diff --git a/open-sse/services/compression/languageDetector.ts b/open-sse/services/compression/languageDetector.ts
index 3b3aa9b002..3b515ab2bb 100644
--- a/open-sse/services/compression/languageDetector.ts
+++ b/open-sse/services/compression/languageDetector.ts
@@ -4,6 +4,7 @@ const LANGUAGE_HINTS: Record<string, RegExp[]> = {
   de: [/\b(?:ich|datei|fehler|bitte|kannst|konfiguration|danke)\b/i],
   fr: [/\b(?:fichier|erreur|merci|peux|configuration|besoin)\b/i],
   ja: [/[\u3040-\u30ff]/],
+  id: [/\b(?:saya|kamu|anda|dengan|untuk|yang|tidak|bisa|terima\s+kasih|dari)\b/i],
 };
 
 export function detectCompressionLanguage(text: string): string {
diff --git a/open-sse/services/compression/outputMode.ts b/open-sse/services/compression/outputMode.ts
index b90bf84d1a..c512c05cb1 100644
--- a/open-sse/services/compression/outputMode.ts
+++ b/open-sse/services/compression/outputMode.ts
@@ -59,6 +59,11 @@ const CAVEMAN_INSTRUCTION_BY_LANGUAGE = {
     full: `短く圧縮して回答。断片文可。技術内容、コード、エラー、URL、識別子は正確に保持。${SHARED_BOUNDARIES}`,
     ultra: `超短く回答。DB/auth/config/req/res/fn など一般的な略語は可。コード記号、API名、エラー文字列、URL、識別子は省略しない。${SHARED_BOUNDARIES}`,
   },
+  id: {
+    lite: `Jawab ringkas. Hapus pengisi, salam sopan santun, keraguan. Pertahankan istilah teknis, kode, error, URL, & identifier secara persis. ${SHARED_BOUNDARIES}`,
+    full: `Jawab sangat singkat ala caveman pintar. Hapus kata pengisi (hanya/sangat/sebenarnya), salam sopan santun. Kalimat pendek/tidak lengkap OK. Gunakan sinonim pendek. Pertahankan semua substansi teknis, kode, error, URL, & identifier secara persis. ${SHARED_BOUNDARIES}`,
+    ultra: `Jawab ultra singkat. Kompresi maksimal. Gunakan singkatan umum (DB/auth/config/req/res/fn/impl), hilangkan kata hubung, gunakan panah untuk kausalitas (X → Y). Satu kata jika cukup. Jangan singkat simbol kode, nama API, string error, URL, atau identifier. ${SHARED_BOUNDARIES}`,
+  },
 } as const;
 
 const CAVEMAN_OUTPUT_MARKER = "[OmniRoute Caveman Output Mode]";
diff --git a/open-sse/services/compression/rules/id/context.json b/open-sse/services/compression/rules/id/context.json
new file mode 100644
index 0000000000..dabc27d86c
--- /dev/null
+++ b/open-sse/services/compression/rules/id/context.json
@@ -0,0 +1,113 @@
+{
+  "language": "id",
+  "category": "context",
+  "rules": [
+    {
+      "name": "id_explanatory_prefix",
+      "pattern": "\\b(?:fungsi\\s+ini\\s+nampaknya\\s+menangani|kode\\s+ini\\s+tampaknya|kelas\\s+ini|modul\\s+ini\\s+adalah)\\b",
+      "replacement": "Fungsi:",
+      "replacementMap": {
+        "fungsi ini nampaknya menangani": "Fungsi:",
+        "kode ini tampaknya": "Kode:",
+        "kelas ini": "Kelas:",
+        "modul ini adalah": "Modul:"
+      },
+      "context": "all",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_question_to_directive",
+      "pattern": "\\b(?:bisa\\s+jelaskan\\s+kenapa|bisa\\s+tunjukkan\\s+bagaimana|bisa\\s+beritahu\\s+saya|tolong\\s+beritahu\\s+ke|tolong\\s+jelasin\\s+kenapa|tolong\\s+infoin|kasih\\s+tau\\s+gimana|tunjukkan\\s+cara\\s+bagaimana|tunjukkan\\s+cara)\\b",
+      "replacement": "Jelaskan kenapa ",
+      "replacementMap": {
+        "bisa jelaskan kenapa": "Jelaskan kenapa ",
+        "bisa tunjukkan bagaimana": "Tunjukkan bagaimana ",
+        "bisa beritahu saya": "Beritahu saya ",
+        "tolong beritahu ke": "Beritahu ",
+        "tolong jelasin kenapa": "Jelaskan kenapa ",
+        "tolong infoin": "Info ",
+        "kasih tau gimana": "Tunjukkan bagaimana ",
+        "tunjukkan cara bagaimana": "Tunjukkan cara ",
+        "tunjukkan cara": "Tunjukkan cara "
+      },
+      "context": "user",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_context_setup",
