What happened.

The Cardano Wallet Deep-Link Signing proposal has been assigned CIP number 186, with its directory renamed to CIP-0186. The cited commit records that the proposal was accepted as a Candidate and addresses CPS-0010.

The proposal describes an OS URL-handling wire protocol through which native mobile dApps can invoke CIP-30 operations, including signTx and signData, on an installed wallet. Its stated design avoids a relay server, WebView, QR flow, or WebSocket connection.

Why it matters.

For wallet and dApp builders, CIP-186 provides a candidate standard for a relay-free mobile wallet-connect path. The recorded work also includes reference implementations for an Aegis dApp and Yuti wallet, a public dApp-side SDK, and a 58-vector conformance suite.

The source says the specification was hardened against transaction-body-substitution and witness-injection classes. That makes the conformance material relevant for teams evaluating whether separate implementations handle the protocol consistently.

What to watch next.

The important next receipt is implementation evidence from wallets and dApps beyond the referenced examples, along with any subsequent standards-track progress. Candidate status is a proposal-stage milestone, not evidence that the standard has been ratified or broadly adopted.

What to watch

Watch for named wallet and dApp implementations, conformance results, and any later CIP status change beyond Candidate.

Sources and limits

Upstream references and independent checks

Digest dated 2026-08-05 · upstream model claude-sonnet-4-6. Direct links are matched to all 1 upstream source IDs.

  1. 1
    CIP-0186? | Cardano Wallet Deep-Link Signing (#1189)Direct upstream source · d8074378798b313d0108b36aae042c89526085c3

This Research brief was generated by Terra from a dated upstream research digest. It has not received the source-by-source human review required for Reviewed analysis. Material limit: This brief is based on one primary CIP repository commit from a dev-only, single-source feed; it does not establish ratification, wallet adoption, or a timeline for broad support.