Add Astria image and video MCP plugin

[burgalon]

What this adds

Astria plugin listing: product photography, virtual try-on, professional headshots, image edits, reusable references, photoshoot templates, and video generation through its hosted MCP server.

The setup prompt reads the maintained public docs, uses OAuth, checks the account and live models without generating media, and requires authorization for paid work. It preserves submission keys and retrieves completed results. The entry documents an MCP integration; it does not claim an approved official Grok Bot marketplace listing.

Checklist

• This PR adds exactly one new file under content/: content/plugins/astria.md.
• Required fields and controlled vocabularies follow CONTRIBUTING.md; verification remains with maintainers.
• npm run validate passes locally: 1,830 entries, including 56 plugins.
• astro sync passes against the canonical content schema.
• slug is kebab-case and exactly matches the filename.
• Complete setup and generation tested end to end in Grok Bot (see verification scope below).
• Every frontmatter URL resolves to real, relevant public content.
• The prompt is the complete setup prompt, with no credentials or invented endpoints.
• The body is plain Markdown.
• No verified_at, status: live, awesome_score, featured, or sponsor flag is set.
• This describes an executable integration and its limitations, rather than an advertisement.
• Astria is credited as the creator through its real astriaai GitHub organization.
• This directory contribution is licensed under CC BY 4.0, attributed to Astria and grokbot.dev.

Verification scope

Authenticated production get_profile and list_models reads succeeded through the Astria MCP connector in Codex on October 11, 2026. Public OAuth discovery advertises PKCE, browser consent, refresh tokens, and public-client dynamic registration. No paid generation was submitted for this directory check.

The shared plugin package passed source-parity validation, 19 RSpec examples, six existing release tests, and deterministic archive checks. Grok Bot host login, generation, and UI rendering were not exercised here; the listing stays proposed for independent review. Its setup prompt reports unsupported remote-MCP configuration instead of falsely claiming connection. Please verify that host-specific path before making it live.

Where it came from

• Maintained source: https://github.com/astriaai/skills
• Operating instructions: https://github.com/astriaai/skills/blob/main/astria-api/SKILL.md
• Hosted MCP endpoint: https://mcp.astria.ai/mcp
• Product: https://www.astria.ai