# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project

**morningedition** — prints a daily morning "newspaper" receipt on an Epson TM-T88V thermal printer
at 6:30am via cron. One Python script, no dependencies beyond stdlib.

## Printer

- **Model:** Epson TM-T88V (M244A), USB, 80mm paper rolls
- **CUPS name:** `receipt`
- **Print command:** `lpr -P receipt -o raw` — raw ESC/POS, do not use CUPS rendering mode
- **Paper cut:** `GS V 0x00` ESC/POS byte in the output stream
- **ASCII only** — no emoji, no unicode; use `.encode("ascii", errors="replace")`
- **Current WIDTH = 30** — printer NV is locked to 58mm mode; fix via Epson TM Utility
  (Windows) then set WIDTH = 42. Do not change WIDTH without fixing the printer first.

## Architecture

`morningedition.py` is a single self-contained script:

1. Fetches weather from `wttr.in/{zipcode}?format=j1` (JSON)
2. Fetches RSS headlines from ABC13 and BBC
3. Builds a receipt as a list of ASCII text lines
4. Wraps lines in ESC/POS framing bytes (`INIT + FONT_A + body + CUT`)
5. Pipes raw bytes to `lpr -P receipt -o raw`

The `--preview` flag dumps the text portion to stdout instead of printing.

## Key constants (morningedition.py)

| Constant | Value | Notes |
|---|---|---|
| `WIDTH` | 30 | chars per line; change to 42 after fixing printer NV |
| `PRINTER` | `"receipt"` | CUPS printer name |
| `ZIPCODE` | `"77433"` | Bridgeland, Cypress TX |
| `NAME` | `"Rich"` | used in greeting |

## Content rotation

Quotes, jokes, facts, and local tips rotate by `day_of_year % len(list)` — no state file needed.

## What to avoid

- Do not use `lpr -o TmxPaperCut=CutPerJob` — CUPS mode renders at huge font size
- Do not use emoji or unicode characters anywhere in output
- Do not add external dependencies; stdlib only
- NHL API (`api-web.nhle.com`) returns 403 — do not use
- `investing.com` scraping is unreliable — do not use