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Feature gates reference

This page owns the feature-gate taxonomy visible in cli.js: GrowthBook evaluation, tengu_* gates/signals, environment kill switches, managed-policy gates, and CLI/settings gates that switch operational behavior.

Use Telemetry and tracing for telemetry/export behavior and Environment variables reference for canonical env-var names.

Source anchors

Semantic alias	Source	Approximate location	String or symbol	Meaning
GrowthBookClient	`cli.js`	line ~129, byte `0xe138c`	`GrowthBook`	Embedded feature/experiment client.
FeatureFlagLookupWrapper	`cli.js`	line ~253, byte `0x20c503`	`Z$("..."`	Feature-flag lookup wrapper pattern.
DisableGrowthBookEnv	`cli.js`	line ~432, byte `0x2fe03e`	`DISABLE_GROWTHBOOK`	Environment kill switch for GrowthBook.
DisableCronEnv	`cli.js`	line ~1091, byte `0x4806fd`	`CLAUDE_CODE_DISABLE_CRON`	Cron/scheduled-task kill switch.
KairosCronGate	`cli.js`	line ~1091, byte `0x480583`	`isKairosCronEnabled`	Scheduled-task feature gate wrapper.
CronSchedulerRuntime	`cli.js`	line ~9564, byte `0xcd3ba4`	`createCronScheduler`	Scheduled-task runtime.
DisableRemoteControlPolicy	`cli.js`	line ~185, byte `0x11a7a3`	`disableRemoteControl`	Managed policy gate for Remote Control.
DisableSkillShellPolicy	`cli.js`	line ~185, byte `0x11a8f2`	`disableSkillShellExecution`	Managed policy gate for skill/slash shell execution.

Gate taxonomy

flowchart TD
    Decision[Runtime decision] --> GB[GrowthBook / tengu feature flags]
    Decision --> Env[Environment kill switches]
    Decision --> Policy[Managed settings / policy]
    Decision --> Cli[CLI flags]
    Decision --> Settings[User/project/local settings]

    GB --> Behavior[Feature behavior]
    Env --> Behavior
    Policy --> Behavior
    Cli --> Behavior
    Settings --> Behavior
    Behavior --> Evidence[debug / telemetry evidence]

Gate type	Examples	What it controls
GrowthBook/feature flag	`GrowthBook`, `Z$("...")`, many `tengu_*` keys	Experiments, staged rollout, runtime feature defaults.
Environment kill switch	`DISABLE_GROWTHBOOK`, `CLAUDE_CODE_DISABLE_CRON`, telemetry/update/context UI env vars	Coarse process-level enable/disable decisions.
Managed policy/settings	`disableRemoteControl`, `disableAllHooks`, `disableAgentView`, `disableSkillShellExecution`, `cleanupPeriodDays`	Organization/admin and persisted configuration controls.
CLI flag	`--debug`, `--debug-file`, `--add-trace-attribute`, `--no-session-persistence`, `--agents`	Per-invocation behavior.
Provider/env selector	`CLAUDE_CODE_USE_BEDROCK`, `CLAUDE_CODE_USE_VERTEX`, `CLAUDE_CODE_USE_FOUNDRY`, `CLAUDE_CODE_USE_ANTHROPIC_AWS`, `CLAUDE_CODE_USE_MANTLE`	Provider/auth/reporting paths.

High-signal feature-gate families

The table groups source-visible keys by nearby behavior. It does not claim every opaque tengu_* name is fully decoded.

