Viking Recommend

When to Use

Use this skill for:

• recommendation runtime checks
• V2 recommend scene inspection, creation, publishing, deletion, and deployment verification
• V2 recommend rule inspection and management
• diagnosing whether bad recommendation results come from scene config, behavior-scene binding, user context, parent/item context, data readiness, or online config propagation
• separating persistent scene defaults from request-only runtime parameters

If the user asks a general product/API/auth/pricing question rather than a recommend workflow action, temporarily hand off to vs-product-qa and return here only after the grounded product answer is complete.

Version Check

Before starting this skill workflow, run vs version check --json. Continue only when status is up-to-date. If status is update-available, stop and tell the user to update the cloned vs repository, then run git pull --ff-only, bash ./scripts/install.sh, and bash ./scripts/install-skills.sh all --target auto --force (PowerShell: scripts/install.ps1 and scripts/install-skills.ps1). If the status is unknown, stop and report that the CLI version could not be verified.

Preconditions

• an application-id is available
• runtime checks need a scene-id and usually at least one of user-id, parent-id, or shopping-cart item context
• scene creation needs an item dataset bound to the application and at least one behavior scene value from the bound UserEvent dataset; when the value is not explicit, resolve it with vs dataset get --id <user-event-dataset-id> --full from the UserEvent schema field whose business attribute is UserEventScene
• if the scene does not exist yet, inspect the existing scene list first and only create a new scene when reuse is not possible
• the agent should treat the installed CLI behavior as authoritative when help text, skill text, and runtime behavior disagree

Scope

Before changing anything, decide whether the user wants:

• a temporary runtime verification with vs recommend run
• a persistent V2 recommend scene publish
• a new V2 recommend scene for a target page or module
• a reusable V2 recommend rule change
• a readiness, binding, or online-config diagnosis for a failing recommendation app

This skill stays at the recommendation workflow level. Do not embed low-level API field mappings, payload design, or enum interpretation here. When a concrete command needs exact parameters, first consult vs-product-qa and the matching API reference. For recommend scene update, the authoritative update contract is PublishRecommendSceneV2.

V2 API Semantics

Recommend scene and rule commands now use the V2 OpenAPI surface.

• recommend scene create -> CreateRecommendSceneV2
• recommend scene list -> ListRecommendScenesV2
• recommend scene get -> GetRecommendSceneV2
• recommend scene update -> PublishRecommendSceneV2
• recommend scene delete -> DeleteRecommendSceneV2
• recommend rule list -> ListRecommendRulesV2
• recommend rule get -> GetRecommendRuleV2
• recommend rule upsert -> UpsertRecommendRuleV2
• recommend rule delete -> DeleteRecommendRuleV2

V2 naming differences:

• request IDs use ApplicationId, SceneId, RuleId, DatasetId, ItemDatasetId
• behavior-scene binding is UserEventScenes[]; use --user-event-scenes
• RecommendModel is a string: default or long_sequence
• RecommendOptimizationTarget is a string: ctr or empty
• create/publish/delete/upsert write APIs support DryRun
• scene lists return Scenes[]; rule lists return Rules[]
• rule type values are snake_case in V2, for example user_interest, item_cf, force_item, boost_bury_cond, cold_start, rec_reason

Deployment Semantics

Recommend scene deployment is not just a row update.

• recommend scene update calls PublishRecommendSceneV2. The backend validates the scene, persists the updated scene/config/rule bindings, generates online recommendation metadata, writes runtime config, and marks the scene as published.
• Standard-model scene creation with an item dataset can synchronously deploy through the same online path. Long-sequence scene creation submits an async workflow; treat SceneConfigPhase / Status as part of the deployment state.
• Online deployment writes generated recommend_scene_meta under the scene namespace in ConfigCenter; DTS then syncs it to the online runtime store used by rec-retriever.
• Deployment also updates application-level behavior-scene mapping under event_scene_mapping: it stores scene-id -> selected UserEventScenes[]. This is the selected binding, not the full list of possible event_scene values.
• Deployment updates deduplication/invert configs when impression/exposure dedupe is enabled.
• GetRecommendSceneExpConfigV2 is a preview/experience-config helper and is not a public CLI/OpenAPI workflow.

