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hemx/examples/saas/README.md
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slhx agent 107111052d docs(recipes): add observability flags boundary
Document provider-explicit observability, feature flag, A/B, and killswitch boundaries for hemx apps. The recipe keeps metrics providers and rollout controls in app/platform code while handlers return generated effects and the tiny runtime stays provider-free.

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# hemx SaaS tutorial skeleton
This is the compile-tested skeleton for the v1 production-shaped tutorial app. It is intentionally provider-light: auth/session, CSRF, persistence, deploy, metrics, and islands are explicit app boundaries, not hemx core services. req: examples/001 req: auth/001
What it proves today:
- typed form/newtype inputs for project creation
- auth/session context passed through normal Rust state
- CSRF-safe mutation checked before persistence
- local in-memory persistence adapter instead of a vendored SQL/auth provider
- generated form, slot, keyed row, page-swap, and live-status commands
- page shell with plain CSS and one explicit metrics island script
- compile-time surface generation plus interaction tests
For provider-explicit boundaries, see `../../docs/recipes/sqlx-persistence.md`, `../../docs/recipes/auth-session-csrf.md`, `../../docs/recipes/observability-flags.md`, and `../../docs/recipes/deploy-versioning.md`.
What it deliberately does not claim yet:
- a checked-in SQLx migration crate or database pool
- production cookie/session middleware
- a deploy target, flags, analytics, billing, or offline sync
- browser automation for the metrics island
Run:
```sh
cargo run -p hemx-saas-example
cargo test -p hemx-saas-example
```