feat(appkit): add agent plugin core and ToolProvider implementations#284
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feat(appkit): add agent plugin core and ToolProvider implementations#284MarioCadenas wants to merge 1 commit intoagent/2a-tool-types-mcpfrom
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This was referenced Apr 16, 2026
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Add the agent plugin with all supporting infrastructure:
- AgentPlugin class: routes, tool collection, SSE streaming, thread mgmt
- AgentEventTranslator: converts AgentEvent to OpenAI Responses API format
- InMemoryThreadStore: per-user conversation persistence
- Config-driven agents: frontmatter markdown files in config/agents/
- Layered system prompts: auto-generated base (guidelines + app context)
prepended to per-agent user prompt
- AgentDefinition union type: agents accept { adapter, systemPrompt }
- Auto-discovery: config files merged with code-defined agents per-name
- reloadAgents() export for future hot-reload support
- ToolProvider implementations for analytics, files, genie, lakebase
- Server plugin addExtension() for plugin-to-plugin route registration
Also add a shared defineTool() helper for ToolProvider plugins and refactor
the four built-in ToolProviders to use it:
- defineTool(): Zod-powered factory that pairs a schema with a typed handler
and optional ToolAnnotations. Names are supplied by the enclosing registry
key, so dotted names like `uploads.list` or `myspace.sendMessage` work
without any special-case dispatch code.
- executeFromRegistry(): generic dispatcher that looks up an entry by name,
validates args via safeParse, and returns an LLM-friendly error string on
failure rather than throwing.
- toolsFromRegistry(): derives the AgentToolDefinition[] from a registry,
generating JSON Schema from each entry's Zod schema.
- analytics, files, genie, lakebase: getAgentTools() / executeAgentTool()
now delegate to the shared helpers. Static plugins (analytics, lakebase)
declare the registry as a class field; dynamic plugins (files, genie)
build per-volume / per-space entries in the constructor after runtime
config is known.
Signed-off-by: MarioCadenas <MarioCadenas@users.noreply.github.com>
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Summary
PR 3 of 5 (2b) in the agent plugin stack.
AgentPluginclass: HTTP routes (/chat, /cancel, /threads, /invocations), tool collection from ToolProvider plugins + FunctionTool + MCP, SSE streaming via executeStream, thread managementAgentEventTranslator: stateful converter from internalAgentEventto OpenAI Responses APIResponseStreamEventwith sequence numbers and output indicesInMemoryThreadStore: per-user conversation persistence with nested MapToolProviderimplementations added to analytics, files, genie, and lakebase pluginsaddExtension()method for internal plugin-to-plugin route registrationPR Stack
Test plan