Under the hoodTier: how much it should matter to you
4Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
ModelsArea: what it touches
Internal ChangesKind: in v2.1.315,
What probably matters to youSection of the release
Unclear It is not stated what this capability changes in how Claude Code works with these models.
What
Claude Code keeps a table of the models it supports and what each one can do. Many of those models, including Opus 4.1 era models, now list a capability called tool_loaded_text, which Claude Code looks up by name.
Why
Models that list this capability get whatever behaviour Claude Code ties to it, which appears to concern text shown when a tool is loaded.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not stated what this capability changes in how Claude Code works with these models.
