diff --git a/CHANGELOG.md b/CHANGELOG.md
index 595788d..c2c5d80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 All notable changes to this project are documented here, following
 [Keep a Changelog](https://keepachangelog.com/) and semantic versioning.
 
+## [0.1.12] - 2026-09-16
+
+### Fixed
+
+- Classify common Python, Bun, Deno, and Pixi lockfiles as trimmable lockfiles.
+
 ## [0.1.11] - 2026-09-16
 
 ### Fixed
diff --git a/package-lock.json b/package-lock.json
index b469704..71e5608 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ctxtrim",
-  "version": "0.1.11",
+  "version": "0.1.12",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ctxtrim",
-      "version": "0.1.11",
+      "version": "0.1.12",
       "license": "MIT",
       "bin": {
         "ctxtrim": "bin/ctxtrim.js"
diff --git a/package.json b/package.json
index 8ce0d65..95b3207 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ctxtrim",
-  "version": "0.1.11",
+  "version": "0.1.12",
   "description": "Trim what bloats your AI coding context. Scan a repo, find the high-cost/low-value files ballooning your Claude Code / Cursor / Codex context, and write ignore files to cut token cost. Zero dependencies.",
   "type": "module",
   "bin": {
diff --git a/src/classify.js b/src/classify.js
index 73d531a..8a1bc2b 100644
--- a/src/classify.js
+++ b/src/classify.js
@@ -17,6 +17,7 @@ const LOCKFILES = new Set([
   "package-lock.json", "yarn.lock", "pnpm-lock.yaml", "npm-shrinkwrap.json",
   "cargo.lock", "poetry.lock", "gemfile.lock", "composer.lock", "go.sum",
   "pubspec.lock", "podfile.lock", "packages.lock.json", "flake.lock", "uv.lock",
+  "pipfile.lock", "bun.lockb", "bun.lock", "deno.lock", "pixi.lock",
 ]);
 
 const DATA_EXT = new Set([
diff --git a/test/ctxtrim.test.js b/test/ctxtrim.test.js
index 7a67e48..0ccd82c 100644
--- a/test/ctxtrim.test.js
+++ b/test/ctxtrim.test.js
@@ -21,6 +21,10 @@ test("token estimate is ~chars/4", () => {
 
 test("classify buckets files correctly", () => {
   assert.equal(classify("package-lock.json", {}).category, "lockfile");
+  for (const name of ["Pipfile.lock", "bun.lockb", "bun.lock", "deno.lock", "pixi.lock"]) {
+    assert.equal(classify(name, {}).category, "lockfile");
+    assert.equal(classify(name, {}).trim, true);
+  }
   assert.equal(classify("node_modules/x/index.js", {}).category, "vendored");
   assert.equal(classify("dist/app.js", {}).category, "build");
   assert.equal(classify("app.min.js", {}).category, "minified");