+      "pattern": "\\b(?:saya\\s+punya\\s+kode\\s+berikut|berikut\\s+adalah\\s+kode\\s+saya|berikut\\s+kodenya|ini\\s+kodenya|kode\\s+di\\s+bawah\\s+ini|ini\\s+filenya|berikut\\s+isi\\s+filenya|berikut\\s+isi\\s+berkasnya|berikut\\s+kodenya)\\b\\s*[:.]?\\s*",
+      "replacement": "Kode:",
+      "context": "user",
+      "category": "context",
+      "minIntensity": "lite",
+      "replacementMap": {
+        "saya punya kode berikut": "Kode:",
+        "berikut adalah kode saya": "Kode:",
+        "berikut kodenya": "Kode:",
+        "ini kodenya": "Kode:",
+        "kode di bawah ini": "Kode:",
+        "ini filenya": "File:",
+        "berikut isi filenya": "File:",
+        "berikut isi berkasnya": "File:"
+      }
+    },
+    {
+      "name": "id_intent_clarification",
+      "pattern": "\\b(?:apa\\s+yang\\s+sedang\\s+saya\\s+coba\\s+lakukan\\s+adalah|tujuan\\s+saya\\s+adalah\\s+untuk|yang\\s+saya\\s+butuhkan\\s+adalah|saya\\s+menargetkan\\s+untuk|gw\\s+mau|gua\\s+mau|saya\\s+pengen|aku\\s+ingin)\\b\\s*",
+      "replacement": "Tujuan:",
+      "context": "user",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_background_removal",
+      "pattern": "\\b(?:seperti\\s+yang\\s+anda\\s+ketahui|seperti\\s+yang\\s+kita\\s+diskusikan\\s+sebelumnya)\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_meta_commentary",
+      "pattern": "^(?:catat\\s+bahwa|perlu\\s+diingat\\s+bahwa|ingat\\s+bahwa)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_purpose_statement",
+      "pattern": "\\b(?:dengan\\s+tujuan\\s+untuk|dalam\\s+upaya\\s+untuk|untuk\\s+setiap)\\b",
+      "replacement": "untuk",
+      "replacementMap": {
+        "dengan tujuan untuk": "untuk",
+        "dalam upaya untuk": "untuk",
+        "untuk setiap": "per"
+      },
+      "context": "all",
+      "category": "context",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_conversational_connectors",
+      "pattern": "\\b(?:pertama-tama|kedua|selanjutnya|lalu|kemudian|di\\s+samping\\s+itu|oleh\\s+karena\\s+itu|maka\\s+dari\\s+itu|dengan\\s+kata\\s+lain|sebagai\\s+catatan)\\b",
+      "replacementMap": {
+        "pertama-tama": "1.",
+        "kedua": "2.",
+        "selanjutnya": "lalu",
+        "lalu": ">",
+        "kemudian": ">",
+        "di samping itu": "juga",
+        "oleh karena itu": "jadi",
+        "maka dari itu": "jadi",
+        "dengan kata lain": "artinya",
+        "sebagai catatan": "catatan:"
+      },
+      "context": "all",
+      "category": "context",
+      "minIntensity": "lite"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/open-sse/services/compression/rules/id/dedup.json b/open-sse/services/compression/rules/id/dedup.json
new file mode 100644
index 0000000000..875880c5a4
--- /dev/null
+++ b/open-sse/services/compression/rules/id/dedup.json
@@ -0,0 +1,38 @@
+{
+  "language": "id",
+  "category": "dedup",
+  "rules": [
+    {
+      "name": "id_repeated_context",
+      "pattern": "\\b(?:seperti\\s+yang\\s+kita\\s+diskusikan\\s+tadi|seperti\\s+yang\\s+disebutkan\\s+taraf\\s+awal|seperti\\s+dijelaskan\\s+sebelumnya|seperti\\s+saya\\s+katakan\\s+tadi|sebelumnya\\s+sudah\\s+saya\\s+jelaskan|seperti\\s+yang\\s+saya\\s+sebutkan\\s+tadi|seperti\\s+yang\\s+sudah\\s+dibahas|seperti\\s+yang\\s+dibilang\\s+sebelumnya)\\b[,.]?\\s*",
+      "replacement": "Sama seperti di atas. ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_repeated_question",
+      "pattern": "\\b(?:pertanyaan\\s+yang\\s+sama\\s+seperti\\s+sebelumnya|saya\\s+tanya\\s+ini\\s+tadi|ini\\s+pertanyaan\\s+yang\\s+sama)\\b[,.]?\\s*",
+      "replacement": "[pertanyaan sama] ",
