{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`def` is Python — Mycel writes `fn name(args) { ... }`\n\nBroken program:\n```mycel\ndef f(x) { }\n```"},{"role":"assistant","content":"fn f(x: Int) -> Int {\n  return x * 2\n}\nprint(f(21))"}],"meta":{"lang":"Python","habit":"def f(x):","broken":"def f(x) { }","diagnostic":{"severity":"error","code":"E0101","message":"`def` is Python — Mycel writes `fn name(args) { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":4,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"42"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`elif` is Python — Mycel writes `else if`\n\nBroken program:\n```mycel\nif true { }\nelif false { }\n```"},{"role":"assistant","content":"let a = 15\nif a >= 18 {\n  print(\"adult\")\n} else if a >= 13 {\n  print(\"teen\")\n} else {\n  print(\"child\")\n}"}],"meta":{"lang":"Python","habit":"elif","broken":"if true { }\nelif false { }","diagnostic":{"severity":"error","code":"E0101","message":"`elif` is Python — Mycel writes `else if`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"teen"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`None` is Python — Mycel writes `nil`\n\nBroken program:\n```mycel\nlet x = None\n```"},{"role":"assistant","content":"let x: Int? = nil\nprint(x == nil)"}],"meta":{"lang":"Python","habit":"None","broken":"let x = None","diagnostic":{"severity":"error","code":"E0352","message":"`None` is Python — Mycel writes `nil`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":13,"why":"`None` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"true"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`True` is Python — Mycel writes `true`\n\nBroken program:\n```mycel\nlet x = True\n```"},{"role":"assistant","content":"let x = true\nlet y = false\nprint(x, y)"}],"meta":{"lang":"Python","habit":"True / False","broken":"let x = True","diagnostic":{"severity":"error","code":"E0352","message":"`True` is Python — Mycel writes `true`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":13,"why":"`True` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"true false"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\na `:` block is Python — Mycel blocks use `{ ... }`, e.g. `if x { ... }` / `else { ... }`\n\nBroken program:\n```mycel\nif true:\n  print(1)\n```"},{"role":"assistant","content":"if true {\n  print(1)\n}"}],"meta":{"lang":"Python","habit":"if x:","broken":"if true:\n  print(1)","diagnostic":{"severity":"error","code":"E0100","message":"a `:` block is Python — Mycel blocks use `{ ... }`, e.g. `if x { ... }` / `else { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":9,"why":"the parser needs `{` here to continue","suggestion":"insert `{`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`lambda` is Python — Mycel writes `x => x + 1`\n\nBroken program:\n```mycel\nlet f = lambda x: x + 1\n```"},{"role":"assistant","content":"let f = (x: Int) => x + 1\nprint(f(5))"}],"meta":{"lang":"Python","habit":"lambda x: x + 1","broken":"let f = lambda x: x + 1","diagnostic":{"severity":"error","code":"E0101","message":"`lambda` is Python — Mycel writes `x => x + 1`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":15,"suggestion":"arrow functions: `x => x + 1`, `(a, b) => a + b`"},"output":"6"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`raise` is Python — Mycel writes `throw`\n\nBroken program:\n```mycel\nraise Error(\"x\")\n```"},{"role":"assistant","content":"try {\n  throw Error(\"x\")\n} catch e {\n  print(e.message)\n}"}],"meta":{"lang":"Python","habit":"raise","broken":"raise Error(\"x\")","diagnostic":{"severity":"error","code":"E0101","message":"`raise` is Python — Mycel writes `throw`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"x"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`except` is Python — Mycel writes `catch e { ... }`\n\nBroken program:\n```mycel\ntry { print(1) }\nexcept e { }\n```"},{"role":"assistant","content":"try {\n  print(1)\n} catch e {\n  print(e.message)\n}"}],"meta":{"lang":"Python","habit":"except","broken":"try { print(1) }\nexcept e { }","diagnostic":{"severity":"error","code":"E0101","message":"`except` is Python — Mycel writes `catch e { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":7},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`===` is JavaScript — Mycel's `==` already compares values: write `==`\n\nBroken program:\n```mycel\nlet a = 1\nif a === 1 { }\n```"},{"role":"assistant","content":"let a = 1\nif a == 1 {\n  print(\"equal\")\n}"}],"meta":{"lang":"JavaScript","habit":"=== and !==","broken":"let a = 1\nif a === 1 { }","diagnostic":{"severity":"error","code":"E0100","message":"`===` is JavaScript — Mycel's `==` already compares values: write `==`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":8,"endLine":2,"endCol":9,"why":"a value (number, string, name, call, ...) is needed at this point","suggestion":"check for a missing operand or a stray symbol"},"output":"equal"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`function` is JavaScript — Mycel writes `fn name(args) { ... }`\n\nBroken program:\n```mycel\nfunction f() { }\n```"},{"role":"assistant","content":"fn f() -> Int {\n  return 42\n}\nprint(f())"}],"meta":{"lang":"JavaScript","habit":"function f() {}","broken":"function f() { }","diagnostic":{"severity":"error","code":"E0101","message":"`function` is JavaScript — Mycel writes `fn name(args) { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":9,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"42"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`const` is JavaScript — Mycel writes `let` (use `var` for a value that changes)\n\nBroken program:\n```mycel\nconst x = 1\n```"},{"role":"assistant","content":"let x = 1\nprint(x)"}],"meta":{"lang":"JavaScript","habit":"const x = 1","broken":"const x = 1","diagnostic":{"severity":"error","code":"E0101","message":"`const` is JavaScript — Mycel writes `let` (use `var` for a value that changes)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`console.log` is JavaScript — Mycel writes `print(...)