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{"t":6.198,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRSjx3VMJU33opDSUD","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_011pqf8mpNkKCsbBRRzVMBuK","name":"mcp__elide__run_snippet","input":{"code":"const fs=require('fs');for(const f of ['/tmp/order-summary/checkout.js','/tmp/order-summary/trace.js','/tmp/order-summary/src/main/kotlin/demo/Order.kt','/tmp/order-summary/src/test/kotlin/demo/OrderTest.kt','/tmp/order-summary/elide.pkl'])console.log('=== '+f+'\\n'+fs.readFileSync(f,'utf8'));","language":"js"},"caller":{"type":"direct"}}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:40.643Z","request_id":"req_011CgufRSR6fXZJUzFTsouSm","tool_use_meta":[{"id":"toolu_011pqf8mpNkKCsbBRRzVMBuK","display_name":"Run Snippet","server_display_name":"elide","tool_name":"run/snippet"}]}}
{"t":6.23,"event":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_011pqf8mpNkKCsbBRRzVMBuK","type":"tool_result","content":"{\"exitCode\":0,\"stdout\":\"=== /tmp/order-summary/checkout.js\\nfunction checkoutTotal(subtotal, shipping) {\\n  return subtotal + shipping;\\n}\\n\\nconsole.log(\\\"Checkout total:\\\", checkoutTotal(4200, \\\"500\\\"));\\n\\n=== /tmp/order-summary/trace.js\\ninsight.on(\\\"enter\\\", (ctx, frame) => {\\n  console.log(`${ctx.name}: subtotal=${frame.subtotal} (${typeof frame.subtotal}), shipping=${frame.shipping} (${typeof frame.shipping})`);\\n}, { roots: true, rootNameFilter: \\\"checkoutTotal\\\" });\\n\\ninsight.on(\\\"return\\\", (ctx, frame) => {\\n  const value = ctx.returnValue(frame);\\n  console.log(`Returned: ${value} (${typeof value})`);\\n}, { roots: true, rootNameFilter: \\\"checkoutTotal\\\" });\\n\\n=== /tmp/order-summary/src/main/kotlin/demo/Order.kt\\npackage demo\\n\\nimport kotlinx.serialization.Serializable\\nimport kotlinx.serialization.json.Json\\n\\n@Serializable\\ndata class Order(val items: List<Int>) {\\n  fun total() = items.sum()\\n}\\n\\nfun main() {\\n  val order = Json.decodeFromString<Order>(\\\"\\\"\\\"{\\\"items\\\":[2400,1800,800]}\\\"\\\"\\\")\\n  println(\\\"${order.items.size} items · ${order.total()} cents\\\")\\n}\\n\\n=== /tmp/order-summary/src/test/kotlin/demo/OrderTest.kt\\npackage demo\\n\\nimport kotlin.test.Test\\nimport kotlin.test.assertEquals\\n\\nclass OrderTest {\\n  @Test fun totalsEveryItem() = assertEquals(5000, Order(listOf(2400, 1800, 800)).total())\\n  @Test fun handlesAnEmptyOrder() = assertEquals(0, Order(emptyList()).total())\\n}\\n\\n=== /tmp/order-summary/elide.pkl\\namends \\\"elide:project.pkl\\\"\\n\\nname = \\\"order-summary\\\"\\njvm { main = \\\"demo.OrderKt\\\" }\\n\\n\",\"stderr\":\"\"}"}]},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:40.676Z","tool_use_result":{"content":"{\"exitCode\":0,\"stdout\":\"=== /tmp/order-summary/checkout.js\\nfunction checkoutTotal(subtotal, shipping) {\\n  return subtotal + shipping;\\n}\\n\\nconsole.log(\\\"Checkout total:\\\", checkoutTotal(4200, \\\"500\\\"));\\n\\n=== /tmp/order-summary/trace.js\\ninsight.on(\\\"enter\\\", (ctx, frame) => {\\n  console.log(`${ctx.name}: subtotal=${frame.subtotal} (${typeof frame.subtotal}), shipping=${frame.shipping} (${typeof frame.shipping})`);\\n}, { roots: true, rootNameFilter: \\\"checkoutTotal\\\" });\\n\\ninsight.on(\\\"return\\\", (ctx, frame) => {\\n  const value = ctx.returnValue(frame);\\n  console.log(`Returned: ${value} (${typeof value})`);\\n}, { roots: true, rootNameFilter: \\\"checkoutTotal\\\" });\\n\\n=== /tmp/order-summary/src/main/kotlin/demo/Order.kt\\npackage demo\\n\\nimport kotlinx.serialization.Serializable\\nimport kotlinx.serialization.json.Json\\n\\n@Serializable\\ndata class Order(val items: List<Int>) {\\n  fun total() = items.sum()\\n}\\n\\nfun main() {\\n  val order = Json.decodeFromString<Order>(\\\"\\\"\\\"{\\\"items\\\":[2400,1800,800]}\\\"\\\"\\\")\\n  println(\\\"${order.items.size} items · ${order.total()} cents\\\")\\n}\\n\\n=== /tmp/order-summary/src/test/kotlin/demo/OrderTest.kt\\npackage