Review fixes: describe the YEARFRAC, MOD and PERCENTRANK changes in function-parity

# Conflicts:
#	docs/function-parity.md

AGENTS.md

@@ -2,8 +2,6 @@
 
 GridCraft is a clean-room, open-source, Rust-native spreadsheet targeting Microsoft Excel parity — and superiority (speed, openness, agent control). It runs natively on macOS, Windows, Linux and BSD, and on the web via WASM. Siblings with the same conventions: `../designcraft` (InDesign-class, the closest reference), `../photocraft` (Photoshop), `../vectorcraft` (Illustrator), `../pdfcraft` (Acrobat), `../filmcraft` (Premiere), `../lightcraft` (Lightroom), `../effectcraft` (After Effects).
 
-Standards and learnings shared across the crafting apps live in `../../craftrules` (checked out next to the craft apps, or `storytold/craftrules`). Read its `AGENTS.md` at the start of a session, follow its standards, and contribute reusable learnings back there. Never code: repos don't share code.
-
 ## Start every session here
 1. Read `plan/STATUS.md` (current milestone, next task), then the task in `plan/execution-plan.md` and the relevant `plan/architecture.md` section. Behaviour reference: `plan/excel/*.md` (`observed-ui.md` holds measured observations of the running app).
 2. Follow the autonomous operation protocol (`plan/execution-plan.md` §7). Don't stop to ask unless §7 lists the decision as the user's.
@@ -20,7 +18,7 @@ Standards and learnings shared across the crafting apps live in `../../craftrule
 - The ArtCraft brand files in `docs/brand/` are ArtCraft trademarks under `docs/brand/LICENSE-brand.txt`, the one exception.
 
 ## Never crash
-People trust GridCraft with their numbers; a crash loses their work. **This outranks feature work.** Standard: [`craftrules/standards/never-crash.md`](https://github.com/storytold/craftrules/blob/main/standards/never-crash.md).
+People trust GridCraft with their numbers; a crash loses their work. **This outranks feature work.**
 - **No panics in non-test code:** no `unwrap()`, `expect()`, `panic!`, `unreachable!`, `todo!`, `unimplemented!`; no `unsafe` (`unsafe_code = "forbid"`).
 - **Errors are `Result<T, E>`** through the crate's error type and `?`.
 - **Input-derived numbers are hostile** (files, formulas, commands, MCP/control params): validate indexes and ranges before access, use checked access when validity is not established, use checked/saturating arithmetic, and cap input-sized allocations (huge ranges, `REPT`, `SEQUENCE`, whole-column references).
@@ -31,8 +29,8 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 
 ## Non-negotiables
 - **Clean-room.** Microsoft Excel is installed on the dev machine and may be *observed* black-box: run it, use its UI with synthetic workbooks, take screenshots (by window id) stored only under `plan/excel/screenshots/`. Never read, disassemble or copy anything inside the Office bundle, never commit files produced by Excel, never copy GPL/AGPL/LGPL code (LibreOffice, Gnumeric…). Function behaviour comes from public documentation and observation.
-- **Fonts live in [`storytold/craft-fonts`](https://github.com/storytold/craft-fonts)**, never in this repo. It is an optional build input (`CRAFT_FONTS_DIR`); without it the app uses system fonts and egui's defaults. Standard: craftrules `standards/fonts.md`.
+- **Fonts live in [`storytold/craft-fonts`](https://github.com/storytold/craft-fonts)**, never in this repo. It is an optional build input (`CRAFT_FONTS_DIR`); without it the app uses system fonts and egui's defaults.
-- **Test corpora** (real Excel-authored files) live in a separate corpus repo, fetched pinned and sha256-verified (craftrules `standards/test-corpora.md`). Never commit large binary fixtures; build test workbooks in code.
+- **Test corpora** (real Excel-authored files) live in a separate corpus repo, fetched pinned and sha256-verified. Never commit large binary fixtures; build test workbooks in code.
 - **Everything is a command.** User-visible behaviour = a command in `crates/engine/src/cmd/*` (id, label, ribbon path, shortcut, params doc, `enabled`, `run`) + tests. Ids follow Excel's ribbon (`home.bold`, `insert.chart`, `data.sortAscending`) plus primitives (`cell.set`, `selection.set`, `range.setValues`). UI-only commands live in `crates/ui-egui`. The control channel, CLI and MCP reach all of them.
 - **Programmatic calls never open dialogs**: a command with empty params runs with defaults or returns an error; only menu-style invocation opens a dialog (`UiRequest::Dialog`).
 - **Layering** is enforced by `cargo xtask layers`: `core`/`numfmt` (L0) → `formula`/`functions` (L1) → `model`/`calc`/`xlsx` (L2) → `chart` (L3) → `engine` (L5) → `ui-egui`/`mcp` (L6) → `apps/*` (L7). Nothing below L6 depends on egui/eframe/winit/rfd. **The UI crate is swappable.**
@@ -51,7 +49,7 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 - Parallel agents: separate `CARGO_TARGET_DIR` per agent; edit only the crates you own; delete your target dir when done.
 
 ## Roadmap
-`ROADMAP.md` (committed) is the one-page summary: stage, headline numbers, dimensions, languages, progress log. It follows craftrules `standards/progress-docs.md` and points at the detail in `docs/`: `target-app-parity.md` (authoritative assessment), `gaps.md` (ranked work list: pick from it), `roadmap.md` (current focus, beta gates, milestones), `architecture.md`, and the area checklists `function-parity.md`, `chart-parity.md`, `file-format-parity.md`, `ui-parity.md`, `hardware-parity.md`, `localization-parity.md`. Update the affected docs (and their timestamp lines and revision history) whenever work lands. `cargo xtask parity` regenerates `docs/parity-checklist.md` from `crates/engine/src/catalog.rs`.
+`ROADMAP.md` (committed) is the one-page summary: stage, headline numbers, dimensions, languages, progress log. It points at the detail in `docs/`: `target-app-parity.md` (authoritative assessment), `gaps.md` (ranked work list: pick from it), `roadmap.md` (current focus, beta gates, milestones), `architecture.md`, and the area checklists `function-parity.md`, `chart-parity.md`, `file-format-parity.md`, `ui-parity.md`, `hardware-parity.md`, `localization-parity.md`. Update the affected docs (and their timestamp lines and revision history) whenever work lands. `cargo xtask parity` regenerates `docs/parity-checklist.md` from `crates/engine/src/catalog.rs`.
 
 ## Contributor credits (About window)
 
@@ -62,14 +60,11 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
   username has a `[people.<username>]` entry in `contributors/people.toml`. If not, ask them once
   whether they want to be credited by more than their username: a real name, a display name, and/or
   their public GitHub profile name (`sync_github_name = true`). If yes, add **only their own** entry
-  (copy the template at the top of the file, or run
+  (copy the template at the top of the file)
-  `python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "…" --sync-github-name`)
   and include it in their PR, committed as them. If no, change nothing: they are credited as
   `@username` anyway.
 - Never add, edit, guess or copy anyone else's entry or name (not from git config, commit authors or
   GitHub profiles). Never hand-edit `contributors.json`.
-- Maintainers refresh the stats with `python3 ../../craftrules/scripts/contributors.py .` (it also
-  re-verifies who wrote each `people.toml` entry; `--check` only verifies).
 
 ## CI workflows
 - Workflows in `.github/workflows/` call the shared workflows in [`storytold/craft-common-actions`](https://github.com/storytold/craft-common-actions) at `@main`, with their inputs and secrets. No other jobs: if no shared workflow does what's needed, it doesn't go here.

ATTRIBUTION.md

@@ -12,15 +12,15 @@ Generated-in-code art is original and has no file to list: the UI icon set (`cra
 | `epaint_default_fonts::HACK_REGULAR` (dependency font input) | Source Foundry Authors (Hack; DejaVu and Bitstream Vera foundations) | [egui 6d518fc](https://github.com/storytold/egui/tree/6d518fc799681571963842f95b55a6b68431b15a/crates/epaint_default_fonts/fonts), [Hack](https://github.com/source-foundry/Hack) | MIT + Bitstream Vera License (full upstream texts in `NOTICE`) | Hack-Regular.ttf is egui's bundled monospace face and GridCraft's last-resort symbol fallback. Dependency asset unmodified here, no font file copied into this repository. |
 | `epaint_default_fonts::NOTO_EMOJI_REGULAR` (dependency font input) | The Noto Project Authors | [egui 6d518fc](https://github.com/storytold/egui/tree/6d518fc799681571963842f95b55a6b68431b15a/crates/epaint_default_fonts/fonts), [Noto Emoji](https://fonts.google.com/noto/specimen/Noto+Emoji) | SIL Open Font License 1.1 (full upstream text in `NOTICE`) | NotoEmoji-Regular.ttf is enabled by egui's `monochrome_emoji_fonts` feature and used as the monochrome emoji fallback. Dependency asset unmodified here, no font file copied into this repository. |
 | `epaint_default_fonts::UBUNTU_LIGHT` (dependency font input) | Canonical Ltd. and the Ubuntu Font Family authors | [egui 6d518fc](https://github.com/storytold/egui/tree/6d518fc799681571963842f95b55a6b68431b15a/crates/epaint_default_fonts/fonts), [Ubuntu font](https://design.ubuntu.com/font) | Ubuntu Font Licence 1.0 (full upstream text in `NOTICE`) | Ubuntu-Light.ttf is egui's default proportional face. Dependency asset unmodified here, no font file copied into this repository. |
-| `docs/brand/artcraft-logo.svg` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms (`docs/brand/LICENSE-brand.txt`) | Trademark, not open source |
+| `docs/brand/artcraft-logo.svg` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms (`docs/brand/LICENSE-brand.txt`) | Trademark, not open source |
-| `docs/brand/artcraft-logo.png` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-logo.png` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-logo-white.svg` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-logo-white.svg` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-logo-white.png` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-logo-white.png` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-mark.svg` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-mark.svg` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-mark.png` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-mark.png` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-mark-black.svg` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-mark-black.svg` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/artcraft-mark-black.png` | ArtCraft Team | craftrules `assets/brand/` | ArtCraft brand terms | Trademark |
+| `docs/brand/artcraft-mark-black.png` | ArtCraft Team | ArtCraft brand kit | ArtCraft brand terms | Trademark |
-| `docs/brand/LICENSE-brand.txt` | (licence text) | craftrules | — | |
+| `docs/brand/LICENSE-brand.txt` | (licence text) | project | — | |
 | `assets/app-icon/gridcraft.svg` | GridCraft contributors | original (hand-written SVG; `packaging/icons.sh`) | MIT OR Apache-2.0 (`assets/app-icon/LICENSE.txt`) | PLACEHOLDER app icon (ledger page); replaced by the owner's creature art later |
 | `packaging/macos/dmg/background.svg` | @XusBadia | original (hand-written SVG, derived from the GridCraft app icon `assets/app-icon/gridcraft.svg`, referenced via `<image>`, not copied; text is outlined glyph paths; `packaging/macos/dmg/generate.py` renders it to `background.tiff`) | MIT OR Apache-2.0 (`LICENSE-MIT`, `LICENSE-APACHE`) | GridCraft macOS DMG window background for the Finder window; added 2026-10-08 |
 | `packaging/macos/dmg/background.tiff` | @XusBadia | Rendered from `packaging/macos/dmg/background.svg` by `packaging/macos/dmg/generate.py` | MIT OR Apache-2.0 (`LICENSE-MIT`, `LICENSE-APACHE`) | 1x + 2x HiDPI TIFF for the macOS DMG window; includes the app icon (see its row) and LittleCMS's built-in sRGB profile ("No copyright, use freely") |

CLAUDE.md

@@ -2,8 +2,6 @@
 
 GridCraft is a clean-room, open-source, Rust-native spreadsheet targeting Microsoft Excel parity — and superiority (speed, openness, agent control). It runs natively on macOS, Windows, Linux and BSD, and on the web via WASM. Siblings with the same conventions: `../designcraft` (InDesign-class, the closest reference), `../photocraft` (Photoshop), `../vectorcraft` (Illustrator), `../pdfcraft` (Acrobat), `../filmcraft` (Premiere), `../lightcraft` (Lightroom), `../effectcraft` (After Effects).
 
-Standards and learnings shared across the crafting apps live in `../../craftrules` (checked out next to the craft apps, or `storytold/craftrules`). Read its `AGENTS.md` at the start of a session, follow its standards, and contribute reusable learnings back there. Never code: repos don't share code.
-
 ## Start every session here
 1. Read `plan/STATUS.md` (current milestone, next task), then the task in `plan/execution-plan.md` and the relevant `plan/architecture.md` section. Behaviour reference: `plan/excel/*.md` (`observed-ui.md` holds measured observations of the running app).
 2. Follow the autonomous operation protocol (`plan/execution-plan.md` §7). Don't stop to ask unless §7 lists the decision as the user's.
@@ -20,7 +18,7 @@ Standards and learnings shared across the crafting apps live in `../../craftrule
 - The ArtCraft brand files in `docs/brand/` are ArtCraft trademarks under `docs/brand/LICENSE-brand.txt`, the one exception.
 
 ## Never crash
-People trust GridCraft with their numbers; a crash loses their work. **This outranks feature work.** Standard: [`craftrules/standards/never-crash.md`](https://github.com/storytold/craftrules/blob/main/standards/never-crash.md).
+People trust GridCraft with their numbers; a crash loses their work. **This outranks feature work.**
 - **No panics in non-test code:** no `unwrap()`, `expect()`, `panic!`, `unreachable!`, `todo!`, `unimplemented!`; no `unsafe` (`unsafe_code = "forbid"`).
 - **Errors are `Result<T, E>`** through the crate's error type and `?`.
 - **Input-derived numbers are hostile** (files, formulas, commands, MCP/control params): `get()` instead of indexing, checked/saturating arithmetic, cap input-sized allocations (huge ranges, `REPT`, `SEQUENCE`, whole-column references).
@@ -31,8 +29,8 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 
 ## Non-negotiables
 - **Clean-room.** Microsoft Excel is installed on the dev machine and may be *observed* black-box: run it, use its UI with synthetic workbooks, take screenshots (by window id) stored only under `plan/excel/screenshots/`. Never read, disassemble or copy anything inside the Office bundle, never commit files produced by Excel, never copy GPL/AGPL/LGPL code (LibreOffice, Gnumeric…). Function behaviour comes from public documentation and observation.
-- **Fonts live in [`storytold/craft-fonts`](https://github.com/storytold/craft-fonts)**, never in this repo. It is an optional build input (`CRAFT_FONTS_DIR`); without it the app uses system fonts and egui's defaults. Standard: craftrules `standards/fonts.md`.
+- **Fonts live in [`storytold/craft-fonts`](https://github.com/storytold/craft-fonts)**, never in this repo. It is an optional build input (`CRAFT_FONTS_DIR`); without it the app uses system fonts and egui's defaults.
-- **Test corpora** (real Excel-authored files) live in a separate corpus repo, fetched pinned and sha256-verified (craftrules `standards/test-corpora.md`). Never commit large binary fixtures; build test workbooks in code.
+- **Test corpora** (real Excel-authored files) live in a separate corpus repo, fetched pinned and sha256-verified. Never commit large binary fixtures; build test workbooks in code.
 - **Everything is a command.** User-visible behaviour = a command in `crates/engine/src/cmd/*` (id, label, ribbon path, shortcut, params doc, `enabled`, `run`) + tests. Ids follow Excel's ribbon (`home.bold`, `insert.chart`, `data.sortAscending`) plus primitives (`cell.set`, `selection.set`, `range.setValues`). UI-only commands live in `crates/ui-egui`. The control channel, CLI and MCP reach all of them.
 - **Programmatic calls never open dialogs**: a command with empty params runs with defaults or returns an error; only menu-style invocation opens a dialog (`UiRequest::Dialog`).
 - **Layering** is enforced by `cargo xtask layers`: `core`/`numfmt` (L0) → `formula`/`functions` (L1) → `model`/`calc`/`xlsx` (L2) → `chart` (L3) → `engine` (L5) → `ui-egui`/`mcp` (L6) → `apps/*` (L7). Nothing below L6 depends on egui/eframe/winit/rfd. **The UI crate is swappable.**
@@ -50,7 +48,7 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 - Parallel agents: separate `CARGO_TARGET_DIR` per agent; edit only the crates you own; delete your target dir when done.
 
