fix: write duplicate ignore targets only once

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.
 
+## [0.1.6] - 2026-09-08
+
+### Fixed
+
+- Write and report each ignore file only once when `--targets` contains duplicates.
+
 ## [0.1.5] - 2026-09-07
 
 ### Fixed

README.md

@@ -63,6 +63,8 @@ npx ctxtrim --fail-on-waste 40    # CI: exit 1 if 40%+ of context is junk
 
 **Ignore files it writes** (all real formats the tools honor): `.cursorignore` (Cursor), `.aiexclude` (Gemini Code Assist / Firebase Studio), `.aiignore` (generic). Writes are **idempotent** — a managed block between markers, so your own rules are preserved and re-runs just update the block.
 
+Repeated names in `--targets` are ignored; each ignore file is written and reported once, in the order first requested.
+
 ## What it is (and isn't)
 
 - A **fast, deterministic, zero-dependency** heuristic — no model calls, nothing uploaded.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ctxtrim",
-  "version": "0.1.5",
+  "version": "0.1.6",
   "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": {

src/ignore.js

@@ -37,7 +37,7 @@ export function merge(existing, patterns) {
 /** @returns {{file, action:'created'|'updated', patterns:number}[]} */
 export function writeIgnores(root, patterns, targets) {
   const results = [];
-  for (const t of targets) {
+  for (const t of new Set(targets)) {
     const fname = TARGETS[t];
     if (!fname) continue;
     const path = join(root, fname);

test/ctxtrim.test.js

@@ -210,11 +210,28 @@ test("unknown --targets values fail before writing ignore files", (t) => {
   assert.equal(existsSync(join(root, ".aiexclude")), false);
   assert.equal(existsSync(join(root, ".aiignore")), false);
 });
+test("duplicate --targets writes and reports each ignore file once", (t) => {
+  const root = mkdtempSync(join(tmpdir(), "ctxtrim-duplicate-target-"));
+  t.after(() => rmSync(root, { recursive: true, force: true }));
+  writeFileSync(join(root, "package-lock.json"), "{}\n");
+
+  const result = spawnSync(process.execPath, [
+    cli, root, "--write", "--format", "json", "--targets", "cursor, gemini,cursor,gemini",
+  ], { encoding: "utf8" });
+
+  assert.equal(result.status, 0, result.stderr);
+  assert.deepEqual(JSON.parse(result.stdout).wrote, [
+    { file: ".cursorignore", action: "created", patterns: 1 },
+    { file: ".aiexclude", action: "created", patterns: 1 },
+  ]);
+  assert.equal(existsSync(join(root, ".cursorignore")), true);
+  assert.equal(existsSync(join(root, ".aiexclude")), true);
+});
 test("textReport with top: 0 omits Top offenders header", () => {
   const scan = scanRepo(repo);
   const out = textReport(scan, { price: 3, top: 0 });
   assert.ok(
     !out.includes("Top offenders"),
     "should not show Top offenders header when top is 0",
   );
-});
+});