`\n\nBroken program:\n```mycel\nconsole.log(\"hi\")\n```"},{"role":"assistant","content":"print(\"hi\")"}],"meta":{"lang":"JavaScript","habit":"console.log(x)","broken":"console.log(\"hi\")","diagnostic":{"severity":"error","code":"E0101","message":"`console.log` is JavaScript — Mycel writes `print(...)`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":8,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"hi"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`undefined` is JavaScript — Mycel writes `nil`\n\nBroken program:\n```mycel\nlet x = undefined\n```"},{"role":"assistant","content":"let x: Int? = nil\nprint(x == nil)"}],"meta":{"lang":"JavaScript","habit":"null / undefined","broken":"let x = undefined","diagnostic":{"severity":"error","code":"E0352","message":"`undefined` is JavaScript — Mycel writes `nil`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":18,"why":"`undefined` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"true"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`this` is JavaScript/Java — Mycel writes `self`\n\nBroken program:\n```mycel\nclass A {\n  var n: Int = 0\n  fn f() -> Int { return this.n }\n}\n```"},{"role":"assistant","content":"class A {\n  var n: Int = 0\n  fn f() -> Int { return self.n }\n}\nprint(A().f())"}],"meta":{"lang":"JavaScript","habit":"this.x","broken":"class A {\n  var n: Int = 0\n  fn f() -> Int { return this.n }\n}","diagnostic":{"severity":"error","code":"E0352","message":"`this` is JavaScript/Java — Mycel writes `self`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":3,"col":26,"endLine":3,"endCol":30,"why":"`this` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"0"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`new` is JavaScript/Java — Mycel writes `Foo(...)` without `new`\n\nBroken program:\n```mycel\nclass Foo { }\nlet f = new Foo()\n```"},{"role":"assistant","content":"class Foo { let n: Int = 10 }\nlet f = Foo()\nprint(f.n)"}],"meta":{"lang":"JavaScript","habit":"new Foo()","broken":"class Foo { }\nlet f = new Foo()","diagnostic":{"severity":"error","code":"E0101","message":"`new` is JavaScript/Java — Mycel writes `Foo(...)` without `new`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":9,"endLine":2,"endCol":12,"suggestion":"call the class like a function"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`switch` — Mycel writes `match value { pattern => result, ... }`\n\nBroken program:\n```mycel\nlet x = 1\nswitch x { }\n```"},{"role":"assistant","content":"let x = 1\nlet res = match x {\n  1 => \"one\"\n  _ => \"other\"\n}\nprint(res)"}],"meta":{"lang":"JavaScript","habit":"switch (x) { case 1: }","broken":"let x = 1\nswitch x { }","diagnostic":{"severity":"error","code":"E0101","message":"`switch` — Mycel writes `match value { pattern => result, ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"one"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`x++` — Mycel writes `x += 1`\n\nBroken program:\n```mycel\nvar i = 0\ni++\n```"},{"role":"assistant","content":"var i = 0\ni += 1\nprint(i)"}],"meta":{"lang":"JavaScript","habit":"x++","broken":"var i = 0\ni++","diagnostic":{"severity":"error","code":"E0100","message":"`x++` — Mycel writes `x += 1`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":3,"endLine":2,"endCol":4,"why":"a value (number, string, name, call, ...) is needed at this point","suggestion":"check for a missing operand or a stray symbol"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\nbacktick strings are JavaScript — Mycel writes f\"...{x}...\" (an f before the quote)\n\nBroken program:\n```mycel\nlet x = 1\nprint(`a ${x}`)\n```"},{"role":"assistant","content":"let x = 1\nprint(f\"a {x}\")"}],"meta":{"lang":"JavaScript","habit":"`template ${x}`","broken":"let x = 1\nprint(`a ${x}`)","diagnostic":{"severity":"error","code":"E0001","message":"backtick strings are JavaScript — Mycel writes f\"...{x}...\" (an f before the quote)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":7,"endLine":2,"endCol":8,"why":"Mycel strings use double quotes","suggestion":"write f\"a {x}\""},"output":"a 1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\nsingle quotes hold one character in Mycel — text uses double quotes (the JavaScript/Python 'text' habit)\n\nBroken program:\n```mycel\nimport fs from 'fs'\n```"},{"role":"assistant","content":"import std.fs\nprint(\"imported\")"}],"meta":{"lang":"JavaScript","habit":"import x from 'y'","broken":"import fs from 'fs'","diagnostic":{"severity":"error","code":"E0001","message":"single quotes hold one character in Mycel — text uses double quotes (the JavaScript/Python 'text' habit)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":16,"endLine":1,"endCol":18,"why":"a Char literal holds exactly one character","suggestion":"use \"fs\" for a String"},"output":"imported"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`number` is TypeScript — Mycel has `Int` (whole) and `Float` (decimal)\n\nBroken program:\n```mycel\nlet x: number = 5\n```"},{"role":"assistant","content":"let x: Int = 5\nprint(x)"}],"meta":{"lang":"TypeScript","habit":"number","broken":"let x: number = 5","diagnostic":{"severity":"error","code":"E0211","message":"`number` is TypeScript — Mycel has `Int` (whole) and `Float` (decimal)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":14,"why":"no type named `number` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"5"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`string` — Mycel writes `String`\n\nBroken program:\n```mycel\nlet x: string = \"a\"\n```"},{"role":"assistant","content":"let s: String = \"a\"\nlet b: Bool = true\nprint(s, b)"}],"meta":{"lang":"TypeScript","habit":"string / boolean","broken":"let x: string = \"a\"","diagnostic":{"severity":"error","code":"E0211","message":"`string` — Mycel writes `String`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":14,"why":"no type named `string` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"a true"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`any` is TypeScript — Mycel writes `Any`\n\nBroken program:\n```mycel\nlet x: any = 1\n```"},{"role":"assistant","content":"let x: Any = 1\nprint(x)"}],"meta":{"lang":"TypeScript","habit":"any / unknown","broken":"let x: any = 1","diagnostic":{"severity":"error","code":"E0211","message":"`any` is TypeScript — Mycel writes `Any`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":11,"why":"no type named `any` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`const` is JavaScript — Mycel writes `let` (use `var` for a value that changes)\n\nBroken program:\n```mycel\nconst x: number = 1\n```"},{"role":"assistant","content":"let x: Int = 1\nprint(x)"}],"meta":{"lang":"TypeScript","habit":"const / function","broken":"const x: number = 1","diagnostic":{"severity":"error","code":"E0101","message":"`const` is JavaScript — Mycel writes `let` (use `var` for a value that changes)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`T[]` is TypeScript/Java — Mycel writes a list type as `[T]`\n\nBroken program:\n```mycel\nlet x: number[] = []\n```"},{"role":"assistant","content":"let x: [Int] = [1, 2, 3]\nprint(x)"}],"meta":{"lang":"TypeScript","habit":"number[]","broken":"let x: number[] = []","diagnostic":{"severity":"error","code":"E0101","message":"`T[]` is TypeScript/Java — Mycel writes a list type as `[T]`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":14,"endLine":1,"endCol":15,"suggestion":"e.g. `let xs: [Int] = []`"},"output":"[1, 2, 3]"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`unknown` is TypeScript — Mycel writes `Any`\n\nBroken program:\n```mycel\nlet u: unknown = 1\n```"},{"role":"assistant","content":"let u: Any = 1\nprint(u)"}],"meta":{"lang":"TypeScript","habit":"unknown","broken":"let u: unknown = 1","diagnostic":{"severity":"error","code":"E0211","message":"`unknown` is TypeScript — Mycel writes `Any`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":15,"why":"no type named `unknown` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`number` is TypeScript — Mycel has `Int` (whole) and `Float` (decimal)\n\nBroken program:\n```mycel\nlet x = 1 as number\n```"},{"role":"assistant","content":"let x: Int = 1\nprint(x)"}],"meta":{"lang":"TypeScript","habit":"x as number","broken":"let x = 1 as number","diagnostic":{"severity":"error","code":"E0211","message":"`number` is TypeScript — Mycel has `Int` (whole) and `Float` (decimal)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":14,"endLine":1,"endCol":20,"why":"no type named `number` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`T[]` is TypeScript/Java — Mycel writes a list type as `[T]`\n\nBroken program:\n```mycel\nlet x: String[] = []\n```"},{"role":"assistant","content":"let x: [String] = [\"hello\"]\nprint(x[0])"}],"meta":{"lang":"TypeScript","habit":"string[]","broken":"let x: String[] = []","diagnostic":{"severity":"error","code":"E0101","message":"`T[]` is TypeScript/Java — Mycel writes a list type as `[T]`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":14,"endLine":1,"endCol":15,"suggestion":"e.g. `let xs: [Int] = []`"},"output":"hello"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`export` is JavaScript/TypeScript — Mycel writes `pub` before the declaration (`pub fn f() { ... }`)\n\nBroken program:\n```mycel\nexport function f() { }\n```"},{"role":"assistant","content":"pub fn f() -> Int { return 1 }\nprint(f())"}],"meta":{"lang":"TypeScript","habit":"export function","broken":"export function f() { }","diagnostic":{"severity":"error","code":"E0101","message":"`export` is JavaScript/TypeScript — Mycel writes `pub` before the declaration (`pub fn f() { ... }`)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`System.out.println` is Java — Mycel writes `print(...)`\n\nBroken program:\n```mycel\nSystem.out.println(\"hi\")\n```"},{"role":"assistant","content":"print(\"hi\")"}],"meta":{"lang":"Java","habit":"System.out.println(x)","broken":"System.out.println(\"hi\")","diagnostic":{"severity":"error","code":"E0101","message":"`System.out.println` is Java — Mycel writes `print(...)`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"hi"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`public` is Java — Mycel writes `pub` (and no `static void main` is needed: just write statements)\n\nBroken program:\n```mycel\npublic static void main(String[] args) { }\n```"},{"role":"assistant","content":"print(\"Hello, Java developer!\")"}],"meta":{"lang":"Java","habit":"public static void main","broken":"public static void main(String[] args) { }","diagnostic":{"severity":"error","code":"E0101","message":"`public` is Java — Mycel writes `pub` (and no `static void main` is needed: just write statements)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"Hello, Java developer!"