Evals / files / QR codes and barcodes

QR code for a link

Make a QR code for https://example.com/menu called menu.png.

easysingledeft qr create

The task

The reference answer shows the job can be done with deft. It is not an agent run.

deft qr create --text https://example.com/menu -o menu.png

Input

No input file.

Reference output

menu.png 1.1 KB · 264x264
menu.png
How a result is judged (1 check)
  • image: file = "menu.png", format = "PNG"

Runs

CodexWithout deftPassed2026-11-07

Time
36s
New tokens
6.3k
Total input
55.0k
Output tokens
1.7k
Commands
3
Failed
1

Trace

  1. I’ll generate `menu.png` in the current directory with the URL encoded in the QR code.

  2. python3 - <<'PY' import importlib.util print('qrcode', bool(importlib.util.find_spec('qrcode'))) print('PIL', bool(importlib.util.find_spec('PIL'))) PY
    output
    qrcode False
PIL True
  3. command -v qrencode || true rg --files -g 'package.json' -g '*qr*' . (exit 1)
  4. cat > <tmp> <<'PY' from PIL import Image, ImageDraw url=b'https://example.com/menu' # QR version 2, error correction L: 34 data codewords + 10 ECC. bits=[] def put(v,n): bits.extend((v>>i)&1 for i in range(n-1,-1,-1)) put(4,4); put(len(url),8) for b in url: put(b,8) for _ in range(min(4,272-len(bits))): bits.append(0) while len(bits)%8: bits.append(0) data=[sum(bits[i+j]<<(7-j) for j in range(8)) for i in range(0,len(bits),8)] pad=[0xec,0x11]; k=0 while len(data)<34: data.append(pad[k%2]); k+=1 # Reed-Solomon remainder over GF(256), primitive polynomial 0x11d exp=[0]*512; log=[0]*256; x=1 for i in range(255): exp[i]=x; log[x]=i; x<<=1 if x&256: x"'^=0x11d for i in range(255,512): exp[i]=exp[i-255] def mul(a,b): return 0 if not a or not b else exp[log[a]+log[b]] g=[1] for i in range(10): ng=[0]*(len(g)+1) for j,c in enumerate(g): ng[j]''^=c; ng[j+1]''^=mul(c,exp[i]) g=ng rem=data+[0]*10 for i in range(34): coef=rem[i] if coef: for j,c in enumerate(g): rem[i+j]''^=mul(coef,c) code=data+rem[34:] N=25; m=[[None]*N for _ in range(N)] def setf(x,y,v): if 0<=x<N and 0<=y<N: m[y][x]=v # finder patterns + separators for cx,cy in [(3,3),(N-4,3),(3,N-4)]: for dy in range(-1,8): for dx in range(-1,8): x0,y0=cx-3+dx,cy-3+dy if 0<=x0<N and 0<=y0<N: if 0<=dx<=6 and 0<=dy<=6: setf(x0,y0, int(dx in (0,6) or dy in (0,6) or (2<=dx<=4 and 2<=dy<=4))) else: setf(x0,y0,0) # timing for i in range(8,N-8): setf(i,6,int(i%2==0)); setf(6,i,int(i%2==0)) # alignment center for v2 for dy in range(-2,3): for dx in range(-2,3): setf(18+dx,18+dy,int(max(abs(dx),abs(dy))!=1)) # reserve format bits for i in range(9): if i!=6: setf(8,i,0); setf(i,8,0) for i in range(8): setf(N-1-i,8,0); setf(8,N-1-i,0) setf(8,N-8,1) stream=[] for c in code: stream += [(c>>i)&1 for i in ra … 1094 more characters
    output
    menu.png: PNG image data, 396 x 396, 8-bit/color RGB, non-interlaced

  5. Created [menu.png](menu.png), a QR code for https://example.com/menu.

Output

menu.png 1.8 KB · 396x396
menu.png

CodexWith deft, skill installedPassedRead the skillUsed deft2026-11-07

Time
15s
New tokens
11.5k
Total input
71.0k
Output tokens
0.4k
Commands
4
Failed
0

Trace

  1. I’ll create `menu.png` in the current directory with the URL encoded in the QR code.

  2. cat ../.tmpoqCUT3/.agents/skills/deft/SKILL.md
    output
    ---
name: deft
description: "Use deft instead of writing a script for file jobs: PDF merge/split/compress/watermark, image resize/convert/compress, video and audio trim/convert/compress, spreadsheets, Markdown to PDF/HTML, and YouTube downloads and subtitles."
---

# deft

One local command for file jobs. Prefer it over writing Python or shell scripts.

