diff --git a/README.md b/README.md
index 5ab0e58a3..89e75a02e 100644
--- a/README.md
+++ b/README.md
@@ -298,7 +298,7 @@ Also check out the sister project, [awesome-dynamic-analysis](https://github.com
 
 - [Gendarme](https://www.mono-project.com/docs/tools+libraries/tools/gendarme) — Gendarme inspects programs and libraries that contain code in ECMA CIL format (Mono and .NET).
 
-- [Infer#](https://github.com/microsoft/infersharp) :warning: — InferSharp (also referred to as Infer#) is an interprocedural and  scalable static code analyzer for C#. Via the capabilities of Facebook's Infer,  this tool detects null pointer dereferences and resource leaks.
+- [Infer#](https://github.com/microsoft/infersharp) — InferSharp (also referred to as Infer#) is an interprocedural and  scalable static code analyzer for C#. Via the capabilities of Facebook's Infer,  this tool detects null pointer dereferences and resource leaks.
 
 - [Meziantou.Analyzer](https://github.com/meziantou/Meziantou.Analyzer) — A Roslyn analyzer to enforce some good practices in C# in terms of design, usage, security, performance, and style.
 
@@ -1698,7 +1698,7 @@ Loading address: binbloom can parse a raw binary firmware and determine its load
 
 - [Ghidra](https://ghidra-sre.org) — A software reverse engineering (SRE) suite of tools developed by NSA's Research Directorate in support of the Cybersecurity mission
 
-- [Hopper](https://www.hopperapp.com/) :copyright: — macOS and Linux reverse engineering tool that lets you disassemble, decompile and debug applications. Hopper displays the code using different representations, e.g. the Control Flow Graph, and the pseudo-code of a procedure. Supports Apple Silicon.
+- [Hopper](https://www.hopperapp.com/) :warning: :copyright: — macOS and Linux reverse engineering tool that lets you disassemble, decompile and debug applications. Hopper displays the code using different representations, e.g. the Control Flow Graph, and the pseudo-code of a procedure. Supports Apple Silicon.
 
 - [IDA Free](https://www.hex-rays.com/products/ida/support/download_freeware) :copyright: — Binary code analysis tool.
 
diff --git a/data/render/src/bin/main.rs b/data/render/src/bin/main.rs
index 31838f30b..8c20ad51b 100644
--- a/data/render/src/bin/main.rs
+++ b/data/render/src/bin/main.rs
@@ -3,6 +3,7 @@ use askama::Template;
 use pico_args::Arguments;
 use render::types::{Entry, ParsedEntry, Tag, Tags, Type};
 use render::{check_deprecated, create_api, create_catalog};
+use slug::slugify;
 use std::collections::BTreeMap;
 use std::env;
 use std::ffi::OsStr;
@@ -49,6 +50,24 @@ fn read_tools(path: PathBuf) -> Result<Vec<ParsedEntry>> {
         .collect::<Result<Vec<ParsedEntry>, _>>()
 }
 
+/// Backfills the deprecated field in the tools data from the old tools data.
+fn backfill_deprecated(tools: &mut Vec<Entry>) -> Result<()> {
+    let tools_raw = match fs::read_to_string("data/api/tools.json") {
+        Ok(content) => content,
+        Err(_) => return Ok(()), // No old data to backfill from. Skip silently.
+    };
+
+    let old_tools_data: BTreeMap<String, serde_json::Value> = serde_json::from_str(&tools_raw)?;
+
+    for tool in tools {
+        let id = slugify(&tool.name);
+        if let Some(old_tool) = old_tools_data.get(&id) {
+            tool.deprecated = old_tool.get("deprecated").and_then(|d| d.as_bool());
+        }
+    }
+    Ok(())
+}
+
 fn main() -> Result<()> {
     let mut args = Arguments::from_env();
     let args = Args {
@@ -69,10 +88,16 @@ fn main() -> Result<()> {
     let mut tools = tools?;
     tools.sort();
 
-    if !args.skip_deprecated {
-        if let Ok(token) = env::var("GITHUB_TOKEN") {
-            check_deprecated(token, &mut tools)?;
+    let should_check_deprecation = !args.skip_deprecated;
+    let github_token = env::var("GITHUB_TOKEN");
+
+    match (should_check_deprecation, github_token) {
+        (true, Ok(token)) => check_deprecated(token, &mut tools)?,
+        (true, Err(_)) => {
+            eprintln!("No GITHUB_TOKEN environment variable found. Reusing old deprecation data.");
+            backfill_deprecated(&mut tools)?;
         }
+        (false, _) => backfill_deprecated(&mut tools)?,
     }
 
     let languages: Vec<Tag> = tags
diff --git a/data/render/src/types.rs b/data/render/src/types.rs
index 312fe4510..82e58faf4 100644
--- a/data/render/src/types.rs
+++ b/data/render/src/types.rs
@@ -61,6 +61,8 @@ pub enum Category {
     Linter,
     #[serde(rename = "formatter")]
     Formatter,
+    #[serde(rename = "performance")]
+    Performance,
     #[serde(rename = "meta")]
     Meta,
 }