{"name":"tengu_thrifty_sonic","slug":"tengu-thrifty-sonic","family":"flag","title":"Feature flags","noun":"feature flag","description":"Auto mode can be told to do file reads, searches and edits through Bash, but it's off by default.","description_source":"entry","described_by":{"version":"2.1.221","anchor":"auto-mode-bash-first-prompt-variant"},"presence":{"first_seen":"2.1.221","removed_in":"2.1.304","in_current_build":false,"newest_mined":"2.1.308","builds":64,"mined_builds":149,"first_cited":{"version":"2.1.221","released_at":"2026-08-03 22:16:25","spans":1}},"aliases":[],"entries":[{"version":"2.1.232","anchor":"bash-tool-description-shape-is-decided-once-per-process","heading":"Bash tool description shape is decided once per process","line":"The Bash tool's description length is decided once per process so it can't change mid-session.","released_at":"2026-08-13 21:30:53","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.223","anchor":"thrifty-sonic-narrowed-to-one-model-plan-artifacts-moved-to-","heading":"Thrifty-sonic narrowed to one model; plan artifacts moved to its own gate","line":"Plan artifacts now have their own switch instead of riding along with an unrelated experiment.","released_at":"2026-08-05 22:51:13","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.221","anchor":"auto-mode-bash-first-prompt-variant","heading":"Auto mode bash-first prompt variant","line":"Auto mode can be told to do file reads, searches and edits through Bash, but it's off by default.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.221","anchor":"auto-mode-can-be-told-to-do-its-work-through-bash-thrifty-so","heading":"Auto mode can be told to do its work through Bash (\"thrifty sonic\")","line":"Auto mode can be told to use Bash for reads and edits if you set the env var.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.221","anchor":"leaner-bash-tool-description-behind-the-thrifty-sonic-gate","heading":"Leaner Bash tool description behind the thrifty-sonic gate","line":"A much shorter Bash tool description exists, but only when the thrifty-sonic gate is switched on.","released_at":"2026-08-03 22:16:25","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":5,"docs":[],"docs_total":0,"gates":[{"version":"2.1.232","state":"on-in-code","account":true,"baseline":true,"code_default":null},{"version":"2.1.223","state":"on-in-practice","account":true,"baseline":true,"code_default":false},{"version":"2.1.221","state":"on-in-practice","account":true,"baseline":true,"code_default":false}],"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-thrifty-sonic","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}