Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.252 ·

System-context instructions filtering keyed on tengu_paper_halyard, now per-item rather than category-wide

Internal rewrite of how instruction files get filtered from context, no visible change.

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaSystem Promptwhat it touches
KindInternal Changesin v2.1.252,
Under the hood

Internal rewrite of how instruction files get filtered from context, no visible change.

The instructions-block builder was rewritten into z9n/qge/clr/oFe. The filtering logic that drops Project/Local instructions files, keyed on the tengu_paper_halyard flag, is now expressed as a per-file predicate clr rather than a single top-of-function early skip, composing with new diffing/removed-file tracking.

Read from
Feature flag
tengu_paper_halyard 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 v2.1.252: off

Read once, for one account on one subscription tier, against v2.1.252. It isn't a statement about your account. What a flag value here can and cannot tell you

See this entry in the whole of v2.1.252 →