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fix(harness): classify beyond-engine primitives before capability_absent #1

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Merged
masterleopold merged 1 commit into from
Jul 17, 2026
Merged

fix(harness): classify beyond-engine primitives before capability_absent #1

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13 changes: 8 additions & 5 deletions harness/validate.py
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Original file line number Diff line number Diff line change
Expand Up @@ -57,11 +57,14 @@ def retarget_outcome(skill_yaml: str, descriptor_yaml: str) -> Outcome:
return Outcome("retarget_ok", f"{len(jsonl.splitlines())} action(s)")
except rfl.RetargetError as exc:
msg = str(exc)
if "capability_absent" in msg:
return Outcome("capability_rejected", msg)
# Separate engine coverage gaps from genuine emission errors: a primitive
# outside the engine's implemented set fails because the engine is incomplete,
# not because the model erred.
# Engine-coverage gaps take precedence over the embodiment-mismatch path. A skill
# using any primitive outside the engine's implemented set cannot be lowered by ANY
# descriptor, and rfl reports that as capability_absent for the unimplemented
# primitive itself — that is a coverage gap (beyond_engine, NOT a model error), not a
# genuine capability rejection. Only skills built purely from ENGINE_18 that a
# descriptor cannot satisfy are true capability_rejected.
if primitives_used(skill_yaml) - ENGINE_18:
return Outcome("beyond_engine", msg)
if "capability_absent" in msg:
return Outcome("capability_rejected", msg)
return Outcome("malformed", msg)
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