archives-mig-rs-v4

Task gallery / SWE-Marathon / Version 1

Reference solution (oracle): Pass
No-op resistance check: Pass
QA verdict: taxonomy: Rejected: too-easy (screen 3/3, SEE-confirmed) -> v5 TODO; QA: Local Q
Aggregate eligibility: Excluded / other version

Quality exclusion

Known task defect recorded

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

The task

Implement THREE byte-exact archive-header readers in Rust — one crate, graded against the real references Reimplement, from scratch and in ONE pure-std Rust crate, three independent archive-metadata readers. Each reads an archive's entry headers only (it never extracts, decompresses, or interprets file payloads) and serialises them to canonical tagged-JSON. Every test case is graded differentially and byte-for-byte …

Excerpt only; not a complete executable task specification. Task ID task_2e1fdb07de4241b9 · 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)	3/3 · 100.0% [43.9%, 100.0%] · preliminary	3 / 3	0	GOOD_FAILURE: 0 BAD_FAILURE: 0 GOOD_SUCCESS: 3 BAD_SUCCESS: 0

Legacy evidence

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

Every recorded run

5 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_76a14763ed204447` oracle@@	Oct 13, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: — Turns: — Cost: —	Not publicly available
`trial_e7cb16f08a61487f` nop@@	Oct 13, 2026 console	0 · valid	GOOD_FAILURE frozen-classifier	Tokens: — Turns: — Cost: —	Not publicly available
`trial_24fca9453a3542aa` Claude Opus 5 · default (unverified)	Oct 14, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 187,247 Turns: 102 Cost: $15.9016	Not publicly available
`trial_48de235a311e40e7` Claude Opus 5 · default (unverified)	Oct 14, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 135,621 Turns: 75 Cost: $10.6573	Not publicly available
`trial_981d1264c063401b` Claude Opus 5 · default (unverified)	Oct 14, 2026 console	1 · valid	GOOD_SUCCESS frozen-classifier	Tokens: 150,571 Turns: 84 Cost: $11.5626	Not publicly available