diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3837e60421..cc150af447 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,10 @@
 - **db (import):** fix `EBUSY: resource busy or locked` when importing a database on **Windows**. The import route deleted the live `storage.sqlite` + WAL/`-shm`/`-journal` sidecars with a plain `fs.unlinkSync` immediately after `resetDbInstance()`, but Windows releases the SQLite file handle asynchronously after `close()` (mmap / antivirus), so the unlink raced and threw `EBUSY`. The route now deletes via `unlinkFileWithRetry` (EBUSY/EPERM backoff) — the same helper the restore path already uses. Regression guard in `tests/unit/db-import-ebusy-5406.test.ts`. ([#5406](https://github.com/diegosouzapw/OmniRoute/issues/5406), consolidated under [#5161](https://github.com/diegosouzapw/OmniRoute/issues/5161))
 - **compression (pipeline):** add an honest default-on **inflation guard** to the stacked compression pipeline (T02 / Headroom H1). If the fully-stacked engines produce a body that did not actually shrink — its token count is `>=` the original — the compressed body is discarded and the verbatim original request is sent upstream instead, with a `pipeline-inflation-guard` warning recorded in the compression stats. This is safe by construction (the only fallback is the unmodified original, always a valid payload) and complements the existing opt-in per-step TV1 bail-out, which governs step-to-step advancement rather than the final output. New `open-sse/services/compression/pipelineGuards.ts`; wired at the single `finalizeStackedResult` choke point shared by the sync and async stacked paths. Regression guards (incl. an inflating-engine integration test) in `tests/unit/compression-pipeline-inflation-guard.test.ts`.
 
+### ✨ New Features
+
+- **compression (caveman):** complete the German, French, and Japanese rule packs with the `dedup` (repeated-context collapsing) and `ultra` (abbreviation / terse) categories they were missing — these three languages previously shipped only `context`/`filler`/`structural`, while `en`/`es`/`id`/`pt-BR` had all five. So a de/fr/ja conversation compressed at higher intensities now collapses repeated boilerplate ("wie bereits besprochen" → "Siehe oben.", "comme mentionné précédemment" → "Voir ci-dessus.", "前述のとおり" → "（上記参照）") and abbreviates dense technical vocabulary (`Datenbank`→`DB`, `Authentifizierung`→`Auth`; `base de données`→`BD`, `authentification`→`auth`; `データベース`→`DB`, `アプリケーション`→`app`). Patterns mirror the existing `es` pack and stay ReDoS-safe (bounded literal alternations; the CJK pack uses no `\b` since Japanese has no word boundaries). Regression guard: `tests/unit/caveman-packs-de-fr-ja.test.ts` (packs load + validate + shrink a representative sample). gaps v3.8.42 — T05/C2.
+
 ---
 
 ## [3.8.41] — 2026-06-29
diff --git a/open-sse/services/compression/rules/de/dedup.json b/open-sse/services/compression/rules/de/dedup.json
new file mode 100644
index 0000000000..057c376e73
--- /dev/null
+++ b/open-sse/services/compression/rules/de/dedup.json
@@ -0,0 +1,38 @@
+{
+  "language": "de",
+  "category": "dedup",
+  "rules": [
+    {
+      "name": "de_repeated_context",
+      "pattern": "\\b(?:wie bereits besprochen|wie zuvor erwähnt|wie bereits erwähnt|wie ich bereits sagte)\\b[,.]?\\s*",
+      "replacement": "Siehe oben. ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "de_repeated_question",
+      "pattern": "\\b(?:dieselbe Frage wie zuvor|das habe ich bereits gefragt|das ist dieselbe Frage)\\b[,.]?\\s*",
+      "replacement": "[gleiche Frage] ",
+      "context": "user",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "de_reestablished_context",
+      "pattern": "\\b(?:zurück zum obigen Code|bezugnehmend auf|zurückkommend auf)\\b\\s*",
+      "replacement": "Re: ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "de_summary_replacement",
+      "pattern": "\\b(?:um zusammenzufassen was wir besprochen haben|zusammenfassend unser Gespräch|um es zusammenzufassen)\\b[,.]?\\s*",
