archetech / archon / 27889141113

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main: 92%

Pull #635

github

chore: add DIDComm Phase 0 spike (didcomm-node round-trip)

Self-contained, throwaway spike validating the DIDComm design doc's
build-vs-buy and curve decisions. Packs/unpacks DIDComm v2 envelopes
between two Archon-shaped DIDs via the didcomm-node library and the
DIDResolver/SecretsResolver adapter interfaces later phases will back
with the gatekeeper and wallet.

All three round-trips pass: anoncrypt (XC20P/ECDH-ES over X25519),
authcrypt (A256CBC-HS512/ECDH-1PU over X25519), and authcrypt+sign with
a secp256k1 key (ES256K) — confirming Archon's existing keys can sign
DIDComm as-is and only a new X25519 key-agreement key is required.

Not wired into the monorepo (root workspaces is packages/* only); runs
standalone via `npm ci && node spike.mjs` in spike/didcomm-phase0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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