diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..6f32f79
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,57 @@
+# AGENTS.md — Ollama-Updater
+
+Single-file Bash script (`ollama-update`) that updates Ollama to latest stable or beta.
+
+## Commands
+
+```bash
+# Run script (stable channel)
+./ollama-update
+
+# Run script (beta channel)
+./ollama-update --beta
+./ollama-update -b
+
+# Show help
+./ollama-update --help
+```
+
+## Lint / Check
+
+```bash
+# ShellCheck (recommended)
+shellcheck ollama-update
+
+# Run with bash strict mode (what the script uses)
+bash -euo pipefail ollama-update --help
+```
+
+## Structure
+
+- `ollama-update` — main script (executable, bash, ~240 lines)
+- `README.md` — usage docs
+
+## Key behaviors
+
+- Uses GitHub API (`api.github.com/repos/ollama/ollama/releases`) to fetch versions
+- Downloads and runs official `ollama.com/install.sh` via `OLLAMA_VERSION` env var for version pinning
+- SemVer comparison with suffix support (`cmp_versions` function)
+- Requires: `curl`, `grep`, `sed`, `sort`, `mktemp`, `chmod`
+- Runs without root for version checks; install may need root (systemd service)
+
+## Testing
+
+No formal test suite. Manual verification:
+
+```bash
+# Dry-run version checks (no install)
+./ollama-update          # shows local/stable/beta versions
+./ollama-update --beta   # shows beta comparison
+```
+
+## Gotchas
+
+- Script uses `set -euo pipefail` and `nullglob` — preserve these
+- GitHub API rate limits: unauthenticated = 60 req/hr
+- Beta channel compares against stable; only updates if beta > stable AND beta > local
+- Temp install script cleaned via `trap` on EXIT
\ No newline at end of file
diff --git a/ollama-update b/ollama-update
index b92967b..3b7ef26 100755
--- a/ollama-update
+++ b/ollama-update
@@ -157,6 +157,12 @@ install_ollama() {
     # Skript ausführbar machen und ausführen.
     chmod +x "$tmp_script" || die "Konnte Installations-Skript nicht ausführbar machen."
     "$tmp_script" || die "Installation von Ollama ist fehlgeschlagen."
+
+    # Erfolg: temporäre Datei löschen und Trap entfernen, damit er beim
+    # späteren Script-Exit nicht auf eine nicht mehr existierende lokale
+    # Variable zugreift (sonst Fehler wegen 'set -u').
+    trap - EXIT
+    rm -f "$tmp_script"
 }
 
 main() {