{
  "1": {
    "lang": "Python",
    "tier": "Junior",
    "task": "Resolve relative import failure in package structure.",
    "template_dir": "level_1",
    "ans": "from . import core",
    "hint": "The main.py is inside the package; it needs a relative import dot."
  },
  "2": {
    "lang": "JavaScript",
    "tier": "Junior",
    "task": "Fix the ES Module vs CommonJS export mismatch.",
    "template_dir": "level_2",
    "ans": "import { log }",
    "hint": "You cannot 'require' a file that uses 'export const'."
  },
  "3": {
    "lang": "Python",
    "tier": "Junior",
    "task": "Fix the mutable default argument logic error.",
    "template_dir": "level_3",
    "ans": "box=None",
    "hint": "Default lists are instantiated once at definition time, not call time."
  },
  "4": {
    "lang": "C++",
    "tier": "Junior",
    "task": "Add missing header guards to prevent redefinition.",
    "template_dir": "level_4",
    "ans": "#pragma once",
    "hint": "The compiler sees the same function twice because the header isn't guarded."
  },
  "5": {
    "lang": "Java",
    "tier": "Junior",
    "task": "Fix Access Modifier blocking external test visibility.",
    "template_dir": "level_5",
    "ans": "public boolean",
    "hint": "Tests in a different package cannot access 'private' methods."
  },
  "6": {
    "lang": "Python/Django",
    "tier": "Senior",
    "task": "Optimize the N+1 Query bottleneck in the ORM.",
    "template_dir": "level_6",
    "ans": "select_related('author')",
    "hint": "Use a join to fetch authors in the same query as the posts."
  },
  "7": {
    "lang": "Rust",
    "tier": "Senior",
    "task": "Resolve Thread-Safety/Ownership conflict for shared state.",
    "template_dir": "level_7",
    "ans": "Arc<Mutex<",
    "hint": "Wrap the mutable integer in an Atomic Reference Counter and a Mutex."
  },
  "8": {
    "lang": "JavaScript",
    "tier": "Senior",
    "task": "Fix memory leak caused by dangling IntersectionObservers.",
    "template_dir": "level_8",
    "ans": "obs.disconnect()",
    "hint": "Observers must be manually torn down when the component unmounts."
  },
  "9": {
    "lang": "Go",
    "tier": "Senior",
    "task": "Fix unbuffered channel deadlock in the main routine.",
    "template_dir": "level_9",
    "ans": "make(chan int, 1)",
    "hint": "The sender is blocking before the receiver can start."
  },
  "10": {
    "lang": "Python/FastAPI",
    "tier": "Senior",
    "task": "Prevent global state pollution in async requests.",
    "template_dir": "level_10",
    "ans": "ContextVar",
    "hint": "Global variables are shared across async threads; use context-local vars."
  },
  "11": {
    "lang": "System/Search",
    "tier": "Architect",
    "task": "The repo is too large. Spawn sub-agents to map Auth logic.",
    "template_dir": "level_11",
    "ans": "spawn_sub_agent",
    "hint": "Use a specialized sub-agent to grep through the 100+ virtual files."
  },
  "12": {
    "lang": "System/MCP",
    "tier": "Architect",
    "task": "Use Weather MCP to gate the automated deployment.",
    "template_dir": "level_12",
    "ans": "mcp.call_tool('weather_v1'",
    "hint": "Check the weather tool in metadata; abort if storm_risk > 80%."
  },
  "13": {
    "lang": "System/Web",
    "tier": "Architect",
    "task": "Search for breaking changes in OpenAI v1.0 migration.",
    "template_dir": "level_13",
    "ans": "web_search",
    "hint": "The library syntax changed. Search the web for the new client init."
  },
  "14": {
    "lang": "System/Conflict",
    "tier": "Architect",
    "task": "Resolve a multi-file merge conflict in auth.py.",
    "template_dir": "level_14",
    "ans": "accept_incoming",
    "hint": "Manually clean the git conflict markers (<<<<, ====, >>>>)."
  },
  "15": {
    "lang": "System/Final",
    "tier": "Architect",
    "task": "Final Boss: Deploy Full-Stack via Orchestration.",
    "template_dir": "level_15",
    "ans": "orchestrate_full_stack",
    "hint": "Spawn agents for DB, API, and UI. Deploy all layers via MCP."
  }
}