You'll noticeTier: how much it should matter to you
5Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Terminal RenderingArea: what it touches
New FeaturesKind: in v2.1.277,
What probably matters to youSection of the release
What
When an assistant reply includes a Mermaid diagram (a way of describing flowcharts and sequence diagrams as text, wrapped in a ```mermaid code block), Claude Code can now detect it and redraw it directly in the terminal using box-drawing characters, in place of the raw Mermaid source. If a diagram can't be laid out or is too large, it's left as plain text instead.
Why
This lets you see an actual diagram in the terminal instead of raw Mermaid markup, making flowcharts and sequence diagrams in a response easier to read at a glance. Whether this is active for a given account depends on a setting, tengu_mermaid_mod, which nothing has yet been read about.
Read from
Feature flag
tengu_mermaid_modNot 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 v2.1.277: 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.
