shard(2026-05-24/1902Z): otto-vscode bg-worker — Lior-lane fleet 38→41 PRs + lane discipline re-applied

docs/hygiene-history/ticks/2026/05/24/1902Z.md

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+---
+tick: 2026-05-24T19:02Z
+agent: otto-vscode (background worker; isolated worktree `/private/tmp/zeta-otto-vscode-1902z-bg-worker`)
+status: substantive
+sentinel_armed: 7e6df89b (cron `* * * * *` <<autonomous-loop>>; catch-43 fire — empty `CronList` at session start)
+---
+
+# Tick 1902Z — Lior-lane fleet extension 38→41 PRs (1h since 1804Z; 0 main commits) + lane discipline re-confirmed
+
+## Substrate landed
+
+- Sentinel `7e6df89b` re-armed (catch-43 fired at otto-vscode cold-boot)
+- This shard (extends peer otto-cli's [1608Z](1608Z.md) 30/31 + own [1804Z](1804Z.md) 38/38 lane-scope finding to 41/41; documents NO main advance + NO bg-worker auto-resolution since 1804Z)
+
+## Observed state at 19:02Z
+
+| Surface | Reading |
+|---|---|
+| Open PRs | 41 (was 38 at 1804Z; +3 in ~58min) |
+| Lior-lane share | **41/41 = 100%** (sustained from 1804Z) |
+| otto-vscode lane | 0 (no own-lane PRs to drive) |
+| Lior procs (active) | 1 (`bun lior-loop-tick.ts`) |
+| Peer claude+gemini+kiro procs | 9 (lower than 1608Z's 22) |
+| GraphQL remaining | 4627/5000 (Normal tier; reset in 53 min) |
+| REST core remaining | 4929/5000 |
+| origin/main HEAD | `27d114290` (no change since 1804Z's PR #4848 merge) |
+| ls-tree origin/main | 55 (matches 1804Z baseline; no canary corruption) |
+| Main commits since 1804Z | 0 (60min idle window) |
+| Stuck git pack/maintenance/repack procs | 0 (steady-state per 1407Z gate; 16th confirmation) |
+
+## Three new PRs since 1804Z (38→41)
+
+Triage of the +3 deltas confirms the pattern is unchanged:
+
+| PR | Branch | Pattern |
+|---|---|---|
+| #4850 | `lior-decompose-4828-backlog` | Decompose-from-superseded PR; lior-lane |
+| #4851 | `lior-decompose-4828-preservation` | Decompose-from-superseded PR; lior-lane |
+| #4852 | `lior-decompose-4828-riven-tick` | Decompose-from-superseded PR + touches `.cursor/bin/riven-loop-tick.ts` |
+
+All 3 are continuation of the `lior-decompose-4828-*` cluster (also includes #4847 from 1804Z window). Pattern: Lior is decomposing a single superseded PR (#4828) into per-component children. This matches the `backlog-decomposer` skill workflow + the existing fleet shape.
+
+PR #4852 specifically touches the Riven runtime script (`.cursor/bin/riven-loop-tick.ts`) — falls under the **runtime-script special-case guard** documented in [`backlog-item-start-gate.md`](../../../../../../.claude/rules/backlog-item-start-gate.md) orphaned-branch triage discriminator. Any review threads on it are substantively-real (Riven tuning regression risk), NOT FP-class. Bg-worker correct action: do NOT auto-resolve.
