- check:error-helper: githubSkillTools.ts (#6186 wave) built MCP install
error results with raw err.message — routed through sanitizeErrorMessage()
(Hard Rule #12; 19/19 agentSkillTools tests green)
- check:mutation-test-coverage: tests/unit/combo-provider-cooldown-sibling.test.ts
(#6216) was missing from stryker.conf tap.testFiles — added so its mutant
kills count on nightly-mutation