Every feature flag, and where it lived
36 of 2,081 feature flags One tick per build on this box, oldest on the left. A gap is a build the feature flag was not in.
State
This account
Anonymous
Compiled default
A is the one account this site reads, N the anonymous baseline, D what the release compiled in. 1,143 of 2,081 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 v2.1.308, ◇ we found no documentation describing it.
Feature flagWhat it doesSpan v2.1.138 → v2.1.308 Status Reading
tengu_atomic_ocean ◇ The gzip decision now records exactly why it skipped, though compression stays off without a server value.v2.1.236 → v2.1.287 ○gone AND v2.1.300
tengu_ax_screen_reader ◇ The information Claude Code gives the auto mode safety check can now carry an extra marker, and a new prompt-screening step was addedv2.1.300 → v2.1.308 ◆in the build AND v2.1.295
tengu_bridge_attestation_enforce ◇ Tool requests from a bridged device can now be refused before the tool runs, but no tool uses this yetv2.1.141 → v2.1.287 ○gone AND v2.1.288
tengu_bridge_system_init ◇ A dormant bridge startup switch was removed entirely; it now always reports off and can't be turned on.v2.1.138 or earlier → v2.1.246 ○gone AND v2.1.247
tengu_ccr_keepalive_after_stop_enabled ◇ Remote (CCR) sessions gain keepalive messages after a turn stops, currently off by defaultv2.1.277 → v2.1.280 ○gone AND v2.1.281
tengu_ccr_replay_acks_at_request_dispatch ◇ A server setting used for one cloud session type was only renamed internally and still falls back to offv2.1.280 → v2.1.300 ○gone AND v2.1.301
tengu_ccr_stream_flush_on_first_delta ◇ Remote sessions gain server-controlled options to send streamed output on its first piece and to acknowledge messages only once readv2.1.285 → v2.1.300 ○gone AND v2.1.301
tengu_cfc_in_product_permissions ◇ The in-product permissions path for Claude for Chrome is hard-disabled here.v2.1.152 → v2.1.250 ○gone AND v2.1.251
tengu_chert_bezel ◇ Default false. When on, Claude Code adds the thinking-token-count-2026-05-13 beta header to API requests for models that support interleaved thinking, provided the API provider is first-party, anthropicAws or Foundry and experimental betas are not disabled (by CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS or a HIPAA restriction).v2.1.147 → v2.1.183 ○gone AND v2.1.185
tengu_classifier_summary_heuristic_emit ◇ Lightweight conversation summaries are now always generated instead of needing a flag.v2.1.138 or earlier → v2.1.224 ○gone AND v2.1.225
tengu_cloth_snorkel ◇ Artifact MCP enablement no longer falls back to a remote flag, defaulting on unless an env var overrides itv2.1.209 → v2.1.234 ○gone AND v2.1.235
tengu_cobalt_lantern ◇ Quick web setup stays off, now behind a named helper needing a flag and two entitlements.v2.1.138 or earlier → v2.1.247 ○gone AND v2.1.248
tengu_cobalt_plinth_bryony ◇ Claude Code now always tells the artifact system it supports five-class permission asks, instead of depending on a setting or remote switchv2.1.273 → v2.1.294 ○gone AND v2.1.295
tengu_cobalt_plinth_direct ◇ Artifact availability now hinges on one gate, and direct upload kicks in for create paths.v2.1.172 → v2.1.238 ○gone AND v2.1.239
tengu_cobalt_plinth_holly ◇ Artifacts gain full pin and unpin actions, wired end to end but off by default behind a gate with an env override.v2.1.259 → v2.1.284 ○gone AND v2.1.285
tengu_cobalt_plinth_putguard ◇ Default true. When on, an artifact publish upload PUT (the page or its thumbnail image) that returns a 2xx status without an x-goog-generation response header is treated as failed: it is reported as status 403 with the error upload intercepted: 2xx without x-goog-generation, on the assumption that a proxy answered instead of Google Cloud Storage. When off, any 2xx response counts as a successful upload.v2.1.193 → v2.1.238 ○gone AND v2.1.239
