{"name":"tengu_dunwich_bell","slug":"tengu-dunwich-bell","family":"flag","title":"Feature flags","noun":"feature flag","description":"Default `false`. Gates the memory recall survey: when on, and Claude's latest reply cites a memory in a complete sentence of at most 250 characters, Claude Code may show that sentence under `Claude recalled a memory:` and ask `How was Claude's recollection?` (bad, fine or good), on a random sample whose rate is `tengu_velvet_moth` (code default `0.2`). The survey stays off while `CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY` is set or the `allow_product_feedback` policy disallows it.","description_source":"code","described_by":{"bundle":"2.1.286","author":"claude-opus-5-5"},"presence":{"first_seen":"2.1.138","removed_in":"2.1.309","in_current_build":false,"newest_mined":"2.1.309","builds":143,"mined_builds":150,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.105","anchor":"memory-rating-survey-in-development","heading":"Memory Rating Survey [In Development]","line":null,"released_at":"2026-04-13 19:51:19","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":1,"docs":[],"docs_total":0,"gates":[{"version":"2.1.105","state":"off","account":false,"baseline":false,"code_default":null}],"related":[{"name":"tengu_1p_event_batch_config","slug":"tengu-1p-event-batch-config","description":"Default `{}`. Batch settings for Claude Code's first-party event logger: `scheduledDelayMillis` (falls back to `OTEL_LOGS_EXPORT_INTERVAL`, then `10000`), `maxExportBatchSize` (default `200`) and `maxQueueSize` (default `8192`), plus `skipAuth`, `maxAttempts`, `path` and `baseUrl` passed to the exporter. When the value changes during a session, the logger is flushed and rebuilt with the new settings."},{"name":"tengu_account_plugins_sync_enabled","slug":"tengu-account-plugins-sync-enabled","description":"Plugins you enabled on claude.ai can be pulled to your machine, but only your account server can enable it."},{"name":"tengu_account_skills_sync_enabled","slug":"tengu-account-skills-sync-enabled","description":"Account skills-sync eligibility logic generalized into a reusable descriptor"},{"name":"tengu_adopt_claim","slug":"tengu-adopt-claim","description":"Stale adopted session claims now return their data marked stale instead of being discarded"},{"name":"tengu_adopt_link","slug":"tengu-adopt-link","description":"Adopting an agent's transcript now hard-links the file, copying only when linking is impossible."},{"name":"tengu_adopt_relink","slug":"tengu-adopt-relink","description":"On startup, subagent transcripts stored as symlinks are converted to hard links or copies."},{"name":"tengu_advisor_unknown_content","slug":"tengu-advisor-unknown-content","description":"Advisor output you couldn't see now shows an error or a clear \"declined to advise\" message."},{"name":"tengu_agent_frontmatter_mode_widening_carry_ignored","slug":"tengu-agent-frontmatter-mode-widening-carry-ignored","description":"An agent definition's permissionMode can no longer widen the mode inherited from its parent context."},{"name":"tengu_agent_hooks_origin_untrusted","slug":"tengu-agent-hooks-origin-untrusted","description":"Agents in untrusted folders can no longer define inline MCP servers; trust the project to allow it."},{"name":"tengu_agent_list_attach","slug":"tengu-agent-list-attach","description":"Default `false`. When `CLAUDE_CODE_AGENT_LIST_IN_MESSAGES` is unset or not a recognised boolean, `true` sends the `Agent` tool's list of agent types as `agent_listing_delta` attachments in the conversation (after the first, only the added and removed types) and leaves it out of the tool description. A truthy `CLAUDE_CODE_DISABLE_ATTACHMENTS` or `CLAUDE_CODE_SIMPLE` keeps the list in the description."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-dunwich-bell","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}