Bug: | block scalar description in safe-inputs breaks generated Python script

[srgibbs99]

Bug: | block scalar description in safe-inputs breaks generated Python script

Version: v0.50.6

Summary

When a safe-inputs tool uses YAML | (literal block scalar) for its description, gh aw compile emits only the first line with a # prefix. The remaining lines are written as bare unindented text, causing a SyntaxError at runtime.

Minimal repro

safe-inputs:
  my-tool:
    description: |
      First line of description.
      Second line of description.
      Third line of description.
    inputs:
      foo:
        type: string
    py: |
      print("hello")

After gh aw compile, the generated Python script contains:

# Auto-generated safe-input tool: my-tool
# First line of description.
          Second line of description.
          Third line of description.

The continuation lines have no # prefix, so Python raises:

SyntaxError: invalid syntax

The tool fails silently — the agent receives an MCP error and proceeds without it for the entire run.

Expected behavior

All lines of the block scalar description should be emitted as #-prefixed comments.

Workaround

Use a quoted single-line string instead of |:

    description: "First line of description. Second line of description."