[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill-jetbrains-mps-aspect-intentions":3,"mdc--6sfc0x-key":32,"related-repo-jetbrains-mps-aspect-intentions":1165,"related-org-jetbrains-mps-aspect-intentions":1238},{"slug":4,"name":4,"fn":5,"description":6,"org":7,"tags":11,"stars":19,"repoUrl":20,"updatedAt":21,"license":22,"forks":23,"topics":24,"repo":27,"sourceUrl":30,"mdContent":31},"mps-aspect-intentions","define and edit MPS intentions","Use when defining or editing MPS intentions (the Alt+Enter context-action aspect) — adding `IntentionDeclaration` roots, parameterized or surround-with variants, description\u002FisApplicable\u002Fexecute blocks, child-filter functions, factory-initialized AST splicing, or debugging why an intention is not offered. Lives in the language's `intentions` model and uses `jetbrains.mps.lang.intentions`.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},"jetbrains","JetBrains","https:\u002F\u002Fpexgzepcugksgbtrxkhf.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Forg-logos\u002Fjetbrains.png",[12,16],{"name":13,"slug":14,"type":15},"Architecture","architecture","tag",{"name":17,"slug":18,"type":15},"Engineering","engineering",1650,"https:\u002F\u002Fgithub.com\u002FJetBrains\u002FMPS","2026-07-23T05:41:48.692899",null,311,[25,26],"domain-specific-language","dsl",{"repoUrl":20,"stars":19,"forks":23,"topics":28,"description":29},[25,26],"JetBrains Meta programming System","https:\u002F\u002Fgithub.com\u002FJetBrains\u002FMPS\u002Ftree\u002FHEAD\u002Fplugins\u002Fmcp-tools\u002Fresources\u002Fjetbrains\u002Fmps\u002Fagents\u002Fmcp\u002Fskills\u002Fmps-aspect-intentions","---\nname: mps-aspect-intentions\ndescription: Use when defining or editing MPS intentions (the Alt+Enter context-action aspect) — adding `IntentionDeclaration` roots, parameterized or surround-with variants, description\u002FisApplicable\u002Fexecute blocks, child-filter functions, factory-initialized AST splicing, or debugging why an intention is not offered. Lives in the language's `intentions` model and uses `jetbrains.mps.lang.intentions`.\ntype: reference\n---\n\n# MPS Intentions Aspect\n\nIntentions are user-invoked transformations shown in the Alt+Enter popup on a node. They are the canonical way to offer optional refactorings (wrap, convert, introduce, preview) alongside quick-fixes. Authoring lives in `\u003Clang>\u002FlanguageModels\u002Fintentions.mps`, language `jetbrains.mps.lang.intentions`.\n\n## Critical Directives\n\n- Edit intention roots through MPS MCP tools (`mps_mcp_insert_root_node_from_json`, `mps_mcp_update_node`, `mps_mcp_parse_java_and_insert`). Do not hand-edit serialized `.mps` files.\n- The intentions model must list every language used in any block body as a used language. In particular, the `add new initialized(...)` surface syntax requires `jetbrains.mps.lang.actions` — add it with `mps_mcp_model_used_language(kind=\"language\")`. Plain (non-`NF_*`) variants like `parent.role.add new(C)` do not need this import.\n- Use `n as C` (MPS `SNodeTypeCastExpression` with `asCast=true`) — never a Java `(C) n` cast.\n- Use `:eq:` (`NPEEqualsExpression`) instead of `==` whenever either operand might be `null`.\n- The execute body runs on the EDT inside an MPS write action automatically — do not spawn threads or open dialogs that block.\n- `descriptionFunction` runs every time the Alt+Enter popup opens — keep it cheap.\n- After editing, validate with `mps_mcp_check_root_node_problems` on the intention root and rebuild the language before testing.\n\n## Common-Path Workflow\n\n1. Ensure an `intentions` model exists in the language (create with `mps_mcp_create_model` and `modelName: \"\u003Clang>.intentions\"` — aspect ID `intentions`, case-sensitive, no `@` suffix; see [aspect-model-stereotypes.md](..\u002Fmps-mcp-workflow\u002Freferences\u002Faspect-model-stereotypes.md)). Used languages: `jetbrains.mps.lang.intentions`; add `jetbrains.mps.lang.actions` if you will use factory-initialized splicing.\n2. Insert an `IntentionDeclaration` root with `mps_mcp_insert_root_node_from_json` (see blueprint in `references\u002Fjson-blueprints.md`). Set `name`, `forConcept`, and `isAvailableInChildNodes` if the popup should bubble from descendants.\n3. Fill `descriptionFunction` (returns a short label String), `executeFunction` (the transformation), and optionally `isApplicableFunction` (gate predicate) and `childFilterFunction` (per-descendant filter when `isAvailableInChildNodes=true`).\n4. For multiple menu entries per blueprint use `ParameterizedIntentionDeclaration` with `paramType` + `queryFunction`; use `IntentionParameter` wherever you want \"the current value\" inside other blocks.