Atomically allocate the next number for a sequence (e.g. ADR/migration). Returns the FORMATTED id to write. Collision-free across all callers; the sole source of the number.

Initialize/seed a sequence at an existing offset and set its format (prefix + zero-pad), e.g. seed 'adr' at 102 with prefix 'R'. Never rewinds a counter.

Announce your presence in a lane with an optional short status (who-owns-what + liveness).

List actors seen within the liveness window (lane-scoped if lane is given). Check before touching a shared surface.

Send an attributable prose note/handoff to a lane and/or actor, with optional subject/ref/tag.

Read prose posts in this workspace. to_me = addressed to you or your lane; unacked_only for your inbox.

Acknowledge a post (read receipt). Idempotent.

Advisory lease on a surface (file/path) — visibility, not a hard lock. Returns current overlapping holders.

Release your active lease(s) on a surface.

List active advisory leases in this workspace (optionally for one surface).

Create a task (open, or assigned if an owner is given).

Assign a task to an owner (open/assigned → assigned).

Start a task (assigned → in_progress).

Mark a task blocked, optionally on another task id, with a reason (in_progress → blocked).

Resolve a task's blocker(s); returns to in_progress when none remain.

Ship a task (in_progress → done).

List tasks in this workspace (filter by status/owner/lane), each with its open-blocker count.

Query the append-only ledger with exact filters (no semantic search). AND-combined; newest first.

Session-start digest: everything since your cursor + unacked posts, active leases, and latest claim per sequence. Advances your cursor.

Latest claimed number per sequence in this workspace (fast collision audit).

List this project's sequences with their shape: name, prefix, pad, last_used, next, and the formatted id the NEXT claim will return. Read this instead of guessing sequence names or prefix/pad conventions; if the sequence you need is missing, ask before seeding.

Return your resolved identity: qualified actor (handle/label), project, and admin flag.

List every participant granted into THIS project (the roster): name, kind, lane, admin flag, and whether their token is active. Use before admin_provision to avoid creating a duplicate.

Project-admin only: create (or re-token) a teammate participant in THIS project and mint its bearer token + a ready connection config (shown ONCE). Hand the returned setup to the teammate. Lane is an optional label (does not partition anything). Set is_admin only for another lead.

Project-admin only: mint a project invite + a copy-paste onboarding prompt to send a teammate. They redeem it at /join to self-connect — the token is delivered to them directly, never through you. Omit participant_name to let them choose their own name.

Project-admin only: revoke a teammate's active token(s) in THIS project, by participant name. Scoped to your project; their history is preserved; they are locked out until re-granted or rotated. Returns the count revoked (0 = no such participant here / nothing active).

Project-admin only: rotate a teammate's token in THIS project, by participant name - mint a fresh token THEN revoke the old one(s) in one transaction (no lockout gap). Returns the new token + a ready connection config (shown ONCE); hand the returned setup to the teammate.