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`int` is Java/C — Mycel writes `let x: Int = 5` (or just `let x = 5`)\n\nBroken program:\n```mycel\nint x = 5;\n```"},{"role":"assistant","content":"let x: Int = 5\nprint(x)"}],"meta":{"lang":"Java","habit":"int x = 5;","broken":"int x = 5;","diagnostic":{"severity":"error","code":"E0101","message":"`int` is Java/C — Mycel writes `let x: Int = 5` (or just `let x = 5`)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":4,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"5"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`double` is Java/C — Mycel's decimal type is `Float`\n\nBroken program:\n```mycel\nlet x: double = 1.0\n```"},{"role":"assistant","content":"let x: Float = 1.0\nprint(x)"}],"meta":{"lang":"Java","habit":"String / double / boolean as types","broken":"let x: double = 1.0","diagnostic":{"severity":"error","code":"E0211","message":"`double` is Java/C — Mycel's decimal type is `Float`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":14,"why":"no type named `double` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1.0"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`new` is JavaScript/Java — Mycel writes `Foo(...)` without `new`\n\nBroken program:\n```mycel\nclass Foo { }\nlet f = new Foo()\n```"},{"role":"assistant","content":"class Foo { let n: Int = 10 }\nlet f = Foo()\nprint(f.n)"}],"meta":{"lang":"Java","habit":"new Foo()","broken":"class Foo { }\nlet f = new Foo()","diagnostic":{"severity":"error","code":"E0101","message":"`new` is JavaScript/Java — Mycel writes `Foo(...)` without `new`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":9,"endLine":2,"endCol":12,"suggestion":"call the class like a function"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`void` is Java/C — Mycel needs no return type for a function that returns nothing\n\nBroken program:\n```mycel\nvoid f() { }\n```"},{"role":"assistant","content":"fn f() { print(\"void function\") }\nf()"}],"meta":{"lang":"Java","habit":"void f()","broken":"void f() { }","diagnostic":{"severity":"error","code":"E0101","message":"`void` is Java/C — Mycel needs no return type for a function that returns nothing","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"void function"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`null` is JavaScript/Java — Mycel writes `nil`\n\nBroken program:\n```mycel\nlet x = null\n```"},{"role":"assistant","content":"let x: Int? = nil\nprint(x == nil)"}],"meta":{"lang":"Java","habit":"null","broken":"let x = null","diagnostic":{"severity":"error","code":"E0352","message":"`null` is JavaScript/Java — Mycel writes `nil`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":13,"why":"`null` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"true"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`x++` — Mycel writes `x += 1`\n\nBroken program:\n```mycel\nvar i = 0\ni++\n```"},{"role":"assistant","content":"var i = 0\ni += 1\nprint(i)"}],"meta":{"lang":"Java","habit":"i++","broken":"var i = 0\ni++","diagnostic":{"severity":"error","code":"E0100","message":"`x++` — Mycel writes `x += 1`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":3,"endLine":2,"endCol":4,"why":"a value (number, string, name, call, ...) is needed at this point","suggestion":"check for a missing operand or a stray symbol"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`for (init; test; step)` is C/Java/JavaScript — Mycel writes `for i in 0..n { ... }`\n\nBroken program:\n```mycel\nfor (int i = 0; i < 3; i++) { }\n```"},{"role":"assistant","content":"for i in 0..3 {\n  print(i)\n}"}],"meta":{"lang":"Java","habit":"for (int i = 0; ...; i++)","broken":"for (int i = 0; i < 3; i++) { }","diagnostic":{"severity":"error","code":"E0101","message":"`for (init; test; step)` is C/Java/JavaScript — Mycel writes `for i in 0..n { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":5,"endLine":1,"endCol":16,"suggestion":"`for i in 0..10 { }` counts 0 to 9; `for x in items { }` walks a list"},"output":"0\n1\n2"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`extends` is Java/TypeScript — Mycel writes `class Name: Base, Interface { ... }`\n\nBroken program:\n```mycel\nclass A { }\nclass B extends A { }\n```"},{"role":"assistant","content":"class A { fn f() -> Int => 1 }\nclass B: A { }\nprint(B().f())"}],"meta":{"lang":"Java","habit":"extends / implements","broken":"class A { }\nclass B extends A { }","diagnostic":{"severity":"error","code":"E0101","message":"`extends` is Java/TypeScript — Mycel writes `class Name: Base, Interface { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":9,"endLine":2,"endCol":16,"suggestion":"put a `:` after the name, then the base class and interfaces"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`:=` is Go — Mycel writes `let x = value` (or `x = value` to change a `var`)\n\nBroken program:\n```mycel\nx := 5\n```"},{"role":"assistant","content":"let x = 5\nprint(x)"}],"meta":{"lang":"Go","habit":"x := 5","broken":"x := 5","diagnostic":{"severity":"error","code":"E0100","message":"`:=` is Go — Mycel writes `let x = value` (or `x = value` to change a `var`)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":3,"endLine":1,"endCol":4,"why":"statements are separated by a newline or `;`","suggestion":"put the next statement on its own line"},"output":"5"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`func` is Go/Swift — Mycel writes `fn name(args) { ... }`\n\nBroken program:\n```mycel\nfunc f() { }\n```"},{"role":"assistant","content":"fn f() -> String { return \"go\" }\nprint(f())"}],"meta":{"lang":"Go","habit":"func f() {}","broken":"func f() { }","diagnostic":{"severity":"error","code":"E0101","message":"`func` is Go/Swift — Mycel writes `fn name(args) { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"go"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`fmt.Println` is Go — Mycel writes `print(...)