chore(b-0441): decompose into atomic child rows B-0500/B-0501/B-0502/B-0460

[AceHack]

Summary

B-0441 (backlog-ready-notifier background service) had slices 1+2+4 already shipped in tools/bg/backlog-ready-notifier.ts. The remaining implementation work was sketched as a TBD list in the parent row. This PR formalises that work into four dependency-ordered atomic child rows.

Child rows created:

Row	Slice	What	Effort	Deps
B-0500	3	Wire isAgentQueueEmpty guard into pollOnce (currently publishes unconditionally; function exists but is not called from the poll loop)	XS	none
B-0501	5a	Assignment history dedup / cooldown (avoid re-publishing same row within configurable window)	S	none
B-0502	6	launchd plist + docs/AUTONOMOUS-LOOP.md update (same pattern as com.zeta.missed-substrate-detector.plist)	XS	none
B-0460	5.2	Agent-side work-assignment subscriber handler — explicitly referenced in B-0449 as "B-0460" but the file never existed	S	B-0449

Parent row updated:

• children: field added to frontmatter
• TBD decomposition hint replaced with formal slice-status table
• Pre-start checklist items ticked (prior-art search, dependency check, decomposition done)

Focused checks

bun test tools/bg/backlog-ready-notifier.test.ts
# 35 pass, 0 fail (existing tests; no new code changed)

bun tools/bg/audit-duplicate-row-ids.ts --once
# 599 rows with id field, no duplicate IDs

Notes

• B-0500, B-0501, B-0502 are independent of each other and can land in any order
• B-0460 depends on B-0449 (subscriber library design pass) — blocked until B-0449 merges
• The isAgentQueueEmpty function is already fully implemented and tested; B-0500 is a wiring-only change (~30 lines implementation + ~40 lines tests)
• B-0502 uses StartInterval: 600 (10 min) to match DEFAULT_CONFIG.pollIntervalMin, distinguishing it from the standing-by-detector (300s) and missed-substrate-detector (300s)

operative-authorization: aaron 2026-05-13: "Cooling period: TBD. The memory file IS the durable record"

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Decomposes parent backlog row B-0441 (backlog-ready-notifier background service) into four atomic child rows so the remaining slices (3, 5a, 5.2, 6) can be picked up independently. No code changes — this PR adds planning documents and updates the parent row's frontmatter and slice table.

Changes:

• Creates four new P1 backlog rows: B-0500 (queue-state guard wiring), B-0501 (assignment-history cooldown), B-0502 (launchd plist + docs), B-0460 (work-assignment subscriber handler, depends on B-0449).
• Updates parent B-0441: adds children: frontmatter, bumps last_updated, replaces TBD slice list with a concrete slice-status table, and checks off pre-start checklist items.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/backlog/P1/B-0500-…2026-05-14.md	New row: wire existing isAgentQueueEmpty into pollOnce; adds targetAgent config + queueBusy PollResult field.
docs/backlog/P1/B-0501-…2026-05-14.md	New row: assignment-history dedup with cooldown window, atomic file write, adapter injection.
docs/backlog/P1/B-0502-…2026-05-14.md	New row: launchd plist + AUTONOMOUS-LOOP.md/README updates; StartInterval: 600 matching default poll interval.
docs/backlog/P1/B-0460-…2026-05-14.md	New row: agent-side subscriber handler for work-assignment topic; depends on B-0449.
docs/backlog/P1/B-0441-…2026-05-13.md	Parent updated with children:, completed checklist, formalized slice-status table.