feat: Add JSON schema definitions for coverage and trace artifacts in reachability benchmark

bench/reachability-benchmark/schemas/README.md

@@ -3,8 +3,11 @@
 - `case.schema.yaml` — case descriptor (language, sinks, deterministic build/test, environment, optional inline ground truth summary).
 - `entrypoints.schema.yaml` — declared entrypoints grouped by type (`http`, `cli`, `scheduled`, etc.).
 - `truth.schema.json` — ground-truth labels + evidence per sink (`reachable`/`unreachable`/`unknown`).
+- `coverage.schema.json` — coverage artifact emitted by oracle tests (lines covered or function-level coverage).
+- `trace.schema.json` — dynamic trace artifact (structured path or event log) proving reachability/unreachability.
 - `submission.schema.json` — submission format (tool/run metadata, per-sink predictions, explanations).
 - `examples/` — minimal valid examples for each schema.
+- `benchmark/schemas/benchmark-manifest.schema.json` — kit manifest with hashed artifacts, resource limits, and optional DSSE signatures.
 
 ## Validate quickly
 ```bash
@@ -15,6 +18,8 @@ python -m pip install -r ../tools/requirements.txt
 python ../tools/validate.py case examples/case.sample.yaml
 python ../tools/validate.py entrypoints examples/entrypoints.sample.yaml
 python ../tools/validate.py truth examples/truth.sample.json
+python ../tools/validate.py coverage ../cases/js/unsafe-eval/outputs/coverage.json
+python ../tools/validate.py trace ../cases/js/unsafe-eval/outputs/traces/traces.json
 python ../tools/validate.py submission examples/submission.sample.json
 
 # or validate everything in one shot

bench/reachability-benchmark/schemas/coverage.schema.json

@@ -0,0 +1,51 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://stellaops.org/benchmark/reachability/coverage.schema.json",
+  "title": "Reachability Benchmark Coverage Artifact",
+  "type": "object",
+  "oneOf": [
+    {
+      "required": ["files"],
+      "properties": {
+        "files": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "object",
+            "required": ["lines_covered", "lines_total"],
+            "properties": {
+              "lines_covered": {
+                "type": "array",
+                "items": { "type": "integer", "minimum": 1 }
+              },
+              "lines_total": { "type": "integer", "minimum": 1 }
+            },
+            "additionalProperties": false
+          }
+        }
+      },
+      "additionalProperties": false
+    },
+    {
+      "required": ["files"],
+      "properties": {
+        "files": {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "required": ["path", "coverage"],
+            "properties": {
+              "path": { "type": "string" },
+              "functions": {
+                "type": "array",
+                "items": { "type": "string" }
+              },
+              "coverage": { "type": "number", "minimum": 0, "maximum": 1 }
+            },
+            "additionalProperties": false
+          }
+        }
+      },
+      "additionalProperties": false
+    }
+  ]
+}

bench/reachability-benchmark/schemas/trace.schema.json

@@ -0,0 +1,42 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://stellaops.org/benchmark/reachability/trace.schema.json",
+  "title": "Reachability Benchmark Trace Artifact",
+  "type": "object",
+  "oneOf": [
+    {
+      "required": ["entry", "path", "sink"],
+      "properties": {
+        "entry": { "type": "string" },
+        "path": {
+          "type": "array",
+          "minItems": 1,
+          "items": { "type": "string" }
+        },
+        "sink": { "type": "string" },
+        "notes": { "type": "string" }
+      },
+      "additionalProperties": false
+    },
+    {
+      "required": ["events"],
+      "properties": {
+        "events": {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "required": ["path", "type"],
+            "properties": {
+              "path": { "type": "string" },
+              "type": { "type": "string" },
+              "at": { "type": "integer", "minimum": 0 }
+            },
+            "additionalProperties": false
+          }
+        },
+        "notes": { "type": "string" }
+      },
+      "additionalProperties": false
+    }
+  ]
+}