How do I install the Fix Csp Compliance skill?

Run npx skillmds@latest add williamcorrea23/fix-csp-compliance in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Fix Csp Compliance skill do?

Fix Content Security Policy (CSP) compliance issues that UI5 linter reports but cannot auto-fix. Use this skill when linter outputs: - `csp-unsafe-inline-script` with message "Use of unsafe inline script" Trigger on: inline JavaScript in HTML files, script tags without src attribute, onclick/onload handlers in HTML. Also use when user mentions 'security headers', 'inline script warning', 'CSP policy', 'unsafe-inline', or 'Content-Security-Policy'. Provides guidance on moving inline scripts to external files for CSP compliance. It is listed under Web & Frontend on SkillMD.

Is Fix Csp Compliance safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Fix Csp Compliance?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Fix Csp Compliance free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Fix Csp Compliance?

williamcorrea23 (@williamcorrea23) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Fix Csp Compliance by williamcorrea23

Name: Fix Csp Compliance
Author: williamcorrea23

Fix CSP Compliance - Unsafe Inline Scripts

Key Rules

NEVER delete inline script content. Always extract it to an external .js file and replace the inline <script>...</script> with <script src="filename.js"></script>. Even trivial config objects, debug flags, or seemingly unused code must be externalized — removal is a functional regression.
File naming: use a descriptive name matching the content's purpose (e.g., appConfig.js for configuration, init.js for initialization).

This skill fixes Content Security Policy (CSP) compliance issues that the UI5 linter detects but cannot auto-fix because they require restructuring code into external files.

Linter Rule Handled

Rule ID	Message Pattern	Severity	This Skill's Action
`csp-unsafe-inline-script`	Use of unsafe inline script	Warning	Move to external JS file

When to Use

Apply this skill when you see linter output like:

index.html:15:5 warning Use of unsafe inline script  csp-unsafe-inline-script
test.html:20:5 warning Use of unsafe inline script  csp-unsafe-inline-script

Background: Why CSP Matters

Content Security Policy (CSP) is a security feature that helps prevent:

Cross-Site Scripting (XSS) attacks
Data injection attacks
Unauthorized script execution

Inline scripts are considered unsafe because an attacker who manages to inject HTML can also inject malicious JavaScript. CSP-compliant apps use script-src 'self' which blocks inline scripts.

Documentation: Content Security Policy

Detection

The linter flags <script> tags that:

Have NO src attribute AND
Have inline JavaScript content

Flagged:

<script>
    console.log("Inline code");  <!-- Flagged -->
</script>

<script type="text/javascript">
    doSomething();  <!-- Flagged -->
</script>

<script type="module">
    import { foo } from './foo.js';  <!-- Flagged -->
</script>

Not flagged:

<script src="app.js"></script>  <!-- External = OK -->

<script src="app.js">
    // This content is ignored by browser anyway
</script>

<script type="text/xmldata">
    <!-- Non-JS MIME type = OK -->
    <data>...</data>
</script>

Fix Strategy

The fix for every inline script is the same: move it to an external file and add a <script src="..."> tag in its place. The content of the inline script is preserved — just in a separate .js file instead of inside the HTML. Never delete inline script content; always externalize it.

1. Basic Inline Script → External File

Problem: Inline JavaScript in HTML.

<!-- Before - index.html -->
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>My App</title>
    <script>
        window.myConfig = {
            apiUrl: "/api/v1",
            debug: true
        };
    </script>
    <script
        id="sap-ui-bootstrap"
        src="resources/sap-ui-core.js"
        data-sap-ui-async="true">
    </script>
    <script>
        sap.ui.require(["my/app/init"], function(init) {
            init.start();
        });
    </script>
</head>
<body class="sapUiBody" id="content">
</body>
</html>

Fix Strategy: Move inline scripts to external files.

