fix(skippy): avoid duplicate lifecycle token handoff - #1202

crates/mesh-native-serving-plugin-host/src/lib.rs (1)

920-1044: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Add coverage for committed counts below prompt counts.

Lines 472-475 reject this input before generation-state lookup. Add a proposal test with committed_token_count < prompt_token_count and assert that the error contains "precedes prompt token count".

Proposed test

+    #[test]
+    fn proposal_rejects_committed_count_before_prompt_count() {
+        let (active, _) = test_support::fake_active_with_events(Duration::ZERO);
+        let error = active
+            .propose(
+                LinearProposalQuery::new(
+                    1,
+                    2,
+                    2,
+                    1,
+                    1,
+                    8,
+                    Instant::now() + Duration::from_millis(100),
+                )
+                .with_pending_token_ids(vec![4].into_boxed_slice()),
+            )
+            .unwrap_err();
+        assert!(error.to_string().contains("precedes prompt token count"));
+    }

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@crates/mesh-native-serving-plugin-host/src/lib.rs` around lines 920 - 1044,
Add a test alongside the existing proposal validation tests that initializes a
generation with a prompt token count higher than the query’s
committed_token_count, calls Active::propose, and asserts the returned error
contains "precedes prompt token count". Ensure the case exercises the early
count validation before generation-state lookup.