diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7315a1945b..d132b6ab81 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### ✨ New Features
 
-- **feat(api-keys):** add rename support in the permissions modal — editable key name field with validation
+- **feat:** ongoing development
 
 ---
 
@@ -13,6 +13,7 @@
 ### ✨ New Features
 
 - **feat(tunnels):** integrate native ngrok tunnel support with dashboard UI parity (#1753)
+- **feat(api-keys):** add rename support in the permissions modal — editable key name field with validation (#1796)
 
 ### 🐛 Bug Fixes
 
@@ -21,6 +22,8 @@
 - **fix(chatgpt-web):** restore validator + expand model catalog to ChatGPT Plus tier (#1792)
 - **fix(codex):** stabilize Copilot responses replay state (#1791)
 - **fix(antigravity):** cap Claude bridge output tokens (#1785)
+- **fix(schema):** strip `default` properties from tool-call JSON schemas during egress to prevent injection errors (#1782)
+- **fix(db):** add `quota_snapshots` table to core DB schema initialization to prevent startup failures on fresh installs
 - **fix(models):** apply blocked providers filter to non-chat catalog models (image, embedding, audio, etc.) (#1752)
 - **fix(antigravity):** stabilize streaming payload parsing and deduplicate usage/model metadata refreshes (#1748)
 - **fix(antigravity):** normalize Gemini bridge payloads — sanitize tool names, cap output tokens, and fix thinking budget (#1769)
diff --git a/open-sse/translator/helpers/schemaCoercion.ts b/open-sse/translator/helpers/schemaCoercion.ts
index ecce28a0a7..17030c1703 100644
--- a/open-sse/translator/helpers/schemaCoercion.ts
+++ b/open-sse/translator/helpers/schemaCoercion.ts
@@ -52,6 +52,11 @@ export function coerceSchemaNumericFields(schema: unknown): unknown {
 
   const result: JsonRecord = { ...schema };
 
+  // Fix #1782: Strip 'default' property to prevent upstream models from eagerly injecting optional fields
+  if ("default" in result) {
+    delete result.default;
+  }
+
   for (const field of NUMERIC_SCHEMA_FIELDS) {
     if (field in result) {
       result[field] = coerceNumericString(result[field]);
diff --git a/src/lib/db/core.ts b/src/lib/db/core.ts
index 4a0deee28d..bf2b55d879 100644
--- a/src/lib/db/core.ts
+++ b/src/lib/db/core.ts
@@ -345,6 +345,22 @@ const SCHEMA_SQL = `
   );
   CREATE INDEX IF NOT EXISTS idx_sc_sig ON semantic_cache(signature);
   CREATE INDEX IF NOT EXISTS idx_sc_model ON semantic_cache(model);
+
+  CREATE TABLE IF NOT EXISTS quota_snapshots (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    provider TEXT NOT NULL,
+    connection_id TEXT NOT NULL,
+    window_key TEXT NOT NULL,
+    remaining_percentage REAL,
+    is_exhausted INTEGER DEFAULT 0,
+    next_reset_at TEXT,
+    window_duration_ms INTEGER,
+    raw_data TEXT,
+    created_at TEXT NOT NULL DEFAULT (datetime('now'))
+  );
+  CREATE INDEX IF NOT EXISTS idx_quota_snapshots_provider_time ON quota_snapshots(provider, created_at);
+  CREATE INDEX IF NOT EXISTS idx_quota_snapshots_connection_time ON quota_snapshots(connection_id, created_at);
+  CREATE INDEX IF NOT EXISTS idx_quota_snapshots_created_at ON quota_snapshots(created_at);
 `;
 
 // ──────────────── Column Mapping ────────────────