pm-dispatch(mailbox): epic seats cannot be rung — mailbox-open refuses epic: seat keys and the fleet roster has no epic rows

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

Carries item ③ of #28675 (epic seats get mailboxes); #28675 keeps items ①②④⑤, landing in PR #28716.
Filing gate: ② an in-scope item of in-flight work #28675 that its PR could not carry within the claim's file surface (dev report 6559765410, open_questions 1). Filed by domain:skills seat 2. ⛔ Not a claim.
Reader: domain:skills, scripts/pm/mailbox-open.mjs (seatKey), scripts/pm/fleet-roster.mjs (seat rows), plus one line in .claude/skills/pm-dispatch/references/project-forms.md 〈信箱 PR〉.
Dedupe (open AND closed): "epic mailbox" → only #28675; "epic seat roster" → none.
reach: every epic PM seat. Measured on 2026-11-01 (#28675 body): epic:#27293#1, epic:#28130#1 and epic:#26676#1 dispatch every pm:epic card, but have no roster row and no mailbox, so no seat can ring them; triage's "take #28591 first" sat on the card instead.

Measured by the #28675 dev

mailbox-open.mjs seatKey refuses an epic: seat spelling, so an epic seat cannot open a mailbox.
fleet-roster.mjs lists no epic seats, so the roster's mailbox column cannot show one.

Wanted

mailbox-open.mjs --seat 'epic:#N#K' opens a mailbox (branch slug and Mailbox-of: line follow the lane rules).
The roster reads epic seats: either a row per open pm:epic parent that names a session, or a Mailbox: line on the epic card body that the roster reads.
One rules line in 〈信箱 PR〉 says an epic seat opens a mailbox like any seat (after pm-dispatch(mailbox): name when a seat MUST ring another — unblocked card, main-red anchor, release blocker, a question for triage, serial order, a relayed ruling — and close the seats with no mailbox #28675's table lands, which this card builds on).

Blocked-by: #28675

triage#1 · os-zhuang · session_01AavokzJ5DndAwitDXvKy4U

Path: none

Triage: p2 · `domain:skills` · `area:devpath` · `pm:blocked` (behind #28675) · 2026-11-01T15:56Z

⛔ Not a claim.

Read fresh. This is item ③ of pm-dispatch(mailbox): name when a seat MUST ring another — unblocked card, main-red anchor, release blocker, a question for triage, serial order, a relayed ruling — and close the seats with no mailbox #28675 split out: epic seats cannot open a mailbox, because mailbox-open.mjs's seatKey refuses epic: spellings, and the roster has no epic rows. epic:#27293#1 measured this itself in its reply on [Epic] Marketplace and connector auto-shelf — E1 platform prerequisites (openapi/mcp hardening, outbound OAuth, request signing), E2 administrator credential hand-off, E3 author recipes and handbook, E4 the first shelf of official connector apps #27293. p2, in step with pm-dispatch(mailbox): name when a seat MUST ring another — unblocked card, main-red anchor, release blocker, a question for triage, serial order, a relayed ruling — and close the seats with no mailbox #28675.
Blocked-by: #28675 stands. PR docs(pm-dispatch): a scene table of when a seat must ring another seat's mailbox, the missing keys admitted, the mailbox as a seating step #28716 lands the scenario table this card builds on, so pm:blocked it is.
One-PR cross-domain exception, exact files: scripts/pm/mailbox-open.mjs, scripts/pm/fleet-roster.mjs and their self-tests (the domain:devx surface), plus the one project-forms.md line. Tier H for the skill line.

Generated by Claude Code

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

State: `pm:blocked` → `pm:queue` · 2026-11-01T16:34Z

Blocker landed: Blocked-by: #28675 is closed completed by PR #28716 (merged db357f6da9). Triage audit on file (6560301001), so the card is a candidate again. finding removed in the same write (graded p2 by triage). ⛔ Not a claim.

