{"name":"tengu_velvet_mallet","slug":"tengu-velvet-mallet","family":"flag","title":"Feature flags","noun":"feature flag","description":"An alternate prompt wording for two tools exists but stays off unless you set an environment variable.","description_source":"entry","described_by":{"version":"2.1.223","anchor":"new-prompt-variant-experiment-for-two-tools"},"presence":{"first_seen":"2.1.166","removed_in":"2.1.196","in_current_build":false,"newest_mined":"2.1.309","builds":23,"mined_builds":150,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.228","anchor":"write-before-read-rule-is-now-decided-locally-not-by-a-remot","heading":"Write-before-Read rule is now decided locally, not by a remote flag","line":"Writing a file you have not read is now decided locally by model and permissions, not a server flag.","released_at":"2026-08-11 17:45:45","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.223","anchor":"new-prompt-variant-experiment-for-two-tools","heading":"New prompt-variant experiment for two tools","line":"An alternate prompt wording for two tools exists but stays off unless you set an environment variable.","released_at":"2026-08-05 22:51:13","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":2,"docs":[],"docs_total":0,"gates":[{"version":"2.1.228","state":"off","account":false,"baseline":false,"code_default":null},{"version":"2.1.223","state":"off","account":false,"baseline":false,"code_default":null}],"related":[{"name":"tengu_velvet_anchor","slug":"tengu-velvet-anchor","description":null},{"name":"tengu_velvet_cairn","slug":"tengu-velvet-cairn","description":"In some hosted sessions, WebFetch now returns an \"Already fetched\" note instead of fetching the same page with the same prompt again"},{"name":"tengu_velvet_cascade","slug":"tengu-velvet-cascade","description":"Which models get the simple system prompt is now decided locally, not by remote config."},{"name":"tengu_velvet_falcon_model","slug":"tengu-velvet-falcon-model","description":"Default `\"\"`. A model name substring: when `CLAUDE_CODE_VELVET_FALCON` is unset and the cached client data has no non-empty string `velvet_falcon_model`, any model whose normalized name contains this non-empty value is treated as the `falcon` class, alongside `claude-fable-5` and `claude-mythos-5`. An empty value adds no models."},{"name":"tengu_velvet_gannet","slug":"tengu-velvet-gannet","description":"Claude Code has a new check for resumed interrupted turns where it cannot ask you for permission, behind a switch that is off by default"},{"name":"tengu_velvet_hammer","slug":"tengu-velvet-hammer","description":"Default `false`. When true, or when the per-model variant `tengu_velvet_hammer_<bucket>` is true for the current model (the bucket is a model family such as `opus`, `sonnet` or `haiku`; the base bucket uses the plain name), the `Edit` tool skips its \"File has not been read yet. Read it first before writing to it.\" rejection, so a file that was never read, or was only partially read, can be edited."},{"name":"tengu_velvet_harbor_owl","slug":"tengu-velvet-harbor-owl","description":"A startup banner pitching Claude Enterprise to org admins exists but no one sees it by default."},{"name":"tengu_velvet_heron","slug":"tengu-velvet-heron","description":"A new dialog warns some users that auto mode is still billing them for classifier requests"},{"name":"tengu_velvet_ibis","slug":"tengu-velvet-ibis","description":"MAX_MCP_OUTPUT_TOKENS is still honoured first, but it's no longer sanity-checked as a number."},{"name":"tengu_velvet_marble","slug":"tengu-velvet-marble","description":null}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-velvet-mallet","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}