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

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ui-redesign-demos

Add UI redesign and auth design proposal with HTML demos

2026-09-30 09:59:40 +00:00

2026-09-29-system-skeleton-design-and-plan.md

R4: add the global native-deployment constraint

2026-09-29 17:26:34 +00:00

2026-09-30-card-stream-artifact-unify-project-inbox.md

Mark card stream / artifact / project inbox proposal approved (D49 confirmed)

2026-09-30 17:44:57 +00:00

2026-09-30-cardflow-and-process-split.md

Add cardflow-and-process-split proposal (D39-D43) and update guides

2026-09-30 16:39:47 +00:00

2026-09-30-configuration-surface.md

Design the startup configuration surface and instance conventions

2026-09-30 04:15:03 +00:00

2026-09-30-cross-session-reading.md

Propose layered cross-session reading with on-demand peer tools

2026-09-30 14:58:15 +00:00

2026-09-30-dual-tier-storage-and-multitenancy.md

Document the dual-tier storage

2026-09-30 02:39:50 +00:00

2026-09-30-file-preview-and-reserved-capabilities.md

Record the user adjudication of the preview decision points

2026-09-30 16:15:41 +00:00

2026-09-30-ui-inbox-command-workspace.md

Add UI foundation proposal (inbox, command bus, workspaces)

2026-09-30 05:48:38 +00:00

2026-09-30-ui-redesign-and-auth.md

Record the chat-order and artifact-files fix round in the proposal

2026-09-30 15:22:33 +00:00

2026-10-01-agent-harness.md

Propose the agent stack audit and completion design

2026-10-02 16:27:37 +00:00

2026-10-01-base-extension-roadmap.md

Propose the agent stack audit and completion design

2026-10-02 16:27:37 +00:00

2026-10-01-extension-compat-policy.md

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

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

2026-10-01-plugin-contract-v2.md

Document the base extension roadmap and plugin contract v2

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

2026-10-02-agent-stack-completion.md

Record the SillyTavern design borrow and what shipped

2026-10-04 18:20:10 +00:00

2026-10-05-ext-1-inproc-command-handler.md

Add EXT-1 inproc command handler proposal; align tag name to v0.2.0

2026-10-06 14:42:57 +00:00

2026-10-06-ext-5-host-parse-document.md

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

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