# Prime: recurring weekday schedule

**Date:** 2026-06-02
**Status:** Approved

## Problem

The Prime feature fires a single non-interactive "ping" prompt to warm up the
Claude usage window. Today a schedule is defined by a **date range**
(`StartDate`/`EndDate`) plus a `TimeOfDay` and a single `WorkdaysOnly` toggle.
This is awkward for the real use case: the user wants a *recurring* morning ping
on specific weekdays, not a bounded calendar window.

Desired behavior: pick the **days of the week** (e.g. Mon–Fri) and a **time**.
The schedule recurs forever. Whenever the worker is running and it is one of the
selected days, the ping fires at (or shortly after) the chosen time. Concretely:
the worker autostarts on login, detects it is an eligible day around the target
time, and fires the ping.

## Decisions

- **Catch-up window:** unchanged. Keep the existing 30-minute catch-up — if the
  worker boots within 30 min after the target time, the ping fires immediately;
  otherwise it waits for the next eligible day. (User chose "keep current 30 min".)
- **Day picker UI:** seven compact **toggle buttons** in one row (Mo Tu We Th Fr
  Sa Su), highlighted when selected — not labeled checkboxes.

## Design

### 1. Data model

`PrimeScheduleEntity` (`ClaudeDo.Data/Models`):

- **Remove:** `StartDate`, `EndDate`, `WorkdaysOnly`
- **Add:** `Days` — a `[Flags] enum PrimeDays` (`Monday=1, Tuesday=2, Wednesday=4,
  Thursday=8, Friday=16, Saturday=32, Sunday=64`), stored as a single
  `days_of_week INTEGER` column.
- **Keep:** `TimeOfDay`, `Enabled`, `LastRunAt`, `PromptOverride`, `CreatedAt`.

Rationale for a bitmask over a CSV string or 7 bool columns: one column, trivial
EF mapping (int), and a clean eligibility check.

`PrimeScheduleEntityConfiguration`: drop the `start_date`/`end_date`/
`workdays_only` property mappings; map `Days` to `days_of_week` (int, required,
default 31 = Mon–Fri).

### 2. Scheduling logic — `NextDueCalculator`

- Drop all `StartDate`/`EndDate` gating (the `EndDate < today` early-out, the
  `StartDate > today` clamps, and the bounds check in `IsEligibleDay`).
- `IsEligibleDay(s, d)` becomes: does `s.Days` contain the flag for
  `d.DayOfWeek`? (Map `System.DayOfWeek` → `PrimeDays`.)
- The existing forward search (loops up to 8 days ahead) now simply walks to the
  next selected weekday.
- `alreadyFiredToday` (compares `LastRunAt`'s local date to today) is unchanged.
- The 30-min catch-up (`FireImmediately`) is unchanged.
- A schedule with `Days == 0` (none selected) is never eligible. UI validation
  prevents saving that state.

### 3. UI — `SettingsModalView.axaml` + `PrimeScheduleRowViewModel`

Row template changes:
- **Remove** the `ThemedDatePicker` (range) and the single "Mon–Fri" checkbox.
- **Add** a horizontal row of 7 `ToggleButton`s (Mo Tu We Th Fr Sa Su), styled
  to highlight when checked, bound to seven bool properties on the row VM.
- Keep the enabled checkbox, the time `TextBox`, the last-run label, and the
  remove button.

`PrimeScheduleRowViewModel`:
- Replace `StartDate`/`EndDate`/`WorkdaysOnly` with seven `[ObservableProperty]`
  bools: `Monday`…`Sunday`.
- Constructor decomposes `dto.Days` into the seven bools.
- `ToDto()` composes the seven bools back into the `Days` int.

`PrimeClaudeTabViewModel`:
- `AddSchedule` default: Mon–Fri selected, time 07:00, enabled.
- `Validate`: replace the `StartDate > EndDate` check with "at least one day must
  be selected"; keep the time-range (00:00–23:59) check.

Update the explainer `TextBlock` text to describe weekday recurrence (keep the
"fires immediately if started within 30 minutes of the target time" note).

### 4. Migration

New EF Core migration in `ClaudeDo.Data/Migrations`:
- Add `days_of_week INTEGER NOT NULL DEFAULT 31`.
- Backfill from existing rows: `workdays_only = 1` → `31` (Mon–Fri),
  `workdays_only = 0` → `127` (all 7 days).
- Drop `start_date`, `end_date`, `workdays_only`.
- Update the model snapshot.

### 5. DTOs

Both copies of `PrimeScheduleDto` (Worker `ClaudeDo.Worker.Prime` and UI
`ClaudeDo.Ui.Services`) are passed over SignalR and must stay structurally
compatible. In both: remove `StartDate`, `EndDate`, `WorkdaysOnly`; add a single
`int Days` field (serializes cleanly as JSON; avoids sharing the enum across
projects). `PrimeScheduler.ToDto` maps `entity.Days` → `(int)`.

`PrimeScheduleRepository`: update `UpsertAsync` (copy `Days` instead of the three
removed fields) and `ListAsync` ordering (order by `TimeOfDay` instead of
`StartDate`).

### 6. Tests

- `NextDueCalculatorTests` — rewrite cases around weekday sets (e.g. Mon–Fri
  skips weekend; single-day schedule; catch-up still fires; already-fired-today
  skips to next eligible day).
- `PrimeSchedulerTests` — update fixture DTOs to the new shape.
- `PrimeScheduleRepositoryTests` — update entity construction and assertions.
- `PrimeClaudeTabViewModelTests` — update for the day-bool VM and new validation.

## Out of scope

- Per-schedule catch-up tuning (rejected; fixed 30 min).
- Multiple times per day, timezones, or holiday calendars.
