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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Feature flags, all 2,095.

GrowthBook gates the client evaluates on startup. Most of what ships is behind one of these before it is announced.

Feature flags2,095seen across 150 builds
In v2.1.309900the newest inventory on disk
Gone316in an earlier build, not in the newest
Described0have a line in Anthropic's documentation
No docs line2,095no line in the documentation we hold

Every feature flag, and where it lived

80 of 2,095 feature flags One tick per build on this box, oldest on the left. A gap is a build the feature flag was not in.

A is the one account this site reads, N the anonymous baseline, D what the release compiled in. 1,158 of 2,095 gates have been read at all: a run only records the gates its own release wrote about. Claude Code evaluates its gates on Anthropic's servers, so a reading of off can be a rollout this account sits outside of, and none of it says anything about your install. How to read these.

○ not in v2.1.309, ◇ we found no documentation describing it.

Feature flagWhat it doesSpan v2.1.138 → v2.1.309 Status Reading
tengu_amber_quill_moth ◇ Publishing an artifact can carry a template choice, switched off here, plus new edit attribution.v2.1.221 → v2.1.272 ○gone AND v2.1.221 tengu_bridge_requires_action_details ◇ Detailed requires-action payloads for remote clients remain off.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.301 tengu_ccr_handoff_metadata ◇ Handing a session to the cloud can include a snapshot of your checkout, off by default.v2.1.242 → v2.1.309 ◆in the build AND v2.1.290 tengu_ccr_idle_heartbeat ◇ Remote sessions can detect a dead connection through probes and force a reconnect, off by default.v2.1.227 → v2.1.309 ◆in the build AND v2.1.228 tengu_ccr_reactivation_beat ◇ Remote sessions gain reconnect and reactivation heartbeats plus stale-connection recovery, all off here.v2.1.228 → v2.1.309 ◆in the build AND v2.1.228 tengu_ccr_reconnect_beat ◇ Remote sessions gain reconnect and reactivation heartbeats plus stale-connection recovery, all off here.v2.1.228 → v2.1.309 ◆in the build AND v2.1.228 tengu_ccr_v2_session_crud_cli ◇ A new gated flag controls session create/read/update/delete support for CCR v2 in the CLI's MCP bootstrapv2.1.211 → v2.1.309 ◆in the build AND v2.1.296 tengu_chomp_inflection ◇ The Prompt suggestions row in /config still appears only when a server-side switch is on; only the surrounding code changedv2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.288 tengu_chrome_install_upsell ◇ Chrome install upsell eligibility logic was reworked, still off by default.v2.1.206 → v2.1.309 ◆in the build AND v2.1.260 tengu_classifier_summary_llm_emit ◇ Lightweight conversation summaries are now always generated instead of needing a flag.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.225 tengu_cobalt_plinth_alder ◇ Claude can now read back a published artifact's contents; browsing, multi-file publishing and deletion are built but off.v2.1.239 → v2.1.309 ◆in the build AND v2.1.285 tengu_cobalt_plinth_bracken ◇ You could start a private artifact from a published template, but two server switches keep it shut here.v2.1.216 → v2.1.309 ◆in the build AND v2.1.273 tengu_cobalt_plinth_sedge ◇ Reading an artifact as a public non-member reader still refuses; the switch stays off in this build.v2.1.216 → v2.1.309 ◆in the build AND v2.1.275 tengu_cobalt_ridge ◇ A new remote PowerShell tool lets Claude Code run PowerShell commands on an attached Windows machine instead of locallyv2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.280 tengu_cowork_auto_mode_include_allowed_write_mcp ◇ MCP tools that may act on a session's desktop now need approval each time, and remote-session MCP prompts cannot become always-allow rulesv2.1.212 → v2.1.309 ◆in the build AND v2.1.299 tengu_cowork_chrome_automode_default ◇ The terminal tab status toggle, Claude API tip and Chrome classifier default only moved; their gate fallbacks are unchangedv2.1.187 → v2.1.309 ◆in the build AND v2.1.296 tengu_curious_tower ◇ New gated 'tether' system can thread API requests together server-side instead of resending full context each turnv2.1.265 → v2.1.309 ◆in the build AND v2.1.296 tengu_dapper_dusk ◇ Claude Code adds several new remotely controlled switches whose purpose is not yet visiblev2.1.299 → v2.1.309 ◆in the build AND v2.1.299 tengu_drift_lantern ◇ Startup prefetching is split into two steps, and one mode now skips the context prefetch and remote fetchv2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.288 tengu_eager_pillow ◇ A gated code path changes how Claude Code detects unresolved tool usesv2.1.274 → v2.1.309 ◆in the build AND v2.1.292 tengu_event_loop_stall ◇ The event-loop stall detector was rewritten as a class with identical behaviour.v2.1.267 → v2.1.309 ◆in the build AND v2.1.288 tengu_fgts ◇ Tool descriptions can differ by session proactive level; the streaming behaviour behind it is off.