[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill-jetbrains-mps-run-configurations":3,"mdc--u4ycfa-key":32,"related-repo-jetbrains-mps-run-configurations":719,"related-org-jetbrains-mps-run-configurations":799},{"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-run-configurations","execute MPS run configurations","Create and execute IDE run configurations for MPS root nodes via MPS MCP — Java Application for `IMainClass` \u002F `ClassConcept` with `main`, JUnit Tests for `ITestCase`. Use when launching DSL `main`-like roots, plain BaseLanguage `ClassConcept` mains, or MPS test cases from a node; reusing or replacing an existing run config; diagnosing `ClassNotFoundException`, `compileInMPS=false`, or \"not runnable through this tool\" failures.",{"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},"Java","java","tag",{"name":17,"slug":18,"type":15},"Testing","testing",1650,"https:\u002F\u002Fgithub.com\u002FJetBrains\u002FMPS","2026-07-13T06:44:58.237",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-run-configurations","---\nname: mps-run-configurations\ndescription: Create and execute IDE run configurations for MPS root nodes via MPS MCP — Java Application for `IMainClass` \u002F `ClassConcept` with `main`, JUnit Tests for `ITestCase`. Use when launching DSL `main`-like roots, plain BaseLanguage `ClassConcept` mains, or MPS test cases from a node; reusing or replacing an existing run config; diagnosing `ClassNotFoundException`, `compileInMPS=false`, or \"not runnable through this tool\" failures.\ntype: reference\n---\n\n# Running MPS Root Nodes\n\nThis skill covers the path from \"an MPS root node exists in a model\" to \"a green IDE run \u002F red stack trace in my hand,\" using only MCP tools. It targets user-level artifacts (DSL `main`-like roots, plain `ClassConcept` mains, test cases) — **not** launching MPS itself (the `MPS` \u002F `MPS (2nd inst.)` configs are a different topic, see `AGENTS.md` or `CLAUDE.md`).\n\n## Critical Directives\n\n- `execute_run_configuration` and `get_run_configurations` are provided both by MPS and IDEA. Use the ones provided by MPS for running MPS nodes\u002Ftests.\n- **`mps_mcp_create_run_configuration` accepts root nodes only**, and only three shapes: implements `IMainClass`, implements `ITestCase`, or is a `ClassConcept` with a qualifying static `main`. Pointing it at a method body or other non-root yields the non-root rejection. See `references\u002Frunnable-shapes.md` for the exact predicate and producer precedence.\n- **MAKE the *module*, not just the model, before running.** Model MAKE regenerates `source_gen` but does not always compile into `classes_gen`; running launches bytecode, so a stale `classes_gen` silently runs old code. See `references\u002Fcompile-before-run.md`.\n- **Keep `configurationName` stable across iterations.** The tool replaces the existing config of the same `\u003Ctype>.\u003Cname>` rather than creating duplicates — idempotent setup is the goal. Use distinct names only when you actually want parallel configs.\n- **Do not silently flip `compileInMPS=false` to true.** `Compile.None` and JPS-compile settings are usually intentional (sandbox modules, externally-built modules, packaged libraries). Confirm with the user; otherwise take the IDEA MCP file-path fallback.\n- **Prefer the source-root path over generated-Java entry points.** Source-root configs survive regeneration; file-path configs against `source_gen` only work while `classes_gen` is fresh.\n- **MPS MCP `execute_run_configuration` \u002F `get_run_configurations` do not surface run points under `source_gen`.** Use the IDEA MCP variants when you need a `filePath`+`line` launcher for generated Java.\n- **Reuse before you create.** If the user already has a working run config, prefer `get_run_configurations()` + `execute_run_configuration` by its existing name — duplicates are pointless.