diff --git a/_config/date.js b/_config/date.js
new file mode 100644
index 0000000..531f79c
--- /dev/null
+++ b/_config/date.js
@@ -0,0 +1,31 @@
+const { DateTime } = require("luxon");
+
+module.exports = function (eleventyConfig, { TIME_ZONE }) {
+    eleventyConfig.addDateParsing(function (dateValue) {
+        // i know this is a deranged solution. sorry LOL
+        let localDate;
+        try {
+            if (dateValue instanceof Date && !isNaN(dateValue)) {
+                // handle filename dates (ie 2025-10-18-post.md)
+                localDate = DateTime.fromJSDate(dateValue, { zone: "utc" })
+                    .setZone(TIME_ZONE)
+                    .startOf("day"); // Set to midnight in America/Santiago
+            } else if (typeof dateValue === "string" && dateValue) {
+                // handle string dates (ie from front matter, if used)
+                localDate = DateTime.fromISO(dateValue, { zone: TIME_ZONE }).startOf("day");
+            } else {
+                // handle invalid input
+                console.warn(`Invalid date value: ${dateValue} for ${this.page.inputPath}`);
+                localDate = DateTime.now().setZone(TIME_ZONE).startOf("day");
+            }
+            if (!localDate || localDate.isValid === false) {
+                throw new Error(`Invalid date value (${dateValue}) for ${this.page.inputPath}: ${localDate?.invalidReason || "Unknown"}`);
+            }
+            return localDate.toJSDate();
+        } catch (error) {
+            console.error(`Date parsing error for ${this.page.inputPath}:`, error.message);
+            // fallback to current date in TIME_ZONE
+            return DateTime.now().setZone(TIME_ZONE).startOf("day").toJSDate();
+        }
+    });
+};
diff --git a/_config/filters.js b/_config/filters.js
new file mode 100644
index 0000000..2f1affe
--- /dev/null
+++ b/_config/filters.js
@@ -0,0 +1,128 @@
+const { DateTime } = require("luxon");
+
+module.exports = function (eleventyConfig, { TIME_ZONE, defaultLanguage }) {
+    // {{ post.date | date("dd/MM/yyyy") }} -> 18/10/2025
+    eleventyConfig.addFilter("date", function (dateObj, format = "dd/MM/yyyy") {
+        let dt = dateObj;
+        // handle string dates
+        if (typeof dateObj === "string") {
+            dt = DateTime.fromISO(dateObj, { zone: TIME_ZONE }).toJSDate();
+        }
+        // handle DateTime objects (from addDateParsing)
+        if (dateObj instanceof DateTime) {
+            dt = dateObj.toJSDate();
+        }
+        // check dt as valid Date object
+        if (!(dt instanceof Date) || isNaN(dt)) {
+            console.log("Invalid date input:", dateObj);
+            return "";
+        }
+        // format in TIME_ZONE
+        const formatted = DateTime.fromJSDate(dt, { zone: TIME_ZONE })
+            .toFormat(format);
+        console.log("Date input:", dt, "Formatted:", formatted, "Timezone:", TIME_ZONE);
+        return formatted;
+    });
+
+    // filters collections by current language
+    eleventyConfig.addFilter("i18n_filter", function (collection, limit = null) {
+        const lang = this.page.lang; // access page.lang from context
+        let filtered = collection.filter(item => item.data.lang === lang);
+        if (limit !== null) {
+            filtered = filtered.slice(0, limit);
+        }
+        return filtered;
+    });
+
+    const LOCALE_URL_DEBUG = process.env.LOCALE_URL_DEBUG === "1" || process.env.LOCALE_URL_DEBUG === "true";
+
+    // locale_url replacement that uses pre-compile filesystem
