Individual skill
cookie-debugging
Uses Chrome DevTools MCP for inspecting, debugging, and testing cookies, session state, authentication issues, and cookie consent compliance. Use when diagnosing 401/403 errors, authentication redirects, session expiration, Cookie/Set-Cookie header issues, cookie banner consent conformance, or third-party cookie/SameSite/Partitioned cookie warnings.
Google/antigravity/skills/cookie-debugging/SKILL.md
Source commit a2d33761e49b98f6ec1b48f12143264eb9b4ff4f
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- Network or broad shell
- Last checked
- Nov 10, 2026
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- Repository stars (not skill ratings)
- 71,110
- Repository last updated
- Nov 9, 2026
- License
- CC0-1.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
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## Core Concepts
### HttpOnly vs Client-Side Storage
Cookies marked `HttpOnly` cannot be accessed or modified by client-side JavaScript (`cookieStore` or `document.cookie`). However, the browser **automatically attaches active HttpOnly cookies to outgoing HTTP request headers (`Cookie`)**.
- To inspect current `HttpOnly` values: Look at the `Cookie` request header of any outgoing HTTP request via `get_network_request`.
- To inspect how cookies were created or configured: Look at the `Set-Cookie` response header of login/auth responses.
- To inspect non-`HttpOnly` cookies: Use `evaluate_script` with the modern `cookieStore` API (`async () => await cookieStore.getAll()`).
### Session Strategy: Live Tab vs Isolated Context
Choose the right session environment to avoid state contamination (e.g., residual analytics or auth tokens):
