# Plan

Ordered as the releases that ship it. Research notes:
`~/code/claude-handoffs/fejkdata/2026-09-16/`.

## v0.1.0

### Data

Shape: T = table, t = template, c = choice. Every factual list is read from a
register by a `data-import/` script, per README goal 10.

- Add the remaining `misc` tables and templates from the table below, closing step 4.
- Read `misc.emoji` from the Unicode `emoji-test.txt` register, and `misc.car` from an
  international make and model source; vPIC and Mobility Sweden are national, so they
  build `en_US.car` and `sv_SE.car`.
- Add the remaining locale categories: company, phone, finance, vehicle, words.
- Give every shipped category building-block columns, `misc.uuid` → `variant` among
  them, and one record shape across the national ids; re-pin the shape.
- Give the address records one column set across countries: `region` and
  `municipality` as columns on `geo.SE.address` too.
- Fill the 398 Swedish localities weighted 200 from SCB småorter.
- Accept a middle name, and draw a shipped `personnummer` inside a *selected* sex;
  both want a draw group sharing its family's pins. Stop the conflict error naming a
  rewrite that returns a different value where the read it conflicts with sits inside
  another category, and report a struct column's draw conflict with the path spelling
  a tag takes.
- Let `geo.SE.locality[Lund].address` descend from a selected row into the template
  beside the family: the path step reaches a sibling category and the outer selector's
  pins seed every draw group of the render.
- Decide whether `email.local` and `username` share one handle list — a reference
  between shipped categories is a major once tagged, so it lands before v0.1.0 or not
  at all.

`misc` (locale-neutral)

| Category | Shape | Source | Licence |
|---|---|---|---|
| `httpmethod`, `port`, `tld`, `protocol`, `loglevel` | T/c | IANA | CC0 |
| `ip` v4 documentation ranges, private, CIDR; `ipv6` `2001:db8::/32`; `mac` locally administered | t | RFC 5737, 1918, 9637 | facts |
| `creditcard` per network: IIN, length, CVV, expiry | T+t | network rules, `{luhn()}` | facts |
| `bic`, `isin`, `cusip` | t | structure rules | facts |
| `ean`, `upc`, `gtin`, `isbn`, `issn`, `imei`, `asin`, `sku` | t | check-digit rules, GS1 demo prefix 952 | facts |
| `product` name, adjective, material, department, `garmentsize` | T/c | LLM-written lists | — |
| `airport` IATA, ICAO, territory, municipality; `airline`; `aircraft`; `flight`, `seat`, `pnr` | T+t | OurAirports, Wikidata | public domain, CC0 |
| `element`, `unit`, `planet` | T | PubChem, BIPM, NASA | public domain, CC BY 4.0 |
| `animal` by class, `plant` | T | Wikidata | CC0 |
| `bloodtype` weighted (global) | c | AABB | facts |
| `color` named, hex, rgb, hsl, cmyk | T+t | CSS Color 4, XKCD | W3C, CC0 |
| `programminglanguage`, `os`, `browser`, `database` column/type/engine, `fileext` | T/c | Linguist, curated | MIT |
| `commit` message, branch, `sha` | t | LLM-written, `{hex(40)}` | — |
| `password`, `hash`, `jwt`, `slug`, `hostname`, `avatar`, `placeholderimage` | t | shapes | — |
| `book` title, author; `genre`; `instrument`; `dish`, `ingredient` | T | Gutenberg catalog, MusicBrainz, USDA | CC0 |
| `lorem`, `hacker`, `hipster`, `catchphrase`, `buzzword`, `quote` | T/c | lorem ipsum, LLM-written | — |
| `direction`, `continent`, `ulid` | c/t | — | — |

`sv_SE` (`research-sources-se.md`)

