# TC-LeJEPA (Text-Conditioned LeJEPA)

An ablation of adding text conditioning to the predictor in [LeJEPA](https://arxiv.org/abs/2511.08544). We do **not** predict text — we condition the JEPA predictor on text and keep the original two-term objective `L = (1-λ)·L_inv + λ·SIGReg`.

## Variants
| Variant     | Conditioning                            |
|-------------|-----------------------------------------|
| `baseline`  | vanilla LeJEPA, MLP predictor           |
| `film`      | FiLM on MLP predictor, text → (γ, β)    |
| `xattn`     | Patch tokens cross-attend to text       |
| `wrong_text`| `xattn` with permuted label-text map    |

Backbone: ViT-Small/16 at 128×128. Text tower: OpenCLIP ViT-B/32 (frozen). Dataset: CIFAR-100.

## Reading order
1. `comparison.md` — results, figures, and answers to the four research questions.
2. `tclejepa_src/modules.py` — `TCLeJEPAModel`, predictor variants, `SIGReg`.
3. `tclejepa_src/train.py` — training loop (same loss for every variant).
4. `tclejepa_src/evaluate.py` — linear probe, SIGReg↔acc correlation, t-SNE steering.

## Artifacts
Checkpoints, figures, logs, and `comparison.{md,json}` live at
**https://huggingface.co/adipanda/lejepa**.

## Running
```bash
set -a && source .env && set +a          # loads WANDB_API_KEY and HF_TOKEN
uv sync
EPOCHS=30 BS=512 WORKERS=12 ./run_all.sh  # runs all 4 variants sequentially
uv run python -m tclejepa_src.evaluate    # produces comparison.{json,md} + figures
```