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import { Tool } from "@opencode-ai/core/tool/tool"
import { ApplicationTools } from "@opencode-ai/core/tool/application-tools"
import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
import { LayerNode } from "@opencode-ai/core/effect/layer-node"
import { SessionV2 } from "@opencode-ai/core/session"
import { SessionMessage } from "@opencode-ai/core/session/message"
import { AgentV2 } from "@opencode-ai/core/agent"
import { ToolRegistry } from "@opencode-ai/core/tool/registry"
import { executeTool, settleTool, toolDefinitions } from "./lib/tool"
import { ToolOutputStore } from "@opencode-ai/core/tool-output-store"
import { Tools } from "@opencode-ai/core/tool/tools"
import { Deferred, Effect, Exit, Fiber, Schema, Scope } from "effect"
import { testEffect } from "./lib/effect"
const it = testEffect(
AppNodeBuilder.build(LayerNode.group([ApplicationTools.node, ToolRegistry.node, ToolRegistry.toolsNode]), [
[ToolOutputStore.node, ToolOutputStore.nodeWithoutConfig],
]),
)
const sessionID = SessionV2.ID.make("ses_application_tool")
const agent = AgentV2.ID.make("build")
const assistantMessageID = SessionMessage.ID.make("msg_application_tool")
const contextual = (contexts: Tool.Context[]) =>
Tool.make({
description: "Read application context",
input: Schema.Struct({ query: Schema.String }),
output: Schema.Struct({ answer: Schema.String }),
execute: ({ query }, context) =>
Effect.sync(() => {
contexts.push(context)
return { answer: query.toUpperCase() }
}),
toModelOutput: ({ output }) => [
{ type: "text", text: output.answer },
{ type: "file", data: "aGVsbG8=", mime: "image/png", name: "result.png" },
],
})
describe("ApplicationTools", () => {
it.effect("keeps the Core carrier opaque and executes its single handler", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const contexts: Tool.Context[] = []
const tool = contextual(contexts)
expect(Object.keys(tool)).toEqual([])
yield* applications.register({ opaque: tool })
expect(
yield* executeTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-opaque", name: "opaque", input: { query: "once" } },
}),
).toEqual({
type: "content",
value: [
{ type: "text", text: "ONCE" },
{ type: "file", uri: "data:image/png;base64,aGVsbG8=", mime: "image/png", name: "result.png" },
],
})
expect(contexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-opaque" }])
}),
)
it.effect("exposes narrow scoped Location registration and validates names", () =>
Effect.gen(function* () {
const tools: Tools.Interface = yield* Tools.Service
const registry = yield* ToolRegistry.Service
const scope = yield* Scope.make()
yield* tools.register({ location_tool: contextual([]) }).pipe(Scope.provide(scope))
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["location_tool"])
expect(yield* Effect.flip(tools.register({ "invalid name": contextual([]) }))).toBeInstanceOf(
Tool.RegistrationError,
)
yield* Scope.close(scope, Exit.void)
expect(yield* toolDefinitions(registry)).toEqual([])
}),
)
it.effect("filters an application tool by its name without adding execution authorization", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const contexts: Tool.Context[] = []
yield* applications.register({ application_context: contextual(contexts) })
expect(
yield* toolDefinitions(registry, [{ action: "application_context", resource: "*", effect: "deny" }]),
).toEqual([])
expect(
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-denied", name: "application_context", input: { query: "hello" } },
}),
).toMatchObject({ result: { type: "content" } })
expect(contexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-denied" }])
}),
)
it.effect("advertises and executes a scoped application tool with Session context", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const contexts: Tool.Context[] = []
yield* applications.register({ application_context: contextual(contexts) })
expect(yield* toolDefinitions(registry)).toMatchObject([
{ name: "application_context", description: "Read application context" },
])
expect(
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-context", name: "application_context", input: { query: "hello" } },
}),
).toEqual({
result: {
type: "content",
value: [
{ type: "text", text: "HELLO" },
{ type: "file", uri: "data:image/png;base64,aGVsbG8=", mime: "image/png", name: "result.png" },
],
},
output: {
structured: { answer: "HELLO" },
content: [
{ type: "text", text: "HELLO" },
{ type: "file", uri: "data:image/png;base64,aGVsbG8=", mime: "image/png", name: "result.png" },
],
},
