What the lint found

The src/runtimes/python/extension.rs extension implements prompt_supplement(), which causes wrap_prompt_append() to emit a - bash: | step with displayName: "Append Python prompt" whenever the Python runtime is enabled. However, no fixture in FIXTURES included runtimes.python, so this bash body was never passed to shellcheck and had no quality story.

There was no lint failure because the step wasn't exercised at all — the gap was invisible until this audit.

How it was fixed

• Rule: Step 4c — expand fixture coverage for a real, currently-unreached bash generator.
• Fix: Added python: true to tests/fixtures/runtime-coverage-agent.md so the Python extension's prompt_supplement bash step is compiled and linted on every PR.
• Tracking: Added "Append Python prompt" to REQUIRED_STEP_DISPLAY_NAMES in tests/bash_lint_tests.rs so a future rename or removal of this step surfaces as a test failure rather than silently slipping by.
• Files touched: tests/fixtures/runtime-coverage-agent.md, tests/bash_lint_tests.rs.

Verification

All checks pass on the branch:

ENFORCE_BASH_LINT=1 cargo test --test bash_lint_tests -- --nocapture
# test result: ok. 2 passed; 0 failed

cargo test
# All test suites pass

cargo clippy --all-targets
# No new errors or warnings introduced

network:
  allowed:
    - defaults
    - "dev.azure.com"
    - "releaseassets.githubusercontent.com"

Generated by Bash Step Hygiene Auditor · ● 2.7M · ◷