+      "context": "user",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_reestablished_context",
+      "pattern": "\\b(?:kembali\\s+ke\\s+kode\\s+di\\s+atas|merujuk\\s+kembali\\s+ke|kembali\\s+ke|kembali\\s+ke\\s+pembahasan|kembali\\s+ke\\s+topik|balik\\s+lagi\\s+ke|kembali\\s+membahas)\\b\\s*",
+      "replacement": "Re: ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_summary_replacement",
+      "pattern": "\\b(?:untuk\\s+meringkas\\s+apa\\s+yang\\s+kita\\s+bahas|ringkasan\\s+dari\\s+diskusi\\s+kita|singkatnya|singkat\\s+cerita|kesimpulannya|intisarinya)\\b[,.]?\\s*",
+      "replacement": "Summary: ",
+      "context": "assistant",
+      "category": "dedup",
+      "minIntensity": "lite"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/open-sse/services/compression/rules/id/filler.json b/open-sse/services/compression/rules/id/filler.json
new file mode 100644
index 0000000000..3b2ecb2328
--- /dev/null
+++ b/open-sse/services/compression/rules/id/filler.json
@@ -0,0 +1,138 @@
+{
+  "language": "id",
+  "category": "filler",
+  "rules": [
+    {
+      "name": "id_pleasantries",
+      "pattern": "\\b(?:terima\\s+kasih\\s+banyak|terima\\s+kasih|makasih\\s+banyak|makasih|suwun|hatur\\s+nuhun|nuhun|mohon\\s+bantuannya|tolong\\s+bantuannya|sama-sama|terima\\s+kasih\\s+kembali|kembali|sama\\s+sama|sangat\\s+membantu|senang\\s+membantu|salam\\s+hangat|semoga\\s+membantu|semoga\\s+bermanfaat|terima\\s+kasih\\s+banyak\\s+ya|makasih\\s+ya)\\b[,.!?\\s]*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_polite_framing",
+      "pattern": "\\b(?:mohon\\s+info|mohon|tolong|tolong\\s+dong|tlg|tolong\\s+buatkan|saya\\s+ingin\\s+meminta|saya\\s+ingin|ingin\\s+meminta|bisa\\s+tolong|tolong\\s+jelaskan|tolong\\s+tunjukkan|minta\\s+tolong|tolongin|mohon\\s+bantu|mohon\\s+bantuan)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_hedging",
+      "pattern": "\\b(?:sepertinya|tampaknya|mungkin|rasanya|kiranya|kurang\\s+lebih|bisa\\s+jadi|seolah-olah|seolah|kelihatannya)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_verbose_instructions",
+      "pattern": "\\b(?:berikan\\s+penjelasan\\s+rinci\\s+tentang|berikan\\s+penjelasan\\s+detail\\s+tentang|jelaskan\\s+secara\\s+rinci|jelaskan\\s+secara\\s+detail|tuliskan\\s+secara\\s+lengkap|secara\\s+mendetail|secara\\s+mendalam|secara\\s+rinci|secara\\s+detail)\\b\\s*",
+      "replacement": "jelaskan ",
+      "replacementMap": {
+        "berikan penjelasan rinci tentang": "jelaskan ",
+        "berikan penjelasan detail tentang": "jelaskan ",
+        "jelaskan secara rinci": "jelaskan ",
+        "jelaskan secara detail": "jelaskan ",
+        "tuliskan secara lengkap": "tulis ",
+        "secara mendetail": "",
+        "secara mendalam": "",
+        "secara rinci": "",
+        "secara detail": ""
+      },
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_filler_adverbs",
+      "pattern": "\\b(?:pada\\s+dasarnya|sebenarnya|secara\\s+harfiah|gampangnya|mudahnya|sederhananya|saat\\s+ini|sekarang|cuma|hanya)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_filler_phrases",
+      "pattern": "^(?:saya\\s+ingin|saya\\s+butuh|saya\\s+mau|saya\\s+sedang\\s+mencari|tujuan\\s+saya|rencana\\s+saya)\\b\\s*",
+      "replacement": "",
+      "context": "user",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_redundant_openers",
+      "pattern": "^(?:halo\\s+gan|halo\\s+min|halo|hai|hi|hey|heyy|selamat\\s+pagi|selamat\\s+siang|selamat\\s+sore|selamat\\s+malam|permisi|assalamualaikum|assalamu\\'alaikum|assalamualaikum\\s+wr\\s+wb|salam\\s+sejahtera|permisi\\s+(?:kak|gan|sis|bro|mas|bang|min)|permisi\\s+semuanya|halo\\s+(?:bro|kak|sis|guys|kawan))\\b\\s*[,.!?\\s]?\\s*",