\n\n## Common Workflow\n\nEnd-to-end pattern for \"I changed a DSL root, run it\":\n\n1. `mps_mcp_alter_nodes MAKE` on the **module** of the DSL root, `rebuild: true`.\n2. `mps_mcp_create_run_configuration` on the DSL root with a stable `configurationName` (the generated class FQN is a good default for IMainClass; leave blank for `ClassConcept` to match the IDE gutter's `Class \u003CClassName>` default).\n3. `execute_run_configuration` (of MPS MCP, not IDEA's) by name with `waitForExit: true` and a generous `timeout`.\n4. On `Could not find or load main class`, step 1 didn't reach `classes_gen` — re-run it.\n\nKeep the configuration name stable across iterations so step 2 idempotently overwrites itself rather than littering the IDE with duplicates.\n\n## Related Skills\n\n- **`mps-baselanguage`** — when the runnable root is a plain `ClassConcept` you authored or need to inspect (`main` method shape, BaseLanguage editing).\n- **`mps-aspect-generator`** — when stale or wrong generated Java is the root cause of an execution failure.\n- **`mps-bugfix`** — when an execution failure points back at the generator or model rather than the launcher.\n\n## Reference Index\n\n- Open `references\u002Frunnable-shapes.md` when you need to confirm whether a concept is launchable, look up the exact `main` predicate or `compileInMPS` gate, or interpret a \"not runnable through this tool\" \u002F \"compileInMPS=false\" refusal.\n- Open `references\u002Fcreate-and-execute.md` when you need the exact `mps_mcp_create_run_configuration` \u002F `execute_run_configuration` \u002F `get_run_configurations` call shape, naming and replacement semantics, or the difference between MPS MCP and IDEA MCP variants.\n- Open `references\u002Fclassconcept-and-fallbacks.md` when a `ClassConcept` run path doesn't fire — `compileInMPS=false`, missing `main`, ambiguous duplicates — and you need the IDEA MCP file-path fallback or the persisted-XML structure of the node-aware Java Application config.\n- Open `references\u002Fcompile-before-run.md` when the run fails with `ClassNotFoundException`, you're deciding between module MAKE and model MAKE, or output disagrees with edited source.\n- Open `references\u002Fdecision-matrix.md` for the at-a-glance situation→approach table covering every supported launch path.\n- Open `references\u002Fcommon-failures.md` for the symptom→cause→fix table covering every published error and its remediation.\n",{"data":33,"body":35},{"name":4,"description":6,"type":34},"reference",{"type":36,"children":37},"root",[38,47,110,117,390,396,401,506,511,517,576,582],{"type":39,"tag":40,"props":41,"children":43},"element","h1",{"id":42},"running-mps-root-nodes",[44],{"type":45,"value":46},"text","Running MPS Root Nodes",{"type":39,"tag":48,"props":49,"children":50},"p",{},[51,53,60,62,68,70,76,78,84,86,92,94,100,102,108],{"type":45,"value":52},"This skill covers the path from \"an MPS root node exists in a model\" to \"a green IDE run \u002F red stack trace in my hand,\" using only MCP tools. It targets user-level artifacts (DSL ",{"type":39,"tag":54,"props":55,"children":57},"code",{"className":56},[],[58],{"type":45,"value":59},"main",{"type":45,"value":61},"-like roots, plain ",{"type":39,"tag":54,"props":63,"children":65},{"className":64},[],[66],{"type":45,"value":67},"ClassConcept",{"type":45,"value":69}," mains, test cases) — ",{"type":39,"tag":71,"props":72,"children":73},"strong",{},[74],{"type":45,"value":75},"not",{"type":45,"value":77}," launching MPS itself (the ",{"type":39,"tag":54,"props":79,"children":81},{"className":80},[],[82],{"type":45,"value":83},"MPS",{"type":45,"value":85}," \u002F ",{"type":39,"tag":54,"props":87,"children":89},{"className":88},[],[90],{"type":45,"value":91},"MPS (2nd inst.)",{"type":45,"value":93}," configs are a different