fejkdata/todo.md

Plan

Ordered as the releases that ship it.

v0.1.0

Comprehension, until the panel scores 7.0

Nothing else ships while the score is under 7.0 — no feature, no category, no data — bar what AGENTS.md excepts, per README goal 2. This section is one round, replayed: the comprehension-panel skill's nine-seat findings run at depth 1, a PR per item it names, then the run again, until the score passes. The run is the nine-seat one: the round is meant to buy architectural change, and the four-seat scoring run names too little to steer one. A fresh run replaces the items below.

Scores, newest last: 5.9 on 2026-09-20 (Navigation 7.0, Locality 5.2, Shape 5.9, Self-sufficiency 5.7); 5.8 on 2026-09-22 (Navigation 6.7, Locality 5.0, Shape 5.9, Self-sufficiency 5.6); 5.7 on 2026-09-26 (Navigation 6.7, Locality 5.0, Shape 5.8, Self-sufficiency 5.6), every seat capped by Locality, and all nine naming drawWalk.walk among the hardest; 5.7 on 2026-09-28 (Navigation 6.7, Locality 5.1, Shape 5.8, Self-sufficiency 5.7), every seat capped by Locality, all nine naming drawWalk.walk and the four path walks among the hardest; 5.8 on 2026-09-29 (Navigation 6.8, Locality 5.3, Shape 5.8, Self-sufficiency 5.7), seven seats capped by Locality, all nine naming drawWalk.walk hardest and eight the unit they would least modify; 5.7 on 2026-09-29 again (Navigation 6.6, Locality 5.2, Shape 5.9, Self-sufficiency 5.8), four seats capped by Locality, six of the seven unit seats ranking readSurvey.walk hardest and all seven the unit they would least modify; 6.1 on 2026-09-29 a third time (Navigation 7.0, Locality 5.6, Shape 6.3, Self-sufficiency 6.1), every seat's lowest dimension Locality, all seven unit seats ranking the readSurvey walk or check hardest and the unit they would least modify.

This round, in order:

• Key the survey's visits and reads by a pin set's rows spelled as a string, and delete pinsID, pinsLink and readSurvey.pinIDs: five seats stalled on the interning. Start replayPairs' pin set as a clone of the earlier read's pins, deleting the replay into an empty set, which cannot fail since pinRow built those pins.
• Move checkOwnFamily into readsurvey.go beside checkFamilies, and checkNestedDrawGroup into node.go beside drawGroupOf, the compile step calling it; delete checkColumnDraws for surveyColumns(…).check() at its caller. Both architects found the family fence in two files, and draw-group checks of two lifecycles in one.
• Replace formatOps' held, holder and pathHeads with one map from a held name to its first reader and the path it starts, if any: four seats traced formatOps.holdName writing four fields at once.
• Give arm its head as written, set where splitArm splits, and build pathProbe.readRow's selector spelling from it: six seats found the slice of arm.spelling by len(joinSegments(tail)) resting on an invariant nothing states.
• Pick disagreement's fix through a named itemKind comparison: six seats could not see that the kinds' declaration order is the rule.
• Give tableSite one test for a cell, and have traceRead report no row outside a table: the zero value reads as row 0, a real cell, so each reader tests table first.
• Rename ftoken to scanUnit, beside formatToken, and session to generatorState: three seats confused the token types, and both architects read session as per-render state.
• State at pinSet.pin that its caller proved r sits inside the nearest pinned ancestor, which pinRow and drawIn do.
• Delete the prose two or more seats found empty: loadData's comment, which also names linkRefs where bind runs, table.drawRow's, table.selector's, and render.go's second and third "compile validated" notes.
• Run the nine-seat panel again and file what it names here.

Data

Shape: T = table, t = template, c = choice. Read every factual list from a register by a data-import/ script, as README goal 12 asks.