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.281 tengu_fleet_needs_input_nudge ◇ No description from anybody.v2.1.205 → v2.1.209 ○gone AND v2.1.205 tengu_groovy_eclipse ◇ Two new internal feature gates were added: tengu_groovy_eclipse and tengu_lucky_quillv2.1.267 → v2.1.309 ◆in the build AND v2.1.267 tengu_harbor ◇ Forked skill executions now register as real, trackable background tasksv2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.290 tengu_hearth_member_relay_rows_enabled ◇ Auto mode's safety check gains support for a project member's own session in a shared project, reachable via an environment variable or server flagv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_humble_hammock ◇ Two transcript debugging aids, raw tool inputs and exact wire block order, are computed but each sits behind its own gate.v2.1.257 → v2.1.309 ◆in the build AND v2.1.282 tengu_ide_rc_auto_enable ◇ Startup telemetry now reports Remote Control availability and an old experiment field was dropped.v2.1.203 → v2.1.309 ◆in the build AND v2.1.285 tengu_kairos_push_notifications ◇ A tool letting Claude push notifications to you stays off by default.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.248 tengu_lazy_dove ◇ Claude Code now counts turns since a person last wrote and can act once a limit is reached, but this is off unless switched on remotelyv2.1.296 → v2.1.309 ◆in the build AND v2.1.296 tengu_lexical_glade ◇ A warning for switching account or organization mid-conversation is built but held behind the tengu_lexical_glade flagv2.1.281 → v2.1.309 ◆in the build AND v2.1.307 tengu_marbled_teal ◇ Effort levels can be labelled with relative cost like ~2x, hidden behind an off gate.v2.1.224 → v2.1.309 ◆in the build AND v2.1.224 tengu_modular_mochi ◇ Destructive MCP calls under remote auto mode can now be allowed by either the existing gate or a new flag.v2.1.259 → v2.1.309 ◆in the build AND v2.1.295 tengu_onyx_sluice ◇ Artifact comments could be fetched server-side instead of through the frame host, but that switch is off.v2.1.228 → v2.1.309 ◆in the build AND v2.1.281 tengu_peppy_riddle ◇ A check that matched MCP servers against a remote list can now read a single on/off switch instead, depending on how it is calledv2.1.300 → v2.1.304 ○gone AND v2.1.300 tengu_peppy_zephyr ◇ Tool token counts for context analysis can come from the server instead of local estimates, but the gate is off.v2.1.257 → v2.1.276 ○gone AND v2.1.261 tengu_pewter_brook ◇ Accepting fullscreen now runs as a trial, and two crashed launches disable it on that machine.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.239 tengu_plum_vx3 ◇ Web search tool's model choice now goes through a feature-flag check instead of always using the main modelv2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.269 tengu_projects_compact_thread_rule_enabled ◇ Auto mode's permission check can use a 'compact' view of the conversation, off unless switched on remotely or by an environment variablev2.1.299 → v2.1.309 ◆in the build AND v2.1.299 tengu_sessions_elevated_auth_enforcement ◇ Cloud sessions get told outright they cannot message peers that require a trusted device.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.282 tengu_silly_waterfall ◇ A gated fix can now remove stale leftover transcript entries when resuming a headless sessionv2.1.271 → v2.1.309 ◆in the build AND v2.1.295 tengu_slate_lantern ◇ A new --watch-artifact flag follows a claude.ai artifact for new versions and comments, but needs account access.v2.1.198 → v2.1.309 ◆in the build AND v2.1.274 tengu_slate_lantern_ember ◇ Re-armed artifact watches could reuse an existing connection instead of starting over, but the flag is off.v2.1.236 → v2.1.309 ◆in the build AND v2.1.257 tengu_smooth_forest ◇ Rate-limit menu gains a new promotional "limit wall" option pointing to a claim pagev2.1.275 → v2.1.304 ○gone AND v2.1.275 tengu_sorrel_trellis ◇ Claude can watch artifact comment threads and post replies or edits, off unless you set the env var.v2.1.221 → v2.1.309 ◆in the build AND v2.1.246 tengu_stellar_drift ◇ Two transcript debugging aids, raw tool inputs and exact wire block order, are computed but each sits behind its own gate.v2.1.257 → v2.1.309 ◆in the build AND v2.1.281 tengu_teal_corbel ◇ Artifact live-update watching now carries the plumbing needed for automatic comment replies and cancellation.v2.1.221 → v2.1.309 ◆in the build AND v2.1.248 tengu_ticklish_pnueli ◇ Claude Code now also protects Windows profile credential files reached through WSL's /mnt paths and through Windows short file namesv2.1.290 → v2.1.309 ◆in the build AND v2.1.290 tengu_twinkling_cosmos ◇ The hint telling Claude where attached files are now names each tool's own text field instead of always saying task_descriptionv2.1.293 → v2.1.309 ◆in the build AND v2.1.304 tengu_umber_stile ◇ A new str_replace write action for the artifact database is built but not yet exposed to usersv2.1.265 → v2.1.309 ◆in the build AND v2.1.269 tengu_valiant_rain ◇ A new gate controls whether remote tools can jump the queuev2.1.280 → v2.1.309 ◆in the build AND v2.1.280 tengu_violin_adjuster ◇ Claude Code can start a turn on its own when an attached computer is reachable again or a stopped command's late result arrivesv2.1.295 → v2.1.309 ◆in the build AND v2.1.295 tengu_violin_amati ◇ Settings pushed from the control channel are checked before they can change plugin forwarding, and refusals are logged.v2.1.239 → v2.1.309 ◆in