types.ts comment 'Must perfectly match concatenated streamed chunks' is not enforced and currently violated on abort

Opus finding

types.ts comment 'Must perfectly match concatenated streamed chunks' is not enforced and currently violated on abort

• src/providers/types.ts:27-33
• src/providers/anthropic.ts:116-134

Comment claims final UnifiedResponse.text/thinking must match the concatenation of streamed chunks. In the abort path of Anthropic, the function returns whatever was accumulated, which DOES match concatenated chunks — but only if onTextDelta callbacks didn't throw. In the success path, the code returns the locally-accumulated string rather than reading from finalMessage.content, which is correct but undocumented. The comment is a strong invariant that needs either enforcement or a softer rewording, especially when finalMessage from Anthropic may include cached or transformed final text different from raw deltas.