• Fetch NVDB through source.fetch in data-import/geo-se.py: nvdb_segments calls urllib itself, with no retry and no User-Agent.
• Test that every geo tree holds the five table names and the address columns the README says port across countries: nothing checks it, and a new country breaks it silently.
• Strip the whitespace data-import/territory.py copies from its register: misc.territory[CW].capital renders Willemstad, with a leading space.
• Place xlsx cells by their r reference in data-import/xlsx.py: a sheet omitting an empty cell shifts every later column left.
• Spell misc.creditcard's digit runs {digits(n)}, and refuse a repeat over a lone {digits(1)} at New, naming that spelling: both render the same run.
• Add the remaining misc tables and templates, one row of the table below per chunk.
• 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.
• List title in both locales, and sv_SE's birth-number, in the README's Data list of what each locale carries, which names neither.
• Give url and email a path that draws only domains nobody can register, keeping the wide set as the default, per goal 14: 17 of the 40 distinct ones shipped today sit on .se, .nu, .io and .co, which anyone may register, and only RFC 2606's example.com, .net, .org, .test, .example, .invalid and .localhost provably reach nothing.
• Audit the rest of the shipped set against goal 14 and give each a never-reaching path where it lacks one: phone draws live PTS and NANP ranges — PTS's five fiction series are the Swedish inert set, sourced in research-sources-se.md, and the NANP one still wants a source — and bankgiro, plusgiro and routing draw live prefixes.
• Stop misc.territory[EH].tld rendering .eh, the one shipped TLD misc.tld does not hold: ISO 3166 reserves it for Western Sahara and the root zone has never been delegated it, so no resolver answers for it and goal 3 promises otherwise.
• Draw en_US.phone's exch as a NANP central office code: {int(100,999)} renders a leading 1 in about an eighth of draws, which libphonenumber rejects, and TestShippedUSPhone proves the shape rather than the rule. Assert the rule with it.
• Give a sv_SE.personnummer over 100 the + separator Skatteverket spells, or stop drawing birthdates that reach 100: the format hard-codes -, and the 1930 floor makes the oldest draws invalid from 2031.
• Merge en_US.ip and sv_SE.ip, today byte-identical, into one misc.ip, per goal 4's one spelling per result.
• 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.US.locality[1714000].address descend from a selected row into the template beside the family: require the path step to reach a sibling category, and seed every draw group of the render from the outer selector's pins.
• Read email.local's and username's handles from the shipped name tables, which goal 12 asks for and the hand-written list they use today does not meet. Keep the handle shape: username shortens a surname to ahl or sjo, and the US one draws unisex given names, neither of which falls out of the tables unaided.
• Draw email.local from username, so the two share one handle list.
• Rename misc.territory.country to sovereign, per goal 4: it holds a code, and country collides with the misc.country path it replaced.
• Add misc.browser as the parent of misc.useragent, so misc.browser[Chrome].useragent resolves, per goal 3.
• Group data/misc into folders where a group name makes a path easier to guess, per goal 4.

misc (locale-neutral)

Category	Shape	Source	Licence
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 (source research)

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 (source research, and part1–part4)

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.

