tengu_rustling_blossom
A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Setting CLAUDE_CODE_EXPERIMENTAL_CODE_MODE asks Claude Code to switch on an experimental Code Mode, which it can refuse for several reasons
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.318.
In the changelogs
1Releases whose published page names tengu_rustling_blossom.
-
v2.1.318
Experimental Code Mode can be requested with an environment variable
Setting
CLAUDE_CODE_EXPERIMENTAL_CODE_MODEasks Claude Code to switch on an experimental Code Mode, which it can refuse for several reasonsgate cited by this entry
Gate readings
1| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.318 read on another version | Not enough to say | no value returned | no value returned | off |
Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.
Flag server, over time
10| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| this account | off | 2026-11-09T21:35:04Z | 2026-11-12T17:30:05Z | v2.1.321 to v2.1.322 |
| anonymous | off | 2026-11-09T21:05:04Z | 2026-11-12T17:30:05Z | v2.1.321 to v2.1.322 |
| this account | on | 2026-11-09T19:00:10Z | 2026-11-09T21:15:05Z | v2.1.319 to v2.1.321 |
| anonymous | on | 2026-11-09T18:35:04Z | 2026-11-09T21:00:06Z | v2.1.319 to v2.1.321 |
| this account | off | 2026-11-07T06:05:04Z | 2026-11-09T18:55:04Z | v2.1.319 |
| anonymous | off | 2026-11-07T06:05:04Z | 2026-11-09T18:25:05Z | v2.1.319 |
| this account | no longer carried | 2026-11-04T03:30:04Z | 2026-11-04T03:30:04Z | v2.1.318 |
| anonymous | no longer carried | 2026-11-04T03:20:04Z | 2026-11-04T03:20:04Z | v2.1.318 |
| this account | on | 2026-11-04T03:00:07Z | 2026-11-04T03:20:04Z | v2.1.318 |
| anonymous | on | 2026-11-04T02:55:04Z | 2026-11-04T03:00:07Z | v2.1.318 |
One row per unbroken stretch of one reading, newest first, from snapshots taken every twenty-five minutes or so. No longer carried is not off: it means the flag server stopped returning the gate at all, which is what a retired experiment looks like. The version column is what was installed when the reading was taken, not what caused it.
First cited
1The earliest release whose published evidence quoted tengu_rustling_blossom was v2.1.318, 3 Nov 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.