Foundation library providing shared utilities used by all other Boundary modules. Contains no shell layer — everything is pure functions.
| Namespace | Purpose |
|---|---|
| Malli-based validation framework with error codes, messages, and "did you mean?" suggestions |
| Central registry for validation rules across modules |
| Validation coverage reporting and analysis |
| Snapshot-based validation testing |
| kebab-case / snake_case / camelCase conversions |
| UUID, Instant, BigDecimal string conversions |
| PII filtering for logs and error reports |
| Generic validation helpers |
| Interceptor pipeline runner (enter/leave/error phases) |
| Interceptor context creation and management |
| Feature flag evaluation logic |
The most commonly used utilities across the entire monorepo:
(require '[boundary.core.utils.case-conversion :as cc])
;; Persistence boundary — DB record → Clojure entity
(cc/snake-case->kebab-case-map db-record)
;; Persistence boundary — Clojure entity → DB insert/update
(cc/kebab-case->snake-case-map entity)
;; HTTP boundary — Clojure entity → JSON response
(cc/kebab-case->camel-case-map entity)
;; HTTP boundary — JSON request → Clojure map
(cc/camel-case->kebab-case-map api-input)(require '[boundary.core.utils.validation :as validation])
;; Generic validation with transformation
(validation/validate-with-transform SomeSchema data mt/string-transformer)
;=> {:valid? true :data transformed-data}
;=> {:valid? false :errors validation-errors}
;; CLI argument validation
(validation/validate-cli-args CliSchema args cli-transformer)The interceptor system supports enter/leave/error phases, used by both HTTP and service layers:
(require '[boundary.core.interceptor :as ic])
;; Enter phases run forward, leave phases run in reverse
(ic/run-pipeline initial-ctx [interceptor1 interceptor2 interceptor3])
;; Enter order: int1 → int2 → int3
;; Leave order: int3 → int2 → int1All functions must be pure — no I/O, no logging, no side effects
This library has no ports.clj or shell/ — it’s entirely functional core
Only dependencies: org.clojure/clojure and metosin/malli
All other Boundary libraries depend on core
clojure -M:test:db/h2 :core
clojure -M:test:db/h2 --focus-meta :unit # All core tests are :unitCan you improve this documentation?Edit on GitHub
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