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

Claim: PM loop round 1
Session: session_017ihL2g7RyXa8ErM6GAkHyc
Account: marchtian
Branch: claude/issue-28718-epic-seat-mailbox
Worktree: objectstack-issue-28718
Domain: domain:skills
Seat: domain:skills#2
File surface: scripts/pm/mailbox-open.mjs, scripts/pm/fleet-roster.mjs (+ scripts/pm/fleet-roster.fixture.json if its battery needs an epic row) and their self-tests, plus one line of .claude/skills/pm-dispatch/references/project-forms.md 〈信箱 PR〉 — triage's one-PR cross-domain exception (6560301001). record-recognisers.mjs only if To: epic:… must read (then named in the report).
Container & model: M, mode:subagent, model: opus (dispatch-gates --tier: no path-derived mandate on this surface; PM per-card judgment), effort: high
Clause-②: no
Metadata-protocol: none
Responsibility: n/a — not a defect card (a protocol gap split from #28675)
Thread-read: 6560747188
Premise: holds — on origin/main after PR #28716, mailbox-open.mjs seatKey('epic:#12') still returns null (its self-test pins it) and fleet-roster.mjs names no epic seat.
Serial constraints cleared: PR #28716 (#28675, the blocker) merged db357f6da9; no open PR touches the surface above (read over every open non-mailbox PR); PR #28739 touches only SKILL.md.

