Official agent skill

Add PDF Viewer

by microsoft in microsoft/power-platform-skills

Internal implementation skill invoked by /add-native for native PDF control workflows.

OfficialMITAuto-check: notesDocuments & Office

Install Add PDF Viewer

skills CLI
$ npx skills add microsoft/power-platform-skills --skill add-pdf-viewer -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install microsoft/power-platform-skills add-pdf-viewer --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/microsoft/power-platform-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/mobile-apps/skills/add-native/add-pdf-viewer .claude/skills/add-pdf-viewer && rm -rf skills-src

Use ~/.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/

Facts

Skill name
add-pdf-viewer
GitHub stars
967
Token cost
~1.8k tokens
SKILL.md length
434 words
Files
1
Skills in repo
87
Repo updated
First seen
Licence
MIT

At a glance

Internal implementation skill invoked by /add-native for native PDF control workflows.

  • Works in 8 steps: Verify app → Verify package is already present → Write or verify src/native/pdfViewer.ts → …
  • Tasks that involve PDF
  • Calls npx, node and npm

What it does

Add PDF Viewer is an agent skill from microsoft/power-platform-skills, published by the product's own GitHub organization. Internal implementation skill invoked by /add-native for native PDF control workflows. Handles HTTPS and file URI PDF viewing with @microsoft/power-apps-native-pdf-viewer 0.2.9+.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Documents & Office, covering PDF. It works with Expo. The repository describes itself as: A plugin marketplace for GitHub Copilot and other AI agents that provides Power Platform development plugins, including reusable skills, agents, and commands for building and… The licence is MIT.

When your agent uses it

  • Tasks that involve PDF

Example prompts

  • “/add-pdf-viewer”

Requirements

  • Node.js
  • Pre-approved tools (allowed-tools): Read, Edit, Write, Grep, Glob, Bash, AskUserQuestion

Workflow steps

8 steps, taken from the step headings in SKILL.md.

  1. Verify app
  2. Verify package is already present
  3. Write or verify src/native/pdfViewer.ts
  4. Use the wrapper
  5. Type-check
  6. Native rebuild note
  7. Do not use HostingSDK / PCF
  8. Summary

What it can do on your machine

Read from SKILL.md and the folder at commit 5ef4e4f. 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:

    • Read
    • Edit
    • Write
    • Grep
    • Glob
    • Bash
    • AskUserQuestion

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx
    • node
    • npm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx and npm, which can reach the network depending on how they are called.

    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

Add PDF Viewer loads about 1.8k tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 434 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~48
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Edit, Write, Grep, Glob, Bash, AskUserQuestion

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

The full file from microsoft/power-platform-skills at commit 5ef4e4f, republished under its MIT licence (© microsoft). 434 words, ~1,775 tokens.

Download SKILL.mdSave it as .claude/skills/add-pdf-viewer/SKILL.md (or your agent's skills folder).
name
add-pdf-viewer
description
Internal implementation skill invoked by /add-native for native PDF control workflows. Handles HTTPS and file URI PDF viewing with @microsoft/power-apps-native-pdf-viewer 0.2.9+.
allowed-tools
Read, Edit, Write, Grep, Glob, Bash, AskUserQuestion
user-invocable
false
disable-model-invocation
true
model
sonnet

📋 Shared instructions: shared-instructions.md — read first.

Add PDF Viewer

Internal helper. Users should invoke /add-native pdf-viewer, /add-native pdf-control, or /add-native @microsoft/power-apps-native-pdf-viewer; /add-native routes here after resolving the capability.

Generate or verify the native PDF viewer wrapper and show how to call its native React Native API. Version 0.2.9 and later support HTTPS PDF URLs and local file:// URIs. Do not use the HostingSDK / PCF path from the package README; that is for a different use case.

Steps

1. Verify app
bash
test -f app.config.js && test -f power.config.json && test -f package.json && test -d src

If this fails, tell the user to run /create-mobile-app first and STOP.

