Backstop v7

Pitch chart + live Gameday feed for MiLB games. One HTML file, zero dependencies. Data saves on-device (localStorage), per game. Live data straight from statsapi.mlb.com.

Run it

• Phone (recommended): push these files to a GitHub repo, enable Pages (main/root), open the URL in Safari, Share -> Add to Home Screen.
• Laptop: open index.html, or python3 -m http.server and hit the LAN IP.
• Updating an existing deploy: just push over it - the service worker version bump forces phones to take the new build. Old charted data carries forward.

v3

• Bottom tab bar, compact game header (tap to switch games), base-out state + live pulse.
• One-screen charting: press-drag fine-tunes location with the marker riding above your finger, crosshair guides, cancel button, tap the velo number to type it, haptics.
• Full roster + handedness hydration: LHP/RHP on pitchers, bats L/R/S on batters, batter side auto-sets (switch hitters flip off the pitcher's hand).
• Contact sheet adds spray direction (pull/middle/oppo).
• Live tab groups pitches by half-inning.
• Card: per-pitcher scout notes print on the PNG; "all" scope aggregates a pitcher across every charted game; CHASE% added.
• Log: export one game or every charted game as CSV (19 columns).
• WEEK constant in index.html sets the schedule window.

v4

• Backup (JSON) / restore in the Log tab - every charted game + notes in one file. Do this after each game; localStorage is not forever.
• Study > counts: pitch mix and strike% by count situation (first pitch, ahead, even, behind, two strikes).
• Study > ump: call accuracy vs your chart - strikes lost, strikes gifted, biggest miss in inches. 1.4" edge grace so borderline calls score as correct.
• Study > spray: field-view spray chart from your contact tags, handedness-aware, colored by quality, HR ringed. Per batter or all.

v5 - the product pass

• Rolling schedule: no more editing a week constant. Always shows yesterday through next week for your tracked teams.
• Settings (gear, top right): pick any teams across AAA / AA / High-A / Single-A; the schedule follows. Night + Day themes (Day is built for sun-blasted bleachers). Haptics toggle. Replay the intro.
• First-run intro: four quick cards, shown once.
• Undo toast: every committed pitch pops a 3.5s toast with one-tap UNDO.
• Offline: if the schedule can't load, your last charted game opens anyway.
• Manifest/PWA polish, "not affiliated with MLB/MiLB" disclaimer in About.

v6 - game-day pass

• Coarse zone mode (Settings): taps snap to 9 honest cells - built for angled seats.
• Due-up line above the zone when live (on deck / in the hole from the feed).
• Pitch-type chips reorder by that pitcher's actual usage; his out-pitch is always a tap away.
• Requests persistent storage from the browser so iOS is less likely to evict your charts.

Deploy at the repo ROOT (fixes the 404)

Upload these six files at the top level of the repo, not inside a folder. Then delete the old backstop-v3 folder and zip. Your URL becomes https://walshja9.github.io/Backstop/ and charted data carries over automatically. Re-add the app to your home screen from the new URL (the old icon points at the old path).

v7 - test-run pass

• Demo game (Settings): a full charted sample - two arms, contact tags, ump misses - so anyone can explore Study/Ump/Card without being at a park. One tap to remove.
• Game card: Card tab now has pitcher card / game card modes. The game card is the postgame share: score, pitches charted, strike%, ump accuracy, hard-hit rate, top velo.
• HP umpire name field on the Ump tab; prints on the game card.
• CSV gains a game_pk column (20 columns) for clean joins against MLB data.
• about.html: a landing page - share https://walshja9.github.io/Backstop/about.html when you start showing people. Cached offline with the app.