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

os-dev-report

{
  "issue": 28718,
  "status": "done",
  "branch": "claude/issue-28718-epic-seat-mailbox",
  "pr": "https://github.com/objectstack-ai/objectstack/pull/28751",
  "head": "27657d802c",
  "session": "session_017ihL2g7RyXa8ErM6GAkHyc",
  "premise_still_valid": true,
  "summary": "seatKey (mailbox-open.mjs) reads the epic lane epic:#N#K (epic:#N = seat 1; slug epic-N-K; domain:epic-... joins the reserved set so slugs stay one-to-one; malformed epic spellings stay refused), so mailbox-open opens an epic seat's mailbox and To: epic:#N#K doorbells read through record-recognisers unchanged. fleet-roster gives each open delegated pm:epic parent (sub-issues AND a session registration, both halves of H45's signals) a row: one per epic seat with an open mailbox (seated by its Mailbox-of login), else seat 1 status unknown; an epic mailbox is no longer flagged as on no seat row. project-forms 〈信箱 PR〉 first line now says an epic seat opens one like any seat, paid in place by dropping the tool-owned branch spelling (54/54 ceiling unchanged).",
  "roster_option": "(a) row per open pm:epic parent naming a session: one new read per repo (GET issues?labels=pm:epic) and no new protocol; (b) needs the same read plus a new Mailbox: line on epic bodies; rows off mailboxes alone (zero reads) rejected because a closed epic's mailbox would read as a live seat",
  "tests": "node scripts/pm/mailbox-open.mjs --self-test: 81 cases in 10 batteries pass (exit 0); node scripts/pm/fleet-roster.mjs --self-test: 88 cases in 8 batteries pass (exit 0); importers green unchanged: record-recognisers --self-test 351 cases, check-owed-reviews --self-test 65, fleet-write/dispatch --self-test 265; live read-only roster on objectstack: 30 rows incl. epic:#26676, epic:#27293, epic:#8345 (seat 1, unknown, no epic mailbox open yet); ablation n/a (scripts are not ablated per os-dev)",
  "gates": "head 27657d802c: dispatch-gates --commands --repo objectstack-ai/objectstack derived 38 families, all exit 0 (captured before any pipe); --ran: 38 derived, 38 run, 0 NOT-MEASURED, 0 UNRUN (exit 0). Named by the order: check:pm-skill-ratchet 0 (project-forms.md 54/54), check:pm-skill-id-lint 0, check:skill-frame-sync 0, check:pm-governed-prose 0 (outside derivation), both --self-test 0. check:pm-dispatch-gates: fast tier 1937 cases pass, exit 0. CI check-runs on 27657d802c at report time: 6 success, 20 skipped, 15 in_progress, 0 failure (not waited for).",
  "line_budget": "roster half +62/-14 = net +48 (fleet-roster.mjs +52/-14, fleet-roster.fixture.json +10/-0), under the ~120 cap; mailbox-open.mjs +46/-28 = net +18; project-forms.md +1/-1 = net 0; total +109/-43 over 4 files",
  "deviations": [
    "first gate pass ran before pnpm install: 9 families exit 3 (no node_modules / @objectstack/formula and @objectstack/lint unbuilt) and check-self-test-workflow-commands exit 1 (release-pending-publish could not import @changesets/cli); after pnpm install --frozen-lockfile and turbo build of formula+lint under os-verify-lock (VERDICT command-exit 0) all re-ran to exit 0",
    "first check:pm-dispatch-gates run was backgrounded without an exit capture; re-run with the exit captured (0) and that reading is the one recorded",
    "the 〈信箱 PR〉 rule is one EDITED line, not an added one: the file is at ceiling 54 (headroom 0) and all lines are near the 120-byte cap, so the epic clause is paid by deleting the branch spelling from the same line (tool-owned, mailbox-open.mjs header)",
    "PR body ends with the order's footer line; the session URL sits in body prose (Session: line) rather than as AGENTS' session-URL footer",
    "PR opened with no assignees (order + os-dev), although AGENTS says the PR assignee mirrors the card's"
  ],
  "files_changed": [
    ".claude/skills/pm-dispatch/references/project-forms.md",
    "scripts/pm/fleet-roster.fixture.json",
    "scripts/pm/fleet-roster.mjs",
    "scripts/pm/mailbox-open.mjs"
  ],
  "record_recognisers": "not edited: To: and key seat fields read through seatKey, so To: epic:#27293#1 reads (measured)",
  "dogfood_battery": "n/a — no ! in the PR title and no (narrowing) arm",
  "mcp_calls": "0",
  "api_writes": "2 — POST /repos/objectstack-ai/objectstack/dispatches (relay pr_create stroke: pull #28751 created draft + labels leg skip-changeset, read back 8272/8272 bytes), POST issues/28718/comments via post-stamped (this report); plus 1 git push (not REST)",
  "out_of_scope_findings": [
    "carrier: none · noted, not filed — record-recognisers.mjs readSeat docblock still names four lanes in prose; behaviour already follows seatKey (outside the file surface)"
  ],
  "open_questions": [
    {
      "question": "Epic parent bodies state seated/vacant only in free prose (#8345 says vacant), so an epic row with no mailbox reads 'unknown'. Add a uniform seat line to epic parents?",
      "options": [
        "A keep: the open mailbox is the seated signal; unknown means nobody can ring it",
        "B add a machine line to the epic registration (new protocol, more reads of prose)"
      ],
      "recommendation": "A, because it adds no protocol and the gap the card names (unringable) is exactly what unknown shows"
    },
    {
      "question": "Triage named the skill line Tier H; GOVERNED_SURFACES registers .claude/** as Tier S. Which record lands this PR?",
      "options": [
        "A Tier S: a contract-review PASS on the current head, owning seat lands",
        "B Tier H: maintainer approval"
      ],
      "recommendation": "A, because the register is the authority and every path here is .claude/** or scripts/pm/**"
    }
  ]
}

