<?xml version="1.0" encoding="UTF-8"?>
<gsl-prompt id="20250729T145215-0400" type="feat">
<gsl-header>

# OBK Error Handling Strategy
</gsl-header>
<gsl-block>

<gsl-purpose>
<gsl-title>

## 1. Purpose
</gsl-title>
<gsl-description>

Ensure the OBK CLI has a robust error handling strategy. 
</gsl-description>
</gsl-purpose>

<gsl-inputs>
<gsl-title>

## 2. Inputs
</gsl-title>
<gsl-description>

This table lists key artifacts—tools, articles, or other sources—that directly guide or constrain the OBK scaffold.

| Input                                                   | Notes   |
| ------------------------------------------------------- | ------- |
| ChatGPT / Codex                                         | Tool    |
| **How to Integrate Robust Error Handling in Python**    | Article |

</gsl-description>
</gsl-inputs>

<gsl-outputs>
<gsl-title>

## 3. Outputs
</gsl-title>
<gsl-description>

This section lists the main components produced by the OBK scaffold.

* Custom exceptions for CLI commands (e.g., "divide", "fail")
* Global exception hook
* Logging configuration
</gsl-description>
</gsl-outputs>

<gsl-workflows>
<gsl-title>

## 4. Workflows
</gsl-title>
<gsl-description>

This section lists the main steps or processes required to complete tasks in the project.

* Add custom exception classes
* Add CLI commands "divide" and "fail"
* Implement global exception handler
* Add/Update logging setup
* Add and test logging to file
* Document error codes and logging behavior
</gsl-description>
</gsl-workflows>
<gsl-acceptance-tests>
<gsl-title>

## 5. Acceptance Tests
</gsl-title>
<gsl-acceptance-test id="1">
<gsl-performed-action>

1. When I run the CLI commands below, I get the results in the comments next to them. 
</gsl-performed-action>
<gsl-expected-result>

    ```powershell
    obk divide 4 2                  # creates or appends to obk.log by default
    obk --logfile my.log divide 4 2 # specify a custom log file
    obk divide 1 0                  # writes an error to the log and exits with code 2
    obk fail                        # writes a fatal error to the log and exits with code 1
    python -m obk divide 4 2        # module invocation
    ```
</gsl-expected-result>
</gsl-acceptance-test>
</gsl-acceptance-tests>
</gsl-block>
</gsl-prompt>
