Mobile App Builder
revfactory/harness-100
Full mobile app development pipeline. An agent skill from revfactory/harness-100.
Guides you through comprehensive iOS/Swift app planning and analysis.
Install App Planner
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install gustavscirulis/snapgrid app-planner --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .claude/skills/app-planner && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .claude/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-plannerType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install gustavscirulis/snapgrid app-planner --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .agents/skills/app-planner && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .agents/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install gustavscirulis/snapgrid app-planner --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .cursor/skills/app-planner && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .cursor/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/gustavscirulis/snapgrid.git --path .claude/skills/skills/ios/app-planner--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install gustavscirulis/snapgrid app-planner --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .gemini/skills/app-planner && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .gemini/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install gustavscirulis/snapgrid app-plannerInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .github/skills/app-planner && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .github/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add gustavscirulis/snapgrid --skill app-planner -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install gustavscirulis/snapgrid app-planner --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/skills/ios/app-planner .opencode/skills/app-planner && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "app-planner" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/ios/app-planner into .opencode/skills/app-planner/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-planner", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
app-planner- GitHub stars
- 117
- Used in
- 1 other repo
- Token cost
- ~15k tokens
- SKILL.md length
- 2,104 words
- Files
- 4
- Skills in repo
- 118
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guides you through comprehensive iOS/Swift app planning and analysis.
- Works in 6 steps: Understand Project Context → Load Reference Materials → Planning Phases for New Apps → …
- New apps (concept to architecture)
- SKILL.md covers When This Skill Activates, Planning Process, Planning Tips and References, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
App Planner is an agent skill from gustavscirulis/snapgrid. Guides you through comprehensive iOS/Swift app planning and analysis. Use for new apps (concept to architecture) or existing apps (audit current state, plan improvements, evaluate tech stack). Covers product planning, technical decisions, UI/UX design, and distribution strategy.
Its SKILL.md is about 15k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `architecture-guide.md`, `planning-checklist.md` and `tech-stack-options.md`).
It sits in Mobile, covering iOS development and UI design. It works with iOS. The repository describes itself as: SnapGrid is an open-source Mac app for collecting, organizing, and analyzing UI screenshots. It uses AI to automatically detect UI components and patterns, making it a powerful…
When your agent uses it
- New apps (concept to architecture)
- Existing apps (audit current state
- Plan improvements
- Evaluate tech stack)
Example prompts
- “Use the app-planner skill to guide you through comprehensive iOS/Swift app planning and analysis”
- “/app-planner”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Glob, Grep, AskUserQuestion
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- Understand Project Context
- Load Reference Materials
- Planning Phases for New Apps
- Create Planning Documentation Files
- Provide Recommendations
- Analysis Process for Existing Apps
What it can do on your machine
Read from SKILL.md and the folder at commit eb7eaf4. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteGlobGrepAskUserQuestion
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
developer.apple.comswift.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
App Planner loads about 15k tokens when it runs. Until then it costs about 73 tokens; SKILL.md has 2,104 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 2,104 words (~15,021 tokens).
“Comprehensive guide for planning iOS/Swift applications and analyzing existing apps, covering product, technical, UI/UX, and distribution considerations.”
- name
- app-planner
- allowed-tools
- Read, Write, Glob, Grep, AskUserQuestion
Files
SKILL.md and 3 other files in .claude/skills/skills/ios/app-planner of gustavscirulis/snapgrid.
- SKILL.md
- architecture-guide.md
- planning-checklist.md
- tech-stack-options.md
Open the folder on GitHubat commit eb7eaf4
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in gustavscirulis/snapgrid, which our catalogue first saw on October 7, 2026.
Compare with similar skills
App Planner next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| App Planner this skillgustavscirulis/snapgrid | 117 | 1 repos | ~15k | Automated safety check: Pass | Custom licence | |
| Mobile App Builderrevfactory/harness-100 | 1.3k | — | ~1.8k | Automated safety check: Pass | Apache-2.0 | |
| SwiftUI Design SkillWholiver/swiftui-design-skill | 213 | — | ~2.8k | Automated safety check: Pass | MIT | |
| iOS Hig Design Guidedavepoon/buildwithclaude | 3.6k | — | ~735 | Automated safety check: Pass | MIT | |
| Apple Designvrcm-team/VRCM | 179 | 1 repos | ~6.2k | Automated safety check: Pass | MIT | |
| Swiftui Animation MatchRayFernando1337/rayfernando-skills | 130 | — | ~1.3k | Automated safety check: Pass | Apache-2.0 |
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iOS Hig Design Guide
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Apple Design
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Related
Works with
Categories
Questions about App Planner
What does App Planner do?
Guides you through comprehensive iOS/Swift app planning and analysis. App Planner is an agent skill from gustavscirulis/snapgrid. Guides you through comprehensive iOS/Swift app planning and analysis.
When should I use App Planner?
App Planner fits situations like: new apps (concept to architecture); existing apps (audit current state; plan improvements; evaluate tech stack).
How do I install App Planner in Claude Code?
Run `npx skills add gustavscirulis/snapgrid --skill app-planner -a claude-code`. Or copy the skill folder (.claude/skills/skills/ios/app-planner in gustavscirulis/snapgrid) into .claude/skills/app-planner in your project. Claude Code loads it when a task matches its description.
How do I install App Planner in Codex?
Run `npx skills add gustavscirulis/snapgrid --skill app-planner -a codex`. Or copy the skill folder (.claude/skills/skills/ios/app-planner in gustavscirulis/snapgrid) into .agents/skills/app-planner in your project. Codex loads it when a task matches its description.
Can I use App Planner in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add gustavscirulis/snapgrid --skill app-planner -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/app-planner, .gemini/skills/app-planner, .github/skills/app-planner and .opencode/skills/app-planner in your project.
What does App Planner need to run?
SKILL.md names no scripts, command-line tools or credentials: App Planner is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Glob, Grep, AskUserQuestion.
Does App Planner access the network?
SKILL.md names 2 domains. As links in the text: developer.apple.com and swift.org. This is read from the text; nothing was executed.
Is App Planner safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does App Planner use?
App Planner has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does App Planner use?
About 15k tokens (SKILL.md is roughly 60k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to App Planner?
Skills that share tags, products or a category with App Planner: Mobile App Builder (revfactory/harness-100, 1.3k stars), SwiftUI Design Skill (Wholiver/swiftui-design-skill, 213 stars), iOS Hig Design Guide (davepoon/buildwithclaude, 3.6k stars) and Apple Design (vrcm-team/VRCM, 179 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains App Planner?
gustavscirulis (a GitHub user) maintains it in gustavscirulis/snapgrid, which has 117 GitHub stars. The repository holds 118 skills in this directory. The repository was last updated on April 30, 2026.
Source: gustavscirulis/snapgrid on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.