tengu_cobalt_plinth_reader_persist ◇ A prompt-and-context experiment switch was renamed and four other switches disappeared entirely.v2.1.191 → v2.1.245 ○gone AND v2.1.246
tengu_immediate_model_command ◇ /help, /theme and /add-dir now respond instantly; /config and /advisor do only if a remote flag turns on.v2.1.138 or earlier → v2.1.241 ○gone AND v2.1.242
tengu_kairos_loop_dynamic ◇ Checkpoints now record self-scheduling wake counts and open artifact watches, though the loop itself is off.v2.1.138 or earlier → v2.1.247 ○gone AND v2.1.248
tengu_kairos_loop_prompt ◇ The Kairos loop prompt is hardcoded off and its remote switch is gone from the build.v2.1.138 or earlier → v2.1.247 ○gone AND v2.1.248
tengu_lapis_anchor_user_turn ◇ Claude now gets a running count of tokens left by default, re-anchored on each of your prompts.v2.1.202 → v2.1.308 ◆in the build AND v2.1.236
tengu_loop_noop_fold ◇ Several artifact feature switches were renamed and re-gated, discarding any prior rollout.v2.1.198 → v2.1.241 ○gone AND v2.1.242
tengu_mocha_barista ◇ /schedule now always documents one-time runs and how to re-arm one that already fired.v2.1.138 or earlier → v2.1.245 ○gone AND v2.1.246
tengu_prompt_cache_diagnostics ◇ Cache diagnostics know when the baseline came from disk and skip misleading difference reports.v2.1.138 or earlier → v2.1.245 ○gone AND v2.1.246
tengu_report_findings_tool ◇ Two server-side switches that steered review behaviour are gone, so reviews no longer vary by remote config.v2.1.196 → v2.1.231 ○gone AND v2.1.232
tengu_retire_chat_relay_artifact_backstop ◇ A chat relay flag no longer does anything; entrypoint alone decides that path.v2.1.203 → v2.1.247 ○gone AND v2.1.248
tengu_sable_thrush ◇ Claude Code now spots server-tagged narration thinking, but the display change stays off by default.v2.1.240 → v2.1.250 ○gone AND v2.1.251
tengu_saffron_anchor ◇ A prompt-and-context experiment switch was renamed and four other switches disappeared entirely.v2.1.179 → v2.1.245 ○gone AND v2.1.246
tengu_surreal_dali ◇ Claude can read a routine's past runs and detailed run log, but a server flag gates it.v2.1.138 or earlier → v2.1.250 ○gone AND v2.1.251
tengu_thrifty_sonic ◇ Auto mode can be told to do file reads, searches and edits through Bash, but it's off by default.v2.1.221 → v2.1.303 ○gone AND v2.1.232
tengu_umber_lattice ◇ Published artifacts can gain a document database Claude reads and writes, off unless you set the env var.v2.1.224 → v2.1.266 ○gone AND v2.1.267
tengu_velvet_static ◇ Default false. Enables the /radio command, described as Listen to Claude FM lo-fi radio; with the flag off the command is not enabled. The command is not available in non-interactive mode.v2.1.138 or earlier → v2.1.250 ○gone AND v2.1.251
tengu_violin_fret ◇ Headless and desktop cloud sessions in auto or bypass mode now ask once whether Claude may act unattended, and the answer is saved.v2.1.259 → v2.1.308 ◆in the build AND v2.1.281
tengu_violin_pegbox ◇ Remote sessions started from the desktop app now need a second flag as well.never mined ·never mined AND v2.1.284
tengu_violin_purfling ◇ A forwarded shell command that writes your machine's Claude Code settings files is blocked or sent to you for approvalv2.1.283 → v2.1.287 ○gone AND v2.1.288
tengu_violin_soundpost ◇ Directory sync gains a pre-attach safety check to verify a checkout can attach cleanly, behind a new gatev2.1.277 → v2.1.281 ○gone AND v2.1.284
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