 ## Roadmap
-`ROADMAP.md` (committed) is the one-page summary: stage, headline numbers, dimensions, languages, progress log. It follows craftrules `standards/progress-docs.md` and points at the detail in `docs/`: `target-app-parity.md` (authoritative assessment), `gaps.md` (ranked work list: pick from it), `roadmap.md` (current focus, beta gates, milestones), `architecture.md`, and the area checklists `function-parity.md`, `chart-parity.md`, `file-format-parity.md`, `ui-parity.md`, `hardware-parity.md`, `localization-parity.md`. Update the affected docs (and their timestamp lines and revision history) whenever work lands. `cargo xtask parity` regenerates `docs/parity-checklist.md` from `crates/engine/src/catalog.rs`.
+`ROADMAP.md` (committed) is the one-page summary: stage, headline numbers, dimensions, languages, progress log. It points at the detail in `docs/`: `target-app-parity.md` (authoritative assessment), `gaps.md` (ranked work list: pick from it), `roadmap.md` (current focus, beta gates, milestones), `architecture.md`, and the area checklists `function-parity.md`, `chart-parity.md`, `file-format-parity.md`, `ui-parity.md`, `hardware-parity.md`, `localization-parity.md`. Update the affected docs (and their timestamp lines and revision history) whenever work lands. `cargo xtask parity` regenerates `docs/parity-checklist.md` from `crates/engine/src/catalog.rs`.
 
 ## CI workflows
 - Workflows in `.github/workflows/` call the shared workflows in [`storytold/craft-common-actions`](https://github.com/storytold/craft-common-actions) at `@main`, with their inputs and secrets. No other jobs: if no shared workflow does what's needed, it doesn't go here.

Cargo.lock

@@ -220,7 +220,7 @@ dependencies = [
  "objc2-foundation 0.3.2",
  "parking_lot",
  "percent-encoding",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
  "wl-clipboard-rs",
  "x11rb",
 ]
@@ -889,12 +889,12 @@ dependencies = [
 [[package]]
 name = "craft-fonts-build"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 
 [[package]]
 name = "craft-i18n"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 dependencies = [
  "fixed_decimal",
  "icu_decimal",
@@ -917,9 +917,10 @@ dependencies = [
 [[package]]
 name = "craft-print"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 dependencies = [
  "craft-winprint-gdi",
+ "log",
  "miniz_oxide 0.9.1",
  "roxmltree",
  "tempfile",
@@ -930,7 +931,7 @@ dependencies = [
 [[package]]
 name = "craft-ui"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 dependencies = [
  "craft-fonts-build",
  "craft-i18n",
@@ -950,7 +951,7 @@ dependencies = [
 [[package]]
 name = "craft-update"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=04aa1703b32d299e54f78fcde4182f2b393a9116#04aa1703b32d299e54f78fcde4182f2b393a9116"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 dependencies = [
  "chrono",
  "dunce",
@@ -976,7 +977,7 @@ dependencies = [
 [[package]]
 name = "craft-window"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
 dependencies = [
  "egui",
  "objc2 0.6.5",
@@ -1456,7 +1457,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1936,7 +1937,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "arboard",
  "chrono",
@@ -1963,7 +1964,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-calc"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-core",
  "gridcraft-formula",
@@ -1975,7 +1976,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-chart"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-calc",
  "gridcraft-core",
@@ -1986,7 +1987,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-cli"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-engine",
  "gridcraft-mcp",
@@ -1998,7 +1999,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-core"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "chrono",
  "js-sys",
@@ -2009,7 +2010,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-engine"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-calc",
  "gridcraft-chart",
@@ -2031,7 +2032,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-formula"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-core",
  "serde",
@@ -2040,7 +2041,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-functions"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-core",
  "regex",
@@ -2048,7 +2049,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-mcp"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-engine",
  "log",
@@ -2057,7 +2058,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-model"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-core",
  "gridcraft-formula",
@@ -2069,18 +2070,18 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-numfmt"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-core",
 ]
 
 [[package]]
 name = "gridcraft-pdf"
-version = "0.13.0"
+version = "0.14.2"
 
 [[package]]
 name = "gridcraft-ui-egui"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "craft-ui",
  "craft-update",
@@ -2105,7 +2106,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-web"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "eframe",
  "egui",
@@ -2122,7 +2123,7 @@ dependencies = [
 
 [[package]]
 name = "gridcraft-xlsx"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "aes",
  "gridcraft-core",
@@ -3461,7 +3462,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d8fae84b431384b68627d0f9b3b1245fcf9f46f6c0e3dc902e9dce64edd1967"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3875,7 +3876,7 @@ dependencies = [
  "once_cell",
  "socket2",
  "tracing",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -4185,7 +4186,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.12.1",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -4244,7 +4245,7 @@ dependencies = [
  "security-framework",
  "security-framework-sys",
  "webpki-root-certs",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -4978,7 +4979,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix 1.1.5",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -5937,7 +5938,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -6403,7 +6404,7 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"
 
 [[package]]
 name = "xtask"
-version = "0.13.0"
+version = "0.14.2"
 dependencies = [
  "gridcraft-engine",
  "serde_json",

Cargo.toml

@@ -4,7 +4,7 @@ members = ["crates/*", "apps/*", "xtask"]
 default-members = ["crates/*", "apps/gridcraft", "apps/gridcraft-cli", "xtask"]
 
 [workspace.package]
-version = "0.13.0"
+version = "0.14.2"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
@@ -27,7 +27,7 @@ gridcraft-pdf = { path = "crates/pdf" }
 # Every craft-libs crate (craft-update and craft-window here, craft-ui in ui-egui, craft-print in
 # the app) comes from one storytold/craft-libs revision.
 # craft-update: app-specific pretend versions apply to startup and manual checks.
-craft-update = { git = "https://github.com/storytold/craft-libs", rev = "04aa1703b32d299e54f78fcde4182f2b393a9116", version = "=0.1.0", features = ["egui"] }
+craft-update = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7", version = "=0.1.0", features = ["egui"] }
 
 # foundation
 thiserror = "2"
@@ -63,7 +63,7 @@ skrifa = { version = "0.44", default-features = false, features = ["std"] }
 epaint_default_fonts = "0.37"
 # One native window per workbook: the window list, Window menu titles and the immediate-viewport
 # driver. Same craft-libs revision as craft-update above.
-craft-window = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "92d392cff132eaf53e13afff77f38b5c11b73aa0", default-features = false, features = ["egui"] }
+craft-window = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7", default-features = false, features = ["egui"] }
 
 [workspace.lints.rust]
 unsafe_code = "forbid"

ROADMAP.md

@@ -233,7 +233,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
 | 2026-10-11 | PivotCharts (`insert.pivotChart`): charts bound to a PivotTable's report, following refreshes and layout changes (#311) |
 | 2026-10-11 | FORECAST.ETS, FORECAST.ETS.CONFINT, FORECAST.ETS.SEASONALITY, FORECAST.ETS.STAT: AAA exponential smoothing forecasts (#314) |
 | 2026-10-11 | File tab Backstage view (Home, New, Open, Info, Save As, Print preview, Export, Options) and `file.options` (#174) |
-| 2026-10-10 | Ribbon translated into Japanese, Chinese, Korean, Brazilian Portuguese and Russian with system-language default (#31, #104, #82); CJK/Thai/Hebrew font fallback (#38); clear messages for encrypted and `.xls` files (#17); smooth line charts (#62). Progress docs restructured to the craftrules standard; full re-measure (this page). Initial ribbon key tips (#43), in-place text box editing (#84), copy as HTML table (#36). ODS and XLSB data import (#100, #101); recalc linear in the number of range formulas (#66); RISC-V Linux build; Flatpak repository on Pages; web cell-commit trap fixed |
+| 2026-10-10 | Ribbon translated into Japanese, Chinese, Korean, Brazilian Portuguese and Russian with system-language default (#31, #104, #82); CJK/Thai/Hebrew font fallback (#38); clear messages for encrypted and `.xls` files (#17); smooth line charts (#62). Progress docs restructured; full re-measure (this page). Initial ribbon key tips (#43), in-place text box editing (#84), copy as HTML table (#36). ODS and XLSB data import (#100, #101); recalc linear in the number of range formulas (#66); RISC-V Linux build; Flatpak repository on Pages; web cell-commit trap fixed |
 | 2026-10-09 | Community fixes: spill range operator `A1#`, sheet-scoped names, protection refuses locked-cell edits, Insert/Delete Cells adjust references, `DATE(1900,2,29)`, SUMIF sizing, `ROUND` at 15 digits, `_xlpm.` LAMBDA parameters in XLSX, vertical scrollbar, system appearance, border previews; v0.4.0 |
 | 2026-10-08 | v0.2.0 and v0.3.0 releases; Flatpak, AppImage zsync, branded DMG; desktop log file; DirectX 12 default on Windows |
 | 2026-10-07 | About window with contributor and model credits; macOS release runner |
@@ -296,5 +296,5 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
 | 2026-10-10 | minor | Readiness-by-audience table with hours to ~95% per audience; full number unchanged (additive weighted sum) |
 | 2026-10-10 | minor | Added Mainstream practitioner (~50%) and Essentials user (~63%); languages updated for the 10-10 merges (ribbon in ja, zh, ko, pt-BR, ru); localization 5%→10%; full number re-checked (51.6, unchanged) |
 | 2026-10-10 | minor | Checked against the alpha gate (six core workflows pass): stays alpha |
-| 2026-10-10 | major | Re-measured against Excel for Mac 16.113.4: stage alpha, breadth ~75%, ready ~50%, ~160–240 h to beta, ~700–1,100 h to full parity; restructured to the progress-docs standard; detail moved to `docs/` |
+| 2026-10-10 | major | Re-measured against Excel for Mac 16.113.4: stage alpha, breadth ~75%, ready ~50%, ~160–240 h to beta, ~700–1,100 h to full parity; progress docs restructured; detail moved to `docs/` |
 | 2026-10-07 | major | First estimates: catalog 89%, functions ~93%, depth ~65%, ~35 h to alpha, ~215 h to full parity |

apps/gridcraft/Cargo.toml

@@ -30,7 +30,7 @@ winit = { version = "0.30", default-features = false, features = ["x11"] }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # Same craft-libs revision as the workspace's craft-update and craft-window (see the root
 # Cargo.toml).
-craft-print = { git = "https://github.com/storytold/craft-libs", rev = "92d392cff132eaf53e13afff77f38b5c11b73aa0" }
+craft-print = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7" }
 craft-update = { workspace = true }
 rfd = { workspace = true }
 arboard = { workspace = true }

assets/app-icon/README.md

@@ -1,7 +1,7 @@
 # GridCraft app icon (PLACEHOLDER)
 
 **This icon is temporary.** Every Crafting App's icon is an engraved creature portrait that the
-product owner makes (craftrules `standards/icon-design.md`); GridCraft's hasn't been made yet.
+product owner makes; GridCraft's hasn't been made yet.
 Until it is, this placeholder stands in: a simple ledger page with a header row, a row-number
 column, a selected cell with its fill handle and a double rule under a total, on a full-bleed
 GridCraft-green tile. It is original geometry written by hand for this repository, deliberately

assets/app-icon/gridcraft.svg

@@ -1,7 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
   <!-- GridCraft PLACEHOLDER icon: a ledger page with a selected cell, on GridCraft green.
        Original work; temporary until the owner's engraved creature portrait replaces it
-       (craftrules standards/icon-design.md). Palette: ink #0b0b0c, paper #efe9dc,
+       Palette: ink #0b0b0c, paper #efe9dc,
        app colour #1f9d55 (proposed). -->
   <defs>
     <clipPath id="tile"><rect width="512" height="512" rx="112"/></clipPath>

assets/app-icon/hicolor/scalable/apps/ai.storyteller.gridcraft.svg

@@ -1,7 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
   <!-- GridCraft PLACEHOLDER icon: a ledger page with a selected cell, on GridCraft green.
        Original work; temporary until the owner's engraved creature portrait replaces it
-       (craftrules standards/icon-design.md). Palette: ink #0b0b0c, paper #efe9dc,
+       Palette: ink #0b0b0c, paper #efe9dc,
        app colour #1f9d55 (proposed). -->
   <defs>
     <clipPath id="tile"><rect width="512" height="512" rx="112"/></clipPath>

contributors/people.toml

@@ -1,13 +1,10 @@
-# Contributor names for the About window (craftrules standards/contributors.md).
+# Contributor names for the About window.
 #
 # Everyone who contributes is credited by GitHub username automatically. Anything more is up to
 # you: add YOUR OWN entry below, in your own PR (commit it yourself). Never add someone else; a
 # maintainer may add a person only when that person asked, recording where in consent_source.
 #
-# Easiest: python3 ../../craftrules/scripts/contributors.py --add-me . \
+# Copy this block, replacing your-github-username (every field is optional):
-#            [--real-name "Ada Lovelace"] [--display-name "Ada"] [--sync-github-name]
-#
-# Or copy this block, replacing your-github-username (every field is optional):
 #
 #   [people.your-github-username]
 #   real_name = "Your Name"        # shown when the viewer picks "Real name"

crates/engine/src/cmd/print/draw.rs

@@ -2,8 +2,8 @@ use super::layout::{DENSE_BLOCK, SheetLayout};
 use super::objects::draw_cell_picture;
 use super::text::{TextPlacement, draw_text};
 use super::{
-    BorderLine, BorderStyle, Borders, CellRef, Color, Font, Page, PatternType, Point, RangeRef, Rgb, Sheet, Style, StyleId, Underline, Workbook,
+    BorderLine, BorderStyle, Borders, CellRef, Color, Font, Page, PatternType, Point, RangeRef, Rgb, Sheet, Style, StyleId, Underline, Value,
-    split_sheet,
+    Workbook, split_sheet,
 };
 
