diff --git a/main/project.clj b/main/project.clj
index 5356364..2eab113 100644
--- a/main/project.clj
+++ b/main/project.clj
@@ -10,7 +10,8 @@
   :scm {:name "git" :url "https://github.com/taoensso/telemere"}
 
   :dependencies
-  [[com.taoensso/encore "3.132.0"]]
+  [[com.taoensso/truss  "2.0.0-SNAPSHOT"]
+   [com.taoensso/encore "3.132.0"]]
 
   :test-paths ["test" #_"src"]
 
diff --git a/main/src/taoensso/telemere.cljc b/main/src/taoensso/telemere.cljc
index 3e4abe6..1397244 100644
--- a/main/src/taoensso/telemere.cljc
+++ b/main/src/taoensso/telemere.cljc
@@ -7,7 +7,8 @@
   {:author "Peter Taoussanis (@ptaoussanis)"}
   (:refer-clojure :exclude [newline])
   (:require
-   [taoensso.encore         :as enc :refer [have have?]]
+   [taoensso.truss          :as truss]
+   [taoensso.encore         :as enc]
    [taoensso.encore.signals :as sigs]
    [taoensso.telemere.impl  :as impl]
    [taoensso.telemere.utils :as utils]
@@ -166,7 +167,7 @@
            ;; Via SDK autoconfiguration extension (when available)
            (enc/compile-when
              io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk
-             (enc/catching :common
+             (truss/catching :common
                (let [builder (io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk/builder)
                      sdk    (.getOpenTelemetrySdk (.build builder))]
                  {:logger-provider (.getLogsBridge     sdk)
@@ -272,7 +273,7 @@
              (impl/signal! ~(assoc opts :error gs-error))
              (do                              ~gs-error)))))))
 
-(comment (with-signal (throw (error! ::my-id (ex-info "MyEx" {})))))
+(comment (with-signal (throw (error! ::my-id (truss/ex-info "MyEx" {})))))
 
 #?(:clj
    (let [base-opts {:kind :error, :level :error}]
@@ -289,7 +290,7 @@
               opts           (dissoc    opts :run :catch-val)
               gs-caught      (gensym "caught")]
 
-          `(enc/try* ~run-form
+          `(truss/try* ~run-form
              (catch :all ~gs-caught
                (impl/signal! ~(assoc opts :error gs-caught))
                (if ~rethrow? (throw ~gs-caught) ~catch-val))))))))
@@ -400,9 +401,9 @@
 
   (add-handler! :default/console (handler:console))
 
-  #?(:clj (enc/catching (require '[taoensso.telemere.tools-logging])))  ;    TL->Telemere
-  #?(:clj (enc/catching (require '[taoensso.telemere.slf4j])))          ; SLF4J->Telemere
-  #?(:clj (enc/catching (require '[taoensso.telemere.open-telemetry]))) ; Telemere->OTel
+  #?(:clj (truss/catching (require '[taoensso.telemere.tools-logging])))  ;    TL->Telemere
+  #?(:clj (truss/catching (require '[taoensso.telemere.slf4j])))          ; SLF4J->Telemere
+  #?(:clj (truss/catching (require '[taoensso.telemere.open-telemetry]))) ; Telemere->OTel
   )
 
 ;;;; Flow benchmarks
@@ -467,8 +468,8 @@
           (event! ::ev-id
             {:data  {:a :A :b :b}
              :error
-             (ex-info "Ex2" {:b :B}
-               (ex-info "Ex1" {:a :A}))}))]
+             (truss/ex-info   "Ex2" {:b :B}
+               (truss/ex-info "Ex1" {:a :A}))}))]
 
     (do      (let [hf (handler:file)]        (hf sig) (hf)))
     (do      (let [hf (handler:console)]     (hf sig) (hf)))
diff --git a/main/src/taoensso/telemere/consoles.cljc b/main/src/taoensso/telemere/consoles.cljc
index 963c767..2ddcdf6 100644
--- a/main/src/taoensso/telemere/consoles.cljc
+++ b/main/src/taoensso/telemere/consoles.cljc
@@ -2,7 +2,8 @@
   "Private ns, implementation detail.
   Core console handlers, aliased in main Telemere ns."
   (:require
-   [taoensso.encore         :as enc :refer [have have?]]
+   [taoensso.truss          :as truss]
+   [taoensso.encore         :as enc]
    [taoensso.telemere.utils :as utils]))
 
 (comment
@@ -126,7 +127,7 @@
                (.group js/console (preamble-fn signal))
                (content-fn signal (logger-fn logger) identity)
 
-               (when-let [stack (and error (.-stack (enc/ex-root error)))]
+               (when-let [stack (and error (.-stack (truss/ex-root error)))]
                  (.call logger logger stack))
 
