os-dev's three-class filing rule: a class-(b) finding names its seam — a Seam: line (producer → consumer, consumer: none allowed) on the card, and the half-state patrol reports a class-(b) card that lacks one (item ① of #18900)

Execution card for item ① of #18900 (the maintainer's 「同意」 on the five-line batch, 2026-09-18; proceeds under the veto window — a C on #18900 withdraws this card). Filed by the domain:skills execution seat (session_01BTeBejoPUvRHN8WdAJC6oF, seat post #7623) at 2026-09-18T04:58Z; filed with pm:queue, domain:* and priority are triage's (lane self-triage exception noted).

What lands

.claude/agents/os-dev.md 六条基本规则 3 (the three-class filing rule, :41–:49 band at 0b31d90): a class-(b) finding (违背已声明契约) carries one machine-readable line naming both ends of the seam — Seam: spec:<schema key or symbol> → runtime:<call site> | renderer:<component>, with consumer: none allowed when the filer measured no consumer. The dev already cites the contract text for (b); this makes the two ends a line a tool can read. Line budget: os-dev.md is 403 / 403 — net 0, amend the existing (b) line in place or pay by retirement.
scripts/pm/check-half-states.mjs: one report-only row — an OPEN card graded class (b) (a finding whose triage comment names 判据 (b), or a card whose body cites contract text under the (b) heading — the dev measures which signal is readable today) with no Seam: line at line start. ⛔ Never a half-state verdict by itself; ⛔ no change to the ownership markers or markerMatches.

Acceptance

A dev reading only os-dev.md knows to write the line and its shape; a filed (b) card without it appears on the patrol anchor by number.
Reader test in the PR body: 「I found a declared key the runtime never reads — what do I write?」 ⇒ the (b) line + Seam: with both ends.
Self-test floors hold or rise; check:pm-skill-ratchet, check:pm-skill-id-lint (⛔ no issue numbers in operative text), check:agent-model-declared, check:nul-bytes green.

Surface and serial

os-dev.md (governed rules layer, MANDATORY tier): behind the in-flight fold PR of [finding] os-dev.md tells a dev to hang labels the moment the PR opens, and twelve lines earlier reserves needs:contract-review to the seat — on a card where that is the only label owed, the literal reading hangs the clause-② gate on the dev's own PR #18699 / [finding] os-dev.md :285 asks for a ## 维护者速读(草稿) on every 受管面 PR body while :56 forbids the dev a body PATCH and the fact-layer dispatch says none is owed — on the references/** tier the section has no reader, and the definition and the dispatch order disagree on every such card #18812 / os-dev 的标准合同把「挂 PR 标签」写成 dev 自己的一笔，而 repo:cloud 的派发令明令禁止——两处文本对撞，靠 dev 每次自行裁断 #18821 → os-dev contract: the force-push twin defers to the LANDING repository's AGENTS.md §3 — objectui and cloud forbid absolutely, objectstack allows five-criteria --force-with-lease (objectui#9666 ruling C) #18882 → [finding] the os-dev dispatch contract and the harness attribution reminder contradict each other on the commit trailer — and landed history follows the reminder #18698's ① (once ruled) → this card.
check-half-states.mjs (non-governed): behind [finding] four open cards carry a real claim in a spelling the identity record's own contract does not permit — a ## Claim heading, Claiming the producer half, ## Claim + dispatch — so every marker-reading tool reads them as UNCLAIMED; the writers drifted off AGENTS.md :394–:395, not the reader #18831's PR (the near-miss forms).
skip-changeset; governed ⇒ draft at the four-piece terminal, the maintainer's approval lands it.

Dedupe words: Seam: line os-dev · class (b) finding seam · producer consumer line filing · half-state row missing Seam · declared≠enforced filing template.

Refs: #18900 · AGENTS.md PD#10 / #12 · ADR-0049 · .claude/agents/os-dev.md 六条基本规则 3 · scripts/pm/check-half-states.mjs

_{domain:skills execution seat · seat post #7623}

Blocked-by: #18900

_{分诊席 R+293 落此行(SKILL.md :112 / :137 的机器可 grep 反向索引)。#18900 现读仍是 needs-user-decision、0 条评论、板面上没有任何裁决;本卡自陈「proceeds under the veto window — a C on #18900 withdraws this card」⇒ 其前提是一次尚未落在板面上的裁决。⇒ #18900 被回一个字之时即本卡解锁之时。理由见 5725479658。⚠️ 本笔另把立卡席开头那个裸时戳声明为引用读数令牌 —— 该令牌逐字渲染,⇒ 存储字节与立卡席写下的完全相同,⛔ 未改其记录;不这样做,戳章契约会以 [positional] 拒绝任何一次正文写入(本卡因此一度只挂 pm:blocked 而正文缺行,由本笔补齐)。}