 // ---------------------------------------------------------------- drawing
@@ -280,6 +280,7 @@ pub(super) fn draw_block(pg: &mut Page, b: &Block, gridlines: bool, cf: &mut Opt
                 || merges.iter().any(|m| m.start == *c)
                 || !sh.value(*c).is_empty()
                 || l.style.borders != Borders::default()
+                || l.style.num_fmt.as_str() == "checkbox"
         })
         .collect();
     let rect_of = |c: CellRef| -> (f32, f32, f32, f32, bool) {
@@ -343,6 +344,8 @@ pub(super) fn draw_block(pg: &mut Page, b: &Block, gridlines: bool, cf: &mut Opt
         }
         if let Some(picture) = sh.cell_pictures.get(c) {
             draw_cell_picture(pg, &picture.data, (x, y, w, h), b.k);
+        } else if let Some(on) = checkbox_state(l, &sh.value(*c)) {
+            draw_checkbox(pg, (x, y, w, h), b.k, on);
         } else {
             draw_text(pg, b, TextPlacement { cell: *c, look: l, rect: (x, y, w, h), merged, merges: &merges, limits: (bx, bx + bw) });
         }
@@ -350,6 +353,37 @@ pub(super) fn draw_block(pg: &mut Page, b: &Block, gridlines: bool, cf: &mut Opt
     pg.restore();
 }
 
+/// A checkbox cell prints TRUE/FALSE (and empty) as a box, as on screen (#2972); other values
+/// print as text.
+fn checkbox_state(l: &Look, v: &Value) -> Option<bool> {
+    if l.style.num_fmt.as_str() != "checkbox" || l.cf.as_ref().is_some_and(|cf| cf.hide_value) {
+        return None;
+    }
+    match v {
+        Value::Bool(on) => Some(*on),
+        Value::Empty => Some(false),
+        _ => None,
+    }
+}
+
+/// A checkbox centred in the cell: white with a grey outline, or green with a white tick.
+fn draw_checkbox(pg: &mut Page, (x, y, w, h): (f32, f32, f32, f32), k: f32, on: bool) {
+    let s = (13.2 * k).min(w - 2.0 * k).min(h - 2.0 * k);
+    if s <= 0.0 {
+        return;
+    }
+    let (bx, by) = (x + (w - s) / 2.0, y + (h - s) / 2.0);
+    let corners = [[bx, by], [bx + s, by], [bx + s, by + s], [bx, by + s]];
+    if on {
+        let green = [0x10, 0x7C, 0x41];
+        pg.polygon(&corners, Some(green), Some((green, 0.75 * k)));
+        let tick = [[bx + 0.22 * s, by + 0.52 * s], [bx + 0.42 * s, by + 0.72 * s], [bx + 0.78 * s, by + 0.30 * s]];
+        pg.polyline(&tick, 0.14 * s, [0xFF, 0xFF, 0xFF], &[]);
+    } else {
+        pg.polygon(&corners, Some([0xFF, 0xFF, 0xFF]), Some(([110, 110, 110], 0.75 * k)));
+    }
+}
+
 pub(super) struct PendingPdfLink {
     pub(super) page: usize,
     pub(super) sheet: usize,

crates/engine/src/cmd/print/tests.rs

@@ -565,3 +565,19 @@ fn rotated_wrapped_text_prints_rotated() {
     assert_eq!(up + down, blocks.len(), "a header line printed flat: {blocks:?}");
     assert!((1..=3).contains(&up) && (1..=3).contains(&down), "up {up}, down {down}: {blocks:?}");
 }
+
+#[test]
+fn checkbox_cells_print_as_boxes_not_true_false() {
+    // #2972: a checkbox cell printed its value as TRUE or FALSE.
+    let mut s = s();
+    s.execute("insert.checkbox", json!({"range": "A1:A2"})).unwrap();
+    s.execute("cell.toggleCheckbox", json!({"cell": "A2"})).unwrap();
+    s.execute("cell.set", json!({"cell": "C1", "input": "TRUE"})).unwrap();
+    let (pdf, _) = pdf_of(&mut s, json!({}));
+    assert!(!contains(&pdf, "(FALSE) Tj"), "the unchecked box printed as FALSE");
+    // Only the plain TRUE in C1 prints as text; the checked box is a filled box.
+    let text = String::from_utf8_lossy(&pdf);
+    assert_eq!(text.matches("(TRUE) Tj").count(), 1, "the checked box printed as TRUE");
+    assert!(contains(&pdf, "0.063 0.486 0.255 rg"), "the checked box is not filled");
+    assert!(contains(&pdf, "0.431 0.431 0.431 RG"), "the unchecked box is not outlined");
+}

crates/formula/src/printer.rs

@@ -175,8 +175,8 @@ fn write_struct_ref(s: &StructRef, at_shorthand: bool) -> String {
             let _ = write!(out, "[{}]", s.specifiers.first().map(item).unwrap_or(""));
         }
         (Some(c), None) if s.specifiers.is_empty() => {
-            // Excel writes a name with spaces at its edges in the double-bracket form.
+            // Names with spaces at their edges, or starting with `@` (this-row shorthand), use the double-bracket form.
-            if c.trim() == c {
+            if c.trim() == c && !c.starts_with('@') {
                 let _ = write!(out, "[{}]", esc(c));
             } else {
                 let _ = write!(out, "[[{}]]", esc(c));

crates/formula/src/tests.rs

@@ -558,3 +558,12 @@ fn reference_shapes_print_unchanged() -> Result<(), Box<dyn std::error::Error>>
     }
     Ok(())
 }
+
+#[test]
+fn column_starting_with_at_round_trips() {
+    for name in ["@a", "a@b"] {
+        let s = StructRef { table: "T".into(), specifiers: vec![], col_start: Some(name.into()), col_end: None };
+        let text = format!("={}", printer::struct_ref(&s));
+        assert_eq!(parse(&text).ok(), Some(Expr::Struct(s)), "printed as {text}");
+    }
+}

crates/functions/src/date.rs

@@ -449,13 +449,15 @@ pub(crate) fn yearfrac_core(sys: DateSystem, s: i64, e: i64, basis: i64) -> R<f6
     Ok(match basis {
         0 => {
             let (mut a, mut b) = (d1.day as i64, d2.day as i64);
+            // Excel tests the end-31 rule against the original start day, before a February end moves to 30.
+            let start_30 = a >= 30;
             if last_of_feb(&d1) && last_of_feb(&d2) {
                 b = 30;
             }
             if last_of_feb(&d1) || a == 31 {
                 a = 30;
             }
-            if a == 30 && b == 31 {
+            if start_30 && b == 31 {
                 b = 30;
             }
             ((d2.year as i64 - d1.year as i64) * 360 + (d2.month as i64 - d1.month as i64) * 30 + b - a) as f64 / 360.0
@@ -817,8 +819,13 @@ mod tests {
 
     #[test]
     fn yearfrac_basis0_feb_end_to_31() {
-        close(ev("YEARFRAC", vec![n(d(2021.0, 2.0, 28.0)), n(d(2021.0, 3.0, 31.0)), n(0.0)]), 30.0 / 360.0);
+        // Excel 16: a February-end start keeps its original day for the end-31 test, so 31 days.
-        close(ev("YEARFRAC", vec![n(d(2020.0, 2.0, 29.0)), n(d(2020.0, 3.0, 31.0)), n(0.0)]), 30.0 / 360.0);
+        close(ev("YEARFRAC", vec![n(d(2021.0, 2.0, 28.0)), n(d(2021.0, 3.0, 31.0)), n(0.0)]), 0.086_111_111_111_111_11);
+        close(ev("YEARFRAC", vec![n(d(2020.0, 2.0, 29.0)), n(d(2020.0, 3.0, 31.0)), n(0.0)]), 0.086_111_111_111_111_11);
+        close(ev("YEARFRAC", vec![n(d(2021.0, 3.0, 31.0)), n(d(2021.0, 2.0, 28.0)), n(0.0)]), 0.086_111_111_111_111_11);
+        close(ev("YEARFRAC", vec![n(d(2021.0, 1.0, 31.0)), n(d(2021.0, 2.0, 28.0)), n(0.0)]), 0.077_777_777_777_777_78);
+        close(ev("YEARFRAC", vec![n(d(2021.0, 1.0, 30.0)), n(d(2021.0, 3.0, 31.0)), n(0.0)]), 1.0 / 6.0);
+        close(ev("YEARFRAC", vec![n(d(2020.0, 2.0, 29.0)), n(d(2021.0, 2.0, 28.0)), n(0.0)]), 1.0);
         close(ev("YEARFRAC", vec![n(d(2021.0, 2.0, 28.0)), n(d(2021.0, 2.0, 28.0)), n(0.0)]), 0.0);
     }
 

crates/functions/src/engineering.rs

@@ -25,7 +25,7 @@ fn base_source(a: &[Arg]) -> R<String> {
             Ok(number_to_text(n))
         }
         Value::Empty => Ok(String::new()),
-        v => Ok(v.to_text()?.trim().to_string()),
+        v => Ok(v.to_text()?.to_string()),
     }
 }
 
@@ -62,6 +62,15 @@ fn format_base(v: i64, radix: u32, places: Option<f64>) -> R<Value> {
     if v < min || v > max {
         return Err(CellError::Num);
     }
+    let places = places
+        .map(|p| {
+            let p = p.trunc();
+            if !(1.0..=10.0).contains(&p) {
+                return Err(CellError::Num);
+            }
+            Ok(p as usize)
+        })
+        .transpose()?;
     if v < 0 {
         let u = v + (1i64 << bits);
         return text_val(to_radix(u, radix));
@@ -70,11 +79,6 @@ fn format_base(v: i64, radix: u32, places: Option<f64>) -> R<Value> {
     match places {
         None => text_val(s),
         Some(p) => {
-            let p = p.trunc();
-            if !(1.0..=10.0).contains(&p) {
-                return Err(CellError::Num);
-            }
-            let p = p as usize;
             if s.len() > p {
                 return Err(CellError::Num);
             }
@@ -97,7 +101,13 @@ fn to_radix(mut v: i64, radix: u32) -> String {
 }
 
 fn places_arg(a: &[Arg]) -> R<Option<f64>> {
-    if has(a, 1) { Ok(Some(num(a, 1)?)) } else { Ok(None) }
+    if !has(a, 1) {
+        return Ok(None);
+    }
+    if matches!(a.get(1).map(scalar), Some(Value::Bool(_))) {
+        return Err(CellError::Value);
+    }
+    Ok(Some(num(a, 1)?))
 }
 
 fn convert_base(a: &[Arg], from: u32, to: u32) -> R<Value> {
@@ -175,6 +185,9 @@ fn bitxor(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
 fn shift(a: &[Arg], left: bool) -> R<Value> {
     let n = bit_operand(a, 0)?;
     let s = num(a, 1)?.trunc();
+    if n == 0 {
+        return Ok(Value::Number(0.0));
+    }
     if s.abs() > 53.0 {
         return Err(CellError::Num);
     }
@@ -402,6 +415,12 @@ mod tests {
         is_text(ev("BIN2OCT", vec![n(1111111111.0)]), "7777777777");
         is_text(ev("DEC2BIN", vec![n(9.0), n(4.0)]), "1001");
         is_text(ev("DEC2BIN", vec![n(-100.0)]), "1110011100");
+        is_err(ev("DEC2BIN", vec![n(-1.0), n(0.0)]), CellError::Num);
+        is_err(ev("DEC2HEX", vec![n(-1.0), n(11.0)]), CellError::Num);
+        is_err(ev("DEC2OCT", vec![n(-1.0), n(-1.0)]), CellError::Num);
+        is_err(ev("DEC2BIN", vec![n(1.0), crate::Arg::val(Value::Bool(true))]), CellError::Value);
+        is_text(ev("DEC2BIN", vec![n(-1.0), n(1.0)]), "1111111111");
+        is_text(ev("DEC2HEX", vec![n(-1.0), n(10.0)]), "FFFFFFFFFF");
         is_err(ev("DEC2BIN", vec![n(512.0)]), CellError::Num);
         is_text(ev("DEC2HEX", vec![n(100.0), n(4.0)]), "0064");
         is_text(ev("DEC2HEX", vec![n(-54.0)]), "FFFFFFFFCA");
@@ -426,6 +445,21 @@ mod tests {
         is_text(ev("OCT2HEX", vec![n(100.0), n(4.0)]), "0040");
         is_text(ev("OCT2HEX", vec![n(7777777533.0)]), "FFFFFFFF5B");
         is_err(ev("BIN2DEC", vec![n(102.0)]), CellError::Num);
+        for (f, input) in [
+            ("BIN2DEC", " 10"),
+            ("BIN2DEC", "10 "),
+            ("BIN2DEC", "\t10"),
+            ("BIN2HEX", " 10"),
+            ("BIN2OCT", "10 "),
+            ("HEX2DEC", " 10"),
+            ("HEX2BIN", "10 "),
+            ("HEX2OCT", "\t10"),
+            ("OCT2DEC", " 10"),
+            ("OCT2BIN", "10 "),
+            ("OCT2HEX", "\t10"),
+        ] {
+            is_err(ev(f, vec![t(input)]), CellError::Num);
+        }
         is_err(ev("HEX2DEC", vec![t("GG")]), CellError::Num);
         is_err(ev("BIN2DEC", vec![t("11111111111")]), CellError::Num);
         is_err(ev("DEC2BIN", vec![t("abc")]), CellError::Value);
@@ -446,6 +480,21 @@ mod tests {
         is_err(ev("BITAND", vec![n(1.5), n(5.0)]), CellError::Num);
         is_err(ev("BITLSHIFT", vec![n(1.0), n(54.0)]), CellError::Num);
         is_err(ev("BITLSHIFT", vec![n(2f64.powi(47)), n(1.0)]), CellError::Num);
+        for f in ["BITLSHIFT", "BITRSHIFT"] {
+            for shift in [-100.0, -54.0, -53.0, 53.0, 54.0, 100.0] {
+                close(ev(f, vec![n(0.0), n(shift)]), 0.0);
+            }
+            for shift in [-100.0, -54.0, 54.0, 100.0] {
+                is_err(ev(f, vec![n(1.0), n(shift)]), CellError::Num);
+            }
+            if f == "BITLSHIFT" {
+                is_err(ev(f, vec![n(1.0), n(53.0)]), CellError::Num);
+            } else {
+                close(ev(f, vec![n(1.0), n(53.0)]), 0.0);
+            }
+            is_err(ev(f, vec![n(0.0), t("bad")]), CellError::Value);
+        }
+        is_err(ev("BITRSHIFT", vec![n(-1.0), n(100.0)]), CellError::Num);
     }
 
     #[test]

crates/functions/src/math.rs

@@ -314,6 +314,10 @@ fn modulo(x: f64, d: f64) -> R<f64> {
     if d == 0.0 {
         return Err(CellError::Div0);
     }
+    // Excel returns #NUM! once the quotient magnitude reaches 1.1259E12 (checked against Excel 16).
+    if (x / d).abs() >= 1.1259e12 {
+        return Err(CellError::Num);
+    }
     // `%` is an exact remainder (truncated), so |r| < |d| even for tiny divisors.
     let r = x % d;
     // Keep the sign of the divisor and avoid returning |d| from rounding.

