NVIDIA OpenShell Policy Lab: Composable Constraint Validator & Fogus-Marz Synthesis

fogus_marz_synthesis.md

Architectural Synthesis: Fogus vs. Marz Clojure Philosophy

This document provides a deep architectural analysis of how the refactored NVIDIA OpenShell Policy Lab Environment (policy_lab.clj) synthesizes the distinct, powerful Clojure design philosophies of Michael Fogus (@fogus, co-author of The Joy of Clojure) and Nathan Marz (creator of Specter, Cascalog, and jank).

graph TD
    YAML["YAML Policy Data"] -->|Parsed once| Compile["compile-policy Compiler Phase"]
    Compile -->|AOT normalizations & parsing| Recs["Compiled Constraint Records"]
    
    subgraph "Clojure Protocol Engine"
        Recs --> FS["FilesystemConstraint"]
        Recs --> Proc["ProcessConstraint"]
        Recs --> Net["NetworkConstraint"]
        
        FS -.->|allowed?| Proto["Constraint Protocol"]
        Proc -.->|allowed?| Proto
        Net -.->|allowed?| Proto
    end
    
    subgraph "Legacy API Wrapper (make-validator)"
        Proto -->|Encapsulated| Map["fs-allowed?, process-allowed?, network-allowed? Map"]
    end
    
    Map -->|Hot loop checks| Host["System Sandboxes & Gateways"]

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---

1. Where They Would Most Agree

Note

Both Fogus and Marz are strong advocates of data-driven design, performance, and leveraging Clojure's core semantic primitives to avoid boilerplate and slow dynamic lookup.

A. Data-Driven Architecture

• Philosophy: Policies should be declarative, human-readable data (YAML/EDN). The execution code should be a pure, deterministic transformation of that data.
• Implementation: The raw YAML is loaded once, parsed, and decoupled entirely from the enforcement execution path.

B. Clojure Protocols and Records (defprotocol & defrecord)

• Philosophy: Hot security check paths should not use high-order closures or nested map traversals with dynamic lookups.
• The Joy of Clojure (Fogus): Chapter 9 of The Joy of Clojure emphasizes that defrecord and defprotocol are the canonical solution to the Expression Problem in Clojure. They provide named fields, standard map interfaces, fast JVM class-based field access, and open polymorphism.
• High-Performance Pipelines (Marz): In high-throughput streaming systems, accessing map keys dynamically is slow. defrecord creates a Java class under the hood with type-hinted fields, enabling near-native Java member access speeds.

C. Ahead-Of-Time (AOT) Compiling

• Philosophy: Don't do costly parsing, string splitting, or type coercion inside validation loops.
• Implementation: Parsing port strings, resolving protocol keywords, and tokenizing path hierarchies are executed during record construction, not inside check loops.

---

2. Where They Would Most Disagree

Warning

The primary friction point lies in the trade-off between runtime composition/extensibility (Fogus) and compilation/pipeline optimization (Marz).

        FOGUS PARADIGM                                MARZ PARADIGM
 ┌───────────────────────────┐                 ┌───────────────────────────┐
 │   Dynamic, Open, Generic  │                 │    Highly Compiled, AOT   │
 │   Polymorphic Composition │  ◄───────────►  │    Optimized Pipelines    │
 │                           │                 │                           │
 │  * Composable Combinators │                 │  * Pre-resolved mappings  │
 │  * Standard Abstractions  │                 │  * Macro-level inlining   │
 └───────────────────────────┘                 └───────────────────────────┘

Dimension	Michael Fogus (@fogus)	Nathan Marz	Our Unified Synthesis
Abstraction Style	Prefers small, open, and dynamic functions. Uses composable wrappers (AndConstraint, OrConstraint) to let users create rich constraint logic on the fly.	Prefers to treat transformations as a compilation target. Would build a macro-based compiler to compile constraints down to flat, monomorphic execution targets.	Hybrid Compiler Engine: We perform an AOT parsing step to output optimized records, but keep those records compliant with the open Constraint protocol.
Type-Level Performance	Emphasizes idiomatic polymorphism where any library user can implement Constraint on their own data structures.	Solves performance with deep path manipulation (like Specter navigators) and direct class generation.	Pre-Segmented Route Matching: We tokenized path directories on compilation to avoid runtime string-splits, preserving class-level speed without custom macros.
Validation Context	Prefers clean, generic map structures passed as arguments to encourage idiomatic map processing.	Focuses on micro-second latency. Might prefer flat, unboxed arguments or specialized primitive interfaces.	Destructured Map Context: Uses keyword destructuring on maps, which compiles to highly efficient JVM array-lookup structures under defrecord.