Generated by Claude Code

Blocked-by: #18900 is resolved: the maintainer's word on #18900 is now on the board — ruling batch #157 item 3, letter A′ (the five-line seam batch proceeds; item ①, this card, as filed). Director seat, summon #24, session_01Wj1HUjzyeiBQ8atRf1ZhaL · pm:blocked → pm:queue · 2026-09-18T08:07Z

Governed rules layer ⇒ draft PR, the approver lands it. A C on #18900 was the only thing that could withdraw this card, and it did not come.

Generated by Claude Code

Claim: PM loop round 1 (skills seat 2 at #19287 — R1, fable-first: maintainer direct dispatch; tier 2 of the mandate)
Session: session_017ETYWqMQD4qMtZzAGovWNi
Branch: claude/issue-18901-seam-line-filing-rule
Worktree: objectstack-issue-18901
Domain: domain:skills
Seat: domain:skills#2
File surface: .claude/agents/os-dev.md 六条基本规则 3, the three-class filing band only — the (b) line (:42 at cdedfb3: 「(a) 可复现缺陷(复现或失败探针具名);(b) 违背已声明契约(引契约原文);」) gains the Seam: line (producer → consumer, consumer: none allowed) IN PLACE or paid by a retired duplicate named in the PR body (net 0 on 403 / 403); ⛔ not :279 (PR #19305 lands there) and ⛔ not :284–:285 (#19202). scripts/pm/check-half-states.mjs region-level: ONE new report-only row (an OPEN card graded class (b) with no line-initial Seam:), its predicate, docblock and self-test cases beside a neighbouring row's cases (⛔ not at selfTest()'s tail; the SELF_TEST_BATTERY_FLOOR line bumps by one battery and the later lander resolves it); ⛔ no change to the ownership markers or markerMatches; ⛔ not the H26 region (:6875–:6909, #19255 in flight on this seat); ⛔ no workflow file.
Container & model: M in size, M in judgment, mode:subagent, CONTRACT_REVIEW_TIER — dispatch-gates --tier --repo objectstack-ai/objectstack .claude/agents/os-dev.md at cdedfb3: the dev-agent definition is MANDATORY (clause ①); a filing-rule change plus a new patrol row is a judgment, ⛔ not the one-line exit.
Clause-②: no
Thread-read: 5727134819
Ruling-ref: 5727134819 — director seat batch #157 item 3, letter A′ on #18900 (the five-line seam batch proceeds; item ①, this card, as filed), maintainer's 「同意」 2026-09-18; the card's 「What lands」 1–2 and its Acceptance are the spec; triage's handover 5725479658 (every governed text at its ceiling; the retired line named in the PR body) binds. Maintainer direct dispatch in this seat's session, verbatim: 「第二层——第一层落地后接着派」 (this card heads that list's check-half-states chain) then 「后续优先派需要fable 的任务」; ruling 甲 on #18891 (5727164406, region-level) applied — this claim declares its regions; its text change is PR #19317 (ACCEPTED, awaiting landing).
Serial constraints cleared: 1 of 36 open PRs touch .claude/agents/os-dev.md (PRs 19305 — :279 only, region-disjoint from the rule-3 band) and 0 touch scripts/pm/check-half-states.mjs (PRs ); every open PR's file list enumerated at 2026-09-20T11:05Z; positive control on the same enumeration: scripts/pm/dispatch-gates.mjs 3; git ls-remote --heads origin | grep issue-18901 → 0 heads; this seat's in-flight #19255 holds the H26 region of check-half-states.mjs (its branch is not yet a PR — the dev fetches claude/issue-19255-unlock-action-label-transition and reads its diff before placing the row); seat 1's #19230 is queued on this file (trim notice, another region); H17 index (anchor #9857 swept 2026-09-20T07:48Z): 0 rows name these files.

Net-line budget (a PM figure, ⛔ not the dev's to raise): net 0 in .claude/agents/os-dev.md; net ≤ +120 lines in scripts/pm/check-half-states.mjs. Label on the PR: skip-changeset.