+      "replacement": "Zusammenfassung: ",
+      "context": "assistant",
+      "category": "dedup",
+      "minIntensity": "lite"
+    }
+  ]
+}
diff --git a/open-sse/services/compression/rules/de/ultra.json b/open-sse/services/compression/rules/de/ultra.json
new file mode 100644
index 0000000000..4b5a140bc9
--- /dev/null
+++ b/open-sse/services/compression/rules/de/ultra.json
@@ -0,0 +1,107 @@
+{
+  "language": "de",
+  "category": "ultra",
+  "rules": [
+    {
+      "name": "de_articles",
+      "pattern": "\\b(?:[Dd]er|[Dd]ie|[Dd]as|[Dd]en|[Dd]em|[Dd]es|[Ee]in|[Ee]ine|[Ee]inen|[Ee]inem|[Ee]iner|[Ee]ines)\\s+(?=[a-zäöüß])",
+      "flags": "g",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "de_leader_phrases",
+      "pattern": "^(?:ich werde|ich kann|ich würde|lass mich|wir werden|wir können|lass uns)\\s+(?=[a-zäöüß])",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "de_ultra_database_abbreviation",
+      "pattern": "\\bDatenbank\\b",
+      "replacement": "DB",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_config_abbreviation",
+      "pattern": "\\bKonfiguration\\b",
+      "replacement": "Konfig",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_function_abbreviation",
+      "pattern": "\\bFunktion\\b",
+      "replacement": "Fn",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_request_abbreviation",
+      "pattern": "\\b(?:Anfrage|Anforderung)\\b",
+      "replacement": "Req",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_response_abbreviation",
+      "pattern": "\\bAntwort\\b",
+      "replacement": "Res",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_implementation_abbreviation",
+      "pattern": "\\bImplementierung\\b",
+      "replacement": "Impl",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_authentication_abbreviation",
+      "pattern": "\\bAuthentifizierung\\b",
+      "replacement": "Auth",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_authorization_abbreviation",
+      "pattern": "\\bAutorisierung\\b",
+      "replacement": "Authz",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_application_abbreviation",
+      "pattern": "\\b(?:Anwendung|Applikation)\\b",
+      "replacement": "App",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "de_ultra_dependency_abbreviation",
+      "pattern": "\\b(?:Abhängigkeit|Abhängigkeiten)\\b",
+      "replacement": "Dep",
+      "replacementMap": {
+        "Abhängigkeit": "Dep",
+        "Abhängigkeiten": "Deps"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    }
+  ]
+}
diff --git a/open-sse/services/compression/rules/fr/dedup.json b/open-sse/services/compression/rules/fr/dedup.json
new file mode 100644
index 0000000000..75222cfa01
--- /dev/null
+++ b/open-sse/services/compression/rules/fr/dedup.json
@@ -0,0 +1,38 @@
+{
+  "language": "fr",
+  "category": "dedup",
+  "rules": [
+    {
+      "name": "fr_repeated_context",
+      "pattern": "\\b(?:comme discuté précédemment|comme mentionné précédemment|comme indiqué précédemment|comme je l'ai dit avant)\\b[,.]?\\s*",
+      "replacement": "Voir ci-dessus. ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "fr_repeated_question",
+      "pattern": "\\b(?:même question qu'avant|j'ai déjà posé cette question|c'est la même question)\\b[,.]?\\s*",
+      "replacement": "[même question] ",
+      "context": "user",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "fr_reestablished_context",
+      "pattern": "\\b(?:revenons au code ci-dessus|en référence à|revenant à)\\b\\s*",
+      "replacement": "Re: ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "fr_summary_replacement",
+      "pattern": "\\b(?:pour résumer ce que nous avons discuté|en résumé de notre conversation|pour récapituler)\\b[,.]?\\s*",
+      "replacement": "Résumé: ",
+      "context": "assistant",
+      "category": "dedup",
+      "minIntensity": "lite"
+    }
+  ]
+}
diff --git a/open-sse/services/compression/rules/fr/ultra.json b/open-sse/services/compression/rules/fr/ultra.json
