160 lines
11 KiB
Markdown
160 lines
11 KiB
Markdown
# Todo
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The plan. Design questions are settled in `AGENTS.md`; remaining spec detail is settled at its own
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milestone. A done item shrinks to its title here; its full text moves to `todo-history.md`.
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## Milestones
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Shipping order: 3h, 3i, 3j, 5a, 5b, 5c, 5d, 5 → `0.1.0`; 4b and 4c → `0.1.1`; 4, 3k → `0.2.0`;
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6, 7 → `0.3.0`.
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The numbering is the order the work was planned in, not the order it ships.
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- [x] **0 — Scaffold.**
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- [x] **1a — The directive grammar.**
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- [x] **1b — Block node syntaxes.**
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- [x] **1c — Inline node syntaxes and marks.**
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- [x] **1d — Corpus start.**
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- [x] **1d1 — The CommonMark subset.**
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- [x] **1d2 — Block nodes.**
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- [x] **1d3 — Inline nodes and marks.**
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- [x] **2 — `adfToMarkdown`.**
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- [x] **2a — The runner and the CommonMark subset.**
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- [x] **2b — Block nodes.**
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- [x] **2c — Inline nodes and marks.**
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- [x] **2d — The opaque carry.**
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- [x] **2e — Carve-outs and combinations.**
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- [x] **2e1 — The carve-outs and the claimed line.**
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- [x] **2e2 — Mark runs and the runs a carry breaks.**
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- [x] **2e3 — Attribute canonicalization and the quoted value's escape.**
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- [x] **2e4 — The carry's fallback triggers.**
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- [x] **2e5 — Combined documents and the collision property.**
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- [x] **2f — The attributes CommonMark cannot hold.**
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- [ ] **3 — `markdownToAdf` (`0.1.0`).** Each sub-item lands the fixtures its own code reads, and
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the runner grows a parse half as they do: readers for `corpus/normalization/` (setext,
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indented code, loose lists, `*`/`+`
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bullets, entity references, soft wraps — one-way, the markdown not canonical) and
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`corpus/errors/` (a markdown input per named error, the code in a `.error` beside it) with
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the first fixture each. `commonmark-subset/` cannot be the first to green — `::paragraph`
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and `:hardBreak{}` sit in it — so 3b through 3f answer to their own tests and the one-way
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fixtures they land, and 3g is where the first directory reads back. The raw-HTML element
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mapping is empty until milestone 6, so at `0.1.0` every raw-HTML construct in input — a
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block, an inline tag, a comment, a processing instruction — is a named error. Input is where
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unbounded nesting actually arrives, so §11's 500 binds all three of the emitter's guards
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here: block depth at 3c and again at 3f's container fences, inline and mark depth at 3f and
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3i, a carried value's JSON at 3j, where `isJsonValue` already bounds it.
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- [x] **3a — The hierarchy.**
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- [x] **3b — The leaf blocks.**
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- [x] **3c — The container blocks.**
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- [x] **3d — Inline text.**
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- [x] **3e — Emphasis and links.**
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- [x] **3f — The directive grammar.**
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- [x] **3g — The node tables read backwards.**
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- [x] **3h — The block nodes.**
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- [x] **3i — The inline nodes and the marks.**
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- [x] **3j — The carry and the combinations.**
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- [ ] **3k — The CommonMark spec suite (`0.2.0`).** Checked in at `corpus/commonmark-spec/`,
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pinned to the version it ships — the one `html-blocks.ts` names for its start
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conditions — `corpus/README.md` gaining the kind.
