check the cli is installed and signed in at session start

[tulioz]

session start used to go quiet when the cli was missing or there was no login, now it says so. note the hook command string changes, so codex and gemini will ask to trust it again once.

[aviator-app]

✅ FlexReview Status

Common Owner: aviator-co/engineering (expert-load-balance assignment)
Owner and Assignment:

• 🔒 aviator-co/engineering (expert-load-balance assignment)
  • Slack: #fr-eng-notifications
  • Assigned: jainankit, simsinght
  Owned Files

  • 🔒 cmd/aviator/hooks.go
  • 🔒 internal/adapter/adapter.go
  • 🔒 internal/adapter/agents.go
  • 🔒 internal/adapter/reminder.go
  • 🔒 internal/adapter/reminder_test.go
  • 🔒 internal/adapter/settingshook.go

Review SLO: 7 business hours if PR size is <= 200 LOC for the first response.

[aviator-app]

Current Aviator status

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This PR was merged using Aviator (commit d2ee651).

Stack

• 👉 #24 check the cli is installed and signed in at session start (this PR)
• #23 simplify init and add a login prompt (merged)
• master

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