+      "replacement": "",
+      "context": "user",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_verbose_requests",
+      "pattern": "\\b(?:saya\\s+penasaran\\s+apakah|apakah\\s+memungkinkan\\s+untuk|apakah\\s+bisa|apakah\\s+mungkin)\\b\\s*",
+      "replacement": "",
+      "context": "user",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_self_reference",
+      "pattern": "^(?:saya|gw|gua|gue|aku|kita|ane)\\s+(?:sedang|lagi|masih)(?:\\s+(?:mencoba\\s+untuk|mengerjakan))?\\b\\s*",
+      "replacement": "",
+      "context": "user",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_qualifier_removal",
+      "pattern": "\\b(?:sedikit|agak|terkadang|kadang-kadang|kadang|semacam)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_softeners",
+      "pattern": "\\b(?:jika\\s+memungkinkan|kalau\\s+bisa|kalau\\s+sempat|bila\\s+berkenan|sekadar\\s+bertanya)\\b[,.!?\\s]*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_uncertainty_fillers",
+      "pattern": "\\b(?:saya\\s+rasa|saya\\s+kira|kurang\\s+lebih|kira-kira|kira\\s+kira)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_assistant_fillers",
+      "pattern": "^(?:berikut\\s+adalah|berikut|ini\\s+adalah|bawah\\s+ini\\s+adalah)\\s+",
+      "replacement": "",
+      "context": "assistant",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_discourse_fillers",
+      "pattern": "\\b(?:kebetulan|sekadar|sekedar|sejujurnya|secara\\s+pribadi|rupanya|pada\\s+intinya|intinya|singkat\\s+kata|omong-omong|ngomong-ngomong|btw|fyi|asalkan|asal)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_particles_removal",
+      "pattern": "\\b(?:dong|deh|sih|kok|loh|lah|tah|kah|pun|tuh|si|kek|ya)\\b",
+      "flags": "gi",
+      "replacement": "",
+      "context": "all",
+      "category": "filler",
+      "minIntensity": "lite"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/open-sse/services/compression/rules/id/structural.json b/open-sse/services/compression/rules/id/structural.json
new file mode 100644
index 0000000000..15d14d27e2
--- /dev/null
+++ b/open-sse/services/compression/rules/id/structural.json
@@ -0,0 +1,111 @@
+{
+  "language": "id",
+  "category": "structural",
+  "rules": [
+    {
+      "name": "id_redundant_phrasing",
+      "pattern": "\\b(?:pastikan\\s+untuk|harus\\s+dipastikan|perlu\\s+untuk|dianjurkan\\s+untuk|disarankan\\s+untuk|wajib\\s+untuk)\\b\\s*",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full",
+      "replacementMap": {
+        "pastikan untuk": "pastikan ",
+        "harus dipastikan": "pastikan ",
+        "perlu untuk": "perlu ",
+        "dianjurkan untuk": "dianjurkan ",
+        "disarankan untuk": "disarankan ",
+        "wajib untuk": "wajib "
+      }
+    },
+    {
+      "name": "id_redundant_because",
+      "pattern": "\\b(?:dikarenakan\\s+adanya\\s+fakta\\s+bahwa|alasan\\s+utamanya\\s+adalah\\s+karena|oleh\\s+karena\\s+fakta\\s+bahwa|disebabkan\\s+oleh\\s+karena|karena\\s+alasan\\s+bahwa)\\b\\s*",
+      "replacement": "karena ",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_redundant_directive",
+      "pattern": "\\b(?:penting\\s+untuk|anda\\s+seharusnya|ingat\\s+untuk)\\b\\s*",
+      "replacement": "",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_list_conjunction",
+      "pattern": ",\\s*dan\\s+juga\\s+|,\\s*serta\\s+|,\\s*maupun\\s+juga\\s*",
+      "replacement": ", ",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_purpose_phrases",
+      "pattern": "\\b(?:agar\\s+bisa\\s+untuk|supaya\\s+bisa\\s+untuk|bertujuan\\s+untuk)\\b\\s*",
+      "replacement": "untuk ",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_redundant_quantifiers",
