wr-itil: work-problems Step 5 duration_ms can dramatically undercount (extend P089 Gap 2 authority hierarchy beyond usage.*)

[tompahoward]

Description

/wr-itil:work-problems Step 5 subprocess JSON envelope's duration_ms (not just usage.* tokens) can dramatically undercount when the subprocess exits via a background-task completion ack. Extend the P089 Gap 2 authority-hierarchy caveat to name duration_ms alongside usage.*.

Symptoms

• An iter's claude -p --output-format json envelope reports e.g. duration_ms: 13445 (13.4s) with num_turns: 1, stop_reason: end_turn, while the orchestrator's Bash wall-clock timer shows ~2105s (~35 min).
• Total cost stays authoritative; only wall-time/duration undercounts.

Workaround

Measure wall-time from the Bash wrapper's own timer (already documented as the SIGTERM-decision signal); treat duration_ms as best-effort under the same exit-mode caveat as usage.*.

Affected plugin / component

@windyroad/itil — work-problems SKILL.md Step 5 "Authority hierarchy (P089 Gap 2)" paragraph.

Frequency

Per iter that exits via a background-task completion ack.

Versions

• Local plugin: @windyroad/itil (not detected — marketplace install)
• Upstream package: @windyroad/itil (not detected)
• Claude Code CLI: 2.1.219
• Node: v24.16.0
• OS: Darwin 25.3.0 arm64

Evidence

Fix shape: extend the Authority hierarchy paragraph to name duration_ms alongside usage.* as best-effort. Cost remains authoritative; wall-time is measured from the Bash wrapper's own timer.

Cross-reference

Reported from https://github.com/voder-ai/dry-aged-deps — tracked locally as problem ticket P019 in docs/problems/.