docs(work): scaffold fallow-integration-v1 epic + stories

docs/work/fallow-integration-v1/_epic.md

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+---
+id: fallow-integration-v1
+prd: null
+title: Fallow integration v1 — whole-codebase static analysis as 5th gate
+type: epic
+status: in-progress
+features: [tooling, ci, agent-prompts]
+created: 2026-05-13
+---
+
+## Goal
+
+Wire Fallow as the 5th conformance gate: install, configure, pnpm script,
+turbo task, CI step, docs update, agent prompt update.
+
+## Why
+
+Fallow catches what file-local lint, type-check, manifest assertions, and
+conformance event closure cannot — dead code, dupes, circular deps,
+complexity hotspots, and AI-change drift. `fallow audit --base main` is
+purpose-built for AI agents to self-validate before submission.
+
+## Stories
+
+- [ ] [01 — Install fallow + .fallowrc.json](01-fallow-install/_story.md)
+- [ ] [02 — pnpm + turbo wiring](02-pnpm-turbo-wiring/_story.md)
+- [ ] [03 — CI workflow integration](03-ci-integration/_story.md)
+- [ ] [04 — Docs + agent prompt updates](04-docs-and-prompts/_story.md)