sdlc-retrolisted

# sdlc-retro The **Retrospective (Learn)** phase executor — LoopSmith's backward-learning loop, so a goal doesn't just ship, it *teaches*. Runs at the end of a goal, **after Review**. Grade **intent-vs-shipped as an independent, project-informed pass** — under `config.review.independent` (default on) the loop runs it as a fresh subagent, so the honest "did we build what the goal asked, and what debt did the narrow fix leave?" isn't answered by the same context that just argued the work was done. It is **advisory**: it proposes, writes only the audit-trail note freely, and **parks** any north-star or standing-rule change for your approval — it never rewrites your standing docs unattended (mirrors how `sdlc-kg`'s `maintain` only proposes). ## Executor resolution (host-aware) No `superpowers` / `code-review` companion covers retrospective learning, so this is **always LoopSmith's own**. It *complements* the Review phase's `superpowers:verification-before-completion` (which asks "is it correct / done?") — it does not duplicate it (this asks "what did we learn, what debt remains?"). Pure markdown discipline + `git` / `python3`, so it degrades gracefully on any host. ## Pre-flight — gather the evidence (repo-auto-detect, fail-open) Read what this specific repo offers; skip whatever's absent (never break the run): - **The original intent** — the goal's own text: the `.sdlc/goals/NNNN-*.md` file (local mode) or the issue body (`gh issue view "$goal"`, github mode). - **What ship