Generated by Claude Code

os-dev-report

{
  "issue": 18901,
  "status": "done",
  "branch": "claude/issue-18901-seam-line-filing-rule",
  "pr": "https://github.com/objectstack-ai/objectstack/pull/19356",
  "session": "session_017ETYWqMQD4qMtZzAGovWNi",
  "premise_still_valid": true,
  "head": "5033c4d",
  "base": "origin/main 13d5294 (merged on resume; fast-forward, no own commits before it)",
  "files_changed": [
    ".claude/agents/os-dev.md",
    "scripts/pm/check-half-states.mjs"
  ],
  "net_lines": {
    ".claude/agents/os-dev.md": "0 (+2/-2; 403 / 403, ratchet: 「is 403 lines (ceiling 403; headroom 0)」)",
    "scripts/pm/check-half-states.mjs": "+120 (+124/-4; budget net ≤ +120)"
  },
  "summary": "os-dev.md 六条基本规则 3: the (b) line now reads 「(b) 违背已声明契约(引契约原文,带 `Seam:` 行)」 and ONE adjacent line carries the grammar — `Seam: spec:KEY → runtime:CALL_SITE | renderer:COMPONENT`, 「无消费者写 `consumer: none`」 (placeholders 键或符号 / 调用点 / 组件 in ASCII angle brackets in the file) — paid by retiring the MCP-write/token line (:53 at 13d5294), every clause of which survives elsewhere. check-half-states.mjs: H68, one report-only `state`-band row on the unscoped listing — an OPEN card that DECLARES class (b) in its body (a heading naming the class or a line opening with it, the shapes measured on the live board) and carries no `Seam:` line at line start (read with the `Blocked-by:` directive reader, same-line value required); battery beside H63's cases (26 / pin 24), SELF_TEST_BATTERY_FLOOR 6 → 7. Draft PR #19356 (Fixes #18901, Clause-②: no, 维护者速读(草稿), skip-changeset applied and read back). Governed Tier S — stays draft for the seat's contract-tier record.",
  "before_after": {
    "os-dev.md :42 before (97 B)": "   - (a) 可复现缺陷(复现或失败探针具名);(b) 违背已声明契约(引契约原文);",
    "os-dev.md :42 after (113 B)": "   - (a) 可复现缺陷(复现或失败探针具名);(b) 违背已声明契约(引契约原文,带 `Seam:` 行);",
    "os-dev.md :43 new (112 B)": "   - `Seam: spec:[键或符号] → runtime:[调用点] | renderer:[组件]`,无消费者写 `consumer: none`。 (square brackets here stand for the ASCII angle brackets in the file)"
  },
  "retired_line": {
    "line": "os-dev.md :53 at 13d5294 (115 B): 「   - ⛔ 不用 MCP GitHub 写工具;令牌按会话定:installation ⇒ `claude[bot]`,user-to-server ⇒ 用户。」",
    "surviving_homes": "ban: os-dev.md :51 「GitHub 写一律走 REST 代理(`curl` 带 `GITHUB_TOKEN`)」 (now :52), :307 「不走 MCP」, :308 「⛔ 不换路重发(curl/MCP/手工)」, report template :371 `mcp_calls` 「a write tool in the list = this report is refused」; token → login fact: .claude/skills/pm-dispatch/references/platform-readings.md:130 「容器 curl 的 REST 通道令牌两类:installation(`claude[bot]`)与 user-to-server(用户)」; the rule it served 「归属 = 文本里的 session ID,非 `user.login`」 stays on :51/:52. No gate pins its phrases (grep over scripts/, .claude/, .github/: only the line itself)."
  },
  "measured_signal": {
    "board_read": "2026-09-20T11:12Z, 537 open non-PR cards (6 pages)",
    "body_mentions_class_b_anywhere": 20,
    "body_declares_class_b_heading_or_line_start": "16 (one the pm:seat post #6015, never judged) ⇒ 15 listable",
    "body_mid_sentence_only": "4 — #19030, #18697, #17735, #18901 (this card, about the rule: the false positive a mention-reader lists)",
    "finding_cards": "20 (5 with domain:*, 6 with any comment); a comment naming the class on 0 of 20",
    "comment_also_names_class_on_body_hits": "8 of 20; comment-only cards: 0",
    "seam_line_at_line_start_on_board": "0 (6 cards mention `Seam:`, all about the rule)",
    "chosen_reader": "body declaration (heading naming the class, or a line opening with it); comment channel not read — dominated, and a request per candidate buys nothing",
    "row_lists_today": [
      19320,
      19307,
      19171,
      19160,
      19155,
      19146,
      19124,
      19120,
      19118,
      19043,
      18964,
      18957,
      18743,
      18277,
      18132
    ]
  },
  "specimens": {
    "listed": "#19160 (pm:queue · domain:skills · priority:p2) — 「## Class (b) — it violates a contract this repository publishes」, no `Seam:` line; the row quotes that heading",
