phone-gotchas SKILL.md skillA
phone-gotchas from ucsandman/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ucsandman/claude-skills/phone-gotchas@git:20260905.41afbd2Pins git:20260905.41afbd2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ucsandman/claude-skills
- Path
phone-gotchas/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260905.41afbd2, committed Sep 5, 2026
- First version recorded
- Aug 14, 2026
- Size
- 26,085 bytes
- Repository stars
- 5
- License
- MIT
Apply sidetap iPhone guidance before tapping and when taps, scrolls, or sends fail.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Phone Gotchas
## Overview
You do not know the phone. You read it. `ocr()` returns the real accessibility
tree with exact point coordinates, so stop recalling where a control lives and
go look. This skill holds only what reading the screen **cannot** tell you:
harness limits, coordinate traps, and safety gates.
Pairs with the `phone` skill, which covers the helper API.
## Coordinates: never do pixel math
| Source | Units |
|---|---|
| `ocr()`, `find_text()`, `wait_for_text()` | **points** — tap these directly |
| `screenshot()` | **pixels**, 2-3x larger than points |
| `screen_info()` | points, `{width, height, units}` |
Reading a coordinate off a screenshot and tapping it means dividing by a scale
you had to derive. Use `find_text()` instead. Only fall back to screenshot math
for elements that carry no text (color swatches, symbol grids), and compute the
scale as `image_width / screen_info()["width"]`. Never hardcode it.
`ocr()` and `find_text()` return **compacted** results over MCP and declick: actionable
elements only, no `rect`. That is ~62% fewer tokens and the hits you get back
are the ones worth tapping. `ocr(full=True)` returns the raw tree with rects —
…Read the whole file at its exact version.
How to install
mdr add ucsandman/claude-skills/phone-gotchas@sha256:8e67ca3b83520629The line at the top of this page pins the label git:20260905.41afbd2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_hxv5os5fpcrhnr2o)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 14, 2026 and Sep 5, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260905.41afbd2 latest | 2026-09-05 | 41afbd2 | 26,085 B | A | view · diff |
| git:20260904.f164006 | 2026-09-04 | f164006 | 26,138 B | A | view · diff |
| git:20260904.03bac99 | 2026-09-04 | 03bac99 | 25,747 B | A | view · diff |
| git:20260904.14d2e37 | 2026-09-04 | 14d2e37 | 24,641 B | A | view · diff |
| git:20260814.6c29c67 | 2026-08-14 | 6c29c67 | 24,082 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (26085 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ucsandman/claude-skills · 5 stars · license MIT · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hxv5os5fpcrhnr2o GET https://markdownregistry.com/api/v1/resolve?ref=ucsandman/claude-skills/phone-gotchas GET https://markdownregistry.com/api/v1/blob/8e67ca3b8352062990835664b1126011e4c443c4027c994a2b680f29451891e5
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.