Conciseness

The body is dense with actionable rules, tables, and commands rather than explanations of concepts Claude already knows, but there is minor repetition: file-placement guidance appears in 'Where Files Go', the 'Note' callout, and the Anti-Patterns table, and 'Quick Start' overlaps the 'New plan creation contract'. This matches 'efficient with minor instances that could be trimmed' rather than the every-token-earns-its-place level of score 5.

Actionability

Concrete, runnable guidance dominates: copy-paste bash and PowerShell snippets for session-catchup.py, init-session.sh, check-complete.sh --validate, and set-active-plan.sh --list/--archive, plus an explicit format contract ('### Phase N: Name with exactly one **Status:** pending/in_progress/complete line'). Minor gaps — the '<skill-dir>' placeholder substitution and an opening that interleaves restore, catchup, and resolve instructions — keep it below the fully copy-paste-ready bar of score 5.

Workflow Clarity

The multi-step lifecycle is clearly sequenced (restore/resolve plan dir, read planning files, init new plan, validate, execute phases, update after each phase, escalate after 3 failures) with explicit validation checkpoints ('Validation must succeed before substantive work and after changing phase structure'), a feedback loop in the 3-Strike Error Protocol, and a preview/confirm safety step for the destructive archive operation ('--archive previews the move... --yes applies it'). This matches the score-5 anchor: clear sequence, explicit validation, error-recovery loops, and checklists.

Progressive Disclosure

The body is a genuine overview with well-signaled, one-level-deep references (Templates, Scripts, Advanced Topics, plan-inventory) and appropriately outsourced detail. However, scored against the actual bundle: the three templates/task_*.md links point to a nonexistent templates/ directory, and the reference.md and examples.md links point to the skill root while the files actually live in references/ — only references/plan-inventory.md resolves as written. These are more than the 'minor organization gaps' of score 4's ceiling but the structure itself is better than the poorly-signaled case of score 3, placing it between anchors; the broken paths and inconsistent reference locations pull it to the middle.

Specificity

The description lists several concrete actions and artifacts — 'Keeps task_plan.md, findings.md, and progress.md on disk', 'lifecycle hooks inject selected project planning context', and the session-catchup.py --metadata/--replay behavior — but never enumerates the core planning workflow actions (create plan, track phases, validate), and a large share of the text is privacy/security caveat rather than capability. It sits above score 3 (which requires only 1-2 concrete actions) but below 5 due to the coverage gaps.

Completeness

Both what and when are explicitly present: 'Persistent file-based planning... Keeps task_plan.md, findings.md, and progress.md on disk' answers what, and 'Use for research or work needing 5+ tool calls' answers when. The when-clause is explicit but narrow — a single trigger condition rather than the concrete multi-phrase trigger set of the score-5 anchor, while clearly stronger than a merely implied 'when' at score 3.

Trigger Term Quality

Relevant keywords like 'planning', 'multi-step', 'research', and '5+ tool calls' are present, but common natural phrases a user would say — 'long task', 'break this down', 'track progress', 'stay organized', 'todo' — are missing. Coverage is neither the sparse one-or-two-generic-keyword case (2) nor the good-coverage-with-few-missing case (4).

Distinctiveness Conflict Risk

Named planning files (task_plan.md, findings.md, progress.md) and the session-catchup.py script give it a distinct identity, but the broad terms 'planning' and 'research' create minor overlap risk with general todo/task-tracking and research-organization skills. Mostly distinct with minor overlap, matching score 4 rather than the minimal-conflict niche of score 5.