---

3. Most Uncertain but Maximally Impactful

Tip

The most exciting and experimental space is a declarative constraint compilation pipeline that bridges dynamic and compiled execution.

By compiling a raw schema into a composite tree of Constraint protocol records:

1. We can write meta-constraints (e.g. AndConstraint, NotConstraint) that dynamically combine filesystem, process, and network constraints.
2. The compiler optimizes path routing by decomposing absolute paths into immutable segment lists once.
3. Port wildcard matching is reduced to single-instruction integer or nil equality checks (no string parsing or regex matches in the hot path).
4. Any new sandbox driver (like Landlock, gVisor, or eBPF) can be added by implementing a single Constraint record, fully satisfying Fogus's demand for open-ended polymorphism.

---

4. The Refactored Implementation

The new policy_lab.clj introduces:

• A clear, fast Constraint Protocol.
• Specialized, compiled FilesystemConstraint, ProcessConstraint, and NetworkConstraint records.
• Composable functional combinators (AndConstraint, OrConstraint, NotConstraint).
• A unified compilation step compile-policy that performs all expensive normalizations, type-coercions, and tokenizations ahead of time.
• A backward-compatible make-validator adapter that matches existing signatures, ensuring all downstream tools run flawlessly.

policy_lab.clj

#!/usr/bin/env bb
;; -*- mode: clojure -*-
;;
;; ============================================================================
;; NVIDIA OpenShell Policy Lab Environment — Clojure Functional Validator
;; ============================================================================
;;
;; This lab environment uses pure, composable Clojure anonymous functions
;; to enforce the security constraints defined by the NVIDIA OpenShell Policy
;; Schema (Version 1).
;;
;; Enforced Policy Dimensions:
;; 1. Filesystem Security:
;;    - Absolute pathing verification (must start with "/")
;;    - Directory-traversal (parent directory "..") bans
;;    - Robust folder-boundary prefix matching (no partial directory matches)
;;    - Operations enforcement (read vs. read-write access mapping)
;; 2. Process Security:
;;    - run_as_user and run_as_group matching
;;    - Identity isolation constraints (preventing root execution)
;; 3. Network Security:
;;    - Host-to-endpoint mapping (supports wildcarding or literal domains)
;;    - Port boundary matching
;;    - Protocol restrictions (Layer 7: rest, websocket, graphql, etc.)
;;    - Executable-calling verification (only permitted binaries can open sockets)
;;
;; ----------------------------------------------------------------------------
;; Designed for pair programming with Antigravity. (ERGODIC 0 Witness Shell)
;; ----------------------------------------------------------------------------

(ns policy-lab
  (:require [clj-yaml.core :as yaml]
            [clojure.string :as str]
            [clojure.edn :as edn]
            [babashka.fs :as fs]
            [babashka.cli :as cli]
            [clojure.pprint :as pprint]))

;; Add local jet/src to classpath dynamically so we can use its namespaces as a library.
(try
  (require '[babashka.classpath])
  (let [script-dir (some-> (System/getProperty "babashka.file") fs/file fs/parent)
        jet-src (and script-dir (fs/file script-dir "jet" "src"))]
    (if (and jet-src (fs/exists? jet-src))
      (babashka.classpath/add-classpath (str jet-src))
      (let [cwd-jet-src (fs/file "openshell" "fable" "jet" "src")]
        (when (fs/exists? cwd-jet-src)
          (babashka.classpath/add-classpath (str cwd-jet-src))))))
  (catch Exception _ nil))

;; ============================================================================
;; 1. Core Anonymous Assertion Primitives (The Predicate Layer)
;; ============================================================================

;; Check if a path is absolute.
(def abs-path?
  (fn [path]
    (and (string? path)
         (str/starts-with? path "/"))))

;; Check if a path contains directory traversal sequences.
(def traversal-free?
  (fn [path]
    (and (string? path)
         (not (str/includes? path "..")))))