\n5. For wrap-the-selection transforms use `SurroundWithIntentionDeclaration` and read `editorContext.getSelectedNodes()`.\n6. Validate (`mps_mcp_check_root_node_problems`), rebuild the language, exercise via Alt+Enter on a sandbox instance. Headlessly: after MAKE, call `mps_mcp_list_node_intentions` on a sandbox node to confirm the intention is registered and shows the expected description, then `mps_mcp_apply_intention(nodeReference = \u003Cthe entry's targetNode>, intentionId = \u003Cthe entry's id>)` to smoke-test `executeFunction` (for parameterized declarations also pass the row `description`). Surround-with intentions are not covered by these tools.\n\n## Implicit parameters available in every block\n\n| Alias | FQN | Where |\n|---|---|---|\n| `node` | `jetbrains.mps.lang.intentions.structure.ConceptFunctionParameter_node` | All blocks; typed as `forConcept`. In `ChildFilterFunction` this is the nearest enclosing `forConcept` ancestor. |\n| `editorContext` | `jetbrains.mps.lang.sharedConcepts.structure.ConceptFunctionParameter_editorContext` | All blocks; the current `EditorContext`. |\n| `childNode` | `jetbrains.mps.lang.intentions.structure.ConceptFunctionParameter_childNode` | Only inside `ChildFilterFunction`; the descendant under the cursor. |\n| `parameter` (`IntentionParameter`) | `jetbrains.mps.lang.intentions.structure.IntentionParameter` | Only inside `ParameterizedIntentionDeclaration` blocks; resolves to the current queried value. |\n\n## Related Skills\n\n- `mps-aspect-actions` — when the intention needs factory-initialized children, the NodeFactories live there.\n- `mps-aspect-constraints` — for gating that should apply everywhere (not just Alt+Enter), prefer can-be rules over `isApplicable`.\n- `mps-aspect-editor-menus-and-keymaps` — when the action belongs on a substitute\u002Ftransformation menu or a keystroke, not in the Alt+Enter popup.\n- `mps-model-manipulation` — full smodel\u002FbaseLanguage\u002Fcollections reference; covers the `NF_*` family and the dual `IsEmptyOperation`.\n- `mps-node-editing` — MCP recipes for inserting children, updating references, and staged construction.\n- `mps-aspect-structure-concepts` — when adding the concept that `forConcept` targets.\n- `mps-quotations` — when the execute body builds a complex subtree literal.\n- `mps-tests` → `EditorTestCase` — for testing that an intention is offered and produces the expected tree.\n\n## Reference Index\n\n- Open `references\u002Fblocks-and-parameters.md` when wiring `descriptionFunction`, `isApplicableFunction`, `executeFunction`, or `childFilterFunction`, or when you need to look up the implicit parameter concept FQNs for any of them.\n- Open `references\u002Fexecute-idioms.md` when writing an `executeFunction` body — typical AST-editing operations (insert sibling, isInstanceOf, asCast, list add, select-in-editor), the verbatim `WrapInParens` and `AddOnEntry` examples, the attach-an-annotation (node attribute) idiom (`forConcept = BaseConcept` + context-gated `isApplicable`, `.@role.add(...)` vs `.@Mark = ...`), and the `SelectInEditorOperation` JSON shape live there.\n- Open `references\u002Ffactory-initialized.md` when an `executeFunction` allocates new nodes and you want the concept's NodeFactory to seed defaults — the `NF_*` family table, the `add new initialized(\u003Cdefault>)` semantics, and the used-language requirement live there.\n- Open `references\u002Fparameterized-intentions.md` when authoring or debugging a `ParameterizedIntentionDeclaration` — `paramType` + `queryFunction` semantics, `IntentionParameter` usage, the per-value `isApplicableFunction` filter, and the full `SetCardinalityTo` example and JSON skeleton are there.\n- Open `references\u002Fsurround-and-child-filter.md` when authoring a `SurroundWithIntentionDeclaration` or when configuring `isAvailableInChildNodes` + a `ChildFilterFunction` — verbatim `WrapInParens` and `AddOnEntry.childFilterFunction` walk-throughs are there.\n- Open `references\u002Fjson-blueprints.md` when inserting an intention root via `mps_mcp_insert_root_node_from_json` — minimal blueprints for `IntentionDeclaration`, `ParameterizedIntentionDeclaration`, and `SurroundWithIntentionDeclaration` and the validated concept-reference table.\n- Open `references\u002Fcommon-failures.md` when an intention does not appear, fires on the wrong node, leaves the caret in the wrong place, or shows duplicates — the symptom\u002Fcause\u002Ffix table is there.