AGPL-3.0-or-later · forever.

the standard library

nika:json_diff

JSON diff · returns an RFC 6902 JSON Patch. One of 28 builtins in the closed nika: namespace.

the data familypure JSON/data transforms, no I/O

  • datafamily9 tools
  • 2argsdeclared contract
  • 2requiredcheck teaches a miss
  • 1skeletonsship this tool

the contract

2 args · 2 required

A missing required arg is a nika check finding before anything runs; the vocabulary below comes from the binary itself (nika catalog --tools --json), not from prose.

before*
the original value
after*
the new value

in a real file

from the etl-state skeleton
etl-state.nika.yaml
  delta:    with:                           # the bindings ARE the edges · previous + fresh → delta      previous: ${{ tasks.previous.output }}      fresh: ${{ tasks.fresh.output }}    invoke:      tool: "nika:json_diff"        # RFC 6902 · empty patch = nothing new      args:        before: "${{ with.previous }}"        after: "${{ with.fresh }}"

a verbatim excerpt, real line numbers from etl-state.nika.yaml, conformance-gated upstream on every spec push. open the full skeleton →

cross-references

ships in skeletons

the check gates

the data family

9 tools

pure JSON/data transforms, no I/O.

Machines read the same vocabulary at /tools/catalog.json; the contract lives in spec 06 · stdlib. Install and ask the binary itself: nika catalog --tools. Read the spec →