Important difference from search scenes: SearchSceneV2 supports partial Config publish semantics. Recommend PublishRecommendSceneV2 should be treated as a full scene publish. Build update payloads from the current vs recommend scene get response and preserve unrelated config areas unless the user explicitly asks to replace them. When using the CLI, --config and advanced flags are merged over the readback at the first Config level; if changing a nested field, provide the full updated first-level object.

Commands

• vs recommend run: send a production-style recommendation request
• vs recommend scene create / vs recommend scene list / vs recommend scene get: manage V2 recommend scenes
• vs recommend scene update: publish V2 recommend scene metadata and RecommendSceneConfigV2
• vs recommend scene delete: delete and undeploy a recommend scene
• vs recommend rule list / vs recommend rule get: inspect V2 reusable recommend rules
• vs recommend rule upsert / vs recommend rule delete: create, update, or delete V2 reusable recommend rules
• vs dataset get --full: inspect item/UserEvent schema, enum metadata, and exact field casing
• vs app dataset-config get --full: inspect app-bound dataset field config when a non-workflow diagnostic explicitly needs app-level config
• vs app status / vs app diagnose: inspect readiness before blaming runtime results

Workflow

1. Start by determining whether the user wants:
   • a runtime recommendation check
   • a persistent recommend scene publish
   • a new recommend scene
   • a reusable recommend rule change
   • a readiness, behavior-scene binding, or online-config diagnosis
2. Before running any concrete command, consult vs-product-qa to confirm the current command behavior and exact parameter requirements.
3. For runtime checks, use vs recommend run first, then inspect result.rec_results, extra_info, recall info, boost status, diversity status, and invalid parent items from the raw response.
4. For natural-language scene-change requests, use references/recommend-scene-natural-language-routing.md to identify the target V2 field, config area, deployment check, or rule-resource workflow before running resource-specific read/write commands such as vs dataset get, vs recommend rule list/get/upsert/delete, or vs recommend scene update.
5. For persistent changes to an existing scene, run the selected workflow's first vs recommend scene get --application-id <application-id> --scene-id <scene-id> step before any later schema, dataset, rule, or publish command. Treat the readback as the base payload for a full publish; first-level Config sections may be replaced, but nested field edits require a full updated first-level section.
6. Before building a recommend scene create or recommend scene update payload, consult the matching V2 API reference. The routing reference identifies where to edit; it is not sufficient for final payload values.
7. Before creating or updating a recommend scene, resolve the target page/module and the required UserEventScenes. For real writes, pass --confirm-entry-binding.
8. Resolve dataset facts before writing:
   • use vs dataset get --id <user-event-dataset-id> --full to inspect event_scene and event_type enum values; for event_scene, find the schema field whose business attribute is UserEventScene and read EnumerateMeta[].EnumerateValue
   • use vs dataset get --id <item-dataset-id> --full for exact item field casing and filterable fields
9. For rule-resource changes, follow the concrete command sequence in references/recommend-scene-natural-language-routing.md; do not replace a required vs recommend rule get step with vs recommend rule list, or replace a required vs recommend scene get step with vs recommend scene list.
10. After every scene mutation, immediately read the scene back with vs recommend scene get --application-id <application-id> --scene-id <scene-id> and verify that the intended persistent fields are visible.
11. When deployment matters, run a runtime check with vs recommend run after readback. If results do not reflect the update, inspect readiness/status and propagation before changing config again.
12. If command behavior conflicts with the skill text or --help, trust the installed CLI behavior first, and only then inspect repository code when needed to explain or fix the gap.

