Add axiom plugin to marketplace catalog

[seiflotfy]

Summary

• Add the axiom plugin (https://github.com/axiomhq/skills) to .grok-plugin/marketplace.json as a remote source pinned to commit 76f5af39bdf47b62acb8c36c1dd9fdc404919438
• Category observability, keywords for logs/metrics/traces/sre, domains axiom.co and app.axiom.co
• Regenerate .grok-plugin/plugin-index.json, which picks up the plugin's 7 skills (axiom-alerting, axiom-sre, building-dashboards, controlling-costs, query-metrics, spl-to-apl, writing-evals)

Test plan

• python3 scripts/validate-catalog.py → Catalog OK
• python3 scripts/generate-plugin-index.py --check → Plugin index OK (fetches the pinned commit and verifies the committed index matches)

[ykeremy]

Please make sure your plugin is advertised as expected and works well in Grok Build.

Since this PR introduces your new plugin, we recommend pointing the xAI Official marketplace at your branch so you can test how it appears and functions.

In your ~/.grok/config.toml, update the xAI Official source like this:

[[marketplace.sources]]
name = "xAI Official"
git = "https://github.com/xai-org/plugin-marketplace.git"
branch = "refs/pull/<pr number>/merge"

Then go to /marketplaces and press r to refresh. The change takes effect instantly. Once done, please verify that your plugin shows up correctly, is properly advertised, and works as expected in Grok Build.

Let us know the results or if you run into any issues!

[ykeremy]

LGTM @seiflotfy. I just noticed your MCP isn't included in the plugin. Is that intentional, asking out of curiosity?

[seiflotfy]

I'm on it. Was going to add that right now Sent via Superhuman ***@***.***>

…

On Fri, Jun 26, 2026 at 9:55 AM, Kerem Yilmaz ***@***.***> wrote: Merged #22 <#22> into main. — Reply to this email directly, view it on GitHub <#22?email_source=notifications&email_token=AAA4YTPRWNPE3XALLDFILG35BYM5LA5CNFSNUABQM5UWIORPF5TWS5BNNB2WEL2JONZXKZKFOZSW45CON52GSZTJMNQXI2LPNYXTENZSGM2DGOJRGMZTTJTSMVQXG33OU5WWK3TUNFXW5JLFOZSW45FMMZXW65DFOJPWG3DJMNVQ#event-27234391339>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAA4YTJQKJBITN5GFHAMW5L5BYM5LAVCNFSNUABGKJSXA33TNF2G64TZHMYTENBQGEYTQMJXGA5US43TOVSTWNBWGQ2TAMBTGQ2TPILWAI> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[ykeremy]

Whoops sorry, I just merged the PR. Feel free to open up another with the updated SHA.

[seiflotfy]

Here you go 😄
Thanks for looking into it
#61