2. Verify package is already present
bash
node -e "const p=require('./package.json'); const m='@microsoft/power-apps-native-pdf-viewer'; if (!p.dependencies?.[m]) { console.error('MISSING: ' + m + ' is not in package.json. The template/app must already ship this native extension. This skill will not install it or edit native config.'); process.exit(1); } let v; try { v=require('./node_modules/' + m + '/package.json').version; } catch { console.error('MISSING_INSTALL: cannot verify the installed ' + m + ' version. Run the project package install first.'); process.exit(1); } const [major,minor,patch]=v.split('.').map(Number); if (!(major > 0 || minor > 2 || (minor === 2 && patch >= 9))) { console.error('UNSUPPORTED_VERSION: ' + m + ' ' + v + ' does not support file:// URIs. Version 0.2.9+ is required.'); process.exit(1); } console.log('OK: native PDF viewer ' + v + ' supports https:// and file://');"

If the check fails, STOP. Do not run npm install, npx expo install, pod install, or edit app.config.js. Version 0.2.9+ must already be part of the app's native build.

3. Write or verify src/native/pdfViewer.ts

Create src/native/pdfViewer.ts if it does not exist. If it already exists, inspect it and patch only if it violates the supported URI rules or throws instead of returning a result.

The wrapper MUST:

  • Accept https:// URLs and file:// URIs.
  • Reject content://, blob:, http://, empty, and malformed URLs before calling native code.
  • Return a discriminated union and never throw.
  • Return NATIVE_MODULE_MISSING when the extension is installed in JS but unavailable in the native build.
  • Surface viewer action results (shared, printed, dismissed) when available.
  • Return VIEWER_FAILED for native errors not covered by validation/module checks.
ts
// src/native/pdfViewer.ts
import { NativePdfViewer } from '@microsoft/power-apps-native-pdf-viewer';

export type PdfViewerResult =
  | { ok: true; action?: 'shared' | 'printed' | 'dismissed' }
  | { ok: false; reason: 'INVALID_URL' | 'NATIVE_MODULE_MISSING' | 'VIEWER_FAILED'; message?: string };

export async function openHttpsPdf(
  url: string,
  options?: { title?: string; maxFileSizeMb?: number; cacheEnabled?: boolean },
): Promise<PdfViewerResult> {
  let parsed: URL;
  try {
    parsed = new URL(url);
  } catch {
    return { ok: false, reason: 'INVALID_URL', message: 'PDF location must be a valid https:// URL or file:// URI.' };
  }

  const isHttpsUrl = parsed.protocol === 'https:';
  const isFileUri = parsed.protocol === 'file:' && url.startsWith('file://') && parsed.pathname !== '/';
  if (!isHttpsUrl && !isFileUri) {
    return { ok: false, reason: 'INVALID_URL', message: 'Native PDF viewer supports https:// and file:// inputs only.' };
  }

  if (!NativePdfViewer?.openPdf) {
    return { ok: false, reason: 'NATIVE_MODULE_MISSING', message: 'Native PDF viewer module is not available in this build.' };
  }

  try {
    const response = await NativePdfViewer.openPdf(url, {
      maxFileSizeMb: 50,
      cacheEnabled: true,
      ...options,
    });

    if (response.status === 'ok') {
      return { ok: true, action: response.result?.action };
    }

    return { ok: false, reason: 'VIEWER_FAILED', message: response.message ?? response.error };
  } catch (error: any) {
    return { ok: false, reason: 'VIEWER_FAILED', message: error?.message ?? String(error) };
  }
}
Show full SKILL.md (211 more words)Show less
4. Use the wrapper

Screens import the wrapper, not the native package directly:

ts
import { openHttpsPdf } from '@/native/pdfViewer';

const response = await openHttpsPdf('https://example.com/report.pdf', {
  title: "Inspection report",
});

if (response.ok) {
  switch (response.action) {
    case "shared":
      // User completed native Share.
      break;
    case "printed":
      // User completed native Print.
      break;
    case "dismissed":
      // User closed the viewer.
      break;
  }
} else {
  console.warn("Failed to open PDF:", response.reason, response.message);
}

Notes:

  • URLs must use https:// or a non-empty file:// URI. content://, blob:, and http:// are not supported by this skill.
  • Use @microsoft/power-apps-native-pdf-viewer only for this native PDF viewing use case.
  • Use expo-document-picker for picking/importing/uploading a local PDF or document.
  • Use /add-native pdf-report for generated local PDFs. That helper requires expo-print and adds sharing behavior only when expo-sharing is already present.
  • Generated local PDFs from expo-print may be opened by native PDF viewer 0.2.9+ as file:// URIs.
  • Share and Print are built into the native viewer; there are no separate JS share/print calls.
  • The wrapper returns { ok: true } | { ok: false }; handle every non-ok reason in UI.
5. Type-check
bash
npx tsc --noEmit

Fix any TypeScript errors before rebuilding.

