ViteHub is still experimental. Expect bugs and breaking changes.

Official capabilities

Choose an official Capability by what the Agent needs to do.

ViteHub exports its built-in Capabilities from @vite-hub/agent/capabilities. Choose a Capability by what the Agent needs to do. Each linked page shows how to configure it, what the Agent receives, and how to verify it.

server/agents/support.ts

import {
  access,
  blob,
  browser,
  chat,
  chatSummary,
  title,
  db,
  email,
  fetch,
  git,
  gmail,
  inputCommands,
  kv,
  llmGate,
  llmRoute,
  mcp,
  memory,
  openapi,
  otlp,
  papercuts,
  progressSummary,
  rateLimit,
  repositoryHost,
  repositoryHostContext,
  sandbox,
  schedule,
  skills,
  subagents,
  transcribe,
  usage,
  cost,
  diagnostics,
  webSearch,
  workspaceShell,
} from 'vite-hub/agent/capabilities'

Catalog

Invocation

Ability	Capability	Use it when
Invocation access	`access()`	Narrow chat admission or Workspace access from trusted invocation identity.
Chat behavior	`chat()`	Start Agent Invocations from chat messages and manage Chat History.
Input commands	`inputCommands()`	Transform command-shaped user input before the Agent runs.
Subagents	`subagents()`	Delegate bounded work to named Agent Definitions through tools.

Workspace

Ability	Capability	Use it when
Browser automation	`browser()`	A Provider Agent needs headless browser guidance and the `agent-browser` CLI is installed.
Workspace files	`workspaceShell()`	Inspect or edit Workspace files, or run configured Workspace commands.
Git source history	`git()`	The Agent needs bounded Git source-history inspection or local Workspace Session git state selection.
Skills file	`skills()`	The Agent requires a Workspace skill file at invocation time.
Durable memory	`memory()`	The Agent needs scoped durable records across invocations.

Runtime primitives

Ability	Capability	Use it when
KV storage	`kv()`	The Agent needs scoped key-value read or edit tools.
Blob storage	`blob()`	The Agent needs scoped object read or edit tools.
Database	`db()`	The Agent needs guarded SQL query, schema, or mutation tools.
Email	`email()`	Send authorized plain-text messages through the configured Email primitive.
Sandbox execution	`sandbox()`	The Agent may run an allowlisted executable in an isolated runtime.
Schedules	`schedule()`	The Agent declares scheduled invocations or manages Runtime Schedules through tools.
OTLP telemetry	`otlp()`	Live Agent Invocation events and completed traces should be exported to an OpenTelemetry receiver.
Operational diagnostics	`diagnostics()`	Invocation outcomes and scoped runtime resource observations should go to an application-owned reporter.

External context

Ability	Capability	Use it when
Repository host	`repositoryHost()`	The Agent needs provider-hosted repository, Change Request, issue, comment, check, or status data through a configured Repository Host client.
Repository host context	`repositoryHostContext()`	Read issue or Change Request data identified by a trigger or host.
MCP servers	`mcp()`	Add tools from external MCP servers to the Agent.
Web search	`webSearch()`	The Agent needs model web search or normalized web search/read tools.
Fetch tools	`fetch()`	The Agent needs named HTTP tools for developer-approved endpoints.
OpenAPI tools	`openapi()`	The Agent needs a selected OpenAPI operation catalog exposed as bounded HTTP tools or a generated Capability CLI.
Transcription	`transcribe()`	Turn audio input into text before model execution.
Gmail	`gmail()`	Search Gmail or create unsent drafts through structured tools.

Decisions and output

Ability	Capability	Use it when
LLM routing	`llmRoute()`	Choose one developer-defined route with a model before the invocation.
LLM gate	`llmGate()`	Allow or reject a request with a model before the invocation.
Rate limit	`rateLimit()`	Consume a trusted invocation budget before the Agent runs.
Title	`title()`	Generate a title for Agent output, finish extensions, or Channel threads.
Chat summary	`chatSummary()`	Replace a summary command with a conversation summary.
Progress summary	`progressSummary()`	Summarize current reasoning and tool activity while an Agent streams.
Papercut reports	`papercuts()`	Report small runtime or developer-experience problems to application code.
Usage	`usage()`	Request provider usage metadata and expose a normalized Agent Usage Record.
Cost	`cost()`	Add exact and display-ready USD cost to Agent Usage Records.