Roadmap: v2.0 and Beyond

Version 2.0 — AI-Accelerated Core & Quality Upgrade

UDE v2.0 consolidates the pipeline's internal architecture across four clusters: Infrastructure modernisation, Library API & CLI unification, Typed Intermediate Representation, and QA & Testing completeness. It does not change the user-facing navigation architecture or render parity — those are explicitly deferred to v3.0+.

Prerequisite: UDE v1.0 MVP fully delivered.

v2.0 introduces breaking changes to the IR data model and ProjectCatalog schema. All parsers, renderers, and tests require refactoring for the typed entity models. All other user-facing configuration files remain backward compatible with v1.0.

Deferred to v3.0+: sidebar.toml as single navigation source (GAP-06), static/inline/redirect page rendering (GAP-26), fully static document generation (GAP-30), C++/C#/Java render parity (GAP-28), Docomatic legacy compatibility (GAP-29). These items depend on the v2.0 typed IR being fully stable before the navigation layer is refactored.

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Cluster A — Infrastructure (4 items)

#	Item	GAP	Description
A1	Global Config Activation	GAP-09	Activate doxygen_path, log_level, log_file, cache_root_dir, global_templates_dir from ude_global_config.json. Currently only error_policy is active in v1.0. translation_service remains reserved until v3.0+.
A2	Unified Logging	GAP-12	Introduce a single logging_setup() call at engine startup configuring StreamHandler (stderr always) and FileHandler (when log_file is set). Fix incorrect logger label ude.renderers in interfaces.py (HC-05). Prerequisite: GAP-09.
A3	L2 Render Cache Activation	GAP-07	Wire BuildCacheManager L2 render cache into all renderer render() calls; IR-hash-based cache invalidation; orchestrator passes cache_dir from cache_root_dir. The BuildCacheManager implementation exists in storage.py but is currently not wired to renderers. Prerequisite: GAP-09 (cache_root_dir).
A4	Doxyfile Key-Level Merge	GAP-11	Parse each Doxyfile source as a key = value dictionary; apply 3-tier explicit override semantics (T1: global template → T2: target-specific template → T3: runtime parameters). Conflicts logged at DEBUG level. The v1.0 interim behaviour is source concatenation with Doxygen last-value-wins.

Cluster B — Library API & CLI (2 items)

#	Item	GAP	Description
B1	UdeOrchestrator Library API	GAP-05	Expose parse(config) -> ProjectCatalog, render(catalog, config) -> None, and run(config) -> None as public methods on UdeOrchestrator. Reduce cli.py to argument parsing only. Consolidate deep_merge() and find_product_json() — currently duplicated in both cli.py and orchestrator.py — into orchestrator.py.
B2	CLI Subcommands	GAP-01	Add ude compile, ude parse, ude render, and ude audit subcommands. Prerequisite: GAP-05. ude parse followed by ude render must produce identical output to ude compile. The v1.0 CLI is a flat invocation: ude --global-config <path> --sdk-config <path> --doc-config <path>.

Cluster C — Typed IR (1 item)

#	Item	GAP	Description
C1	Typed Entity Models	GAP-03	Replace the v1.0 ClassEntity discriminated union with seven typed Pydantic models: ClassModel, MethodModel, ParameterModel, EnumModel, VariableModel, ConstantModel, TypeAliasModel. Extend ProjectCatalog with project_name: str and version: str fields (currently absent). Refactor all parsers, renderers, and tests accordingly. This is the highest-effort item and a prerequisite for the v2.0 documentation coverage gate (GAP-10).