})
expect(contexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-context" }])
}),
)
it.effect("removes an application tool when its registration scope closes", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const scope = yield* Scope.make()
yield* applications.register({ temporary: contextual([]) }).pipe(Scope.provide(scope))
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["temporary"])
yield* Scope.close(scope, Exit.void)
expect(yield* toolDefinitions(registry)).toEqual([])
}),
)
it.effect("removes a tool before settling a call produced from an earlier definition", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const registrationScope = yield* Scope.make()
yield* applications.register({ contextual: contextual([]) }).pipe(Scope.provide(registrationScope))
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["contextual"])
yield* Scope.close(registrationScope, Exit.void)
expect(
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-removed", name: "contextual", input: { query: "hello" } },
}),
).toEqual({ result: { type: "error", value: "Unknown tool: contextual" } })
}),
)
it.effect("does not leak a registration into an already closed scope", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const scope = yield* Scope.make()
yield* Scope.close(scope, Exit.void)
yield* applications.register({ closed: contextual([]) }).pipe(Scope.provide(scope))
expect(yield* toolDefinitions(registry)).toEqual([])
}),
)
it.effect("preserves an interrupted application registration until its scope closes", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const scope = yield* Scope.make()
const registered = yield* Deferred.make<void>()
const fiber = yield* applications
.register({ interrupted: contextual([]) })
.pipe(
Effect.andThen(Deferred.succeed(registered, undefined)),
Effect.andThen(Effect.never),
Scope.provide(scope),
Effect.forkChild,
)
yield* Deferred.await(registered)
yield* Fiber.interrupt(fiber)
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["interrupted"])
yield* Scope.close(scope, Exit.void)
expect(yield* toolDefinitions(registry)).toEqual([])
}),
)
it.effect("captures the registered record before later State rebuilds", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const registered = { stable: contextual([]) }
yield* applications.register(registered)
Object.assign(registered, { late: contextual([]) })
yield* Effect.scoped(applications.register({ temporary: contextual([]) }))
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["stable"])
}),
)
it.effect("settles with the current same-name application tool and restores earlier registrations", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const firstContexts: Tool.Context[] = []
const secondContexts: Tool.Context[] = []
const scope = yield* Scope.make()
yield* applications.register({ contextual: contextual(firstContexts) })
expect((yield* toolDefinitions(registry)).map((tool) => tool.name)).toEqual(["contextual"])
yield* applications.register({ contextual: contextual(secondContexts) }).pipe(Scope.provide(scope))
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-second", name: "contextual", input: { query: "second" } },
})
yield* Scope.close(scope, Exit.void)
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-first", name: "contextual", input: { query: "first" } },
})
expect(secondContexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-second" }])
expect(firstContexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-first" }])
}),
)
it.effect("keeps the Location tool when an application tool has the same name", () =>
Effect.gen(function* () {
const applications = yield* ApplicationTools.Service
const registry = yield* ToolRegistry.Service
const locationContexts: Tool.Context[] = []
const applicationContexts: Tool.Context[] = []
const location = contextual(locationContexts)
yield* registry.register({ shared: location })
yield* applications.register({ shared: contextual(applicationContexts) })
expect(
(yield* toolDefinitions(registry, [{ action: "shared", resource: "*", effect: "deny" }])).map(
(definition) => definition.name,
),
).toEqual([])
expect(
yield* settleTool(registry, {
sessionID,
agent,
assistantMessageID,
call: { type: "tool-call", id: "call-shared", name: "shared", input: { query: "location" } },
}),
).toMatchObject({ result: { type: "content" } })
expect(locationContexts).toEqual([{ sessionID, agent, assistantMessageID, toolCallID: "call-shared" }])
expect(applicationContexts).toEqual([])
}),
)
})
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