# Rules - Go runs only through `docker compose run --rm `; the merge gate is `docker build .` plus CI's changelog check. - Tests first, in their own commit; the implementation follows in the next. A re-pin of seeded output or of `testdata/shipped_shape.txt` is its own commit. - A change under `data/` or to the shape pin adds its `CHANGELOG.md` entry under `Unreleased` in the same PR, and so does a change to a flag, an exit code, an exported name, a fence, a builtin or the lowest Go; what is major is the README's Versioning table. - One-line commit messages: no ticket prefix, no repo name, no authorship trailers. - GitHub is where the project lives, so `gh` is the tool: merges are fast-forward only, `gh pr merge --rebase` where the branch is already on top of main. - README goal 2 is gated at 7.0 on the `comprehension-panel` skill, and below it nothing else merges — no feature, no category, no data — bar a security fix, a dependency bump, a repair of a promise goals 3 to 5 make, and the infrastructure the round itself runs on. `todo.md` carries the round: the nine-seat findings run at depth 1, a PR per item it names, then the run again, until the score passes. At or above 7.0 every pull request scores with the four-seat run and answers it in one run. No merge lowers the last score its own panel recorded: the nine-seat round and the four-seat run are two ratchets, never compared with each other. - Hard tabs. No comment by default; delete a restatement, a rationale, history, or a file preamble. - One spelling per result: reject the other at `New`, and let the error name the spelling to use. - Prose naming a source states what that source states: read the register's own field before paraphrasing it, and name the register you read before claiming none publishes a spelling. - A README example is a `json` block that loads and renders as a category; `readme_test.go` runs every one. - Cyclomatic complexity is gated at 14: the table-shaped dispatches (`linkParent`, `compileTemplate`, `renderEdges`) sit at it and stay whole; a function that would pass it is decomposed. # Decisions In [docs/decisions.md](docs/decisions.md): - GitHub is canonical, and the module path names it - The vocabulary sits below `doc.go`'s package clause, not in the package doc - Options and fields share one namespace - `{a|b}` stays beside nested choices - Flags follow getopt_long - An argument is a template by its shape, not by a flag - An inline template skips the cycle fence - An inline template that does not compile is misuse (exit 2), including a reference that resolves to nothing - A padded JSON argument is rejected, not trimmed - `FakeTemplate` and `NewTemplate` both stay - The shipped data is embedded, not discovered - A bare reference draws each time; a reference path is held - Reference sigils follow the filesystem - A change to what exists is a major; a minor only adds - Seeded output is promised within one version - An error is a contract by what it names, not its bytes - Formats are checked after all data is loaded, so their errors name the category - Raising the lowest supported Go is a major - The format check runs on the latest Go only - The changelog heading is the one spelling of a release; CI cuts the tag - A `--data-path` override rebinds every reference to the category it replaces - The repeat cap bounds renders, not bytes - 64-bit targets only - A constant zero divisor is a load error; in a string column a divisor that is not constant prints `Inf` - In data, a default written out and a constant spelled as a sample are load errors - Samples say what they emit, transforms what they do - A record is a template seen as columns; a Go struct is the one second schema - A struct's records follow Go's field access, and compile on first use - A render shares one reference draw per category, per group - A draw group name is local to its category - The expansion hold and the render's draws are two fences - A hold set makes its draw maps on the first read - A category never references itself, and a record's fences run at load - A record's column set is fixed before the first draw - Null is a `null` item, not a rate - A typed column holds one value, not composed text - A column of one reference alone is the column it reads - A typed column's calc is refused unless proven - `Column` carries text, not a Go value - `hold` names what a draw is kept in, `readValue` what a read drew - One name, one meaning - The package stays flat - The performance gate asserts allocations, not wall-clock time - Rows live in a TSV, the shape in JSON - A selector is bracketed, and a dot inside it is literal - `parent` names the link column and the table alike - After a row, a path names a column or a linked table - A selected row is fixed, not drawn, and an unnamed read beside it is refused - A link column after a row steps up to the parent row, and a path may not end on it - A table selects by one key column, a code, never a free-form name - A parent row with no child row is a load error - The choice-of-rows fence guards a data file's root, and requires string fields - A table is a record of string columns - The key map is built at load, the rest on first draw - Two categories may name one TSV - A table never reaches its own family, by any route - Tables carrying token cells stay small - A path is walked once without drawing before it is walked for real - A country's postal codes and streets are siblings under its locality - A locale's `address` reads its country's `geo` tree, so the shipped set loads whole - The default embed holds every Swedish postort the import can place and give a street-delivery code and a street, and the US places of 25,000 or more - A locale's `address` restates its country record's format - A postort's kommun comes from its name, its tätort or its codes, never from distance - A highway designation is not a street, and a US postal code belongs to the place holding most of its land inside places - `--list` stays a plain list of paths - A layout is always quoted - A title is a table under `sex` - A table owns the spelling of a selector on it - No builtin reads the clock, so a date is bounded by days, never by an age - `misc` is what every locale shares - A register's canonical spelling loses to the one its domain writes - `misc.territory` is the spine, and a `misc` table naming a territory links to it - A table whose register publishes no frequency draws evenly - `misc.timezone` weighs a zone by the people living in it - `misc.car` is one flat table, not a make linked to its models - `misc.territory` names its sovereign in a column, and there is no `misc.country` table - `misc.loglevel` is a table keyed by POSIX's keyword, carrying the code - `misc.tld` keys carry the leading dot, where other tables key on a bare code - `misc.tld` is a table of its own, and `misc.territory.tld` stays a column - `misc.territory` carries a currency code, it does not link to `misc.currency` - An extension may name two media types - The Swedish ids draw Skatteverket's test series - The US given names come from a mirror of the SSA file - `List` advertises direct descents only - Each entry point to `drawFence.hasRead` says what its caller gets - The four path walks are four loops