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Build durable streams for real-time data subscriptions. iii-stream is deprecated (iii-stream) and will be removed in an upcoming release. Behavior is unchanged for now. Migration guide: https://iii.dev/docs/upgrading/migrate-from-streams

Spawn ephemeral microVMs and expose 14 sandbox::* triggers (lifecycle + filesystem) for isolated command execution and file ops.

Distributed key-value state management with reactive change triggers — registers the `state` trigger type and the `state::*` functions.

Durable function queues - registers the `durable:subscriber` trigger type and the queue/DLQ service functions.

Schedule functions with cron expressions - registers the `cron` trigger type.

OpenTelemetry-based traces, metrics, logs, alerts, and sampling.

Expose functions as HTTP endpoints — registers the `http` trigger type and serves matched routes.

Register, store, and watch typed configuration values for the engine.

One front door + provider protocol in front of every LLM provider.

Engine introspection, workers registry proxy, filesystem-backed skills, system prompts, and agent profiles, kit install and update with reviewed plans, plus function search ranked by the judge worker (falling back to local hybrid/lexical) with a conditional pre-generate hint.

Talk to PostgreSQL, MySQL, and SQLite from iii — query, execute, transactions, prepared statements, and change feeds.

Durable, reactive, branching store of typed conversation entries with six emitted trigger types.

Unix shell + filesystem worker — exec with denylist/timeout/output caps and background jobs; fs::ls|stat|mkdir|rm|chmod|mv|grep|sed|read|write with host jail, denylist, size caps, and sandbox-target forwarding

Turns a raw conversation history plus a target model into a model-ready context — token counting, function-result pruning, and history compaction.

OpenAI Responses provider worker with Chat Completions compatibility; implements provider::openai::stream and provider::openai::refresh_models behind llm-router.

Anthropic Messages API provider worker; implements provider::anthropic::stream and provider::anthropic::refresh_models behind llm-router.

Measure Harness capability, retain reproducible evidence, and expose the E2E dashboard.

A browser on the iii bus - shared Chromium with persistent, restorable tabs and incognito tabs. Navigate, act, read the page console, pick elements. Also parses HTML natively without a browser (browser::* - css/xpath/regex, element search, markdown).

Web console for iii — bundles the React UI and proxies the engine WebSocket on a single port.

DeepSeek Chat Completions provider worker; implements provider::deepseek::stream and provider::deepseek::refresh_models behind llm-router.