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 v2.1.26 Home All releases olderv2.1.25 v2.1.27newer
Claude Code v2.1.26

MCP Permission Mode: follow_a_plan

A new follow_a_plan permission mode has been added for MCP server interactions. The available permission modes are now ask, skip_all_permission_checks, and follow_a_plan. When the permission mode is set, a confirmation message "Permission mode set to: [mode]" is returned. This mode appears to be used during plan execution to provide an intermediate permission level between full ask and full bypass.

Evidence

Permission mode handler (search for "follow_a_plan" or "Permission mode set to:")

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

See this entry in the whole of v2.1.26 →