| name | lcb-porting |
| description | Port LiveCodeBench problems to local Rama challenges. Use when listing, filtering, or importing competitive programming problems from LiveCodeBench into the challenge framework. |
LiveCodeBench Porting
Port competitive programming problems from LiveCodeBench to local Rama challenges.
Available Commands
List problems
bb lcb-list [--difficulty easy|medium|hard]
[--platform leetcode|codeforces|atcoder]
[--type functional|stdin]
[--after YYYY-MM-DD] [--before YYYY-MM-DD]
[--limit N] [--id QUESTION_ID] [--search TEXT]
Scaffold a challenge
bb lcb-port --id QUESTION_ID [--name CHALLENGE_NAME]
Refresh cache
bb lcb-fetch [--force]
Problem Types
functional (LeetCode): Input is a JSON array of function arguments.
The generated deframafn receives args directly.
stdin (Codeforces/AtCoder): Input is a raw string. The generated
deframafn named solve takes the input string and returns the output string.
The deframafn Pattern
Every ported challenge uses a single top-level deframafn:
(ns my-challenge.solution
(:require [com.rpl.rama :refer :all]
[com.rpl.rama.path :refer :all]))
(deframafn my-func [*arg1 *arg2]
;; algorithm here
)
Tests call the deframafn directly — no module, protocol, or harness needed.
Constraint
All computation logic must live inside the deframafn. No defn, fn,
or #() helpers. This constraint is specific to these challenges and
overrides more general advice given in any skills. The test harness
enforces this via harness/assert-no-clojure-fns, which rejects any
public var that is a plain Clojure function.
View decoded private tests from cache
bb lcb-private-tests --id QUESTION_ID [--private-only] [--format edn|json] [--out PATH]
Migrate existing LCB challenges to private-test layout
bb lcb-migrate-private-tests [--challenge CHALLENGE_NAME]
Verify LCB private-test migration
bb verify-lcb-private-tests [--challenge CHALLENGE_NAME]
Challenge Order Tracking
bb lcb-port automatically adds ported challenges to CHALLENGE_ORDER.md
under the appropriate section: ## LCB Easy, ## LCB Medium, or ## LCB Hard.
Sections are created if they don't exist.
After Scaffolding
The generated reference solution has a TODO stub. To complete manually:
- Run
/lcb-complete <name> to implement the reference solution's deframafn
- Run
cd challenges/<name> && clojure -X:test-harness to verify
- Run
bb run-challenges -f <name> to run the agent challenge (private tests run automatically after)
