diff --git a/docs/standards/v0.3.3-working-doc.md b/docs/standards/v0.3.3-working-doc.md
index edd3686b..f1cb3b3a 100644
--- a/docs/standards/v0.3.3-working-doc.md
+++ b/docs/standards/v0.3.3-working-doc.md
@@ -74,7 +74,7 @@ Placeholder rows for maintainer PRs are marked `🟡 PLACEHOLDER` — please PR
 | # | URN namespace | claim_type | evidenceType | Canonical spec | Fixture link | Validation status |
 |---|---|---|---|---|---|---|
 | 1 | `urn:erc8004:identity` | identity | cryptographic | ERC-8004 (`agentgraph_bridge_erc8004` Day-1 MVP) | TBD | 🟡 PLACEHOLDER |
-| 2 | `urn:mycelium:trail` | continuity | observational | argentum-core (giskard09, A2A #1850) | `argentum-core/examples/conformance/` | 🟡 PLACEHOLDER — andysalvo 4/4 + AlgoVoi 4/4 reproductions standing |
+| 2 | `urn:mycelium:trail` | continuity | observational | [argentum-core `docs/spec/action-ref.md`](https://github.com/giskard09/argentum-core/blob/main/docs/spec/action-ref.md) (giskard09, A2A #1850) | [`argentum-core/examples/conformance/`](https://github.com/giskard09/argentum-core/tree/main/examples/conformance) | ✅ CONFIRMED — andysalvo 4/4 + AlgoVoi 4/4 + 3 vectors byte-match verified (JCS RFC 8785 + SHA-256) |
 | 3 | `urn:x402:audit-chain:<epoch_id>` | authority | cryptographic | x402-foundation/x402#2334 `privacy_class_v0` (settlement-retention anchor); JCS shared canonicalisation section v3 on x402 #2326 (`canon_version: "jcs-rfc8785-v1"`) | **AlgoVoi-controlled canonical upstream:** [`chopmob-cloud/algovoi-jcs-conformance-vectors`](https://github.com/chopmob-cloud/algovoi-jcs-conformance-vectors) (proxy-chain + multi-chain Ed25519 fixtures relocated there permanently 2026-05-24 per A2A #1829, after withdrawal of `aeoess/aps-conformance-suite#5+#6`). In-tree reproduction: [`tests/cross-impl/fixtures/`](https://github.com/agentgraph-co/agentgraph/tree/v0.3.3-cross-extension-matrix/tests/cross-impl/fixtures); reference resolver `/compliance/attestation audit_chain.head` (AlgoVoi). | ✅ ACCEPTED (AlgoVoi) — 53/53 + 37/37 pair-invariants across 5 JCS impls |
 | 4 | `urn:nobulex:receipt` | continuity | behavioral | Nobulex AAIF (Arian, A2A #1786 + #1829) — Ed25519 over JCS-canonical JSON + lowercase-hex SHA-256; `timestamp_ms` field alignment per x402 #2322 convergence | TBD — argentum-core PENDING-boundary cross-validation specimen incoming | ✅ ACCEPTED (Arian Gogani) — fixture PR pending specimen |
 | 5 | `urn:observatory:eval` | continuity | behavioral | Dominion Observatory (vdineshk, A2A #1672); observatory-conformance-v0.1 schema | Live: dominionobservatory.com/api/conformance?subject={x} (single server) + /api/conformance/vectors (5 reference vectors, byte-match validated) | ✅ ACCEPTED (vdineshk) — 22,500+ MCP servers in corpus; JCS RFC 8785 + lowercase-hex SHA-256; X-Digest-SHA256 header + body digest |