md2wechat 3.x for Agents: What Changed

The 3.x line is about determinism for agents: one catalog, preflight before side effects, and official installers. Layout catalog.

3.0 — the catalog became the single source

User layout YAML overrides were removed. The embedded catalog (56 recommended syntax names, 77 scenario entries, 63 render-layer capabilities) is the only source of truth, and unknown fields or variables fail closed. For agents this means discovery output is stable across machines.

3.2 — preflight and the official OpenClaw installer

Preflight moved intent, asset, and cover validation before any auth or remote call — a failed run no longer burns a credential check. OpenClaw distribution switched to the official npm-based metadata.openclaw installer (openclaw skills install @geekjourneyx/md2wechat).

3.3 — the counts contract

The layout catalog counts (56 / 77 / 63) became a pinned contract with conformance witnesses — 56 canonical plus variants and 3 compatibility modules. Docs and discovery now agree by construction.

3.4 — subject-reference images

generate_image --subject-reference <https URL> keeps a consistent subject across generated images, on MiniMax image-01 only, with supports_subject_reference exposed in providers list. The publishing-oriented flow pairs with plan mode for host-agent rendering (Image Generation).

Verify what you run

md2wechat version --json
md2wechat capabilities --json

Version facts above are the changelog record; verify your installed binary before wiring a pipeline to any of it.