Last9 AI Toolkit

AI agents are good at writing queries and bad at knowing which query to write. This toolkit teaches coding agents — Claude Code, Codex, Grok Build, Cursor, and anything that speaks Agent Skills — how to instrument and investigate production systems with Last9: which tool to reach for, in what order, and which dead ends to skip.

Each skill encodes a workflow the way the product intends it — the skills hand off to one another when work crosses domains.

Skills

MCP gives your agent access. Skills give it judgment.

Skill	What it teaches
go-agent-install	Instrument a Go service with Last9 go-agent: detect the stack, wire chi + database/sql tracing, promote opt-in body capture, and verify spans land — without double-instrumenting
last9-logs	Log investigation: scope to a service first, attribute filters over body search, aggregate before drilling into raw lines
last9-traces	Trace investigation: a five-question interview that lands on the right tool call, plus a tracejson syntax reference card

Installation

npx skills add last9/ai-toolkit

Install a single skill, or target a specific agent:

npx skills add last9/ai-toolkit --skill last9-logs
npx skills add last9/ai-toolkit -a claude-code

Claude Code and Codex install through their marketplaces, which resolve skills directly from this repository's canonical skills/ tree. Grok Build installs straight from the plugin subdirectory:

grok plugin install --trust "last9/ai-toolkit#plugins/last9"

OpenCode users get MCP registration plus skills from a single plugin:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [["opencode-last9", { "org": "<org-slug>" }]]
}

Then run opencode mcp auth last9 once to authenticate. See plugins/opencode-last9/ for details.

Connecting to Last9

Last9 MCP is hosted, so there is no local server to run. Point your agent's MCP config at your organization's endpoint. For Codex:

[mcp_servers.last9]
url = "https://app.last9.io/api/v4/organizations/<org-slug>/mcp"

For Claude Code, add the same endpoint through its MCP configuration flow. Then run /mcp to authenticate. Keep local MCP config files (.codex/config.toml, .claude/settings.local.json) out of version control.

Contributing

The top-level skills/ directory is the single source of truth: marketplace manifests reference it directly and the OpenCode plugin assembles it into its tarball at pack time, so adding a skill is a single commit under skills/<name>/. CI validates distribution correctness (naming, declared paths, tarball completeness). See CONTRIBUTING.md for the workflow, and SECURITY.md for reporting vulnerabilities.

License

Last9 AI Toolkit is released under the MIT License.