Teknium 54db7cbbe1 fix(agent): tiered context pressure warnings + gateway dedup (#6411) ...

Combines the approaches from PR #6309 (duan78) and PR #5963 (KUSH42):

Tiered warnings (from #5963):
- Replaces boolean _context_pressure_warned with float _context_pressure_warned_at
- Fires at 85% (orange) and re-fires at 95% (red/critical)
- Adds 'compacting context...' status message before compression

Gateway dedup (from #6309):
- Class-level dict _context_pressure_last_warned survives across AIAgent
  instances (gateway creates a new instance per message)
- 5-minute cooldown per session prevents warning spam
- Higher-tier warnings bypass the cooldown (85% → 95% always fires)
- Compression reset clears the dedup entry for the session
- Stale entries evicted (older than 2x cooldown) to prevent memory leak

Does NOT inject into messages — purely user-facing via _safe_print (CLI)
and status_callback (gateway). Zero prompt cache impact.

Fixes #6309. Fixes #5963.

2026-04-08 21:31:44 -07:00

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