Artifacts: resolve real artifacts by reference

A reference contains only resolverId, artifactId, and an optional revision; the App resolver provides the real content.

defineArtifactCatalog(resolvers) returns a read-only catalog and an asynchronous resolve(reference,context). Empty identities, unknown resolverId values, and non-function resolvers are rejected. The reference is snapshotted first, and the resolver receives the same reference plus App/cancellation/diagnostics context; cancellation during the wait or after resolution is not returned as success.

An artifact ID or revision is not a file path, access permission, proof of content authenticity, or publication receipt. The resolver must check the current caller, the real saved state, version, and expiry, and return an App-defined Value. The Kit does not store files, create download endpoints, or guarantee that delivery to a user is possible from the reference alone.

Progressive examples for the same business case

First resolve one explicit in-memory artifact

Beginner · Node.js

TypeScript

import { Artifacts } from '@jangts/agent-core/kits/artifacts';
const content = new Map([['manual', { text: 'Agent Core 使用说明', revision: '1' }]]);
const artifacts = Artifacts.defineArtifactCatalog([
  { id: 'document', resolve(reference) { const value = content.get(reference.artifactId); if (!value) throw new Error('产物不存在'); return value; } },
]);
const result = await artifacts.resolve({ resolverId: 'document', artifactId: 'manual' }, { app: {}, signal: new AbortController().signal });
console.log(result.text);

JavaScript

import { Artifacts } from '@jangts/agent-core/kits/artifacts';
const content = new Map([['manual', { text: 'Agent Core 使用说明', revision: '1' }]]);
const artifacts = Artifacts.defineArtifactCatalog([
    { id: 'document', resolve(reference) { const value = content.get(reference.artifactId); if (!value)
            throw new Error('产物不存在'); return value; } },
]);
const result = await artifacts.resolve({ resolverId: 'document', artifactId: 'manual' }, { app: {}, signal: new AbortController().signal });
console.log(result.text);

Add real permission and revision verification to the same resolve

Configuration · Node.js

TypeScript

import { Artifacts } from '@jangts/agent-core/kits/artifacts';
type Value = { text: string; revision: string };
type App = { canRead: boolean; documents: Map<string, Value> };
const artifacts = Artifacts.defineArtifactCatalog<Value, App>([
  { id: 'document', async resolve(reference, { app, signal }) {
    signal.throwIfAborted();
    if (!app.canRead) throw new Error('没有产物读取权限');
    const value = app.documents.get(reference.artifactId);
    if (!value) throw new Error('产物不存在或已到期');
    if (reference.revision && reference.revision !== value.revision) throw new Error('产物版本已变化');
    return structuredClone(value);
  } },
]);
const app = { canRead: true, documents: new Map([['manual', { text: 'Agent Core 使用说明', revision: '1' }]]) };
console.log(await artifacts.resolve({ resolverId: 'document', artifactId: 'manual', revision: '1' }, { app, signal: new AbortController().signal }));

JavaScript

import { Artifacts } from '@jangts/agent-core/kits/artifacts';
const artifacts = Artifacts.defineArtifactCatalog([
    { id: 'document', async resolve(reference, { app, signal }) {
            signal.throwIfAborted();
            if (!app.canRead)
                throw new Error('没有产物读取权限');
            const value = app.documents.get(reference.artifactId);
            if (!value)
                throw new Error('产物不存在或已到期');
            if (reference.revision && reference.revision !== value.revision)
                throw new Error('产物版本已变化');
            return structuredClone(value);
        } },
]);
const app = { canRead: true, documents: new Map([['manual', { text: 'Agent Core 使用说明', revision: '1' }]]) };
console.log(await artifacts.resolve({ resolverId: 'document', artifactId: 'manual', revision: '1' }, { app, signal: new AbortController().signal }));

Policies & implementations

• Reference snapshot, resolver registration, and cancellation