Cluster D — QA & Testing (3 items)

#	Item	GAP	Description
D1	Documentation Coverage Gate	GAP-10	Add two read-only enforcement modes configurable via global config: reject-undocumented (non-zero exit if coverage below threshold) and allow-undocumented (warnings only). Add ude audit subcommand generating a coverage report per entity type. No LLM calls in v2.0 — enrichment modes (auto-document, verify-document) are v3.0+. Prerequisite: GAP-03 (typed IR for accurate per-entity-type counting).
D2	External Script Confirmation	GAP-31	Locate, commit, or re-implement three integration scripts referenced in integration_tests_specification.md whose repository location is currently unconfirmed: Tests/run_regression_tests.py (TEST-INT-01), Tests/verify_pages.py (TEST-INT-03), Tests/check_links.py (TEST-INT-04, TEST-INT-06). No pipeline/tests/ or pipeline/loadtest/ directory was found during the 2026-06-28 testing audit. The in-engine equivalents engine/tests/test_golden_master.py and engine/tests/test_docomatic_alignment.py are confirmed present.
D3	Per-Language Integration Suites	GAP-32	Implement full parse → render integration test suites for each of the four supported languages, exercising Doxygen XML input through to output file structure verification. Current per-language coverage is golden master regression only. Missing coverage per language: C++ — category landing pages, overload dispatcher pages, member-type index pages; C# — interface/delegate/event rendering, namespace index pages; Java — extends/implements relationship rendering, package-level index pages; Python — fget/fset property and dunder method edge cases.

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Breaking Changes from v1.0

Area	v1.0	v2.0
IR entity type	ClassEntity discriminated union	7 typed Pydantic models
ProjectCatalog	(namespaces, metadata)	(project_name, version, namespaces)
CLI	Flat flags: ude --global-config ... --sdk-config ... --doc-config ...	Subcommands: ude compile / parse / render / audit
Global config	Only error_policy active	All fields active (translation_service reserved until v3.0+)
Logging	Default stderr WARNING	Configurable via log_level / log_file
sidebar.toml	Optional (graceful fallback to API Reference only)	Optional — unchanged in v2.0
toc_<ClassName>.json	Required (nav tree source + flat-mapping algorithm)	Required — unchanged in v2.0

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Version 3.0+ — Deferred Roadmap

The following items are explicitly deferred to v3.0+. They depend on the v2.0 typed IR and architecture being fully stable, represent major infrastructure investments, or require direct v2.0 prerequisites.

Prerequisite: UDE v2.0 fully delivered.

Navigation Architecture

• sidebar.toml as Single Navigation Source (GAP-06): sidebar.toml becomes required in every SDK project configuration directory. Absent file terminates UDE with a clear error. sidebar.toml becomes the sole authoritative source for the complete sidebar, supporting api_reference, static, inline, and redirect node types. The toc_<ClassName>.json files in SidebarStructures/ are removed. The recovered_toc_algorithm (flat-mapping rules, virtual group folder definitions) is embedded as class-level attributes in each of the 16 concrete renderer classes. Breaking change surface: every SDK project must add a sidebar.toml; toc_<ClassName>.json files must be migrated; recovered_toc_algorithm becomes non-user-configurable.

• Static, Inline, and Redirect Page Rendering (GAP-26): Full rendering support for type = "static" (reads a file at source_path), type = "inline" (writes embedded content string), and type = "redirect" (generates <meta http-equiv="refresh"> in HTML, redirect_url front-matter in Hugo) sidebar nodes across all 16 concrete renderer classes. Prerequisite: GAP-06.

• Fully Static Document Generation (GAP-30): Complete self-contained static site composition from composed static / inline / redirect node hierarchies with nested child nodes. source_path in static nodes resolved relative to the sidebar.toml file location. Prerequisites: GAP-06, GAP-26.

Language Parity & Legacy Compatibility

• C++, C#, Java Render Parity (GAP-28): Equivalent rendering of category landing pages, namespace-level index pages, overload dispatcher pages (!!OVERLOADED_*), and member-type index pages (!!MEMBERTYPE_*) for all four languages. Currently only Python's _post_render generates these pages. Language-specific rules: C++ — :: separator, __ flat-mapping, pointer/reference substitution; C# — interface/delegate/event entity types; Java — extends/implements relationship rendering; Python — dunder method preservation, fget/fset property rendering. Prerequisite: GAP-03 typed IR must be stable.

