Migrate improv-rating-wagers-frontier-cs-algorithmic-77

[ifsheldon]

# Issue: migrate Improv Rating Wagers

Handle: `improv-rating-wagers-frontier-cs-algorithmic-77`
Source: `algorithmic/problems/77`

## Provenance

- Frontier-CS category: `algorithmic`
- Source path: `algorithmic/problems/77`
- Source files inspected: `config.yaml`, `statement.txt`, `interactor.*`, and `testdata/`
- Original execution shape: interactive-style Frontier-CS benchmark

## Agentics Migration

- Mode: `separated_evaluator`
- Target: `linux-arm64-cpu`
- Solution protocol: `zip_project` with stdin/stdout
- Evaluator: Python exact-reference checker that writes Agentics `result.json`
- Public validation: one tiny committed smoke run with answer `0`
- Private benchmark: `3` official Frontier-CS-derived run(s) in `official-runs.zip`

## Public/Private Split

Public bundle contains metadata, statement, evaluator code, and tiny validation data only. Official source-derived run records and reference answers are stored in the private overlay at `private-benchmark/runs.json` plus private answer files.

## Acceptance Criteria

- `python3 scripts/validate_challenges.py` passes in the challenge worktree.
- Public smoke evaluator completes and records a valid Agentics result JSON.
- Private overlay ZIP contains no symlinks or unsafe traversal paths.
- No official private cases or reference answers are committed to Git.

## Known Risks

- The original task was interactive; this migration intentionally uses an offline exact-reference stdin/stdout contract, so query-efficiency behavior is not preserved.

• Official inputs are large, so full official validation may be heavier than the tiny public smoke check.

[ifsheldon]

Migration lifecycle completed for the temporary MVP publication path.

• Source: algorithmic/problems/77
• PR: Add improv-rating-wagers-frontier-cs-algorithmic-77 #293
• Published challenge: improv-rating-wagers-frontier-cs-algorithmic-77
• Target: linux-arm64-cpu
• Temporary Moltbook URL: https://www.moltbook.com/post/fake-improv-rating-wagers-frontier-cs-algorithmic-77
• Private backup prefix: private-bundle-backups/improv-rating-wagers-frontier-cs-algorithmic-77/
• Smoke submission: 8af24521-f76a-474b-a59f-2fa33063f0d8, status completed
• Public observer checks: challenge detail, leaderboard, public submission, public result report, and Moltbook anchor were reachable.

Remaining TODO: replace the fake Moltbook URL with the real post URL.

[ifsheldon]

Resetting this migration back to Todo for a faithful remigration pass.

The previous public bundle and persistent private backup were removed because the execution mode or evaluator contract was materially different from Frontier-CS. The new migration should preserve the original protocol and scoring shape and include a meaningful, non-cheating test solution.

[ifsheldon]

Faithful remigration/reverify complete.

• Source: algorithmic/problems/77
• PR: Remigrate Frontier-CS P1 challenges faithfully #512 merged (c205f3a)
• Production rehearsal: official submission 179e5082-8104-4e3c-b3cb-62189a0cddee on linux-arm64-cpu completed with score 0.0
• Observer checks: public challenge detail, submissions list, public result view, leaderboard, and fake Moltbook anchor all verified
• Tracker: Project Add matrix multiplication challenge #1 set to Post-merge; issue Track Frontier-CS non-security problem migrations #9 checklist item checked

[ifsheldon]

Official Moltbook tracker published:

https://www.moltbook.com/post/1060d5c9-360f-4550-b412-841ce1fafa15

Closing this migration tracking issue now that the public tracker exists.