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**Settled** (the maintainer, 2026-08-27): three checks an example must pass, the reference
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HTML each ships read as corpus data — which adds no format and no direction (§1). §2's
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canonical fixpoint: a named error, or markdown that parses and emits to itself byte for
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byte. That HTML's text, tags stripped and entities decoded, against the parsed document's
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concatenated `text`. And a count of the dozen elements the CommonMark subset covers
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against the marks and nodes they map to — counting distinct mark types per text node, since
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3e collapses a spelling nested inside its own kind and `*(*a*)*` is two `<em>` against one
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`em`. The fixpoint alone is self-consistency a parser
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returning the empty document passes, and the text alone one dropping every emphasis; the
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counts close both. The exception list stays the maintainer's, and one entry is owed
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already: 3h continues a list across the marker change CommonMark splits on, so an example
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the reference HTML gives two `<ul>` counts one `bulletList`. One outcome is no
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exception and must not be filed as one: valid CommonMark parsing to a document
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`adfToMarkdown` refuses is a §2 hole, which is what `corpus/unspellable/` held until 3c,
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3e and 3h landed their answers and emptied it.
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- [ ] **4 — Round-trip property tests (`0.2.0`)**, widening 3j's corpus round-trip past the
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documents a human wrote — the thing that proves 2 and 3 beyond them. Editor-normal (§2) is
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finished here, on 3i's merging — `toEditorNormal(doc)` and the equality the round-trip
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asserts, which over normalized input is the canonical serializer's compact spelling —
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rather than staying spelled inline as `?? []` at every reader. The
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reading half is `nodeContent`/`nodeAttrs`/`nodeMarks` over the ~28 sites spelling it
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inline today, which also lifts the branch floor §10 keeps below 100 for exactly those
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halves.
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Generators emit editor-normal ADF (§2). Real sanitized ADF from live Atlassian APIs lands
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here too (§10), in `corpus/real-payloads/`: an ADF→markdown→ADF check with no expected
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markdown, the payloads supplied by the maintainer. This subsumes 2e5's collision property —
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a document that round-trips proves no other document shares its spelling — so decide here
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whether that gate stays as the parser-free, faster-failing signal or goes; the half holding
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no fixture duplicates is hygiene rather than a round-trip claim, and stays either way.
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- [ ] **4b — The block walk's retry (`0.1.1`).** `emitBlock` walks a subtree twice wherever
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`readableBlock` reads it whole and then gives up — a list item whose first line reads back
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as a thematic break — and the walk below does the same, so the cost doubles per level:
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3.4kB of nested lists takes half a second, depth 20 about eight, depth 24 minutes. It
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predates 3g on both directions, and 3g's `commonMarkSpelling` gave it a second entry point.
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The README's bot and pipeline personas feed markdown nobody typed, so this ships as a hang
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on a small input; §11's scanning rule is the same argument one shape further in. The retry
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is what to remove — one walk answering both the readable question and the directive
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fallback. Memoizing `emitBlock` is the shortcut, and the node reference is the wrong key: a
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caller may hold one node object at two positions, where the cached depth and path are
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another node's. `0.1.0` ships with the retry in it, so a deep document is slow rather than
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wrong until the patch.
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- [ ] **4c — The scanning rule's remaining sites (`0.1.1`).** A trailing-anchored regex re-walks
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its run from every start position, so an interior whitespace run costs quadratic time rather
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than linear — 3h measured 80k spaces inside an ATX heading at 11.3s, and 3ms once the walk
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replaced the regex. Three sites the same sweep did not reach: `normalizeLabel` in
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`link-syntax.ts`, whose shortcut-reference input is `scan.source.slice(...)` rather than the
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999-capped `readLabel` value, and two in `emit/inline-line.ts`. The fix is the one 3h used —
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an index walk, `trimTrailingSpace` where the ends match. A fourth of another shape joins
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them: `readNestedDirective` restarts its depth counter per level, so each parse level
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re-scans the region below it and nested inline directives cost O(depth × content) — 3f's
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cost, which 3i's slot parse doubles rather than changes in class, bounded by the 500-level
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guard. §11's scanning rule is the whole argument; the pipeline persona feeds documents
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nobody typed.
