and pack eight-bit `DeviceRGB` of only black and white (as grey) and indexed images of 2, 4 or 8 bits that use only palette entries 0 and 1 (keeping the palette) to one bit, so Monochrome Images compresses and downsamples them. Estimates unchanged. |
 | 2026-10-24 | minor | M11: monochrome downsampling: the PDF Optimizer and Reduce File Size average black-and-white images (1-bit, CCITT fax, eight-bit black-and-white grey) above 450 ppi down to 300 ppi, by area with ties black, as Monochrome Images ▸ Downsample to and `doc_optimize` `mono: { downsample, ppi, above_ppi }`; CCITT decoding moves into `pdfcraft-filters` (`decode_ccitt`) behind `Document::decoded_image`. Estimates unchanged. |
 | 2026-10-24 | minor | M11: Create PDF stores pictures of only black and white at one bit (Group 4 or Flate, whichever is smaller) instead of eight-bit grey; the optimizer packs eight-bit black-and-white grey images to one bit before Monochrome Images compresses them, unless the grey settings make them smaller, as they can a dithered scan, soft mask counted; Export ▸ Images decodes CCITT fax images. Estimates unchanged. |
+| 2026-10-26 | minor | M11: lossless JBIG2 symbol coding (`pdfcraft_filters::encode_jbig2`): each distinct mark stored once in a symbol dictionary and its exact copies placed by a text region, larger and lone marks in a generic region, used when smaller than the generic coding; on six pages of rendered 300 dpi text 28% of the generic region's size and 17% of Group 4's. Scans gain little until refinement coding; `/JBIG2Globals` and lossy coding not yet. Estimates unchanged. |
+| 2026-10-23 | minor | M11: lossless JBIG2 for black-and-white images (`pdfcraft_filters::encode_jbig2_generic`, a generic region coded with the MQ coder, written from the JBIG2 draft standard), as Monochrome Images ▸ JBIG2 (lossless) and `doc_optimize` `mono: jbig2`; about a third smaller than Group 4 on 300 dpi text. Export ▸ Images reads JBIG2 images (`hayro-jbig2`, with `/JBIG2Globals`). Symbol coding not yet. Estimates unchanged. |
 | 2026-10-23 | minor | M11: black-and-white images (1-bit, and image masks) are stored losslessly as CCITT Group 4 when that is smaller: PDF Optimizer ▸ Images ▸ Monochrome Images (on by default, so Reduce File Size too), `doc_optimize` `mono`; `pdfcraft_filters::encode_g4`. JBIG2 and monochrome downsampling not yet. Estimates unchanged. |
+| 2026-10-23 | minor | M6: calculation checks: a formula reading a field the form doesn't have, and a script building the names it reads, are flagged by `form_calculation_order` and on the Calculation order page (a red mark, a card naming the broken formulas, a note for built names); `form_calculation_order` gives each formula and `form_fields` a custom Calculate script. Estimates unchanged. |
+| 2026-10-29 | minor | M7 #2517: widening a paragraph rejoins a wrap with the spaces that wrap consumed, including a typed run and none for a Chinese or Japanese word split, after an incremental save and a full rewrite. Estimates unchanged. |
 | 2026-10-27 | minor | M10: OCR stages SHA-256-verified ONNX models after the upstream RTEN URL brownout; discovery prefers a complete ONNX pair per directory, falls back to a complete RTEN pair, and never mixes formats or directories; language/web limits and estimates unchanged. |
 | 2026-10-24 | minor | M3, #3970 follow-up: the button release given back after a window move or resize goes before the pointer leaving, so hover doesn't stick. Estimates unchanged. |
 | 2026-10-23 | minor | M8, #3205 follow-up: phone-pattern redaction includes the +39 country code on labelled Italian geographic numbers with a slash; dates, protocol identifiers and whole-run guards remain. Estimates unchanged. |
@@ -274,6 +283,9 @@ Estimates unchanged.
 | 2026-10-21 | minor | M3: on GNOME/Wayland, a second resize by an edge or move by the tab strip works without a click in between (the compositor kept the button's release from egui). Estimates unchanged. |
 | 2026-10-22 | minor | M4, #3916 partial: edits and Undo/Redo cancel Organize page drags. Pointer-release and save/reopen regressions check page order. Estimates unchanged. |
 | 2026-10-22 | minor | M14 #3558: rebased macOS association recovery; reuse #3042 shared metadata preservation instead of a duplicate save wrapper. Estimates unchanged. |
+| 2026-10-22 | minor | M7 #2517: a partial rewrite of two paragraphs that share one text object closes the marker before the neighbour, so a later edit does not delete it. Estimates unchanged. |
+| 2026-10-18 | minor | M7 #2517: a partial rewrite of the last paragraph closes its marker after the last `ET`, and does not close a following marked region early. Estimates unchanged. |
+| 2026-10-15 | minor | M7 #2517: a blank line between paragraphs stays a paragraph break, and growing the first paragraph does not absorb the next one. Estimates unchanged. |
 | 2026-10-20 | minor | M4: initial-view window and interface options resolve indirect boolean ViewerPreferences values; synthetic true/false and save/reopen regressions retain defaults for malformed entries. Estimates unchanged. |
 | 2026-10-21 | minor | M3, #3808: the Pages inspector has an independent 50–150% thumbnail size slider and buttons; selection and current-page following are retained, with headless ui.set coverage. Estimates unchanged. |
 | 2026-10-20 | minor | M11 #3507: image merging preserves comments and state across content streams. Estimates unchanged. |

