matlab-build-app

matlab/matlab-agentic-toolkit Product & project management

matlab-build-app is a skill in matlab/matlab-agentic-toolkit, last changed 8 Oct 2026. It can run shell commands, reach the network, name web addresses, bundle scripts, pre-approve tools and include files we can't read — read the findings before installing.

From the author

Build MATLAB apps from requirements to working code. Asks discovery questions (or skips them when the path is known), recommends UIFigure or UIHTML architecture, identifies layout archetype (Dashboard, Explorer, Tabbed, Wizard, Canvas), produces an implementation plan, and executes the build. For UIFigure apps, optionally serializes as App Designer (.mlapp or plain-text .m + .xml). Use when a user wants to build a MATLAB app, create a GUI, make an interactive tool, build a uifigure app, build a uihtml app, build an App Designer app, build a .mlapp app, build a plain-text App Designer app, or asks which approach to use. Also use when user describes spatial layout needs: dashboard, control panel, sidebar, tabs, wizard, stepper, canvas, workspace.

How much a skill can do, not whether it is risky.

Pattern check

5 items to review

Broad tools pre-approved in allowed-tools

R34 · High · SKILL.md:20 and 4 more

Commit 032b4b6 · 29 Oct 2026

How the check works

Pattern check:5 items to reviewSee them

Install

Each tab says whether it installs commit 032b4b6, the one we checked, or the latest version.

OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. matlab/matlab-agentic-toolkit/skills-catalog/matlab-app-building/matlab-build-app (opens in a new tab)

Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.

Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie and Amp. With This project, Any agent also reaches Antigravity and Claude Code reaches Cline. Kiro needs the folder copied by hand.

Read these 5 items before installing, starting with Broad tools pre-approved in allowed-tools — SKILL.md:20

Pinned to commit 032b4b6, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .claude/skills &&mkdir .claude/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .claude/skills/matlab-build-app/ &&rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Or install the matlab-app-building plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.

claude plugin marketplace add matlab/matlab-agentic-toolkit --scope project &&claude plugin install matlab-app-building@matlab-agentic-toolkit --scope project

Claude Code docs

Pinned to commit 032b4b6, the one we checked.

Skills in the Claude apps belong to your account rather than to a project.

Make matlab-build-app.zip, with the skill folder at the top level:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&out="$(mktemp -d)" &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app "$out"/matlab-build-app &&(cd "$out" && zip -qr - matlab-build-app) > matlab-build-app.zip &&rm -rf "$tmp" "$out"

In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose matlab-build-app.zip.

On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.

Claude apps docs

Pinned to commit 032b4b6, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .agents/skills &&mkdir .agents/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .agents/skills/matlab-build-app/ &&rm -rf "$tmp"

Codex picks up new skills on its own; restart it if this one does not appear.

Codex docs

Pinned to commit 032b4b6, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .cursor/skills &&mkdir .cursor/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .cursor/skills/matlab-build-app/ &&rm -rf "$tmp"

Cursor docs

Pinned to commit 032b4b6, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .github/skills &&mkdir .github/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .github/skills/matlab-build-app/ &&rm -rf "$tmp"

In a running Copilot CLI session, run /skills reload.

Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.

gh skill install matlab/matlab-agentic-toolkit skills-catalog/matlab-app-building/matlab-build-app/SKILL.md@032b4b605999b1f4adecaac1efa1c9faad41adf6 --agent github-copilot --scope project

Copilot & VS Code docs

Pinned to commit 032b4b6, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .gemini/skills &&mkdir .gemini/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .gemini/skills/matlab-build-app/ &&rm -rf "$tmp"

In a running session, run /skills reload.

Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.

gemini skills install https://github.com/matlab/matlab-agentic-toolkit.git --path skills-catalog/matlab-app-building/matlab-build-app --scope workspace

Gemini CLI docs

Pinned to commit 032b4b6, the one we checked.

OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/matlab/matlab-agentic-toolkit.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&git -C "$tmp" sparse-checkout set -- skills-catalog/matlab-app-building/matlab-build-app &&git -C "$tmp" checkout -q 032b4b605999b1f4adecaac1efa1c9faad41adf6 &&mkdir -p .agents/skills &&mkdir .agents/skills/matlab-build-app &&cp -R "$tmp"/skills-catalog/matlab-app-building/matlab-build-app/. .agents/skills/matlab-build-app/ &&rm -rf "$tmp"

Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.

npx skills@1.7.4 add matlab/matlab-agentic-toolkit --skill matlab-build-app

Agent Skills docs

Read SKILL.md first

Licence not identified

Licence

1.2k

Repo stars

Folder last changed

Publisher

Files

Checked

29 Oct 2026

What it can touch

From the files and frontmatter at commit 032b4b6. This is how much a skill can do, not whether it is risky.