<!-- After - index.html -->
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>My App</title>
    <script src="config.js"></script>
    <script
        id="sap-ui-bootstrap"
        src="resources/sap-ui-core.js"
        data-sap-ui-async="true"
        data-sap-ui-on-init="module:my/app/init">
    </script>
</head>
<body class="sapUiBody" id="content">
</body>
</html>

// config.js
window.myConfig = {
    apiUrl: "/api/v1",
    debug: true
};

// my/app/init.js
sap.ui.define([], function() {
    "use strict";

    return {
        start: function() {
            // Initialization code
        }
    };
});

2. UI5 Bootstrap with Inline Init → data-sap-ui-on-init

Problem: Inline script after UI5 bootstrap.

<!-- Before -->
<script
    id="sap-ui-bootstrap"
    src="resources/sap-ui-core.js"
    data-sap-ui-async="true"
    data-sap-ui-resource-roots='{"my.app": "./"}'
    data-sap-ui-compat-version="edge">
</script>
<script>
    sap.ui.getCore().attachInit(function() {
        sap.ui.require([
            "sap/m/Shell",
            "sap/ui/core/ComponentContainer"
        ], function(Shell, ComponentContainer) {
            new Shell({
                app: new ComponentContainer({
                    name: "my.app",
                    async: true
                })
            }).placeAt("content");
        });
    });
</script>

Fix Strategy: Use data-sap-ui-on-init attribute.

<!-- After - index.html -->
<script
    id="sap-ui-bootstrap"
    src="resources/sap-ui-core.js"
    data-sap-ui-async="true"
    data-sap-ui-resource-roots='{"my.app": "./"}'
    data-sap-ui-compat-version="edge"
    data-sap-ui-on-init="module:my/app/init">
</script>

// webapp/init.js
sap.ui.define([
    "sap/m/Shell",
    "sap/ui/core/ComponentContainer"
], function(Shell, ComponentContainer) {
    "use strict";

    new Shell({
        app: new ComponentContainer({
            name: "my.app",
            async: true
        })
    }).placeAt("content");
});

3. Configuration Data → JSON or Module

Problem: Inline configuration object.

<!-- Before -->
<script>
    window.APP_CONFIG = {
        apiEndpoint: "https://api.example.com",
        features: {
            darkMode: true,
            analytics: false
        }
    };
</script>

Fix Strategy A: External JSON file loaded at runtime.

<!-- After - Option A: JSON file -->
<script src="config.js"></script>

// config.js - loads JSON
(function() {
    var xhr = new XMLHttpRequest();
    xhr.open("GET", "config.json", false);  // Sync for config
    xhr.send();
    window.APP_CONFIG = JSON.parse(xhr.responseText);
})();

// config.json
{
    "apiEndpoint": "https://api.example.com",
    "features": {
        "darkMode": true,
        "analytics": false
    }
}

Fix Strategy B: UI5 module with configuration.

// my/app/config.js
sap.ui.define([], function() {
    "use strict";

    return {
        apiEndpoint: "https://api.example.com",
        features: {
            darkMode: true,
            analytics: false
        }
    };
});

// Usage in other modules
sap.ui.define(["my/app/config"], function(config) {
    console.log(config.apiEndpoint);
});

4. Inline Event Handlers → External Scripts

Problem: Inline event handlers in HTML attributes.

<!-- Before -->
<button me</button>
<img src="logo.png"
<body

Fix Strategy: Use external script with event listeners.

<!-- After -->
<button id="myButton">Click me</button>
<img id="logo" src="logo.png">
<body>

// app.js
document.addEventListener("DOMContentLoaded", function() {
    document.getElementById("myButton").addEventListener("click", handleClick);
    document.getElementById("logo").addEventListener("error", function() {
        handleError(this);
    });
    init();
});

function handleClick() {
    // Click handler
}

function handleError(element) {
    // Error handler
}

function init() {
    // Initialization
}

5. Test HTML Files

Problem: QUnit test files with inline scripts.

