AGPL-3.0-or-later · forever.

the standard library

nika:assert

Fail-fast guard: fail the task when condition is false (else no-op). One of 28 builtins in the closed nika: namespace.

the core familycontrol flow and run-stream primitives

  • corefamily6 tools
  • 2argsdeclared contract
  • 1requiredcheck teaches a miss
  • 2skeletonsship this tool

the contract

2 args · 1 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.

condition*
booleanthe resolved boolean to check
message
stringfailure message

in a real file

from the agent-loop skeleton
agent-loop.nika.yaml
  confirm:    with:      has_findings: ${{ size(tasks.execute.output.findings) > 0 }}   # the check crosses as ONE boundary expression    invoke:      tool: "nika:assert"      args:        condition: "${{ with.has_findings }}"        message: "Agent returned no findings, do not trust an empty run"   # SLOT

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

cross-references

ships in skeletons

the check gates

the core family

6 tools

control flow and run-stream primitives.

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 →