Kiro CLI: idle detection rules + integration proposal

[filhocf]

Related closed issues: #185 (native detection added), #255 (blocked hook support), #388 (subagent blocked), #749 (session restore not persisted). This covers what's still missing after those were resolved.

Context: I use Kiro CLI daily inside herdr (v0.7.1, Linux). Detection works for working and blocked (tool_approval + subagent_approval) thanks to #185/#255/#388, but there's no idle rule in the remote manifest. The agent falls back to default_known_agent_idle_fallback instead of positively matching idle. And per #749, session restore still isn't possible without an official integration.

What I did: Created a local override at ~/.config/herdr/agent-detection/kiro.toml that adds idle detection. It works reliably:

[[rules]]
id = "kiro_idle_prompt"
state = "idle"
priority = 50
region = "whole_recent"
visible_idle = true
line_regex = ['^\s*▸\s*$']

The ▸ character is the Kiro CLI input prompt — always visible at the bottom when the agent is waiting for user input. Tested on Kiro CLI 2.11.0.

Proposal 1 (low effort): Add the idle rules above to the remote manifest for Kiro. This gives positive idle detection instead of fallback.

Proposal 2 (medium effort, future): Official Kiro CLI integration for session restore. Kiro CLI now has hooks (PreToolUse, PostToolUse, PostMessage, Startup, Shutdown) in ~/.kiro/hooks/. A herdr-agent-state.sh hook could report session identity on startup, enabling herdr integration install kiro with session restore after server restart.

I'm happy to:

• Submit a PR for the idle manifest rules (proposal 1)
• Help design/test the integration hook (proposal 2)
• Provide logs, screen captures, or agent explain output as needed

Environment: herdr 0.7.1, Kiro CLI 2.11.0, Linux x86_64, remote manifest 2026.06.10.1