                (.groupEnd js/console)))))))))
diff --git a/main/src/taoensso/telemere/files.clj b/main/src/taoensso/telemere/files.clj
index 8c630e8..e57c51d 100644
--- a/main/src/taoensso/telemere/files.clj
+++ b/main/src/taoensso/telemere/files.clj
@@ -2,7 +2,8 @@
   "Private ns, implementation detail.
   Core file handler, aliased in main Telemere ns."
   (:require
-   [taoensso.encore :as enc :refer [have have?]]
+   [taoensso.truss  :as truss]
+   [taoensso.encore :as enc]
    [taoensso.telemere.utils :as utils]))
 
 (comment
@@ -71,9 +72,9 @@
       :daily   (str (.format dtf (java.time.LocalDate/ofEpochDay            edy))  "d")
       :weekly  (str (.format dtf (java.time.LocalDate/ofEpochDay (edy-week  edy))) "w")
       :monthly (str (.format dtf (java.time.LocalDate/ofEpochDay (edy-month edy))) "m")
-      (enc/unexpected-arg! interval
-        {:context  `file-timestamp
-         :param    'interval
+      (truss/unexpected-arg! interval
+        {:param             'interval
+         :context  `file-timestamp
          :expected #{:daily :weekly :monthly}}))))
 
 (comment (file-timestamp->edy (format-file-timestamp :weekly (udt->edy (enc/now-udt*)))))
@@ -81,7 +82,7 @@
 (defn manage-test-files!
   "Describes/creates/deletes files used for tests/debugging, etc."
   [action]
-  (have? [:el #{:return :println :create :delete}] action)
+  (truss/have? [:el #{:return :println :create :delete}] action)
   (let [fnames_ (volatile! [])
         action!
         (fn [app timestamp part gz? timestamp main?]
@@ -136,7 +137,7 @@
     - Have the same `interval` type ∈ #{:daily :weekly :monthly nil} (=> ?timestamped).
     - Have the given timestamp (e.g. \"2020-01-01d\", or nil for NO timestamp)."
   [main-path interval timestamp sort?]
-  (have? [:el #{:daily :weekly :monthly nil}] interval)
+  (truss/have? [:el #{:daily :weekly :monthly nil}] interval)
   (let [main-file (utils/as-file main-path) ; `logs/app.log`
         main-dir  (.getParentFile (.getAbsoluteFile main-file)) ; `.../logs`
 
@@ -168,9 +169,8 @@
                              (let [actual (.getAbsolutePath file-in)
                                    expected file-name]
                                (when-not (.endsWith actual expected)
-                                 (throw
-                                   (ex-info "Unexpected file name"
-                                     {:actual actual, :expected expected}))))
+                                 (truss/ex-info! "Unexpected file name"
+                                   {:actual actual, :expected expected})))
 
                              (conj acc
                                {:file      file-in
@@ -234,8 +234,8 @@
             arch-file+gz (utils/as-file arch-file-name+gz) ; `logs/app.log.1.gz` or `logs/app.log-2020-01-01d.1.gz`
             ]
 
-        (have? false? (.exists    arch-file+gz)) ; No pre-existing `.1.gz`
-        (.renameTo      main-file arch-file-gz)
+        (truss/have? false? (.exists arch-file+gz)) ; No pre-existing `.1.gz`
+        (.renameTo      main-file    arch-file-gz)
         (.createNewFile main-file)
 
         (when gz?
diff --git a/main/src/taoensso/telemere/impl.cljc b/main/src/taoensso/telemere/impl.cljc
index e84d061..ff1746f 100644
--- a/main/src/taoensso/telemere/impl.cljc
+++ b/main/src/taoensso/telemere/impl.cljc
@@ -3,7 +3,8 @@
   Signal design shared by: Telemere, Tufte, Timbre."
   (:require
    [clojure.set             :as set]
-   [taoensso.encore         :as enc :refer [have have?]]
+   [taoensso.truss          :as truss]
+   [taoensso.encore         :as enc]
    [taoensso.encore.signals :as sigs])
 
   #?(:cljs
@@ -169,7 +170,7 @@
 (defn default-trace-msg
   [form value error nsecs]
   (if error
-    (str form " !> " (enc/ex-type error))
+    (str form " !> " (truss/ex-type error))
     (str form " => " value)))
 
 (comment
@@ -232,7 +233,7 @@
                    :server         io.opentelemetry.api.trace.SpanKind/SERVER
                    :consumer       io.opentelemetry.api.trace.SpanKind/CONSUMER
                    :producer       io.opentelemetry.api.trace.SpanKind/PRODUCER
-                   (enc/unexpected-arg! ?span-kind
+                   (truss/unexpected-arg! ?span-kind
                      {:expected #{nil :internal :client :server :consumer :producer}})))
 