Family	Source-visible gates	Interpreted scope
Remote / bridge / CCR	`tengu_ccr_bridge`, `tengu_remote_backend`, `tengu_bridge_repl_v2_cse_shim_enabled`, `tengu_bridge_attestation_enforce`, `tengu_bridge_attestation_enforce_config`, `tengu_ccr_v2_send_events_cli`, `tengu_bridge_requires_action_details`, `tengu_bridge_system_init`, `CLAUDE_CODE_REMOTE`, `disableRemoteControl`	Remote Control, bridge transport, attestation, event forwarding.
Scheduled tasks / Kairos cron	`tengu_kairos_cron`, `tengu_kairos_cron_durable`, `tengu_kairos_loop_dynamic`, `tengu_kairos_loop_persistent`, `tengu_kairos_loop_prompt`, `tengu_kairos_push_notifications`, `tengu_kairos_input_needed_push`, `CLAUDE_CODE_DISABLE_CRON`	Cron/scheduled prompt feature family and autonomous-loop behavior.
Agents / background agents	`tengu_auto_background_agents`, `tengu_agent_list_attach`, `tengu_mcp_subagent_prompt`, `tengu_slim_subagent_claudemd`, `CLAUDE_AGENT_SDK_DISABLE_BUILTIN_AGENTS`, `CLAUDE_CODE_DISABLE_AGENT_VIEW`	Agent UI, background agents, subagent prompt/context behavior.
Auto-mode / permission automation	`tengu_auto_mode_config`, `tengu_disable_bypass_permissions_mode`, `tengu_auto_notice_once`, policy `defaultMode=auto`	Auto-mode defaults, consent, permission automation.
Tool/runtime security	`tengu_streaming_tool_execution2`, `tengu_harbor_permissions`, `tengu_destructive_command_warning`, `tengu_bash_allowlist_strip_all`, `CLAUDE_CODE_DISABLE_ADVISOR_TOOL`, `CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL`	Tool execution mode, warnings, advisory/permission behavior.
MCP/plugins/skills	`tengu_mcp_directory_visibility`, `tengu_mcp_directory_bff`, `tengu_mcp_singleton_unwrap`, `tengu_skills_dashboard_enabled`, `tengu_plugin_official_mkt_git_fallback`, `CLAUDE_CODE_PLUGIN_PREFER_HTTPS`, `CLAUDE_CODE_PLUGIN_USE_ZIP_CACHE`, `CLAUDE_CODE_SYNC_PLUGIN_INSTALL`	MCP discovery, plugin install/update, skills UI.
Context/model behavior	`CLAUDE_CODE_DISABLE_1M_CONTEXT`, `DISABLE_COMPACT`, `DISABLE_INTERLEAVED_THINKING`, `USE_API_CONTEXT_MANAGEMENT`, `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS`, `tengu_prompt_cache_1h_config`, `tengu_prompt_cache_diagnostics`	Context window, compaction, thinking, prompt cache, beta flags.
Web/search/fetch adjacent	`tengu_tool_search_unsupported_models`, `/api/web/domain_info?domain=`	Web/domain metadata and model support guardrails.
UI/terminal behavior	`CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN`, `CLAUDE_CODE_NO_FLICKER`, `CLAUDE_CODE_DISABLE_MOUSE`, `CLAUDE_CODE_FORCE_SYNC_OUTPUT`, `CLAUDE_CODE_ACCESSIBILITY`, `CLAUDE_CODE_DISABLE_TERMINAL_TITLE`	Terminal rendering and accessibility behavior.
Updates	`DISABLE_UPDATES`, `DISABLE_AUTOUPDATER`, `FORCE_AUTOUPDATE_PLUGINS`, `auto-update` settings	Native/plugin updater behavior.
Telemetry/diagnostics	`CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC`, `DISABLE_TELEMETRY`, `DO_NOT_TRACK`, `DISABLE_ERROR_REPORTING`, `DISABLE_GROWTHBOOK`, `OTEL_LOG_TOOL_DETAILS`, `OTEL_LOG_TOOL_CONTENT`, `OTEL_LOG_USER_PROMPTS`	Observability, analytics, error reporting, feature-evaluation fetching.

Relationship to sessions and agents

flowchart TD
    Gates[Feature/env/policy gates] --> Session[Session envelope]
    Gates --> Agents[Agent/task scheduler]
    Gates --> Tools[Tool/security runtime]
    Gates --> Telemetry[Telemetry and tracing]
    Session --> Evidence[debug/telemetry evidence]
    Agents --> Evidence
    Tools --> Evidence

Runtime area	Gate interaction
Sessions/remote	Remote Control can be disabled by managed policy; bridge state and transcript mirrors emit observable frames.
Tools/permissions	Permission automation and streaming execution are feature-gated; denials can surface as stream frames and telemetry.
Agents/tasks	Background agents, subagent prompt shape, scheduled tasks, and auto-mode are behind feature/env/policy gates.
Scheduled tasks	`CLAUDE_CODE_DISABLE_CRON` disables cron; scheduled-task telemetry tracks missed/fire/expired behavior.
Hosted review/update	Hosted review preflight and native updater emit operational telemetry but do not own model turns.

Safe interpretation rules

Treat tengu_* as evidence of a gate or telemetry event, not a fully decoded feature name unless adjacent strings confirm behavior.
Prefer env/policy strings for hard claims, because they are usually descriptive and user/admin-facing.
Distinguish a gate from an exported event: feature gates decide behavior; telemetry/tracing reports behavior.
Use Telemetry and tracing for sink/export details.

Created and maintained by Yingting Huang.