`\n\nBroken program:\n```mycel\nfmt.Println(\"hi\")\n```"},{"role":"assistant","content":"print(\"hi\")"}],"meta":{"lang":"Go","habit":"fmt.Println(x)","broken":"fmt.Println(\"hi\")","diagnostic":{"severity":"error","code":"E0101","message":"`fmt.Println` is Go — Mycel writes `print(...)`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":4,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"hi"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`var name Type` is Go — in Mycel the type follows a colon: `var x: int = ...`\n\nBroken program:\n```mycel\nvar x int = 1\n```"},{"role":"assistant","content":"var x: Int = 1\nprint(x)"}],"meta":{"lang":"Go","habit":"var x int","broken":"var x int = 1","diagnostic":{"severity":"error","code":"E0101","message":"`var name Type` is Go — in Mycel the type follows a colon: `var x: int = ...`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":7,"endLine":1,"endCol":10,"suggestion":"write `name: Type`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`switch` — Mycel writes `match value { pattern => result, ... }`\n\nBroken program:\n```mycel\nlet x = 1\nswitch x { }\n```"},{"role":"assistant","content":"let x = 1\nlet res = match x { 1 => \"one\", _ => \"other\" }\nprint(res)"}],"meta":{"lang":"Go","habit":"switch x { case 1: }","broken":"let x = 1\nswitch x { }","diagnostic":{"severity":"error","code":"E0101","message":"`switch` — Mycel writes `match value { pattern => result, ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"one"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`x++` — Mycel writes `x += 1`\n\nBroken program:\n```mycel\nvar i = 0\ni++\n```"},{"role":"assistant","content":"var i = 0\ni += 1\nprint(i)"}],"meta":{"lang":"Go","habit":"x++","broken":"var i = 0\ni++","diagnostic":{"severity":"error","code":"E0100","message":"`x++` — Mycel writes `x += 1`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":3,"endLine":2,"endCol":4,"why":"a value (number, string, name, call, ...) is needed at this point","suggestion":"check for a missing operand or a stray symbol"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`go` is Go — Mycel writes `spawn`\n\nBroken program:\n```mycel\nfn f() { }\ngo f()\n```"},{"role":"assistant","content":"async fn f() -> Int { return 1 }\nspawn f()\nprint(\"spawned\")"}],"meta":{"lang":"Go","habit":"go f()","broken":"fn f() { }\ngo f()","diagnostic":{"severity":"error","code":"E0101","message":"`go` is Go — Mycel writes `spawn`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":3,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"spawned"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`defer` is Go/Swift — Mycel puts cleanup in `try { ... } finally { ... }`\n\nBroken program:\n```mycel\nfn f() { }\ndefer f()\n```"},{"role":"assistant","content":"fn f() { print(\"cleanup\") }\ntry {\n  print(\"working\")\n} finally {\n  f()\n}"}],"meta":{"lang":"Go","habit":"defer f()","broken":"fn f() { }\ndefer f()","diagnostic":{"severity":"error","code":"E0101","message":"`defer` is Go/Swift — Mycel puts cleanup in `try { ... } finally { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"working\ncleanup"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`package` is Go/Java — a Mycel file is a module; no package line is needed\n\nBroken program:\n```mycel\npackage main\n```"},{"role":"assistant","content":"print(\"No package line needed in Mycel\")"}],"meta":{"lang":"Go","habit":"package main","broken":"package main","diagnostic":{"severity":"error","code":"E0101","message":"`package` is Go/Java — a Mycel file is a module; no package line is needed","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":8,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"No package line needed in Mycel"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`float64` is Go — Mycel's decimal type is `Float`\n\nBroken program:\n```mycel\nlet x: float64 = 1.0\n```"},{"role":"assistant","content":"let x: Float = 1.0\nprint(x)"}],"meta":{"lang":"Go","habit":"int / string / float64 / bool types","broken":"let x: float64 = 1.0","diagnostic":{"severity":"error","code":"E0211","message":"`float64` is Go — Mycel's decimal type is `Float`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":15,"why":"no type named `float64` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1.0"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`let mut` is Rust — Mycel writes `var`\n\nBroken program:\n```mycel\nlet mut x = 5\n```"},{"role":"assistant","content":"var x = 5\nx += 1\nprint(x)"}],"meta":{"lang":"Rust","habit":"let mut x = 5","broken":"let mut x = 5","diagnostic":{"severity":"error","code":"E0101","message":"`let mut` is Rust — Mycel writes `var`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":5,"endLine":1,"endCol":8,"why":"`let` is fixed once set; `var` can change","suggestion":"write `var x = ...`"},"output":"6"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`println` — Mycel writes `print(...)`\n\nBroken program:\n```mycel\nprintln!(\"hi\")\n```"},{"role":"assistant","content":"print(\"hi\")"}],"meta":{"lang":"Rust","habit":"println!(\"{}\", x)","broken":"println!(\"hi\")","diagnostic":{"severity":"error","code":"E0352","message":"`println` — Mycel writes `print(...)