Individual skill
brownfield-retrospective
Run the ECC engineering process retroactively against an existing project slice. Audit current state, reconstruct past decisions, produce a four-axis gap register (thinking, coding practice, missing features, technology selection), then execute fixes forward through the plan-TDD-review pipeline. Use when adopting ECC mid-project, taking over an inherited codebase, or asking what was missed and what would have been built differently from day one.
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# Brownfield Retrospective
Run ECC's engineering process retroactively against a project that was built without it. Pick any slice of an existing codebase, audit what exists, reconstruct how it got there, extract a four-axis gap register, then execute the fixes forward through the standard ECC pipeline.
The workflow is slice-first: no whole-repo onboarding is required before it is useful, and every phase is re-enterable from a durable artifact on disk. Start in the middle, work backwards, then move forward.
## When to Activate
- Adopting ECC in a repository that already exists and is already shaped
- User asks to "audit my existing project", "retro this codebase", or "what did we miss?"
- Taking over, inheriting, or returning to a codebase after a long gap
- User asks "why is it like this?" followed by "should it stay like this?"
- A module, feature, or service needs a rethink before the next feature lands on top of it
- Deciding whether a legacy area should be fixed forward, rewritten, or left documented as-is