crates/functions/src/math/tests.rs

@@ -140,16 +140,22 @@ fn rounding() {
 }
 
 #[test]
-fn mod_tiny_divisor_stays_in_range() {
+fn mod_quotient_limit() {
-    for (x, d) in [(3.0, 1e-300), (-1.0, 1e-300), (3.0, -1e-300), (-1.0, -1e-300)] {
+    // Excel 16: #NUM! whenever |number / divisor| >= 1.1259E12.
-        match ev2("MOD", x, d) {
+    for (x, d) in [
-            Value::Number(r) => {
+        (3.0, 1e-300),
-                assert!(r == 0.0 || (r < 0.0) == (d < 0.0), "MOD({x}, {d}) = {r}");
+        (-1.0, 1e-300),
-                assert!(r.abs() < d.abs(), "MOD({x}, {d}) = {r}");
+        (3.0, -1e-300),
-            }
+        (-1.0, -1e-300),
-            other => panic!("MOD({x}, {d}) = {other:?}"),
+        (1e15, 7.0),
-        }
+        (1e10, 0.001),
+        (1_125_900_000_000.0, 1.0),
+        (-1_125_900_000_000.0, 1.0),
+    ] {
+        is_err(ev2("MOD", x, d), Num);
     }
+    close(ev2("MOD", 1e12 * 7.0 + 3.0, 7.0), 3.0);
+    close(ev2("MOD", 1_125_899_999_999.99, 1.0), 0.989_990_234_375);
 }
 
 #[test]

crates/functions/src/stat/descriptive.rs

@@ -336,6 +336,10 @@ pub(super) fn percentrank_impl(a: &[Arg], exc: bool) -> R<Value> {
     if sig < 1.0 || s.is_empty() {
         return Err(CellError::Num);
     }
+    // Excel: 10^significance overflows from 309 up.
+    if sig >= 309.0 {
+        return Err(CellError::Div0);
+    }
     let (first, last) = (s.first().copied().unwrap_or(0.0), s.last().copied().unwrap_or(0.0));
     if x < first || x > last {
         return Err(CellError::NA);
@@ -359,6 +363,10 @@ pub(super) fn percentrank_impl(a: &[Arg], exc: bool) -> R<Value> {
         let (rl, rh) = (rank_of(lo), rank_of(hi));
         rl + (x - lo) / (hi - lo) * (rh - rl)
     };
+    // From significance 15 up Excel returns 15 significant digits, rounded.
+    if sig >= 15.0 {
+        return num_val(format!("{r:.14e}").parse().unwrap_or(r));
+    }
     num_val(trunc_digits(r, sig))
 }
 
@@ -420,7 +428,10 @@ pub(super) fn geomean(v: &[f64]) -> R<f64> {
 }
 
 pub(super) fn harmean(v: &[f64]) -> R<f64> {
-    if v.is_empty() || v.iter().any(|&x| x <= 0.0) {
+    if v.is_empty() {
+        return Err(CellError::NA);
+    }
+    if v.iter().any(|&x| x <= 0.0) {
         return Err(CellError::Num);
     }
     Ok(v.len() as f64 / v.iter().map(|x| 1.0 / x).sum::<f64>())

crates/functions/src/stat/distributions.rs

@@ -22,7 +22,14 @@ fn t_cdf(t: f64, v: f64) -> f64 {
 }
 
 fn t_pdf(t: f64, v: f64) -> f64 {
-    (ln_gamma((v + 1.0) / 2.0) - ln_gamma(v / 2.0) - 0.5 * (v * std::f64::consts::PI).ln() - (v + 1.0) / 2.0 * (1.0 + t * t / v).ln()).exp()
+    let z = v / 2.0;
+    let log_gamma_ratio = if z >= 16.0 {
+        let inv_z = 1.0 / z;
+        0.5 * z.ln() - inv_z / 8.0 + inv_z.powi(3) / 192.0 - inv_z.powi(5) / 640.0 + 17.0 * inv_z.powi(7) / 14_336.0
+    } else {
+        ln_gamma(z + 0.5) - ln_gamma(z)
+    };
+    (log_gamma_ratio - 0.5 * (v.ln() + std::f64::consts::PI.ln()) - (v + 1.0) / 2.0 * (t * t / v).ln_1p()).exp()
 }
 
 /// t ≥ 0 with P(T > t) = q, q in (0, 0.5].
@@ -51,6 +58,12 @@ fn f_cdf(x: f64, d1: f64, d2: f64) -> f64 {
     if x <= 0.0 {
         return 0.0;
     }
+    if x == 1.0 && d1 == d2 {
+        return 0.5;
+    }
+    if d1 >= 1e8 && d2 / d1 <= 1e-8 {
+        return reg_gamma_q(d2 / 2.0, d2 / (2.0 * (x + d2 / d1)));
+    }
     reg_inc_beta(d1 * x / (d1 * x + d2), d1 / 2.0, d2 / 2.0)
 }
 
@@ -58,6 +71,10 @@ fn f_upper(x: f64, d1: f64, d2: f64) -> f64 {
     if x <= 0.0 {
         return 1.0;
     }
+    if d1 >= 1e8 && d2 / d1 <= 1e-8 {
+        // With a much larger numerator degree, the scaled beta tail converges to a gamma tail.
+        return reg_gamma_p(d2 / 2.0, d2 / (2.0 * (x + d2 / d1)));
+    }
     reg_inc_beta(d2 / (d2 + d1 * x), d2 / 2.0, d1 / 2.0)
 }
 
@@ -74,6 +91,8 @@ fn f_pdf(x: f64, d1: f64, d2: f64) -> f64 {
     ((d1 / 2.0) * (d1 / d2).ln() + (d1 / 2.0 - 1.0) * x.ln() - ((d1 + d2) / 2.0) * (1.0 + d1 * x / d2).ln() - ln_beta(d1 / 2.0, d2 / 2.0)).exp()
 }
 
+const MAX_BINOM_TRIALS: f64 = 2_147_483_646.0;
+
 fn binom_pmf(k: f64, n: f64, p: f64) -> f64 {
     if k < 0.0 || k > n {
         return 0.0;
@@ -176,8 +195,14 @@ fn df_arg(a: &[Arg], i: usize) -> R<f64> {
 
 pub(super) fn t_dist(a: &[Arg], _: C) -> R<Value> {
     let x = num(a, 0)?;
-    let v = df_arg(a, 1)?;
+    let v = num(a, 1)?.trunc();
     let cum = boolean(a, 2)?;
+    if v == 0.0 {
+        return Err(if cum { CellError::Num } else { CellError::Div0 });
+    }
+    if v < 0.0 {
+        return Err(CellError::Num);
+    }
     num_val(if cum { t_cdf(x, v) } else { t_pdf(x, v) })
 }
 
@@ -209,6 +234,9 @@ pub(super) fn tdist_legacy(a: &[Arg], _: C) -> R<Value> {
 pub(super) fn t_inv(a: &[Arg], _: C) -> R<Value> {
     let p = num(a, 0)?;
     let v = df_arg(a, 1)?;
+    if p == 0.0 {
+        return Err(CellError::Div0);
+    }
     if !(p > 0.0 && p < 1.0) {
         return Err(CellError::Num);
     }
@@ -347,7 +375,7 @@ fn f_args(a: &[Arg]) -> R<(f64, f64, f64)> {
     let x = num(a, 0)?;
     let d1 = num(a, 1)?.trunc();
     let d2 = num(a, 2)?.trunc();
-    if d1 < 1.0 || d2 < 1.0 || d1 >= 1e10 || d2 >= 1e10 {
+    if d1 < 1.0 || d2 < 1.0 || d1 > 1e10 || d2 > 1e10 {
         return Err(CellError::Num);
     }
     Ok((x, d1, d2))
@@ -378,7 +406,8 @@ pub(super) fn f_inv(a: &[Arg], _: C) -> R<Value> {
     if p == 0.0 {
         return num_val(0.0);
     }
-    num_val(invert(|x| f_cdf(x, d1, d2), p, 0.0, 1.0, 1e60))
+    let value = if p < 0.5 { invert(|x| f_cdf(x, d1, d2), p, 0.0, 1.0, 1e60) } else { invert(|x| f_upper(x, d1, d2), 1.0 - p, 0.0, 1.0, 1e60) };
+    num_val(value)
 }
 
 pub(super) fn f_inv_rt(a: &[Arg], _: C) -> R<Value> {
@@ -410,7 +439,7 @@ pub(super) fn binom_dist(a: &[Arg], _: C) -> R<Value> {
     let n = num(a, 1)?.trunc();
     let p = num(a, 2)?;
     let cum = boolean(a, 3)?;
-    if k < 0.0 || k > n || !(0.0..=1.0).contains(&p) {
+    if k < 0.0 || n > MAX_BINOM_TRIALS || k > n || !(0.0..=1.0).contains(&p) {
         return Err(CellError::Num);
     }
     num_val(if cum { binom_cdf(k, n, p) } else { binom_pmf(k, n, p) })
@@ -421,7 +450,7 @@ pub(super) fn binom_dist_range(a: &[Arg], _: C) -> R<Value> {
     let p = num(a, 1)?;
     let s1 = num(a, 2)?.trunc();
     let s2 = if has(a, 3) { num(a, 3)?.trunc() } else { s1 };
-    if !(0.0..=1e15).contains(&n) || !(0.0..=1.0).contains(&p) || s1 < 0.0 || s1 > n || s2 < s1 || s2 > n {
+    if !(0.0..=MAX_BINOM_TRIALS).contains(&n) || !(0.0..=1.0).contains(&p) || s1 < 0.0 || s1 > n || s2 < s1 || s2 > n {
         return Err(CellError::Num);
     }
     if s2 - s1 > 10_000.0 {
@@ -499,13 +528,7 @@ pub(super) fn gamma_dist(a: &[Arg], _: C) -> R<Value> {
         return num_val(reg_gamma_p(al, x / be));
     }
     if x == 0.0 {
-        return if al < 1.0 {
+        return if al <= 1.0 { Err(CellError::Num) } else { num_val(0.0) };
-            Err(CellError::Num)
-        } else if al == 1.0 {
-            num_val(1.0 / be)
-        } else {
-            num_val(0.0)
-        };
     }
     num_val(((al - 1.0) * x.ln() - x / be - al * be.ln() - ln_gamma(al)).exp())
 }
@@ -548,7 +571,7 @@ pub(super) fn beta_dist(a: &[Arg], _: C) -> R<Value> {
     if cum {
         return num_val(reg_inc_beta(z, al, be));
     }
-    if (z == 0.0 && al < 1.0) || (z == 1.0 && be < 1.0) {
+    if (z == 0.0 && al <= 1.0) || (z == 1.0 && be <= 1.0) {
         return Err(CellError::Num);
     }
     let lp = if z == 0.0 || z == 1.0 {
@@ -608,6 +631,9 @@ pub(super) fn weibull_dist(a: &[Arg], _: C) -> R<Value> {
     if x < 0.0 || al <= 0.0 || be <= 0.0 {
         return Err(CellError::Num);
     }
+    if x == 0.0 {
+        return num_val(0.0);
+    }
     let t = (x / be).powf(al);
     num_val(if cum { -(-t).exp_m1() } else { al / be.powf(al) * x.powf(al - 1.0) * (-t).exp() })
 }

crates/functions/src/stat/tests.rs

@@ -151,6 +151,19 @@ fn spread() {
     let g = [4.0, 5.0, 8.0, 7.0, 11.0, 4.0, 3.0];
     close_tol(ev("GEOMEAN", vec![c(&g)]), 5.476986969, 1e-9);
     close_tol(ev("HARMEAN", vec![c(&g)]), 5.028375962, 1e-9);
+    let text_values = arr(vec![vec![tv("1"), tv("2")]]);
+    let bool_values = arr(vec![vec![Value::Bool(true), Value::Bool(false)]]);
+    let mixed_values = arr(vec![vec![nv(2.0), tv("ignored"), Value::Bool(true)]]);
+    is_err(ev("HARMEAN", vec![av(text_values.clone())]), CellError::NA);
+    is_err(ev("HARMEAN", vec![av(bool_values.clone())]), CellError::NA);
+    is_err(ev("HARMEAN", vec![rf(text_values)]), CellError::NA);
+    is_err(ev("HARMEAN", vec![rf(bool_values)]), CellError::NA);
+    close(ev("HARMEAN", vec![av(mixed_values.clone())]), 2.0);
+    close(ev("HARMEAN", vec![rf(mixed_values)]), 2.0);
+    close(ev("HARMEAN", vec![b(true)]), 1.0);
+    close(ev("HARMEAN", vec![n(2.0), n(4.0)]), 8.0 / 3.0);
+    is_err(ev("HARMEAN", vec![av(arr(vec![vec![nv(0.0)]]))]), CellError::Num);
+    is_err(ev("HARMEAN", vec![av(arr(vec![vec![nv(-1.0)]]))]), CellError::Num);
     is_err(ev("GEOMEAN", vec![c(&[1.0, 0.0])]), CellError::Num);
     close_tol(ev("TRIMMEAN", vec![c(&[4.0, 5.0, 6.0, 7.0, 2.0, 3.0, 4.0, 5.0, 1.0, 2.0, 3.0]), n(0.2)]), 3.777777778, 1e-9);
     is_err(ev("TRIMMEAN", vec![c(&[1.0]), n(1.0)]), CellError::Num);
@@ -214,10 +227,19 @@ fn percentiles() {
     close(ev("PERCENTRANK.EXC", vec![e9.clone(), n(5.43)]), 0.381);
     close(ev("PERCENTRANK.EXC", vec![e9, n(5.43), n(1.0)]), 0.3);
     let t = c(&[1.0, 2.0, 3.0]);
-    close(ev("PERCENTRANK", vec![t.clone(), n(2.0), n(400.0)]), 0.5);
+    // Excel 16: significance 309 and up is #DIV/0!, 308 still works.
-    close(ev("PERCENTRANK.INC", vec![t.clone(), n(2.0), n(400.0)]), 0.5);
+    for name in ["PERCENTRANK", "PERCENTRANK.INC", "PERCENTRANK.EXC"] {
-    close(ev("PERCENTRANK.INC", vec![t.clone(), n(1.0), n(400.0)]), 0.0);
+        is_err(ev(name, vec![t.clone(), n(2.0), n(309.0)]), CellError::Div0);
-    close(ev("PERCENTRANK.EXC", vec![t, n(2.0), n(400.0)]), 0.5);
+        is_err(ev(name, vec![t.clone(), n(1.0), n(400.0)]), CellError::Div0);
+        close(ev(name, vec![t.clone(), n(2.0), n(308.0)]), 0.5);
+    }
+    // From significance 15 up the result has 15 significant digits.
+    let k = c(&[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0]);
+    for sig in [15.0, 16.0, 308.0] {
+        close_tol(ev("PERCENTRANK.INC", vec![k.clone(), n(2.123_456_789), n(sig)]), 0.187_242_798_166_667, 1e-16);
+    }
+    close_tol(ev("PERCENTRANK.INC", vec![k.clone(), n(2.123_456_789), n(14.0)]), 0.187_242_798_166_66, 1e-15);
+    close(ev("PERCENTRANK.EXC", vec![k, n(2.123_456_789), n(16.0)]), 0.265_432_098_625);
 }
 