<!-- Before - myTest.qunit.html -->
<!DOCTYPE html>
<html>
<head>
    <script src="resources/sap-ui-core.js"
        data-sap-ui-async="true">
    </script>
    <script>
        sap.ui.getCore().attachInit(function() {
            sap.ui.require(["my/app/test/myTest"]);
        });
    </script>
</head>
<body>
    <div id="qunit"></div>
</body>
</html>

Fix Strategy: Use Test Starter (also fixes prefer-test-starter).

<!-- After - myTest.qunit.html -->
<!DOCTYPE html>
<html>
<head>
    <script
        src="resources/sap/ui/test/starter/runTest.js"
        data-sap-ui-testsuite="test-resources/my/app/test/testsuite.qunit">
    </script>
</head>
<body>
    <div id="qunit"></div>
</body>
</html>

6. Dynamic Script Content

Problem: Script content generated dynamically.

<!-- Before -->
<script>
    var userId = "<%= user.id %>";  // Server-side template
    var token = "<?php echo $token; ?>";
</script>

Fix Strategy: Use data attributes or meta tags.

<!-- After -->
<meta name="user-id" content="<%= user.id %>">
<meta name="csrf-token" content="<?php echo $token; ?>">
<script src="app.js"></script>

// app.js
var userId = document.querySelector('meta[name="user-id"]').content;
var token = document.querySelector('meta[name="csrf-token"]').content;

Implementation Steps

Identify all inline scripts from linter output
Categorize each script:
- UI5 initialization → Use data-sap-ui-on-init
- Configuration → External JS file
- Event handlers → External script with addEventListener
- Test boilerplate → Use Test Starter
Create external files for the script content
Update HTML to reference external files
Test the application to ensure functionality is preserved

Common Patterns

Inline Pattern	CSP-Compliant Solution
`<script>code</script>`	`<script src="file.js">`
`data-sap-ui-on-init` with inline	`data-sap-ui-on-init="module:path/to/init"`
`onclick="fn()"`	`element.addEventListener("click", fn)`
`onerror="fn()"`	`element.addEventListener("error", fn)`
`onload="fn()"`	`DOMContentLoaded` event listener
Server-rendered config	`<meta>` tags + JS reader
QUnit inline bootstrap	Test Starter `runTest.js`

Notes

CSP compliance is a warning (not error) because some environments may not require it
The data-sap-ui-on-init attribute accepts module:path/to/module format for AMD modules
For server-rendered dynamic values, use <meta> tags or data-* attributes
Test files should use Test Starter for both CSP compliance and best practices
Some third-party libraries may require CSP adjustments - check their documentation
JSONP callbacks may need special handling in CSP configurations

Fix Csp Compliance

File contents

Fix CSP Compliance - Unsafe Inline Scripts

Key Rules

Linter Rule Handled

When to Use

Background: Why CSP Matters

Detection

Fix Strategy

1. Basic Inline Script → External File

2. UI5 Bootstrap with Inline Init → data-sap-ui-on-init

3. Configuration Data → JSON or Module

4. Inline Event Handlers → External Scripts

5. Test HTML Files

6. Dynamic Script Content

Implementation Steps

Common Patterns

Notes

Frequently asked questions

Fix Csp Compliance

File contents

Fix CSP Compliance - Unsafe Inline Scripts

Key Rules

Linter Rule Handled

When to Use

Background: Why CSP Matters

Detection

Fix Strategy

1. Basic Inline Script → External File

2. UI5 Bootstrap with Inline Init → data-sap-ui-on-init

3. Configuration Data → JSON or Module

4. Inline Event Handlers → External Scripts

5. Test HTML Files

6. Dynamic Script Content

Implementation Steps

Common Patterns

Notes

Related skills

Frequently asked questions

How do I install the Fix Csp Compliance skill?

What does the Fix Csp Compliance skill do?

Is Fix Csp Compliance safe to use?

Which AI agents work with Fix Csp Compliance?

Is Fix Csp Compliance free to use?

Who published Fix Csp Compliance?