Library and CLI

• Compare calcParser.binary's operator as a rune: byte(p.rs[p.pos]) reads U+012B ī as +, so {calc(a ī b)} compiles as a + b.
• Stop the columnKinds suggestion naming a field's own kind or a narrower one: an int64 or float64 field unproven in range is told to become itself, and a uint64 one to become int64.
• Say in the README's Linked tables that the first table a render reads decides whose weights govern the family: geo.SE.address reads street first, so it draws by street segments and the region, kommun and postort populations never apply.
• Parse defaultTable's path with the library's grammar: the CLI counts brackets of its own, so a change to the selector grammar desyncs the default --table silently.
• Step up from a row to its parent as the decision "A link column after a row steps up to the parent row, and a path may not end on it" states, refusing a step back down: city[Oslo].country.name is a load error today, and city[Oslo].country renders the cell NO, as locality.municipality does, which List stops advertising. Replace the README's city[Oslo].country example with fejkdata -d ./mydata 'city[Oslo].country.name', rendering Norway.
• Key every table as the decision "A table selects by one key column, a code, never a free-form name" states: geo.SE.municipality[Lund] and misc.territory[Sweden] select a row today.
  • Have a selector that misses name the key of every row whose cell spells it, matched without case, else say the table selects by its key: misc.territory[Sweden] and misc.territory[se] name [SE], misc.protocol[tcp] its key, and misc.loglevel[Error] [err].
  • Delete the name option and the load checks it carries, a name spelling another row's key and a name repeating inside its parent, and have New refuse a table still carrying name, naming key.
  • Key misc.loglevel on keyword, and geo.SE.locality on the integer data-import/geo-se.py assigns as the decision states, linking street and postal-code by it.
  • Drop key from last-name and sv_SE.title, and re-pin testdata/shipped_shape.txt.
  • Leave no selection by name in README.md, CHANGELOG.md, docs/ or --help: no selector spelling a free-form name, geo.SE.locality[Lund], misc.currency[Euro], first-name[Kim] and the rest, no "key or name", "by name" or "either" wording about selectors, and no name option in an example.
• Render selected rows as the decision "A selected row is fixed, not drawn, and an unnamed read beside it is refused" states: New refuses {/misc.territory[SE].capital} / {/misc.territory[FI].capital} today, and a choice whose items select different rows. Have the refusal of an unnamed read name the rewrite through each selection: beside {/geo.US.locality[1714000].name}, {/geo.US.municipality.name} names none today, where {/geo.US.locality[1714000].municipality.name} holds once the step up above lands. Scope the README's "A reference path into a category is held" to a path that selects no row.
• Refuse a struct tag's datatype naming the Go type that sets it before proving its values, as the README's Library section promises: datatype: boolean over {int(1,2)} on an int field answers prints an integer, not a boolean.
• Call templateError a compile failure: its doc says render failure, and it wraps what NewTemplate and NewRecordTemplate refuse.
• Report the same error every load for a table with two bad options, and for a folder with two unnamed rows files: readTableOptions and loadDir return on the first in Go's map order.
• Report a CRLF rows file holding only its header as having no rows: parseRows answers "line 2 is empty".
• Reword prove's refusal of a typed column reading a row, {/region}: say the format is the table's own (region's format "{name}"), name the read to write, {/region.<column>} with its columns, and stop calling a one-column format, {code}, composed text.
• Keep one copy of the selector characters in data-import/: httpmethod.py and protocol.py each copy inSelector, and tsv.py's write enforces neither.
• Refuse two whole reads of one table family in one render, which goal 5 promises is a load error: {/sel}|{/sel} panics out of Fake where the two draws land on rows whose cells select different rows of another table, and {/geo.SE.locality}|{/geo.SE.municipality} renders a locality outside the municipality beside it. Each read draws its own row, so cells of two rows render together, where the fence counts them alternatives and compares neither. Have the error name the path spelling that holds, {/geo.SE.locality.name}|{/geo.SE.municipality.name}, as the README's rule on a rejected spelling asks.
• Name the file a link error comes from beside its category path, sub.x (/d/a/sub/x.json): …: with several --data-path layers the author has to work out which directory won, while a parse error on the same file names it.
• Name the row a refused read sits in: where both reads come from TSV cells the overlap error names the category and the two columns but no row, so the author greps a register-sized file for the cell — and "name the fields you want instead" rewrites a cell that is not the one to fix.
• Spell a table one way across the family errors: checkFamilyPair names drawn.category, pinRow names t.path and mustRow panics with t.category, so one table is territory and misc.territory, and the short spelling names no file where two folders hold that name.
• Let a table column carry a datatype, so --format json writes "safe": true and --format sql a boolean rather than the text 'true'. Today only a JSON field takes one, so misc.httpmethod's booleans are typed in Go and text everywhere else. Typing a shipped column changes what json and sql write, so the capability is a minor and applying it to misc.httpmethod is a major.