 #[test]
@@ -360,6 +382,7 @@ fn normal() {
 
 #[test]
 fn t_chi_f() {
+    close_tol(ev("T.DIST", vec![n(0.0), n(6e307), b(false)]), 0.3989422804, 1e-10);
     close_tol(ev("T.DIST", vec![n(60.0), n(1.0), b(true)]), 0.99469533, D7);
     close_tol(ev("T.DIST", vec![n(8.0), n(3.0), b(false)]), 0.00073691, 1e-5);
     close_tol(ev("T.DIST.2T", vec![n(1.959999998), n(60.0)]), 0.054644930, D7);
@@ -397,6 +420,7 @@ fn t_chi_f() {
     close_tol(ev("F.DIST.RT", vec![n(15.2069), n(6.0), n(4.0)]), 0.01, 1e-6);
     close_tol(ev("FDIST", vec![n(15.2069), n(6.0), n(4.0)]), 0.01, 1e-6);
     close_tol(ev("F.INV", vec![n(0.01), n(6.0), n(4.0)]), 0.10930991, D7);
+    close_tol(ev("F.INV", vec![n(0.99), n(6.0), n(4.0)]), 15.20686, D7);
     close_tol(ev("F.INV.RT", vec![n(0.01), n(6.0), n(4.0)]), 15.20686, D7);
     close_tol(ev("FINV", vec![n(0.01), n(6.0), n(4.0)]), 15.20686, D7);
     close_tol(ev("F.TEST", vec![c(&[6.0, 7.0, 9.0, 15.0, 21.0]), c(&[20.0, 28.0, 31.0, 38.0, 40.0])]), 0.64831785, D7);
@@ -404,6 +428,48 @@ fn t_chi_f() {
     is_err(ev("F.DIST", vec![n(1.0), n(0.0), n(4.0), b(true)]), CellError::Num);
 }
 
+#[test]
+fn f_distributions_accept_ten_billion_degrees() {
+    close_tol(ev("F.DIST", vec![n(0.0), n(10_000_000_000.0), n(1.0), b(false)]), 0.0, 0.0);
+    close_tol(ev("F.DIST.RT", vec![n(0.0), n(1.0), n(10_000_000_000.0)]), 1.0, 0.0);
+    close_tol(ev("F.DIST", vec![n(0.01), n(1_000_000_000.0), n(1.0), b(true)]), 1.52397e-23, 1e-28);
+    close_tol(ev("F.DIST", vec![n(1.0), n(10_000_000_000.0), n(10_000_000_000.0), b(true)]), 0.5, 0.0);
+    close_tol(ev("F.DIST", vec![n(1_000_000.0), n(10_000_000_000.0), n(1.0), b(true)]), 0.999202115, 1e-8);
+    close_tol(ev("F.INV", vec![n(0.5), n(10_000_000_000.0), n(1.0)]), 2.198110953542527, 2e-6);
+    close_tol(ev("F.DIST.RT", vec![n(0.0), n(9_999_999_999.0), n(1.0)]), 1.0, 0.0);
+    is_err(ev("F.DIST.RT", vec![n(0.0), n(10_000_000_001.0), n(1.0)]), CellError::Num);
+    is_err(ev("F.DIST.RT", vec![n(0.0), n(1.0), n(10_000_000_001.0)]), CellError::Num);
+}
+
+#[test]
+fn t_dist_zero_degrees_error_depends_on_mode() {
+    for df in [0.0, 0.9, -0.1] {
+        is_err(ev("T.DIST", vec![n(0.0), n(df), b(false)]), CellError::Div0);
+        is_err(ev("T.DIST", vec![n(0.0), n(df), b(true)]), CellError::Num);
+    }
+    is_err(ev("T.DIST", vec![n(0.0), n(-1.0), b(false)]), CellError::Num);
+    close_tol(ev("T.DIST", vec![n(0.0), n(1.99), b(false)]), 1.0 / std::f64::consts::PI, 1e-15);
+    close_tol(ev("T.DIST", vec![n(0.0), n(1.0), b(false)]), 1.0 / std::f64::consts::PI, 1e-15);
+}
+
+#[test]
+fn t_density_is_stable_for_large_degrees() {
+    close_tol(ev("T.DIST", vec![n(0.0), n(100_000_000.0), b(false)]), 0.398942279404077, 1e-12);
+    close_tol(ev("T.DIST", vec![n(0.0), n(10_000_000_000.0), b(false)]), 0.3989422803914591, 1e-12);
+    close_tol(ev("T.DIST", vec![n(1.0), n(10_000_000_000_000_000.0), b(false)]), 0.24197072451914337, 1e-12);
+}
+
+#[test]
+fn t_inv_zero_probability_returns_div0() {
+    is_err(ev("T.INV", vec![n(-0.1), n(1.0)]), CellError::Num);
+    is_err(ev("T.INV", vec![n(0.0), n(1.0)]), CellError::Div0);
+    close_tol(ev("T.INV", vec![n(0.75), n(2.0)]), 0.8164966, D7);
+    is_err(ev("T.INV", vec![n(1.0), n(1.0)]), CellError::Num);
+    is_err(ev("T.INV", vec![n(1.1), n(1.0)]), CellError::Num);
+    is_err(ev("T.INV", vec![n(0.0), n(0.0)]), CellError::Num);
+    is_err(ev("T.INV.2T", vec![n(0.0), n(1.0)]), CellError::Num);
+}
+
 #[test]
 fn binom_inv_huge_trials_returns() {
     // Above 2^53 neighbouring f64 values are more than 1 apart; the bisection must still end.
@@ -427,7 +493,15 @@ fn discrete() {
     close_tol(ev("BINOM.DIST", vec![n(6.0), n(10.0), n(0.5), b(false)]), 0.205078125, 1e-12);
     close_tol(ev("BINOM.DIST", vec![n(6.0), n(10.0), n(0.5), b(true)]), 0.828125, 1e-12);
     close_tol(ev("BINOMDIST", vec![n(6.0), n(10.0), n(0.5), b(false)]), 0.205078125, 1e-12);
+    close(ev("BINOM.DIST", vec![n(1.0), n(2_147_483_646.0), n(0.0), b(false)]), 0.0);
+    close(ev("BINOM.DIST", vec![n(1.0), n(2_147_483_646.9), n(0.0), b(false)]), 0.0);
+    is_err(ev("BINOM.DIST", vec![n(1.0), n(2_147_483_647.0), n(0.0), b(false)]), CellError::Num);
+    is_err(ev("BINOM.DIST", vec![n(1.0), n(2_147_483_647.9), n(0.0), b(false)]), CellError::Num);
     is_err(ev("BINOM.DIST", vec![n(11.0), n(10.0), n(0.5), b(false)]), CellError::Num);
+    close(ev("BINOM.DIST.RANGE", vec![n(2_147_483_646.0), n(0.0), n(1.0)]), 0.0);
+    close(ev("BINOM.DIST.RANGE", vec![n(2_147_483_646.9), n(0.0), n(1.0)]), 0.0);
+    is_err(ev("BINOM.DIST.RANGE", vec![n(2_147_483_647.0), n(0.0), n(1.0)]), CellError::Num);
+    is_err(ev("BINOM.DIST.RANGE", vec![n(2_147_483_647.9), n(0.0), n(1.0)]), CellError::Num);
     close_tol(ev("BINOM.DIST.RANGE", vec![n(60.0), n(0.75), n(48.0)]), 0.083974967, 1e-6);
     close_tol(ev("BINOM.DIST.RANGE", vec![n(60.0), n(0.75), n(45.0), n(50.0)]), 0.523629793, 1e-6);
     close(ev("BINOM.INV", vec![n(6.0), n(0.5), n(0.75)]), 4.0);
@@ -466,6 +540,19 @@ fn continuous() {
     is_err(ev("GAMMA", vec![n(0.0)]), CellError::Num);
     close_tol(ev("BETA.DIST", vec![n(2.0), n(8.0), n(10.0), b(true), n(1.0), n(3.0)]), 0.6854706, D7);
     close_tol(ev("BETA.DIST", vec![n(2.0), n(8.0), n(10.0), b(false), n(1.0), n(3.0)]), 1.4837646, D7);
+    is_err(ev("BETA.DIST", vec![n(0.0), n(1.0), n(1.0), b(false)]), CellError::Num);
+    is_err(ev("BETA.DIST", vec![n(1.0), n(1.0), n(1.0), b(false)]), CellError::Num);
+    is_err(ev("BETA.DIST", vec![n(0.0), n(0.5), n(2.0), b(false)]), CellError::Num);
+    is_err(ev("BETA.DIST", vec![n(1.0), n(2.0), n(0.5), b(false)]), CellError::Num);
+    close(ev("BETA.DIST", vec![n(0.0), n(2.0), n(1.0), b(false)]), 0.0);
+    close(ev("BETA.DIST", vec![n(1.0), n(1.0), n(2.0), b(false)]), 0.0);
+    close(ev("BETA.DIST", vec![n(0.0), n(1.0), n(1.0), b(true)]), 0.0);
+    close(ev("BETA.DIST", vec![n(1.0), n(1.0), n(1.0), b(true)]), 1.0);
+    is_err(ev("BETA.DIST", vec![n(2.0), n(1.0), n(2.0), b(false), n(2.0), n(6.0)]), CellError::Num);
+    is_err(ev("BETA.DIST", vec![n(6.0), n(2.0), n(1.0), b(false), n(2.0), n(6.0)]), CellError::Num);
+    close(ev("BETA.DIST", vec![n(4.0), n(1.0), n(1.0), b(false), n(2.0), n(6.0)]), 0.25);
+    close(ev("BETA.DIST", vec![n(2.0), n(1.0), n(1.0), b(true), n(2.0), n(6.0)]), 0.0);
+    close(ev("BETA.DIST", vec![n(6.0), n(1.0), n(1.0), b(true), n(2.0), n(6.0)]), 1.0);
     close_tol(ev("BETADIST", vec![n(2.0), n(8.0), n(10.0), n(1.0), n(3.0)]), 0.6854706, D7);
     close_tol(ev("BETA.INV", vec![n(0.685470581), n(8.0), n(10.0), n(1.0), n(3.0)]), 2.0, D7);
     close_tol(ev("BETAINV", vec![n(0.685470581), n(8.0), n(10.0), n(1.0), n(3.0)]), 2.0, D7);
@@ -479,6 +566,30 @@ fn continuous() {
     close_tol(r[0][1].clone(), 0.841344746, 1e-8);
 }
 
+#[test]
+fn gamma_density_at_zero_shape_one_is_num() {
+    for scale in [0.1, 0.9, 1.0, 1.9, 2.0, 10_000_000_000.0] {
+        is_err(ev("GAMMA.DIST", vec![n(0.0), n(1.0), n(scale), b(false)]), CellError::Num);
+    }
+    is_err(ev("GAMMA.DIST", vec![n(0.0), n(0.5), n(1.0), b(false)]), CellError::Num);
+    close_tol(ev("GAMMA.DIST", vec![n(0.0), n(2.0), n(1.0), b(false)]), 0.0, 0.0);
+    close_tol(ev("GAMMA.DIST", vec![n(0.0), n(1.0), n(2.0), b(true)]), 0.0, 0.0);
+    close_tol(ev("GAMMA.DIST", vec![n(2.0), n(1.0), n(2.0), b(false)]), 0.5 * (-1.0f64).exp(), 1e-15);
+    close_tol(ev("GAMMA.DIST", vec![n(2.0), n(1.0), n(2.0), b(true)]), 1.0 - (-1.0f64).exp(), 1e-15);
+    is_err(ev("GAMMA.DIST", vec![n(-0.1), n(1.0), n(2.0), b(false)]), CellError::Num);
+}
+
+#[test]
+fn weibull_density_at_zero_is_zero() {
+    for shape in [0.5, 1.0, 2.0] {
+        close_tol(ev("WEIBULL.DIST", vec![n(0.0), n(shape), n(1.0), b(false)]), 0.0, 0.0);
+        close_tol(ev("WEIBULL.DIST", vec![n(0.0), n(shape), n(1.0), b(true)]), 0.0, 0.0);
+    }
+    close_tol(ev("WEIBULL.DIST", vec![n(1.0), n(1.0), n(1.0), b(false)]), (-1.0f64).exp(), 1e-15);
+    close_tol(ev("WEIBULL.DIST", vec![n(1.0), n(1.0), n(1.0), b(true)]), 1.0 - (-1.0f64).exp(), 1e-15);
+    is_err(ev("WEIBULL.DIST", vec![n(-0.1), n(1.0), n(1.0), b(false)]), CellError::Num);
+}
+
 #[test]
 fn aggregate_helper() {
     let vals = vec![nv(1.0), nv(2.0), tv("x"), Value::Empty, Value::Bool(true), nv(6.0)];

crates/functions/src/text.rs

@@ -111,12 +111,31 @@ fn len(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
     num_val(text(a, 0)?.chars().count() as f64)
 }
 
+fn lower_char(ch: char) -> char {
+    match ch.to_lowercase().next() {
+        Some(lower) => lower,
+        None => ch,
+    }
+}
+
+fn upper_char(ch: char) -> char {
+    let mut uppercase = ch.to_uppercase();
+    match uppercase.next() {
+        Some(upper) if uppercase.next().is_none() => upper,
+        _ => ch,
+    }
+}
+
+fn proper_upper_char(ch: char) -> char {
+    if ch == '\u{130}' { 'I' } else { upper_char(ch) }
+}
+
 fn lower(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
-    text_val(text(a, 0)?.to_lowercase())
+    text_val(text(a, 0)?.chars().map(lower_char).collect::<String>())
 }
 
 fn upper(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
-    text_val(text(a, 0)?.to_uppercase())
+    text_val(text(a, 0)?.chars().map(upper_char).collect::<String>())
 }
 
 fn proper(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
@@ -126,9 +145,9 @@ fn proper(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
     for ch in s.chars() {
         if ch.is_alphabetic() {
             if prev_letter {
-                out.extend(ch.to_lowercase());
+                out.push(lower_char(ch));
             } else {
-                out.extend(ch.to_uppercase());
+                out.push(proper_upper_char(ch));
             }
             prev_letter = true;
         } else {
@@ -281,7 +300,11 @@ fn unichar(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
     if !(1.0..=1_114_111.0).contains(&n) {
         return Err(CellError::Value);
     }
-    match char::from_u32(n as u32) {
+    let cp = n as u32;
+    if (0xFDD0..=0xFDEF).contains(&cp) || cp & 0xFFFE == 0xFFFE {
+        return Err(CellError::NA);
+    }
+    match char::from_u32(cp) {
         Some(c) => text_val(c.to_string()),
         None => Err(CellError::NA),
     }
@@ -350,10 +373,10 @@ fn numbervalue(a: &[Arg], c: &mut dyn Ctx) -> R<Value> {
 /// Formats `x` (already rounded) with `decimals` places and optional thousands separators.
 fn format_fixed(x: f64, decimals: i64, commas: bool) -> String {
     let d = decimals.max(0) as usize;
-    let s = format!("{:.*}", d, x.abs());
+    let s = x.abs().to_string();
     let (int_part, frac) = match s.split_once('.') {
-        Some((i, f)) => (i.to_string(), Some(f.to_string())),
+        Some((i, f)) => (i, f),
-        None => (s.clone(), None),
+        None => (s.as_str(), ""),
     };
     let int_part = if commas {
         let b = int_part.as_bytes();
@@ -366,12 +389,14 @@ fn format_fixed(x: f64, decimals: i64, commas: bool) -> String {
         }
         o
     } else {
-        int_part
+        int_part.to_string()
     };
     let mut out = int_part;
-    if let Some(f) = frac {
+    if d > 0 {
+        let frac_len = frac.len().min(d);
         out.push('.');
-        out.push_str(&f);
+        out.push_str(&frac[..frac_len]);
+        out.extend(std::iter::repeat_n('0', d - frac_len));
     }
     out
 }
@@ -394,13 +419,21 @@ fn fixed(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
     let (r, d) = rounded(a, 2.0)?;
     let no_commas = opt_bool(a, 2, false)?;
     let body = format_fixed(r, d, !no_commas);
+    if body.len() + if r < 0.0 { 1 } else { 0 } > 255 {
+        return Err(CellError::Value);
+    }
     text_val(if r < 0.0 { format!("-{body}") } else { body })
 }
 
 fn dollar(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
     let (r, d) = rounded(a, 2.0)?;
+    let negative = r < 0.0 || (r == 0.0 && d >= 0 && num(a, 0)? < 0.0);
     let body = format_fixed(r, d, true);
-    text_val(if r < 0.0 { format!("(${body})") } else { format!("${body}") })
+    let out = if negative { format!("(${body})") } else { format!("${body}") };
+    if out.len() > 254 {
+        return Err(CellError::Value);
+    }
+    text_val(out)
 }
 