\n",{"data":33,"body":35},{"name":4,"description":6,"type":34},"reference",{"type":36,"children":37},"root",[38,47,70,77,264,270,535,541,728,734,861,867],{"type":39,"tag":40,"props":41,"children":43},"element","h1",{"id":42},"mps-intentions-aspect",[44],{"type":45,"value":46},"text","MPS Intentions Aspect",{"type":39,"tag":48,"props":49,"children":50},"p",{},[51,53,60,62,68],{"type":45,"value":52},"Intentions are user-invoked transformations shown in the Alt+Enter popup on a node. 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Use when adding\u002Fremoving module dependencies, importing languages or devkits into a model, declaring runtime solutions, or shipping accessory content visible to consumers without explicit import.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1173,1174,1177],{"name":13,"slug":14,"type":15},{"name":1175,"slug":1176,"type":15},"Configuration","configuration",{"name":17,"slug":18,"type":15},"2026-07-17T06:06:57.311661",{"slug":745,"name":745,"fn":1180,"description":1181,"org":1182,"tags":1183,"stars":19,"repoUrl":20,"updatedAt":1186},"define and edit MPS node factories","Use when defining or editing MPS node factories (the \"actions\" aspect) — `NodeFactories` roots, per-concept `NodeFactory` setup functions that initialize a freshly created node and optionally copy data from a replaced `sampleNode`, plus the actions aspect's `CopyPasteHandlers` and `PasteWrappers` roots. 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Covers DataFlowBuilderDeclaration, BuilderBlock, emit instructions (code for, jump, ifjump, label, read, write, ret, mayBeUnreachable), positions (AfterPosition, BeforePosition, LabelPosition), the jetbrains.mps.lang.dataFlow language, the NodeParameter implicit, BL+smodel usage inside builder bodies, and IBuilderMode for advanced analyses such as nullable\u002Fnon-null tracking.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1212],{"name":1213,"slug":1214,"type":15},"Data Analysis","data-analysis","2026-07-13T06:45:19.114674",{"slug":1217,"name":1217,"fn":1218,"description":1219,"org":1220,"tags":1221,"stars":19,"repoUrl":20,"updatedAt":1228},"mps-aspect-editor","define MPS editor layouts","Use when creating or changing MPS editor definitions — the overall workflow from scaffolding a `ConceptEditorDeclaration` through componentizing reusable `EditorComponentDeclaration`s, refining cell models and cell layouts, applying style sheets and indent-layout style items, wiring smart references, leveraging inheritance via super-concepts and interfaces, inspecting (`print_node_json`, `show_node_representation`) and validating (`check_root_node_problems`). 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Covers action maps (`CellActionMapDeclaration`), cell keymaps (`CellKeyMapDeclaration`), transformation menus (`TransformationMenu_Default` \u002F `_Named` \u002F `_Contribution`), substitute menus (`SubstituteMenu_Default` \u002F `SubstituteMenu` \u002F contributions), side transforms (LEFT\u002FRIGHT), legacy cell menus, paste wrappers and copy-paste handlers (in the actions language), completion styling, reference presentation, two-step deletion, and the editor selection API. Trigger terms: `actionMap`, `keyMap`, `delete_action_id`, `transformationMenu`, `substituteMenu`, `Ctrl+Space`, `Ctrl+Alt+B`, side transform, paste wrapper, completion styling, `PasteWrappers`, `CopyPasteHandlers`. For the **layout** side (cells, layouts, style sheets) use `mps-aspect-editor` instead.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1234,1235],{"name":17,"slug":18,"type":15},{"name":1226,"slug":1227,"type":15},"2026-07-23T05:41:49.666535",31,{"items":1239,"total":1321},[1240,1246,1251,1256,1261,1265,1270,1275,1284,1294,1299,1312],{"slug":1168,"name":1168,"fn":1169,"description":1170,"org":1241,"tags":1242,"stars":19,"repoUrl":20,"updatedAt":1178},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1243,1244,1245],{"name":13,"slug":14,"type":15},{"name":1175,"slug":1176,"type":15},{"name":17,"slug":18,"type":15},{"slug":745,"name":745,"fn":1180,"description":1181,"org":1247,"tags":1248,"stars":19,"repoUrl":20,"updatedAt":1186},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1249,1250],{"name":13,"slug":14,"type":15},{"name":17,"slug":18,"type":15},{"slug":1188,"name":1188,"fn":1189,"description":1190,"org":1252,"tags":1253,"stars":19,"repoUrl":20,"updatedAt":1195},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1254,1255],{"name":13,"slug":14,"type":15},{"name":17,"slug":18,"type":15},{"slug":756,"name":756,"fn":1197,"description":1198,"org":1257,"tags":1258,"stars":19,"repoUrl":20,"updatedAt":1205},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