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14:00 Decomposer fixes the failure mode Experiment 0082. 0081 found the wall on dynaconf-1225 was decomposition: a thirteen-item port handed to a free model as one red wall made it a many-feature porter that edited a dozen files, broke test collection, and never converged. 10:50 Focus lands the patch, test-writing is the next wall Two runs bracketed the model range on dynaconf-1225 and failed identically: a flagship model at maximum reasoning effort and a free deepseek model both read the thirteen-item port issue as one wide surface, explored every file, and finished with an empty patch, zero of five. 10:00 Stacking levers regresses, model wall Scope and issue-example each landed a single lever at two of five on dynaconf-1225, both zero-regression, both stalling on the same three py-module-path cases. 09:30 Regression guard, inert on a checklist port Experiment 0081. The reproduction gate holds a coding turn to a red-to-green, but it says nothing about what else the fix broke, so the regression guard runs the project's own tests before the loop and refuses to converge if a fix regresses one that was green. 08:30 Issue-example gate matches scope ceiling The last non-tailored harness lever for dynaconf__dynaconf-1225, tested after trace inspection localized the remaining three failures to a model-reasoning ceiling rather than retrieval. 07:15 tomo-oi + testgen, deepseek-flash-free, dynaconf-1225 The previous run on this task ended with a prediction: a cheap model told to write the test first skips it and drifts to the cheapest checklist item, so move test authoring into the harness. This run does that.