Install, 2026-10-30 08:50:57-08:51:00 (UTC+8). Vendor script downloaded and read first:
curl -fsSL https://raw.githubusercontent.com/google-gemini/gemini-api-cli/main/scripts/install.sh -o install.sh
Observation: install.sh (230 lines) fetches releases/latest and the tar.gz; it does NOT verify checksums.txt (no sha256 step). We verified it ourselves below.

$ env -i PATH=/usr/bin:/bin HOME=$PWD/home GEMINI_INSTALL_DIR=$PWD/bin bash install.sh
[INFO] Installing gemini-api CLI...
[INFO] Detected OS: Linux
[INFO] Detected Architecture: x86_64
[INFO] Installation directory: runs/2026-10-30/tools/gemini-api-cli/bin
[INFO] Latest version: v0.4.4
[INFO] Downloading from: https://github.com/google-gemini/gemini-api-cli/releases/download/v0.4.4/gemini-api_Linux_x86_64.tar.gz
[INFO] Download complete
[INFO] Extracting archive...
[INFO] Installing to runs/2026-10-30/tools/gemini-api-cli/bin/gemini-api...
[INFO] gemini-api v0.4.4 has been installed to runs/2026-10-30/tools/gemini-api-cli/bin/gemini-api
[WARN] Installation complete, but gemini-api is not in your PATH.
[WARN] Add runs/2026-10-30/tools/gemini-api-cli/bin to your PATH by adding this to your ~/.bashrc or ~/.zshrc:
[WARN]   export PATH="$PATH:runs/2026-10-30/tools/gemini-api-cli/bin"
[WARN] 
[WARN] Then run: source ~/.bashrc  # or source ~/.zshrc

real	0m1.839s
user	0m0.155s
sys	0m0.098s

checksums.txt line: 976c0c7241c0d577f535249cf670c8e43503d34fbacd04fd0b008d98c34b6078  gemini-api_Linux_x86_64.tar.gz
our sha256 of downloaded archive: 976c0c7241c0d577f535249cf670c8e43503d34fbacd04fd0b008d98c34b6078  -> match
binary sha256: b0e2d1acc6175c592b70ca85094b77eeef1dc575319440cb83cd3542ce14a5ff (17,313,954 bytes, single static Go binary)

$ gemini-api version
gemini-api 0.4.4
Built: 2026-10-23T16:49:21Z