    "not_listed": "the same #19160 body with `Seam: spec:… → runtime:…` appended (fixture: no live (b) card carries the line; #19085 is closed and carries neither signal); also #18901 itself (mid-sentence mention) and #6015 (pm:seat)"
  },
  "tests": "node scripts/pm/check-half-states.mjs --self-test :: exit 0 — 「✓ check-half-states self-test: 5107 cases pass. Batteries: H66 released queue card 183/172, H19 judged-set founding 37/34, H65 tier declaration spelling 46/42, H67 queued merged-delivery reading 152/142, H2/H47/H66 decorated ownership marker 213/184, ISSUE_BODY_LIMIT measured cap 55/52, H68 class-(b) seam line 26/24」. Live-board replay of the finished row over the saved listing: 15 listed (set above); #19160 listed; #19160 + Seam line NOT listed; #18901 NOT listed; #6015 NOT listed. pnpm check:pm-skill-ratchet :: exit 0 — 「.claude/agents/os-dev.md is 403 lines (ceiling 403; headroom 0)」. Gate union derived at 5033c4d by `node scripts/pm/dispatch-gates.mjs --commands --repo objectstack-ai/objectstack` (no paths): 47 commands, all exit 0, each exit captured by redirect-then-$? before any pipe; `--ran` reconciliation (separate call, `command :: exit N` form): 「47 derived famil(ies) accounted for — 47 run, 0 NOT-MEASURED (a DERIVED zero — all 47 recorded an exit code and none of them is 3)」. node scripts/pm/check-governed-merges.mjs --test .claude/agents/os-dev.md scripts/pm/check-half-states.mjs :: exit 3 = GOVERNED Tier S (.claude/** ×1), the expected reading. Build for check:doc-formula-expressions under os-verify-lock.sh (slot issue-18901): `pnpm --workspace-concurrency=2 --filter '@objectstack/lint...' build` → 「VERDICT command-exit 0 · held the lock 220s」; then `pnpm --filter @objectstack/lint run check:doc-formula-expressions` :: exit 0. Reverse verification / ablation: none run as a separate step — the row's failing direction is pinned inside the battery (the same body reads a string without the line and null with it, each decoration; the mid-sentence, pm:seat, closed and PR silences each beside a lit control).",
  "gates": [
    "node scripts/check-changeset-no-major.mjs --base origin/main :: exit 0",
    "node scripts/check-changeset-no-major.mjs --self-test :: exit 0",
    "node scripts/check-ci-filter-parity.mjs :: exit 0",
    "node scripts/check-closing-keyword-parity.mjs :: exit 0",
    "node scripts/check-closing-keyword-parity.mjs --self-test :: exit 0",
    "node scripts/check-comment-mask-corpus.mjs :: exit 0",
    "node scripts/check-declaration-mirrors.mjs :: exit 0",
    "node scripts/check-declaration-mirrors.mjs --self-test :: exit 0",
    "node scripts/check-scripts-symbol-anchors.mjs :: exit 0",
    "node scripts/check-scripts-symbol-anchors.mjs --self-test :: exit 0",
    "node scripts/check-self-test-wired.mjs :: exit 0",
    "node scripts/check-self-test-wired.mjs --self-test :: exit 0",
    "node scripts/check-self-test-workflow-commands.mjs :: exit 0",
    "node scripts/check-self-test-workflow-commands.mjs --self-test :: exit 0",
    "node scripts/check-whole-set-label-write.mjs :: exit 0",
    "node scripts/check-whole-set-label-write.mjs --self-test :: exit 0",
    "node scripts/pm/bare-root-worklist.mjs --self-test :: exit 0",
    "node scripts/pm/board-snapshot.mjs --self-test :: exit 0",
    "node scripts/pm/check-governed-queue-guard.mjs --self-test :: exit 0",
    "node scripts/pm/check-harness-current.mjs --self-test :: exit 0",
    "node scripts/pm/sweep-closed-cards.mjs --self-test :: exit 0",
    "pnpm --filter @objectstack/lint run check:doc-formula-expressions :: exit 0",
    "pnpm check:agent-model-declared :: exit 0",
    "pnpm check:agent-test-spelling :: exit 0",
    "pnpm check:bash32-floor :: exit 0",
    "pnpm check:changeset-gate-self-tests :: exit 0",
    "pnpm check:cli-command-ids :: exit 0",
    "pnpm check:closing-target-claim :: exit 0",
    "pnpm check:commit-card-trailers :: exit 0",
    "pnpm check:cross-package-test-inputs :: exit 0",
    "pnpm check:doc-authoring :: exit 0",
    "pnpm check:driver-memory-census :: exit 0",
    "pnpm check:entry-guard :: exit 0",
    "pnpm check:nul-bytes :: exit 0",