                (.with ^io.opentelemetry.context.Context parent-context
@@ -327,7 +328,7 @@
      ([raw-msg? trap-signals? form]
       `(let [sig_# (volatile! nil)]
          (binding [*sig-spy* (SpyOpts. sig_# true ~trap-signals?)]
-           (enc/try* ~form (catch :all _#)))
+           (truss/try* ~form (catch :all _#)))
 
          (if ~raw-msg?
            (do               @sig_#)
@@ -348,7 +349,7 @@
       `(let [sigs_# (volatile! nil)
              base-map#
              (binding [*sig-spy* (SpyOpts. sigs_# false ~trap-signals?)]
-               (enc/try*
+               (truss/try*
                  (do            {:value ~form})
                  (catch :all t# {:error t#})))
 
@@ -477,7 +478,7 @@
             sample-rate kind ns id level when rate-limit rate-limit-by,
             ctx ctx+ parent root trace?, do let data msg error #_run & kvs]}])
 
-       (enc/unexpected-arg! macro-id))))
+       (truss/unexpected-arg! macro-id))))
 
 ;;;; Signal macro
 
@@ -486,12 +487,11 @@
   (#?(:clj invoke :cljs -invoke) [_] (if error (throw error) value))
   (#?(:clj invoke :cljs -invoke) [_ signal_]
     (if error
-      (throw
-        (ex-info "Signal `:run` form error"
-          (enc/try*
-            (do           {:taoensso.telemere/signal (force signal_)})
-            (catch :all t {:taoensso.telemere/signal-error t}))
-          error))
+      (truss/ex-info! "Signal `:run` form error"
+        (truss/try*
+          (do           {:taoensso.telemere/signal (force signal_)})
+          (catch :all t {:taoensso.telemere/signal-error t}))
+        error)
       value)))
 
 (defn inst+nsecs
@@ -506,10 +506,9 @@
    (defn- valid-opts! [x]
      (if (map? x)
        (do     x)
-       (throw
-         ;; We require const map keys, but vals may require eval
-         (ex-info "Telemere signal opts must be a map with const (compile-time) keys."
-           {:opts (enc/typed-val x)})))))
+       ;; We require const map keys, but vals may require eval
+       (truss/ex-info! "Telemere signal opts must be a map with const (compile-time) keys."
+         {:opts (truss/typed-val x)}))))
 
 #?(:clj (defn- auto-> [form auto-form] (if (= form :auto) auto-form form)))
 #?(:clj
@@ -565,9 +564,10 @@
                trace? (get opts :trace? (boolean run-form))
                _
                (when-not (contains? #{true false nil} trace?)
-                 (enc/unexpected-arg! trace?
-                   {:msg "Expected constant (compile-time) `:trace?` boolean"
-                    :context `signal!}))
+                 (truss/unexpected-arg! trace?
+                   {:param             'trace?
+                    :context `signal!
+                    :msg "Expected constant (compile-time) `:trace?` boolean"}))
 
                thread-form (when clj? `(enc/thread-info))
 
@@ -611,17 +611,15 @@
                      _ ; Compile-time validation
                      (do
                        (when (and run-form error-form) ; Ambiguous source of error
-                         (throw
-                           (ex-info "Signals cannot have both `:run` and `:error` opts at the same time"
-                             {:run-form   run-form
-                              :error-form error-form
-                              :location   location
-                              :other-opts (dissoc opts :run :error)})))
+                         (truss/ex-info! "Signals cannot have both `:run` and `:error` opts at the same time"
+                           {:run-form   run-form
+                            :error-form error-form
+                            :location   location
+                            :other-opts (dissoc opts :run :error)}))
 
                        (when-let [e (find opts :msg_)] ; Common typo/confusion
-                         (throw
-                           (ex-info "Signals cannot have `:msg_` opt (did you mean `:msg`?))"
-                             {:msg_ (enc/typed-val (val e))}))))
+                         (truss/ex-info! "Signals cannot have `:msg_` opt (did you mean `:msg`?))"
+                           {:msg_ (truss/typed-val (val e))})))
 
