diff --git a/src/lib/api.ts b/src/lib/api.ts
index f9cf4bd..18ec991 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -1,6 +1,6 @@
 import type { AstroCookies } from "astro";
 import { isOwner } from "./auth";
-import { BLOG_URL, PDS_URL, DID } from "./constants";
+import { BLOG_URL, PDS_URL, DID, SESSION_DID_COOKIE } from "./constants";
 
 export function checkOrigin(request: Request): Response | null {
   const origin = request.headers.get("origin");
@@ -11,7 +11,7 @@ export function checkOrigin(request: Request): Response | null {
 }
 
 export function checkAuth(cookies: AstroCookies): Response | null {
-  const sessionDid = cookies.get("session_did")?.value;
+  const sessionDid = cookies.get(SESSION_DID_COOKIE)?.value;
   if (!sessionDid || !isOwner(sessionDid)) {
     return new Response(JSON.stringify({ error: "Not authorized" }), { status: 403 });
   }
diff --git a/src/lib/constants.ts b/src/lib/constants.ts
index df087df..81761e7 100644
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -12,6 +12,16 @@ export const MAX_CONTENT_LENGTH = 100_000;
 export const MAX_ABOUT_LENGTH = 5_000;
 export const MAX_IMAGE_SIZE = 5 * 1024 * 1024; // 5 MB
 
+// Session
+export const SESSION_DID_COOKIE = "session_did";
+export const SESSION_HANDLE_COOKIE = "session_handle";
+export const SESSION_MAX_AGE = 86400 * 7; // 7 days
+
+// RSS
+export const RSS_MAX_ITEMS = 20;
+export const RSS_EXCERPT_LENGTH = 300;
+export const DEFAULT_EXCERPT_LENGTH = 160;
+
 // Cache TTLs (milliseconds)
 export const PROFILE_TTL = 3600_000; // 1 hour
 export const ENTRIES_TTL = 300_000; // 5 minutes
diff --git a/src/lib/pds.ts b/src/lib/pds.ts
index fb3b232..a6e4f15 100644
--- a/src/lib/pds.ts
+++ b/src/lib/pds.ts
@@ -25,7 +25,7 @@ export interface BlogEntry {
   blobs?: AtBlob[];
 }
 
-export interface AuthorProfile {
+interface AuthorProfile {
   displayName: string;
   description: string;
   avatarUrl: string | null;
@@ -249,7 +249,8 @@ export async function getBlogEntry(rkey: string): Promise<BlogEntry | null> {
 
     entryCache.set(rkey, { data: entry, expiresAt: Date.now() + ENTRY_TTL });
     return entry;
-  } catch {
+  } catch (err) {
+    console.error("Failed to fetch blog entry:", err);
     return staleData ?? null; // Network error — serve stale if available
   }
 }
@@ -295,7 +296,8 @@ export async function getRawBlogEntry(
       theme: val.theme as string | undefined,
       blobs: parseBlobsFromValue(val),
     };
-  } catch {
+  } catch (err) {
+    console.error("Failed to fetch raw blog entry:", err);
     return null;
   }
 }
@@ -330,7 +332,8 @@ export async function getAbout(): Promise<string> {
 
     aboutCache = { data: content, expiresAt: Date.now() + ABOUT_TTL };
     return content;
-  } catch {
+  } catch (err) {
+    console.error("Failed to fetch about:", err);
     return staleAbout?.data ?? DEFAULT_ABOUT;
   }
 }
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index cdc3a86..57229df 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -8,7 +8,9 @@ export function formatDate(iso: string, opts?: { weekday?: boolean }): string {
   return new Date(iso).toLocaleDateString("en-US", options);
 }
 
-export function excerpt(content: string, maxLen = 160): string {
+import { DEFAULT_EXCERPT_LENGTH } from "./constants";
+
+export function excerpt(content: string, maxLen = DEFAULT_EXCERPT_LENGTH): string {
   const plain = content
     .replace(/^#{1,6}\s+/gm, "")
     .replace(/\*{1,2}([^*]+)\*{1,2}/g, "$1")
diff --git a/src/pages/[rkey].astro b/src/pages/[rkey].astro
index c0a8e51..64075ab 100644
--- a/src/pages/[rkey].astro
+++ b/src/pages/[rkey].astro
@@ -1,7 +1,7 @@
 ---
 import Base from "../layouts/Base.astro";
 import { getBlogEntry, getRawBlogEntry, isValidRkey } from "../lib/pds";
-import { HANDLE, PDS_URL, DID, BLOG_COLLECTION } from "../lib/constants";
+import { HANDLE, PDS_URL, DID, BLOG_COLLECTION, SESSION_DID_COOKIE } from "../lib/constants";
 import { formatDate } from "../lib/utils";
 import { isOwner } from "../lib/auth";
 import { marked } from "marked";
@@ -21,7 +21,7 @@ if (!rkey || !isValidRkey(rkey)) {
 }
 