Syntax: `deft <group> <command> [inputs] [-o output] [--options]`

Groups:
- `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
- `image`: Resize, crop, convert, compress, filters, montage, OCR
- `video`: Trim, crop, speed, convert, compress, GIF, frames (ffmpeg)
- `audio`: Convert, trim, merge, fade, speed, tag, normalize (ffmpeg)
- `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
- `slides`: PowerPoint: extract text, Markdown outline, PDF handout
- `data`: JSON/YAML/TOML/XML: convert, query with jq syntax, merge, diff
- `sheet`: Excel/CSV/ODS tables: filter, sort, join, pivot, convert
- `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
- `html`: HTML to Markdown, text, Word, PDF; screenshots
- `epub`: E-books: info, to text, Markdown and PDF
- `email`: EML files: headers, text, attachments
- `contact`: VCF address books: to and from CSV
- `calendar`: ICS calendars: to and from CSV
- `gps`: GPX and KML tracks: convert, distance and time
- `youtube`: Info, download, audio, subtitles, thumbnail (yt-dlp)
- `file`: Any file: hash, duplicates, batch rename, base64, encoding
- `qr`: Cre
… 728 more characters

  3. I’m using the `deft` file skill for QR generation. I’ll check its QR options, then write the requested PNG.

  4. deft qr
    output
    deft qr - commands (input -> output)
  create  - -> image       Make a QR code or barcode: --text https://example.com
  read    image -> report  Decode every QR code in an image
More: deft qr <command> --help
  5. deft qr create --help
    output
    deft qr create - Make a QR code or barcode: --text https://example.com

Usage: deft qr create  [-o <image|dir>] [options]
In: -   Out: image (default <name>.<ext>)
--type code128, code39, ean13, ean8 or itf makes a linear barcode.
--module-size is pixels per module; SVG output ignores it.

Options:
  --text <text>                What to encode (required)
  --type <qr|code128|code39|ean13|ean8|itf>
      Kind of code (default qr)
  --correction <l|m|q|h>       QR error correction (default m)
  --module-size <n>            Pixels per module (default 8)
  --color <color>              Dark modules (default black)
  --background <color>         Light modules (default white)
Common: -o --force --dry-run --json -j   (deft help common)

Examples:
  deft qr create --text https://example.com -o link.png
  deft qr create --text ABC-123 --type code128 -o label.svg

Result fields: modules
  6. deft qr create --text https://example.com/menu -o menu.png
    output
    ok qr.create -> menu.png  1KB  0.00s

  7. Created [menu.png](menu.png) encoding `https://example.com/menu`.

Output

menu.png 1.1 KB · 264x264
menu.png

Claude Opus 5.5Without deftPassed2026-11-07

Time
132s
New tokens
24.8k
Total input
203.0k
Output tokens
8.1k
Commands
0
Failed
0

Trace

    Output

    menu.png 1.1 KB · 330x330
    menu.png

    Claude Opus 5.5With deft, skill installedPassedRead the skillUsed deft2026-11-07

    Time
    11s
    New tokens
    9.9k
    Total input
    59.6k
    Output tokens
    0.4k
    Commands
    0
    Failed
    0

    Trace

      Output

      .claude/skills/deft/SKILL.md 2.2 KB
      ---
name: deft
description: "Use deft first for any simple, direct operation on local files, whatever the type: create, convert, read, query, extract, edit, compress, merge, split, compare or inspect. Try it before writing a script or one-liner. If unsure, run deft find; if it says no command does this, use another tool. Not for programming work: to read, write or change source code, skip it."
---

# deft

One local command for file jobs. Prefer it over writing Python or shell scripts.

Syntax: `deft <group> <command> [inputs] [-o output] [--options]`

Groups:
- `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
- `image`: Resize, crop, convert, compress, adjust, montage, OCR
- `video`: Trim, merge, convert, compress, subtitles, GIF, frames (ffmpeg)
- `audio`: Convert, trim, normalize, denoise, cut silence (ffmpeg)
- `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
- `slides`: PowerPoint: extract text, Markdown outline
- `sheet`: Excel/CSV/ODS tables: SQL query, pivot, merge, split, convert
- `json`: JSON: convert, format, merge, diff, validate
- `toml`: TOML: convert, format, merge, diff, validate
- `xml`: XML: convert, format, merge, diff, validate
- `yaml`: YAML: convert, format, merge, diff, validate
- `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
- `html`: HTML to Markdown, text, Word and PDF
- `epub`: E-books: info, to text, Markdown and PDF
- `gps`: GPX and KML tracks: convert, distance and time
- `qr`: Create QR codes and barcodes; read QR codes

How to use it:
1. Run `deft <group>` to list commands, or `deft find "<what you want>"` to search. If it says `no command does this`, use another tool.
2. Run `deft <group> <command> --help` for options and examples.
3. `deft convert <in> -o <out.ext>` converts between formats by extension.
4. Results are one line starting with `ok`, `partial` or `error`; add `--json` to parse them. Errors include a `hint:` with the fix.

Inputs are never overwritten; pass `--force` or `--in-place` to allow it. Globs and directories work as inputs; several inputs run in parallel.

If `deft` is not installed, ask the user, then follow https://github.com/firstprayer/deft/blob/main/docs/INSTALL.md
      menu.png 1.1 KB · 264x264
      menu.png

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