Runs shell commands
Its instructions or files give the agent commands to run on your computer.
Reaches the network
It sends or fetches data over the internet, for example with curl, an HTTP library or a package install.
Names web addresses
It mentions outside web addresses the agent may visit. We list them but don't follow them.
Outside links we did not follow
Bundles scripts
The folder holds code files the agent may run.
assets/minimal-bridge.m (opens in a new tab) · scripts/+module/+backgroundtask/templates/cancelBackground.m (opens in a new tab) · scripts/+module/+backgroundtask/templates/handleBackgroundComplete.m (opens in a new tab) and 2 more
Pre-approves tools
Its allowed-tools field lists tools the agent may use without asking you first, in agents that honour it.
SKILL.md:20 (opens in a new tab)
Includes files we can't read
It ships binaries, archives or documents whose contents this check cannot look inside.
references/background-tasks.md:125 (opens in a new tab) · scripts/AppDesignerAgentInterface.p (opens in a new tab) · scripts/MlappBackend.p (opens in a new tab) and 1 more

Pattern check

Pattern check: 5 items to review · commit 032b4b6 · 29 Oct 2026

R34 · HighBroad tools pre-approved in allowed-tools
SKILL.md:20 (opens in a new tab)
```
- Write
```
R32 · HighBinary, compiled, archived or document file
references/background-tasks.md:125 (opens in a new tab)
```
`AppBuilderModule.p` and `BackgroundTaskModule.p` are internal implementation
```
R32 · HighBinary, compiled, archived or document file
scripts/AppDesignerAgentInterface.p (opens in a new tab)
R32 · HighBinary, compiled, archived or document file
scripts/MlappBackend.p (opens in a new tab)
R32 · HighBinary, compiled, archived or document file
scripts/PlainTextBackend.p (opens in a new tab)

We checked every text file in this skill, at commit 032b4b6 on 29 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check works Report an incorrect finding

Files we didn't read

scripts/+module/+backgroundtask/BackgroundTaskModule.p · binary file
scripts/+module/AppBuilderModule.p · binary file
scripts/AppDesignerAgentInterface.p · binary file
scripts/MlappBackend.p · binary file
scripts/PlainTextBackend.p · binary file

Outside links we did not follow

https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.md
https://cdn.jsdelivr.net/npm/chart.js@4.5.1/dist/chart.umd.min.js
https://cdn
http://www.w3.org/2001/XMLSchema
https://cdn.jsdelivr.net/npm/chartjs-adapter-date-fns@3.0.0/dist/chartjs-adapter-date-fns.bundle.min.js

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

Agent Skills specPasses with warnings
The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.
- Warning
  allowed-tools is a list; the spec defines a space-separated string. gh skill publish rejects a list, though Claude Code accepts one. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Bash Grep Glob
- Warning
  The body is about 5,031 tokens (approx.); the spec suggests under 5,000. B2
  Fix: Move detail into reference files that the agent reads only when needed.
- Note
  Reference files over 100 lines with no table of contents at the top: references/app-designer/agent-guide-mlapp.md (327 lines), references/app-designer/agent-guide-plaintext.md (300 lines), references/app-designer/agent-guide-shared.md (540 lines), references/app-designer/background-tasks.md (109 lines), references/app-designer/plaintext/classdef-template.md (356 lines) and 34 more. B5
  Fix: Add a short list of the sections at the top of each.
Claude CodePasses
Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.
- Note
  The body is about 5,031 tokens (approx.); the spec suggests under 5,000. After compaction Claude Code keeps only the first 5,000 tokens of a skill. B2
  Fix: Move detail into reference files that the agent reads only when needed.
- Note
  Reference files over 100 lines with no table of contents at the top: references/app-designer/agent-guide-mlapp.md (327 lines), references/app-designer/agent-guide-plaintext.md (300 lines), references/app-designer/agent-guide-shared.md (540 lines), references/app-designer/background-tasks.md (109 lines), references/app-designer/plaintext/classdef-template.md (356 lines) and 34 more. B5
  Fix: Add a short list of the sections at the top of each.
Claude apps & API uploadPasses
Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.
- Note
  The description is 754 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4
  Fix: If the claude.ai upload refuses it, trim the description to 200 characters.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Bash Grep Glob
- Note
  The body is about 5,031 tokens (approx.); the spec suggests under 5,000. Anthropic's guidance says the same. B2
  Fix: Move detail into reference files that the agent reads only when needed.
- Note
  Reference files over 100 lines with no table of contents at the top: references/app-designer/agent-guide-mlapp.md (327 lines), references/app-designer/agent-guide-plaintext.md (300 lines), references/app-designer/agent-guide-shared.md (540 lines), references/app-designer/background-tasks.md (109 lines), references/app-designer/plaintext/classdef-template.md (356 lines) and 34 more. B5
  Fix: Add a short list of the sections at the top of each.
OpenAI (Codex & API)Passes
Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Bash Grep Glob
VS Code & CopilotPasses
VS Code reads skills one folder below .github/skills, .claude/skills or .agents/skills and falls back to the folder name when the name is missing or differs; GitHub's Copilot docs require the exact name SKILL.md.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Bash Grep Glob

SKILL.md

We only show SKILL.md text here when its licence clearly allows it.