topic, see ",{"type":39,"tag":54,"props":95,"children":97},{"className":96},[],[98],{"type":45,"value":99},"AGENTS.md",{"type":45,"value":101}," or ",{"type":39,"tag":54,"props":103,"children":105},{"className":104},[],[106],{"type":45,"value":107},"CLAUDE.md",{"type":45,"value":109},").",{"type":39,"tag":111,"props":112,"children":114},"h2",{"id":113},"critical-directives",[115],{"type":45,"value":116},"Critical Directives",{"type":39,"tag":118,"props":119,"children":120},"ul",{},[121,141,195,244,270,296,320,365],{"type":39,"tag":122,"props":123,"children":124},"li",{},[125,131,133,139],{"type":39,"tag":54,"props":126,"children":128},{"className":127},[],[129],{"type":45,"value":130},"execute_run_configuration",{"type":45,"value":132}," and ",{"type":39,"tag":54,"props":134,"children":136},{"className":135},[],[137],{"type":45,"value":138},"get_run_configurations",{"type":45,"value":140}," are provided both by MPS and IDEA. Use the ones provided by MPS for running MPS nodes\u002Ftests.",{"type":39,"tag":122,"props":142,"children":143},{},[144,155,157,163,165,171,173,178,180,185,187,193],{"type":39,"tag":71,"props":145,"children":146},{},[147,153],{"type":39,"tag":54,"props":148,"children":150},{"className":149},[],[151],{"type":45,"value":152},"mps_mcp_create_run_configuration",{"type":45,"value":154}," accepts root nodes only",{"type":45,"value":156},", and only three shapes: implements ",{"type":39,"tag":54,"props":158,"children":160},{"className":159},[],[161],{"type":45,"value":162},"IMainClass",{"type":45,"value":164},", implements ",{"type":39,"tag":54,"props":166,"children":168},{"className":167},[],[169],{"type":45,"value":170},"ITestCase",{"type":45,"value":172},", or is a ",{"type":39,"tag":54,"props":174,"children":176},{"className":175},[],[177],{"type":45,"value":67},{"type":45,"value":179}," with a qualifying static ",{"type":39,"tag":54,"props":181,"children":183},{"className":182},[],[184],{"type":45,"value":59},{"type":45,"value":186},". Pointing it at a method body or other non-root yields the non-root rejection. See ",{"type":39,"tag":54,"props":188,"children":190},{"className":189},[],[191],{"type":45,"value":192},"references\u002Frunnable-shapes.md",{"type":45,"value":194}," for the exact predicate and producer precedence.",{"type":39,"tag":122,"props":196,"children":197},{},[198,211,213,219,221,227,229,234,236,242],{"type":39,"tag":71,"props":199,"children":200},{},[201,203,209],{"type":45,"value":202},"MAKE the ",{"type":39,"tag":204,"props":205,"children":206},"em",{},[207],{"type":45,"value":208},"module",{"type":45,"value":210},", not just the model, before running.",{"type":45,"value":212}," Model MAKE regenerates ",{"type":39,"tag":54,"props":214,"children":216},{"className":215},[],[217],{"type":45,"value":218},"source_gen",{"type":45,"value":220}," but does not always compile into ",{"type":39,"tag":54,"props":222,"children":224},{"className":223},[],[225],{"type":45,"value":226},"classes_gen",{"type":45,"value":228},"; running launches bytecode, so a stale ",{"type":39,"tag":54,"props":230,"children":232},{"className":231},[],[233],{"type":45,"value":226},{"type":45,"value":235}," silently runs old code. See ",{"type":39,"tag":54,"props":237,"children":239},{"className":238},[],[240],{"type":45,"value":241},"references\u002Fcompile-before-run.md",{"type":45,"value":243},".",{"type":39,"tag":122,"props":245,"children":246},{},[247,260,262,268],{"type":39,"tag":71,"props":248,"children":249},{},[250,252,258],{"type":45,"value":251},"Keep ",{"type":39,"tag":54,"props":253,"children":255},{"className":254},[],[256],{"type":45,"value":257},"configurationName",{"type":45,"value":259}," stable across iterations.",{"type":45,"value":261}," The tool replaces the existing config of the same ",{"type":39,"tag":54,"props":263,"children":265},{"className":264},[],[266],{"type":45,"value":267},"\u003Ctype>.