6. Native rebuild note

This skill does not install native code. If the package was just added outside the skill, the app needs a native rebuild outside this workflow. If the package was already in the build, Metro hot reload is enough for wrapper edits.

7. Do not use HostingSDK / PCF

Do not import or register:

ts
import NativePdfViewerExtension from "@microsoft/power-apps-native-pdf-viewer";

Do not wire Companion PCF or NativePdfViewerExtension. In Power Apps native code apps, use the native React Native API above.

8. Summary

Tell the user:

text
PDF viewer added
Package present   : @microsoft/power-apps-native-pdf-viewer
Wrapper           : src/native/pdfViewer.ts
URL support       : HTTPS and file:// (0.2.9+)
Type-check        : PASS
Native rebuild    : not performed by this skill
Usage             : openHttpsPdf(...)
HostingSDK / PCF  : not used

Update memory-bank.md under Controls:

text
- PDF viewer added — @microsoft/power-apps-native-pdf-viewer (<ISO date>)

© microsoft, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/mobile-apps/skills/add-native/add-pdf-viewer of microsoft/power-platform-skills.

Open the folder on GitHubat commit 5ef4e4f

Compare with similar skills

Add PDF Viewer 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.

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GenOffice Document CLIgenspark-ai/genoffice8.8k—~19kAutomated safety check: PassApache-2.0
Harness Book Best Practicewquguru/harness-books3.2k—~4.1kAutomated safety check: PassNone
Bookforge Korean Ebook PDF Makergongnyang/bookforge3141 repos~1.7kAutomated safety check: PassMIT

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Works with

Questions about Add PDF Viewer

What does Add PDF Viewer do?

Internal implementation skill invoked by /add-native for native PDF control workflows. Add PDF Viewer is an agent skill from microsoft/power-platform-skills, published by the product's own GitHub organization. Internal implementation skill invoked by /add-native for native PDF control workflows.

When should I use Add PDF Viewer?

Add PDF Viewer fits situations like: tasks that involve PDF.

How do I install Add PDF Viewer in Claude Code?

Run `npx skills add microsoft/power-platform-skills --skill add-pdf-viewer -a claude-code`. Or copy the skill folder (plugins/mobile-apps/skills/add-native/add-pdf-viewer in microsoft/power-platform-skills) into .claude/skills/add-pdf-viewer in your project. Claude Code loads it when a task matches its description.

How do I install Add PDF Viewer in Codex?

Run `npx skills add microsoft/power-platform-skills --skill add-pdf-viewer -a codex`. Or copy the skill folder (plugins/mobile-apps/skills/add-native/add-pdf-viewer in microsoft/power-platform-skills) into .agents/skills/add-pdf-viewer in your project. Codex loads it when a task matches its description.

Can I use Add PDF Viewer 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 microsoft/power-platform-skills --skill add-pdf-viewer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/add-pdf-viewer, .gemini/skills/add-pdf-viewer, .github/skills/add-pdf-viewer and .opencode/skills/add-pdf-viewer in your project.

What does Add PDF Viewer need to run?

Going by SKILL.md and its folder, Add PDF Viewer needs the command-line tools its instructions call (npx, node and npm). Our summary lists: Node.js. Its frontmatter pre-approves these tools: Read, Edit, Write, Grep, Glob, Bash, AskUserQuestion.

Does Add PDF Viewer access the network?

SKILL.md contains no URLs. Its commands use npx and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Add PDF Viewer safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Add PDF Viewer use?

Add PDF Viewer is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Add PDF Viewer use?

About 1.8k tokens (SKILL.md is roughly 7.1k 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 Add PDF Viewer?

Skills that share tags, products or a category with Add PDF Viewer: Markitdown (ImCa0/just-laws, 781 stars), Gzh Design (isjiamu/gzh-design-skill, 3.9k stars), GenOffice Document CLI (genspark-ai/genoffice, 8.8k stars) and Harness Book Best Practice (wquguru/harness-books, 3.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Add PDF Viewer?

microsoft (a GitHub organization, an official publisher) maintains it in microsoft/power-platform-skills, which has 967 GitHub stars. The repository holds 87 skills in this directory. The repository was last updated on October 6, 2026.

Source: microsoft/power-platform-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.