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- [ ] **5 — Ship `0.1.0`.** Only the maintainer's own acts are left (§15): make the Gitea repo
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public (§6), create the `NPM_TOKEN` secret, and open the bump PR that sets `version` to
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`0.1.0` and drops `private: true`, the guard against any earlier publish. `0.1.0` is the
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markdown round-trip: both markdown directions, the types, `isAdfDocument`, proved over the
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checked-in corpus.
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**Settled** (the maintainer, 2026-09-01): the round-trip proved over the checked-in corpus
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is what `0.1.0` ships on, and the open-ended proof work follows it rather than gating it —
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3k's spec suite and 4's generators and maintainer-supplied payloads are `0.2.0`, 4b's retry
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`0.1.1`. A consumer using the library is worth more than a wider proof nobody has needed
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yet, and §8's pre-1.0 rules cover what the wider proof then finds.
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- [x] **5a — Rename to `@larvit/adf-codec`.**
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- [x] **5b — The consumer's error surface.**
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- [x] **5b1 — The error's source position.**
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- [x] **5b2 — The error messages.**
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- [x] **5b3 — The code list and the flavour's gaps.**
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- [x] **5b4 — The README's consumer surface.**
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- [x] **5c — The build and the release pipeline.**
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- [ ] **5d — The browser leg (`0.1.0`).** §6's browser half is checkable on the emitted
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`dist/index.js` a browser can load — the compile gate names no host API, and a real page
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converting the corpus is the other half. Headless Firefox is that page, settling both at
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once: the browser proof, and the only SpiderMonkey there is, the gate's three engine legs
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being two V8s and a JavaScriptCore that is not Safari's. The mechanism is the decision this
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item opens with: a browser leg wants an image, a driver and a way to carry a verdict back
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out, none of which the gate's plain `docker run` per engine has.
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- [ ] **6 — The HTML dialect spec (`0.3.0`).** Element-by-element mapping, the `data-*` fidelity
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scheme, the opaque-carry form, and the documented foreign-element set `htmlToAdf` accepts.
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- [ ] **7 — HTML, ship `0.3.0`.** `adfToHtml`, `htmlToAdf`, the composed `markdownToHtml` /
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`htmlToMarkdown`. CommonMark spec suite runs against `markdownToHtml` from here (§10).
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- [ ] **8 — CLI.** A later goal, shaped around the personas once the library exists.
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## The ADF inventory to cover
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From Atlassian's [structure
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reference](https://developer.atlassian.com/cloud/jira/platform/apis/document/structure/) — not the
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whole schema: real payloads also carry `taskList`/`taskItem`, `decisionList`/`decisionItem`,
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`layoutSection`/`layoutColumn`, `blockCard`/`embedCard`, `extension`/`bodiedExtension`/`inlineExtension`
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and `placeholder`, none documented there. The documented set is the floor: the floor gets designed
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syntax, the rest rides the opaque carry (§3) until it does too.
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| | |
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| --- | --- |
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| Top-level block | `blockquote` `bodiedSyncBlock` `bulletList` `codeBlock` `expand` `heading` `mediaGroup` `mediaSingle` `multiBodiedExtension` `orderedList` `panel` `paragraph` `rule` `syncBlock` `table` |
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| Child block | `blockTaskItem` `extensionFrame` `listItem` `media` `nestedExpand` `tableCell` `tableHeader` `tableRow` |
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| Inline | `date` `emoji` `hardBreak` `inlineCard` `mediaInline` `mention` `status` `text` |
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| Marks | `border` `code` `em` `link` `strike` `strong` `subsup` `textColor` `underline` |
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Plain markdown covers `blockquote`, `bulletList`, `codeBlock`, `heading`, `orderedList`,
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`paragraph`, `rule`, `listItem`, `hardBreak`, `text`, and the `code`, `em`, `link` and `strong`
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marks; `strike` is the flavour's `~~` carve-out. Everything else is what the flavour is for.
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