Bug: setting taskOverrides['companion.chat'] = 'byok' didn't work
when the user's allowedTiers was empty/['none']. The tier-too-low
check in run() compared task.minTier ('browser') against userMaxTier
('none') and threw TierTooLowError before the override was even read.
Same issue in canRun() and candidateTiers().
Fix: when a per-task override exists, treat it as opt-in to that tier
even if not in the global allowedTiers. The override is the user's
explicit per-task signal — overriding the global default is exactly
what an override is for.
- run(): effectiveMaxTier = max(override, userMaxTier)
- candidateTiers(task, override): adds override to baseTiers
- canRun(): now passes the override to candidateTiers
The Companion chat now correctly uses BYOK when selected from the
toolbar, even if the user hasn't enabled BYOK in their global LLM
settings.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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