Extended Thinking Mode for claude-opus-4-5

What: Thinking mode now supports claude-opus-4-5 model via feature flag.

How it changed:

• Previous: Only claude-sonnet-4-5 had thinking enabled by default
• Now: claude-opus-4-5 can enable thinking via tengu_deep_ocean_current feature flag

Details:

• VrA() function at line 221003-221012 updated with new model check
• Feature flag check: BZ("tengu_deep_ocean_current", "on_by_default", !1) at line 221011
• Evidence: No deep_ocean_current in v2.0.58, added in v2.0.59