demo\\n\\nimport kotlin.test.Test\\nimport kotlin.test.assertEquals\\n\\nclass OrderTest {\\n  @Test fun totalsEveryItem() = assertEquals(5000, Order(listOf(2400, 1800, 800)).total())\\n  @Test fun handlesAnEmptyOrder() = assertEquals(0, Order(emptyList()).total())\\n}\\n\\n=== /tmp/order-summary/elide.pkl\\namends \\\"elide:project.pkl\\\"\\n\\nname = \\\"order-summary\\\"\\njvm { main = \\\"demo.OrderKt\\\" }\\n\\n\",\"stderr\":\"\"}","_meta":{"io.modelcontextprotocol/serverInfo":{"name":"elide","version":"1.6.3"}},"structuredContent":{"exitCode":0,"stdout":"=== /tmp/order-summary/checkout.js\nfunction checkoutTotal(subtotal, shipping) {\n  return subtotal + shipping;\n}\n\nconsole.log(\"Checkout total:\", checkoutTotal(4200, \"500\"));\n\n=== /tmp/order-summary/trace.js\ninsight.on(\"enter\", (ctx, frame) => {\n  console.log(`${ctx.name}: subtotal=${frame.subtotal} (${typeof frame.subtotal}), shipping=${frame.shipping} (${typeof frame.shipping})`);\n}, { roots: true, rootNameFilter: \"checkoutTotal\" });\n\ninsight.on(\"return\", (ctx, frame) => {\n  const value = ctx.returnValue(frame);\n  console.log(`Returned: ${value} (${typeof value})`);\n}, { roots: true, rootNameFilter: \"checkoutTotal\" });\n\n=== /tmp/order-summary/src/main/kotlin/demo/Order.kt\npackage demo\n\nimport kotlinx.serialization.Serializable\nimport kotlinx.serialization.json.Json\n\n@Serializable\ndata class Order(val items: List<Int>) {\n  fun total() = items.sum()\n}\n\nfun main() {\n  val order = Json.decodeFromString<Order>(\"\"\"{\"items\":[2400,1800,800]}\"\"\")\n  println(\"${order.items.size} items · ${order.total()} cents\")\n}\n\n=== /tmp/order-summary/src/test/kotlin/demo/OrderTest.kt\npackage demo\n\nimport kotlin.test.Test\nimport kotlin.test.assertEquals\n\nclass OrderTest {\n  @Test fun totalsEveryItem() = assertEquals(5000, Order(listOf(2400, 1800, 800)).total())\n  @Test fun handlesAnEmptyOrder() = assertEquals(0, Order(emptyList()).total())\n}\n\n=== /tmp/order-summary/elide.pkl\namends \"elide:project.pkl\"\n\nname = \"order-summary\"\njvm { main = \"demo.OrderKt\" }\n\n","stderr":""}},"tool_result_meta":[{"id":"toolu_011pqf8mpNkKCsbBRRzVMBuK","permission_decision":{"decision":"accept","source":"config","reason_type":"rule"}}]}}
{"t":7.45,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRXCpqyHrdh83468Jr","type":"message","role":"assistant","content":[{"type":"thinking","thinking":""}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:41.896Z","request_id":"req_011CgufRWzw9fyGYVh5XnVBH","thinking_duration_ms":618,"thinking_display":"updates"}}
{"t":7.687,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRXCpqyHrdh83468Jr","type":"message","role":"assistant","content":[{"type":"text","text":"The bug is visible in the source: `checkoutTotal(4200, \"500\")` passes shipping as a string. I'll confirm with the runtime and a trace."}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:42.132Z","request_id":"req_011CgufRWzw9fyGYVh5XnVBH"}}
{"t":8.054,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRXCpqyHrdh83468Jr","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01ScZ2U4rTwvwTUVW43zmQFf","name":"mcp__elide__insight_run","input":{"path":"/tmp/order-summary/checkout.js","insights":[{"code":"watch('checkoutTotal').args()","language":"js"},{"code":"watch('checkoutTotal').returns()","language":"js"}]},"caller":{"type":"direct"}}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:42.499Z","request_id":"req_011CgufRWzw9fyGYVh5XnVBH","tool_use_meta":[{"id":"toolu_01ScZ2U4rTwvwTUVW43zmQFf","display_name":"Insight Run","server_display_name":"elide","tool_name":"insight/run"}]}}
