diff --git a/www/document.html b/www/document.html
index 3f20b72..db2e3e0 100644
--- a/www/document.html
+++ b/www/document.html
@@ -911,6 +911,8 @@
     const DOC_CHAT_D_PREFIX = 'doc-chat:';
     const AVAILABLE_TOOLS = [];
     const DEFAULT_SKILL_TEMPLATE = 'system:\nYou are a helpful assistant.\n\nuser:\n{{message}}';
+    const DEFAULT_DOCUMENT_SKILL_SLUG = 'default-document-skill';
+    const DEFAULT_DOCUMENT_SKILL_DESCRIPTION = 'Default skill for document chat/edit JSON contract.';
     const NOTE_KINDS = [30023, 30024];
     const DOCUMENT_EDITOR_WRAPPER_SYSTEM = `You are collaborating with the user on a single markdown document.
 Return ONLY valid JSON with fields: {"chat": string, "document": string|null}.
@@ -918,6 +920,16 @@ Return ONLY valid JSON with fields: {"chat": string, "document": string|null}.
 - document: full updated markdown document when making edits.
 - If no edit is needed, set document to null.
 Never include extra keys or text outside JSON.`;
+    const DEFAULT_DOCUMENT_SKILL_TEMPLATE = `system:
+${DOCUMENT_EDITOR_WRAPPER_SYSTEM}
+
+Current document:
+<document>
+{{document}}
+</document>
+
+user:
+{{message}}`;
 
     let updateIntervalId = null;
     let currentPubkey = null;
@@ -1260,6 +1272,7 @@ Never include extra keys or text outside JSON.`;
           title,
           modelId: '',
           skillKeys: [],
+          removedSkillKeys: [],
           messages: [],
           createdAt: nowTs(),
           updatedAt: nowTs()
@@ -1586,13 +1599,22 @@ Never include extra keys or text outside JSON.`;
       };
     }
 
-    function parseSkillTemplate(template, userInput) {
+    function parseSkillTemplate(template, userInput, context = {}) {
       const parts = splitSkillTemplate(template);
-      const system = String(parts.system || '').trim();
+      const rawSystem = String(parts.system || '').trim();
       const userTemplate = String(parts.userTemplate || '').trim();
+      const messageText = String(userInput || '').trim();
+      const documentText = String(context?.document || '').trim();
+      const system = rawSystem
+        .replaceAll('{{message}}', messageText)
+        .replaceAll('{{document}}', documentText)
+        .trim();
       const user = userTemplate
-        ? userTemplate.replaceAll('{{message}}', String(userInput || '').trim()).trim()
-        : String(userInput || '').trim();
+        ? userTemplate
+          .replaceAll('{{message}}', messageText)
+          .replaceAll('{{document}}', documentText)
+          .trim()
+        : messageText;
       return { system, user, userTemplate };
     }
 
@@ -1759,27 +1781,80 @@ Never include extra keys or text outside JSON.`;
       };
     }
 
+    function getDefaultDocumentSkillKey() {
+      if (!currentPubkey) return '';
+      return skillKey(currentPubkey, DEFAULT_DOCUMENT_SKILL_SLUG);
+    }
+
+    function isDefaultDocumentSkillKey(key) {
+      return String(key || '').trim() === getDefaultDocumentSkillKey();
+    }
+
     function getConversationSkillKeys(convo) {
       return Array.isArray(convo?.skillKeys)
         ? convo.skillKeys.map((x) => String(x || '').trim()).filter(Boolean)
         : [];
     }
 
+    function getConversationRemovedSkillKeys(convo) {
+      return Array.isArray(convo?.removedSkillKeys)
+        ? convo.removedSkillKeys.map((x) => String(x || '').trim()).filter(Boolean)
+        : [];
+    }
+
+    function enforceDefaultSkillSelection() {
+      const convo = getCurrentConversation();
+      if (!convo) return;
+      const defaultKey = getDefaultDocumentSkillKey();
+      if (!defaultKey) return;
+      const hasDefaultSkill = skills.some((s) => s.key === defaultKey);
+      if (!hasDefaultSkill) return;
+
+      const removed = new Set(getConversationRemovedSkillKeys(convo));
+      const selected = new Set(getConversationSkillKeys(convo));
+      if (!removed.has(defaultKey) && !selected.has(defaultKey)) {
+        selected.add(defaultKey);
+        convo.skillKeys = Array.from(selected);
+        selectedSkillKeys = [...convo.skillKeys];
+        updateConversation({ skillKeys: [...convo.skillKeys] });
+        renderSkillsList();
+        renderSkillsEditor();
+      }
+    }
+
     function syncSelectedSkillsFromConversation(convo) {
       const target = getConversationSkillKeys(convo);
       const curr = selectedSkillKeys.join('|');
       const next = target.join('|');
-      if (curr === next) return;
-      selectedSkillKeys = target;
-      renderSkillsList();
-      renderSkillsEditor();
+      if (curr !== next) {
+        selectedSkillKeys = target;
+        renderSkillsList();
+        renderSkillsEditor();
+      }
+      enforceDefaultSkillSelection();
     }
 