Read SKILL.md on GitHub

Files

66 files

Path	Size
SKILL.md (opens in a new tab)	20.9 KB
assets/colors_and_type.css (opens in a new tab)	12.8 KB
assets/minimal-bridge.html (opens in a new tab)	1.3 KB
assets/minimal-bridge.m (opens in a new tab)	1.2 KB
assets/standalone-chart-template.html (opens in a new tab)	11.5 KB
manifest.yaml (opens in a new tab)	672 B
references/app-designer/agent-guide-mlapp.md (opens in a new tab)	15.7 KB
references/app-designer/agent-guide-plaintext.md (opens in a new tab)	14.7 KB
references/app-designer/agent-guide-shared.md (opens in a new tab)	27.1 KB
references/app-designer/background-tasks.md (opens in a new tab)	4.8 KB
references/app-designer/plaintext/classdef-template.md (opens in a new tab)	11.3 KB
references/app-designer/plaintext/matlabAppSchema.xsd (opens in a new tab)	16.8 KB
references/app-designer/plaintext/property-reference.md (opens in a new tab)	45.1 KB
references/app-designer/plaintext/xml-template.md (opens in a new tab)	12.3 KB
references/archetypes/canvas.md (opens in a new tab)	8 KB
references/archetypes/dashboard.md (opens in a new tab)	6.4 KB
references/archetypes/explorer.md (opens in a new tab)	5.7 KB
references/archetypes/tabbed.md (opens in a new tab)	6.6 KB
references/archetypes/wizard.md (opens in a new tab)	9.7 KB
references/background-tasks.md (opens in a new tab)	6.9 KB

Show 46 more

Path	Size
references/editing-guide.md (opens in a new tab)	3.3 KB
references/timers.md (opens in a new tab)	2.1 KB
references/uifigure/callbacks.md (opens in a new tab)	3 KB
references/uifigure/components.md (opens in a new tab)	1.7 KB
references/uifigure/containers.md (opens in a new tab)	1.3 KB
references/uifigure/grid-layout.md (opens in a new tab)	4.9 KB
references/uifigure/guide.md (opens in a new tab)	5.3 KB
references/uifigure/layout-patterns.md (opens in a new tab)	1.5 KB
references/uifigure/mvvm-background-tasks.md (opens in a new tab)	3.9 KB
references/uifigure/mvvm-guide.md (opens in a new tab)	11.1 KB
references/uifigure/mvvm-testing.md (opens in a new tab)	2.8 KB
references/uifigure/mvvm-view-binding.md (opens in a new tab)	5.4 KB
references/uihtml/brand-design-tokens.md (opens in a new tab)	5.6 KB
references/uihtml/bridge-guide.md (opens in a new tab)	7 KB
references/uihtml/chart-bridge-integration.md (opens in a new tab)	7.5 KB
references/uihtml/chart-performance.md (opens in a new tab)	5 KB
references/uihtml/chart-type-selection.md (opens in a new tab)	3.1 KB
references/uihtml/chart-updates.md (opens in a new tab)	4.7 KB
references/uihtml/charting-guide.md (opens in a new tab)	3.9 KB
references/uihtml/chartjs-setup.md (opens in a new tab)	4 KB
references/uihtml/communication-patterns.md (opens in a new tab)	4.2 KB
references/uihtml/component-styles.md (opens in a new tab)	4.3 KB
references/uihtml/css-layout-patterns.md (opens in a new tab)	5 KB
references/uihtml/dark-mode.md (opens in a new tab)	3.8 KB
references/uihtml/data-types.md (opens in a new tab)	2.7 KB
references/uihtml/doughnut-scatter-charts.md (opens in a new tab)	6 KB
references/uihtml/error-handling.md (opens in a new tab)	4.6 KB
references/uihtml/external-color-schemes.md (opens in a new tab)	2.6 KB
references/uihtml/js-coding-guide.md (opens in a new tab)	11.2 KB
references/uihtml/js-testing-debugging.md (opens in a new tab)	2.9 KB
references/uihtml/line-bar-charts.md (opens in a new tab)	5.2 KB
references/uihtml/mvvm-guide.md (opens in a new tab)	11 KB
references/uihtml/mvvm-observable-classes.md (opens in a new tab)	2.9 KB
references/uihtml/mvvm-view-binding.md (opens in a new tab)	5.3 KB
references/uihtml/platform-limitations.md (opens in a new tab)	2.5 KB
references/uihtml/setup.md (opens in a new tab)	3.9 KB
references/uihtml/styling-guide.md (opens in a new tab)	8.1 KB
scripts/+module/+backgroundtask/BackgroundTaskModule.p (opens in a new tab)	2.5 KB
scripts/+module/+backgroundtask/templates/cancelBackground.m (opens in a new tab)	357 B
scripts/+module/+backgroundtask/templates/handleBackgroundComplete.m (opens in a new tab)	1.4 KB
scripts/+module/+backgroundtask/templates/safeProgress.m (opens in a new tab)	734 B
scripts/+module/+backgroundtask/templates/startBackground.m (opens in a new tab)	1.2 KB
scripts/+module/AppBuilderModule.p (opens in a new tab)	242 B
scripts/AppDesignerAgentInterface.p (opens in a new tab)	12.6 KB
scripts/MlappBackend.p (opens in a new tab)	9.4 KB
scripts/PlainTextBackend.p (opens in a new tab)	10.2 KB