1259,1260],{"name":13,"slug":14,"type":15},{"name":1203,"slug":1204,"type":15},{"slug":1207,"name":1207,"fn":1208,"description":1209,"org":1262,"tags":1263,"stars":19,"repoUrl":20,"updatedAt":1215},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1264],{"name":1213,"slug":1214,"type":15},{"slug":1217,"name":1217,"fn":1218,"description":1219,"org":1266,"tags":1267,"stars":19,"repoUrl":20,"updatedAt":1228},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1268,1269],{"name":1223,"slug":1224,"type":15},{"name":1226,"slug":1227,"type":15},{"slug":774,"name":774,"fn":1230,"description":1231,"org":1271,"tags":1272,"stars":19,"repoUrl":20,"updatedAt":1236},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1273,1274],{"name":17,"slug":18,"type":15},{"name":1226,"slug":1227,"type":15},{"slug":1276,"name":1276,"fn":1277,"description":1278,"org":1279,"tags":1280,"stars":19,"repoUrl":20,"updatedAt":1283},"mps-aspect-generation-plan","modify MPS generation plans","Use when defining or modifying an MPS generation plan — explicit ordering of generators, checkpoints for cross-model reference resolution, forks for parallel branches, IncludePlan composition, conditional PlanContribution activation, ParameterEquals\u002FConceptListSelector fork selectors, and InitModelAttributes for targetFacet routing. Apply when working with @genplan models, the jetbrains.mps.lang.generator.plan language, attaching plans via DevKits or the Custom generation facet, or debugging cross-model mapping label resolution.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1281,1282],{"name":13,"slug":14,"type":15},{"name":17,"slug":18,"type":15},"2026-07-13T06:44:59.507855",{"slug":1285,"name":1285,"fn":1286,"description":1287,"org":1288,"tags":1289,"stars":19,"repoUrl":20,"updatedAt":1293},"mps-aspect-generator","define JetBrains MPS generator rules","Use when defining or modifying MPS generators — author a generator module, add or edit root\u002Freduction\u002Fweaving\u002Fpattern mapping rules, attach template macros ($COPY_SRC, $LOOP, $IF, $PROPERTY, $REF, $SWITCH, $MAP_SRC, $WEAVE, $INSERT, $LABEL, $TRACE, $VAR), wire mapping labels, build template switches, write pre\u002Fpost mapping scripts, navigate `genContext`, or debug \"rule didn't fire\", missing references, empty output, infinite reduction loops, and generated-Java compile failures.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1290,1291,1292],{"name":13,"slug":14,"type":15},{"name":1203,"slug":1204,"type":15},{"name":17,"slug":18,"type":15},"2026-07-17T06:06:58.042999",{"slug":4,"name":4,"fn":5,"description":6,"org":1295,"tags":1296,"stars":19,"repoUrl":20,"updatedAt":21},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1297,1298],{"name":13,"slug":14,"type":15},{"name":17,"slug":18,"type":15},{"slug":1300,"name":1300,"fn":1301,"description":1302,"org":1303,"tags":1304,"stars":19,"repoUrl":20,"updatedAt":1311},"mps-aspect-migrations","author and debug MPS migration scripts","Use when authoring or debugging MPS migration scripts that upgrade user models after a language definition changes — covers jetbrains.mps.lang.migration (MigrationScript class-based, PureMigrationScript declarative, MoveConcept\u002FMoveContainmentLink\u002FMoveReferenceLink\u002FMoveProperty, ordering via OrderDependency, data exchange via putData\u002FgetData, RefactoringLog, ConceptMigrationReference) and jetbrains.mps.lang.script Enhancement Scripts (MigrationScript with MigrationScriptPart_Instance, ExtractInterfaceMigration, FactoryMigrationScriptPart, CommentMigrationScriptPart) — when a model needs version-gated upgrade, concept rename or removal, link or property rename, instance-level transformation, or composition of migration steps.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1305,1308],{"name":1306,"slug":1307,"type":15},"Debugging","debugging",{"name":1309,"slug":1310,"type":15},"Migration","migration","2026-07-13T06:45:20.372122",{"slug":821,"name":821,"fn":1313,"description":1314,"org":1315,"tags":1316,"stars":19,"repoUrl":20,"updatedAt":1320},"define concepts in MPS structure aspect","Define concepts, interface concepts, enumerations, and constrained data types in an MPS language's `structure` aspect. Covers smart-reference detection, alias rules, cardinality, INamedConcept usage, bulk creation, and the full `mps_mcp_alter_structure` \u002F `mps_mcp_query_structure` reference. Use when authoring or modifying a language's structure model.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[1317],{"name":1318,"slug":1319,"type":15},"Data Modeling","data-modeling","2026-07-23T05:41:30.705975",188]