                      signal-form
                      (let [record-form
@@ -631,7 +629,7 @@
                                [:run    :cljs]  `(Signal. 1 ~'__inst ~'__uid, ~location ~'__ns ~line-form ~column-form ~file-form,                                               ~sample-rate-form, ~'__kind ~'__id ~'__level, ~ctx-form ~parent-form ~'__root1, ~data-form ~kvs-form ~'_msg_,   ~'_run-err  '~show-run-form ~show-run-val ~'_end-inst ~'_run-nsecs)
                                [:no-run :clj ]  `(Signal. 1 ~'__inst ~'__uid, ~location ~'__ns ~line-form ~column-form ~file-form, (enc/host-info) ~'__thread ~'__otel-context1, ~sample-rate-form, ~'__kind ~'__id ~'__level, ~ctx-form ~parent-form ~'__root1, ~data-form ~kvs-form ~msg-form, ~error-form nil             nil           nil         nil)
                                [:no-run :cljs]  `(Signal. 1 ~'__inst ~'__uid, ~location ~'__ns ~line-form ~column-form ~file-form,                                               ~sample-rate-form, ~'__kind ~'__id ~'__level, ~ctx-form ~parent-form ~'__root1, ~data-form ~kvs-form ~msg-form, ~error-form nil             nil           nil         nil)
-                               (enc/unexpected-arg! clause {:context :signal-constructor-args})))
+                               (truss/unexpected-arg! clause {:context :signal-constructor-args})))
 
                            record-form
                            (if-not run-form
@@ -678,7 +676,7 @@
                    ~'__run-result
                    ~(when run-form
                       `(let [t0# (enc/now-nano*)]
-                         (enc/try*
+                         (truss/try*
                            (do            (RunResult. ~run-form* nil (- (enc/now-nano*) t0#)))
                            (catch :all t# (RunResult. nil        t#  (- (enc/now-nano*) t0#))))))]
 
@@ -692,7 +690,7 @@
                       `(binding [*trace-root*   ~'__root1
                                  *trace-parent* {:id ~'__id, :uid ~'__uid}]
                          (let [t0# (enc/now-nano*)]
-                           (enc/try*
+                           (truss/try*
                              (do            (RunResult. ~run-form* nil (- (enc/now-nano*) t0#)))
                              (catch :all t# (RunResult. nil        t#  (- (enc/now-nano*) t0#)))))))]
 
@@ -713,7 +711,7 @@
                                  *trace-parent* {:id ~'__id, :uid ~'__uid}]
                          (let [otel-scope# (.makeCurrent ~'__otel-context1)
                                t0#         (enc/now-nano*)]
-                           (enc/try*
+                           (truss/try*
                              (do            (RunResult. ~run-form* nil (- (enc/now-nano*) t0#)))
                              (catch :all t# (RunResult. nil        t#  (- (enc/now-nano*) t0#)))
                              (finally (.close otel-scope#))))))])
diff --git a/main/src/taoensso/telemere/open_telemetry.clj b/main/src/taoensso/telemere/open_telemetry.clj
index b0aef70..645c455 100644
--- a/main/src/taoensso/telemere/open_telemetry.clj
+++ b/main/src/taoensso/telemere/open_telemetry.clj
@@ -5,7 +5,8 @@
   (:require
    [clojure.string  :as str]
    [clojure.set     :as set]
-   [taoensso.encore :as enc :refer [have have?]]
+   [taoensso.truss  :as truss]
+   [taoensso.encore :as enc]
    [taoensso.telemere.utils :as utils]
    [taoensso.telemere.impl  :as impl]
    [taoensso.telemere       :as tel])
@@ -61,24 +62,24 @@
   clojure.lang.IPersistentCollection
   (-put-attr! [v ^String k ^AttributesBuilder ab]
     (if (map? v)
-      (when-let [^String s (enc/catching :common (enc/pr-edn* v))]
+      (when-let [^String s (truss/catching :common (enc/pr-edn* v))]
         (.put ab k s))
 
       (when-some [v1 (if (indexed? v) (nth v 0 nil) (first v))]
       (or
         (cond
-          (string?  v1) (enc/catching :common (.put ab k ^"[Ljava.lang.String;" (into-array String v)))
-          (int?     v1) (enc/catching :common (.put ab k                        (long-array        v)))
-          (float?   v1) (enc/catching :common (.put ab k                        (double-array      v)))
-          (boolean? v1) (enc/catching :common (.put ab k                        (boolean-array     v))))
+          (string?  v1) (truss/catching :common (.put ab k ^"[Ljava.lang.String;" (into-array String v)))
+          (int?     v1) (truss/catching :common (.put ab k                        (long-array        v)))
+          (float?   v1) (truss/catching :common (.put ab k                        (double-array      v)))
+          (boolean? v1) (truss/catching :common (.put ab k                        (boolean-array     v))))
 
-        (when-let [^String s (enc/catching :common (enc/pr-edn* v))]
+        (when-let [^String s (truss/catching :common (enc/pr-edn* v))]
           (.put ab k s)))))
     ab)
 
   Object
   (-put-attr! [v ^String k ^AttributesBuilder ab]
-    (when-let [^String s (enc/catching :common (enc/pr-edn* v))]
+    (when-let [^String s (truss/catching :common (enc/pr-edn* v))]
       (.put ab k s))))
 