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All skills in matlab/matlab-agentic-toolkit

Other Product & project management skills

Same category, most repo stars first.

Skill	What it can touch	Pattern check	Licence	Updated
executing-plansUse when executing an implementation plan in the current session as the implementer yourself — your human partner chose inline execution, or no subagent tool is available obra/superpowers Runs shell commands +1 more Pattern check: Nothing flaggedMITUpdated 21 Oct 2026	Runs shell commands Bundles scripts	Pattern check: Nothing flagged	MIT	21 Oct 2026
writing-plansUse when you have a spec or requirements for a multi-step task, before touching code obra/superpowers Instructions only Pattern check: Nothing flaggedMITUpdated 25 Sept 2026	Instructions only	Pattern check: Nothing flagged	MIT	25 Sept 2026
blueprintTurn a one-line objective into a step-by-step construction plan for multi-session, multi-agent engineering projects: one-PR-sized steps with self-contained context briefs, dependency graph with parallel-step detection, adversarial review gate, and plan mutation protocol. Use when planning a large feature, refactor, or roadmap that spans multiple PRs or sessions; not for single-PR tasks or when the user says "just do it". affaan-m/ECC Changes agent settings +2 more Pattern check: Nothing flaggedMITUpdated 1 Oct 2026	Changes agent settings Runs shell commands +1 more	Pattern check: Nothing flagged	MIT	1 Oct 2026
brownfield-retrospectiveRun the ECC engineering process retroactively against an existing project slice. Audit current state, reconstruct past decisions, produce a four-axis gap register (thinking, coding practice, missing features, technology selection), then execute fixes forward through the plan-TDD-review pipeline. Use when adopting ECC mid-project, taking over an inherited codebase, or asking what was missed and what would have been built differently from day one. affaan-m/ECC Runs shell commands Pattern check: Nothing flaggedMITUpdated 10 Oct 2026	Runs shell commands	Pattern check: Nothing flagged	MIT	10 Oct 2026
discernment-nudgeAfter you give a substantive answer or draft that the user may act on — advice or recommendations, drafted artifacts such as goals, plans, pitches, proposals, or emails, estimates or projections, analysis or interpretation of data, factual claims they may rely on, or a multi-step argument — invoke this skill BEFORE finalizing your reply and then, if it applies, append 2-3 short follow-up questions, each tied to something specific in what you just produced, that help the user check key facts, probe the reasoning or assumptions, and notice missing context. Do this at most once per conversation. Skip it when the user asked a trivial how-to or simple lookup, wants a purely educational explanation, asked you only to format, convert, or assemble a file from content they provided, is writing code they will run, is doing creative writing or casual chat, or already asked you to double-check, cite, or review — the skill file explains these boundaries and the exact output format. anthropics/skills Names web addresses Pattern check: Nothing flaggedApache 2.0Updated 17 Aug 2026	Names web addresses	Pattern check: Nothing flagged	Apache 2.0	17 Aug 2026
eval-planPreregister a paid eval (bars, arms, decoys, stop rules), dry-run it at zero cost, then run a three-item priced pilot whose spend table gates approval. (gstack) garrytan/gstack Runs shell commands +1 more Pattern check: 1 item to reviewMITUpdated 27 Oct 2026	Runs shell commands Pre-approves tools	Pattern check: 1 item to review	MIT	27 Oct 2026

At a glance

What it can touch

Pattern check

Install

Claude Code

Claude apps

Codex

Cursor

Copilot & VS Code

Gemini CLI

Any agent

What it can touch

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Files we didn't read

Outside links we did not follow

Format check

SKILL.md

Files

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