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SKILLS/26-vibe-coding-fundamentals.md

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+# Vibe Coding With Fundamentals (Safety Rails)
+
+Use this skill when you’re using “vibe coding” (fast, conversational building) but want production-grade outcomes.
+
+## The good
+- Rapid scaffolding and iteration
+- Fast UI prototypes
+- Quick exploration of architectures and options
+
+## The failure mode
+- “It works on my machine” code with weak tests
+- Security foot-guns (auth, input validation, secrets)
+- Performance cliffs (accidental O(n²), repeated I/O)
+- Unmaintainable abstractions
+
+## Safety rails (apply every time)
+- Always start with acceptance criteria (what “done” means).
+- Prefer small PRs; never dump a huge AI diff.
+- Require DoD gates (lint/test/build) before merge.
+- Write tests for behavior changes.
+- For anything security/data related: do a Reviewer pass.
+
+## When to slow down
+- Auth/session/token work
+- Anything touching payments, PII, secrets
+- Data migrations/schema changes
+- Performance-critical paths
+- “It’s flaky” or “it only fails in CI”
+
+## Practical prompt pattern (use in PLAN)
+- “State assumptions, list files to touch, propose tests, and include rollback steps.”