tar-rust-rewrite · Syncvals

Task gallery / Software engineering / Version 1

Reference solution (oracle): Fail
No-op resistance check: Pass
QA verdict: Not recorded
Aggregate eligibility: Excluded / other version

Quality exclusion

Known task defect recorded
Reference solution fails

These per-version observations remain visible, but this version does not contribute to aggregate pass rates.

The task

Rewrite GNU tar in Rust (byte-exact, LCALL=C, TZ=UTC0) Reimplement the supported surface of GNU tar as an in-process Rust library. For every test case your output must be byte-for-byte identical to what GNU tar produces for the same option flags and inputs, under LCALL=C and TZ=UTC0. Everything is modelled purely in memory — you must never touch the real filesystem — so grading is deterministic. The crate lives at /…

Excerpt only; not a complete executable task specification. Task ID task_810901df76e9486f · version 1. Selection status: not fully recorded.

Results by model and effort

This exact task version only. Every rate is passes / valid runs with a Wilson 95% interval; n≤2 remains counts only. Macro aggregation does not apply within a single task. Baselines are summarized in the quality gates, not ranked. A passed no-op resistance check means that doing nothing did not solve the task.

Current evidence

Model / effort	Verifier result [95% Wilson]	Diagnostic labels / valid	HARNESS_ERROR · excluded	Outcome classes
Claude Opus 5 · default (unverified)	5/5 · 100.0% [56.6%, 100.0%]	5 / 5	0	GOOD_FAILURE: 0 BAD_FAILURE: 0 GOOD_SUCCESS: 5 BAD_SUCCESS: 0

Legacy evidence

Model / effort	Verifier result [95% Wilson]	Diagnostic labels / valid	HARNESS_ERROR · excluded	Outcome classes

Every recorded run

13 recorded trials, including controls. Diagnostic labels do not replace verifier reward. Labels and quality checks are source declarations, not independently attested here. Internal evidence remains private; a missing public URL is shown explicitly. Records with invalid or absent rewards are not scored.

Run / model	Date / source	Reward / eligibility	Diagnostic class / source	Resources	Evidence
`trial_11a262615b08439b` oracle@@	Oct 10, 2026 console	No reward · excludedno_reward	No diagnostic label No diagnostic source	Tokens: — Turns: — Cost: —	Not publicly available
`trial_a7e40ef9b7894d58` nop@@	Oct 10, 2026 console	No reward · excludedno_reward	No diagnostic label No diagnostic source	Tokens: — Turns: — Cost: —	Not publicly available
`trial_5970a9544b5d4afc` oracle@@	Oct 11, 2026 console	0 · valid	No diagnostic label derived	Tokens: — Turns: — Cost: —	Not publicly available
`trial_d69c4203e5824ee7` nop@@	Oct 11, 2026 console	0 · valid	No diagnostic label derived	Tokens: — Turns: — Cost: —	Not publicly available
`trial_7a120e70b7864130` oracle@@	Oct 11, 2026 console	0 · valid	No diagnostic label derived	Tokens: — Turns: — Cost: —	Not publicly available
`trial_f456300818f54370` nop@@	Oct 11, 2026 console	0 · valid	No diagnostic label derived	Tokens: — Turns: — Cost: —	Not publicly available
`trial_4213b97a8d8b4c3e` Claude Opus 5 · default (unverified)	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 149,310 Turns: 129 Cost: $16.1560	Not publicly available
`trial_659f008d4a804ae5` Claude Opus 5 · default (unverified)	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 160,333 Turns: 122 Cost: $16.4431	Not publicly available
`trial_b2be8fb583d446d2` Claude Opus 5 · default (unverified)	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 148,525 Turns: 111 Cost: $15.0514	Not publicly available
`trial_d03660bbcedd487a` Claude Opus 5 · default (unverified)	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 122,697 Turns: 90 Cost: $11.3808	Not publicly available
`trial_ff6735383e5a4aed` Claude Opus 5 · default (unverified)	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 140,221 Turns: 119 Cost: $13.9654	Not publicly available
`trial_47d1b119ea44442e` nop@@	Oct 11, 2026 console	0 · valid	GOOD_FAILURE frozen-classifier	Tokens: — Turns: — Cost: —	Not publicly available
`trial_e4accb7215c94cd6` oracle@@	Oct 11, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: — Turns: — Cost: —	Not publicly available