Verdict. Accept with completion conditions. Place Meeting and occurrence-scoped MeetingParticipation under WM-ACT-025; CommunicationChannel, DiscussionThread, turns and MessageReference under WM-ACT-027; complete reserved WM-REC-012 as the durable-record module. MeetingParticipation needs independent identity. Minutes and transcript are separate works. Reject readings that give EM-KNW-03 mastership, treat participation as a (Meeting × Party) link, merge minutes and transcript, or let discussion, meeting close, or minutes certification change official task or decision status.

Strongest evidence. Four authorities stay uncollapsed: WM-ACT-027 interaction; WM-ACT-025 meeting occurrence and participation; WM-REC-012 certified record; separate task and decision authorities. No automatic promotion is the only rule that stops chat agreement from forging official status. Distinct invitation, presence, participation, vote, assent and approval match distinct lifecycles. Quote-inherits-stricter-scope is required once MessageReference can move a restricted turn into a wider minutes audience.

Strongest counterexample. A standing-team thread reaches consensus with no Meeting and no certified WM-REC-012 expression, yet operations treat the thread as binding. The model correctly refuses official status, then fails operationally unless task and decision authorities expose a non-forging provisional state. Failure modes: dummy Meeting laundering chat into WM-REC-012; MessageReference treated as the record; channel reclassified as Meeting. Without independent MeetingParticipation identity, speaker anchors cannot cite a late-joining or dual-role participant separately from Party and channel membership.

Identity / mastership. WM-ACT-025 masters Meeting/Session and MeetingParticipation. MeetingParticipation is independent, bound to exactly one occurrence, not reused, and not standing membership, org-role, channel membership, or a WM-REC-012 speaker label. One party may hold multiple capacities or sequential episodes; votes, anchors and in-meeting attribution need that referent. If published WM-ACT-025 treats participation only as a link, independent identity is still required under WM-ACT-025. EM-KNW-03 mints no second participation id and no parallel Meeting id. WM-ACT-027 masters CommunicationChannel, DiscussionThread and MessageReference. A meeting may use a channel; the channel is not the meeting. WM-REC-012 masters minutes work, transcript work, expressions, certification, per-passage access/redaction and retention. Task authority masters Task; discussion creates only a TaskProposal. Decision authority masters Decision and the authorized decision occurrence; discussion creates only a DecisionAlternative. EM-KNW-03 links these; it does not take mastership.

WM-REC-012 boundary. In: minutes work; transcript work; draft versus approved expressions; certification bound to one WM-ACT-025 occurrence; agenda/time/speaker locators; per-passage access and redaction; retention; citations to MeetingParticipation, MessageReference and agenda items. Out: meeting and participation; channel, thread and MessageReference identity; live invitation, presence, vote, assent and official approval; task and decision authorities. It records and certifies; it does not convene, converse, assign or decide. Approved minutes are not the decision act. Minutes and transcript are separate works. Transcript is descriptive, time/speaker-anchored, correctable, typically stricter. Minutes are the curated official record; the approved expression is the immutable fixed record. Cardinality: 0..1 official minutes work and 0..n transcript works per occurrence; either may exist without the other.

Promotion rules. WM-ACT-027 discussion may create a TaskProposal or DecisionAlternative; precursors have no official status. Only task authority mints a Task. Agenda placement is not a decision. Official decision status changes only when an authorized decision occurrence fires and a fixed WM-REC-012 approved expression exists; both required; order may vary. Thread reactions are interaction evidence, not meeting votes and not official approval, unless decision authority designates that occurrence (default: it has not). Lineage is append-only. Minutes certification records; it does not mint the Decision. Meeting close does not auto-promote. Quorum binds to the decision occurrence and MeetingParticipation identities, not the channel roster.

Access / quotation. Quote access is min(source, passage, container, quote-site) and never widens. Channel membership is not minutes, transcript or decision-record access. Participation does not grant passage-level transcript rights. Redaction overlays the expression; it does not delete the cited discussion, MeetingParticipation or decision occurrence. Quoting a redacted passage yields a redacted or refused quote. An approved expression is immutable; later restriction is an overlay or derivative. Chat quotation of a later official decision stays at chat scope until the quote cites the fixed record.

Scenario. Channel C hosts thread T. A posts a task-proposal turn. B posts a decision-alternative turn cited by MessageReference R2. Invitations issue for Meeting X; invitation is not presence or participation. Meeting X occurs with occurrence-scoped MeetingParticipation identities. Decision authority fires D on the alternative cited by R2; task authority may separately accept the task proposal. Minutes work Minutes_X is created; optional separate transcript work Transcript_X may be created. Approved expression E_min is certified and immutable; anchors cite MeetingParticipation. If E_min quotes via R2, the quote inherits the stricter scope. Readers see proposals in T; official status only from D plus fixed E_min.

Invariants.

1. EM-KNW-03 mints no parallel Meeting identity.
2. Each MeetingParticipation has its own identity, bound to exactly one WM-ACT-025 occurrence.
3. Channel membership is not MeetingParticipation.
4. Invitation, presence, participation, vote, assent and official approval are pairwise non-implying.
5. DiscussionThread and MessageReference cannot carry official task or decision status.
6. TaskProposal is not Task; DecisionAlternative is not Decision.
7. Official decision status requires an authorized decision occurrence and a fixed approved WM-REC-012 expression.
8. Minutes work identity is not transcript work identity.
9. An approved expression is immutable; correction is a new expression or overlay.
10. Quote access equals min(source, thread/channel, cited passage, destination).
11. WM-REC-012 speaker and attendance anchors cite MeetingParticipation, not Party or channel member.
12. Meeting close does not auto-promote precursors.

Minimum completion shape. WM-ACT-025: occurrence-scoped MeetingParticipation identity plus distinct invitation, presence, participation and in-meeting vote acts. WM-ACT-027: MessageReference mastership for edit, delete, forward and nested quote; channel–meeting binding. WM-REC-012: minutes and transcript works; draft and approved expressions; certification; anchors; per-passage access/redaction; retention; corrigendum path. Typed precursor hooks into task and decision authorities. Access-scope comparator. Certification actor. Non-forging provisional states on the external authorities.

Blockers. WM-REC-012 has no specification. Task and decision authorities are external; promotion needs typed hooks not given here. Owner of invitation, presence, vote, assent and official approval is unnamed; they must remain distinct types, not flags on MeetingParticipation. MessageReference edit/delete/forward/nested-quote mastership is unspecified. Stricter-access comparator is undefined. Dual-mastership risk if Meeting and Minutes work are both treated as the record of what was decided. Channel–Meeting binding, corrigendum path, redaction-versus-retention conflict and certification actor are unspecified.