\u003Cname>",{"type":45,"value":269}," rather than creating duplicates — idempotent setup is the goal. Use distinct names only when you actually want parallel configs.",{"type":39,"tag":122,"props":271,"children":272},{},[273,286,288,294],{"type":39,"tag":71,"props":274,"children":275},{},[276,278,284],{"type":45,"value":277},"Do not silently flip ",{"type":39,"tag":54,"props":279,"children":281},{"className":280},[],[282],{"type":45,"value":283},"compileInMPS=false",{"type":45,"value":285}," to true.",{"type":45,"value":287}," ",{"type":39,"tag":54,"props":289,"children":291},{"className":290},[],[292],{"type":45,"value":293},"Compile.None",{"type":45,"value":295}," and JPS-compile settings are usually intentional (sandbox modules, externally-built modules, packaged libraries). Confirm with the user; otherwise take the IDEA MCP file-path fallback.",{"type":39,"tag":122,"props":297,"children":298},{},[299,304,306,311,313,318],{"type":39,"tag":71,"props":300,"children":301},{},[302],{"type":45,"value":303},"Prefer the source-root path over generated-Java entry points.",{"type":45,"value":305}," Source-root configs survive regeneration; file-path configs against ",{"type":39,"tag":54,"props":307,"children":309},{"className":308},[],[310],{"type":45,"value":218},{"type":45,"value":312}," only work while ",{"type":39,"tag":54,"props":314,"children":316},{"className":315},[],[317],{"type":45,"value":226},{"type":45,"value":319}," is fresh.",{"type":39,"tag":122,"props":321,"children":322},{},[323,347,349,355,357,363],{"type":39,"tag":71,"props":324,"children":325},{},[326,328,333,334,339,341,346],{"type":45,"value":327},"MPS MCP ",{"type":39,"tag":54,"props":329,"children":331},{"className":330},[],[332],{"type":45,"value":130},{"type":45,"value":85},{"type":39,"tag":54,"props":335,"children":337},{"className":336},[],[338],{"type":45,"value":138},{"type":45,"value":340}," do not surface run points under ",{"type":39,"tag":54,"props":342,"children":344},{"className":343},[],[345],{"type":45,"value":218},{"type":45,"value":243},{"type":45,"value":348}," Use the IDEA MCP variants when you need a ",{"type":39,"tag":54,"props":350,"children":352},{"className":351},[],[353],{"type":45,"value":354},"filePath",{"type":45,"value":356},"+",{"type":39,"tag":54,"props":358,"children":360},{"className":359},[],[361],{"type":45,"value":362},"line",{"type":45,"value":364}," launcher for generated Java.",{"type":39,"tag":122,"props":366,"children":367},{},[368,373,375,381,383,388],{"type":39,"tag":71,"props":369,"children":370},{},[371],{"type":45,"value":372},"Reuse before you create.",{"type":45,"value":374}," If the user already has a working run config, prefer ",{"type":39,"tag":54,"props":376,"children":378},{"className":377},[],[379],{"type":45,"value":380},"get_run_configurations()",{"type":45,"value":382}," + ",{"type":39,"tag":54,"props":384,"children":386},{"className":385},[],[387],{"type":45,"value":130},{"type":45,"value":389}," by its existing name — duplicates are pointless.",{"type":39,"tag":111,"props":391,"children":393},{"id":392},"common-workflow",[394],{"type":45,"value":395},"Common Workflow",{"type":39,"tag":48,"props":397,"children":398},{},[399],{"type":45,"value":400},"End-to-end pattern for \"I changed a DSL root, run it\":",{"type":39,"tag":402,"props":403,"children":404},"ol",{},[405,429,461,486],{"type":39,"tag":122,"props":406,"children":407},{},[408,414,416,420,422,428],{"type":39,"tag":54,"props":409,"children":411},{"className":410},[],[412],{"type":45,"value":413},"mps_mcp_alter_nodes MAKE",{"type":45,"value":415}," on the ",{"type":39,"tag":71,"props":417,"children":418},{},[419],{"type":45,"value":208},{"type":45,"value":421}," of the DSL root, ",{"type":39,"tag":54,"props":423,"children":425},{"className":424},[],[426],{"type":45,"value":427},"rebuild: true",{"type":45,"value":243},{"type":39,"tag":122,"props":430,"children":431},{},[432,437,439,444,446,451,453,459],{"type":39,"tag":54,"props":433,"children":435},{"className":434},[],[436],{"type":45,"value":152},{"type":45,"value":438}," on the DSL root with a stable ",{"type":39,"tag":54,"props":440,"children":442},{"className":441},[],[443],{"type":45,"value":257},{"type":45,"value":445}," (the generated class FQN is a good default for IMainClass; leave blank for ",{"type":39,"tag":54,"props":447,"children":449},{"className":448},[],[450],{"type":45,"value":67},{"type":45,"value":452}," to match the IDE gutter's ",{"type":39,"tag":54,"props":454,"children":456},{"className":455},[],[457],{"type":45,"value":458},"Class \u003CClassName>",{"type":45,"value":460}," default).",{"type":39,"tag":122,"props":462,"children":463},{},[464,469,471,477,479,485],{"type":39,"tag":54,"props":465,"children":467},{"className":466},[],[468],{"type":45,"value":130},{"type":45,"value":470}," (of MPS MCP, not IDEA's) by name with ",{"type":39,"tag":54,"props":472,"children":474},{"className":473},[],[475],{"type":45,"value":476},"waitForExit: true",{"type":45,"value":478}," and a generous ",{"type":39,"tag":54,"props":480,"children":482},{"className":481},[],[483],{"type":45,"value":484},"timeout",{"type":45,"value":243},{"type":39,"tag":122,"props":487,"children":488},{},[489,491,497,499,504],{"type":45,"value":490},"On ",{"type":39,"tag":54,"props":492,"children":494},{"className":493},[],[495],{"type":45,"value":496},"Could not find or load main class",{"type":45,"value":498},", step 1 didn't reach ",{"type":39,"tag":54,"props":500,"children":502},{"className":501},[],[503],{"type":45,"value":226},{"type":45,"value":505}," — re-run it.",{"type":39,"tag":48,"props":507,"children":508},{},[509],{"type":45,"value":510},"Keep the configuration name stable across iterations so step 2 idempotently overwrites itself rather than littering the IDE with duplicates.",{"type":39,"tag":111,"props":512,"children":514},{"id":513},"related-skills",[515],{"type":45,"value":516},"Related Skills",{"type":39,"tag":118,"props":518,"children":519},{},[520,548,562],{"type":39,"tag":122,"props":521,"children":522},{},[523,532,534,539,541,546],{"type":39,"tag":71,"props":524,"children":525},{},[526],{"type":39,"tag":54,"props":527,"children":529},{"className":528},[],[530],{"type":45,"value":531},"mps-baselanguage",{"type":45,"value":533}," — when the runnable root is a plain ",{"type":39,"tag":54,"props":535,"children":537},{"className":536},[],[538],{"type":45,"value":67},{"type":45,"value":540}," you authored or need to inspect (",{"type":39,"tag":54,"props":542,"children":544},{"className":543},[],[545],{"type":45,"value":59},{"type":45,"value":547}," method shape, BaseLanguage editing).",{"type":39,"tag":122,"props":549,"children":550},{},[551,560],{"type":39,"tag":71,"props":552,"children":553},{},[554],{"type":39,"tag":54,"props":555,"children":557},{"className":556},[],[558],{"type":45,"value":559},"mps-aspect-generator",{"type":45,"value":561}," — when stale or wrong generated Java is the root cause of an execution failure.",{"type":39,"tag":122,"props":563,"children":564},{},[565,574],{"type":39,"tag":71,"props":566,"children":567},{},[568],{"type":39,"tag":54,"props":569,"children":571},{"className":570},[],[572],{"type":45,"value":573},"mps-bugfix",{"type":45,"value":575}," — when an execution failure points back at the generator or model rather than the launcher.",{"type":39,"tag":111,"props":577,"children":579},{"id":578},"reference-index",[580],{"type":45,"value":581},"Reference Index",{"type":39,"tag":118,"props":583,"children":584},{},[585,612,643,676,695,707],{"type":39,"tag":122,"props":586,"children":587},{},[588,590,595,597,602,604,610],{"type":45,"value":589},"Open ",{"type":39,"tag":54,"props":591,"children":593},{"className":592},[],[594],{"type":45,"value":192},{"type":45,"value":596}," when you need to confirm whether a concept is launchable, look up the exact ",{"type":39,"tag":54,"props":598,"children":600},{"className":599},[],[601],{"type":45,"value":59},{"type":45,"value":603}," predicate or ",{"type":39,"tag":54,"props":605,"children":607},{"className":606},[],[608],{"type":45,"value":609},"compileInMPS",{"type":45,"value":611}," gate, or interpret a \"not runnable through this tool\" \u002F \"compileInMPS=false\" refusal.",{"type":39,"tag":122,"props":613,"children":614},{},[615,616,622,624,629,630,635,636,641],{"type":45,"value":589},{"type":39,"tag":54,"props":617,"children":619},{"className":618},[],[620],{"type":45,"value":621},"references\u002Fcreate-and-execute.md",{"type":45,"value":623}," when you need the exact ",{"type":39,"tag":54,"props":625,"children":627},{"className":626},[],[628],{"type":45,"value":152},{"type":45,"value":85},{"type":39,"tag":54,"props":631,"children":633},{"className":632},[],[634],{"type":45,"value":130},{"type":45,"value":85},{"type":39,"tag":54,"props":637,"children":639},{"className":638},[],[640],{"type":45,"value":138},{"type":45,"value":642}," call shape, naming and replacement semantics, or the difference between MPS MCP and IDEA MCP variants.",{"type":39,"tag":122,"props":644,"children":645},{},[646,647,653,655,660,662,667,669,674],{"type":45,"value":589},{"type":39,"tag":54,"props":648,"children":650},{"className":649},[],[651],{"type":45,"value":652},"references\u002Fclassconcept-and-fallbacks.md",{"type":45,"value":654}," when a ",{"type":39,"tag":54,"props":656,"children":658},{"className":657},[],[659],{"type":45,"value":67},{"type":45,"value":661}," run path doesn't fire — ",{"type":39,"tag":54,"props":663,"children":665},{"className":664},[],[666],{"type":45,"value":283},{"type":45,"value":668},", missing ",{"type":39,"tag":54,"props":670,"children":672},{"className":671},[],[673],{"type":45,"value":59},{"type":45,"value":675},", ambiguous duplicates — and you need the IDEA MCP file-path fallback or the persisted-XML structure of the node-aware Java Application config.",{"type":39,"tag":122,"props":677,"children":678},{},[679,680,685,687,693],{"type":45,"value":589},{"type":39,"tag":54,"props":681,"children":683},{"className":682},[],[684],{"type":45,"value":241},{"type":45,"value":686}," when the run fails with ",{"type":39,"tag":54,"props":688,"children":690},{"className":689},[],[691],{"type":45,"value":692},"ClassNotFoundException",{"type":45,"value":694},", you're deciding between module MAKE and model MAKE, or output disagrees with edited source.",{"type":39,"tag":122,"props":696,"children":697},{},[698,699,705],{"type":45,"value":589},{"type":39,"tag":54,"props":700,"children":702},{"className":701},[],[703],{"type":45,"value":704},"references\u002Fdecision-matrix.md",{"type":45,"value":706}," for the at-a-glance situation→approach table covering every supported launch path.",{"type":39,"tag":122,"props":708,"children":709},{},[710,711,717],{"type":45,"value":589},{"type":39,"tag":54,"props":712,"children":714},{"className":713},[],[715],{"type":45,"value":716},"references\u002Fcommon-failures.md",{"type":45,"value":718}," for the symptom→cause→fix table covering every published error and its remediation.",{"items":720,"total":798},[721,737,746,755,766,776,789],{"slug":722,"name":722,"fn":723,"description":724,"org":725,"tags":726,"stars":19,"repoUrl":20,"updatedAt":736},"mps-aspect-accessories","configure JetBrains MPS module dependencies","Wire MPS module and model dependencies, used languages, used devkits, extended languages, runtime solutions, accessory models, and language\u002Fdependency versions. 