Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
All challenges
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Programming - Zero-Click Message Analysis
Mission
messages.ndjson is generated from the FLAG injected at startup. Order payloads by sequence and XOR-decrypt with 0x31 to recover the flag.
Hints
Hint 1 Show
Inspect messages.ndjson and identify the target record
Hint 2 Show
order payloads by sequence and XOR-decrypt with 0x31
Hint 3 Show
Verify that the reconstructed value has FLAG{...} format