Skills.

web-search             builtin://web-search
code-review            builtin://code-review
data-analysis          builtin://data-analysis
text-summarization     builtin://text-summarization
blockchain-query       builtin://blockchain-query

tenzro skill list
tenzro skill register --spec my-skill.json
tenzro skill use --id <skill_id> --input "..."
tenzro skill search --tag retrieval

Custom skills register against any HTTP, MCP, or A2A endpoint. Creator DID is did:tenzro:system:tenzro-network for built-ins; user-owned skills carry the registering identity.