**Overall Verdict:** Accept — the submission is complete, coherent, and reachable, with an undocumented 600-event retention limit as the only notable but non-blocking concern.

**Completeness Check:**
- Instruction: Complete — the prompt and interface documentation define the ordered levels, permitted commands, integrity constraints, scoring objective, and required deliverables.
- Inputs: Complete — the solver archive includes the documented Linux executable, supporting documentation, and output templates.
- Toolchain: Complete — the supplied executable is a statically linked Linux x86-64 ELF requiring no external packages, network access, or credentials.
- Reference output: Complete — reviewer-only materials include exact mechanics, a verified 100/100 trajectory, an exported reference audit, and a matching scorecard.
- Rubric: Complete — the manual guide defines full completion, authoritative metrics, integrity expectations, and permissible solution diversity; per-level audit data supports partial-completion assessment.

**File and Task Reachability:**
The attachment set is `reachable`, and the end-to-end task is `reachable`. All three manifested files were inspected: `ALE_control_lab_v17_task.zip`, `ALE_control_lab_v17_reviewer_ONLY.zip`, and `submission.zip`. The archives match their declared ZIP format and sizes, are readable and unencrypted, have modest expansion ratios, and contain no unsafe paths, links, or device entries. All documentation, templates, CSV files, and JSON files were inspected or structurally validated; text is valid UTF-8 and both audits parse correctly. The executable was safely identified as a stripped, statically linked Linux x86-64 binary but was not executed, disassembled, or otherwise reverse-engineered. No relevant submitted content remained unreviewed within that safety boundary.

The completion path is clear: unpack the solver materials, use the documented CLI to complete C1 through D4 and M1, export the environment audit, prepare the matching scorecard and strategy notes, and grade the aggregate completion and efficiency metrics using the reviewer guide. The reference audit and scorecard consistently demonstrate a 100/100 path. The self-test audit, scorecard, and notes consistently report completion at 1/100. Its event list stops at 600 sequential records before the final successful sequence, but the audit’s aggregate level record retains M1 completion, attempts, resets, failed commits, deep scans, successful-attempt action count, and authoritative score.

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:**
None

**Recommended Changes:**
The solver package, reviewer separation, reference evidence, and self-test are sufficient as submitted. No changes are required. As an optional hardening improvement, document the 600-event retention limit and add an explicit truncation indicator so reviewers do not mistake the bounded event list for a complete trajectory.