diff --git a/README.fr.md b/README.fr.md
index cd51ed1..bfcdce1 100644
--- a/README.fr.md
+++ b/README.fr.md
@@ -345,7 +345,7 @@ matchigo émet un `console.warn` **une seule fois** quand il détecte un mésusa
 - Reconstruire `rules` à chaque appel de `match(value, rules)` (l'anti-pattern « cold-path inline »).
 - Créer des milliers d'instances distinctes de `matcher()` (typiquement, le builder est dans une boucle chaude).
 
-Les avertissements sont pilotés par `NODE_ENV` (`production`/`prod` les désactive) ou par l'override explicite `MATCHIGO_DEV=0` / `MATCHIGO_DEV=1`. La vérification se fait une fois au chargement du module, donc **production a un coût nul** — pas de lecture d'env, pas de compteur, pas de formatage de string.
+Les avertissements sont pilotés par `NODE_ENV` (`production`/`prod` les désactive). La vérification se fait une fois au chargement du module, donc **production a un coût nul** — pas de lecture d'env, pas de compteur, pas de formatage de string.
 
 ```ts
 import { silenceWarnings } from "matchigo";
diff --git a/README.md b/README.md
index a997aee..63b7b1e 100644
--- a/README.md
+++ b/README.md
@@ -399,7 +399,7 @@ matchigo emits a `console.warn` **once** when it detects misuse that defeats cac
 - Reconstructing `rules` on every `match(value, rules)` call (the "cold-path inline" anti-pattern).
 - Creating thousands of distinct `matcher()` instances (usually means the builder is inside a hot loop).
 
-Warnings are controlled by `NODE_ENV` (`production`/`prod` disables them) or the explicit `MATCHIGO_DEV=0` / `MATCHIGO_DEV=1` override. The check happens once at module load, so **production has zero cost** — no env reads, no counters, no string formatting.
+Warnings are controlled by `NODE_ENV` (`production`/`prod` disables them). The check happens once at module load, so **production has zero cost** — no env reads, no counters, no string formatting.
 
 ```ts
 import { silenceWarnings } from "matchigo";
diff --git a/package.json b/package.json
index f54a9c2..a251b57 100644
--- a/package.json
+++ b/package.json
@@ -5,10 +5,22 @@
   "keywords": [
     "pattern-matching",
     "match",
-    "rust",
+    "dispatch",
+    "compile",
+    "rule-engine",
+    "rules",
     "typescript",
+    "type-safe",
     "exhaustive",
-    "fast"
+    "narrowing",
+    "discriminated-union",
+    "switch",
+    "data-driven",
+    "fast",
+    "zero-dependency",
+    "rust-like",
+    "bun",
+    "node"
   ],
   "license": "MIT",
   "author": "SUP2Ak",
@@ -24,13 +36,8 @@
   },
   "files": [
     "dist",
-    "src",
     "README.md",
     "README.fr.md",
-    "FAQ.md",
-    "FAQ.fr.md",
-    "CONTRIBUTING.md",
-    "CONTRIBUTING.fr.md",
     "LICENSE"
   ],
   "sideEffects": false,
diff --git a/src/dev.ts b/src/dev.ts
index 044ae24..3934977 100644
--- a/src/dev.ts
+++ b/src/dev.ts
@@ -1,9 +1,8 @@
 // Dev-only cold-path instrumentation.
 // Resolution policy (evaluated ONCE at module load → zero runtime cost):
 //
-//   1. MATCHIGO_DEV env var wins — accepts "0"|"false" (off) or "1"|"true" (on).
-//   2. Else NODE_ENV — matches "production", "prod" (case-insensitive) → off.
-//   3. Else default → on (verbose dev).
+//   1. NODE_ENV — matches "production", "prod" (case-insensitive) → off.
+//   2. Else default → on (verbose dev).
 //
 // Programmatic override: silenceWarnings() at startup mutes everything.
 // No NODE_ENV at all? Dev mode is ON. The counters still cost only a few `++`
@@ -12,9 +11,6 @@
 const DEV: boolean = (() => {
   try {
     if (typeof process === "undefined" || !process?.env) return true;
-    const explicit = process.env.MATCHIGO_DEV;
-    if (explicit === "0" || explicit === "false") return false;
-    if (explicit === "1" || explicit === "true") return true;
     const node = (process.env.NODE_ENV ?? "").toLowerCase();
     if (node === "production" || node === "prod") return false;
     return true;
@@ -48,7 +44,7 @@ export function trackMatch(cacheHit: boolean): void {
         `    • Or compile once with compile():\n` +
         `        const dispatch = compile([...]);\n` +
         `        dispatch(value);\n` +
-        `  Silence: silenceWarnings() — or set MATCHIGO_DEV=0.`,
+        `  Silence: silenceWarnings() — or set NODE_ENV=production.`,
     );
     warnedMatch = true;
   }
@@ -65,7 +61,7 @@ export function trackMatcher(): void {
         `        .with(...)\n` +
         `        .otherwise(...);   // builds + compiles once\n` +
         `      classify(value);      // reused hot path\n` +
-        `  Silence: silenceWarnings() — or set MATCHIGO_DEV=0.`,
+        `  Silence: silenceWarnings() — or set NODE_ENV=production.`,
     );
     warnedMatcher = true;
   }
diff --git a/src/p.ts b/src/p.ts
index eb24c6b..7b51750 100644
--- a/src/p.ts
+++ b/src/p.ts
@@ -236,7 +236,7 @@ export const P = {
    *
    * @example
    * ```ts
-   * { with: P.union("GET", "POST", "PUT"), then: () => "http-verb" }
+   * { with: P.union("GET", "POST", "PUT"), then: () => "method" }
    * ```
    */
   union: <const Values extends readonly unknown[]>(...values: Values): PUnion<Values> => ({