docs/target-app-parity.md

@@ -1,6 +1,10 @@
 # PdfCraft parity with Adobe Acrobat Pro
 
 > **Last reviewed:** 2026-10-25 · **Last updated:** 2026-10-26 · **Change:** minor (K Optimize and standards no longer lists monochrome downsampling as missing; scores and estimates unchanged)
+
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
 > **Last reviewed:** 2026-10-25 · **Last updated:** 2026-10-26 · **Change:** minor (`optimize.mono-compression` partial (CCITT Group 4): K Optimize and standards 15 shipped and 11 partial of 58, 35.3%; breadth 57.0% unweighted (423 + 75 of 808), mainstream 63.3% (292 + 45 of 497); estimates unchanged)
 > **Last reviewed:** 2026-10-25 · **Last updated:** 2026-10-25 · **Change:** minor (localization current state: Arabic logical catalog, explicit RTL direction and mirrored stock chrome; native/browser RTL workflows unqualified. Native release Hans face via LXGW WenKai Lite. Scores and estimates unchanged)
 
@@ -211,6 +215,10 @@ full parity in that area.
 | I Scan and OCR | 26 | 5 | 2 | 23.1% | 15% | 40–75 | Searchable image (ocrs, Latin script without accents) on pages, ranges and many files. Missing: every other language (#744 Dutch; accents, CJK, Cyrillic, Arabic), editable-text output, deskew, rotation, despeckle, camera images beyond straightening (found or placed corners): orientation, clean-up, MRC compression, scanners |
 | J Create and export | 34 | 12 | 3 | 39.7% | 25% | 55–100 | Create from images, multipage TIFF, text, clipboard, blank, many files at once; export PNG/JPEG/TIFF, text, RTF; Word and HTML partial. Missing: Office/HTML/web/PostScript to PDF, Excel and PowerPoint export, Word layout fidelity (#773), SVG/XML/EPS/PS/JPEG 2000 export, accessible text |
 | K Optimize and standards | 58 | 15 | 11 | 35.3% | 20% | 65–115 | Reduce File Size and the Optimizer (images, discards, clean-up, space audit); PDF/A-2b/3b verify and convert (partial). Missing: Preflight (profiles, fixups, reports), PDF/A-1/4 and a/u levels, PDF/X, PDF/UA, PDF/E, PDF/VT, transparency flattening, font unembedding, monochrome JBIG2 |
+
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
 | L Print | 39 | 15 | 1 | 39.7% | 35% | 30–55 | Acrobat's sizing, n-up, booklet, poster, comments & forms, preview, print-ready PDF, CUPS on macOS/Linux, the Windows spooler (#756) and the browser's print dialog on the web. Missing: print as image, PostScript, all print-production tools (output preview, separations, ink manager, printer marks, colour conversion) |
 | M Accessibility | 61 | 38 | 1 | 63.1% | 30% | 40–70 | Accessibility Checker (all 32 rules, report, fixes), alternate text, title and language. Missing: autotag, Tags/Order/Content panels, Reading Order tool, artifact marking, table editor, Read Out Loud, full keyboard operation of the app, screen-reader audit |
 | N Automation, preferences, misc | 75 | 20 | 5 | 30.0% | 35% | 25–45 | CLI, MCP, UI control channel, 141 automation tools, Action Wizard (run, create), compare (text, visual, report, side by side, Text/Visual filter). Missing: most Preferences pages, Acrobat's finer compare filters, Action Wizard management, custom commands, AI providers, rich media/3D, hosted web app |
@@ -297,6 +305,10 @@ licensed OCR or AI model.
 | Date | Change | Summary |
 |---|---|---|
 | 2026-10-26 | minor | K Optimize and standards no longer lists monochrome downsampling as missing (black-and-white images above 450 ppi are averaged down to 300). Scores and estimates unchanged. |
+
+Lossless JBIG2 encoding and image export are included alongside CCITT decoding and monochrome downsampling; combined validation is pending.
+
+JBIG2 exact-copy symbol dictionaries and text regions are included; lossy substitution is not supported.
 | 2026-10-26 | minor | `optimize.mono-compression` became partial (CCITT Group 4), counted on the table's own measurement: K Optimize and standards 15 shipped and 11 partial of 58 (35.3%), no longer listing CCITT as missing; breadth 57.0% unweighted (423 + 75 of 808), mainstream 63.3% (292 + 45 of 497). Estimates unchanged. |
 | 2026-10-25 | minor | Localization current state: Arabic catalogs stay logical, Arabic/Kurdish labels take an explicit RTL direction, and stock chrome mirrors; native/browser RTL input, IME and complex workflows remain unqualified. Native Simplified Chinese uses LXGW WenKai Lite; the web build has no Hans face. Scores and estimates unchanged. |
 | 2026-10-20 | minor | M12 #3673: the Character encoding rule accepts Identity-H/V fonts with Adobe CJK collections, or a predefined non-Identity CMap, while rejecting unknown names and foreign registries. Synthetic checker and read-only automation regressions passed after failing before the fix; per-glyph mapping validation and embedded-font extraction remain separate. Breadth, readiness and hours unchanged. |