    "pnpm check:parse-guard :: exit 0",
    "pnpm check:partof-closing-keyword :: exit 0",
    "pnpm check:pm-dispatch-gates :: exit 0",
    "pnpm check:pm-governed-merges :: exit 0",
    "pnpm check:pm-half-states :: exit 0",
    "pnpm check:pm-skill-id-lint :: exit 0",
    "pnpm check:pm-skill-ratchet :: exit 0",
    "pnpm check:pnpm-filter-targets :: exit 0",
    "pnpm check:ratchet-remedy-authority :: exit 0",
    "pnpm check:refd-timer-probe :: exit 0",
    "pnpm check:single-claim-paths :: exit 0",
    "pnpm check:skill-frame-sync :: exit 0",
    "pnpm check:watch-hint-literal :: exit 0",
    "node scripts/pm/check-governed-merges.mjs --test .claude/agents/os-dev.md scripts/pm/check-half-states.mjs :: exit 3 (GOVERNED Tier S — expected)"
  ],
  "mcp_calls": "0 — no MCP GitHub tool was called",
  "api_writes": "5 events on the 4 budget lines — git push ×2 (empty-branch probe at cdedfb3, then 5033c4d); POST /repos/objectstack-ai/objectstack/pulls (draft #19356); POST /repos/objectstack-ai/objectstack/issues/19356/labels via scripts/pm/label-write.mjs (skip-changeset; read back MATCHES); POST /repos/objectstack-ai/objectstack/issues/18901/comments (this report). All writes Content-Type: application/json via curl + GITHUB_TOKEN.",
  "deviations": [
    "Run cut by the account's 5-hour usage wall (~11:35Z, HTTP 429), resumed 12:41Z; on resume merged origin/main (13d5294) — a fast-forward, no own commits existed — then re-measured os-dev.md at 403 / 403 (PR #19305's :279 landed on main; region-disjoint).",
    "First application of the H68 row measured +215 net on check-half-states.mjs (over the +120 budget); the file was restored from HEAD and the same row re-applied in compact form → +120 exactly. No commit carried the over-budget version.",
    "Gate batch B (24 commands in one foreground loop) passed the ~10-min foreground cap and was moved to the background by the harness on `pnpm check:pm-dispatch-gates` (a slow self-test, ~25 min, exit 0); its remaining 11 commands were re-run in the foreground (all exit 0) and the background loop later completed too (24 / 24 exit 0). Both readings recorded; no idle wait.",
    "Build under the lock, first attempt `pnpm --filter @objectstack/formula --filter @objectstack/lint build --concurrency=2` → VERDICT command-exit 1 (packages/spec dist absent in the fresh worktree; the trailing flag was forwarded into the package script — the toolchain trap); second attempt built lint's closure with --workspace-concurrency=2 before --filter → VERDICT command-exit 0.",
    "Stored PR body is 12419 B vs 12420 B sent: the platform dropped the trailing newline; every line identical, the session-URL footer survived verbatim, no second footer appended.",
    "SELF_TEST_BATTERY_FLOOR 6 → 7 and the three existing exact pins moved to 7 — #19255 (in flight, H26 region, @ cad8654) makes the same bump and adds its own roster row; the later lander resolves the roster merge and sets 8 (per the claim).",
    "`directiveValues`'s JSDoc `key` union was NOT widened with 'Seam' — that line is inside #19255's :1880 hunk; the reader is untyped at runtime and hasSeamLine works as-is.",
    "PM mechanism assumption 3 refined rather than followed literally: the graded-(b) population is not the `finding` + `domain:*` population (5 cards, 0 class comments) because `finding` is transient (「定级即离标」, H63); the measurement ran over the whole open board and both carriers were counted there."
  ],
  "open_questions": [],
  "out_of_scope_findings": [
    "noted, not filed: 3 live (b) cards declare the class only mid-sentence (#19030, #18697, #17735) and are deliberately not listed by H68 — 承接者: the seat that next grades or writes on each (a heading or line-start restatement puts them on the row)",
    "noted, not filed: `directiveValues` JSDoc key union lacks 'Seam' (line inside #19255's hunk) — 承接者: #19255's lander, one word",
    "noted, not filed: `pnpm check:pm-dispatch-gates` self-test runs ~25 min on this box (1885+ cases, git-spawning) — above the foreground cap on its own — 承接者: none (observation; not a defect class)"
  ]
}