new file mode 100644
index 0000000000..3c1f88562c
--- /dev/null
+++ b/open-sse/services/compression/rules/fr/ultra.json
@@ -0,0 +1,107 @@
+{
+  "language": "fr",
+  "category": "ultra",
+  "rules": [
+    {
+      "name": "fr_articles",
+      "pattern": "\\b(?:[Ll]e|[Ll]a|[Ll]es|[Uu]n|[Uu]ne|[Dd]es|[Dd]u)\\s+(?=[a-zàâçéèêëîïôûùüÿœ])",
+      "flags": "g",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "fr_leader_phrases",
+      "pattern": "^(?:je vais|je peux|nous allons|nous pouvons|laisse-moi|on peut)\\s+(?=[a-zàâçéèêëîïôûùüÿœ])",
+      "replacement": "",
+      "context": "all",
+      "category": "terse",
+      "minIntensity": "full"
+    },
+    {
+      "name": "fr_ultra_database_abbreviation",
+      "pattern": "\\bbase de données\\b",
+      "replacement": "BD",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_config_abbreviation",
+      "pattern": "\\bconfiguration\\b",
+      "replacement": "config",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_function_abbreviation",
+      "pattern": "\\bfonction\\b",
+      "replacement": "fn",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_request_abbreviation",
+      "pattern": "\\b(?:requête|demande)\\b",
+      "replacement": "req",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_response_abbreviation",
+      "pattern": "\\bréponse\\b",
+      "replacement": "rép",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_implementation_abbreviation",
+      "pattern": "\\bimplémentation\\b",
+      "replacement": "impl",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_authentication_abbreviation",
+      "pattern": "\\bauthentification\\b",
+      "replacement": "auth",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_authorization_abbreviation",
+      "pattern": "\\bautorisation\\b",
+      "replacement": "authz",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_application_abbreviation",
+      "pattern": "\\bapplication\\b",
+      "replacement": "app",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "fr_ultra_dependency_abbreviation",
+      "pattern": "\\b(?:dépendance|dépendances)\\b",
+      "replacement": "dép",
+      "replacementMap": {
+        "dépendance": "dép",
+        "dépendances": "déps"
+      },
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    }
+  ]
+}
diff --git a/open-sse/services/compression/rules/ja/dedup.json b/open-sse/services/compression/rules/ja/dedup.json
new file mode 100644
index 0000000000..e9674c2e44
--- /dev/null
+++ b/open-sse/services/compression/rules/ja/dedup.json
@@ -0,0 +1,38 @@
+{
+  "language": "ja",
+  "category": "dedup",
+  "rules": [
+    {
+      "name": "ja_repeated_context",
+      "pattern": "(?:前述のとおり|前に述べたように|以前述べたように|先ほど言ったように)",
+      "replacement": "（上記参照）",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "ja_repeated_question",
+      "pattern": "(?:前と同じ質問ですが|これは前と同じ質問です|先ほどと同じ質問ですが)",
+      "replacement": "［同じ質問］",
+      "context": "user",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "ja_reestablished_context",
+      "pattern": "(?:上記のコードに戻ると|先ほどの話に戻ると)",
+      "replacement": "Re: ",
+      "context": "all",
+      "category": "dedup",
+      "minIntensity": "lite"
+    },
+    {
+      "name": "ja_summary_replacement",
+      "pattern": "(?:これまでの議論を要約すると|会話を要約すると|まとめると)",
+      "replacement": "要約：",
+      "context": "assistant",
+      "category": "dedup",
+      "minIntensity": "lite"
+    }
+  ]
+}
diff --git a/open-sse/services/compression/rules/ja/ultra.json b/open-sse/services/compression/rules/ja/ultra.json
new file mode 100644
index 0000000000..1deea66448
--- /dev/null
+++ b/open-sse/services/compression/rules/ja/ultra.json
@@ -0,0 +1,86 @@
+{
+  "language": "ja",
+  "category": "ultra",
+  "rules": [
+    {
+      "name": "ja_ultra_database_abbreviation",
+      "pattern": "データベース",
+      "replacement": "DB",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_config_abbreviation",
+      "pattern": "(?:コンフィギュレーション|設定)",
