The lists only ever build allRows from a rule's first two occurrences
(LIST_OCCURRENCES), but the timeline draws every occurrence the board window
admits. Clicking a bar past the second set openId to an id allRows could not
resolve, so the detail sheet silently failed to open and per-occurrence
completion was unreachable for those bars. occurrenceForId parses the day an
occurrence id names and regenerates just that neighbourhood via occurrencesOf,
so App.tsx can resolve through the rule when the direct lookup misses.
Separately, strandedBy's `if (record.repeat === null) return 0` hid the
warning on exactly the transition where it matters most: a reader marks a
plain event done, then edits it to add a repeat, and the save re-keys every
row from `id` to `id#<date>` with no notice that the mark under the bare id
is about to become unreachable. strandedOccurrences checks the record's own
id when it has no repeat yet, and its next occurrences once it does.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
An occurrence with no stated end runs until the next one opens. That is the
boundary a bare rotation was missing — docs/SOURCES.md declines to publish
arustats' Abyss openings precisely because nothing bounded them — and here
it is entailed by the interval the reader typed rather than invented for
them. The store still holds endsAt: null; only this projection resolves it.
nextOccurrences returns what has not finished rather than what is running,
so a rule between cycles answers "opens Saturday" instead of vanishing for
its whole off week.
The "ancient anchor" test's expected occurrences now include 31 August: with
a six-year-old anchor at 09:00 and a query window opening at midnight, that
day's occurrence (no stated end, so it runs until 1 September 09:00 opens
the next) genuinely overlaps the window's first nine hours — the same edge
rule the sibling "overlapping at either edge" test exists to prove. The
brief's original expected list omitted it.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Replace the local-vs-UTC test with a timestamp that actually straddles UTC
day boundary (00:30 local on 2 September = 22:30Z on the 1st). The original
test was vacuous because both readings agreed on the same calendar day.
Delete the rename-stability test which was a tautology — occurrenceId never
takes a title, so any pure function satisfied it. The real assertion belongs
in a later task where the whole rule is passed in and a rename can be
exercised.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
myevent:<token>#<YYYY-MM-DD>. The token says which recurring thing, the
local day says which time round, and marks, ignores, progress and daily
ticks all key off the whole string — so an occurrence carries its own
completion and its own streak rather than sharing the rule's.
'#' is outside [a-z0-9] and therefore outside CustomEventId, so an
occurrence cannot be written back into the store or survive an import.
That is the guardrail rather than a code path anybody has to remember, and
a test pins it in both directions.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
The app can express a window closing and a day repeating; daily.ts counts
in days and stops there. This is the arithmetic under the rung between
them.
Local wall-clock rather than milliseconds, because a reader's own event is
local throughout — a weekly reset set for 09:00 stays at 09:00 across a DST
transition, where adding 7*DAY would move it an hour and drag every later
occurrence with it. Months clamp to the last valid day rather than letting
setMonth roll 31 February into 3 March, which is the same silent shift
readerInstant already refuses on the way in.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
