repo-sweep: a step whose skill covered only part of the repo is recorded as "no findings"

[kyle-sexton]

Summary

playbooks:repo-sweep 0.13.0 records a step as no findings whenever the step changed no file
outside .work/ (reference/next.md section 4, item 3). It never checks what the step's skill
actually covered. In the melodic-software/.github hygiene sweep (PR #153), the dead-code step
ran code-tidying:audit-dead-code. That scan covered 3 of the repo's 5 source files: the 2
standalone .mjs files fell under no lane (#4521). The checklist still reads
- [x] dead-code: code-tidying:audit-dead-code@0.23.2, no findings, which a later sweep's
history.sh reads as evidence the step ran clean.

Fix

• Split the outcome in tick.sh and the checklist format: no findings only when the skill
  reports full coverage; no findings, partial coverage: <what was not covered> otherwise.
• In next.md section 3, before ticking, have the step read the skill's own coverage statement,
  for example audit-dead-code's Lane: lines and Summary coverage: once audit-dead-code: account for every source file; a report is clean only when none is uncovered #4521 ships. Show any
  uncovered scope to the user alongside the findings.
• Have history.sh treat a partial-coverage tick as rerun, not as a clean prior run.

Verification

• Done when a step whose skill reports uncovered files ticks with the partial-coverage form, and
  the next plan recommends rerun for it.

Related

• audit-dead-code: account for every source file; a report is clean only when none is uncovered #4521: the audit-dead-code side of the same gap. Sibling issues from the same audit: audit-dead-code: detect dead code in JS/TS outside a package.json root #4522,
  audit-dead-code: detect unreferenced files in any language #4523, audit-dead-code: when coverage is incomplete, offer to file an issue or research and install a detector #4524, audit-dead-code: docs overstate grep-lane and orphaned-file coverage #4525.
• Found in the repo-sweep hygiene sweep of melodic-software/.github, PR chore(skill-quality): harden static checker + record terminal retrofit scope #153.

[kyle-sexton]

Reopened. The shipped scope covered only the no-change path. This comes from the 2026-09-29 audit of the unattended Cursor run.

PR 4862 delivered the partial tick, but the audit found three gaps:

• history.sh treated any old partial as permanent (T1), so one old partial tick forced a rerun forever.
• A step that ends in a commit had no partial form, so the uncovered scope was lost.
• "partial" hid the report-only count (T2). The fix uses a --partial suffix and outcome-first ordering.

Fixed in #5295, which uses Closes #4526 because every acceptance criterion is met on the branch. Duplicate search (open and closed) for partial coverage on a committed step and for the sticky history.sh flag found nothing, so no follow-up is filed.