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},[727,730,733],{"name":728,"slug":729,"type":15},"Architecture","architecture",{"name":731,"slug":732,"type":15},"Configuration","configuration",{"name":734,"slug":735,"type":15},"Engineering","engineering","2026-07-17T06:06:57.311661",{"slug":738,"name":738,"fn":739,"description":740,"org":741,"tags":742,"stars":19,"repoUrl":20,"updatedAt":745},"mps-aspect-actions","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. Reach for this skill when a substitution, side transform, completion replacement, or `add new initialized(...)` should preserve fields from the node it is replacing, or when defaults set in a constructor are not enough.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[743,744],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},"2026-07-17T06:04:48.066901",{"slug":747,"name":747,"fn":748,"description":749,"org":750,"tags":751,"stars":19,"repoUrl":20,"updatedAt":754},"mps-aspect-behavior","define and edit MPS concept behavior","Use when defining or editing MPS `ConceptBehavior` — per-concept methods (non-virtual \u002F virtual \u002F abstract \u002F static \u002F virtual static), constructors, virtual dispatch (MRO), super and interface-default calls (`super\u003CInterface>.method`), overriding methods from `lang.core.behavior` interfaces such as `ScopeProvider.getScope` \u002F `INamedConcept.getName` \u002F `BaseConcept.getPresentation`, calling sibling methods (`LocalBehaviorMethodCall`) and behavior methods from other aspects via `node.method(...)`. Reach for this skill whenever the task involves authoring or modifying `\u003Clang>\u002FlanguageModels\u002Fbehavior.mps`.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[752,753],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},"2026-07-13T06:45:21.757084",{"slug":756,"name":756,"fn":757,"description":758,"org":759,"tags":760,"stars":19,"repoUrl":20,"updatedAt":765},"mps-aspect-constraints","define JetBrains MPS language constraints","Use when defining or editing MPS language constraints — property validators \u002F setters \u002F getters, referent search scopes (imperative or inherited via `ScopeProvider.getScope`), `referentSetHandler` side effects, default-scope blocks, `canBeChild` \u002F `canBeParent` \u002F `canBeAncestor` \u002F `canBeRoot` placement rules, `defaultConcreteConcept` for abstract concepts, `set \u003Cread-only>` and `{name}` aliasing, and scope helpers (`SimpleRoleScope`, `ListScope`, `CompositeScope`, `HidingByNameScope`). Reach for this skill whenever the task involves authoring or modifying `\u003Clang>\u002FlanguageModels\u002Fconstraints.mps`.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[761,762],{"name":728,"slug":729,"type":15},{"name":763,"slug":764,"type":15},"Code Analysis","code-analysis","2026-07-23T05:41:33.639365",{"slug":767,"name":767,"fn":768,"description":769,"org":770,"tags":771,"stars":19,"repoUrl":20,"updatedAt":775},"mps-aspect-dataflow","define and debug MPS dataflow builders","Use when defining or debugging MPS dataflow builders for a concept — control\u002Fdata flow declarations that drive reachability analysis and variable-use checking. 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},[772],{"name":773,"slug":774,"type":15},"Data Analysis","data-analysis","2026-07-13T06:45:19.114674",{"slug":777,"name":777,"fn":778,"description":779,"org":780,"tags":781,"stars":19,"repoUrl":20,"updatedAt":788},"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`). Covers `jetbrains.mps.lang.editor` cell models (`CellModel_RefNode`\u002F`CellModel_RefNodeList`\u002F`CellModel_RefCell`\u002F`CellModel_Property`\u002F`CellModel_Constant`), layout choices, and JSON blueprints for common editor shapes. For the non-layout side (action maps, keymaps, transformation\u002Fsubstitute menus) use `mps-aspect-editor-menus-and-keymaps`.