 (defmacro ^:private put-attr! [attrs-builder attr-name attr-val]
@@ -90,8 +91,9 @@
     (map?                 attrs) (enc/run-kv! (fn [k v] (put-attr! attrs-builder (attr-name k) v)) attrs) ; Unprefixed
     (instance? Attributes attrs)                        (.putAll   attrs-builder ^Attributes       attrs) ; Unprefixed
     :else
-    (enc/unexpected-arg! attrs
-      {:context `put-attrs!
+    (truss/unexpected-arg! attrs
+      {:param             'attrs
+       :context `put-attrs!
        :expected #{nil map io.opentelemetry.api.common.Attributes}})))
 
 (defn- merge-attrs!
@@ -145,7 +147,7 @@
       (put-attr! ab "level" ; Standard
         (level->string level)))
 
-    (when-let [{:keys [type msg trace data]} (enc/ex-map (get signal :error))]
+    (when-let [{:keys [type msg trace data]} (truss/ex-map (get signal :error))]
       (put-attr! ab "exception.type"    type) ; Standard
       (put-attr! ab "exception.message" msg)  ; Standard
       (when trace
@@ -356,7 +358,7 @@
                            (force msg_)
                            (when-let [error (get signal :error)]
                              (when (instance? Throwable error)
-                               (str (enc/ex-type error) ": " (enc/ex-message error)))))]
+                               (str (truss/ex-type error) ": " (ex-message error)))))]
                 (.setBody lrb body))
 
               ;; Emit to `LogRecordExporter`
diff --git a/main/src/taoensso/telemere/postal.clj b/main/src/taoensso/telemere/postal.clj
index 7a971f1..91a5bfb 100644
--- a/main/src/taoensso/telemere/postal.clj
+++ b/main/src/taoensso/telemere/postal.clj
@@ -2,6 +2,7 @@
   "Email handler using `postal`,
     Ref. <https://github.com/drewr/postal>."
   (:require
+   [taoensso.truss          :as truss]
    [taoensso.encore         :as enc]
    [taoensso.encore.signals :as sigs]
    [taoensso.telemere.utils :as utils]
@@ -76,8 +77,8 @@
       subject-fn (utils/signal-preamble-fn {:format-inst-fn nil})
       subject-max-len 128}}]
 
-   (when-not (map? conn-opts) (throw (ex-info "Expected `:conn-opts` map" (enc/typed-val conn-opts))))
-   (when-not (map? msg-opts)  (throw (ex-info "Expected `:msg-opts` map"  (enc/typed-val msg-opts))))
+   (when-not (map? conn-opts) (truss/ex-info! "Expected `:conn-opts` map" (truss/typed-val conn-opts)))
+   (when-not (map? msg-opts)  (truss/ex-info! "Expected `:msg-opts` map"  (truss/typed-val msg-opts)))
 
    (let [subject-fn
          (if-let [n subject-max-len]
@@ -108,7 +109,7 @@
                     success? (= (get result :code) 0)]
 
                 (when-not success?
-                  (throw (ex-info "Failed to send email" result ex)))))))]
+                  (truss/ex-info! "Failed to send email" result ex))))))]
 
      (with-meta handler-fn
        {:dispatch-opts default-dispatch-opts}))))
diff --git a/main/src/taoensso/telemere/slack.clj b/main/src/taoensso/telemere/slack.clj
index 83d5da9..3493c1c 100644
--- a/main/src/taoensso/telemere/slack.clj
+++ b/main/src/taoensso/telemere/slack.clj
@@ -2,7 +2,8 @@
   "Slack handler using `clj-slack`,
     Ref. <https://github.com/julienXX/clj-slack>"
   (:require
-   [taoensso.encore :as enc :refer [have have?]]
+   [taoensso.truss  :as truss]
+   [taoensso.encore :as enc]
    [taoensso.telemere.utils :as utils]
    [clj-slack.core  :as slack]
    [clj-slack.chat  :as slack.chat]))
@@ -68,8 +69,8 @@
          {:keys [channel-id]} post-opts
          post-opts    (dissoc post-opts :channel-id)
 
