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sandbox-runner
Recursive sandboxing for 100+ iterations before human review
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
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Recursive sandboxing for 100+ iterations before human review
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
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| name | Sandbox Runner |
| description | Recursive sandboxing for 100+ iterations before human review |
Run solutions through recursive sandboxing, iterating up to 100 times before presenting to human.
"Let agents fail 100 times in simulation so humans see only the winning solution."
[Solution] → Sandbox → Test → Pass? → [Present to Human]
↑ │
└── No ──┘ (iterate, max 100x)
sandbox:
max_iterations: 100
early_exit_threshold: 0.95 # Confidence to stop early
checkpoint_every: 10 # Save state every N iterations
tests:
- unit: "npm run test"
- lint: "npm run lint"
- build: "npm run build"
success_criteria:
all_tests_pass: true
no_lint_errors: true
build_success: true
iteration:
number: 42
status: running | passed | failed
failures: ["test A", "test B"]
fixes_attempted: [...]
confidence: 0.72
Stop before 100 iterations if:
sandbox_result:
iterations_run: 47
final_status: passed | failed
solution:
code_changes: [...]
confidence: 0.89
iteration_log:
- iter: 1, status: failed, fixes: [...]
- iter: 2, status: failed, fixes: [...]
- iter: 47, status: passed
ready_for_hitl: true