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…ll portability) Otto-268 backfill task: drain-log for PR #432 covering 7 substantive shell-portability findings — including a P0 regression (`warn` unbound under `set -u`) caught independently by both Codex and Copilot. Per Otto-250 training-signal discipline. Pattern observations capture four load-bearing patterns: cross-reviewer convergence as a quality signal; `set -euo pipefail` interaction with shell quirks as a recurring class (3 of 7 findings); ERE-metachar escape uniformity across label arrays; grep -n line-number prefix breaking `^` anchors in subsequent greps as a reusable pattern.
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Pull request overview
Adds a PR-preservation drain log for PR #432, capturing the resolved review threads and outcomes around shell portability fixes in tools/lint/runner-version-freshness.sh.
Changes:
- Introduces a new drain-log document recording 7 resolved review threads (findings, severities, outcomes, commits).
- Summarizes recurring shell-portability patterns observed during the drain (e.g.,
set -u/pipefailinteractions,grep -nprefix effects).
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Summary
Otto-268 backfill: drain-log for PR #432 (drain follow-up for #360 —
tools/lint/runner-version-freshness.shshell portability + allow-list scope), covering 7 substantive shell-portability findings including a P0 regression.Per Otto-250 (PR review comments + responses + resolutions are high-quality training signals).
Coverage — all FIX outcomes
warnunbound underset -u— fixed via explicitwarn=0initialization.cd "$REPO_ROOT"before consuming$@— fixed via absolute-path normalization before chdir.cmd1 | sed ... || truemasking sed failures — fixed via{ grep -vE ... || true; } | sedgrouping.escape_for_regextreatment — fixed via uniform escape loop.runs-on:workflows — fixed via line-number-aware(^|^[0-9]+:)exclude prefix.Pattern observations
set -euo pipefailinteractions with shell quirks are a recurring class — 3 of 7 findings.grep -nline-number prefix breaking^anchors in subsequent greps is a reusable pattern worth capturing.Test plan
docs/pr-preservation/*-drain-log.mdtemplate.🤖 Generated with Claude Code