Pick a different movement pattern every time a sweep is triggered, so the
motion varies across the day instead of repeating one shape.
- strategies.ts: add the `random` sentinel, `SELECTABLE_PATTERN_NAMES`,
`isSelectablePattern`, and `createRandomPicker`. `random` is deliberately
NOT a registry entry: it has no path of its own, so `STRATEGIES` stays a
total lookup and `PATTERN_NAMES` keeps listing only real generators. The
picker is a closure over `last`, giving a uniform draw that never returns
the same pattern twice in a row. Building CANONICAL_PATTERNS from the
selectable list makes both validation boundaries accept `random` (and
loose spellings) for free, and extends the normalization-collision
assertion to cover the sentinel.
- cli.ts: add `-r`/`--random` plus an exported `selectPattern` holding the
conflict rule. `-r` is sugar for `--pattern random`, so the two agreeing
is a no-op while `-r -p arc` is rejected as contradictory. The flag folds
into `pattern`, so ConfigOverrides, resolveConfig, and move.ts are
untouched. `parseCliArgs` now takes its argv as an optional parameter so
the flag surface is testable without process.argv.
- keeper.ts: resolve `random` via the picker once per trigger, before the
loop-mode branch, so a pick holds for a whole loop run rather than
changing mid-run. runKeeper builds one picker for the process, so the
no-repeat memory spans sweeps minutes apart. Because the pick is a real
strategy, --verbose logs the concrete pattern name and a pick with an
infinite loopPath still bounces edge-to-edge under --loop.
- config.ts / configFile.ts: accept the sentinel where a pattern is valid,
and quote the selectable list in errors. No `random` boolean config key —
the file spells it "pattern": "random".
executor.ts and move.ts needed no changes.
Tests: new tests/cli.test.ts (the file had no coverage before) covering the
flag surface and the conflict rule; picker tests pinning the no-repeat and
full-registry-coverage properties; keeper tests pinning once-per-trigger and
once-per-loop-run.
nokeo08
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