`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":8,"why":"`println` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"hi"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`None` is Python — Mycel writes `nil`\n\nBroken program:\n```mycel\nlet x = None\n```"},{"role":"assistant","content":"let x: Int? = nil\nprint(x == nil)"}],"meta":{"lang":"Rust","habit":"None","broken":"let x = None","diagnostic":{"severity":"error","code":"E0352","message":"`None` is Python — Mycel writes `nil`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":13,"why":"`None` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"true"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`i32` is Rust — Mycel's whole-number type is `Int`\n\nBroken program:\n```mycel\nlet x: i32 = 5\n```"},{"role":"assistant","content":"let x: Int = 5\nprint(x)"}],"meta":{"lang":"Rust","habit":"i32 / u64 / f64 / usize","broken":"let x: i32 = 5","diagnostic":{"severity":"error","code":"E0211","message":"`i32` is Rust — Mycel's whole-number type is `Int`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":11,"why":"no type named `i32` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"5"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`impl` is Rust — Mycel puts methods inside the class, or in `extend Name { ... }`\n\nBroken program:\n```mycel\nstruct Foo { }\nimpl Foo { }\n```"},{"role":"assistant","content":"class Foo {\n  fn method() -> String => \"mycel puts methods in class\"\n}\nprint(Foo().method())"}],"meta":{"lang":"Rust","habit":"impl Foo { }","broken":"struct Foo { }\nimpl Foo { }","diagnostic":{"severity":"error","code":"E0101","message":"`impl` is Rust — Mycel puts methods inside the class, or in `extend Name { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"mycel puts methods in class"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`vec![...]` is Rust — Mycel writes a list as `[1, 2]`\n\nBroken program:\n```mycel\nlet v = vec![1]\n```"},{"role":"assistant","content":"let v = [1, 2]\nprint(v)"}],"meta":{"lang":"Rust","habit":"vec![1, 2]","broken":"let v = vec![1]","diagnostic":{"severity":"error","code":"E0352","message":"`vec![...]` is Rust — Mycel writes a list as `[1, 2]`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":9,"endLine":1,"endCol":12,"why":"`vec` is not defined in Mycel","suggestion":"see `mycel help habits`"},"output":"[1, 2]"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`::` is Rust/C++ — Mycel writes `.` (`String.from`, `Color.Red`)\n\nBroken program:\n```mycel\nlet s = String::from(\"a\")\n```"},{"role":"assistant","content":"class MathUtils {\n  static fn double(x: Int) -> Int => x * 2\n}\nprint(MathUtils.double(5))"}],"meta":{"lang":"Rust","habit":"Type::method","broken":"let s = String::from(\"a\")","diagnostic":{"severity":"error","code":"E0100","message":"`::` is Rust/C++ — Mycel writes `.` (`String.from`, `Color.Red`)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":15,"endLine":1,"endCol":16,"why":"statements are separated by a newline or `;`","suggestion":"put the next statement on its own line"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`loop` is Rust — Mycel writes `while true { ... }`\n\nBroken program:\n```mycel\nloop { }\n```"},{"role":"assistant","content":"var count = 0\nwhile true {\n  count += 1\n  if count >= 3 { break }\n}\nprint(count)"}],"meta":{"lang":"Rust","habit":"loop { }","broken":"loop { }","diagnostic":{"severity":"error","code":"E0101","message":"`loop` is Rust — Mycel writes `while true { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"3"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`&` types are Rust/Go/C — Mycel has no references or pointers: values are passed as they are (text is `String`)\n\nBroken program:\n```mycel\nlet x: &str = \"a\"\n```"},{"role":"assistant","content":"let x: String = \"a\"\nprint(x)"}],"meta":{"lang":"Rust","habit":"let x: &str","broken":"let x: &str = \"a\"","diagnostic":{"severity":"error","code":"E0101","message":"`&` types are Rust/Go/C — Mycel has no references or pointers: values are passed as they are (text is `String`)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":9,"suggestion":"write the plain type, e.g. `String`"},"output":"a"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`func` is Go/Swift — Mycel writes `fn name(args) { ... }`\n\nBroken program:\n```mycel\nfunc f() -> Int { return 1 }\n```"},{"role":"assistant","content":"fn f() -> Int { return 1 }\nprint(f())"}],"meta":{"lang":"Swift","habit":"func f() -> Int","broken":"func f() -> Int { return 1 }","diagnostic":{"severity":"error","code":"E0101","message":"`func` is Go/Swift — Mycel writes `fn name(args) { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":5,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`\\(x)` is Swift — Mycel writes f\"...{x}...\" (an f before the quote)\n\nBroken program:\n```mycel\nlet x = 1\nprint(\"v \\(x)\")\n```"},{"role":"assistant","content":"let x = 1\nprint(f\"v {x}\")"}],"meta":{"lang":"Swift","habit":"\"\\(x)\" interpolation","broken":"let x = 1\nprint(\"v \\(x)\")","diagnostic":{"severity":"error","code":"E0001","message":"`\\(x)` is Swift — Mycel writes f\"...{x}...\" (an f before the quote)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":10,"endLine":2,"endCol":12,"why":"string interpolation uses an f-string","suggestion":"write f\"v {x}\""},"output":"v 1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`guard` is Swift — Mycel writes `if x == nil { return }` or `if let v = x { ... }`\n\nBroken program:\n```mycel\nguard let x = nil else { return }\n```"},{"role":"assistant","content":"let x: Int? = 10\nif let v = x {\n  print(v)\n}"}],"meta":{"lang":"Swift","habit":"guard let x = y else { return }","broken":"guard let x = nil else { return }","diagnostic":{"severity":"error","code":"E0101","message":"`guard` is Swift — Mycel writes `if x == nil { return }` or `if let v = x { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`switch` — Mycel writes `match value { pattern => result, ... }`\n\nBroken program:\n```mycel\nlet x = 1\nswitch x { }\n```"},{"role":"assistant","content":"enum State { A, B }\nlet x = State.A\nlet res = match x { .A => \"a\", .B => \"b\" }\nprint(res)"}],"meta":{"lang":"Swift","habit":"switch x { case .a: }","broken":"let x = 1\nswitch x { }","diagnostic":{"severity":"error","code":"E0101","message":"`switch` — Mycel writes `match value { pattern => result, ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":2,"col":1,"endLine":2,"endCol":7,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"a"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`..