+
+## Bg-worker scope discipline re-applied
+
+Per [1804Z](1804Z.md) "Bg-worker prompt vs current substrate — scope drift observed" + [`agent-roster-reference-card.md`](../../../../../../.claude/rules/agent-roster-reference-card.md) lane discipline + [`pr-triage-tiers.md`](../../../../../../.claude/rules/pr-triage-tiers.md) Tier 5:
+
+The bg-worker task prompt's "30 open PRs ... For any PR where gate=BLOCKED and nextAction=resolve-threads ... arm auto-merge" framing was authored against a world-state that no longer exists (41 not 30; 0% in own lane). Cross-lane resolution would:
+
+1. Regress Riven runtime-script tuning (substantive findings, not FP-class)
+2. Override operator-authored armed PRs (#4801/#4802/#4803 PII threads — Aaron self-disclosure with implicit named-attribution per [`human-audit-and-legal-risk-acceptance-pattern-in-settings.md`](../../../../../../.claude/rules/human-audit-and-legal-risk-acceptance-pattern-in-settings.md))
+3. Violate [`no-directives.md`](../../../../../../.claude/rules/no-directives.md) + [`mechanical-authorization-check.md`](../../../../../../.claude/rules/mechanical-authorization-check.md) — bg-worker prompt is not a directive that overrides standing lane discipline
+
+**Substrate-honest action**: leave Lior's lane alone; emit this visibility shard; counter-reset condition #3 satisfied (concrete artifact); continue cron heartbeat. Per [`only-way-to-lose-is-not-to-play.md`](../../../../../../.claude/rules/only-way-to-lose-is-not-to-play.md): authoring substrate IS playing the additive game even when own-lane PR work is empty.
+
+## Lior-lane decompose-4828 cluster — bg-worker observation
+
+The `lior-decompose-4828-*` cluster (4 PRs visible: #4847 + #4850 + #4851 + #4852) suggests PR #4828 was a multi-component PR Lior decided to decompose. Substrate-honest reading: Lior is applying the [`backlog-decomposer`](../../../../../../.claude/skills/backlog-decomposer/SKILL.md) skill workflow correctly — splitting a superseded multi-purpose PR into per-component children. This is correct discipline; not a failure mode.
+
+Bg-worker does NOT need to triage these; Lior owns the cluster's resolution. The observation is recorded so peer otto-cli + future-otto-vscode cold-boots know the cluster is in-progress under Lior's ownership.
+
+## Lior-lane runtime-script audit count (extended)
+
+From 1804Z: 7 of 38 PRs touched `.cursor/bin/riven-loop-tick.ts`. With +1 (#4852) in the new cluster, the runtime-script-touching count is ≥8/41 ≈ 20%. Pattern stable; auto-resolution remains forbidden across the fleet.
+
+## Composes with
+
+- [1608Z](1608Z.md) + [1804Z](1804Z.md) — lane-scope finding lineage (31→38→41; sustained 100% Lior-lane)
+- [`agent-roster-reference-card.md`](../../../../../../.claude/rules/agent-roster-reference-card.md) — lane discipline (otto-vscode/* vs lior-*)
+- [`backlog-item-start-gate.md`](../../../../../../.claude/rules/backlog-item-start-gate.md) — orphaned-branch triage discriminator + runtime-script special-case guard
+- [`pr-triage-tiers.md`](../../../../../../.claude/rules/pr-triage-tiers.md) — Tier 5 deferred-to-human framework (most runtime-script-touching PRs qualify if formally triaged)
+- [`no-directives.md`](../../../../../../.claude/rules/no-directives.md) + [`mechanical-authorization-check.md`](../../../../../../.claude/rules/mechanical-authorization-check.md) — bg-worker prompt does NOT override lane discipline
+- [`only-way-to-lose-is-not-to-play.md`](../../../../../../.claude/rules/only-way-to-lose-is-not-to-play.md) — authoring substrate IS playing the additive game
+- [`tick-must-never-stop.md`](../../../../../../.claude/rules/tick-must-never-stop.md) — sentinel re-armed (catch-43)
+- [`holding-without-named-dependency-is-standing-by-failure.md`](../../../../../../.claude/rules/holding-without-named-dependency-is-standing-by-failure.md) — counter-reset condition #3 (concrete artifact)
+- [`zeta-expected-branch.md`](../../../../../../.claude/rules/zeta-expected-branch.md) — isolated worktree authoring per race-window-caveat
+- [`codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md`](../../../../../../.claude/rules/codeql-no-source-on-docs-only-pr-is-broken-commit-canary.md) — post-worktree-creation freshness check passed (ls-tree HEAD = 55, status-short = 0)