docs: M5d-2 gate count 1508 and OpenCode model id

The M5d-1 gate on straylight is 1508, so every M5d-2 expected count moves up by one.
OpenCode 1.15.10 serves Ornith as llama.cpp/ornith-1.5-35b-a3b.

Co-Authored-By: Grok 4.6 <noreply@x.ai>

docs/plans/M5d2/02-bxcore-tool-summary.md

@@ -139,14 +139,14 @@ become
 - [ ] **5. Check.** `git diff --stat` lists `crates/bxcore/src/log.rs`,
   `crates/loopd/src/baseline.rs`, `crates/loopd/tests/support/turn.rs`.
 - [ ] **6. Run the gate.** `cargo fmt --all`, then `make gate`, timeout 600000 ms. Last line
-  `gate: ok`. Test count **1517** (1511 before, plus 6).
+  `gate: ok`. Test count **1518** (1512 before, plus 6).
 - [ ] **7. Log and commit.** Task cell `M5d2/02-bxcore-tool-summary`. Stage with
   `git add crates/bxcore crates/loopd docs/implementer-log.md Cargo.lock`, then commit as
   `AGENTS.md` says.
 
 ## Done when
 
-- `make gate` prints `gate: ok` with 1517 tests.
+- `make gate` prints `gate: ok` with 1518 tests.
 - `git diff HEAD~1 --stat` lists only `crates/bxcore/src/log.rs`,
   `crates/bxcore/tests/tool_summary.rs`, `crates/loopd/src/baseline.rs`,
   `crates/loopd/tests/tool_summary_messages.rs`, `crates/loopd/tests/support/turn.rs` and the
@@ -155,7 +155,7 @@ become
 ## Stop and report if
 
 - The branch check fails; a "before" block is not found exactly once; step 2 differs; `cargo
-  check` warns; a test fails; the gate count is not 1517; you replay a summary as a `User` or
+  check` warns; a test fails; the gate count is not 1518; you replay a summary as a `User` or
   `Tool` message; you add `truncated`; you change `Setup::turn`'s return type.
 
 ## What the given tests pin