ncbi-sequence-fetch

1# NCBI Sequence Fetch
2 
3## Prerequisites
4 
51.  **`uv`**: Read the `uv` skill and follow its Setup instructions to ensure
6    `uv` is installed and on PATH.
72.  **User Notification**: If .licenses/ncbi_sequence_fetch_LICENSE.txt does not
8    already exist in the workspace root directory then (1) prominently notify
9    the user to check the terms at https://www.ncbi.nlm.nih.gov/ and
10    https://www.ncbi.nlm.nih.gov/home/about/policies/, then (2) create the file
11    recording the notification text and timestamp.
123.  **`.env` file**: Make sure the `.env` file exists in your home directory.
13    Create one if it does not exist.
144.  **`NCBI_API_KEY`** (optional): Raises the NCBI rate limit from 3 to 10
15    requests/second. The skill works without it, but a key is recommended if the
16    user plans many queries or encounters a 429 error. You can register for a
17    key for free at https://www.ncbi.nlm.nih.gov/account/settings/. You **MUST**
18    use the safe credentials protocol in the `credentials` skill to check for
19    and request this key if this skill looks relevant to the user's request.
20 
21## Core Rules
22 
23-   **Use the Wrapper**: ALWAYS execute the provided helper scripts to query the
24    database rather than accessing the database directly. The scripts
25    automatically enforce the required rate limit gracefully.
26-   **API Key Support**: If the user provides an `NCBI_API_KEY` in their
27    environment, the query speed limits are automatically increased
28    significantly.
29…