-         _ (when-not (string? token)      (throw (ex-info "Expected `:conn-opts/token` string"      (enc/typed-val token))))
-         _ (when-not (string? channel-id) (throw (ex-info "Expected `:post-opts/channel-id` string" (enc/typed-val channel-id))))
+         _ (when-not (string? token)      (truss/ex-info! "Expected `:conn-opts/token` string"      (truss/typed-val token)))
+         _ (when-not (string? channel-id) (truss/ex-info! "Expected `:post-opts/channel-id` string" (truss/typed-val channel-id)))
 
          handler-fn
          (fn a-handler:slack
diff --git a/main/src/taoensso/telemere/sockets.clj b/main/src/taoensso/telemere/sockets.clj
index cffd4ea..efe736c 100644
--- a/main/src/taoensso/telemere/sockets.clj
+++ b/main/src/taoensso/telemere/sockets.clj
@@ -1,7 +1,8 @@
 (ns taoensso.telemere.sockets
   "Basic TCP/UDP socket handlers."
   (:require
-   [taoensso.encore :as enc :refer [have have?]]
+   [taoensso.truss  :as truss]
+   [taoensso.encore :as enc]
    [taoensso.telemere.utils :as utils])
 
   (:import
@@ -90,8 +91,8 @@
          socket (DatagramSocket.) ; No need to change socket once created
          lock   (Object.)]
 
-     (when-not (string? host) (throw (ex-info "Expected `:host` string" (enc/typed-val host))))
-     (when-not (int?    port) (throw (ex-info "Expected `:port` int"    (enc/typed-val port))))
+     (when-not (string? host) (truss/ex-info! "Expected `:host` string" (truss/typed-val host)))
+     (when-not (int?    port) (truss/ex-info! "Expected `:port` int"    (truss/typed-val port)))
 
      (.connect socket (InetSocketAddress. (str host) (int port)))
 
diff --git a/main/src/taoensso/telemere/streams.clj b/main/src/taoensso/telemere/streams.clj
index a9d0b31..18a1b65 100644
--- a/main/src/taoensso/telemere/streams.clj
+++ b/main/src/taoensso/telemere/streams.clj
@@ -1,7 +1,8 @@
 (ns taoensso.telemere.streams
   "Interop support for standard stream/s -> Telemere."
   (:require
-   [taoensso.encore        :as enc :refer [have have?]]
+   [taoensso.encore        :as truss]
+   [taoensso.encore        :as enc]
    [taoensso.telemere.impl :as impl]))
 
 (enc/defonce ^:private          orig-*out* "Original `*out*` on ns load" *out*)
diff --git a/main/src/taoensso/telemere/timbre.cljc b/main/src/taoensso/telemere/timbre.cljc
index 04bb7d2..2c39ef3 100644
--- a/main/src/taoensso/telemere/timbre.cljc
+++ b/main/src/taoensso/telemere/timbre.cljc
@@ -3,7 +3,8 @@
   Intended to help ease migration from Timbre to Telemere."
   (:require
    [clojure.string         :as str]
-   [taoensso.encore        :as enc :refer [have have?]]
+   [taoensso.truss         :as truss]
+   [taoensso.encore        :as enc]
    [taoensso.telemere.impl :as impl]
    [taoensso.telemere      :as tel]))
 
@@ -21,10 +22,10 @@
   (defn ^:no-doc parse-vargs
     "Private, don't use. Adapted from Timbre."
     [format-msg? vargs]
-    (let [[v0] vargs]
+    (let [[v0]   vargs]
 
-      (if (enc/error? v0)
-        (let [error   v0
+      (if (truss/error? v0)
+        (let [error     v0
               vargs   (enc/vrest vargs)
               pattern (if format-msg? (let [[v0] vargs] v0) nil)
               vargs   (if format-msg? (enc/vrest vargs) vargs)
diff --git a/main/src/taoensso/telemere/tools_logging.clj b/main/src/taoensso/telemere/tools_logging.clj
index da02b23..4118578 100644
--- a/main/src/taoensso/telemere/tools_logging.clj
+++ b/main/src/taoensso/telemere/tools_logging.clj
@@ -8,7 +8,8 @@
     `clojure.tools.logging` - For env config to match library's conventions."
 
   (:require
-   [taoensso.encore        :as enc :refer [have have?]]
+   [taoensso.truss         :as truss]
+   [taoensso.encore        :as enc]
    [taoensso.telemere.impl :as impl]
    [clojure.tools.logging  :as ctl]))
 
diff --git a/main/src/taoensso/telemere/utils.cljc b/main/src/taoensso/telemere/utils.cljc
index 0642661..62990b6 100644
--- a/main/src/taoensso/telemere/utils.cljc
+++ b/main/src/taoensso/telemere/utils.cljc
@@ -4,6 +4,7 @@
   (:require
    [clojure.string          :as str]
    #?(:clj [clojure.java.io :as jio])
+   [taoensso.truss          :as truss]
    [taoensso.encore         :as enc]
    [taoensso.encore.signals :as sigs]
    [taoensso.telemere.impl  :as impl]))
@@ -118,8 +119,9 @@
             :hex/secure    (hex-uid-fn  {:secure? true,  :root-len root-len, :child-len child-len})
             nil)))
 
