Full engineering pipeline for a coding task — research, a solution proposal approved by the user, decomposition into subtasks approved task by task, implementation, test + verification with a fix-loop, commit and push via the commit skill, then an optional code review on request. Invoke for any non-trivial coding task (new feature, bug fix, refactor, migration) that changes code, in any git repo. Do not invoke for pure Q&A, explanations, or read-only exploration with no code changes intended.
