Conciseness

The body is lean with zero padding: no explanations of concepts Claude already knows, no filler prose — sections like "Default stance" and "Notes to surface" are pure operational facts. Every token earns its place, matching anchor 5 rather than anchor 4 (which still allows minor trimming).

Actionability

Most steps are executable copy-paste commands ("./afs ws import --mount-at-source .codex ~/.codex", "./afs config set --mode mount", rollback bash blocks), but a few gaps remain: "Configure afs to point at the shared Redis instance" and "Point the CLI at the same control plane or Redis database" give no concrete command, and "move aside any existing ~/.codex" lacks the exact mv command. This fits anchor 4 (mostly executable with minor gaps), below anchor 5's fully copy-paste-ready coverage.

Workflow Clarity

The 8-step migration sequence is clearly ordered with an explicit verification step ("Verify with ./afs status and ls -la ~/.codex") and a rollback section providing error recovery. However, verification comes only at the end — there is no checkpoint after the source-machine import or after each secondary machine's mount, and no validate-then-retry feedback loop. That places it at anchor 4 rather than anchor 5; it also stays above anchor 3 because a validation step is present for this potentially destructive migration.

Progressive Disclosure

The body is a compact, well-sectioned overview (~55 lines) with the only detailed material — the starter ignore file — correctly externalized as a one-level-deep, well-signaled reference to [assets/.afsignore](assets/.afsignore), which exists and matches the patterns listed in the body. Structure and navigation are clean, matching anchor 5; the skill does not need additional reference files.

Specificity

The description names concrete actions — "migrate Codex state in ~/.codex into Agent Filesystem", "mount the same shared Codex memory/settings across multiple computers", "Recommends a .afsignore before migration", "defaults to excluding worktrees, caches, logs, and temporary files" — which is several specific actions with only minor coverage gaps (config and rollback steps are not mentioned). It exceeds anchor 3 (only 1-2 concrete actions) but does not fully match anchor 5's comprehensive coverage of everything the skill does.

Completeness

Both parts are explicit: the "what" is migrating Codex state into Agent Filesystem, mounting it across machines, recommending a .afsignore with specific default exclusions; the "when" is the leading clause "Use when the user wants to migrate Codex state in ~/.codex into Agent Filesystem and mount the same shared Codex memory/settings across multiple computers". This clearly matches anchor 5 (explicit what AND when with concrete trigger phrases), well above anchor 4 where the 'when' is only adequate.

Trigger Term Quality

Natural user phrases are present: "migrate Codex state", "shared Codex memory/settings", "across multiple computers", "worktrees, caches, logs". A few natural synonyms are missing — users would plausibly say "sync Codex settings", "share Codex across machines", or "back up .codex" — so it fits anchor 4 (good coverage, a few natural terms missing) rather than anchor 5's synonym-and-extension completeness.

Distinctiveness Conflict Risk

The niche is highly specific — Codex, ~/.codex, Agent Filesystem, .afsignore, Redis-backed shared state — so it is clearly distinguishable from other skills and unlikely to fire for the wrong one, matching anchor 5 (clear niche with distinct triggers, minimal conflict risk).