-      (enc/unexpected-arg! kind
-        {:context  `uid-fn
+      (truss/unexpected-arg! kind
+        {:param             'kind
+         :context  `uid-fn
          :expected
          '#{:uuid :uuid-str :default,
             :nano/secure   [:nano/secure   <root-len> <child-len>]
@@ -205,7 +207,7 @@
   [{:keys [type msg data]} ...] cause chain."
   [signal]
   (enc/if-let [error (get signal :error)
-               chain (enc/ex-chain :as-map error)]
+               chain (truss/ex-chain :as-map error)]
     (assoc signal :error chain)
     (do    signal)))
  
@@ -224,9 +226,8 @@
 
        (if (.canWrite file)
          file
-         (throw
-           (ex-info "Unable to prepare writable `java.io.File`"
-             {:path (.getAbsolutePath file)}))))))
+         (truss/ex-info! "Unable to prepare writable `java.io.File`"
+           {:path (.getAbsolutePath file)})))))
 
 #?(:clj
    (defn ^:no-doc file-stream
@@ -253,7 +254,7 @@
      [{:keys [file append?]
        :or   {append? true}}]
 
-     (when-not file (throw (ex-info "Expected `:file` value" (enc/typed-val file))))
+     (when-not file (truss/ex-info! "Expected `:file` value" (truss/typed-val file)))
 
      (let [file    (writeable-file! file)
            stream_ (volatile! (file-stream file append?))
@@ -364,8 +365,8 @@
         socket-fn     default-socket-fn
         ssl-socket-fn default-ssl-socket-fn}}]
 
-     (when-not (string? host) (throw (ex-info "Expected `:host` string" (enc/typed-val host))))
-     (when-not (int?    port) (throw (ex-info "Expected `:port` int"    (enc/typed-val port))))
+     (when-not (string? host) (truss/ex-info! "Expected `:host` string" (truss/typed-val host)))
+     (when-not (int?    port) (truss/ex-info! "Expected `:port` int"    (truss/typed-val port)))
 
      (let [new-conn! ; => [<java.net.Socket> <java.io.OutputStream>], or throws
            (fn []
@@ -379,7 +380,7 @@
                  [socket (.getOutputStream socket)])
 
                (catch Exception ex
-                 (throw (ex-info "Failed to create connection" opts ex)))))
+                 (truss/ex-info! "Failed to create connection" opts ex))))
 
            conn_  (volatile! (new-conn!))
            open?_ (enc/latom true)
@@ -464,7 +465,7 @@
            (s+nl "  " class "/" method " at " file ":" line)))
        (str sb))))
 
-(comment (println (format-clj-stacktrace (:trace (enc/ex-map (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"})))))))
+(comment (println (format-clj-stacktrace (:trace (truss/ex-map (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"})))))))
 
 (defn format-error-fn
   "Experimental, subject to change.
@@ -477,7 +478,7 @@
          nls enc/newlines]
 
      (fn format-error [error]
-       (when-let [em (enc/ex-map error)]
+       (when-let [em (truss/ex-map error)]
          (let [sb (enc/str-builder)
                s+ (partial enc/sb-append sb)
                {:keys [chain trace]} em]
@@ -497,9 +498,9 @@
            (str sb)))))))
 
 (comment
-  (do                         (throw      (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"}))))
-  (do                         (enc/ex-map (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"}))))
-  (println (str "--\n" ((format-error-fn) (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"}))))))
+  (do                         (throw        (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"}))))
+  (do                         (truss/ex-map (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"}))))
+  (println (str "--\n" ((format-error-fn)   (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"}))))))
 
 ;;;;
 
@@ -680,8 +681,8 @@
                  (assoc!* m k v)
 
                  ;; Main keys to include with modified val
-                 :error (if-let [chain (enc/ex-chain :as-map v)] (assoc!  m k chain) m)  ; As `expand-signal-error`
-                 :msg_                                           (assoc!* m k (force v)) ; As  `force-signal-msg`
+                 :error (if-let [chain (truss/ex-chain :as-map v)] (assoc!  m k chain) m)  ; As `expand-signal-error`
+                 :msg_                                             (assoc!* m k (force v)) ; As  `force-signal-msg`
 
                  ;; Implementation keys to always exclude
                  (clojure.core/into ()
@@ -748,15 +749,14 @@
              :json
              #?(:cljs pr-json
                 :clj
-                (throw
-                  (ex-info "`:json` pr-fn only supported in Cljs. To output JSON in Clj, please provide an appropriate unary fn instead (e.g. jsonista/write-value-as-string)."
-                    {})))
+                (truss/ex-info! "`:json` pr-fn only supported in Cljs. To output JSON in Clj, please provide an appropriate unary fn instead (e.g. jsonista/write-value-as-string)."
+                  {}))
 
