diff --git a/docs/standards/v0.3.3-working-doc.md b/docs/standards/v0.3.3-working-doc.md
index 636faa9..92feb95 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) | [`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` | authority | cryptographic | x402 #2334 `privacy_class_v0` (commit 9cd3e75) | [chopmob-cloud/30bcbc717c86493f737feb92c415ba07](https://gist.github.com/chopmob-cloud/30bcbc717c86493f737feb92c415ba07) | 🟡 PLACEHOLDER — 10/10 byte-match across 4 JCS impls |
 | 4 | `urn:nobulex:receipt` | continuity | behavioral | Nobulex AAIF (Arian, A2A #1786 + #1829) | TBD — Arian targeting PENDING-boundary cross-validation against argentum-core fixtures | 🟡 PLACEHOLDER |
 | 5 | `urn:observatory:eval` | continuity | behavioral | Dominion Observatory (vdineshk, A2A #1672) | live endpoint `dominion-observatory.sgdata.workers.dev/mcp` | 🟡 PLACEHOLDER |