cli-productivityEASYLINUX
Warm up with fzf command history recall
Easy CLI Productivity arena: interactive history search, previews, and safe command reuse
XP reward
90
Coins
8
Target time
12m
You need to rerun a long diagnostic command without accidentally replaying a destructive variant. You are working inside a high-speed terminal dojo, and the arena only clears when the result is safe, deterministic, and explainable.
Learning objective
Learn to apply interactive history search, previews, and safe command reuse in a high-speed terminal dojo while explaining the invariant, safety constraints, and hidden edge cases.
Mission order
Shell history includes kubectl, git, psql, curl, and prior cleanup commands. Implement the direct solution first, then document the one edge case that can break it. Submit the solution plus enough reasoning to pass hidden edge cases.Visible checks
uses safe command composition
Expected: deterministic command sequence
handles ordinary filenames
Expected: stable output
Clear requirements
- Demonstrates interactive history search, previews, and safe command reuse
- Handles the visible sample and hidden edge cases
- Keeps output deterministic and explainable
- Avoids destructive host commands
Secure validation contract
Judge type
LINUX
Complexity target
Linear scan over simulated files/log rows with deterministic output
Simulated lab
3 files/directories, allowed commands: awk, cat, cut, du, df, find, grep, head
Workspace
Terminal lab
Simulated secure terminalhost isolated
Test Results
Run the visible checks when your first pass is ready.
Clear Protocol
1Read the scenario and restate the expected output shape.
2Run visible checks before chasing hidden edge cases.
3Use Genie for one nudge if stuck, then explain the invariant.
4Submit only when the result is deterministic and safe.
Rewards
XP
90
Coins
8
Mission Route
Hints
Hints are metered and logged for No Hint Hero runs.
Genie Mentor Core
Hint protocol / contextual guardrails active
Progressive hints
Failed-test aware
Solution guarded
Mission: cli-productivity-easy-fzf-history0 attempts0 failed tests0 hints used
Progressive hint depth
Genie: Genie online. I use your mission, attempts, failed tests, hints, and path context to coach the next rep without dumping answers first.