     function persistSelectedSkillsToConversation() {
       const convo = getCurrentConversation();
       if (!convo) return;
       convo.skillKeys = [...selectedSkillKeys];
-      updateConversation({ skillKeys: [...selectedSkillKeys] });
+      convo.removedSkillKeys = getConversationRemovedSkillKeys(convo);
+      updateConversation({
+        skillKeys: [...selectedSkillKeys],
+        removedSkillKeys: [...convo.removedSkillKeys]
+      });
+    }
+
+    function setDefaultSkillExplicitlyRemoved(removed) {
+      const convo = getCurrentConversation();
+      if (!convo) return;
+      const defaultKey = getDefaultDocumentSkillKey();
+      if (!defaultKey) return;
+      const set = new Set(getConversationRemovedSkillKeys(convo));
+      if (removed) set.add(defaultKey);
+      else set.delete(defaultKey);
+      convo.removedSkillKeys = Array.from(set);
+      updateConversation({ removedSkillKeys: [...convo.removedSkillKeys] });
     }
 
     function toggleSkillSelection(key, enabled) {
@@ -1791,6 +1866,9 @@ Never include extra keys or text outside JSON.`;
       } else if (!enabled && exists) {
         selectedSkillKeys = selectedSkillKeys.filter((k) => k !== skillKeyRaw);
       }
+      if (isDefaultDocumentSkillKey(skillKeyRaw)) {
+        setDefaultSkillExplicitlyRemoved(!enabled);
+      }
       persistSelectedSkillsToConversation();
       renderSkillsList();
       renderSkillsEditor();
@@ -2113,6 +2191,7 @@ Never include extra keys or text outside JSON.`;
       }
       renderSkillsList();
       renderSkillsEditor();
+      enforceDefaultSkillSelection();
     }
 
     function clearSkillSubscription() {
@@ -2185,7 +2264,9 @@ Never include extra keys or text outside JSON.`;
 
       for (const skill of selected) {
         const edit = getSkillEditorValue(skill);
-        const parsed = parseSkillTemplate(edit.template, userInput);
+        const parsed = parseSkillTemplate(edit.template, userInput, {
+          document: String(taDocument?.value || '')
+        });
         if (parsed.system) systemParts.push(parsed.system);
         if (parsed.userTemplate) {
           resolvedUser = parsed.user;
@@ -2223,6 +2304,7 @@ Never include extra keys or text outside JSON.`;
         model_id: String(convo?.modelId || ''),
         provider_name: String(aiConfig?.provider || ''),
         skill_keys: Array.isArray(convo?.skillKeys) ? convo.skillKeys : [],
+        removed_skill_keys: getConversationRemovedSkillKeys(convo),
         messages: deleted ? [] : safeMessages,
         deleted: Boolean(deleted)
       };
@@ -2327,6 +2409,9 @@ Never include extra keys or text outside JSON.`;
             skillKeys: Array.isArray(parsed?.skill_keys)
               ? parsed.skill_keys.map((x) => String(x || '').trim()).filter(Boolean)
               : [],
+            removedSkillKeys: Array.isArray(parsed?.removed_skill_keys)
+              ? parsed.removed_skill_keys.map((x) => String(x || '').trim()).filter(Boolean)
+              : [],
             messages,
             createdAt: Number(Date.parse(d) || nowTs()),
             updatedAt: Number(parsed?.updated_at_ms || nowTs())
@@ -3241,7 +3326,10 @@ Never include extra keys or text outside JSON.`;
       try {
         const apiPayload = conversationToApiMessages(convo, { currentPrompt: prompt });
         const wrapperSystem = buildDocumentSystemPrompt(prompt);
-        const allMessages = [{ role: 'system', content: wrapperSystem }, ...apiPayload.messages];
+        const hasDefaultSkillSelected = getSelectedSkills().some((s) => normalizeSlug(s.slug) === DEFAULT_DOCUMENT_SKILL_SLUG);
+        const allMessages = hasDefaultSkillSelected
+          ? [...apiPayload.messages]
+          : [{ role: 'system', content: wrapperSystem }, ...apiPayload.messages];
 
         let rawContent = '';
         let responseJson = null;
@@ -3465,6 +3553,7 @@ Never include extra keys or text outside JSON.`;
       if (btnSkillClearAll) {
         btnSkillClearAll.addEventListener('click', () => {
           selectedSkillKeys = [];
+          setDefaultSkillExplicitlyRemoved(true);
           persistSelectedSkillsToConversation();
           renderSkillsList();
           renderSkillsEditor();
@@ -3972,6 +4061,83 @@ Never include extra keys or text outside JSON.`;
       });
     }
 
