{"name":"tengu_velvet_moon","slug":"tengu-velvet-moon","family":"flag","title":"Feature flags","noun":"feature flag","description":"Claude Code can tell the model the user pays per token and what a Bash call costs, but both notes fall back to off","description_source":"entry","described_by":{"version":"2.1.290","anchor":"bash-cost-and-per-token-cost-prompt-sections-added-both-beh"},"presence":{"first_seen":"2.1.290","removed_in":null,"in_current_build":true,"newest_mined":"2.1.295","builds":6,"mined_builds":138,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.290","anchor":"bash-cost-and-per-token-cost-prompt-sections-added-both-beh","heading":"Prompt notes on token cost and Bash call cost, both off by default","line":"Claude Code can tell the model the user pays per token and what a Bash call costs, but both notes fall back to off","released_at":"2026-10-05 18:12:44","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":1,"docs":[],"docs_total":0,"gates":[{"version":"2.1.290","state":"unknown","account":null,"baseline":null,"code_default":false}],"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":null},{"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_mallet","slug":"tengu-velvet-mallet","description":"An alternate prompt wording for two tools exists but stays off unless you set an environment variable."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-velvet-moon","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}