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fix(compilation): raise clear error when managed_section file is missing #1627

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fix(compilation): raise clear error when managed_section file is missing #1627

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5b18619
fix(compilation): raise clear error when managed_section file is missing
YashpalLohan Jun 2, 2026
627ccbd
Merge branch 'main' into fix-managed-section-missing-file
yashpal-2004 Jun 3, 2026
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14 changes: 6 additions & 8 deletions src/apm_cli/compilation/agents_compiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1276,22 +1276,20 @@ def _write_output_file_with_config(

if config.agents_md_mode == "managed_section":
target = Path(output_path)
if not target.is_file():
raise ManagedSectionError(
f"{target} does not exist yet. "
"Create it with the managed-section markers first, "
"or set agents_md.mode: full in apm.yml for initial generation."
)
existing = target.read_text(encoding="utf-8")
try:
if not target.exists():
raise ManagedSectionError(
f"[{target.name}] does not exist yet. Create it with markers first, or use mode: full for initial generation."
)
existing = target.read_text(encoding="utf-8")
content = apply_managed_section(
existing,
content,
config.agents_md_start_marker,
config.agents_md_end_marker,
)
except ManagedSectionError as exc:
raise ManagedSectionError(f"[{target}] {exc}") from exc
raise ManagedSectionError(f"[{target.name}] {exc}") from exc
elif config.agents_md_mode != "full":
raise ValueError(
f"Unknown agents_md.mode {config.agents_md_mode!r}. "
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6 changes: 6 additions & 0 deletions tests/unit/compilation/test_managed_section.py
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Expand Up @@ -374,5 +374,11 @@ def test_write_output_file_managed_section_directory_at_path(self, tmp_path):
)

compiler = AgentsCompiler(str(tmp_path))
with pytest.raises(ManagedSectionError) as exc_info:
compiler._write_output_file_with_config(str(output_file), "New content.\n", config)

msg = str(exc_info.value)
assert "AGENTS.md does not exist yet. Create it with markers first, or use mode: full for initial generation." in msg
assert msg.startswith("[")
with pytest.raises(ManagedSectionError, match=r"(?i)does not exist|not exist|create it"):
compiler._write_output_file_with_config(str(output_file), "New content.\n", config)
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