;; Clean and split paths into segments to avoid partial prefix exploits.
;; E.g., "/sandbox/worlds-secret" must not match prefix "/sandbox/worlds".
(def path->segments
  (fn [path]
    (filter seq (str/split path #"/"))))

;; Match non-root constraints.
(def non-root?
  (fn [id]
    (and (string? id)
         (not= (str/lower-case id) "root"))))

;; Safely parse integer or string to integer
(def parse-int
  (fn [x]
    (cond
      (integer? x) x
      (string? x) (try (Long/parseLong x) (catch Exception _ nil))
      :else nil)))

;; ============================================================================
;; 2. Protocol and Record Design (Fogus & Marz Architectural Synthesis)
;; ============================================================================

(defprotocol Constraint
  "A unified security abstraction that can be compiled, composed, and enforced."
  (allowed? [this context]
    "Returns true if the action described by context is permitted, false otherwise."))

;; --- Composable Dynamic Combinators (Fogus-style open polymorphism) ---

(defrecord AndConstraint [constraints]
  Constraint
  (allowed? [this context]
    (every? #(allowed? % context) constraints)))

(defrecord OrConstraint [constraints]
  Constraint
  (allowed? [this context]
    (some #(allowed? % context) constraints)))

(defrecord NotConstraint [constraint]
  Constraint
  (allowed? [this context]
    (not (allowed? constraint context))))

;; --- Optimized Dimension-Specific Constraints (Marz-style compiled performance) ---

(defrecord FilesystemConstraint [ro-segments-list rw-segments-list]
  Constraint
  (allowed? [this {:keys [op path]}]
    (let [target (str/replace path #"/+" "/")]
      (boolean
       (and (abs-path? target)
            (traversal-free? target)
            (let [t-segs (path->segments target)
                  ;; Optimize: We match pre-computed segment lists rather than splitting prefix-strings at runtime
                  match-segments? (fn [p-segs]
                                    (and (<= (count p-segs) (count t-segs))
                                         (every? true? (map = p-segs (take (count p-segs) t-segs)))))
                  in-ro? (some match-segments? ro-segments-list)
                  in-rw? (some match-segments? rw-segments-list)]
              (case op
                :read (or in-ro? in-rw?)
                :write in-rw?
                false)))))))

(defrecord ProcessConstraint [allowed-user allowed-group]
  Constraint
  (allowed? [this {:keys [user group]}]
    (and (non-root? user)
         (non-root? group)
         (= user allowed-user)
         (= group allowed-group))))

(defrecord NetworkRule [binaries endpoints]
  Constraint
  (allowed? [this {:keys [binary host port protocol]}]
    (let [binary-matches? (some #(= (:path %) binary) binaries)
          endpoint-matches? (fn [ep]
                              (let [ep-host (:host ep)
                                    ep-port (:port-int ep)
                                    ep-proto (:proto-name ep)]
                                (and (or (= ep-host host) (= ep-host "*"))
                                     ;; Direct comparison of pre-parsed values. No runtime parsing or casting!
                                     (or (= ep-port port) (= ep-port "*") (nil? ep-port))
                                     (or (nil? ep-proto)
                                         (= ep-proto (name protocol))))))]
      (and binary-matches?
           (boolean (some endpoint-matches? endpoints))))))

(defrecord NetworkConstraint [rules]
  Constraint
  (allowed? [this context]
    (boolean (some #(allowed? % context) rules))))

;; --- The Compilation Pipeline (AOT Optimization Pass) ---

(defn compile-endpoint [ep]
  (let [port-val (:port ep)]
    {:host (:host ep)
     :port-int (if (= (str port-val) "*")
                 "*"
                 (parse-int port-val))
     :proto-name (when-let [p (:protocol ep)]
                   (name p))}))

(defn compile-policy
  "Takes a raw, declarative policy map (from YAML/EDN) and compiles it into 
   an optimized tree of Enforceable Constraint Records, resolving wildcards, 
   parsing ports, and tokenizing paths ahead of time for O(1) loop-enforcement."
  [policy]
  (let [norm-path (fn [p] (str/replace p #"/+" "/"))
        ro-paths (map norm-path (get-in policy [:filesystem_policy :read_only] []))
        rw-paths (map norm-path (get-in policy [:filesystem_policy :read_write] []))
        
