DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.
When a plan-mode upgrade model is blocked by org settings, the error message now mentions both availableModels allowlist and model_access entitlement instead of just the allowlist.
Evidence
Updated messages (search for "availableModels allowlist or model_access entitlement")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
