Algo Changelog

This is the signal-board changelog for StockArithm.

It tracks changes to the algo inventory itself:

• added algos
• renamed algos
• retired algos
• metadata or display changes that affect how a signal appears on the public board

It is not the place for site copy, content-system, or workflow changes. Those belong in `PUBLIC_CHANGELOG.md`.

Entry Rules

• Log batch additions when they materially change board size or coverage.
• Log renames that affect public display.
• Log retirements, graveyard moves, or major status changes.
• Log large metadata backfills when they change how the board is read.
• Do not log every nightly stat change.

2026-05-24

Added

• Latest daily signal batch brought the public board to `344` live signals across `105` tickers.

Metadata

• Backfilled plain-English descriptions for older signals so existing algo detail pages now explain the signal intent in readable language.

2026-05-20

Hygiene

• Removed duplicate algo IDs from the force-rank and rolling-30D layers so every public row now maps to a unique signal identity.

Renamed

• Duplicate visible names now use explicit `alt` suffixes instead of silently sharing the same public label.
• Example: duplicate Biscotti variants now render with distinct labels instead of appearing as the same signal twice.

2026-05-19

Added

• Public board expanded to `292` generated signals across `105` tickers.

2026-05-18

Added

• Public board held at `278` generated signals across `105` tickers while the rolling board continued to track `279` live rows.

2026-05-15

Added

• Public board reached `278` generated signals across `105` tickers.

Metadata

• Daily content and launch-copy layers were generated against the live board so the early launch surfaces reflected the actual signal population instead of stale placeholder numbers.

Operating Format

Use this structure for future entries:

## YYYY-MM-DD

### Added
- Signal family or batch summary.

### Renamed
- Old visible name -> new visible name.

### Retired
- Signal name and short reason.

### Metadata
- Public-facing description/status/family changes.