the build AND v2.1.302 tengu_violin_colophony ◇ A new remotely controlled switch, off by default, turns on a folder prompt option and a check that answers malformed permission requests for some toolsnever mined ·never mined AND v2.1.302 tengu_violin_corner ◇ When a remote tool call resumes while still waiting for your approval, Claude Code can now keep that request instead of treating it as lostv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_eye ◇ Tool approvals for remotely served tools gain two off-by-default switches, a category on each approval prompt, and settings-file write checksv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_ferrule ◇ Remote tool permission checks can retry a timed-out safety check and treat unreadable shell commands as needing a person, behind three switchesv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_violin_fhole ◇ Claude Code checks a new remote switch that is off unless turned on remotely, and what it controls is not visiblev2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_finetuner ◇ One remotely controlled feature now stays off unless the server turns it on, and stays off on errors, where before it defaulted to onv2.1.288 → v2.1.309 ◆in the build AND v2.1.288 tengu_violin_fingerboard ◇ Device-bound cloud session creation can now send a repositories_trusted field, retrying without it if the server refusesv2.1.281 → v2.1.309 ◆in the build AND v2.1.281 tengu_violin_hair ◇ Remote tool permission checks can retry a timed-out safety check and treat unreadable shell commands as needing a person, behind three switchesv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_violin_heel ◇ On Linux, project hooks can now run in a bubblewrap sandbox with no network and a hidden home folder, when a server switch allows itnever mined ·never mined AND v2.1.286 tengu_violin_lapping ◇ A new remotely controlled switch, off by default, sits alongside the new outcomes for restoring settingsv2.1.293 → v2.1.309 ◆in the build AND v2.1.293 tengu_violin_neck ◇ Code that put a placeholder in place of an attachment that could not be downloaded now reads a server-controlled switch insteadv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_violin_nut ◇ Claude Code can now work out why auto mode is off and build a notice saying so, behind a remote setting that falls back to offv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_violin_overstand ◇ A new switch, off unless turned on remotely, was added; a local override cannot enable it, and its purpose is not shownv2.1.288 → v2.1.309 ◆in the build AND v2.1.288 tengu_violin_peg ◇ New sandbox and approval flow for project hooks run read-only during cloud/remote sessionsv2.1.277 → v2.1.309 ◆in the build AND v2.1.277 tengu_violin_pernambuco ◇ Remote sessions get a new, remotely controlled check that probes a quiet stream after about 8 seconds and can give up on itv2.1.296 → v2.1.309 ◆in the build AND v2.1.296 tengu_violin_rib ◇ Remote callers using this machine's tools can get a report of its CPU, memory, disk and installed CLI tools, and can run background Bash commandsv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_saddle ◇ On macOS with the sandbox or a proxy on, project hooks run through remote tools can now run confined instead of being refused, behind a flagnever mined ·never mined AND v2.1.286 tengu_violin_speculative_classifier ◇ Two new internal feature gates appeared: tengu_unified_waterfall and tengu_violin_speculative_classifier, the latter currently stubbed to always return falsev2.1.282 → v2.1.309 ◆in the build AND v2.1.282 tengu_violin_strad ◇ Remote sessions could inherit your local permission mode and effort level, but no value is compiled in.v2.1.238 → v2.1.309 ◆in the build AND v2.1.284 tengu_violin_table ◇ Tool approvals for remotely served tools gain two off-by-default switches, a category on each approval prompt, and settings-file write checksv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_tailgut ◇ Remote tool permission checks can retry a timed-out safety check and treat unreadable shell commands as needing a person, behind three switchesv2.1.286 → v2.1.309 ◆in the build AND v2.1.286 tengu_violin_tip ◇ Claude Code adds a check for a new tip that stays off unless it is switched on remotelyv2.1.295 → v2.1.309 ◆in the build AND v2.1.295 tengu_violin_varnish ◇ Claude Code can now ask an attached remote machine whether a background command exited, is running, or was cancelledv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_waist ◇ When the machine behind a remote tool call drops off, Claude Code can now wait for it to come back before giving upv2.1.287 → v2.1.309 ◆in the build AND v2.1.287 tengu_violin_winding ◇ When a computer Claude is working on goes away, Claude now checks again after 30 seconds, 2 minutes and 5 minutes, and handles a sleeping one separatelyv2.1.295 → v2.1.309 ◆in the build AND v2.1.295 tengu_vscode_onboarding ◇ A resume-precheck gate is now passed to the VS Code extension, on by default.v2.1.138 or earlier → v2.1.309 ◆in the build AND v2.1.284 tengu_wild_tome ◇ Memory extraction gets a new 'relayFork' execution mode, off by defaultv2.1.271 → v2.1.309 ◆in the build AND v2.1.286
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