+      "pattern": "\\b(?:masing-masing\\s+dan\\s+setiap|tiap-tiap\\s+dan\\s+setiap)\\b",
+      "replacement": "setiap",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_all_quantifier",
+      "pattern": "\\bapapun\\s+dan\\s+semua\\b",
+      "replacement": "semua",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_verbose_connectors",
+      "pattern": "\\b(?:selain\\s+itu|lebih\\s+lanjut\\s+lagi|tambahan\\s+lagi|dan\\s+juga)\\b\\s*",
+      "replacement": "juga ",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_transition_removal",
+      "pattern": "^(?:Di\\s+sisi\\s+lain,?\\s*|Sebaliknya,?\\s*|Namun,?\\s*|Akan\\s+tetapi,?\\s*)",
+      "replacement": "",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_emphasis_removal",
+      "pattern": "\\b(?:sangat|sekali|amat|luar\\s+biasa|sungguh)\\s+(?=[a-z])",
+      "replacement": "",
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "id_passive_voice",
+      "pattern": "\\b(?:sedang\\s+digunakan|sedang\\s+dipanggil|sedang\\s+dibuat|telah\\s+dibuat|telah\\s+diterapkan|sedang\\s+dijalankan|sedang\\s+diuji|telah\\s+diimplementasikan)\\b",
+      "replacement": "pakai",
+      "replacementMap": {
+        "sedang digunakan": "pakai",
+        "sedang dipanggil": "panggil",
+        "sedang dibuat": "buat",
+        "telah dibuat": "buat",
+        "telah diterapkan": "terapkan",
+        "sedang dijalankan": "jalan",
+        "sedang diuji": "uji",
+        "telah diimplementasikan": "terapkan"
+      },
+      "context": "all",
+      "category": "structural",
+      "minIntensity": "full"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/open-sse/services/compression/rules/id/ultra.json b/open-sse/services/compression/rules/id/ultra.json
new file mode 100644
index 0000000000..be0f0cc2fe
--- /dev/null
+++ b/open-sse/services/compression/rules/id/ultra.json
@@ -0,0 +1,252 @@
+{
+  "language": "id",
+  "category": "ultra",
+  "rules": [
+    {
+      "name": "id_articles_removal",
+      "pattern": "\\b(?:itu|tersebut|ini)\\s+(?=[a-z])",
+      "flags": "g",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_leader_phrases",
+      "pattern": "^(?:saya\\s+akan|saya\\s+bisa|biarkan\\s+saya|kamu\\s+bisa|kita\\s+bisa|mari|mari\\s+kita)\\s+(?=[a-z])",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "id_ultra_abbreviations",
+      "pattern": "\\b(?:basis\\s+data|database)\\b",
+      "replacement": "DB",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_config_abbreviation",
+      "pattern": "\\b(?:konfigurasi|pengaturan)\\b",
+      "replacement": "config",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_function_abbreviation",
+      "pattern": "\\b(?:fungsi|metode)\\b",
+      "replacement": "fn",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_request_abbreviation",
+      "pattern": "\\b(?:permintaan|request)\\b",
+      "replacement": "req",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_response_abbreviation",
+      "pattern": "\\b(?:tanggapan|respons|jawaban|response)\\b",
+      "replacement": "res",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_implementation_abbreviation",
+      "pattern": "\\b(?:implementasi|penerapan)\\b",
+      "replacement": "impl",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_authentication_abbreviation",
+      "pattern": "\\b(?:auten|autentikasi|otentikasi|authentication)\\b",
+      "replacement": "auth",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_authorization_abbreviation",
+      "pattern": "\\b(?:otorisasi|authorization)\\b",
+      "replacement": "authz",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_application_abbreviation",
