The body is lean and assumes competence—concrete concept names, language id/version, cardinalities, and MCP tool calls with no padding beyond a brief two-sentence motivation. Not a 2 because there is no unnecessary explanation of concepts Claude already knows; every section earns its place.

Provides concrete, actionable guidance—exact concept names (Plan, Transform, Checkpoint, Fork, PlanContribution), cardinalities ('1..n', cardinality 1), file pattern '<name>@genplan.mps', and named MCP tools (mps_mcp_create_model, mps_mcp_check_root_node_problems). Per the instruction-only scoring note, the absence of inline JSON is not penalized because the guidance is specific and the verified blueprints are correctly deferred to references.

The 'Common-Path Workflow' is a clearly sequenced 8-step process ending in an explicit validation step ('Verify with MPS UI Show generation plan and mps_mcp_check_root_node_problems'), reinforced by 'Critical Directives' guardrails and an authoring-checklist reference. Not a 2 because validation is explicit rather than missing or merely implicit.

A concise overview with a well-signaled 'Reference Index' of ten one-level-deep reference links, each prefaced with an 'open when…' trigger; all referenced files were verified present in ./references/, and detailed JSON/catalog content is appropriately split out rather than inlined.

Lists multiple concrete capabilities—'explicit ordering of generators, checkpoints for cross-model reference resolution, forks for parallel branches, IncludePlan composition, conditional PlanContribution activation, ParameterEquals/ConceptListSelector fork selectors, and InitModelAttributes for targetFacet routing'—matching the anchor for enumerating specific actions rather than vague language.

Explicitly answers both what (the enumerated generation-plan features) and when via 'Use when…' and 'Apply when…' trigger clauses. Not a 2 because the 'when' is explicit, not merely implied.

Covers the domain's natural trigger terms a user would say—'defining or modifying an MPS generation plan', '@genplan models', 'jetbrains.mps.lang.generator.plan language', 'DevKits', 'Custom generation facet', 'cross-model mapping label resolution'—with good breadth rather than generic jargon. Not a 2 because it covers the common variations an MPS user would actually invoke, not just a single keyword.

Occupies a narrow, well-defined MPS generation-plan niche with distinct technical triggers, making accidental activation by unrelated skills unlikely.