References

• references/recommend-scene-natural-language-routing.md: workflow-oriented mapping from natural-language recommend-scene requests to the first V2 config area, scene field, deployment check, or rule-resource workflow you should inspect
• ../vs-product-qa/references/api-references/control-plane/scene/CreateRecommendSceneV2.md: authoritative V2 recommend-scene creation fields, enum values, and behavior-event constraints
• ../vs-product-qa/references/api-references/control-plane/scene/PublishRecommendSceneV2.md: authoritative V2 recommend-scene publish payload, Config fields, enum-like string values, and validation notes
• ../vs-product-qa/references/api-references/control-plane/scene/GetRecommendSceneV2.md: authoritative V2 recommend-scene readback shape
• ../vs-product-qa/references/api-references/control-plane/scene/UpsertRecommendRuleV2.md: authoritative V2 reusable recommend-rule upsert payload and rule type values
• ../vs-product-qa/references/api-references/data-plane/online-api/Recommend.md: authoritative online recommendation request and response contract for vs recommend run

Customer Environment Principle

• In customer environments, assume repository source code is unavailable.
• Execute tasks using only the installed skills, the packaged vs CLI surface (--help, command output, and observed runtime behavior), and explicit user-provided information.
• Do not rely on reading local repository source files, generated repo snapshots, or implementation details to decide runtime actions.
• If the installed CLI behavior conflicts with a skill, trust the installed CLI behavior first.
• If the skills and the packaged CLI still do not provide enough information to proceed safely, stop and ask the user instead of searching source code.