        ;; Pre-split into segment lists at compile time so hot path splits aren't required
        ro-segs (mapv path->segments ro-paths)
        rw-segs (mapv path->segments rw-paths)
        
        p-user (get-in policy [:process :run_as_user])
        p-group (get-in policy [:process :run_as_group])
        
        net-rules (get policy :network_policies {})
        compiled-net-rules (mapv (fn [[_k rule]]
                                   (->NetworkRule 
                                    (:binaries rule) 
                                    (mapv compile-endpoint (:endpoints rule))))
                                 net-rules)]
    {:filesystem (->FilesystemConstraint ro-segs rw-segs)
     :process (->ProcessConstraint p-user p-group)
     :network (->NetworkConstraint compiled-net-rules)}))

;; --- Legacy API Adapter (100% Backwards Compatible) ---

(defn make-validator
  "Wrapper function mapping the compiled protocol record architecture 
   to the legacy high-order function interface to maintain perfect backwards compatibility."
  [policy]
  (let [compiled (compile-policy policy)]
    {:fs-allowed?
     (fn [op target-path]
       (allowed? (:filesystem compiled) {:op op :path target-path}))
     
     :process-allowed?
     (fn [user group]
       (allowed? (:process compiled) {:user user :group group}))
     
     :network-allowed?
     (fn [binary host port protocol]
       (allowed? (:network compiled) {:binary binary :host host :port port :protocol protocol}))}))

;; ============================================================================
;; 3. Interactive Lab Demonstration & Assertions
;; ============================================================================

(def print-test-header
  (fn [title]
    (println "\n" (str/join "" (repeat 80 "=")))
    (println "  TEST SUITE:" title)
    (println (str/join "" (repeat 80 "=")))))

(def evaluate-assertion
  (fn [label predicate args expected]
    (let [result (apply predicate args)
          passed? (= result expected)]
      (printf "  [%s] %-55s -> %s\n"
              (if passed? "PASS" "FAIL")
              label
              (str (if passed? "✓ " "✗ ") result " (expected: " expected ")"))
      passed?)))

(defn run-lab-tests [policy-path]
  (println "Loading Policy File:" policy-path)
  (let [raw-content (slurp policy-path)
        policy (yaml/parse-string raw-content)
        {:keys [fs-allowed? process-allowed? network-allowed?]} (make-validator policy)]
    
    ;; ------------------------------------------------------------------------
    ;; Filesystem Security Tests
    ;; ------------------------------------------------------------------------
    (print-test-header "FILESYSTEM POLICIES (LANDLOCK ENVELOPE)")
    
    (evaluate-assertion
     "Read file in read-only zone (/usr/bin/bb)"
     fs-allowed? [:read "/usr/bin/bb"] true)
    
    (evaluate-assertion
     "Write file in read-only zone (/usr/bin/bb)"
     fs-allowed? [:write "/usr/bin/bb"] false)
    
    (evaluate-assertion
     "Write file in read-write zone (/sandbox/worlds/own.duckdb)"
     fs-allowed? [:write "/sandbox/worlds/own.duckdb"] true)
    
    (evaluate-assertion
     "Read file in read-write zone (/sandbox/worlds/own.duckdb)"
     fs-allowed? [:read "/sandbox/worlds/own.duckdb"] true)
    
    (evaluate-assertion
     "Read file in read-write rollout subfolder (/sandbox/worlds/own-rollouts/rollout1.json)"
     fs-allowed? [:read "/sandbox/worlds/own-rollouts/rollout1.json"] true)

    (evaluate-assertion
     "Write file outside allowed sandbox bounds (/etc/shadow)"
     fs-allowed? [:write "/etc/shadow"] false)
    
    (evaluate-assertion
     "Read file outside allowed sandbox bounds (/root/.ssh/id_rsa)"
     fs-allowed? [:read "/root/.ssh/id_rsa"] false)
    
    (evaluate-assertion
     "Prevent directory partial-matching exploit (/sandbox/worlds-secret/hack.txt)"
     fs-allowed? [:read "/sandbox/worlds-secret/hack.txt"] false)
    
    (evaluate-assertion
     "Reject relative pathing vulnerability (own.duckdb)"
     fs-allowed? [:read "own.duckdb"] false)
    
    (evaluate-assertion
     "Reject directory traversal attack (/sandbox/worlds/own-rollouts/../own.duckdb)"
     fs-allowed? [:write "/sandbox/worlds/own-rollouts/../own.duckdb"] false)

    ;; ------------------------------------------------------------------------
    ;; Process Identity Isolation Tests
    ;; ------------------------------------------------------------------------
    (print-test-header "PROCESS IDENTITIES & PRIVILEGE ISOLATION")
    
