feat(ai-manifest): add ECHIDNA call-protocol snippet (Package 8)

8-tool quick-reference + 3 JSON examples + CALL-PROTOCOL.adoc link.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

AI.a2ml

@@ -13,3 +13,27 @@
 ## Delivery Promises
 - Mention in summaries whether STATE, `contractiles/`, or `.bot_directives/` changed.
 - Keep this file in sync with the repository’s status; update it if the governance changes.
+
+## Calling ECHIDNA via BoJ
+
+All ECHIDNA invocations go through the `echidna-llm-mcp` BoJ cartridge.
+**Never call ECHIDNA directly — always go through BoJ.**
+
+| Tool | Description |
+|------|-------------|
+| `echidna_list_provers` | Discover all 105 provers with tier/category/complexity |
+| `echidna_prove` | Invoke a prover on proof content |
+| `echidna_verify` | Verify inline proof content (typed outcome) |
+| `echidna_verify_raw` | Direct binary invocation (EProver, CaDiCaL, SAT solvers) |
+| `echidna_suggest` | Neural tactic suggestions (Julia ML corpus-backed) |
+| `echidna_suggest_tactics` | Aspect-tag tactic suggestions — advisory only |
+| `echidna_search` | Keyword search over 66,674-proof corpus |
+| `echidna_session_create` | Start interactive tactic session |
+
+```json
+{ "tool": "echidna_list_provers", "args": {} }
+{ "tool": "echidna_prove", "args": { "prover": "Lean", "content": "theorem t : 1 + 1 = 2 := rfl" } }
+{ "tool": "echidna_suggest_tactics", "args": { "goal": "n + 0 = n", "prover": "Lean" } }
+```
+
+Full protocol: `boj-server/cartridges/echidna-llm-mcp/docs/CALL-PROTOCOL.adoc`