diff --git a/docs/notes/ideas.md b/docs/notes/ideas.md
index 6618289..8b3eb1b 100644
--- a/docs/notes/ideas.md
+++ b/docs/notes/ideas.md
@@ -74,4 +74,15 @@ Potential use cases:
 - Start a countdown timer subscription only during a specific game phase
 - Switch from animationFrame to a slower timer when entity count exceeds a threshold
 
+- Switch from animationFrame to a slower timer when entity count exceeds a threshold
+
 The dispatcher already handles subscription diffing (`diffSubscriptions`) — adding/removing subscriptions between commits is fully supported. This just needs a real consumer to exercise it.
+
+## Zero Console Policy
+
+This repository implements a strict zero-console policy for all source code.
+
+- All `console.log`, `console.info`, and `console.error` calls are prohibited in `packages/*/src`.
+- This ensures that production logs are clean and prevents side-channel information leaks.
+- Error handling must be managed via the MVU pattern (dispatching error messages) or silent failures where appropriate, rather than simple console output.
+- Enforcement is handled via ESLint (`no-console: "error"`) and a pre-push regex check.
diff --git a/eslint.config.js b/eslint.config.js
index 0ecaa39..e809c6f 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -64,11 +64,15 @@ export default tseslint.config(
       "@typescript-eslint/no-explicit-any": "error",
       "@typescript-eslint/no-unused-vars": [
         "error",
-        { argsIgnorePattern: "^_" },
+        {
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
+          caughtErrorsIgnorePattern: "^_",
+        },
       ],
       "@typescript-eslint/no-floating-promises": "error",
       "@typescript-eslint/switch-exhaustiveness-check": "error",
-      "no-console": ["warn", { allow: ["warn", "error", "info"] }],
+      "no-console": "error",
       "boundaries/element-types": [
         "error",
         {
diff --git a/packages/app-web/src/features/devtools/devtools.ts b/packages/app-web/src/features/devtools/devtools.ts
index a323c95..980ea7e 100644
--- a/packages/app-web/src/features/devtools/devtools.ts
+++ b/packages/app-web/src/features/devtools/devtools.ts
@@ -197,8 +197,8 @@ export function view<M extends Model>(
                     try {
                       const log = JSON.parse(content);
                       onReplay(log, currentModel);
-                    } catch (err) {
-                      console.error("Failed to parse log", err);
+                    } catch (_err) {
+                      void _err;
                     }
                   };
                   reader.readAsText(file);
@@ -229,8 +229,8 @@ export function view<M extends Model>(
                 try {
                   const log = JSON.parse(saved);
                   onReplay(log, currentModel);
-                } catch (e) {
-                  console.error("Failed to restore", e);
+                } catch (_e) {
+                  void _e;
                 }
               }
             },
diff --git a/packages/app-web/src/main.ts b/packages/app-web/src/main.ts
index 073ca32..37bf9b0 100644
--- a/packages/app-web/src/main.ts
+++ b/packages/app-web/src/main.ts
@@ -167,9 +167,6 @@ try {
     try {
       const log = JSON.parse(savedLogStr);
       if (!Array.isArray(log)) throw new Error("Log is not an array");
-      console.info(
-        `[STORAGE] Found saved session with ${log.length} messages.`,
-      );
 
       restoredModel = replay({
         initialModel,
@@ -201,9 +198,7 @@ try {
       }
 
       initialLog = log;
-      console.info("[STORAGE] Session restored successfully.");
     } catch (e) {
-      console.error("[STORAGE] Failed to restore session:", e);
       restoreError = e instanceof Error ? e.message : String(e);
       localStorage.removeItem("causaloop_log_v1");
     }
@@ -240,7 +235,6 @@ try {
       }
     }
 
-    console.info("[REPLAY] Result:", isMatched ? "MATCH" : "MISMATCH");
     dispatcher.dispatch({
       kind: "devtools",
       msg: {
@@ -320,7 +314,6 @@ try {
     dispatcher.dispatch(msg as AppMsg),
   );
 } catch (e) {
-  console.error("[FATAL] Application failed to initialize:", e);
   showRecoveryScreen(
     e instanceof Error
       ? `Initialization error: ${e.message}. This is likely caused by corrupted saved state.`
diff --git a/packages/platform-browser/src/runners/index.ts b/packages/platform-browser/src/runners/index.ts
index 66683c3..23475b3 100644
--- a/packages/platform-browser/src/runners/index.ts
+++ b/packages/platform-browser/src/runners/index.ts
@@ -68,8 +68,8 @@ export class BrowserRunner<TMsg extends Msg = Msg> {
           this.runWrapper(effect, dispatch);
           break;
       }
-    } catch (err) {
-      console.error("Critical error in effect runner:", err);
+    } catch (_err) {
+      void _err;
     }
   }
   private runWrapper(
diff --git a/scripts/check-forbidden.sh b/scripts/check-forbidden.sh
index 8aedf3b..65843d8 100755
--- a/scripts/check-forbidden.sh
+++ b/scripts/check-forbidden.sh
@@ -1,7 +1,16 @@
 #!/bin/bash
+
+# Check for eslint-disable
 if grep -r "eslint-disable" packages/*/src; then
   echo "Error: eslint-disable comments are forbidden in src directories."
   exit 1
 fi
-echo "No forbidden comments found."
+
+# Check for console usage
+if grep -r "console\." packages/*/src; then
+  echo "Error: Use of console is forbidden in src directories."
+  exit 1
+fi
+
+echo "No forbidden patterns found."
 exit 0