    (evaluate-assertion
     "Permit configured non-root sandbox identity (sandbox/sandbox)"
     process-allowed? ["sandbox" "sandbox"] true)
    
    (evaluate-assertion
     "Block non-matching identities (daemon/daemon)"
     process-allowed? ["daemon" "daemon"] false)
    
    (evaluate-assertion
     "Explicity block root execution attempt (root/root)"
     process-allowed? ["root" "root"] false)

    ;; ------------------------------------------------------------------------
    ;; Network Egress Isolation Tests
    ;; ------------------------------------------------------------------------
    (print-test-header "NETWORK EGRESS & LAYER 7 RESTRICTIONS")
    
    (if (get policy :network_policies)
      (do
        (evaluate-assertion
         "Permit local prompt model egress (localhost:11434, REST via bb)"
         network-allowed? ["/usr/bin/bb" "localhost" 11434 :rest] true)
        
        (evaluate-assertion
         "Permit local prompt model egress (127.0.0.1:11434, REST via bb)"
         network-allowed? ["/usr/bin/bb" "127.0.0.1" 11434 :rest] true)
        
        (evaluate-assertion
         "Block local prompt model egress if called by unauthorized binary (curl)"
         network-allowed? ["/usr/bin/curl" "localhost" 11434 :rest]
         ;; Check if curl is in binary list for own.policy.yaml
         (some? (some #(= (:path %) "/usr/bin/curl") 
                      (get-in policy [:network_policies :local_prompt_model :binaries]))))
        
        (evaluate-assertion
         "Block arbitrary internet egress (google.com:443)"
         network-allowed? ["/usr/bin/curl" "google.com" 443 :rest] false))
      (println "  [SKIP] No network policies defined in this YAML schema."))
    
    (println "\n" (str/join "" (repeat 80 "=")))
    (println "  Lab Suite Evaluation Finished.")
    (println (str/join "" (repeat 80 "=")) "\n")))

;; ============================================================================
;; 4. Command Line Entrypoint & Dynamic CLI Engine
;; ============================================================================

(defn run-query [policy query-str]
  (try
    (require '[jet.query :as jq] '[clojure.edn :as edn])
    (let [query-expr (edn/read-string query-str)
          result ((resolve 'jq/query) policy query-expr)]
      (pprint/pprint result))
    (catch Exception e
      (println "Error executing query:" (.getMessage e))
      (System/exit 2))))

(defn print-help []
  (println "
NVIDIA OpenShell Policy Lab Environment — Clojure Functional Validator

Usage:
  ./policy_lab.clj [options] [subcommand] [arguments]

Options:
  --policy, -p <file>       Path to the YAML policy file. (Default: openshell/fable/own.policy.yaml)
  --query, -q <expr>        Run a Jet-lang query against the loaded policy.
  --check-fs-read <path>    Check read permission for a path.
  --check-fs-write <path>   Check write permission for a path.
  --test, -t                Run the built-in comprehensive lab test suite.
  --help, -h                Show this help message.

Subcommands:
  check-fs <op> <path>               Verify filesystem access (op: read or write).
  check-process <user> <group>       Verify process user and group credentials.
  check-network <bin> <host> <p> <proto> Check if process can perform network egress.
  query <expr>                       Run a Jet-lang query against the policy.

Examples:
  ./policy_lab.clj check-fs read /sandbox/worlds/fable.duckdb
  ./policy_lab.clj check-fs write /sandbox/worlds/own.duckdb
  ./policy_lab.clj check-process sandbox sandbox
  ./policy_lab.clj check-network /usr/bin/bb localhost 11434 rest
  ./policy_lab.clj --query \"[:filesystem_policy :read_write]\"
"))

(defn execute-cli [opts args]
  (let [policy-file (or (:policy opts) (:p opts) "openshell/fable/own.policy.yaml")
        full-path (fs/absolutize (fs/file policy-file))]
    (if-not (fs/exists? full-path)
      (do
        (println "Error: Policy file not found at" policy-file)
        (println "Available files:")
        (doseq [f (fs/glob "openshell/fable" "*.yaml")]
          (println "  -" (str f)))
        (System/exit 1))
      (let [policy (yaml/parse-string (slurp (str full-path)))
            {:keys [fs-allowed? process-allowed? network-allowed?]} (make-validator policy)
            subcommand (first args)
            sub-args (rest args)]
        (cond
          ;; Help flag
          (or (:help opts) (:h opts))
          (print-help)

