VALIDATION_LOG.md

# Space Trainer Validation Log

Date (UTC): 2026-02-28 10:24:36 UTC

## Scope Reviewed

Reviewed the full `space_trainer/` implementation surface used by the Hugging Face Space runtime:

- `space_trainer/app.py`
- `space_trainer/README.md`
- `space_trainer/PRODUCTION.md`
- `space_trainer/.env.example`
- `space_trainer/requirements.txt`
- `space_trainer/configs/math_conjecture_sota.yaml`
- `space_trainer/scripts/preflight_check.py`
- `space_trainer/scripts/train_sota.py`
- `space_trainer/scripts/eval_sota.py`
- `space_trainer/tests/test_core_utils.py`
- Existing workspace runtime/run artifacts under `space_trainer/workspace/`

## Issues Found

1. UI result badge mapping treated `preflight passed` as neutral because `_` was converted to spaces before class lookup.
2. Unit tests failed when run from repository root due import path assumptions (`ModuleNotFoundError: app`).

## Fixes Applied

1. `space_trainer/app.py`
- Normalized run result strings in `_run_result_badge_class()` to handle underscore/space/hyphen variants.
- Updated recent-runs badge rendering to classify by raw result key and only prettify the display label.
- Kept Gradio theme/css/head in `launch()` (Gradio 6.6 recommended path), and set queue configuration once at module load with `demo.queue(default_concurrency_limit=1)`.

2. `space_trainer/tests/test_core_utils.py`
- Added deterministic `sys.path` insertion for `space_trainer/` root so tests pass from both:
  - repo root (`python -m unittest discover -s space_trainer/tests -v`)
  - `space_trainer/` directory (`python -m unittest discover -s tests -v`)
- Added regression test for preflight badge-class normalization.

## Validation Commands and Results

1. Preflight checks:
- Command: `.venv/bin/python space_trainer/scripts/preflight_check.py --json`
- Result: PASS (`"ok": true`)

2. Unit tests from repo root:
- Command: `.venv/bin/python -m unittest discover -s space_trainer/tests -v`
- Result: PASS (`Ran 15 tests`, `OK`)

3. Unit tests from `space_trainer/`:
- Command: `../.venv/bin/python -m unittest discover -s tests -v`
- Result: PASS (`Ran 15 tests`, `OK`)

4. Python syntax compile check:
- Command: `../.venv/bin/python -m py_compile app.py scripts/preflight_check.py scripts/train_sota.py scripts/eval_sota.py tests/test_core_utils.py`
- Result: PASS

5. Gradio app object/config smoke check:
- Command: `../.venv/bin/python - <<'PY' ... app.demo.get_config_file() ... PY`
- Result: PASS (`mode=blocks`, `components=44`, `dependencies=3`, `queue_set=True`)

## Environment Notes

- CUDA warning appears in this environment (`cudaGetDeviceCount` OS unsupported). This is expected on non-GPU hosts and handled by app CPU fallback logic.
- Fast tokenizer fallback warning (`protobuf missing`) is already handled by project fallback code and validated by tests.
- Direct local `app.py` server launch in this sandbox cannot bind any Gradio ports (`Cannot find empty port...`). This is an execution-environment limitation, not a code-level validation failure.

## Current Status

- UI telemetry classification bug fixed.
- Test reliability improved.
- Preflight + tests + compile checks are passing.
- Space runtime code path is consistent and ready for deployment validation inside Hugging Face Spaces.

---

## Rewrite Session

Date (UTC): 2026-02-28 11:56:17 UTC

### Objective

- Reprogram `app.py` from scratch.
- Switch UI to a full monochrome theme.
- Preserve full end-to-end pipeline functionality in a newly structured implementation.

### Implementation Summary

- Replaced `space_trainer/app.py` entirely with a new architecture and new UI/CSS/HTML structure.
- Kept all major operational capabilities:
  - dataset download and cache handling
  - runtime config generation
  - staged training subprocess orchestration
  - optional post-training evaluation fallback path
  - quality gate + push status surfacing
  - continuous auto-restart with cooldown and circuit breaker
  - cancellation controls
  - run history persistence and recent-runs panel
- Kept compatibility for existing tests and tooling contracts (e.g., helper function names used by tests and preflight checks).

### Monochrome Redesign

- New monochrome command-center visual language with grayscale-only palette.
- New telemetry card layout, stage timeline, recent-runs view, and loss sparkline styling.
- New hero header and runtime timestamp script in `UI_HEAD`.

### Verification Executed

1. Syntax check:
- `../.venv/bin/python -m py_compile app.py`
- Result: PASS

2. Preflight:
- `../.venv/bin/python scripts/preflight_check.py --json`
- Result: PASS (`"ok": true`)

3. Unit tests:
- `../.venv/bin/python -m unittest discover -s tests -v`
- Result: PASS (`Ran 15 tests`, `OK`)

4. Gradio config smoke check:
- `../.venv/bin/python - <<'PY' ... app.demo.get_config_file() ... PY`
- Result: PASS (`mode=blocks`, `components=44`, `dependencies=3`, `stage_count=4`)

---

## Footer + Continuous Enforcement Session

Date (UTC): 2026-02-28 12:45:36 UTC

### Requested Changes

- Remove default Gradio footer controls (`Use via API`, logo, settings) from footer area.
- Place API/settings access in a better UI location.
- Ensure training runs in continuous mode.

### Implementation

1. Footer controls removed from Gradio launch:
- Added `footer_links=[]` in `demo.launch(...)`.

2. API/settings moved into hero section:
- Added `.mono-link-row` with:
  - `/gradio_api/docs`
  - `https://huggingface.co/spaces/NorthernTribe-Research/math_trainer/settings`
- Added matching CSS styles for the new header links.

3. Continuous mode enforced:
- Runtime enforcement in `run_pipeline(...)`:
  - `continuous_mode = not bool(preflight_only)`
- UI control locked to enforced-on:
  - `Continuous Auto-Restart (Enforced)` with `interactive=False`.

### Verification

- `../.venv/bin/python -m py_compile app.py` -> PASS
- `../.venv/bin/python scripts/preflight_check.py --json` -> PASS
- `../.venv/bin/python -m unittest discover -s tests -v` -> PASS (`Ran 15 tests`, `OK`)

### Deployment

- Space: `NorthernTribe-Research/math_trainer`
- Commit: `c8a24f966d710173764da0355e56632af9e66c40`
- Runtime after deploy: `RUNNING`
- `https://northerntribe-research-math-trainer.hf.space/config` -> `200` JSON