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

os-dev-report

{
  "issue": 28718,
  "status": "done",
  "round": "patch — contract review 6561348241 should-fixes 1-3",
  "pr": "https://github.com/objectstack-ai/objectstack/pull/28751",
  "head": "ed0cc244e46a68611333a6d2b1e0e36bcd3d7a5f",
  "session": "session_017ihL2g7RyXa8ErM6GAkHyc",
  "changes": [
    "1: project-forms.md 〈信箱 PR〉 line spells the seat as epic:#N#K with both numbers bracketed as placeholders (117 bytes; 54/54)",
    "2: fleet-roster epicSeatsHeld matches an epic row's seats by seatKey's slug epic-N-K, as the mailbox column does, so a head-only epic mailbox seats its row (seat number from the slug); fixture 25400 on 27293 seat 2",
    "3: isSeatedFreshEpic, a second named condition: a registered pm:epic issue that an open mailbox names is a row with no sub-issue yet; isEpicParent stays equal to H45; fixture 28800 + mailbox 25399 is a seated row and not flagged, 28647 (registration, total 0, no mailbox) stays no row"
  ],
  "tests": "fleet-roster --self-test: 91 cases in 8 batteries pass (fixture battery pin 22 to 25); mailbox-open --self-test: 81 cases in 10 batteries pass",
  "gates": "head ed0cc244e4: dispatch-gates --commands --repo objectstack-ai/objectstack derived the same 38 families, all exit 0 captured before any pipe; --ran: 38 derived, 38 run, 0 NOT-MEASURED, 0 UNRUN (exit 0). check:pm-skill-ratchet 0, check:pm-skill-id-lint 0, check:skill-frame-sync 0, check:pm-governed-prose 0, check:pm-dispatch-gates 0 (fast tier 1937 cases)",
  "line_budget": "this round +49/-17 (fleet-roster.mjs +45/-16, fixture +3/-0, project-forms.md +1/-1); roster half now +94/-14 = net +80 vs main, under the ~120 cap; whole PR +141/-43 over the same 4 files",
  "files_changed": [
    ".claude/skills/pm-dispatch/references/project-forms.md",
    "scripts/pm/fleet-roster.fixture.json",
    "scripts/pm/fleet-roster.mjs"
  ],
  "deviations": [],
  "mcp_calls": "0",
  "api_writes": "1 — POST issues/28718/comments via post-stamped (this report); plus 1 git push (not REST)",
  "out_of_scope_findings": [],
  "open_questions": []
}

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

ACCEPT → PR #28751 comment 6561565905 (head ed0cc244e46a68611333a6d2b1e0e36bcd3d7a5f; contract review PASS 6561348241 → patch round 6561503444 → delta PASS 6561551606). The PR is a draft with needs-user-decision, and os-zhuang and hotlong are requested as reviewers. It waits on an authorised approver.

domain:skills#2 · marchtian · session_017ihL2g7RyXa8ErM6GAkHyc

Landed 2026-11-01T21:06Z: PR #28751 merged as b9b877ccb0 (merge queue; readied and enqueued by os-zhuang). Contract review PASS 6561551606, seat ACCEPT 6561565905.

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pm-dispatch(mailbox): epic seats cannot be rung — mailbox-open refuses `epic:` seat keys and the fleet roster has no epic rows #28718

Measured by the #28675 dev

Wanted

Triage: p2 · `domain:skills` · `area:devpath` · `pm:blocked` (behind #28675) · 2026-11-01T15:56Z

State: `pm:blocked` → `pm:queue` · 2026-11-01T16:34Z

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pm-dispatch(mailbox): epic seats cannot be rung — mailbox-open refuses epic: seat keys and the fleet roster has no epic rows #28718

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Measured by the #28675 dev

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objectstack-fleet commented on Nov 1, 2026

Triage: p2 · domain:skills · area:devpath · pm:blocked (behind #28675) · 2026-11-01T15:56Z

objectstack-fleet commented on Nov 1, 2026

State: pm:blocked → pm:queue · 2026-11-01T16:34Z

objectstack-fleet commented on Nov 1, 2026

objectstack-fleet commented on Nov 1, 2026

objectstack-fleet commented on Nov 1, 2026

objectstack-fleet commented on Nov 1, 2026

objectstack-fleet commented on Nov 1, 2026

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pm-dispatch(mailbox): epic seats cannot be rung — mailbox-open refuses `epic:` seat keys and the fleet roster has no epic rows #28718

Triage: p2 · `domain:skills` · `area:devpath` · `pm:blocked` (behind #28675) · 2026-11-01T15:56Z

State: `pm:blocked` → `pm:queue` · 2026-11-01T16:34Z