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