{"t":8.123,"event":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01ScZ2U4rTwvwTUVW43zmQFf","type":"tool_result","content":"{\"stdout\":\"Checkout total: 4200500\\n\",\"stderr\":\"\",\"exitCode\":0,\"insights\":[{\"fn\":\"checkoutTotal\",\"args\":[{\"call\":1,\"values\":{\"subtotal\":4200,\"shipping\":\"500\"}}],\"returns\":[{\"call\":1,\"value\":\"4200500\"}]}]}"}]},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:42.568Z","tool_use_result":{"content":"{\"stdout\":\"Checkout total: 4200500\\n\",\"stderr\":\"\",\"exitCode\":0,\"insights\":[{\"fn\":\"checkoutTotal\",\"args\":[{\"call\":1,\"values\":{\"subtotal\":4200,\"shipping\":\"500\"}}],\"returns\":[{\"call\":1,\"value\":\"4200500\"}]}]}","_meta":{"io.modelcontextprotocol/serverInfo":{"name":"elide","version":"1.6.3"}},"structuredContent":{"stdout":"Checkout total: 4200500\n","stderr":"","exitCode":0,"insights":[{"fn":"checkoutTotal","args":[{"call":1,"values":{"subtotal":4200,"shipping":"500"}}],"returns":[{"call":1,"value":"4200500"}]}]}},"tool_result_meta":[{"id":"toolu_01ScZ2U4rTwvwTUVW43zmQFf","permission_decision":{"decision":"accept","source":"config","reason_type":"rule"}}]}}
{"t":9.197,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRfHVsZDN6iz5XHncc","type":"message","role":"assistant","content":[{"type":"thinking","thinking":""}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:43.643Z","request_id":"req_011CgufRf57JAKrxooGY7KAL","thinking_duration_ms":430,"thinking_display":"updates"}}
{"t":11.063,"event":{"type":"assistant","message":{"model":"claude-haiku-5-5","id":"msg_011CgufRfHVsZDN6iz5XHncc","type":"message","role":"assistant","content":[{"type":"text","text":"The total is `4200500` because `shipping` arrives as the string `\"500\"`, so `+` concatenates instead of adding.\n\nThe trace, from `insight_run` on `checkout.js`:\n\n- `checkoutTotal` was called once with `{subtotal: 4200, shipping: \"500\"}`.\n- It returned `\"4200500\"`.\n\nThe cause is at the call site in `/tmp/order-summary/checkout.js:4`:\n\n```js\nconsole.log(\"Checkout total:\", checkoutTotal(4200, \"500\"));\n```\n\n`checkoutTotal` at `checkout.js:1` does `subtotal + shipping`. JavaScript treats `number + string` as string concatenation, so `4200 + \"500\"` gives `\"4200500\"`. With a numeric `500` it would return `4700`.\n\nFix options:\n\n1. Pass a number at the call site: `checkoutTotal(4200, 500)`. This is the smallest change.\n2. Also coerce inside the function, e.g. `return Number(subtotal) + Number(shipping);`, so a string from input or a config value can't break it again.\n\nI haven't edited anything. Tell me which you want and I'll apply it and rerun. I didn't run `trace.js`; it uses a different `insight.on(...)` API than the `insight_run` tool, so I used `insight_run` instead."}],"container":null,"stop_reason":null,"stop_sequence":null,"stop_details":null,"input_transformations":[],"diagnostics":null,"context_management":null},"parent_tool_use_id":null,"timestamp":"2026-11-10T17:44:45.509Z","request_id":"req_011CgufRf57JAKrxooGY7KAL"}}
{"t":11.07,"event":{"type":"result","subtype":"success","is_error":false,"num_turns":6,"duration_ms":8874,"result":"The total is `4200500` because `shipping` arrives as the string `\"500\"`, so `+` concatenates instead of adding.\n\nThe trace, from `insight_run` on `checkout.js`:\n\n- `checkoutTotal` was called once with `{subtotal: 4200, shipping: \"500\"}`.\n- It returned `\"4200500\"`.\n\nThe cause is at the call site in `/tmp/order-summary/checkout.js:4`:\n\n```js\nconsole.log(\"Checkout total:\", checkoutTotal(4200, \"500\"));\n```\n\n`checkoutTotal` at `checkout.js:1` does `subtotal + shipping`. JavaScript treats `number + string` as string concatenation, so `4200 + \"500\"` gives `\"4200500\"`. With a numeric `500` it would return `4700`.\n\nFix options:\n\n1. Pass a number at the call site: `checkoutTotal(4200, 500)`. This is the smallest change.\n2. Also coerce inside the function, e.g. `return Number(subtotal) + Number(shipping);`, so a string from input or a config value can't break it again.\n\nI haven't edited anything. Tell me which you want and I'll apply it and rerun. I didn't run `trace.js`; it uses a different `insight.on(...)` API than the `insight_run` tool, so I used `insight_run` instead."}}