Each phase workflow now commits its artifacts immediately:
- discuss-phase.md commits CONTEXT.md
- research-phase.md commits RESEARCH.md
- plan-phase.md commits PLAN.md (and DISCOVERY.md)
- execute-phase.md commits only execution artifacts (SUMMARY, STATE, ROADMAP)
Planning artifacts are inputs to execution and should be saved when created.
Execution artifacts are outputs and are committed after execution completes.
Closes#12