Card: FineEnvs citation, install line for openenv[harbor]

README.md

@@ -61,6 +61,15 @@ registry.json       # the suite manifest
 manifest.parquet    # one row per task, for filtering without walking the tree
 ```
 
+## Install
+
+```bash
+pip install "openenv[harbor]"   # tested with openenv 0.6.0, needs Python 3.12+
+```
+
+The `[harbor]` extra is what brings in the sandboxes. A plain `pip install openenv` gives you
+the CLI but nothing to run a task in. `--sandbox e2b` also needs `E2B_API_KEY` set.
+
 ## Serve it
 
 ```bash
@@ -104,3 +113,14 @@ when you change the grader's model, because there isn't one.
 | [`SmolDataEnvs-harbor-train`](https://huggingface.co/datasets/FineEnvs/SmolDataEnvs-harbor-train) | 5,000 tasks as Harbor environments |
 | [`SmolDataEnvs-harbor-test`](https://huggingface.co/datasets/FineEnvs/SmolDataEnvs-harbor-test) | 250 held-out, deliberately harder |
 | [`SmolDataEnvs-harbor-eval`](https://huggingface.co/datasets/FineEnvs/SmolDataEnvs-harbor-eval) | 144 for quick validation during a run |
+
+## Citation
+
+```bibtex
+@misc{fineenvs,
+  author = {Kolavi, Adithya S},
+  title  = {FineEnvs: Open Source RL Environments for LLM Agents},
+  year   = {2026},
+  url    = {https://github.com/adithya-s-k/FineEnvs}
+}
+```