Add failing tests for #8: template injection bug

[Serhan-Asad]

Summary

Adds failing tests that detect the template injection bug reported in #8.

Test Files

• Unit test: tests/test_issue_8_template_injection.py
• E2E test: tests/test_e2e_issue_8_template_injection.py

What This PR Contains

• Failing unit tests that reproduce the reported bug
• Failing E2E tests that verify the bug at integration level
• Tests are verified to fail on current code and will pass once the bug is fixed

Root Cause

The load_prompt_template() function in pdd/load_prompt_template.py doesn't call preprocess() to expand <include> directives. When Step 5's template contains <include>docs/prompting_guide.md</include> and the prompting guide has JSON examples with braces like {"type": "module"}, Python's .format(**context) at line 521 of agentic_change_orchestrator.py interprets those braces as template variables, causing KeyError: '\n "type"'.

Test Coverage

The test suite includes:

1. Unit Tests (test_issue_8_template_injection.py):

   • test_load_prompt_template_should_preprocess_includes: Verifies that load_prompt_template() should expand <include> directives and escape braces
   • test_step5_template_has_unprocessed_include: Integration test reproducing the exact Issue Generating files from default preprocessed prompt name fails: could not determine language #8 scenario
   • test_load_prompt_template_should_call_preprocess: Root cause verification using mocking

2. E2E Tests (test_e2e_issue_8_template_injection.py):

   • test_orchestrator_step5_with_include_directive: Primary E2E test simulating the exact user workflow
   • test_orchestrator_full_context_with_include: Tests with full orchestrator context
   • test_multiple_includes_in_template: Regression test for multiple includes

Next Steps

1. Implement the fix in pdd/load_prompt_template.py to call preprocess()
2. Verify all unit tests pass
3. Verify all E2E tests pass
4. Run full test suite to check for regressions
5. Mark PR as ready for review

Fixes #8

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Generated by PDD agentic bug workflow (Steps 1-10)

[Serhan-Asad]

Step 10: Draft PR Created ✅

What's Included

This PR adds comprehensive failing tests for the template injection bug:

• Failing unit tests at tests/test_issue_8_template_injection.py (3 tests)

  • test_load_prompt_template_should_preprocess_includes: Verifies that load_prompt_template() should expand <include> directives
  • test_step5_template_has_unprocessed_include: Integration test reproducing the exact scenario
  • test_load_prompt_template_should_call_preprocess: Root cause verification using mocking

• Failing E2E tests at tests/test_e2e_issue_8_template_injection.py (3 tests)

  • test_orchestrator_step5_with_include_directive: Primary E2E test simulating the exact user workflow
  • test_orchestrator_full_context_with_include: Tests with full orchestrator context
  • test_multiple_includes_in_template: Regression test for multiple includes

Test Results

All 6 tests correctly fail on the current buggy code, detecting that:

• load_prompt_template() doesn't import preprocess from pdd.preprocess
• <include> directives remain unprocessed in templates
• The function returns raw file content instead of preprocessed templates

Next Steps for Maintainers

1. Review the failing tests to understand the expected behavior
2. Implement the fix in pdd/load_prompt_template.py to call preprocess()
3. Verify all 6 tests pass with your fix
4. Run full test suite to check for regressions
5. Mark the PR as ready for review

PDD Fix Command

To auto-fix this bug using PDD, first create a prompt file (if one doesn't already exist), then run:

pdd --force fix --loop --max-attempts 5 --verification-program context/load_prompt_template_example.py <prompt_file> pdd/load_prompt_template.py tests/test_issue_8_template_injection.py

Note: A prompt file for load_prompt_template.py needs to be created first. The fix should:

1. Import preprocess from pdd.preprocess
2. Call preprocess() on the template content before returning it
3. This will expand all <include> directives and escape braces in included content

Impact Summary

• Root Cause: load_prompt_template() doesn't preprocess <include> directives
• Bug Location: pdd/load_prompt_template.py
• Frequency: 100% failure rate at step 5 of pdd change workflow
• Cost Impact: ~$1.27-$1.57 wasted per failed attempt
• User Experience: Complete workflow blockage

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Investigation complete. Generated by PDD agentic bug workflow (Steps 1-10)

[gltanaka]

Reopening: this PR was automatically closed by a force push to main on Feb 9, not intentionally.