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98 lines
3.5 KiB
Markdown
98 lines
3.5 KiB
Markdown
# AGENTS.md — Guidance for OpenAI Codex
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## Execution Commands
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- **Always** invoke Python scripts via the startup wrapper, which installs dependencies globally and then runs your code under the system Python:
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```bash
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./startup.sh --offset <months> --end <YYYY-MM-DD> --extend-years <N>
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````
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* **Never** call `refresh_data.py` from within a Task Command. This environment has **no internet access**, so attempts to fetch external data will fail. Data in `data/fred.db` must already be present.
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## Project Overview
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This repository, **python\_charts**, provides a framework for fetching economic time series from FRED, storing them locally, and producing custom matplotlib charts with configurable parameters. The core components are:
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* **`startup.sh`**: Single‐entrypoint script to install dependencies globally, ensure local data is present, and run specified commands under system Python.
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* **`Makefile`**: Convenient high‐level targets (`install`, `data`, `plot`, `plot‐custom`, `test`, `clean`) that funnel through `startup.sh` for reproducible builds.
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* **`scripts/refresh_data.py`**: Downloads UNRATE and DCOILWTICO series into `data/fred.db`—**only run in an internet-connected environment**, not in Codex/CI.
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* **`scripts/lagged_oil_unrate_chart_styled.py`**: Generates the lagged oil vs. unemployment chart with fixed axes styling and log scale.
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Future extensions will add additional custom chart scripts under `scripts/`, all driven by the same bootstrapping and command conventions.
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## Usage Conventions
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### Primary Commands
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* **Bootstrap & default plot**:
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```bash
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./startup.sh
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```
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Installs/upgrades dependencies globally and runs the default lagged‐oil chart with an 18-month offset.
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* **Custom plot**:
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```bash
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./startup.sh --offset 12 --end 2025-05-31 --extend-years 5
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```
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* **Data refresh (offline environments)**:
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* **Do not** run `refresh_data.py` in Codex/CI — data must already be in `data/fred.db`.
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* To update data in an internet-connected shell, run:
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```bash
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python scripts/refresh_data.py
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```
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* **Run tests**:
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```bash
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./startup.sh pytest -q
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```
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### Argument Rules
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* If the first token starts with `--`, it’s forwarded to the default chart script.
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* If the first token names a `.py` script, it’s executed via `python <script>`.
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* Otherwise, commands are executed directly (e.g., `pytest`, `flake8`).
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## Coding Standards
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* **Python**: Target version ≥ 3.8. Use type hints for all function signatures. Follow PEP8 with Black formatting.
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* **Bash**: `startup.sh` uses `set -euo pipefail`.
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* **Makefile**: Use tab-indented commands. All targets should funnel through `startup.sh`.
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## Testing & Validation
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* **Automated tests**: Add pytest modules under `tests/` following the pattern `test_*.py`.
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* **Data mocking**: For new chart scripts, mock FRED downloads via monkeypatching `pandas_datareader.data.DataReader`.
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* **Figure tests**: `tests/test_plot.py` ensures `plot_lagged` returns a figure with two axes and at least one line.
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## Extending with New Charts
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1. **Create** `scripts/custom_chart.py`.
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2. **Implement** a `main()` with `argparse` for `--start`, `--end`, `--offset`, etc.
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3. **Invoke** via:
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```bash
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./startup.sh python scripts/custom_chart.py --your-args
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```
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4. **Optionally** add a Makefile target if desired.
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## CI / Codex Integration
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* **Setup Script** →
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```bash
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chmod +x startup.sh && ./startup.sh
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```
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* **Task Command** →
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```bash
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./startup.sh --offset 18
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```
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*End of AGENTS.md — tailored for python\_charts repo* |