Claude Code¶

Claude Code is the CLI coding surface for developers and technical teammates who build, extend, or run agentic workflows from the terminal.

Claude Code in Action

Anthropic Academy course covering the Claude Code workflow end to end.

Take the course
Claude Code 101

Core concepts, workflow, and team practices — skills, hooks, MCP, and agentic loops.

Concepts card

Installing Seer plugins¶

From inside Claude Code:

/plugin marketplace add seerinteractive/agents-infra
/plugin install core-dependencies@seer-agent-core
/plugin install seo@seer-agent-core        # + analytics/pdm/operations/etc as needed

If it fails:

Re-run /plugin marketplace add seerinteractive/agents-infra
Restart Claude Code
Run /plugin list to confirm the install

Not sure Claude Code is even installed? See the Seer install cards for Claude Code, Codex, and Gemini setup.

OpenCode also auto-discovers Claude Code plugins, so the same install steps work there too.

Advanced mechanics¶

Once you're past the basics, ClaudeLog has the deeper mechanics worth knowing:

CLAUDE.md best practices — persistent instructions for every Claude Code session
Plan Mode — have Claude think through an approach before it acts
Subagents — delegate across multiple Claude instances
Agent-first design — structure workflows for agentic use

Building your own skills and plugins¶

Claude Code is also where skill and plugin authoring happens. If you want to create or extend a skill instead of just using installed ones, that's covered in For Builders.

See also: Claude Cowork for the outcome-delegation workspace, if the task is more "get me a finished file" than "help me write code."