Bug: {{#import}} directives in markdown body are never resolved #28019

Summary

{{#import shared/file.md}} directives placed in the markdown body of a workflow are recognized by the compiler (listed as "Includes" in the lock file manifest) but their content is never injected into the agent prompt — neither at compile time nor at runtime.

Expected behavior

Per the Imports reference:

Use imports: in frontmatter or {{#import ...}} in markdown to share workflow components across multiple workflows.

{{#import shared/file.md}} should inline the content of shared/file.md at that position in the prompt, similar to how imports: YAML entries produce {{#runtime-import}} directives that are resolved at runtime.

Actual behavior

1. Compile time: The compiler scans the body, finds {{#import shared/file.md}}, and records it in the lock file manifest as an "Include" — but does NOT convert it to {{#runtime-import}} and does NOT inline the content.

2. Runtime: interpolate_prompt.cjs (STEP 1: Runtime Imports) only resolves {{#runtime-import ...}} directives. {{#import ...}} directives pass through as raw literal text.

3. Result: The agent sees the raw string {{#import shared/file.md}} in its prompt. The referenced content is completely absent.

Reproduction

# my-workflow.md
---
imports:
  - shared/working-import.md    # ← this works
---

# Instructions

{{#import shared/broken-import.md}}  # ← this does NOT work

After gh aw compile, inspect the lock file:

# Resolved workflow manifest:
#   Imports:
#     - shared/working-import.md        ← converted to {{#runtime-import}}
#   Includes:
#     - shared/broken-import.md         ← listed but NOT resolved

At runtime, the prompt contains the literal text {{#import shared/broken-import.md}} — the content of broken-import.md is never injected.

Environment

• gh-aw version: v0.68.3
• Compiler: gh aw compile completes with 0 errors, 0 warnings
• Affected: any workflow using {{#import}} in the markdown body

Workaround

Move {{#import}} references to the imports: YAML key in frontmatter. This produces {{#runtime-import}} directives that the runtime correctly resolves.

Impact

In our repo, 12 workflows with 28 total {{#import}} directives are affected — shared instructions for sub-agent delegation, wiki context, breadcrumb footers, context diaries, and branch resolution are never seen by agents.