+      "replacement": "config",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_function_abbreviation",
+      "pattern": "関数",
+      "replacement": "fn",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_request_abbreviation",
+      "pattern": "リクエスト",
+      "replacement": "req",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_response_abbreviation",
+      "pattern": "レスポンス",
+      "replacement": "res",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_implementation_abbreviation",
+      "pattern": "実装",
+      "replacement": "impl",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_authentication_abbreviation",
+      "pattern": "認証",
+      "replacement": "auth",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_authorization_abbreviation",
+      "pattern": "認可",
+      "replacement": "authz",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_application_abbreviation",
+      "pattern": "アプリケーション",
+      "replacement": "app",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    },
+    {
+      "name": "ja_ultra_dependency_abbreviation",
+      "pattern": "依存関係",
+      "replacement": "dep",
+      "context": "all",
+      "category": "ultra",
+      "minIntensity": "ultra"
+    }
+  ]
+}
diff --git a/tests/unit/caveman-packs-de-fr-ja.test.ts b/tests/unit/caveman-packs-de-fr-ja.test.ts
new file mode 100644
index 0000000000..d0c08badb8
--- /dev/null
+++ b/tests/unit/caveman-packs-de-fr-ja.test.ts
@@ -0,0 +1,57 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import {
+  loadRulePack,
+  loadAllRulesForLanguage,
+} from "../../open-sse/services/compression/ruleLoader.ts";
+
+// T05 / C2 — caveman dedup + ultra packs for de, fr, ja (previously only context/filler/structural).
+const LANGS = ["de", "fr", "ja"] as const;
+
+// Samples chosen to contain terms the ultra pack abbreviates. For ja the katakana loanwords
+// (データベース/アプリケーション/…) are the clear character-length wins; the short-kanji rules
+// (設定→config, 認証→auth) are token wins but can be char-neutral, so they stay out of this sample.
+const ULTRA_SAMPLES: Record<(typeof LANGS)[number], string> = {
+  de: "Die Datenbank-Konfiguration der Anwendung benötigt eine Authentifizierung.",
+  fr: "La configuration de la base de données de l'application nécessite une authentification.",
+  ja: "データベースとアプリケーション、レスポンスとリクエストとコンフィギュレーション",
+};
+
+type LoadedRule = ReturnType<typeof loadRulePack>[number];
+
+function applyAll(text: string, rules: LoadedRule[]): string {
+  return rules.reduce((acc, rule) => {
+    return typeof rule.replacement === "function"
+      ? acc.replace(rule.pattern, rule.replacement)
+      : acc.replace(rule.pattern, rule.replacement);
+  }, text);
+}
+
+for (const lang of LANGS) {
+  test(`caveman ${lang}: dedup + ultra packs load and validate`, () => {
+    // loadRulePack throws if the pack fails validateRulePack, so a non-throwing non-empty load
+    // proves both presence and schema validity.
+    const dedup = loadRulePack(lang, "dedup", { refresh: true });
+    const ultra = loadRulePack(lang, "ultra", { refresh: true });
+    assert.ok(dedup.length > 0, `${lang}/dedup should have rules`);
+    assert.ok(ultra.length > 0, `${lang}/ultra should have rules`);
+  });
+
+  test(`caveman ${lang}: ultra pack shrinks a representative sample`, () => {
+    const ultra = loadRulePack(lang, "ultra", { refresh: true });
+    const sample = ULTRA_SAMPLES[lang];
+    const out = applyAll(sample, ultra);
+    assert.ok(
+      out.length < sample.length,
+      `${lang} ultra should shrink the sample (${sample.length} -> ${out.length})`
+    );
+  });
+}
+
+test("de/fr/ja expose dedup + ultra categories via loadAllRulesForLanguage", () => {
+  for (const lang of LANGS) {
+    const cats = new Set(loadAllRulesForLanguage(lang, { refresh: true }).map((r) => r.category));
+    assert.ok(cats.has("dedup"), `${lang} should expose the dedup category`);
+    assert.ok(cats.has("ultra"), `${lang} should expose the ultra category`);
+  }
+});