Conciseness

The body is lean and earns every token: a decision table, a five-step workflow, one complete code example, a result-type union, and terse rules — no explanation of what slash commands or mods are, and no padding. It matches the 5-anchor ("lean and efficient; assumes Claude's competence") rather than 4, which would require identifiable over-explanation to trim.

Actionability

Guidance is fully executable: exact file paths (~/.letta/mods/review.ts), a copy-paste-ready activate() example with register(), a concrete result-type union with usage guidance for each variant, and a workflow with specific API calls (letta.commands.register(), letta.capabilities.commands guard, /reload). Rules are checkable ("Command IDs omit the slash"), leaving no significant gaps from the 5-anchor.

Workflow Clarity

"1. Inspect ~/.letta/mods/... 2. Preserve unrelated mod code... 3. Register... 4. Return the unregister function... 5. Tell the user... to run /reload" is a clear, ordered sequence, and the upfront decision table acts as a checkpoint. It stops short of 5 because there is no explicit validation or error-recovery step (e.g. verifying the command registered correctly after /reload) — this is file creation, not a destructive/batch operation, so the cap-at-3 rule does not apply.

Progressive Disclosure

The body is a well-organized overview (~85 lines, seven headed sections) that delegates all advanced material through clearly signaled, one-level-deep references with per-file topic labels ("Simple output command, panel command...: ../creating-mods/references/commands.md" etc. under "More recipes"), exactly matching the 5-anchor pattern. No bundle directories exist in this skill, and no content that should be separate is inlined, so there is no nesting or burial to penalize.

Specificity

"Creates, edits, and enables Letta Code mod-provided slash commands" names a specific domain and lists three concrete actions, matching the anchor for several specific actions with minor coverage gaps ("enables" is the least concrete; registration/result types/panels are left to the body). It falls below 5 because the actions are less granular than the 5-anchor's multi-action comprehensiveness, and above 3 because three actions plus a named domain exceed the 1-2-action anchor.

Completeness

It explicitly answers both questions: what ("Creates, edits, and enables Letta Code mod-provided slash commands") and when ("Use when the user asks to add a custom /command, slash command, command shortcut...") with concrete trigger phrases, matching the 5-anchor pattern exactly. The explicit 'Use when' clause rules out the cap at 3.

Trigger Term Quality

"custom /command, slash command, command shortcut, scoped conversation-backed command, or command-driven panel behavior" gives good coverage of natural phrases a user would say. Not 5 because a few natural synonyms are missing (e.g. "add a /command", "mod command" as a plain keyword, "create a command for..."); not 3 because coverage clearly goes beyond one or two generic keywords.

Distinctiveness Conflict Risk

"Letta Code mod-provided slash commands" carves a clear niche, but generic trigger terms like "slash command" and "command shortcut" carry minor overlap risk with closely related command or mod skills (this very skill defers to a sibling creating-mods skill for broader command recipes). Not 5 because of that adjacent-skill overlap; not 3 because the Letta Code mod scoping makes wrong-skill triggering unlikely.