 // ---------------------------------------------------------------------------------------------
@@ -1123,6 +1156,20 @@ mod tests {
     fn case_and_cleanup() {
         is_text(ev("UPPER", vec![t("abc")]), "ABC");
         is_text(ev("LOWER", vec![t("ABC")]), "abc");
+        is_text(ev("UPPER", vec![t("Straße")]), "STRAßE");
+        is_text(ev("LOWER", vec![t("İ")]), "i");
+        is_text(ev("PROPER", vec![t("İSTANBUL")]), "Istanbul");
+        is_text(ev("PROPER", vec![t("ß")]), "ß");
+        is_text(ev("PROPER", vec![t("ÉCOLE")]), "École");
+        let proper = ev("PROPER", vec![t("İSTANBUL Straße")]);
+        is_text(proper.clone(), "Istanbul Straße");
+        assert_eq!(
+            match proper {
+                Value::Text(s) => s.chars().count(),
+                _ => 0,
+            },
+            "Istanbul Straße".chars().count()
+        );
         is_text(ev("PROPER", vec![t("this is a TITLE")]), "This Is A Title");
         is_text(ev("PROPER", vec![t("2-way street's")]), "2-Way Street'S");
         is_text(ev("TRIM", vec![t("  a   b  c ")]), "a b c");
@@ -1181,8 +1228,15 @@ mod tests {
         close(ev("CODE", vec![t("€")]), 128.0);
         is_err(ev("CODE", vec![t("")]), CellError::Value);
         is_text(ev("UNICHAR", vec![n(9731.0)]), "☃");
+        for cp in [0xFDD0, 0xFDEF, 0xFFFE, 0xFFFF, 0x1FFFE, 0x1FFFF, 0x10FFFE, 0x10FFFF] {
+            is_err(ev("UNICHAR", vec![n(f64::from(cp))]), CellError::NA);
+        }
+        for (cp, expected) in [(0xFDCF, "\u{FDCF}"), (0xFDF0, "\u{FDF0}"), (0xFFFD, "\u{FFFD}"), (0x1FFFD, "\u{1FFFD}")] {
+            is_text(ev("UNICHAR", vec![n(f64::from(cp))]), expected);
+        }
         close(ev("UNICODE", vec![t("☃")]), 9731.0);
         is_err(ev("UNICHAR", vec![n(0.0)]), CellError::Value);
+        is_err(ev("UNICHAR", vec![n(1_114_112.0)]), CellError::Value);
         is_err(ev("UNICHAR", vec![n(55296.0)]), CellError::NA);
     }
 
@@ -1237,10 +1291,57 @@ mod tests {
         is_text(ev("DOLLAR", vec![n(0.5), n(0.0)]), "$1");
         is_text(ev("USDOLLAR", vec![n(1.0)]), "$1.00");
         is_text(ev("USDOLLAR", vec![n(-1234.567), n(1.0)]), "($1,234.6)");
+        let fixed_16 = format!("1.1{}", "0".repeat(15));
+        let dollar_16 = format!("$1.1{}", "0".repeat(15));
+        let fixed_20 = format!("1.005{}", "0".repeat(17));
+        let dollar_20 = format!("$1.005{}", "0".repeat(17));
+        let fixed_127 = format!("1.1{}", "0".repeat(126));
+        let dollar_127 = format!("$1.1{}", "0".repeat(126));
+        is_text(ev("FIXED", vec![n(1.1), n(16.0)]), &fixed_16);
+        is_text(ev("DOLLAR", vec![n(1.1), n(16.0)]), &dollar_16);
+        is_text(ev("FIXED", vec![n(1.005), n(20.0)]), &fixed_20);
+        is_text(ev("DOLLAR", vec![n(1.005), n(20.0)]), &dollar_20);
+        is_text(ev("FIXED", vec![n(1.1), n(127.0)]), &fixed_127);
+        is_text(ev("DOLLAR", vec![n(1.1), n(127.0)]), &dollar_127);
         is_text(ev("T", vec![t("x")]), "x");
         is_text(ev("T", vec![n(1.0)]), "");
     }
 
+    #[test]
+    fn fixed_and_dollar_output_limits() {
+        assert!(matches!(ev("FIXED", vec![n(1e191), n(0.0)]), Value::Text(ref s) if s.len() == 255));
+        is_err(ev("FIXED", vec![n(1e192), n(0.0)]), CellError::Value);
+        assert!(matches!(ev("FIXED", vec![n(-1e253), n(0.0), b(true)]), Value::Text(ref s) if s.starts_with('-')));
+        is_err(ev("FIXED", vec![n(-1e191), n(0.0)]), CellError::Value);
+        assert!(matches!(ev("FIXED", vec![n(1e189), n(1.0)]), Value::Text(ref s) if s.len() == 255));
+        is_err(ev("FIXED", vec![n(1e190), n(1.0)]), CellError::Value);
+
+        assert!(matches!(ev("DOLLAR", vec![n(1e189), n(0.0)]), Value::Text(ref s) if s.len() == 254));
+        is_err(ev("DOLLAR", vec![n(1e190), n(0.0)]), CellError::Value);
+        assert!(matches!(ev("DOLLAR", vec![n(-1e188), n(0.0)]), Value::Text(ref s) if s.len() == 254));
+        is_err(ev("DOLLAR", vec![n(-1e189), n(0.0)]), CellError::Value);
+        assert!(matches!(ev("DOLLAR", vec![n(1.23456789e187), n(2.0)]), Value::Text(ref s) if s.len() == 254));
+        is_err(ev("DOLLAR", vec![n(1.23456789e188), n(2.0)]), CellError::Value);
+        is_err(ev("DOLLAR", vec![n(-1.23456789e186), n(2.0)]), CellError::Value);
+        assert!(matches!(ev("DOLLAR", vec![n(1e189), n(-1.0)]), Value::Text(ref s) if s.len() == 254));
+        is_err(ev("DOLLAR", vec![n(1e190), n(-1.0)]), CellError::Value);
+    }
+
+    #[test]
+    fn dollar_keeps_negative_sign_when_nonnegative_precision_rounds_to_zero() {
+        is_text(ev("DOLLAR", vec![n(-0.0001), n(0.0)]), "($0)");
+        is_text(ev("DOLLAR", vec![n(-0.0001), n(2.0)]), "($0.00)");
+        is_text(ev("DOLLAR", vec![n(0.0), n(0.0)]), "$0");
+        is_text(ev("DOLLAR", vec![n(-0.0), n(0.0)]), "$0");
+        is_text(ev("DOLLAR", vec![n(0.0001), n(0.0)]), "$0");
+        is_text(ev("DOLLAR", vec![n(-0.0001), n(-1.0)]), "$0");
+        is_text(ev("DOLLAR", vec![n(-4.0), n(-1.0)]), "$0");
+        is_text(ev("DOLLAR", vec![n(-5.0), n(-1.0)]), "($10)");
+        is_text(ev("DOLLAR", vec![n(-0.4), n(0.0)]), "($0)");
+        is_text(ev("DOLLAR", vec![n(-0.5), n(0.0)]), "($1)");
+        is_text(ev("FIXED", vec![n(-0.0001), n(0.0)]), "0");
+    }
+
     #[test]
     fn before_after() {
         is_text(ev("TEXTBEFORE", vec![t("Red riding hood"), t(" ")]), "Red");

crates/ui-egui/Cargo.toml

@@ -11,7 +11,7 @@ workspace = true
 [dependencies]
 # The shared capture slot (`craft_ui::capture`) comes from the one craft-libs revision every
 # craft-libs dependency uses (see the root Cargo.toml).
-craft-ui = { git = "https://github.com/storytold/craft-libs", rev = "92d392cff132eaf53e13afff77f38b5c11b73aa0" }
+craft-ui = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7" }
 gridcraft-engine = { workspace = true }
 gridcraft-chart = { workspace = true }
 # `monochrome_emoji_fonts` restores the Noto Emoji and emoji-icon faces that 0.37 moved behind

crates/ui-egui/build.rs

@@ -1,8 +1,7 @@
-//! Bake the contributor credits into the binary as static Rust tables (craftrules
+//! Bake the contributor credits into the binary as static Rust tables. Nothing is read at run time.
-//! standards/contributors.md). Nothing is read at run time.
 //!
-//! - contributors/contributors.json: commit stats per GitHub username, generated by craftrules
+//! - contributors/contributors.json: commit stats per GitHub username, with a mark for whose
-//!   scripts/contributors.py, which also marks whose people.toml entry it verified.
+//!   people.toml entry is verified.
 //! - contributors/people.toml: the names people chose for themselves. A name is used only when the
 //!   JSON says the entry was verified (`people_entry`).
 //!

crates/ui-egui/src/credits.rs

@@ -1,7 +1,6 @@
 //! The About window's credits: every contributor (GitHub login always; display and real names only
 //! with recorded consent) and the AI models that helped. The tables are baked into the binary by
-//! build.rs from contributors/contributors.json (craftrules standards/contributors.md); nothing is
+//! build.rs from contributors/contributors.json; nothing is read at run time.
-//! read at run time.
 
 use std::cmp::Ordering;
 

crates/ui-egui/src/ribbon/home.rs

@@ -5,7 +5,7 @@ use super::controls::{
 use super::galleries::{cell_style_gallery, table_gallery};
 use super::{
     HAlign, Icon, Key, Modifiers, Rect, SheetApp, Style, Tokens, Ui, VAlign, big_button, color_palette, icon_button, json, keytip_table,
-    small_button, split_button, theme, toggle_button, vec2,
+    small_button, small_split_button, split_button, theme, toggle_button, vec2,
 };
 
 /// The Accounting Number Format dropdown: label and the code Excel applies for that symbol.
@@ -292,12 +292,11 @@ pub(super) fn home(app: &mut SheetApp, ui: &mut Ui) {
             if __k.clicked() {
                 act(app, "home.increaseIndent", json!({}));
             }
-            let (m, ma) = split_button(ui, Icon::Merge, None, "Merge & Center");
+            let (m, ma) = small_split_button(ui, Icon::Merge, "Merge & Center", "Merge & Center");
             control_keytip(app, ui, &ma, "home.mergeCenter");
-            if m {
+            if m.clicked() {
                 act(app, "home.mergeCenter", json!({}));
             }
-            ui.label(egui::RichText::new(app.ui.language.tr("Merge & Center")).font(theme::ui_font(12.5)));
             egui::Popup::menu(&ma).show(|ui| {
                 menu_items(
                     app,

crates/ui-egui/src/updates_ui.rs

@@ -2,6 +2,7 @@
 //! offers the new release: Update and Restart (direct self-update), Download or Later. The flow
 //! itself is `craft_update::updater::Updater`.
 
+use craft_update::CheckResultResponse;
 use craft_update::updater::{Action, Status, Updater};
 
 use crate::SheetApp;
@@ -14,11 +15,13 @@ pub(crate) struct Runtime {
     startup: bool,
     /// Help ▸ Check for Updates… was chosen; the next `tick` starts it.
     manual: bool,
+    /// The result dialog of a requested check is showing.
+    result_open: bool,
 }
 
 impl Default for Runtime {
     fn default() -> Self {
-        Self { updater: Updater::new(&crate::UPDATE_APP, VERSION), startup: false, manual: false }
+        Self { updater: Updater::new(&crate::UPDATE_APP, VERSION), startup: false, manual: false, result_open: false }
     }
 }
 
@@ -35,19 +38,14 @@ pub(crate) fn tick(app: &mut SheetApp, ctx: &egui::Context) {
     let rt = &mut app.updates_rt;
     if std::mem::take(&mut rt.manual) {
         rt.updater.check_now(ctx);
+        rt.result_open = true;
     } else if rt.startup {
         rt.updater.check_at_start(ctx);
     }
     rt.updater.tick(ctx);
-    let lang = app.ui.language;
+    // A requested check that found a release leaves the status idle and the prompt opens.
-    let outcome = match rt.updater.status() {
+    if matches!(rt.updater.status(), Status::Idle) {
-        Status::UpToDate => Some(lang.tr("GridCraft {version} is up to date.").replace("{version}", VERSION)),
+        rt.result_open = false;
-        Status::Failed(e) => Some(lang.tr("Could not check for updates: {error}").replace("{error}", e)),
-        Status::Idle | Status::Checking => None,
-    };
-    if let Some(message) = outcome {
-        rt.updater.dismiss_status();
-        app.message = Some(("GridCraft".into(), message));
     }
 }
 