Constraints

• Before executing any concrete vs ... command in this recommend workflow, first consult vs-product-qa to verify the current command surface, required flags, payload fields, input format, and allowed values. Only after that check may you finalize parameters and run the command.
• Numbered workflows in references/recommend-scene-natural-language-routing.md are ordered command sequences. Execute their required vs ... commands serially in the documented order; do not parallelize, reorder, or replace required read commands with list-style alternatives unless the workflow explicitly says the step is optional.
• The first resource command in a numbered workflow is mandatory even when IDs are already available from test context or user input. Do not run later dataset/schema/rule reads before earlier vs recommend scene get steps; use the scene readback as the authoritative source for scene-bound IDs such as ItemDatasetId.
• When a numbered rule-attachment workflow creates a reusable rule with vs recommend rule upsert and then lists vs recommend rule get, the rule readback is a required in-flow validation step to explicitly confirm the rule was created successfully before continuing to the next numbered step.
• Before building a recommend scene create or recommend scene update payload, consult the matching V2 API reference. The routing reference only identifies the config area; it is not sufficient for final payload values.
• Recommend scene update is a full publish workflow. Start from vs recommend scene get, carry forward top-level fields and existing Config, then modify only the requested area. The CLI may accept first-level Config patches and merge them over readback; do not send or recommend tiny nested patches such as only RecAssistantConfig.AnswerStyle.
• When the user request includes a scene type, model, optimization, strategy, channel, or mode qualifier such as for_you, related, shopping_cart, long_sequence, ctr, custom merge, cold_start, item_similarity, always, boost, or bury, do not treat enabling the feature as sufficient. Set the corresponding field explicitly and verify that exact value in the readback response.
• Parent/variant recommendation scope is supported on both recommend scene create and recommend scene update through --item-type-result variant|parent. The CLI writes Config.FilterConfig.ItemTypeFilter; --item-type-field overrides the ItemType field name and defaults to item_type.
• Field name case sensitivity: All item dataset field names used in recommendation filters, ShuffleConfig.Rules[].FieldName, ShuffleConfig.Rules[].ShuffleExpression.field, BoostBuryCondConfig.Rules[].Config.field, ColdStartConfig.ItemFilter.field, FilterConfig.ItemTypeFilter.Filter.field, and rule Config are case-sensitive. Before writing any field name into config, first complete any earlier vs recommend scene get step required by the selected workflow, then run vs dataset get --id <item-dataset-id> --full with the dataset ID from that readback and copy the field name exactly as it appears there. If the field name does not match the schema, stop and ask the user to confirm which field they mean instead of guessing.
• UserEventScenes[] values must come from the bound UserEvent dataset's event_scene enum values. In console, the dropdown is populated from the UserEvent schema field whose business attribute is UserEventScene, using EnumerateMeta[].EnumerateValue returned by GetDataset; mirror that with vs dataset get --id <user-event-dataset-id> --full. ClickEventTypes[], PositiveEventTypes[], and NegativeEventTypes[] values must come from that dataset's event_type enum values.
• event_scene option discovery is read-time metadata: vs dataset get --id <user-event-dataset-id> --full returns schema enum metadata plus offline-received event_scene values when available. Do not assume those candidate values are written to scene config until the user selects them and publishes the scene.
• FilterConfig.ItemTypeFilter is schema-dependent: it is required when the item dataset has an ItemType business attribute, invalid when the dataset has no ItemType business attribute, and requires the paired ParentId business attribute plus a filterable ItemType field. It is independent from reusable item filtering and should not be modeled as Config.FilterRuleId.
• For cold-start item-field filtering, first run vs dataset get --id <item-dataset-id> --full, use ItemConditionType="custom_filter" with a non-empty ItemFilter whose field names exactly match filterable schema fields, and submit the complete first-level ColdStartConfig object. Do not combine custom_filter with an import-time condition or send only a nested ItemFilter patch.
• ColdStartConfig.ItemFilter uses the console item-filter DSL directly. For a single equality condition such as category = 短袖, send exactly {"field":"category","op":"must","conds":["短袖"]}. Do not wrap a single condition in {"op":"and","conds":[...]}, and do not use condition-tree operators such as {"field":"category","op":"eq","value":"短袖"}. Console maps = / == and in to op:"must"; it maps != and not_in to op:"must_not"; range comparisons use op:"range" with gt/gte/lt/lte.
• When configuring ReasonTemplateConfig, every enabled template must include an explicit non-null Variables[] array derived from the template and recall channel. Use ["rank"] for hot_item, ["category"] for user_profile, de-duplicated item.* placeholders for item_cf/item_similarity, and [] for channels with no variables. If any requested template contains {{item.<field_path>}}, run vs dataset get --id <item-dataset-id> --full with the ItemDatasetId from the workflow's prior scene readback before dry-run or publish, and verify the exact field path; do not skip this because the field name appears obvious. The console may display variables from the template text, but the backend stores only the provided Variables; omitting it makes runtime reason rendering incomplete.
• Removing or replacing a scene's reusable rule binding does not authorize deleting the old rule by itself. Keep detached rules by default. When cleanup is explicitly requested, publish and read back the scene first, then verify each exact old rule has Used=false before deleting it; never delete a system-generated default rule.
• Check scene-specific merge constraints before writing MergeConfigs: for_you does not support item_similarity, and shopping_cart supports only item_similarity_first or custom.
• Do not create or update a recommend scene until the target page/module and UserEventScenes are resolved; use --confirm-entry-binding for real writes.
• Start with the scene when debugging recommendation behavior; do not jump to raw API calls first.
• Use vs recommend scene update for persistent recommendation behavior and do not invent low-level API mappings inside this skill.
• For natural-language scene-change requests, use references/recommend-scene-natural-language-routing.md as the routing layer; if the target is a rule-resource workflow, do not reduce it to a single inline scene field edit.
• For scene updates, prefer a readback check after mutation instead of assuming the write succeeded.
• If a scene update unexpectedly fails or appears to no-op, verify the accepted command behavior and parameter requirements before retrying.
• When reporting runtime results, summarize the scene, user context, item context, raw rec_results, and relevant extra_info before proposing tuning changes.
• Do not invent item titles or explanations. Ground every recommendation summary in the actual response payload.
• If you show only a subset such as Top 5, explicitly say that the full response contains more items.
• If a command failure or user follow-up turns into a product concept, capability, API field, console UI path, purchase, billing, or general troubleshooting question outside this recommend workflow, temporarily hand off to vs-product-qa; return to this workflow only after the grounded product answer is complete.