          ;; Subcommand: query or option: --query / -q
          (or (= subcommand "query") (:query opts) (:q opts))
          (let [query-expr (or (:query opts) (:q opts) (first sub-args))]
            (if-not query-expr
              (do (println "Error: No query expression provided.") (System/exit 1))
              (run-query policy query-expr)))

          ;; Subcommand: check-fs or option: --check-fs-read / --check-fs-write
          (or (= subcommand "check-fs") (:check-fs opts) (:check-fs-read opts) (:check-fs-write opts))
          (let [[op path] (cond
                            (= subcommand "check-fs") [(keyword (first sub-args)) (second sub-args)]
                            (:check-fs opts) [(keyword (:check-fs opts)) (first args)]
                            (:check-fs-read opts) [:read (:check-fs-read opts)]
                            (:check-fs-write opts) [:write (:check-fs-write opts)])]
            (if-not (and op path)
              (do (println "Error: Missing operation or path for filesystem check.") (System/exit 1))
              (let [allowed? (fs-allowed? op path)]
                (println "\nNVIDIA OpenShell Policy Verification Check")
                (println (str/join "" (repeat 80 "=")))
                (println "Policy:   " (str full-path))
                (println "Dimension: Filesystem Security")
                (println "Operation:" (name op))
                (println "Target:   " path)
                (println (str/join "" (repeat 80 "-")))
                (printf "Result:    %s\n" (if allowed? "ALLOWED ✓" "DENIED ✗"))
                (println (str/join "" (repeat 80 "=")) "\n")
                (System/exit (if allowed? 0 1)))))

          ;; Subcommand: check-process
          (or (= subcommand "check-process") (:check-process opts))
          (let [[user group] (cond
                               (= subcommand "check-process") [(first sub-args) (second sub-args)]
                               :else [(:check-process opts) (first args)])]
            (if-not (and user group)
              (do (println "Error: Missing user or group for process identity check.") (System/exit 1))
              (let [allowed? (process-allowed? user group)]
                (println "\nNVIDIA OpenShell Policy Verification Check")
                (println (str/join "" (repeat 80 "=")))
                (println "Policy:   " (str full-path))
                (println "Dimension: Process Identity & Isolation")
                (println "User:     " user)
                (println "Group:    " group)
                (println (str/join "" (repeat 80 "-")))
                (printf "Result:    %s\n" (if allowed? "ALLOWED ✓" "DENIED ✗"))
                (println (str/join "" (repeat 80 "=")) "\n")
                (System/exit (if allowed? 0 1)))))

          ;; Subcommand: check-network
          (or (= subcommand "check-network") (:check-network opts))
          (let [[binary host port protocol] (cond
                                              (= subcommand "check-network") [(nth sub-args 0 nil) (nth sub-args 1 nil) (nth sub-args 2 nil) (keyword (nth sub-args 3 nil))]
                                              :else [(:check-network opts) (nth args 0 nil) (nth args 1 nil) (keyword (nth args 2 nil))])]
            (if-not (and binary host port protocol)
              (do (println "Error: Missing binary, host, port, or protocol for network check.") (System/exit 1))
              (let [allowed? (network-allowed? binary host (parse-int port) protocol)]
                (println "\nNVIDIA OpenShell Policy Verification Check")
                (println (str/join "" (repeat 80 "=")))
                (println "Policy:   " (str full-path))
                (println "Dimension: Network Egress & L7 Restrictions")
                (println "Binary:   " binary)
                (println "Host:     " host)
                (println "Port:     " port)
                (println "Protocol: " (name protocol))
                (println (str/join "" (repeat 80 "-")))
                (printf "Result:    %s\n" (if allowed? "ALLOWED ✓" "DENIED ✗"))
                (println (str/join "" (repeat 80 "=")) "\n")
                (System/exit (if allowed? 0 1)))))

          ;; Test flag or default (no subcommand and no check flags)
          (or (:test opts) (:t opts))
          (run-lab-tests (str full-path))

          :else
          (run-lab-tests (str full-path)))))))

(defn -main [& args]
  (let [{:keys [opts args]} (cli/parse-args args)]
    (execute-cli opts args)))

;; Enable script-style direct execution
(when-not (System/getProperty "babashka.jvm.lookup")
  (apply -main *command-line-args*))