Claude pane detected as blocked from agent prose "Would you like to … yes" with no dialog open

[memelet]

Is this a reproducible bug?

• I confirm this is a reproducible bug, not a feature request, idea, question, contribution proposal, or direction check.
• I reproduced this bug on the version and environment reported below using the exact steps provided.

Current behavior

A Claude Code screen with no dialog on it is detected as blocked. The screen only has agent output that says "Would you like to … yes". herdr agent explain reports state: blocked, rule legacy_no_prompt_blocker.

Removing that sentence gives idle. Adding a visible prompt box also gives idle.

Live effect, seen once: herdr agent prompt to a Claude agent returned agent_blocked. A minute later herdr agent list showed that agent working, with no dialog open. The message was not delivered. I could not capture which rule fired at that moment.

Expected behavior

A Claude screen with no approval or question dialog should not be detected as blocked. Plain prose from the agent should not cause agent prompt to reject a message.

Reproduction

cat > blocked.txt <<'EOF'
● I finished the refactor and the tests pass.

  Would you like to open a pull request? If yes, I will push the branch.

⏺ Bash(git status)
  ⎿  On branch feature
EOF

cat > control.txt <<'EOF'
● I finished the refactor and the tests pass.

⏺ Bash(git status)
  ⎿  On branch feature
EOF

herdr agent explain --file blocked.txt --agent claude | grep -E '^(state|rule):'
herdr agent explain --file control.txt --agent claude | grep -E '^(state|rule):'

Output:

state: blocked
rule: legacy_no_prompt_blocker (region=whole_recent priority=300)
state: idle
rule: none

Impact

I run several Claude Code sessions that message each other with herdr agent prompt. A false blocked rejects the message, so it is silently lost. The sending session then tells me a session needs a person when it does not.

Environment

• Herdr version: 0.8.2 (client and server)
• Update channel (stable or preview): stable
• Operating system: Arch Linux, kernel 7.2.3
• Terminal: Ghostty
• Shell, if relevant: bash
• Relevant config, if any: Claude detection manifest 2026.09.11.1 (remote, reported current). Claude Code 2.1.266.