+      "pattern": "\\b(?:aplikasi|program|application)\\b",
+      "replacement": "app",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "id_ultra_dependency_abbreviation",
+      "pattern": "\\b(?:ketergantungan|depedensi|dependensi|dependencies)\\b",
+      "replacement": "dep",
+      "replacementMap": {
+        "ketergantungan": "dep",
+        "depedensi": "dep",
+        "dependensi": "dep",
+        "dependencies": "deps"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ultra_id_common_shortenings",
+      "pattern": "\\b(?:yang|untuk|dengan|adalah|tidak|sebagai|dari|dan|bisa|atau|dalam|oleh|pada|sudah|belum|akan|juga|karena|setelah|sebelum|terhadap|tentang|secara|seperti|bahwa|hanya|cuma|saja|bagaimana|mengapa|kenapa|apakah|sebagaimana|agar|supaya|bahwasanya)\\b",
+      "flags": "gi",
+      "replacementMap": {
+        "yang": "yg",
+        "untuk": "utk",
+        "dengan": "dg",
+        "adalah": "=",
+        "tidak": "gk",
+        "sebagai": "sbg",
+        "dari": "dr",
+        "dan": "&",
+        "bisa": "bs",
+        "atau": "/",
+        "dalam": "dlm",
+        "oleh": "olh",
+        "pada": "pd",
+        "sudah": "sdh",
+        "belum": "blm",
+        "akan": "akn",
+        "juga": "jg",
+        "karena": "krn",
+        "setelah": "stlh",
+        "sebelum": "sblm",
+        "terhadap": "thd",
+        "tentang": "ttg",
+        "secara": "scr",
+        "seperti": "spt",
+        "bahwa": "bwh",
+        "hanya": "hnya",
+        "cuma": "cma",
+        "saja": "aja",
+        "bagaimana": "gmn",
+        "mengapa": "knp",
+        "kenapa": "knp",
+        "apakah": "apa",
+        "sebagaimana": "sbgmn",
+        "agar": "agr",
+        "supaya": "spya",
+        "bahwasanya": "bwhsnya"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ultra_id_technical_shortenings",
+      "pattern": "\\b(?:informasi|parameter|argumen|variabel|nilai|alamat|nomor|jumlah|indeks|sumber|tujuan|berkas|kesalahan|pesan|pengguna|sistem|klien|server|jaringan|koneksi|pernyataan|transaksi|objek|kamus|daftar|panjang|karakter|tanggapan|autentikasi|konfigurasi)\\b",
+      "flags": "gi",
+      "replacementMap": {
+        "informasi": "info",
+        "parameter": "param",
+        "argumen": "arg",
+        "variabel": "var",
+        "nilai": "val",
+        "alamat": "addr",
+        "nomor": "no",
+        "jumlah": "qty",
+        "indeks": "idx",
+        "sumber": "src",
+        "tujuan": "dest",
+        "berkas": "file",
+        "kesalahan": "err",
+        "pesan": "msg",
+        "pengguna": "usr",
+        "sistem": "sys",
+        "klien": "cli",
+        "server": "srv",
+        "jaringan": "net",
+        "koneksi": "conn",
+        "pernyataan": "stmt",
+        "transaksi": "tx",
+        "objek": "obj",
+        "kamus": "dict",
+        "daftar": "list",
+        "panjang": "len",
+        "karakter": "char",
+        "tanggapan": "res",
+        "autentikasi": "auth",
+        "konfigurasi": "config"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ultra_id_slang_abbreviations",
+      "pattern": "\\b(?:gimana|kenapa|sekarang|sebentar|cepat|langsung|tapi|terus|banget|terlalu|banyak|sedikit|masalah|tambah|kurang|mungkin|melihat|buat|buatkan|pakai|dulu|nanti|kasih|tanya|minta|tolong|kirim|simpan|kerja|selesai|eror|website|aplikasi|database|kembali|iya|oke|tidak|jangan|pengen|gua|gue|lu|ente|kamu|aku|saya)\\b",
+      "flags": "gi",
+      "replacementMap": {
+        "gimana": "gmn",
+        "kenapa": "knp",
+        "sekarang": "skrg",
+        "sebentar": "bntr",
+        "cepat": "cpt",
+        "langsung": "lsg",
+        "tapi": "tp",