@@ -65,4 +63,15 @@ pub(crate) fn show(app: &mut SheetApp, ctx: &egui::Context) {
         Action::Close => ctx.send_viewport_cmd(egui::ViewportCommand::Close),
         Action::None => {}
     }
+    if app.updates_rt.result_open {
+        let rt = &mut app.updates_rt;
+        match craft_update::CheckResultDialog::new(&crate::UPDATE_APP, VERSION).show(ctx, rt.updater.status()) {
+            CheckResultResponse::Close => {
+                rt.updater.dismiss_status();
+                rt.result_open = false;
+            }
+            CheckResultResponse::CheckAgain => rt.updater.check_now(ctx),
+            CheckResultResponse::None => {}
+        }
+    }
 }

crates/ui-egui/tests/it/main.rs

@@ -63,6 +63,7 @@ mod keytips_generated;
 mod macro_editor;
 mod macros_ui;
 mod menu_hover;
+mod merge_center_label;
 mod merged_cells;
 mod more_colors;
 mod native_print;

crates/ui-egui/tests/it/merge_center_label.rs

@@ -0,0 +1,51 @@
+//! Home › Merge & Center is a split button: clicking its text label runs `home.mergeCenter`, like
+//! its icon does.
+
+use egui::{Event, Shape, vec2};
+use gridcraft_engine::Session;
+use gridcraft_ui_egui::SheetApp;
+use gridcraft_ui_egui::i18n::Language;
+use serde_json::json;
+
+#[test]
+fn clicking_the_label_merges_and_centers() {
+    for language in [Language::En, Language::De] {
+        click_label(language);
+    }
+}
+
+fn click_label(language: Language) {
+    let label = language.tr("Merge & Center");
+    let mut s = Session::new();
+    s.new_workbook();
+    s.execute("selection.set", json!({"range": "A1:B1"})).unwrap();
+    let mut h = crate::common::builder().with_size(vec2(1400.0, 800.0)).build_ui_state(
+        |ui, app: &mut SheetApp| {
+            app.logic(ui.ctx());
+            app.ui(ui);
+        },
+        {
+            let mut app = crate::common::app(s);
+            app.ui.language = language;
+            app
+        },
+    );
+    h.run_steps(4);
+    let at = h
+        .output()
+        .shapes
+        .iter()
+        .find_map(|s| match &s.shape {
+            Shape::Text(t) if t.galley.job.text == label => Some(t.pos + t.galley.size() / 2.0),
+            _ => None,
+        })
+        .unwrap_or_else(|| panic!("the Home tab shows {label}"));
+    h.input_mut().events.push(Event::PointerMoved(at));
+    h.run_steps(2);
+    for pressed in [true, false] {
+        h.input_mut().events.push(Event::PointerButton { pos: at, button: egui::PointerButton::Primary, pressed, modifiers: egui::Modifiers::NONE });
+        h.run_steps(2);
+    }
+    h.run_steps(2);
+    assert!(h.state().session.journal.iter().any(|(id, _)| id == "home.mergeCenter"), "{label}");
+}

crates/xlsx/src/tables.rs

@@ -151,6 +151,7 @@ const FUTURE_FUNCTIONS: &[&str] = &[
     "CSCH",
     "DAYS",
     "DECIMAL",
+    "DETECTLANGUAGE",
     "DROP",
     "ENCODEURL",
     "ERF.PRECISE",
@@ -243,6 +244,7 @@ const FUTURE_FUNCTIONS: &[&str] = &[
     "SORTBY",
     "STDEV.P",
     "STDEV.S",
+    "STOCKHISTORY",
     "SWITCH",
     "T.DIST",
     "T.DIST.2T",
@@ -257,6 +259,7 @@ const FUTURE_FUNCTIONS: &[&str] = &[
     "TEXTSPLIT",
     "TOCOL",
     "TOROW",
+    "TRANSLATE",
     "TRIMRANGE",
     "UNICHAR",
     "UNICODE",
@@ -352,6 +355,13 @@ mod tests {
         assert_eq!(file_function_name("FILTER").as_deref(), Some("_xlfn._xlws.FILTER"));
         assert_eq!(file_function_name("PERCENTOF").as_deref(), Some("_xlfn.PERCENTOF"));
         assert_eq!(file_function_name("TRIMRANGE").as_deref(), Some("_xlfn.TRIMRANGE"));
+        assert_eq!(file_function_name("stockhistory").as_deref(), Some("_xlfn.STOCKHISTORY"));
+        assert_eq!(file_function_name("TRANSLATE").as_deref(), Some("_xlfn.TRANSLATE"));
+        assert_eq!(file_function_name("DETECTLANGUAGE").as_deref(), Some("_xlfn.DETECTLANGUAGE"));
+        assert_eq!(file_function_name("NETWORKDAYS.INTL").as_deref(), Some("_xlfn.NETWORKDAYS.INTL"));
+        assert_eq!(file_function_name("WORKDAY.INTL").as_deref(), Some("_xlfn.WORKDAY.INTL"));
+        // Excel 16.0 build 20527 saves COPILOT as plain `COPILOT(...)` (it does not know the name yet).
+        assert_eq!(file_function_name("COPILOT"), None);
         assert_eq!(file_function_name("SUM"), None);
         assert_eq!(builtin_format(14), Some("m/d/yyyy"));
         assert_eq!(builtin_id("0.00%"), Some(10));

docs/contributors.md

@@ -1,16 +1,14 @@
 # Contributors in the About window
 
 **About ▸ Contributors** credits everyone who contributed to GridCraft, and **About ▸ Models** credits
-the AI models named in `Co-Authored-By` trailers. This follows the shared craftrules standard
+the AI models named in `Co-Authored-By` trailers.
-[`standards/contributors.md`](https://github.com/storytold/craftrules/blob/main/standards/contributors.md);
-this page is the local copy of the decision.
 
