Conciseness

The body is efficient — command examples, a cron mapping table, a fill-in prompt template, and a JSON schema with no padding or explanations of concepts Claude already knows. The one trimmable redundancy is the 3-day auto-expiry stated three times ("Auto-expires: 3 days (CronCreate limit)", the "Note: Recurring jobs auto-expire after 3 days" line in the confirmation block, and the "3-day auto-expiry" bullet in Important Limitations), which fits anchor 4 ("Efficient; minor instances of over-explanation that could be trimmed") rather than anchor 5's every-token-earns-its-place.

Actionability

Guidance is almost entirely executable: exact CLI invocations, a concrete cron-expression table, a copy-paste CronCreate prompt template with clearly marked placeholders, an exact loop.json shape, and a numbered stop procedure. The gap is that the iteration instructions call "python {skill_path}/scripts/run_experiment.py --experiment {domain}/{name} --single", a script that is not present in this bundle (no scripts/ directory exists), so that command cannot be executed as delivered — anchor 4 ("Mostly executable guidance; concrete code or commands with minor gaps") rather than anchor 5's fully copy-paste-ready coverage.

Workflow Clarity

The setup flow (resolve experiment → select interval → create job → store metadata → confirm) and the stop flow are clearly sequenced, and the recurring prompt embeds feedback loops — "Read the output (KEEP/DISCARD/CRASH)" and "If 5 consecutive crashes in results.tsv, delete this cron job (CronDelete) and alert" — which guard the batch/automated-commit operation. Minor validation gaps remain: no instruction on what to do after a DISCARD outcome, and no verification step between CronCreate and writing loop.json (the cron_id is captured implicitly). This matches anchor 4 ("Clear sequence with most checkpoints present; minor validation gaps") rather than anchor 5's explicit validation steps with error-recovery loops, and the crash-streak/evaluate checkpoints keep it above anchor 3.

Progressive Disclosure

The single-file body is well organized into clearly signaled sections (Usage, What It Does by step, Stopping a Loop, Important Limitations) with content appropriately placed inline for a ~116-line command skill. Anchor 5 is not reached because the body points to paths that are not in the bundle — "{skill_path}/scripts/run_experiment.py" and the "/ar:ar-status" command are dangling references with no scripts/ or references/ directory present — fitting anchor 4 ("Good structure; most content is appropriately placed; references mostly clear; minor organization gaps") rather than anchor 5's clean, fully resolvable one-level-deep references.

Specificity

The description names the domain and 1-2 concrete actions — "Start an autonomous experiment loop with user-selected interval (10min, 1h, daily, weekly, monthly)" and "run an autoresearch experiment continuously on a schedule" — but coverage is not comprehensive: it omits stopping loops, restarting after expiry, and what each loop iteration actually does, and "Uses CronCreate for scheduling" is an implementation detail rather than a user-facing capability. It lists several interval specifics but only a couple of actual actions, fitting anchor 3 ("Names domain and 1-2 concrete actions, but not comprehensive") better than anchor 4's "several specific actions".

Completeness

Both questions are answered explicitly: the "what" is "Start an autonomous experiment loop with user-selected interval (10min, 1h, daily, weekly, monthly)" and the "when" is "Use when the user runs /ar:loop or asks to run an autoresearch experiment continuously on a schedule" — concrete trigger phrases, matching anchor 5. Anchor 4 does not fit because the "when" clause could not meaningfully be more explicit; it already names two specific invocation triggers.

Trigger Term Quality

Good natural keyword coverage: "experiment loop", "run an autoresearch experiment continuously on a schedule", "interval", and the command "/ar:loop" — phrases a user would plausibly say. A few common variations are missing ("recurring", "repeat", "every hour/day", "automatically"), so it fits anchor 4 ("Good keyword coverage; a few natural terms missing") rather than anchor 5's comprehensive synonym list.

Distinctiveness Conflict Risk

The description occupies a clear niche — autoresearch experiment scheduling via the /ar:loop command — with triggers ("autoresearch experiment", "/ar:loop") that are unique to this skill and unlikely to fire for unrelated skills, matching anchor 5 ("Clear niche with distinct triggers; minimal conflict risk"). Anchor 4's "minor overlap risk with closely related skills" would apply only if the scope were diluted, e.g. triggering on generic "run this repeatedly" requests.