weichen 5825cd35f2 Propose EXT-5 host document parse and tighten the surface snapshot ...

Why: downstream parsers are unreachable through the Host handle and the base lacks xlsx/pptx parsers; MS1 needs both. The snapshot also missed interface methods, so adding one was undetectable.

Evidence: request follows compat-policy sect.6 four elements; behavior contract and limits in the proposal body (documents has no CI; verified via git diff --check recorded on the Dev task card).

Impact: docs only; compat-policy sect.3 gains one sentence, usage.md format list gains xlsx/pptx.

Refs: docs/proposals/2026-10-06-ext-5-host-parse-document.md

2026-10-06 14:44:17 +00:00

..

plugin-development.md

Document the base extension roadmap and plugin contract v2

2026-10-01 10:34:30 +00:00

prompt-library-design.md

Move WebSearch to ported in the catalog disposition table

2026-09-30 11:00:11 +00:00

usage.md

Propose EXT-5 host document parse and tighten the surface snapshot

2026-10-06 14:44:17 +00:00