              (if (fn? pr-fn)
                (do    pr-fn)
-               (enc/unexpected-arg! pr-fn
-                 {:context  `pr-signal-fn
-                  :param    'pr-fn
+               (truss/unexpected-arg! pr-fn
+                 {:param             'pr-fn
+                  :context  `pr-signal-fn
                   :expected
                   #?(:clj  '#{:edn       unary-fn}
                      :cljs '#{:edn :json unary-fn})}))))]
@@ -813,5 +813,5 @@
            {:my-k1 #{:a :b :c}
             :msg   "hi"
             :data  {:a :A}
-            ;; :error (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"}))
+            ;; :error (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"}))
             :run   (/ 1 0)}))))))
diff --git a/main/test/taoensso/telemere_tests.cljc b/main/test/taoensso/telemere_tests.cljc
index 9f35be8..88bb5a3 100644
--- a/main/test/taoensso/telemere_tests.cljc
+++ b/main/test/taoensso/telemere_tests.cljc
@@ -2,7 +2,8 @@
   (:require
    [clojure.test            :as test :refer [deftest testing is]]
    [clojure.core.async      :as async]
-   [taoensso.encore         :as enc  :refer [throws? submap?] :rename {submap? sm?}]
+   [taoensso.truss          :as truss :refer [throws? submap?] :rename {submap? sm?}]
+   [taoensso.encore         :as enc]
    [taoensso.encore.signals :as sigs]
    [taoensso.telemere       :as tel]
    [taoensso.telemere.impl  :as impl
@@ -32,12 +33,12 @@
   (do (def t2s "2024-02-02T02:02:02.120Z") (def t2 (enc/as-inst t2s)) (def udt2 (enc/as-udt t2)))
   (do (def t3s "2024-03-03T03:03:03.130Z") (def t3 (enc/as-inst t3s)) (def udt3 (enc/as-udt t3)))
 
-  (def  ex-info-type (#'enc/ex-type (ex-info "" {})))
-  (def  ex1 (ex-info "Ex1" {}))
-  (def  ex2 (ex-info "Ex2" {:k2 "v2"} (ex-info "Ex1" {:k1 "v1"})))
-  (def  ex2-chain (enc/ex-chain :as-map ex2))
+  (def  ex-info-type (truss/ex-type (truss/ex-info "" {})))
+  (def  ex1          (truss/ex-info "Ex1" {}))
+  (def  ex2          (truss/ex-info "Ex2" {:k2 "v2"} (truss/ex-info "Ex1" {:k1 "v1"})))
+  (def  ex2-chain    (truss/ex-chain :as-map ex2))
   (defn ex1! [] (throw ex1))
-  (defn ex1? [x] (= (enc/ex-root x) ex1)))
+  (defn ex1? [x] (= (truss/ex-root x) ex1)))
 
 (let [rt-sig-filter_ (atom nil)
       sig-handlers_  (atom nil)]
@@ -848,7 +849,7 @@
 
                [(is (= sig*1 sig*2) "Default :pr-fn is :edn")
                 (is
-                  (enc/submap? sig*1
+                  (sm? sig*1
                     {:schema 1, :kind :event, :id ::ev-id, :level :info,
                      :ns      "taoensso.telemere-tests"
                      :msg_    "a b"
@@ -860,7 +861,7 @@
               (testing ":json pr-fn"
                 (let [sig* (enc/read-json ((tel/pr-signal-fn {:pr-fn :json}) sig))]
                   (is
-                    (enc/submap? sig*
+                    (sm? sig*
                       {"schema" 1, "kind" "event", "id" "taoensso.telemere-tests/ev-id",
                        "level" "info",             "ns" "taoensso.telemere-tests"
                        "msg_"    "a b"
diff --git a/slf4j/src/taoensso/telemere/slf4j.clj b/slf4j/src/taoensso/telemere/slf4j.clj
index 9ada649..bc58ddd 100644
--- a/slf4j/src/taoensso/telemere/slf4j.clj
+++ b/slf4j/src/taoensso/telemere/slf4j.clj
@@ -18,7 +18,8 @@
 
   {:author "Peter Taoussanis (@ptaoussanis)"}
   (:require
-   [taoensso.encore        :as enc :refer [have have?]]
+   [taoensso.truss         :as truss]
+   [taoensso.encore        :as enc]
    [taoensso.telemere.impl :as impl])
 
   (:import
@@ -87,7 +88,7 @@
         ;; Vector of markers
         (reduce
           (fn [acc in] (into acc (marker-names in)))
-          #{} (have vector? marker-or-markers))))))
+          #{} (truss/have vector? marker-or-markers))))))
 
 (comment
   (let [m1 (est-marker! "M1")