tengu_agents_md_mod
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.
A new built-in agents-md plugin can load AGENTS.md as project instructions instead of, or alongside, CLAUDE.md
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.274.
In the changelogs
4Releases whose published page names tengu_agents_md_mod.
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v2.1.281
tengu_agents_md_mod default flipped on: AGENTS.md loading plugin
The AGENTS.md plugin's availability check now falls back to true, and the flag server reads it as on for this site's account
gate cited by this entry, found in this entry's text
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v2.1.280
AGENTS.md-as-instructions plugin gate simplified, still off by default
The availability check for the built-in AGENTS.md plugin was simplified, but it's still off by default
gate cited by this entry, found in this entry's text, named in this entry
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v2.1.277
AGENTS.md fallback is now the default instruction-file mode
AGENTS.md now loads by default when a project has no CLAUDE.md, and the setting controlling it is renamed
gate cited by this entry
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v2.1.274
New built-in AGENTS.md plugin (off by default)
A new built-in agents-md plugin can load AGENTS.md as project instructions instead of, or alongside, CLAUDE.md
gate cited by this entry
Gate readings
4| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.281 read on another version | On for this account, and not off by default | on | on | on |
| v2.1.280 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.277 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.274 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
20| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| this account | on | 2026-11-02T13:05:04Z | 2026-11-12T17:55:04Z | v2.1.316 to v2.1.322 |
| anonymous | on | 2026-10-17T05:30:04Z | 2026-11-12T17:55:04Z | v2.1.302 to v2.1.322 |
| this account | off | 2026-11-02T12:55:05Z | 2026-11-02T12:55:05Z | v2.1.316 |
| this account | on | 2026-11-01T20:45:05Z | 2026-11-02T12:40:07Z | v2.1.316 |
| this account | off | 2026-11-01T20:40:05Z | 2026-11-01T20:40:05Z | v2.1.316 |
| this account | on | 2026-11-01T20:25:04Z | 2026-11-01T20:30:06Z | v2.1.316 |
| this account | off | 2026-11-01T20:20:05Z | 2026-11-01T20:20:05Z | v2.1.316 |
| this account | on | 2026-10-07T18:00:12Z | 2026-11-01T19:30:06Z | v2.1.292 to v2.1.316 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | on | 2026-09-18T18:20:06Z | 2026-10-17T05:10:04Z | v2.1.277 to v2.1.302 |
| this account | off | 2026-10-07T17:59:34Z | 2026-10-07T17:59:34Z | v2.1.293 |
| this account | on | 2026-09-18T23:25:04Z | 2026-10-07T17:10:05Z | v2.1.277 to v2.1.292 |
| this account | off | 2026-09-18T22:35:04Z | 2026-09-18T22:35:04Z | v2.1.277 |
| this account | on | 2026-09-18T18:20:06Z | 2026-09-18T22:05:04Z | v2.1.277 |
| anonymous | off | 2026-09-18T17:20:05Z | 2026-09-18T18:00:06Z | v2.1.276 |
| this account | off | 2026-09-18T17:20:05Z | 2026-09-18T18:00:06Z | v2.1.276 |
| anonymous | on | 2026-09-18T17:16:15Z | 2026-09-18T17:16:15Z | v2.1.277 |
| this account | on | 2026-09-18T17:16:15Z | 2026-09-18T17:16:15Z | v2.1.277 |
| this account | off | 2026-09-17T18:00:06Z | 2026-09-18T16:20:04Z | v2.1.274 to v2.1.276 |
| anonymous | off | 2026-09-17T17:35:05Z | 2026-09-18T16:20:04Z | v2.1.274 to v2.1.276 |
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
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
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.