 // Auth check before fetching — owner can see drafts
-const sessionDid = Astro.cookies.get("session_did")?.value;
+const sessionDid = Astro.cookies.get(SESSION_DID_COOKIE)?.value;
 const isAuthor = sessionDid ? isOwner(sessionDid) : false;
 
 const entry = isAuthor
diff --git a/src/pages/api/logout.ts b/src/pages/api/logout.ts
index db09be5..ef3fbf1 100644
--- a/src/pages/api/logout.ts
+++ b/src/pages/api/logout.ts
@@ -1,7 +1,8 @@
 import type { APIRoute } from "astro";
+import { SESSION_DID_COOKIE, SESSION_HANDLE_COOKIE } from "../../lib/constants";
 
 export const GET: APIRoute = async ({ cookies, redirect }) => {
-  cookies.delete("session_did", { path: "/" });
-  cookies.delete("session_handle", { path: "/" });
+  cookies.delete(SESSION_DID_COOKIE, { path: "/" });
+  cookies.delete(SESSION_HANDLE_COOKIE, { path: "/" });
   return redirect("/", 303);
 };
diff --git a/src/pages/index.astro b/src/pages/index.astro
index 29a1366..8785143 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -1,7 +1,7 @@
 ---
 import Base from "../layouts/Base.astro";
 import { getBlogEntries, getProfile, getAbout } from "../lib/pds";
-import { HANDLE } from "../lib/constants";
+import { HANDLE, SESSION_DID_COOKIE } from "../lib/constants";
 import { isOwner } from "../lib/auth";
 import { formatDate, excerpt } from "../lib/utils";
 import { marked } from "marked";
@@ -15,7 +15,7 @@ const aboutHtml = DOMPurify.sanitize(await marked.parse(aboutRaw), {
   ADD_ATTR: ["target"],
 });
 
-const sessionDid = Astro.cookies.get("session_did")?.value;
+const sessionDid = Astro.cookies.get(SESSION_DID_COOKIE)?.value;
 const isAuthor = sessionDid ? isOwner(sessionDid) : false;
 ---
 
diff --git a/src/pages/rss.xml.ts b/src/pages/rss.xml.ts
index c66fbcd..595e835 100644
--- a/src/pages/rss.xml.ts
+++ b/src/pages/rss.xml.ts
@@ -1,17 +1,23 @@
 import type { APIRoute } from "astro";
 import { getBlogEntries, getProfile } from "../lib/pds";
-import { BLOG_URL, HANDLE } from "../lib/constants";
+import { BLOG_URL, HANDLE, RSS_MAX_ITEMS, RSS_EXCERPT_LENGTH } from "../lib/constants";
 import { escapeXml, excerpt } from "../lib/utils";
 
 export const GET: APIRoute = async () => {
-  const [entries, profile] = await Promise.all([
-    getBlogEntries(),
-    getProfile(),
-  ]);
+  let entries, profile;
+  try {
+    [entries, profile] = await Promise.all([
+      getBlogEntries(),
+      getProfile(),
+    ]);
+  } catch (err) {
+    console.error("RSS feed fetch failed:", err);
+    return new Response("RSS feed temporarily unavailable", { status: 503 });
+  }
 
-  const items = entries.slice(0, 20).map((entry) => {
+  const items = entries.slice(0, RSS_MAX_ITEMS).map((entry) => {
     const pubDate = new Date(entry.createdAt).toUTCString();
-    const desc = excerpt(entry.content, 300);
+    const desc = excerpt(entry.content, RSS_EXCERPT_LENGTH);
 
     return `    <item>
       <title>${escapeXml(entry.title)}</title>
diff --git a/src/pages/write.astro b/src/pages/write.astro
index 2649587..a97ab83 100644
--- a/src/pages/write.astro
+++ b/src/pages/write.astro
@@ -3,6 +3,7 @@ import Base from "../layouts/Base.astro";
 import { verifyProxyTicket, isOwner, getLoginUrl } from "../lib/auth";
 import { getDraftEntries, getRawBlogEntry, type BlogEntry } from "../lib/pds";
 import { formatDate } from "../lib/utils";
+import { SESSION_DID_COOKIE, SESSION_HANDLE_COOKIE, SESSION_MAX_AGE } from "../lib/constants";
 
 let authed = false;
 let handle = "";
@@ -12,27 +13,27 @@ const ticket = Astro.url.searchParams.get("_atauth_ticket");
 if (ticket) {
   const user = await verifyProxyTicket(ticket);
   if (user && isOwner(user.did)) {
-    Astro.cookies.set("session_did", user.did, {
+    Astro.cookies.set(SESSION_DID_COOKIE, user.did, {
       httpOnly: true,
       secure: true,
       sameSite: "lax",
       path: "/",
-      maxAge: 86400 * 7,
+      maxAge: SESSION_MAX_AGE,
     });
-    Astro.cookies.set("session_handle", user.handle, {
+    Astro.cookies.set(SESSION_HANDLE_COOKIE, user.handle, {
       httpOnly: true,
       secure: true,
       sameSite: "lax",
       path: "/",
-      maxAge: 86400 * 7,
+      maxAge: SESSION_MAX_AGE,
     });
     return Astro.redirect("/write");
   }
 }
 
 // Check existing session cookie
-const sessionDid = Astro.cookies.get("session_did")?.value;
-const sessionHandle = Astro.cookies.get("session_handle")?.value;
+const sessionDid = Astro.cookies.get(SESSION_DID_COOKIE)?.value;
+const sessionHandle = Astro.cookies.get(SESSION_HANDLE_COOKIE)?.value;
 if (sessionDid && sessionHandle && isOwner(sessionDid)) {
   authed = true;
   handle = sessionHandle;