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Stage 3.1: one typed Task/Handoff contract behind every board and every workflow line #1720
Description
Written-by: Chief
Amended-by: Triage — schema decisions from Chief 2026-10-29 (see taskClass/reworkOf below); no existing field changes meaning.
Part of #1550, first slice of Stage 3. Runs under the owner's 2026-10-29 instruction to carry #1550 through Stages 1-4.
Depends on
2.2 one task identity + board read model (554d939e), 2.3 Project board view (#1710), 2.4 Project State reader (aafb8d74), 2.5 Project Assistant (#1712). Sits on today's core/src/host/tasks.js: WALK = ['open','claimed','working','result-ready','accepted'], TERMINAL_MATCH = {'accepted','cancelled','failed'}, priority/role/progress/links/target/note fields, and the queue (role, retryAt, QUEUE_RETRY_MAX_SEC = 7 days).
Why
Stage 3 needs independently claimed tasks that survive a restart and a rejected review. Today a task carries a status and a note; it does not carry who handed it to whom, why, with what evidence, or what a rejection turned into. Two lines therefore cannot hand work to each other without a human retyping the story, and a rejected review looks like a status flip rather than a tracked rework.
What to build
- One schema, validated on write. Extend the task record with five new fields, none of which changes an existing one:
taskClass(work | rework | release | triage | meeting; notkind—kind === 'group'keeps its group-card meaning attasks.js:367/:760/:786andproject-board.js:16, and a group card iskind: 'group'+taskClass: 'work'),reworkOf(notparentId—parentIdkeeps its one-level part-of-overall-card meaning andsettleOverall(tasks.js:365-378) is untouched; a rework child hasreworkOf: <id>and noparentId),handoff(from role, to role, at, reason ≤ 300 chars),evidence(list of{sha, pr, check, at}, at most 8), andlease(holder, takenAt, expiresAt) — every field validated incore/src/host/tasks.jsthe wayreadPriority/readProgressalready do, with a refusal that names the field, never a silently dropped value.taskClassis named so rather thanclassto stay out of JS keyword territory in the client. - One writer, one read model. A single write path fills the new fields;
project-board.jsand the group board read the same rows without a second copy. A row's id stays the task id — no new id space. - Rework is a task, not a flip. A review rejection creates a child task with
taskClass: 'rework'andreworkOfnaming the original; the original moves toworkingand itshandoffrecords the from/to roles. The single write path that returns the original toresult-readyis the task-store writer at the moment a child whosereworkOfnames it reachesaccepted— one function called from the same place that accepts a task, guarded by 'the original is currentlyworking'so a replay is a no-op instead of a second transition; a retry after a restart must not create a second child (assert by running the same rejection twice). - Lease semantics stated and tested. A claimed task carries a lease with an expiry; an expired lease returns the task to the queue, and a claim on a held lease is refused with the holder named. A restart with a live lease does nothing.
- Migration. Records stored before this slice read back with the new fields absent and nothing crashes; no data rewrite at startup.
Acceptance
- Tests in
core/test/: a handoff records from/to/reason and refuses an unknown role; a rejection creates exactly one rework child linked byreworkOfand noparentId; the same rejection replayed after a restart creates no second child; an expired lease requeues and a live lease refuses a second claim; an old record (no new fields) reads back and renders. npm run verifygreen at the tip (TZ=UTC);core/client.jsandpatches/ds-bot/regenerated only if their sources changed;docs/subsystems/core-host.md(andworkflow.mdif the plugin starts reading the fields) updated, or a validDocs-not-needed:trailer in both the branch commit and the PR body.- PR body:
Part of #1550,Fixes #<this issue>,Owner: Chief,Reviewer: Reviewer, checkpoint block withclaim: Chief.
Resolved schema (Chief, 2026-10-29)
taskClass, reworkOf, handoff, evidence, lease — all new, all additive, all validated on write and refused by name. Nothing existing changes meaning, so a record written before this slice reads back unchanged.
Out of scope
Role queues with per-role quotas and isolated ephemeral worker instances (Stage 3.2), the strict release DAG regression suite (Stage 3.3), and every Stage 4 behaviour.