+    eleventyConfig.addNunjucksFilter("locale_url_resolve", function (targetUrl, desiredLocale) {
+        const ctx = (this && this.ctx) ? this.ctx : {};
+        const collections = (ctx.collections) ? ctx.collections : {};
+        const all = collections.all || [];
+
+        if (!targetUrl || typeof targetUrl !== "string") return targetUrl;
+        if (!targetUrl.startsWith("/")) return targetUrl; // external or relative link -> leave as is
+
+        // determine locale to resolve to
+        const pageLang = desiredLocale || (ctx.page && ctx.page.lang) || ctx.locale || defaultLanguage;
+
+        if (LOCALE_URL_DEBUG) {
+            console.warn(`[locale_url_resolve] resolving targetUrl="${targetUrl}" desiredLocale="${desiredLocale}" pageLang="${pageLang}"`);
+        }
+
+        // if requested locale is default, return the raw url
+        if (pageLang === defaultLanguage) {
+            if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] requested locale is default (${defaultLanguage}) — returning raw URL "${targetUrl}"`);
+            return targetUrl;
+        }
+
+        // normalize targetUrl to ensure trailing slash for comparison
+        const normUrl = targetUrl.endsWith("/") ? targetUrl : (targetUrl + "/");
+
+        // try to find the canonical (default language) page corresponding to targetUrl
+        let canonical = all.find(p => {
+            return (p.url === normUrl || p.url === targetUrl) && p.data && p.data.lang === defaultLanguage;
+        });
+
+        // if not found, try to find any page with that url (maybe targetUrl already localized)
+        if (!canonical) {
+            canonical = all.find(p => (p.url === normUrl || p.url === targetUrl));
+        }
+
+        if (LOCALE_URL_DEBUG) {
+            if (canonical) {
+                const cs = (canonical.page && canonical.page.filePathStem) ? canonical.page.filePathStem : "(no stem)";
+                const clang = (canonical.data && canonical.data.lang) ? canonical.data.lang : "(no lang)";
+                console.warn(`[locale_url_resolve] canonical found: url="${canonical.url}" filePathStem="${cs}" lang="${clang}"`);
+            } else {
+                console.warn(`[locale_url_resolve] canonical NOT found for targetUrl="${targetUrl}". Will fallback to prefixed URL.`);
+            }
+        }
+
+        // if cannot find canonical page, fall back to a prefixed URL (best effort)
+        if (!canonical) {
+            const fallback = (`/${pageLang}${targetUrl}`).replace(/\/{2,}/g, "/");
+            if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] fallback -> "${fallback}"`);
+            return fallback;
+        }
+
+        // determine canonical filePathStem (the source input path without extension)
+        const canonicalLang = canonical.data && canonical.data.lang ? canonical.data.lang : defaultLanguage;
+        const canonicalStem = (canonical.page && canonical.page.filePathStem) ? canonical.page.filePathStem : "";
+
+        // remove the canonical lang prefix from the stem to create a "key" to match across locales.
+        // ie "/en/about" -> "/about", "/es/about" -> "/about"
+        const key = canonicalStem.replace(new RegExp(`^/${canonicalLang}`), "").replace(/^\/+/, "");
+
+        if (LOCALE_URL_DEBUG) {
+            console.warn(`[locale_url_resolve] canonicalLang="${canonicalLang}" canonicalStem="${canonicalStem}" key="${key}"`);
+        }
+
+        // find the localized page whose filePathStem ends with that key and whose lang matches pageLang.
