[holmboe]

Summary

First of three stacked pull requests that let a task be exported to a spec, edited and applied back. This one stands alone.

Every string in a spec is a Jinja2 template. A description or a paste that only quotes one, such as {{ .Values.tag }} in a Helm example, was refused as undefined-variable, and no escape survived both the offline check and the render.

• interpolate: false in the envelope sends every string exactly as written. It applies to create and search specs alike.
• Such a spec takes no variables. A variables: section or a --set is the new problem code interpolation-off.
• A value that is not true or false is wrong-type and leaves interpolation on.
• Documents of a multi-document file that disagree about it are refused, like any other envelope key.
• The JSON Schema, the generated tables in docs/phorge-spec.md and phabfive/SKILL.md describe the key.

There is deliberately no per-string escape: {% raw %} is outside the portable subset.

Test plan

• tests/test_spec_interpolate.py pins the old refusal and covers the new key: offline validation, rendering, to_data(), the schema, multi-document files, and --set against a literal spec.
• Full unit suite, ruff, ruff format, mypy, scripts/gen_spec_docs.py --check and mkdocs build --strict.
• make test-e2e against a local Phorge stable: 153 passed, 2 skipped.

🤖 Generated with Claude Code