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meta() fetches the capability document, GET /api/meta: everything a client would otherwise hardcode. It needs no API key.
  • agents: every built-in, with runnable and reason, default_model and models (the picker’s list; a job still requires an explicit model), effort_support (level, binary or none) and default_effort, version_pinnable and latest_version (null means not known right now), supports_config and presets.
  • agent_registration: the rules a registration must satisfy: name_pattern, the length and size caps, max_per_user, reserved_names, reserved_env_keys.
  • sandbox_providers: each provider’s sizing ceilings, its gpus block, and its refuses list; platform_constraints beside it holds what no provider runs. gpu_concurrency_cap is the fleet’s cap on GPU trials in flight.
  • managed_providers: the managed sandbox doors this deployment serves, a managed-agents fact.
  • network_modes: the three modes a task may declare.
  • statuses: the job, trial, import and dataset_version vocabularies, each with its terminal members.
  • analyze: the analyzer’s default_model, its reasoning_efforts, and each roster model’s default_reasoning_effort.
  • limits: job (n_concurrent_trials default and max, default_max_trial_spend_usd, default_max_retries, default_sandbox_provider, default_sizing, model_required, default_agent_timeout_sec, default_verifier_timeout_sec, default_timeout_multiplier, the effort vocabulary), compare (min_ids, max_ids), pagination (a default and max per collection kind), uploads (the one physical ceiling per archive kind with archive_bytes_source, the agent tarball and skill caps), dataset_names, and max_items_named_in_error_message, which is why details exists.
  • error_codes and import_warning_codes: the closed lists.
schema_version moves when a field changes meaning, never when a value changes. The response carries an ETag and Cache-Control: public, max-age=300, stale-while-revalidate=300; send the ETag back as If-None-Match and an unchanged document answers 304.
Also hosted().meta().