+        const localized = all.find(p => {
+            const pLang = p.data && p.data.lang;
+            const pStem = (p.page && p.page.filePathStem) ? p.page.filePathStem : "";
+            // be defensive: ensure pLang exists
+            if (!pLang) return false;
+            return pLang === pageLang && pStem.endsWith(key);
+        });
+
+        if (localized && localized.url) {
+            if (LOCALE_URL_DEBUG) {
+                const ls = (localized.page && localized.page.filePathStem) ? localized.page.filePathStem : "(no stem)";
+                console.warn(`[locale_url_resolve] localized found: url="${localized.url}" filePathStem="${ls}" lang="${localized.data.lang}"`);
+            }
+            return localized.url;
+        }
+
+        // no localized page found — fall back to prefixed path
+        const fallback2 = (`/${pageLang}${targetUrl}`).replace(/\/{2,}/g, "/");
+        if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] localized NOT found for key="${key}" — fallback -> "${fallback2}"`);
+        return fallback2;
+    });
+
+    // turn on disabled nunjucks filter
+    eleventyConfig.addNunjucksFilter("values", obj => Object.values(obj));
+};
diff --git a/_config/plugins.js b/_config/plugins.js
new file mode 100644
index 0000000..53958bc
--- /dev/null
+++ b/_config/plugins.js
@@ -0,0 +1,31 @@
+const { I18nPlugin } = require("@11ty/eleventy");
+const i18n = require("eleventy-plugin-i18n");
+const eleventySass = require("eleventy-sass");
+const toml = require("@iarna/toml");
+const fs = require("fs");
+const path = require("path");
+
+module.exports = function (eleventyConfig, { defaultLanguage }) {
+    // load translations
+    const translationsToml = fs.readFileSync(
+        path.join(__dirname, "..", "_data", "locale.toml"),
+        "utf-8"
+    );
+    const translations = toml.parse(translationsToml);
+
+    // plugins
+    eleventyConfig.addPlugin(eleventySass);
+    eleventyConfig.addPlugin(I18nPlugin, {
+        defaultLanguage,
+        errorMode: "allow-fallback",
+    });
+    eleventyConfig.addPlugin(i18n, {
+        translations,
+        fallbackLocales: {
+            "*": "en",
+        }
+    });
+
+    // data extensions
+    eleventyConfig.addDataExtension("toml", (contents) => toml.parse(contents));
+};
\ No newline at end of file
diff --git a/_config/utils.js b/_config/utils.js
new file mode 100644
index 0000000..387ae1e
--- /dev/null
+++ b/_config/utils.js
@@ -0,0 +1,7 @@
+const TIME_ZONE = "America/Santiago";
+const defaultLanguage = "en";
+
+module.exports = {
+    TIME_ZONE,
+    defaultLanguage
+};
\ No newline at end of file
diff --git a/eleventy.config.js b/eleventy.config.js
index cbc0c92..3ab00b8 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -1,44 +1,9 @@
-const { I18nPlugin } = require("@11ty/eleventy");
-const { DateTime } = require("luxon");
-
-const i18n = require("eleventy-plugin-i18n");
-const eleventySass = require("eleventy-sass");
-const toml = require("@iarna/toml");
-
-const fs = require("fs");
-const path = require("path");
-
-const TIME_ZONE = "America/Santiago";
+const { TIME_ZONE, defaultLanguage } = require("./_config/utils");
+const addDateParsing = require("./_config/date");
+const addFilters = require("./_config/filters");
+const addPlugins = require("./_config/plugins");
 
 module.exports = function (eleventyConfig) {
-    eleventyConfig.addDateParsing(function (dateValue) {
-        // i know this is a deranged solution. sorry LOL
-        let localDate;
-        try {
-            if (dateValue instanceof Date && !isNaN(dateValue)) {
-                // handle filename dates (ie 2025-10-18-post.md)
-                localDate = DateTime.fromJSDate(dateValue, { zone: "utc" })
-                    .setZone(TIME_ZONE)
-                    .startOf("day"); // Set to midnight in America/Santiago
-            } else if (typeof dateValue === "string" && dateValue) {
-                // handle string dates (ie from front matter, if used)
-                localDate = DateTime.fromISO(dateValue, { zone: TIME_ZONE }).startOf("day");
-            } else {
-                // handle invalid input