+    async function ensureDefaultDocumentSkillExists() {
+      if (!currentPubkey) return;
+      const slug = DEFAULT_DOCUMENT_SKILL_SLUG;
+      const key = getDefaultDocumentSkillKey();
+      const existingInMemory = skills.find((s) => s.key === key);
+      if (existingInMemory) {
+        enforceDefaultSkillSelection();
+        return;
+      }
+
+      const filter = {
+        kinds: [31123],
+        authors: [currentPubkey],
+        '#d': [slug],
+        limit: 1
+      };
+
+      const cached = await queryCache(filter).catch(() => []);
+      const cachedEvt = Array.isArray(cached) && cached.length > 0
+        ? [...cached].sort((a, b) => Number(b?.created_at || 0) - Number(a?.created_at || 0))[0]
+        : null;
+      if (cachedEvt) {
+        upsertSkillFromEvent(cachedEvt);
+        enforceDefaultSkillSelection();
+        return;
+      }
+
+      const relays = await ndkFetchEvents(filter).catch(() => []);
+      const relayEvt = Array.isArray(relays) && relays.length > 0
+        ? [...relays].sort((a, b) => Number(b?.created_at || 0) - Number(a?.created_at || 0))[0]
+        : null;
+      if (relayEvt) {
+        upsertSkillFromEvent(relayEvt);
+        enforceDefaultSkillSelection();
+        return;
+      }
+
+      const draftSkill = {
+        key,
+        slug,
+        description: DEFAULT_DOCUMENT_SKILL_DESCRIPTION,
+        template: DEFAULT_DOCUMENT_SKILL_TEMPLATE,
+        temperature: Number(aiConfig.temperature ?? 0),
+        max_tokens: Math.max(1, Math.floor(Number(aiConfig.max_tokens ?? 10000))),
+        llm: String(aiConfig.model || 'default').trim() || 'default',
+        seed: null,
+        requires_tools: [],
+        optional_tools: [],
+        requires_skills: [],
+        unavailable_required_tools: [],
+        needsUnavailableTools: false,
+        author: currentPubkey,
+        created_at: Math.floor(Date.now() / 1000),
+        raw: null
+      };
+
+      skillEditorValues[draftSkill.key] = {
+        slug: draftSkill.slug,
+        description: draftSkill.description,
+        llm: draftSkill.llm,
+        temperature: String(draftSkill.temperature),
+        max_tokens: String(draftSkill.max_tokens),
+        seed: '',
+        template: draftSkill.template
+      };
+
+      const skillEvent = buildSkillEventFromEditor(draftSkill);
+      await publishEvent(skillEvent);
+      upsertSkillFromEvent({
+        ...skillEvent,
+        pubkey: currentPubkey,
+        id: uid()
+      });
+      setStatus('Created default-document-skill.');
+      enforceDefaultSkillSelection();
+    }
+
     (async function main() {
       const versionInfo = await getVersion();
       console.log(`[document.html ${versionInfo.VERSION}] Loading...`);
@@ -4104,6 +4270,7 @@ Never include extra keys or text outside JSON.`;
         renderSkillsList();
         renderSkillsEditor();
         refreshSkills();
+        await ensureDefaultDocumentSkillExists();
         bindRelayActivityListeners();
         setStatus('Ready.');
         getRoutstrBalance().catch((error) => {
diff --git a/www/js/version.json b/www/js/version.json
index 955467b..cd9d397 100644
--- a/www/js/version.json
+++ b/www/js/version.json
@@ -1,5 +1,5 @@
 {
-  "VERSION": "v0.7.7",
-  "VERSION_NUMBER": "0.7.7",
-  "BUILD_DATE": "2026-04-28T14:00:02.302Z"
+  "VERSION": "v0.7.8",
+  "VERSION_NUMBER": "0.7.8",
+  "BUILD_DATE": "2026-04-28T14:39:51.733Z"
 }