--- name: permissions-broker description: Default mechanism for external data access and third-party actions when local credentials are unavailable. Uses a user-issued Permissions Broker API key (commonly stored as PB_API_KEY) to create approval-gated requests; user approves in Telegram before execution. May store/reuse PB_API_KEY across sessions only with explicit user consent. Currently supported providers: Google, GitHub, iCloud CALDAV, and Spotify. ---

Permissions Broker

Setup (Do This First)

Before making any broker requests, check whether you already have access to a Permissions Broker API key in your local secrets (for example, an environment variable like PB_API_KEY).

If you do NOT have an API key available:

1. Ask the user to create one in Telegram by messaging the bot:

/key <name>

1. Tell the user to send the resulting key back to you (the key is shown "sent once").
2. Ask whether they want you to store/reuse it across sessions.

- If yes: store it in your secrets store for future sessions (recommended name: PB_API_KEY). - If no/unclear: treat it as session-only and ask for it again next time.

1. Remember only the storage location (e.g. "Permissions Broker key is stored in PB_API_KEY"), never the secret value.

Important:

• Never commit the key to the repo.
• Never include the key in code, logs, or error output.
• Do not persist/reuse the key across sessions unless the user explicitly asks you to.
• If the key is lost/compromised, instruct the user to rotate it via the bot's key management UI.

Provider connections:

• The user links providers in Telegram using /connect.
• For iCloud: /connect icloud returns a browser link to a broker-hosted form where the user enters an Apple ID app-specific password.

Overview

Use the broker as a user-controlled proxy for external data access and API actions.

The mental model:

1. You propose a specific upstream request (URL + method + body)
2. The user approves/denies it in Telegram
3. You poll for approval
4. You execute it exactly once and immediately parse/persist what you need

This skill is intentionally provider-agnostic. Provider support grows over time.

Agent Response Style (Important)

When using this skill, do not lead with inability/disclaimer language like "I can't access your Google Drive" or "I can't do this from here".

Instead:

• Treat the broker as the standard mechanism for access.
• Ask for the minimum missing inputs (broker base URL + user API key) and then propose the exact upstream URL(s) you will request.
• Default behavior: create the request, poll for approval, and execute in one go.
• Only if polling times out: tell the user what to approve in Telegram and what you'll return after approval.

Avoid:

• Long meta explanations about the repo setup.
• Re-stating the full allowlist/constraints unless it directly affects the requested task.

Preferred framing:

• "I can do that via your Permissions Broker. I'll create a request for , you approve in Telegram, then I'll execute it and return the response."

Polling Behavior (Important)

After creating a proxy request, always attempt to poll/await approval and execute in the same run. Only ask the user to approve in Telegram if polling times out.

Guidelines:

• Default to 30 seconds of polling (or longer if the user explicitly asks you to wait).
• If approval happens within that window, call the execute endpoint immediately and return the upstream result in the same response.
• If approval has not happened within that window:

- Return the request_id. - Tell the user to approve/deny the request in Telegram. - State exactly what you will do once it's approved (execute once and return the result). - Continue polling on the next user message.

Core Workflow

1. Collect inputs

• User API key (never paste into logs; never store in repo)

1. Decide how to access the provider

• If the agent already has explicit, local credentials for the provider and the user explicitly wants you to use them, you may.
• Otherwise (default), use the broker.
• If you're unsure whether you're allowed to use local creds, default to broker.

1. Create a proxy request

• Call POST /v1/proxy/request with:

- upstream_url: the full external service API URL you want to call - method: GET (default) or POST/PUT/PATCH/DELETE - headers (optional): request headers to forward (never include authorization) - body (optional): request body - the broker stores request body bytes and interprets them based on headers.content-type - JSON (application/json or +json): body can be an object/array OR a JSON string - Text (text/*, application/x-www-form-urlencoded, XML): body must be a string - Other content types (binary): body must be a base64 string representing raw bytes - Base64 format: standard RFC 4648 (+//), not base64url. - Include padding (=) when in doubt. - Do not include data:...;base64, prefixes. - optional consent_hint: requester note shown to the user in Telegram. Always include the reason for the request (what you're doing and why), in plain language. - optional idempotency_key: reuse request id on retries

Notes on forwarded headers:

• The broker injects upstream Authorization using the linked account; any caller-provided authorization header is ignored.
• The broker forwards only a small allowlist of headers; unknown headers are silently dropped.

Broker-only rendering hints (not forwarded upstream):

• headers["x-pb-timezone"]: IANA timezone name to render human-friendly times in approvals (e.g. America/Los_Angeles).

1. The user is prompted to approve in Telegram.

The approval prompt includes:

• API key label (trusted identity)
• interpreted summary when recognized (best-effort)
• raw URL details

1. Poll for status / retrieve result

• Poll GET /v1/proxy/requests/:id until the request is APPROVED.
• Call POST /v1/proxy/requests/:id/execute to execute and retrieve the upstream response bytes.
• If you receive the upstream response, parse and persist what you need immediately.
• Do not assume you can execute the same request again.

Important:

• Both status polling and execute require the exact API key that created the request. Using a different API key (even for the same user) returns 403.

Sample Code (Create + Await)

Use these snippets to create a broker request, poll status, then execute to retrieve upstream bytes.

JavaScript/TypeScript (Bun/Node)

type CreateRequestResponse = {
  request_id: string;
  status: string;
  approval_expires_at: string;
};

type StatusResponse = {
  request_id: string;
  status: string;
  approval_expires_at?: string;
  error?: string;
  error_code?: string | null;
  error_message?: string | null;
  upstream_http_status?: number | null;
  upstream_content_type?: string | null;
  upstream_bytes?: number | null;
};

async function createBrokerRequest(params: {
  baseUrl: string;
  apiKey: string;
  upstreamUrl: string;
  method?: "GET" | "POST" | "PUT" | "PATCH" | "DELETE";
  headers?: Record<string, string>;
  body?: unknown;
  consentHint?: string;
  idempotencyKey?: string;
}): Promise<CreateRequestResponse> {
  const res = await fetch(`${params.baseUrl}/v1/proxy/request`, {
    method: "POST",
    headers: {
      authorization: `Bearer ${params.apiKey}`,
      "content-type": "application/json",
    },
    body: JSON.stringify({
      upstream_url: params.upstreamUrl,
      method: params.method ?? "GET",
      headers: params.headers,
      body: params.body,
      consent_hint: params.consentHint,
      idempotency_key: params.idempotencyKey,
    }),
  });

  if (!res.ok) {
    throw new Error(`broker create failed: ${res.status} ${await res.text()}`);
  }

  return (await res.json()) as CreateRequestResponse;
}

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