-                console.warn(`Invalid date value: ${dateValue} for ${this.page.inputPath}`);
-                localDate = DateTime.now().setZone(TIME_ZONE).startOf("day");
-            }
-            if (!localDate || localDate.isValid === false) {
-                throw new Error(`Invalid date value (${dateValue}) for ${this.page.inputPath}: ${localDate?.invalidReason || "Unknown"}`);
-            }
-            return localDate.toJSDate();
-        } catch (error) {
-            console.error(`Date parsing error for ${this.page.inputPath}:`, error.message);
-            // fallback to current date in TIME_ZONE
-            return DateTime.now().setZone(TIME_ZONE).startOf("day").toJSDate();
-        }
-    });
-    
     eleventyConfig.setLayoutsDirectory("_layouts");
 
     eleventyConfig.addPassthroughCopy("img");
@@ -48,155 +13,18 @@ module.exports = function (eleventyConfig) {
     eleventyConfig.addPassthroughCopy("robots.txt");
     eleventyConfig.addPassthroughCopy("roms");
 
-    const defaultLanguage = "en";
-    // expose as global site data for templates
+    // add global site data for templates
+    // TODO: move _config/utils.js and global site data to _data/meta.toml
     eleventyConfig.addGlobalData("site", {
         defaultLocale: defaultLanguage
     });
 
-    eleventyConfig.addNunjucksFilter("values", obj => Object.values(obj));
-
-    eleventyConfig.addFilter("i18n_filter", function (collection, limit = null) {
-        const lang = this.page.lang; // access page.lang from context
-        let filtered = collection.filter(item => item.data.lang === lang);
-        if (limit !== null) {
-            filtered = filtered.slice(0, limit);
-        }
-        return filtered;
-    });
-
-    eleventyConfig.addFilter("date", function (dateObj, format = "dd/MM/yyyy") {
-        let dt = dateObj;
-        // handle string dates
-        if (typeof dateObj === "string") {
-            dt = DateTime.fromISO(dateObj, { zone: TIME_ZONE }).toJSDate();
-        }
-        // handle DateTime objects (from addDateParsing)
-        if (dateObj instanceof DateTime) {
-            dt = dateObj.toJSDate();
-        }
-        // check dt as valid Date object
-        if (!(dt instanceof Date) || isNaN(dt)) {
-            console.log("Invalid date input:", dateObj);
-            return "";
-        }
-        // format in TIME_ZONE
-        const formatted = DateTime.fromJSDate(dt, { zone: TIME_ZONE })
-            .toFormat(format);
-        console.log("Date input:", dt, "Formatted:", formatted, "Timezone:", TIME_ZONE);
-        return formatted;
-    });
-
-    eleventyConfig.addPlugin(eleventySass);
-    eleventyConfig.addPlugin(I18nPlugin, {
-        defaultLanguage: defaultLanguage,
-        errorMode: "allow-fallback", // /en/ -> /
-    });
-    eleventyConfig.addDataExtension("toml", (contents) => toml.parse(contents));
-
-    const translationsToml = fs.readFileSync(
-        path.join(__dirname, "_data", "locale.toml"),
-        "utf-8"
-    );
-    const translations = toml.parse(translationsToml);
-
-    const LOCALE_URL_DEBUG = process.env.LOCALE_URL_DEBUG === "1" || process.env.LOCALE_URL_DEBUG === "true";
-
-    eleventyConfig.addNunjucksFilter("locale_url_resolve", function (targetUrl, desiredLocale) {
-        const ctx = (this && this.ctx) ? this.ctx : {};
-        const collections = (ctx.collections) ? ctx.collections : {};
-        const all = collections.all || [];
-
-        if (!targetUrl || typeof targetUrl !== "string") return targetUrl;
-        if (!targetUrl.startsWith("/")) return targetUrl; // external or relative link -> leave as is
-
-        // determine locale to resolve to
-        const pageLang = desiredLocale || (ctx.page && ctx.page.lang) || ctx.locale || defaultLanguage;
-
-        if (LOCALE_URL_DEBUG) {
-            console.warn(`[locale_url_resolve] resolving targetUrl="${targetUrl}" desiredLocale="${desiredLocale}" pageLang="${pageLang}"`);
-        }
-
-        // if requested locale is default, return the raw url (your default publishes to root)
-        if (pageLang === defaultLanguage) {
