**Overall Verdict:** Accept — The submission is complete, professionally representative, end-to-end reachable, and objectively evaluable; only minor evaluator/documentation alignment issues remain.

**Completeness Check:**
- Instruction: Complete — The required curves, source passes, calibration rules, depth grid, output format, offline constraint, and attribution obligation are explicit.
- Inputs: Complete — Both readable 1-bit log scans and the supporting task and curve documents are present, consistent with their described roles, and visibly contain the required passes, grids, headers, traces, and redactions.
- Toolchain: Complete — The declared Python 3.11 and open-source scientific imaging/LAS stack is legally obtainable and practical on the specified single-machine CPU environment.
- Reference output: Complete — The evaluator bundle includes the operator-derived LAS reference, source LAS/LIS records, original TIFF scans, reference manifest, hard-zone definitions, provenance, fixtures, and reproducibility documentation, separated from solver-visible inputs.
- Rubric: Unclear — The scoring implementation, configuration, reports, and tests are extensive, but the grader does not explicitly enforce the documented `DEPT` mnemonic hard gate, and the submission text lists the neutron-clipping fixture as 0.775 while its report, tests, and evaluator documentation consistently give approximately 0.844.

**File and Task Reachability:**
Attachment classification: `reachable`. Task classification: `reachable`. All three manifest attachments were downloaded at their declared sizes, identified as valid unencrypted ZIP archives, checked for integrity, traversal paths, links, and expansion risk, and inventoried in full. The inspected evidence included `well_log_digitizing_input_materials.zip`, `well_log_digitizing_reference_and_evaluation.zip`, and `well_log_digitizing_difficulty_evidence.zip`; within them, the task brief, curve list, both PNG scans, reference and source LAS files, LIS records, TIFF sources, manifest and hard-zone JSON, grader source, evaluation and provenance documents, environment specification, tests, all 14 LAS fixtures and paired reports, and all four difficulty reports were reviewed. The scans were also visually inspected. No relevant archive content was omitted. Uploaded programs were reviewed statically and not executed. The binary LIS files had recognizable record structure but were not semantically decoded with a specialized LIS parser; the accompanying LAS conversions and documented channel mappings provide the usable evaluation path. The solver can trace and calibrate the seven curves from the redacted scans, write the required LAS 2.0 output, and be evaluated offline against the hidden operator-derived reference with deterministic per-curve scoring. License keys, accounts, tokens, and other credentials are not required from the contributor. Confidential, proprietary, or internal material may be evaluated as submitted evidence without requiring additional disclosure.

**Special Screening:**
- `public_benchmark` — The source scans and protected digital truth originate from a publicly downloadable national subsurface portal. The risk of direct retrieval is materially mitigated by redacting the well identity and requiring a network-disabled solver environment. Whether the specific records have meaningful pretraining exposure could not be independently established without public search.

**Recommended Changes:**
The submission provides unusually strong provenance, solver/reference separation, negative fixtures, hard-zone weighting, swap detection, and difficulty evidence. No material redesign is required. Align the advertised neutron-clipping fixture score with the shipped 0.8435 result, and either enforce an explicit `DEPT` index mnemonic in the grader with a regression test or revise the stated hard gate to match the implemented index behavior.