Generated by Claude Code

ACCEPT — domain:skills#2 (session_017ETYWqMQD4qMtZzAGovWNi, seat post #19287) at 2026-09-20T14:21Z; PR #19356 (draft, head 5033c4d).

Checklist, verified on GitHub (⛔ not on the report's self-description):

Shape: draft · base main · first line Fixes #18901 · Clause-②: no line-initial · the only closing keyword in the body is that one · ## 维护者速读(草稿) present · labels skip-changeset + size/m + documentation.
Scope: 2 files, +126 / −6 — .claude/agents/os-dev.md net 0 (403 / 403; :42 113 B, :43 112 B; :53 retired with every clause's surviving home verified by the seat on this head) and scripts/pm/check-half-states.mjs +120 net (the ≤ +120 budget exactly); the H26 region ([finding] a pm:blocked card whose Blocked-by target is a needs-user-decision card can never be released — the unlock predicate is "closed", and Unlock-action recognizes exactly one PR-shaped spelling #19255), the ownership markers and every workflow file untouched. check-governed-merges --pr 19356: GOVERNED, Tier S.
Contract: ## Contract review PASS 5750369816 on the PR at this head (in-seat; served tier re-read at 2026-09-20T14:18Z = CONTRACT_REVIEW_TIER); --pair 19356 after the record: exit 0.
Tests, seat-run on the head in a detached worktree: --self-test exit 0 (5107 cases; battery 「H68 class-(b) seam line」 26 / 24 beside H63's); ratchet / id-lint / governed-prose exit 0; merge-tree vs origin/main c334ba0: 0 conflicts, neither file moved on main since merge-base 13d5294. The reader's firing direction is pinned inside the battery (the same body reads a finding without the line and null with it, each decoration; the mid-sentence, pm:seat, closed and PR silences each beside a lit control).
Gates: 47 derived families exit 0 with --ran reconciled (a DERIVED zero); CI on 5033c4d: 37 check runs, all green.
Report: mcp_calls 0 · api_writes 5 on the four budget lines. Deviations read (the usage-wall cut and resume, the +215 → +120 restore, the backgrounded gate batch re-run, the build flag trap, one dropped trailing newline) — all accepted. Three noted, not filed items carry named carriers.

Landing: Tier S ⇒ in-seat ready + auto-merge. HELD for one check-in: PR #19351 (this seat's other Tier S landing, same roster line) was converted back to draft at 2026-09-20T14:16Z by an act under the shared identity that is not this seat's and carries no comment — read as the maintainer's until said otherwise, so this PR is not flipped in the same window. If #19351 is still draft with no word at the 14:45Z check-in, this PR stays draft too and the seat asks once; pm:dispatched comes off at MERGED (the Fixes line closes this card).

Generated by Claude Code

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os-dev's three-class filing rule: a class-(b) finding names its seam — a `Seam:` line (producer → consumer, `consumer: none` allowed) on the card, and the half-state patrol reports a class-(b) card that lacks one (item ① of #18900) #18901

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os-dev's three-class filing rule: a class-(b) finding names its seam — a Seam: line (producer → consumer, consumer: none allowed) on the card, and the half-state patrol reports a class-(b) card that lacks one (item ① of #18900) #18901

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hotlong commented on Sep 18, 2026

os-steve commented on Sep 20, 2026

os-steve commented on Sep 20, 2026

os-steve commented on Sep 20, 2026

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os-dev's three-class filing rule: a class-(b) finding names its seam — a `Seam:` line (producer → consumer, `consumer: none` allowed) on the card, and the half-state patrol reports a class-(b) card that lacks one (item ① of #18900) #18901