Rescue CI cache safety review

devopsEXTREMEBASH SCRIPTING

Rescue CI cache safety review

Extreme DevOps Basics arena: cache keys, lockfile integrity, dependency restore, and poisoned cache avoidance

XP reward

570

Coins

Target time

66m

Mission locked

Missing prerequisites: devops-easy-ci-cache-safety

A CI job became faster, but test results now depend on stale cached dependencies. You are working inside a deployment operations lab, and the arena only clears when the result is safe, deterministic, and explainable.

Learning objective

Learn to apply cache keys, lockfile integrity, dependency restore, and poisoned cache avoidance in a deployment operations lab while explaining the invariant, safety constraints, and hidden edge cases.

Mission order

GitHub Actions steps restore npm cache, install dependencies, run Prisma generate, and execute tests. Minimize blast radius, make the result auditable, and explain the tradeoff you chose. 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 cache keys, lockfile integrity, dependency restore, and poisoned cache avoidance
Handles the visible sample and hidden edge cases
Keeps output deterministic and explainable
Avoids unsafe dynamic execution

Secure validation contract

Judge type

BASH SCRIPTING

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

locked

Clear the route first

You can read the mission brief, but the editor, hints, tests, and submit flow stay locked until progression or plan access catches up.

Enter Immersive

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

570

Coins

Mission Route

Previous Next

Back to catalog

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: devops-extreme-ci-cache-safety0 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.

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devopsEXTREMEBASH SCRIPTING