-            if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] requested locale is default (${defaultLanguage}) — returning raw URL "${targetUrl}"`);
-            return targetUrl;
-        }
-
-        // normalize targetUrl to ensure trailing slash for comparison
-        const normUrl = targetUrl.endsWith("/") ? targetUrl : (targetUrl + "/");
-
-        // try to find the canonical (default language) page corresponding to targetUrl
-        let canonical = all.find(p => {
-            return (p.url === normUrl || p.url === targetUrl) && p.data && p.data.lang === defaultLanguage;
-        });
-
-        // if not found, try to find any page with that url (maybe targetUrl already localized)
-        if (!canonical) {
-            canonical = all.find(p => (p.url === normUrl || p.url === targetUrl));
-        }
-
-        if (LOCALE_URL_DEBUG) {
-            if (canonical) {
-                const cs = (canonical.page && canonical.page.filePathStem) ? canonical.page.filePathStem : "(no stem)";
-                const clang = (canonical.data && canonical.data.lang) ? canonical.data.lang : "(no lang)";
-                console.warn(`[locale_url_resolve] canonical found: url="${canonical.url}" filePathStem="${cs}" lang="${clang}"`);
-            } else {
-                console.warn(`[locale_url_resolve] canonical NOT found for targetUrl="${targetUrl}". Will fallback to prefixed URL.`);
-            }
-        }
-
-        // if cannot find canonical page, fall back to a prefixed URL (best effort)
-        if (!canonical) {
-            const fallback = (`/${pageLang}${targetUrl}`).replace(/\/{2,}/g, "/");
-            if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] fallback -> "${fallback}"`);
-            return fallback;
-        }
-
-        // determine canonical filePathStem (the source input path without extension)
-        const canonicalLang = canonical.data && canonical.data.lang ? canonical.data.lang : defaultLanguage;
-        const canonicalStem = (canonical.page && canonical.page.filePathStem) ? canonical.page.filePathStem : "";
-
-        // remove the canonical lang prefix from the stem to create a "key" we can match across locales.
-        // e.g. "/en/about" -> "/about", "/es/about" -> "/about"
-        const key = canonicalStem.replace(new RegExp(`^/${canonicalLang}`), "").replace(/^\/+/, "");
-
-        if (LOCALE_URL_DEBUG) {
-            console.warn(`[locale_url_resolve] canonicalLang="${canonicalLang}" canonicalStem="${canonicalStem}" key="${key}"`);
-        }
-
-        // find the localized page whose filePathStem ends with that key and whose lang matches pageLang.
-        const localized = all.find(p => {
-            const pLang = p.data && p.data.lang;
-            const pStem = (p.page && p.page.filePathStem) ? p.page.filePathStem : "";
-            // be defensive: ensure pLang exists
-            if (!pLang) return false;
-            return pLang === pageLang && pStem.endsWith(key);
-        });
-
-        if (localized && localized.url) {
-            if (LOCALE_URL_DEBUG) {
-                const ls = (localized.page && localized.page.filePathStem) ? localized.page.filePathStem : "(no stem)";
-                console.warn(`[locale_url_resolve] localized found: url="${localized.url}" filePathStem="${ls}" lang="${localized.data.lang}"`);
-            }
-            return localized.url;
-        }
-
-        // no localized page found — fall back to prefixed path
-        const fallback2 = (`/${pageLang}${targetUrl}`).replace(/\/{2,}/g, "/");
-        if (LOCALE_URL_DEBUG) console.warn(`[locale_url_resolve] localized NOT found for key="${key}" — fallback -> "${fallback2}"`);
-        return fallback2;
-    });
-
-    eleventyConfig.addPlugin(i18n, {
-        translations,
-        fallbackLocales: {
-            "*": "en",
-        }
-    });
+    addDateParsing(eleventyConfig, { TIME_ZONE });
+    addFilters(eleventyConfig, { TIME_ZONE, defaultLanguage });
+    addPlugins(eleventyConfig, { defaultLanguage });
 
     return {
         markdownTemplateEngine: "njk",
         htmlTemplateEngine: "njk"
     }
-};
\ No newline at end of file
+};