Source Intelligence

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.

All of v2.1.221 Home All releases olderv2.1.220 v2.1.222newer

MCP retroactive-approval retry check consolidated

Under the hood
Useful2 Signal0
MCP

Retrying MCP calls that need approval now uses one shared rule, so behaviour is consistent.

Feature flag
tengu_mcp_proxy_needs_approval_retry Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.221: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.221. It isn't a statement about your account. What a flag value here can and cannot tell you

What

The condition that decides whether a -32003 needs_approval response should be retried is now one predicate shared by both places that used it.

Details
  • The predicate covers the error code, presence of args_sha256 in data, the retry not yet being used, and the gate check.
  • It is reused by the isExpectedError classifier and by the retry branch.
  • The tool name interpolated into the log line is type-checked before use instead of being read off an untyped object.
  • Gated on tengu_mcp_proxy_needs_approval_retry with fallback true.
Evidence

tengu_mcp_proxy_needs_approval_retry

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.221 →