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MiniMax's proposed specification must preserve the original requirement before its resulting patch can be accepted.
MiniMax-M2.5’s model card describes a tendency to plan and write specifications before coding. For repair work, that plan is useful only when it preserves the actual requirement and leads to an accepted patch.
Read planning claims as a testable behavior
The model card presents coding and task decomposition as important capabilities. It also describes evaluation results from particular harnesses. Those statements motivate a bounded experiment, not a presumption that any generated plan or patch is correct.
The official repository provides model assets and deployment references. Select the exact checkpoint so that the repair experiment does not mix a hosted product label with a different local artifact.
Define a small bug with a hidden trap
Use a fictional CSV reader whose quoted field can contain a delimiter. The repair must preserve escaped quotes and distinguish malformed input from a valid empty field. A simplistic split operation would pass easy examples but violate the required behavior.
Give the model the existing implementation, the failing fixture and protected invariants. Ask for a short repair specification before the patch. Compare that specification with the original requirement: a plan that silently removes malformed-input handling is already drifting from the task.
Protect acceptance evidence
| Artifact | Role in the repair |
|---|---|
| Original failing case | Demonstrates the reported defect |
| Escaped-quote case | Protects related existing behavior |
| Empty-field case | Prevents an incorrect missing-value shortcut |
| Malformed-input case | Preserves the declared error condition |
| Final diff | Shows what was actually changed |
Keep reference tests outside the model’s editable scope for this experiment. The point is not to forbid all test changes in real engineering, but to prevent the candidate from changing its own acceptance target during a model comparison.
Separate tool proposals from execution
The tool-calling guide explains how the model proposes structured calls. A proposal to run tests is not evidence that the tests executed. Preserve actual observations from the test harness and associate them with the resulting patch.
If the final answer says all cases pass while the observation contains a failure, record an unsupported completion claim. If the patch applies but weakens parsing behavior, record a semantic regression even when its explanation looks well organized.
Judge the delivered repair
Keep the proposed specification, patch, observations and independent checks together. Distinguish a correct plan followed by a wrong patch from a wrong plan implemented consistently. Those failures call for different corrections.
A successful experiment shows that M2.5 repaired this bounded behavior while preserving the protected cases. It does not reproduce a published benchmark score, prove that planning always helps or justify accepting future patches without examining their actual behavior.