The pinned schemaInstruction said only "Respond with a single JSON object
matching this schema", contradicting every role prompt that says to emit via
the emit_artifact tool. Two stated channels for one artifact, and the pinned
one won.
ResponseFormat.Json is built under exactly the condition that offers the tool
(an llmEmitted slot — see emitArtifactTool), so the tool is always available
wherever this instruction renders, and the kernel prefers it: tool-calling
models are more reliable at it and it sidesteps llama.cpp's grammar+tools
incompatibility. The instruction now names it, and keeps raw JSON as what to do
when told to stop calling tools — which is what the tools-less final pass
demands and what the executor already accepts either way
(llmArtifactOverride ?: response.text).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
kami
c70b6779a3