All platforms now use skill_format exclusively. The old
WorkflowCommandGenerator, TaskToolCommandGenerator, and
AgentCommandGenerator code paths in _config-driven.js were
no-ops — collectSkills claims every directory before the
legacy collectors run, making their manifests empty.
Removed:
- workflow-command-generator.js (deleted)
- task-tool-command-generator.js (deleted)
- writeAgentArtifacts, writeWorkflowArtifacts, writeTaskToolArtifacts
- AgentCommandGenerator import from _config-driven.js
- Legacy artifact_types/agents/workflows/tasks result fields
Simplified installToTarget, installToMultipleTargets, printSummary,
and IDE manager detail builder to skills-only.
Updated test fixture to use SKILL.md format instead of old agent format.