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[782,785],{"name":783,"slug":784,"type":15},"Design","design",{"name":786,"slug":787,"type":15},"UI Components","ui-components","2026-07-23T05:41:56.638151",{"slug":790,"name":790,"fn":791,"description":792,"org":793,"tags":794,"stars":19,"repoUrl":20,"updatedAt":797},"mps-aspect-editor-menus-and-keymaps","author MPS editor menus and keymaps","Use when authoring the **non-layout** parts of the MPS editor aspect — what happens when the user types, presses a key, triggers completion, pastes, or invokes a context action. 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},[795,796],{"name":734,"slug":735,"type":15},{"name":786,"slug":787,"type":15},"2026-07-23T05:41:49.666535",31,{"items":800,"total":886},[801,807,812,817,822,826,831,836,845,854,863,876],{"slug":722,"name":722,"fn":723,"description":724,"org":802,"tags":803,"stars":19,"repoUrl":20,"updatedAt":736},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[804,805,806],{"name":728,"slug":729,"type":15},{"name":731,"slug":732,"type":15},{"name":734,"slug":735,"type":15},{"slug":738,"name":738,"fn":739,"description":740,"org":808,"tags":809,"stars":19,"repoUrl":20,"updatedAt":745},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[810,811],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},{"slug":747,"name":747,"fn":748,"description":749,"org":813,"tags":814,"stars":19,"repoUrl":20,"updatedAt":754},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[815,816],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},{"slug":756,"name":756,"fn":757,"description":758,"org":818,"tags":819,"stars":19,"repoUrl":20,"updatedAt":765},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[820,821],{"name":728,"slug":729,"type":15},{"name":763,"slug":764,"type":15},{"slug":767,"name":767,"fn":768,"description":769,"org":823,"tags":824,"stars":19,"repoUrl":20,"updatedAt":775},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[825],{"name":773,"slug":774,"type":15},{"slug":777,"name":777,"fn":778,"description":779,"org":827,"tags":828,"stars":19,"repoUrl":20,"updatedAt":788},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[829,830],{"name":783,"slug":784,"type":15},{"name":786,"slug":787,"type":15},{"slug":790,"name":790,"fn":791,"description":792,"org":832,"tags":833,"stars":19,"repoUrl":20,"updatedAt":797},{"slug":8,"name":9,"logoUrl":10,"githubOrg":9},[834,835],{"name":734,"slug":735,"type":15},{"name":786,"slug":787,"type":15},{"slug":837,"name":837,"fn":838,"description":839,"org":840,"tags":841,"stars":19,"repoUrl":20,"updatedAt":844},"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},[842,843],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},"2026-07-13T06:44:59.507855",{"slug":559,"name":559,"fn":846,"description":847,"org":848,"tags":849,"stars":19,"repoUrl":20,"updatedAt":853},"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},[850,851,852],{"name":728,"slug":729,"type":15},{"name":763,"slug":764,"type":15},{"name":734,"slug":735,"type":15},"2026-07-17T06:06:58.042999",{"slug":855,"name":855,"fn":856,"description":857,"org":858,"tags":859,"stars":19,"repoUrl":20,"updatedAt":862},"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},[860,861],{"name":728,"slug":729,"type":15},{"name":734,"slug":735,"type":15},"2026-07-23T05:41:48.692899",{"slug":864,"name":864,"fn":865,"description":866,"org":867,"tags":868,"stars":19,"repoUrl":20,"updatedAt":875},"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},[869,872],{"name":870,"slug":871,"type":15},"Debugging","debugging",{"name":873,"slug":874,"type":15},"Migration","migration","2026-07-13T06:45:20.372122",{"slug":877,"name":877,"fn":878,"description":879,"org":880,"tags":881,"stars":19,"repoUrl":20,"updatedAt":885},"mps-aspect-structure-concepts","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},[882],{"name":883,"slug":884,"type":15},"Data Modeling","data-modeling","2026-07-23T05:41:30.705975",188]