Release

• Read the tag through git/ref/tags/{tag} in publish_release.py: GitHub answers tags/{tag} with 404 whatever exists, so the burnt-version guard never fires and a release lands on a tag already pointing at another commit.
• Document NewRecordTemplate, ErrNoColumns, ErrNoData and MaxRepeat in the README's Library section, which names none of them.
• Build on a manual run of test.yml: workflow_dispatch leaves github.event.before empty, so the diff compares HEAD with itself and skips docker build.
• 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

• Promise in Generator's godoc that its renders run one at a time, so a caller wanting parallel throughput makes one generator per goroutine.
• 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 their address reads by reference; AU and CA get a tree with no locale of their own.
• 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. It rewrites shipped rows, so it is a major once 1.0 is cut and a minor before that.

v0.3.0

Names no items yet, so planning it is a chunk of its own: it takes the additive work that lands after v0.2.0, and it has to add something, since a minor only adds. Its job is to be the release with no breaking change that v1.0.0 waits on — v0.2.0 cannot be, because pairing a street with its exact postnummer rewrites shipped rows.

v1.0.0

• Cut it once the shipped data is in its record shape and one full minor has shipped with no breaking change, per the README's Versioning table: v0.1.0 settles the record shape and v0.3.0 is the quiet minor.
• Announce it where a developer choosing a fake-data tool already reads, which is goal 1's second half and waits for the tag: complete, stable, installable without Go. Write the README's first screen for someone deciding in a minute.

Not release-bound

• Give every entry in docs/decisions.md the goal it serves, its date, who made it and the premise it rests on; propose a goal for an entry that serves none.
• Hold every change the charter says owes a CHANGELOG.md entry to one in CI: the check covers data and testdata/shipped_shape.txt alone, where AGENTS.md adds a flag, an exit code, an exported name, a fence, a builtin and the lowest Go.
• Measure the allocation gate over the shipped geo trees too: pinSet.inline [8] is sized for them, and perf_test.go checks a synthetic five-deep tree only.
• Name goal 2's four criteria with the axes the panel scores, so a recorded score maps back to the clause it came from: the goal spells them out in prose while todo.md records Navigation, Locality, Shape and Self-sufficiency.
• Delete doc.go's "The draw fences are …" sentence: it names a function, a type and a helper reached only through readSurvey.check, and misses checkDrawGroup, checkOwnFamily and checkColumnDraws; the README's Layout indexes the fences by file. Say "fences" in the pin entry then, which names the draw fences too.
• Cut the README's Layout block to the lines that say what a file name cannot: calc.go, doc.go and cmd/fejkdata/ restate their names.
• Cut AGENTS.md to the rules only it states: the round procedure stands word for word in todo.md and the gh rule opens with the README's GitHub decision, so each is a second copy that drifts. Split the comprehension rule while there, which packs the gate, its exceptions, the round and the at-or-above-7.0 regime into one line.
• Scope AGENTS.md's Hard tabs. to the Go source, or drop it: gofmt already gates Go at Dockerfile:16, and the shipped JSON under data/ is two-space, so the rule as written is one no Go file can break and every data file does.
• Make gitea.larvit.se/larvit/fejkdata a pull mirror of GitHub: Gitea converts a repository to a mirror only by re-creating it, so until that runs the copy there is a second owner of one history and goes stale from this commit.
• Stop /cache collecting root-owned files, which today every command documented without --user leaves for the next --user one to trip over, and which the README answers with a chown a reader has to repeat. Put --user on all of them, or give the x-go anchor a user: — that one needs a mechanism, since Compose interpolates from the process environment and neither UID nor GID is exported there, so user: "${UID}:${GID}" resolves to ":".
• Spell the latest supported Go once: Dockerfile's ARG GO_VERSION and compose.yaml's golang:${GO_VERSION:-…} pin one version twice, and a bump that moved only the first left docker compose run --rm fmt formatting to a gofmt the gate rejects. A renovate.json custom manager reads the second today; drop it with the duplication.
• 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.