<` is Swift — Mycel's `0..n` already excludes the end (`0..=n` includes it)\n\nBroken program:\n```mycel\nfor i in 0..<3 { }\n```"},{"role":"assistant","content":"for i in 0..3 {\n  write(f\"{i} \")\n}\nprint(\"\")"}],"meta":{"lang":"Swift","habit":"for i in 0..<n","broken":"for i in 0..<3 { }","diagnostic":{"severity":"error","code":"E0100","message":"`..<` is Swift — Mycel's `0..n` already excludes the end (`0..=n` includes it)","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":13,"endLine":1,"endCol":14,"why":"a value (number, string, name, call, ...) is needed at this point","suggestion":"check for a missing operand or a stray symbol"},"output":"0 1 2"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`extension` is Swift — Mycel writes `extend Name { ... }`\n\nBroken program:\n```mycel\nextension Int { }\n```"},{"role":"assistant","content":"extend Int {\n  fn double() -> Int => self * 2\n}\nprint(5.double())"}],"meta":{"lang":"Swift","habit":"extension Foo { }","broken":"extension Int { }","diagnostic":{"severity":"error","code":"E0101","message":"`extension` is Swift — Mycel writes `extend Name { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":10,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`defer` is Go/Swift — Mycel puts cleanup in `try { ... } finally { ... }`\n\nBroken program:\n```mycel\ndefer { }\n```"},{"role":"assistant","content":"try {\n  print(\"running\")\n} finally {\n  print(\"deferred cleanup\")\n}"}],"meta":{"lang":"Swift","habit":"defer","broken":"defer { }","diagnostic":{"severity":"error","code":"E0101","message":"`defer` is Go/Swift — Mycel puts cleanup in `try { ... } finally { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":1,"endLine":1,"endCol":6,"why":"this word comes from another language","suggestion":"see `mycel help habits`"},"output":"running\ndeferred cleanup"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`Character` is Swift — Mycel writes `Char`\n\nBroken program:\n```mycel\nlet c: Character = \"a\"\n```"},{"role":"assistant","content":"let c: Char = 'a'\nprint(c)"}],"meta":{"lang":"Swift","habit":"Character","broken":"let c: Character = \"a\"","diagnostic":{"severity":"error","code":"E0211","message":"`Character` is Swift — Mycel writes `Char`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":17,"why":"no type named `Character` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"a"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`Double` is Swift — Mycel's decimal type is `Float`\n\nBroken program:\n```mycel\nlet x: Double = 1.0\n```"},{"role":"assistant","content":"let x: Float = 1.0\nprint(x)"}],"meta":{"lang":"Swift","habit":"Double / String as types","broken":"let x: Double = 1.0","diagnostic":{"severity":"error","code":"E0211","message":"`Double` is Swift — Mycel's decimal type is `Float`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe.myc","line":1,"col":8,"endLine":1,"endCol":14,"why":"no type named `Double` exists in Mycel","suggestion":"see `mycel help habits`"},"output":"1.0"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\ntype mismatch: expected Int, found String\n\nBroken program:\n```mycel\nlet x: Int = \"not_a_number\"\nprint(x)\n```"},{"role":"assistant","content":"let x: Int = 42\nprint(x)"}],"meta":{"lang":"Mycel","habit":"type mismatch: string assigned to Int","broken":"let x: Int = \"not_a_number\"\nprint(x)","diagnostic":{"severity":"error","code":"E0300","message":"type mismatch: expected Int, found String","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":1,"col":14,"endLine":1,"endCol":28,"why":"the initial value has type String, but Int is required here"},"output":"42"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\ncannot assign to `count` because it is declared with `let`\n\nBroken program:\n```mycel\nlet count = 0\ncount += 1\nprint(count)\n```"},{"role":"assistant","content":"var count = 0\ncount += 1\nprint(count)"}],"meta":{"lang":"Mycel","habit":"reassigning an immutable let binding","broken":"let count = 0\ncount += 1\nprint(count)","diagnostic":{"severity":"error","code":"E0371","message":"cannot assign to `count` because it is declared with `let`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":2,"col":1,"endLine":2,"endCol":6,"suggestion":"declare it with `var`"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\nvariable `s` is never used\n\nBroken program:\n```mycel\nfn getScore() -> Int {\n  let s = 100\n}\nprint(getScore())\n```"},{"role":"assistant","content":"fn getScore() -> Int {\n  let s = 100\n  return s\n}\nprint(getScore())"}],"meta":{"lang":"Mycel","habit":"missing return statement in function","broken":"fn getScore() -> Int {\n  let s = 100\n}\nprint(getScore())","diagnostic":{"severity":"warning","code":"W0101","message":"variable `s` is never used","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":2,"col":7,"endLine":2,"endCol":8,"suggestion":"remove it, or rename it `_s` to silence this warning"},"output":"100"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\nexpected `)` to close the parenthesis, found `print`\n\nBroken program:\n```mycel\nlet val = (10 + (20 * 3)\nprint(val)\n```"},{"role":"assistant","content":"let val = (10 + (20 * 3))\nprint(val)"}],"meta":{"lang":"Mycel","habit":"unclosed parenthesis in expression","broken":"let val = (10 + (20 * 3)\nprint(val)","diagnostic":{"severity":"error","code":"E0100","message":"expected `)` to close the parenthesis, found `print`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":2,"col":1,"endLine":2,"endCol":6,"why":"the `(` (opened at line 1) is never closed","suggestion":"add `)`"},"output":"70"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\nthis match does not cover every case\n\nBroken program:\n```mycel\nenum Mode { Fast, Safe, Balanced }\nlet m = Mode.Fast\nlet res = match m {\n  .Fast => \"quick\"\n  .Safe => \"secure\"\n}\nprint(res)\n```"},{"role":"assistant","content":"enum Mode { Fast, Safe, Balanced }\nlet m = Mode.Fast\nlet res = match m {\n  .Fast => \"quick\"\n  .Safe => \"secure\"\n  .Balanced => \"normal\"\n}\nprint(res)"}],"meta":{"lang":"Mycel","habit":"non-exhaustive enum match","broken":"enum Mode { Fast, Safe, Balanced }\nlet m = Mode.Fast\nlet res = match m {\n  .Fast => \"quick\"\n  .Safe => \"secure\"\n}\nprint(res)","diagnostic":{"severity":"error","code":"E0460","message":"this match does not cover every case","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":3,"col":11,"endLine":6,"endCol":2,"why":"not handled: Mode.Balanced","suggestion":"add arms for Mode.Balanced, or a catch-all `_ => ...`"},"output":"quick"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n`greet` overrides a method of Base and must be marked `override`\n\nBroken program:\n```mycel\nclass Base { fn greet() -> String => \"hello\" }\nclass Sub: Base { fn greet() -> String => \"hi\" }\nprint(Sub().greet())\n```"},{"role":"assistant","content":"class Base { fn greet() -> String => \"hello\" }\nclass Sub: Base { override fn greet() -> String => \"hi\" }\nprint(Sub().greet())"}],"meta":{"lang":"Mycel","habit":"missing override keyword on subclass method","broken":"class Base { fn greet() -> String => \"hello\" }\nclass Sub: Base { fn greet() -> String => \"hi\" }\nprint(Sub().greet())","diagnostic":{"severity":"error","code":"E0244","message":"`greet` overrides a method of Base and must be marked `override`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":2,"col":19,"endLine":2,"endCol":47,"why":"explicit `override` prevents accidentally replacing base behaviour","suggestion":"write `override fn greet(...)`"},"output":"hi"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\ncannot modify field `x` of struct Point\n\nBroken program:\n```mycel\nstruct Point { let x: Int, y: Int }\nvar p = Point(x: 1, y: 2)\np.x = 10\nprint(p.x)\n```"},{"role":"assistant","content":"struct Point { let x: Int, y: Int }\nvar p = Point(x: 1, y: 2)\np = p.with(x: 10)\nprint(p.x)"}],"meta":{"lang":"Mycel","habit":"attempting to mutate immutable struct property","broken":"struct Point { let x: Int, y: Int }\nvar p = Point(x: 1, y: 2)\np.x = 10\nprint(p.x)","diagnostic":{"severity":"error","code":"E0373","message":"cannot modify field `x` of struct Point","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":3,"col":1,"endLine":3,"endCol":4,"why":"structs are immutable values","suggestion":"build a modified copy: `value.with(x: ...)`, or make Point a class"},"output":"10"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\ntype mismatch: expected String, found Int\n\nBroken program:\n```mycel\nlet m = {\"name\": \"Alex\", \"age\": 25}\nprint(m[\"name\"])\n```"},{"role":"assistant","content":"let m: {String: Any} = {\"name\": \"Alex\", \"age\": 25}\nprint(m[\"name\"])"}],"meta":{"lang":"Mycel","habit":"heterogeneous map values without type annotation","broken":"let m = {\"name\": \"Alex\", \"age\": 25}\nprint(m[\"name\"])","diagnostic":{"severity":"error","code":"E0300","message":"type mismatch: expected String, found Int","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":1,"col":33,"endLine":1,"endCol":35,"why":"the map value has type Int, but String is required here","suggestion":"convert to text with \"${...}\" or str(value)"},"output":"Alex"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\n(Int, String) cannot be indexed\n\nBroken program:\n```mycel\nlet pair = (1, \"a\")\nprint(pair[0])\n```"},{"role":"assistant","content":"let pair = (1, \"a\")\nprint(pair.0)"}],"meta":{"lang":"Mycel","habit":"indexing a tuple with square brackets instead of dot notation","broken":"let pair = (1, \"a\")\nprint(pair[0])","diagnostic":{"severity":"error","code":"E0383","message":"(Int, String) cannot be indexed","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":2,"col":7,"endLine":2,"endCol":14,"suggestion":"only arrays, maps and Strings support `[...]`; define `operator [](i: Int) -> T` for your own types"},"output":"1"}}
{"messages":[{"role":"user","content":"Fix this Mycel program. It fails compiler checks with:\na `:` block is Python — Mycel blocks use `{ ... }`, e.g. `if x { ... }` / `else { ... }`\n\nBroken program:\n```mycel\nlet sq = (x: Int) { x * x }\nprint(sq(5))\n```"},{"role":"assistant","content":"let sq = (x: Int) => x * x\nprint(sq(5))"}],"meta":{"lang":"Mycel","habit":"missing arrow => in lambda parameter list","broken":"let sq = (x: Int) { x * x }\nprint(sq(5))","diagnostic":{"severity":"error","code":"E0100","message":"a `:` block is Python — Mycel blocks use `{ ... }`, e.g. `if x { ... }` / `else { ... }`","file":"/private/tmp/mycel_gen_fix_65mMaw/probe_extra.myc","line":1,"col":12,"endLine":1,"endCol":13,"why":"the `(` (opened at line 1) is never closed","suggestion":"add `)`"},"output":"25"}}