| Category | Shape | Source | Licence |
|---|---|---|---|
| `person` title, birthdate, age, blood type weighted | t | geblod.nu distribution | facts |
| `organisationsnummer` by form, `vat` | t | Bolagsverket group digits, Luhn, `SE…01` | facts |
| `company` name patterns, legal form weighted | t | Bolagsverket registrations 2025 | CC BY 2.5 SE |
| `sni` industry codes | T | SCB SNI 2025 | "Källa: SCB" |
| `ssyk` occupations | T | SCB SSYK 2012 | "Källa: SCB" |
| `phone` mobile, fixed per area code, E.164 | T+t | PTS numbering plan 2024 | facts |
| `bankgiro`, `plusgiro`, `bankaccount` clearing + Luhn/mod-11 | T+t | Bankinfrastruktur CSV, Bankgirot rules | facts |
| `licenseplate` `ABC 123`, `ABC 12A`, blocked combinations | t | Transportstyrelsen | facts |
| `car` make, model weighted by registrations | T | Mobility Sweden 2025 | cite |
| `word` noun, verb, adjective, adverb; `sentence` | T+t | SALDO | CC BY 4.0 |
| month and weekday names, `holiday` | t+T | CLDR sv, lag 1989:253 | Unicode |
| `territory` localised names keyed by alpha2 | T | CLDR sv territory names | Unicode |

`en_US` (`research-sources-world.md`, part1–4)

| Category | Shape | Source | Licence |
|---|---|---|---|
| `ein` valid ranges | t | IRS | facts |
| `company` names, suffix, `naics` | t+T | SEC tickers for patterns, NAICS 2022 | public domain |
| `phone` NANP with valid NPA/NXX | t | NANPA rules | facts |
| `routing` ABA with check, `bankaccount` | t | Fed prefix ranges | facts |
| `licenseplate` per state | T | hand-authored patterns | facts |
| `car` make, model | T | NHTSA vPIC | public domain |
| `word`, `sentence`, `paragraph` | T+t | Moby POS or WordNet | public domain / WordNet |
| month and weekday names, `holiday` | t+T | CLDR en | Unicode |

### Builtins the data cannot express

- Add `{isin()}` (Luhn over letters expanded to digits), `{cusip()}`, `{aba()}`
  (3-7-1 weights) and `{vin()}` (position 9 over the whole; a sample taking the WMI,
  since the check sits mid-string).
- Add `{base64url(n)}` for JWT shapes.
- Add a `unix` layout to `date()` once something needs it.

### Open questions to settle

- Decide whether `misc.browser` becomes a parent of `misc.useragent`, so
  `misc.browser[Chrome].useragent` resolves. Adding a `parent` after v0.1.0 is a major.
- Decide whether `misc.timezone` keeps every zone tzdb names: one added recently,
  `Europe/Kyiv` among them, is rejected by a consumer resolving it against older
  tzdata, and the population weight makes that zone likelier, not rarer. Today the
  README names the action a reader takes instead; narrowing what ships is the
  alternative.
- Decide whether `misc.territory.country` is renamed `sovereign`: it holds a code, and
  `country` collides with the `misc.country` path it replaced. A rename after v0.1.0
  is a major.
- Decide whether `parent: territory` stays, given a `--data-path` override of
  `misc.territory` now fails `New` unless `misc.timezone` is overridden with it.

### Release

- Move the README's Decisions section to `docs/decisions.md`, leaving a one-line index
  of the titles in `AGENTS.md`, and drop the `AGENTS.md` line pointing decisions at the
  README.
- Rewrite `CHANGELOG.md`'s `[Unreleased]` as what v0.1.0 holds: nothing has shipped, so
  "no longer paths", "where it used to fail" and "where it used to be an empty string"
  describe versions no reader can have installed.
- Ship prebuilt binaries so the CLI needs no Go: GoReleaser attaching them to the Gitea
  release the tag workflow publishes, a container image, Homebrew and Scoop. A checkout
  build prints `devel` for `--version`; the binaries carry the stamped tag.

## v0.2.0

- Ship the full registers as packs, each a Go module with its own `embed.FS` and a zip
  for `--data-path`: every US place of 10,000 and more streets per locality, built by
  `--min-population` and `--streets-per-locality`. The default embed stays under ~1 MB
  per country and `New` under ~50 ms.
- Add the locales nb_NO, da_DK, fi_FI, de_DE, en_GB, nl_NL, fr_FR and es_ES, with
  person, address, phone, national id, company and date names each, and the `geo` trees
  NO, DK, FI, NL, FR, AU, CA, ES, GB and DE under them.
- Add `{btc()}` and `{eth()}`, which need sha256 and keccak for Base58Check and EIP-55.
- Pair a street with its exact postnummer, which needs an application to Lantmäteriet;
  today a street goes to the nearest postal code centroid.
- Publish a homepage with an in-browser generator: the library compiled to WebAssembly,
  so visitors generate as much data as they like in their own browser.