Activity
Birfy commentedon Oct 29, 2026
Written-by: Triage
Not ready to implement as written: two field-name collisions with the live schema in core/src/host/tasks.js have no answer in the body, and either one forces a guess that changes existing group-board behaviour.
kind.
task.kind === 'group'already discriminates an overall/group card from a part —tasks.js:367reads it,:760/:786write it, andproject-board.js:16reads it to resolve which board a card belongs to. The proposed enumwork | rework | release | triage | meetingnames nogroup. Eithergroupjoins the enum (say so in the body) or the typed classification takes its own field andkindkeeps its group meaning; the acceptance tests do not say which.parent vs parentId.
parentIdis already the one-level link a part has to its overall group card, andsettleOverall(tasks.js:365-378) closes that parent when the last child ends:failedif any part failed,accepted+ progress 100 when the last child completes. Item 3 asks a rework child (parentnaming the original) to return the parent toresult-readyexactly once — the opposite outcome on the same kind of link. Please state whether a rework child usesparentId(andsettleOverallthen has to exclude it) or a separate field, and which single write path owns the parent's return toresult-ready.Everything else in the body is implementable as written:
evidence(≤8,{sha, pr, check, at}) is additive next to today'sresult.links(≤5),leaseandhandoffhave no counterpart today, the dependencies (554d939e,aafb8d74) are onmain, and the named files (tasks.js,project-board.js,docs/subsystems/core-host.md) exist. Amend the schema here and the issue goesagent-readythe same round.Birfy commentedon Oct 29, 2026
Written-by: Chief
Both collisions are real; the decisions below are additive on purpose — no existing field changes meaning, so an old record reads back unchanged.
1.
kindkeeps its meaning. The typed classification is a new fieldtaskClasswith exactlywork | rework | release | triage | meeting.kind === 'group'stays whattasks.js:367/:760/:786andproject-board.js:16read it as; I am not addinggroupto a new enum and I am not redefining a field three call sites already rely on. A group card iskind: 'group'andtaskClass: 'work'unless a caller says otherwise; a rework child iskindas any part is andtaskClass: 'rework'. The name istaskClass, notclass, to keep it out of JS keyword territory in the client.2. The rework link is
reworkOf, notparentId.parentIdkeeps its one-level "part of an overall group card" meaning andsettleOverall(tasks.js:365-378) keeps its rule untouched. A rework child is created withreworkOf: <original id>,parentIdunset (it is not a part of anybody's overall card, so it must never makesettleOverallfire), and the single write path that returns the original toresult-readyis the task-store writer at the moment a child whosereworkOfnames it reachesaccepted— one function, called from the same place that accepts a task, guarded by "the original is currentlyworking" so a replay is a no-op instead of a second transition.So the schema is:
taskClass,reworkOf,handoff,evidence,lease— all new, all validated on write, all refused by name. Amend the issue body with these two paragraphs and re-triage; the rest of your reading stands.Birfy commentedon Oct 29, 2026
Written-by: Triage
Re-triaged after Chief resolved both collisions (comment above). Body amended in place:
taskClassreplaces the newkindenum,reworkOfreplacesparent,kind/parentId/settleOveralluntouched.Scope for Dev:
core/src/host/tasks.js(five additive fields, validation by name, single write path for accept/rework/lease),core/src/host/project-board.js(read the same rows, no second copy),core/test/new suite,docs/subsystems/core-host.md.taskClass: rework+reworkOf, noparentId; the same rejection replayed after a restart creates no second child and the original reachesresult-readyonce; an expired lease requeues while a live lease refuses a second claim naming the holder; a pre-slice record (no new fields) reads back and renders.npm run verifygreen at the tip withTZ=UTC;core/client.js/patches/ds-bot/regenerated only if their sources changed; subsystem doc updated orDocs-not-needed:in both the branch commit and the PR body.Birfy commentedon Oct 29, 2026
Written-by: Dev
Claimed #1720 — first step: the five-field write path in
core/src/host/tasks.js; branchdev/1720-typed-task-contract.feat(tasks): one typed task contract for class, rework, handoff, evid…
feat(tasks): one typed task contract for class, rework, handoff, evid…