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token-broker-client

Brokered short-lived provider credentials client in matrx-frontend (`lib/api/broker/`). Use when browser code needs a provider realtime session, a direct provider call, an ephemeral token, or a provider API key in the browser or `NEXT_PUBLIC_*`. NOT for adding a new audience server-side (use aidream's token-broker).

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See how to install

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  • SKILL.md3.1 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

token-broker-client — consume brokered credentials

The primitive lives at lib/api/broker/ (contract: its FEATURE.md; cross-repo system of record: ../common-docs/systems/architecture/token-broker/FEATURE.md). It is complete — consume it; never hand-roll a mint call, credential cache, or gateway fetch.

Decision gate — does the server support the audience?

Check KNOWN_AUDIENCES in lib/api/broker/types.ts and the live minter registry (aidream services/token_broker/minters/).

  • Supported → consume through the primitive (below). Zero broker-infrastructure code.
  • NOT supported (new provider/capability) → STOP client-side. The system grows server-first: follow the global token-broker skill (~/.claude/skills/token-broker/SKILL.md) — one minter + one registry line in aidream — then consume here through the unchanged primitive. Never work around a missing audience with client-side key handling.

How to consume

import { brokeredFetch, resolveBrokeredTransport } from "@/lib/api/broker/transport";
import { useBrokeredCredential } from "@/lib/api/broker/hooks";

// Proxied audience (e.g. "anthropic") — provider-wire HTTP, streaming included:
const res = await brokeredFetch(
  { audience: "anthropic", tierPolicy: "none", model: "claude-sonnet-5" },
  "/v1/messages",
  { method: "POST", body: JSON.stringify(anthropicShapedBody) },
);

// Native audience (e.g. "openai_realtime") — connect directly per protocol:
const t = await resolveBrokeredTransport({ audience: "openai_realtime", tierPolicy: "none" });
if (t.mode === "native_ephemeral") connectRealtime(t.endpoint, t.token);

// Component that needs a continuously-fresh credential:
const { credential, status, error, refresh } = useBrokeredCredential(req);

Caching, in-flight dedup, refresh-ahead (<20% TTL), 401→one-re-mint, and sign-out clearing all happen inside the primitive — callers never manage credential lifetime.

Non-negotiables

  • tierPolicy is explicit at every callsite ("none" | "guest" | "mid"). Never add a default, wrapper-with-default, or omittable param.
  • Never persist or log a token. Memory only. Never render credential.token — mask it (debug UIs use useBrokerCacheSnapshot, masked).
  • Never hardcode a gateway/provider URL — credential.endpoint is the only source.
  • No provider key in client env (NEXT_PUBLIC_* or otherwise). Finding one is a defect: replace it with a broker audience (server-first).
  • 503 on mint = loud error ("broker unconfigured"), never a silent fallback auth path, never a retry loop.

Verify

Demo page /demos/token-broker (dev builds): mint per audience, cache inspector, live proxied Anthropic call, forced re-mint.

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