Answer prose round 1: the + from the year its holder turns 100, in both Swedish ids, from 2030

todo.md

@@ -68,7 +68,7 @@
 | 79 | 0.1.0 | decision | **Beside a `--data-path`, load in `New` the user's categories, the shipped ones they override or read, and the shipped ones whose reads reach an overridden one; load the rest on first reach.** | 6 | 6 | 7 | 8 | 12 | 13.7 |
 | 87 | 0.1.0 |  | **Split the README's last Records paragraph into one paragraph per rule, name the two shapes "either shape" means, and define or replace "a field hold".** | 1 | 2 | 4 | 6 | 11, 11.3 | 12.5 |
 | 58 | 0.2.0 |  | **Ship prebuilt binaries, a container image, and packages for Homebrew, Scoop and the biggest Linux package managers, so the CLI needs no Go.** | 3 | 7 | 8 | 9 | 1.1, 7 | 29.2 |
-| 26 | 0.2.0 | defect | **Draw a `sv_SE.personnummer` aged 100 or more with the `+` separator Skatteverket spells, its age counted from a date the caller gives.** | 3 | 4 | 7 | 8 | 4 | 23.6 |
+| 26 | 0.2.0 | defect | **Spell a `sv_SE.personnummer` and `sv_SE.samordningsnummer` with the `+` Skatteverket uses from the year its holder turns 100, counted from a date the caller gives.** | 3 | 4 | 7 | 8 | 4 | 23.6 |
 | 81 | 0.2.0 | decision | **Refuse at load every `calc` operand not proven numeric and every divisor not proven nonzero, in a string column too.** | 4 | 4 | 6 | 8 | 6.1, 4 | 20.6 |
 | 36 | 0.2.0 |  | **Report every mistake a load finds in one error, as the decision "A load reports every mistake at once" states.** | 5 | 6 | 7 | 8 | 6 | 19.5 |
 | 41 | 0.2.0 |  | **Key every table by one key column, as the decision "A table selects by one key column, a code, never a free-form name" states.** | 6 | 7 | 7 | 8 | 5.7 | 19.1 |
@@ -254,9 +254,9 @@ Needs item 4, which rewrites the draw-group rule this paragraph states. The last
 
 GoReleaser attaches the binaries to the release the tag workflow publishes, and builds deb and rpm packages, an Alpine APK and an AUR package beside Homebrew and Scoop. A checkout build prints `devel` for `--version`; the binaries carry the stamped tag. v0.1.0 ships first, so it can be tested before it is packaged.
 
-### 26. Draw a `sv_SE.personnummer` aged 100 or more with the `+` separator Skatteverket spells, its age counted from a date the caller gives.
+### 26. Spell a `sv_SE.personnummer` and `sv_SE.samordningsnummer` with the `+` Skatteverket uses from the year its holder turns 100, counted from a date the caller gives.
 
-The format hard-codes `-`, and the 1930 floor makes the oldest draws invalid from 2031. A system holding Swedish personnummer often breaks on the `+`, so a fixture carrying one is a valuable test. Whether a number takes `+` depends on the day it is read, which the decision "No builtin reads the clock, so a date is bounded by days, never by an age" keeps out of the generator. When this item is picked, first explore how a caller gives a render input data, such as today's date: inside the template, as a plain option like `WithNow` and `--now`, or both. Goal 9 holds only while that date is an input, never the clock read silently.
+Both formats hard-code `-`, and their earliest birthdate, 1930-01-01, makes the oldest draws invalid from 2030. A system holding Swedish personnummer often breaks on the `+`, so a fixture carrying one is a valuable test. Whether a number takes `+` depends on the date it is read, and the decision "No builtin reads the clock, so a date is bounded by days, never by an age" forbids a builtin from reading that date off the clock. When this item is picked, first explore how a caller passes data, such as today's date, to a render: in the template, as a plain option like `WithNow` and `--now`, or both.
 
 ### 81. Refuse at load every `calc` operand not proven numeric and every divisor not proven nonzero, in a string column too.