+        "terus": "trus",
+        "banget": "bgt",
+        "terlalu": "trl",
+        "banyak": "bnyk",
+        "sedikit": "sdkt",
+        "masalah": "mslh",
+        "tambah": "tmbh",
+        "kurang": "krg",
+        "mungkin": "mgkn",
+        "melihat": "lht",
+        "buat": "bwt",
+        "buatkan": "bwt",
+        "pakai": "pake",
+        "dulu": "dlu",
+        "nanti": "nti",
+        "kasih": "ksh",
+        "tanya": "tny",
+        "minta": "mnt",
+        "tolong": "tlg",
+        "kirim": "krm",
+        "simpan": "smpn",
+        "kerja": "krj",
+        "selesai": "sls",
+        "eror": "err",
+        "website": "web",
+        "aplikasi": "app",
+        "database": "DB",
+        "kembali": "ret",
+        "iya": "y",
+        "oke": "ok",
+        "tidak": "gk",
+        "jangan": "jgn",
+        "pengen": "mau",
+        "gua": "gw",
+        "gue": "gw",
+        "lu": "lo",
+        "ente": "lo",
+        "kamu": "lo",
+        "aku": "gw",
+        "saya": "gw"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/unit/compression/language-packs.test.ts b/tests/unit/compression/language-packs.test.ts
index 114bddadef..61b6936851 100644
--- a/tests/unit/compression/language-packs.test.ts
+++ b/tests/unit/compression/language-packs.test.ts
@@ -9,10 +9,10 @@ import {
 import { applyRulesToText } from "../../../open-sse/services/compression/caveman.ts";
 import { getRulesForContext } from "../../../open-sse/services/compression/cavemanRules.ts";
 
-const LANGUAGES = ["pt-BR", "es", "de", "fr", "ja"];
+const LANGUAGES = ["pt-BR", "es", "de", "fr", "ja", "id"];
 
 describe("Caveman language packs", () => {
-  it("ships 5 language packs with at least 15 rules each", () => {
+  it("ships 6 language packs with at least 15 rules each", () => {
     for (const language of LANGUAGES) {
       const rules = loadAllRulesForLanguage(language, { refresh: true });
       assert.ok(rules.length >= 15, `${language} expected 15+ rules, got ${rules.length}`);
@@ -37,6 +37,7 @@ describe("Caveman language packs", () => {
     assert.equal(detectCompressionLanguage("ich brauche diese konfiguration"), "de");
     assert.equal(detectCompressionLanguage("j'ai besoin de corriger cette erreur fichier"), "fr");
     assert.equal(detectCompressionLanguage("このコードを修正してください"), "ja");
+    assert.equal(detectCompressionLanguage("bisa tolong jelaskan tentang database ini"), "id");
   });
 
   it("applies non-English rule packs to golden samples", () => {
@@ -79,6 +80,20 @@ describe("Caveman language packs", () => {
     assert.ok(text.includes("src/auth.ts"));
   });
 
+  it("applies Indonesian rules without touching technical terms", () => {
+    const idRules = getRulesForContext("user", "ultra", "id");
+    const { text } = applyRulesToText(
+      "Tolong berikan penjelasan detail tentang basis data dan autentikasi di src/auth.ts",
+      idRules
+    );
+
+    assert.ok(!text.toLowerCase().includes("tolong"));
+    assert.ok(!text.toLowerCase().includes("penjelasan detail"));
+    assert.ok(text.includes("DB"));
+    assert.ok(text.includes("auth"));
+    assert.ok(text.includes("src/auth.ts"));
+  });
+
   it("builds localized output mode instructions", () => {
     const config = { enabled: true, intensity: "full" as const, autoClarity: true };
 
@@ -87,5 +102,6 @@ describe("Caveman language packs", () => {
     assert.match(buildCavemanOutputInstruction(config, "de"), /Antworte/);
     assert.match(buildCavemanOutputInstruction(config, "fr"), /Reponds/);
     assert.match(buildCavemanOutputInstruction(config, "ja"), /回答/);
+    assert.match(buildCavemanOutputInstruction(config, "id"), /Jawab/);
   });
 });