When the orchestrator needs a fresh system prompt (e.g. CLAUDE.local.md was
updated), `ao start --continue` kills the existing session and respawns with
`claude --continue`, preserving conversation history while reloading prompts.
Changes:
- Add `continue` option to AgentLaunchConfig and OrchestratorSpawnConfig
- Claude Code agent plugin passes --continue to CLI when set
- Session manager forwards continue option to agent launch config
- `ao start --continue` kills existing orchestrator, respawns with continue flag
- Other agent plugins unaffected (optional field, backwards-compatible)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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