---
id: PLN-0114
ticket: multi-frontend-remove-pbs-branches
title: Migrate hover and documentation to generic frontend models
status: done
created: 2026-07-15
completed: 2026-07-15
ref_decisions: [DEC-0042]
tags: [compiler, compiler-general, compiler-pbs, studio, frontend, coupling, multi-frontend]
---

## Briefing

`DEC-0042` requires hover and documentation Markdown to be represented through generic frontend models so LSP does not know PBS semantic or documentation internals.

## Objective

Migrate LSP hover handling to generic frontend hover models while preserving PBS signature, kind, origin, detail, and Markdown documentation behavior.

## Dependencies

- Depends on `PLN-0111`.
- Should run after `PLN-0113` so generic symbol kinds and documentation fields are established.

## Scope

- Define or finalize generic hover/documentation DTOs.
- Map `PbsEditorialResolvedSymbol` to generic hover output inside the PBS boundary.
- Update LSP hover composition to consume generic values.
- Preserve Markdown output and existing no-symbol fallback.

## Non-Goals

- Changing the PBS `[Doc]` language feature.
- Reformatting authored Markdown.
- Implementing go-to-definition or references.
- Migrating signature help request handling, except for shared signature DTOs used in hover.

## Execution Method

1. Inspect `PbsEditorialResolvedSymbol`, `PbsEditorialSignature`, and `formatHoverMarkdown(...)`.
2. Ensure generic `FrontendHover` can represent:
   - display name;
   - symbol kind;
   - detail;
   - origin;
   - signatures;
   - documentation Markdown.
3. Add PBS mapping from `PbsEditorialResolvedSymbol` to `FrontendHover` inside the frontend language service.
4. Update `CompilerLanguageServiceBridge.hover(...)` to call generic hover capability and format generic hover values.
5. Keep Markdown composition deterministic: signature block, kind/origin metadata, then documentation.
6. Preserve empty/no-symbol fallback when hover capability is absent.

## Acceptance Criteria

- LSP hover no longer consumes `PbsEditorialResolvedSymbol`.
- PBS documentation Markdown appears unchanged in hover.
- Authored Markdown is not reflowed or reparsed by LSP.
- Missing capability returns deterministic no-symbol hover behavior.

## Tests

- PBS hover/editorial tests.
- LSP hover mapping tests asserting Markdown payloads.
- Documentation Markdown regression tests from `DEC-0039` coverage.
- Missing hover capability fallback test.

## Affected Artifacts

- `prometeu-compiler/prometeu-frontend-api/src/main/java/p/studio/compiler/services/...`
- `prometeu-compiler/frontends/prometeu-frontend-pbs/src/main/java/p/studio/compiler/PBSFrontendLanguageService.java`
- `prometeu-lsp/prometeu-lsp-v1/src/main/java/p/studio/lsp/services/compiler/CompilerLanguageServiceBridge.java`
- Hover-related tests.