 ## Decision
 
 - Two files, both **compiled into the binary** by the UI crate's `build.rs` (nothing is read from
   disk or the network at run time; the web build has them too):
   - [`contributors/contributors.json`](../contributors/contributors.json): commit stats per GitHub
-    username. **Generated** by `craftrules/scripts/contributors.py`; never hand-edit.
+    username. Never hand-edit.
   - [`contributors/people.toml`](../contributors/people.toml): the names people chose for
     themselves. **Each contributor adds only their own entry**, in their own PR.
 - Each contributor gets one line: GitHub username (always), display name (opt-in, or their synced
@@ -37,20 +35,5 @@ display_name = "Nickname"
 sync_github_name = true   # use the name on your public GitHub profile as display name
 ```
 
-or, with craftrules checked out next to `craft-apps/`:
+Names show for entries committed by their own user (or by a maintainer with a `consent_source`).
-
+Delete your entry to remove your names. Git author names and emails are never recorded.
-```sh
-python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "Your Name" --sync-github-name
-```
-
-Names show after the next refresh: the script checks that each entry was committed by its own
-user (or by a maintainer with a `consent_source`). Delete your entry to remove your names.
-
-## Refreshing (maintainers)
-
-```sh
-python3 ../../craftrules/scripts/contributors.py .           # regenerate + verify; needs git, Python 3.11+, gh
-python3 ../../craftrules/scripts/contributors.py --check .   # verify people.toml only
-```
-
-Commit the updated `contributors/contributors.json`. Git author names and emails are never recorded.

docs/file-format-parity.md

@@ -97,7 +97,7 @@ refresh. Counted under features (Get & Transform, ~10% ready), not here.
 
 | Work | Hours |
 |---|---|
-| Real-world XLSX corpus run (craftrules test-corpora standard), and confirm Excel opens our output with no repair prompt (owner runs Excel) | 15–25 |
+| Real-world XLSX corpus run, and confirm Excel opens our output with no repair prompt (owner runs Excel) | 15–25 |
 | Preserve the rest of the unmodelled XLSX content (slicers, timelines, data model, table query tables, `extLst` entries); pass-through landed for the rest (#330) | 6–10 |
 | Streaming XLSX reader for very large files (#175), part-size limits that degrade instead of failing | 10–15 |
 | Legacy `.xls` (BIFF8): styles (fonts, fills, borders, alignment), comments, CF, validation, pictures and charts on import; corpus run; then write | 10–15 |

docs/function-parity.md

@@ -1,6 +1,6 @@
 # Function parity: worksheet functions and formulas
 
-> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-27 · **Change:** minor (ECMA.CEILING listed with USDOLLAR as not on Microsoft's list; earlier: IMSQRT reproduces the stray real part Excel gives for negative reals, and the other IM* differences from Excel are listed; earlier: the LAMBDA row lists the recursion limit and its `#NUM!`, and the error a defined name holding an error gives when called; earlier: number text with accounting parentheses coerces like Excel 365; INDEX with one index on a 2-D reference is #REF! as in Excel; earlier: SUBTOTAL and AGGREGATE cap the cells they visit, #2175) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-31 · **Last updated:** 2026-10-31 · **Change:** minor (YEARFRAC basis 0 February-end rule, MOD quotient limit, PERCENTRANK significance; earlier: edge cases matched to Excel: base conversions, BITLSHIFT/BITRSHIFT, UNICHAR noncharacters, UPPER/LOWER/PROPER casing, FIXED/DOLLAR output, F/T/GAMMA/WEIBULL/BETA distributions, BINOM trial cap, HARMEAN; earlier: ECMA.CEILING listed with USDOLLAR as not on Microsoft's list; earlier: IMSQRT reproduces the stray real part Excel gives for negative reals) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
 
 Excel's worksheet functions, category by category, against GridCraft's function library. Part of
 [target-app-parity.md](target-app-parity.md); gaps feed [gaps.md](gaps.md).
@@ -86,11 +86,14 @@ This improves series preparation; it does not change the model-fitting or season
 | Implicit intersection `@`, legacy CSE array formulas | done; legacy array range fill (PR #156) |
 | Implicit intersection `@`, legacy CSE array formulas | done, the entered range filled (PR #156) |
 | Array lifting: an array in a scalar argument evaluates the function per element | done. The Analysis ToolPak functions (EOMONTH, EDATE, WORKDAY(.INTL), NETWORKDAYS(.INTL), YEARFRAC, WEEKNUM, the COUP*, PRICE*, YIELD*, ODD*, TBILL*, ACCRINT*, AMOR*, DISC, DURATION, CUMIPMT/CUMPRINC, EFFECT, NOMINAL, DOLLARDE/FR, XNPV/XIRR rate and guess, FVSCHEDULE principal, ISEVEN/ISODD, QUOTIENT, MROUND, FACTDOUBLE, SQRTPI, RANDBETWEEN, SERIESSUM, the base conversions, CONVERT, DELTA, GESTEP, ERF/ERFC, BESSEL*, COMPLEX and IM* except IMSUM/IMPRODUCT) give `#VALUE!` for a reference to more than one cell in a value argument, as Excel 365 does in both dynamic-array and legacy formulas; array constants and computed arrays (`A1:A3+0`) still lift, and range arguments (holidays, schedule, cash flows) and the .INTL weekend accept ranges. Difference: BYROW/BYCOL pass their row or column to the LAMBDA as values, so `BYROW(A1:B3,LAMBDA(r,EOMONTH(r,0)))` lifts where Excel gives `#VALUE!` |
+| YEARFRAC basis 0, February-end start to day 31 | done: Excel 16.0 returns 31/360 for `YEARFRAC(2021-02-28,2021-03-31,0)` (0.08611111111111111); regression also covers leap day and reversed dates |
 | Trim references `A1:.E10` (trailing), `A1.:E10` (leading), `A1.:.E10` (both), also on whole rows/columns (`A:.A`) | done; evaluated as `TRIMRANGE(range, code, code)`, adjusted on insert/delete; files store `_xlfn.TRIMRANGE(range,code,code)` (Excel's own file spelling unconfirmed in public docs), `_xlfn._TRO_ALL/_TRO_LEADING/_TRO_TRAILING(...)` read too |
 | LET, LAMBDA, named LAMBDAs, ISOMITTED, MAP/REDUCE/SCAN/BYROW/BYCOL/MAKEARRAY | done. A LAMBDA that calls itself more than 140 times, or a formula nested past the depth limit, gives `#NUM!` (the target app allows deeper recursion, #1581). Calling a defined name that holds an error value gives that error, not `#NAME?` |
 | Iterative calculation for circular references | done: with Enable Iterative Calculation on (`formulas.calculationOptions` `{iterative, maxIterations, maxChange}`, saved as `<calcPr iterate iterateCount iterateDelta>`), loops are evaluated again from their previous values (blank = 0) until no cell on a loop changes by Maximum Change or Maximum Iterations is reached; off, cycles give `#CIRC!`. Set in File › Options › Formulas (Enable iterative calculation, Maximum Iterations 1 to 32767, Maximum Change 0 or more; the two fields are disabled while iteration is off). Differences: GridCraft recalculates on open, so a loop that never settles (`=A1+1`) advances again each time the file is opened
 | 15-significant-digit comparison semantics | done (#57): `=0.1+0.2=0.3` is TRUE, and MATCH and COUNTIF compare the same way. Arithmetic keeps full precision, as Excel does — `=(0.1+0.2)-0.3` is 5.55E-17 |
 | IMSQRT and the other IM* functions against Excel's text | IMSQRT follows Excel's polar route, so a negative real gives Excel's stray real part: `IMSQRT("-4")` is `1.22514845490862E-16+2i` (checked in Excel 16.0 on 79 inputs). Differences kept: IMSQRT of a number with a part above about 1E154 or below about 1E-155 gives the exact root (Excel gives `#NUM!` or 0); IMPOWER, IMEXP, IMSIN, IMCOS, IMSINH and IMCOSH keep exact results where Excel shows the same kind of noise (`IMPOWER("-4",2)` is `16-3.92047505570758E-15i`) or different trailing digits near multiples of pi/2; IMCSC and IMCSCH differ by one unit in the 15th digit; IMARGUMENT returns 16–17 digits where Excel returns 15; the text of IM* and COMPLEX results differs for some magnitudes (Excel writes `COMPLEX(1E-10,1)` as `0.0000000001+i` but `COMPLEX(0.000000123456789012345,1)` as `1.23456789012345E-07+i`, and an integer past 15 digits rounded and zero-padded) |
+| MOD quotient limit | done: Excel 16.0 returns `#NUM!` when `ABS(number/divisor) >= 1.1259E12`; lower quotients retain the remainder |
+| PERCENTRANK significance and precision | done: Excel 16.0 returns `#DIV/0!` from significance 309, and rounds to 15 significant digits for significance 15–308 |
 | External workbook references (`[Book.xlsx]Sheet1!A1`) | parsed; links dropped on open, no update |
 | Localized function names and `;` separators | **missing** (#45); en-US only |
 | Long flat operator chains (`=A1+A2+…`, `-`, `*`, `/`, `^`, `&`, comparisons) | done: no operand limit below Excel's 8,192-character formula limit (Excel, observed: `=1+1+…` with 4,096 operands is exactly 8,192 characters with the `=` and calculates; one more character is refused). Evaluated (#484), printed (#628), stored, copied, adjusted, saved and reopened without recursing once per operand, on a 1 MiB stack (#916); written to XLSX as plain formulas, not dynamic arrays; Spanish entry accepts them |
@@ -98,6 +101,12 @@ This improves series preparation; it does not change the model-fitting or season
 
 ## Depth (estimated)
 
+| Function | Excel parity note |
+|---|---|
+| BINOM.DIST / BINOM.DIST.RANGE | Trial count is truncated, then must be at most 2,147,483,646; larger trials return `#NUM!`. |
+| BETA.DIST | Density mode returns `#NUM!` at the lower or upper interval endpoint when the corresponding shape parameter is less than or equal to 1; cumulative endpoint results remain 0 and 1. |
+| HARMEAN | Returns `#N/A` when arrays and references contain no numeric observations; zero and negative numeric observations still return `#NUM!`. |
+
 **~82% ready.** The library is broad and has 96 test functions in `crates/functions` with many
 assertions each, but there is no conformance suite against Excel-computed results, and user
 reports keep finding edge cases: MIN() with no arguments (#138), COUNTBLANK past the used range
@@ -124,6 +133,24 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-31 | minor | BIN2*, HEX2* and OCT2* reject surrounding spaces and tabs in source strings with `#NUM!`, matching Excel; plain unpadded values remain valid |
+| 2026-10-31 | minor | DEC2BIN, DEC2HEX and DEC2OCT validate `places` before returning negative two's-complement output, and Boolean places return `#VALUE!`, matching Excel |
+| 2026-10-31 | minor | BITLSHIFT and BITRSHIFT return `0` for zero operands shifted beyond 53 bits in either direction; nonzero operands retain the `#NUM!` limit, matching Excel |
+| 2026-10-31 | minor | UNICHAR returns `#N/A` for U+FDD0–U+FDEF and U+FFFE/U+FFFF on every plane; adjacent valid characters and existing invalid-range/surrogate errors remain unchanged, matching Excel |
+| 2026-10-31 | minor | UPPER, LOWER and PROPER use single-character casing: `UPPER("Straße")` keeps ß, `LOWER("İ")` returns i, and `PROPER("İSTANBUL")` returns Istanbul, matching Windows Excel 16.0 build 20527 in LCID 1033 |
+| 2026-10-31 | minor | FIXED and DOLLAR format the rounded number's shortest decimal representation before padding requested fractional zeroes, so 1.1 at 16 places and 1.005 at 20 places do not expose binary noise; measured in Windows Excel 16.0 build 20527, LCID 1033 |
+| 2026-10-31 | minor | FIXED accepts output through 255 characters; DOLLAR accepts output through 254. Windows Excel 16.0 build 20527 (LCID 1033) confirmed the distinct cutoffs with grouped and ungrouped values, signs, currency layout and decimal places |
+| 2026-10-31 | minor | DOLLAR uses the input sign for negative amounts that round to zero at nonnegative decimal places (`DOLLAR(-0.0001,0)` is `($0)`); when negative decimal places round to zero, Excel returns `$0`. Exact zero and negative zero stay unsigned; FIXED still returns `0` for `FIXED(-0.0001,0)` |
+| 2026-10-31 | minor | F.DIST, F.DIST.RT, F.INV and F.INV.RT accept degrees of freedom at the 10-billion boundary; F.INV uses the complementary tail, with a gamma-tail limit when numerator degrees dominate, to preserve inverse accuracy; values above the limit remain invalid |
+| 2026-10-31 | minor | T.DIST returns `#DIV/0!` in density mode and `#NUM!` in cumulative mode when degrees truncate to zero; negative integer degrees remain `#NUM!` |
+| 2026-10-31 | minor | Student-t density uses an asymptotic log-gamma ratio for large degrees of freedom, avoiding cancellation while preserving bounded work; checked against Excel at 100 million and 10 billion degrees |
+| 2026-10-31 | minor | T.INV probability zero returns `#DIV/0!`, while other out-of-range probabilities and invalid degrees remain `#NUM!`; T.INV.2T keeps its separate boundary behavior |
+| 2026-10-31 | minor | GAMMA.DIST density at x=0 and shape 1 returns `#NUM!` for all positive scales; the cumulative branch and other shape boundaries are unchanged |
+| 2026-10-31 | minor | WEIBULL.DIST returns zero at x=0 in both density and cumulative modes, including shape below one; negative x remains `#NUM!` |
+| 2026-10-31 | minor | BINOM.DIST and BINOM.DIST.RANGE reject trial counts above 2,147,483,646 after truncation |
+| 2026-10-31 | minor | BETA.DIST density returns `#NUM!` at the lower endpoint with alpha less than or equal to 1 and upper endpoint with beta less than or equal to 1; cumulative behavior is unchanged |
+| 2026-10-31 | minor | HARMEAN returns `#N/A` when array or reference inputs contain no numbers; nonpositive numeric observations remain `#NUM!` |
+| 2026-10-31 | minor | YEARFRAC basis 0 tests the end-31 rule against the original start day; MOD returns `#NUM!` from a quotient of 1.1259E12; PERCENTRANK returns `#DIV/0!` from significance 309 and 15 significant digits from 15 (Excel 16) |
 | 2026-10-27 | minor | ECMA.CEILING added to the functions that are in our library but not on Microsoft's list (with USDOLLAR), so the counts don't change |
 | 2026-10-26 | minor | IMSQRT uses Excel's polar route with its cosine reduction, so `IMSQRT("-4")` is `1.22514845490862E-16+2i` as in Excel (exact `2i` before); the rows list the IM* differences still open |
 | 2026-10-25 | minor | LAMBDA row: a LAMBDA that calls itself more than 140 times, and a formula nested past the depth limit, give `#NUM!` (#1809; nesting gave `#CALC!` before). `=Foo(1)` where the defined name Foo holds `#N/A` gives `#N/A`, not `#NAME?` |

docs/release-playbook.md

@@ -1,9 +0,0 @@
-# Release playbook
-
-The release playbook shared by every crafting app lives in craftrules:
-[`../craftrules/release/playbook.md`](../../../craftrules/release/playbook.md)
-(`storytold/craftrules`, `release/playbook.md`). It is the canonical copy; don't duplicate it
-here. The signing runbook is next to it in `release/signing-setup.md`.
-
-GridCraft's copy was taken from DesignCraft (`.github/workflows/release.yml`, `packaging/`,
-`cargo xtask version`). GridCraft-specific details are in [releasing.md](releasing.md).

docs/releasing.md

@@ -5,8 +5,7 @@ signed installers for macOS, Windows, Linux, FreeBSD and the web, then creates o
 **draft** GitHub Release named `GridCraft v<version>`. Nobody sees a draft until a maintainer
 publishes it.
 
-This is GridCraft's implementation of the shared [release playbook](release-playbook.md)
+This process was copied from DesignCraft and renamed. User-facing names say
-(craftrules `release/playbook.md`), copied from DesignCraft and renamed. User-facing names say
 **GridCraft**. Files, binaries and ids stay lowercase
 (`gridcraft-<version>-<platform>-<arch>.<ext>`, `ai.storyteller.gridcraft`).
 
@@ -19,25 +18,24 @@ This is GridCraft's implementation of the shared [release playbook](release-play
 | Web app dir `apps/gridcraft-web` | `packaging/web/package.sh` |
 | App colour `#1f9d55` (ink `#147a40`), **proposed** | `assets/app-icon/README.md`, metainfo `<branding>` |
 
-## Prerequisites still owned by the app crates
+## Application release prerequisites
 
-The pipeline references crates that don't exist yet; the first release run fails until they do:
+The `apps/gridcraft` and `apps/gridcraft-web` crates are workspace members, and
+`apps/gridcraft-cli` supports `--version`. The `cargo xtask` alias is defined in
+`.cargo/config.toml`. The current app-specific release setup includes:
 
-- **`apps/gridcraft`** (the GUI binary `gridcraft`) and **`apps/gridcraft-web`** (trunk
+- **Windows resources:** `apps/gridcraft/build.rs` embeds the icon and version information with
-  site) must be workspace members. `apps/gridcraft-cli` exists and supports `--version`.
+  `winresource` (instructions at the top of the file). `package.ps1` sets
-- **Windows resources:** move `packaging/windows/app-build.rs.in` to `apps/gridcraft/build.rs`
+  `GRIDCRAFT_REQUIRE_WINRES=1`, so a release build without the icon fails, and it checks that
-  and add `winresource = "0.1"` under `[build-dependencies]` (instructions at the top of the
+  `gridcraft.exe` is a GUI-subsystem binary. `apps/gridcraft/src/main.rs` sets
-  file). `package.ps1` sets `GRIDCRAFT_REQUIRE_WINRES=1`, so a release build without the icon
+  `windows_subsystem = "windows"` for release builds.
-  fails, and it checks that `gridcraft.exe` is a GUI-subsystem binary, so `main.rs` needs
+- **Version information:** `gridcraft --version`, `gridcraft-cli --version` and the About dialog
-  `#![cfg_attr(all(target_os = "windows", not(debug_assertions)), windows_subsystem = "windows")]`.
+  use `env!("CARGO_PKG_VERSION")` from `[workspace.package]`. `packaging/env.sh` also exports
-- **Build info:** CI exports `GRIDCRAFT_BUILD_SHA` and `GRIDCRAFT_BUILD_DATE`; read them
+  `GRIDCRAFT_BUILD_SHA` and `GRIDCRAFT_BUILD_DATE` for artifact metadata.
-  with `option_env!` (fallback: "dev build") for `--version` and *Help › About GridCraft*.
+- **Runtime icon:** `apps/gridcraft/src/main.rs` embeds
-- **Runtime icon:** embed `assets/app-icon/gridcraft-macos-512.png` (macOS Dock) and
+  `assets/app-icon/gridcraft-macos-512.png` (macOS Dock) and
   `hicolor/256x256/apps/ai.storyteller.gridcraft.png` (Windows/Linux) as the window icon, and
-  use `ai.storyteller.gridcraft` as the Wayland app id / `StartupWMClass`.
+  uses `ai.storyteller.gridcraft` as the Wayland app id / `StartupWMClass`.
-- **`cargo xtask` alias:** the docs use `cargo xtask …`, which needs
-  `.cargo/config.toml` with `[alias] xtask = "run --package xtask --"`. Until it exists, use
-  `cargo run -p xtask -- …`. The workflows already call `cargo run -p xtask` directly.
 
 ## Cutting a release
 
@@ -224,7 +222,7 @@ shows a `::warning::`. Never store these as org- or repo-level Actions secrets (
 
 `GITHUB_TOKEN` creates the release; only the final job gets `contents: write`.
 
-The exact commands (from craftrules `release/signing-setup.md`, steps 1–3), run by an org
+The repository setup commands, run by an org
 admin. Done for storytold/gridcraft on 2026-10-07; the `release-managers` team also has write
 access to the repo, which its ruleset bypass needs.
 
@@ -274,8 +272,7 @@ the publisher.
 ## Icons
 
 `assets/app-icon/gridcraft.svg` is a **placeholder** (an original ledger-page drawing on
-GridCraft green) until the owner makes GridCraft's engraved creature portrait (craftrules
+GridCraft green) until the owner makes GridCraft's engraved creature portrait. `packaging/icons.sh` regenerates the 1024 px PNG, the macOS 512 px
-`standards/icon-design.md`). `packaging/icons.sh` regenerates the 1024 px PNG, the macOS 512 px
 PNG, the `.icns` (iconutil), the `.ico` (`cargo xtask ico`) and the hicolor PNGs from it; it
 needs `resvg`. The outputs are committed, so packaging never needs those tools. Every file has a
 row in `ATTRIBUTION.md` (`cargo xtask assets`).
@@ -289,7 +286,8 @@ row in `ATTRIBUTION.md` (`cargo xtask assets`).
   installs, runs and uninstalls the MSI on a Windows 11 ARM64 runner.
 - `.github/workflows/freebsd.yml`: FreeBSD build + tests (manual run from `release`).
 
-**Only the `release` branch builds.** No build workflow runs on `main` or pull requests; every
+**CI and release builds.** `.github/workflows/ci.yml` runs the shared `cargo xtask ci` gate on
-build job checks `github.ref == 'refs/heads/release'`, so a manual run from another branch is
+every push to `main` and every pull request. Release artifacts are built on `release` pushes or
-skipped. Only `packaging-lint.yml` (no build, no secrets) runs on `main` and PRs.
+manually; manual runs from other branches are dry runs as described above. `packaging-lint.yml`
+also runs on `main` and PRs.
 - Locally: `cargo xtask ci` (fmt, clippy, tests, assets, layers, wasm, parity check).

docs/ui-parity.md

@@ -1,6 +1,6 @@
 # UI parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-29 · **Change:** minor (Ctrl+arrow and Ctrl+Shift+arrow while pointing a formula reference; earlier: editing a hyperlink loads its existing fields; earlier: AutoSum over a selected row puts its total to the right; ribbon catalog count 276 / 292) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-30 · **Change:** minor (checkbox cells print as boxes; earlier: Ctrl+arrow and Ctrl+Shift+arrow while pointing a formula reference; earlier: editing a hyperlink loads its existing fields; earlier: AutoSum over a selected row puts its total to the right; ribbon catalog count 276 / 292) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
 
 Interaction, controls and feel, against Excel. Part of [target-app-parity.md](target-app-parity.md).
 **UI/UX fidelity: ~55% ready, 50–80 h** (estimated). Ribbon command coverage is measured
@@ -194,6 +194,7 @@ scrollbar bugs 2–4 · pixel/feel pass against observed Excel 7–12.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-30 | minor | Checkbox cells print and export to PDF as boxes, as on screen: unchecked white with a grey outline, checked green with a white tick (#2972). They printed their value as TRUE or FALSE; other values in a checkbox cell still print as text |
 | 2026-10-29 | minor | Formula pointing from the keyboard: Ctrl+arrow (⌘arrow) moves the pointed cell to the edge of its data and Ctrl+Shift+arrow (⌘⇧arrow) extends the pointed range there, as the same keys move and extend the selection, so typing `=COUNTIF(`, clicking the top of a column and pressing ⌘⇧↓ points at the whole column of data; the keys used to move or extend by one cell. A range reaching the sheet edge is written as whole columns or rows (`A:B`). The editor reads the modifiers of the arrow's own key event, so a keystroke pressed and released within one frame (a control client's `ui.key`, an automation tool) keeps its Shift and Ctrl |
 | 2026-10-29 | minor | Insert Hyperlink opens with an existing link's address, display text and ScreenTip (#2876). An address-only edit preserves the cell's content and formula; Cancel leaves the link unchanged, and Undo restores the edit |
 | 2026-10-27 | minor | Ctrl with the numpad's + inserts rows, columns or cells as Ctrl+Shift+= does, as in Excel; it did nothing because the numpad key arrives without Shift |

packaging/linux/flatpak/ai.storyteller.gridcraft.bundle.yml

@@ -17,6 +17,7 @@ runtime-version: '25.08'
 sdk: org.freedesktop.Sdk
 command: gridcraft
 finish-args:
+  - --filesystem=xdg-data/ArtCraft/versions:ro
   # Display: Wayland first; X11 only when no Wayland compositor is running.
   - --socket=wayland
   - --socket=fallback-x11
@@ -40,6 +41,11 @@ finish-args:
   - --filesystem=xdg-documents
   - --filesystem=xdg-download
   # Network: update checks reach GitHub. Home/host filesystem access is deliberately not granted.
+# The release runner's flatpak-builder has no eu-strip (elfutils), which its debuginfo pass runs
+# on cups-client's unstripped tools, in whichever module comes first after they're installed. The
+# app's own binaries come from the release tarball, already stripped.
+build-options:
+  no-debuginfo: true
 modules:
   # CUPS client tools for craft-print: the runtime has libcups but not lpstat/lp/lpoptions.
   # Linked statically against this release's libcups, so a runtime update can't break them;

packaging/linux/flatpak/ai.storyteller.gridcraft.yml

@@ -18,6 +18,7 @@ sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
 command: gridcraft
 finish-args:
+  - --filesystem=xdg-data/ArtCraft/versions:ro
   # Display: Wayland first; X11 only when no Wayland compositor is running.
   - --socket=wayland
   - --socket=fallback-x11