Breaking changes:
- AgentRunResult now requires sessionId field
- AgentOptions now requires continue function
- Agent CLI outputs JSON {stepHash, sessionId} instead of plain CAS hash
- Engine parses JSON output (with legacy CAS hash fallback)
New features:
- Frontmatter validation retry: if agent output lacks valid frontmatter,
engine calls agent.continue() up to 2 times with correction message
- Session tracking: sessionId flows from agent → engine → StepOutput
- Hermes agent: session parse failure is now a hard error (no raw text fallback)
- Hermes agent: supports --resume for continue sessions
Closes#384
Agent output must contain valid YAML frontmatter matching the role schema.
If frontmatter parsing fails, the step fails immediately with a clear error
instead of falling back to an LLM extraction that can fabricate values.
The extract module remains as a public API export but is no longer used
in the agent run loop.
Breaking change: agents that relied on LLM extraction to produce valid
output will now fail. They must output proper frontmatter.
xiaoju