• Docomatic Legacy HTML Compatibility (GAP-29): The 8 HTML Legacy renderer classes (CppHtmlLegacyRenderer, CsHtmlLegacyRenderer, JavaHtmlLegacyRenderer, PyHtmlLegacyRenderer) validated and aligned against a Docomatic-generated reference HTML baseline. Hugo Markdown Legacy renderers are not bound by Docomatic HTML visual conventions.

AI-Powered Documentation Enrichment

• LLM Docstring Generation (REQ-BUS-05): auto-document mode writes LLM-generated English docstrings back to source files directly. verify-document mode generates PR proposals or draft branches requiring developer approval before merge. Both modes are non-interactive and CI/CD compatible. Prerequisite: v2.0 coverage gate (GAP-10).

• Multi-Language Translation (REQ-BUS-06): Incremental gzip-compressed translation cache committed to Git, storing approved translations keyed by source string hash. Human override files for quality control. Activation of the translation_service field in ude_global_config.json (reserved in v1.0 and v2.0). Zero developer overhead for standard compilation runs. Prerequisite: v2.0 global config activation + v3.0+ LLM enrichment infrastructure.

• XLIFF Integration: CLI subcommands to export and import standard .xlf translation packets to professional translation services.

Expanded Output Formats

• RAG Hierarchical Export (REQ-BUS-04): Structured, metadata-rich hierarchical JSON (--format json_rag) for AI semantic search and developer chatbots. Fields per entity: entity type, fully qualified name, source file path and line range, signature hash, dependency relations, docstring in normalized CommonMark.

• Structured XML Output (REQ-BUS-02): API catalog rendered as structured XML with a documented, stable schema.

• Build and Execution Reporting (REQ-BUS-07): Post-compilation report: wall-clock time per pipeline stage, file counts, cache hit ratios (L1 and L2), API token usage and estimated cost for LLM calls.

Advanced Parsing

• SWIG Wrapper-Aware Parsing: Identifies SWIG-generated files by convention; maps wrapper entities back to originating C++ API using SWIG transformation rules; extracts the consumer-facing public API rather than SWIG scaffolding. Integrates with DoxygenXmlParser as a selectable dialect. The existing exclude_swig_internals flag remains available. May be promoted to v2.0.

• Native Language Parsers (REQ-BUS-01): Direct source code parsing without invoking Doxygen, using tree-sitter and libclang AST frontends. Produces the same ProjectCatalog IR as the Doxygen-based pipeline. Doxygen pipeline retained in parallel. May be promoted to v2.0.

Advanced QA & Testing

• CSS Visual Regression Testing (TEST-INT-10): Headless browser (Playwright or Selenium) screenshot pixel-diff checks against pre-approved PNG baselines. Flags layout shifts exceeding 0.1% threshold. Primary target: Python. Prerequisite: stable HTML template architecture — v2.0 sidebar.toml refactor and custom page rendering must be complete before baselines are meaningful.

• Search Index Integrity & Anchor Verifier (TEST-INT-11): Validates search index JSON entries map to physical generated pages and resolves anchor references (#ClassName) to confirm matching id/name attributes exist. Primary spec target: Delphi; preferred fallback: Python. Traced: REQ-FUN-31.

• Wrapper Boundary Parameter Integrity (TEST-INT-12): Validates parameter lists, data types, and default values across C++ → Python/Java/C# SWIG transformation boundary; alerts on renames, drops, or type remappings. Primary target: Python. Prerequisite: v3.0+ SWIG wrapper-aware parser. Traced: TSK-RND-09.

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Consolidated Deferred Requirements Reference

ID	Version	Category	Description
GAP-01	v2.0	CLI	Subcommands (compile / parse / render / audit)
GAP-03	v2.0	IR	Typed Pydantic entity models (7 models replacing ClassEntity)
GAP-05	v2.0	Architecture	UdeOrchestrator library API; cli.py as thin wrapper
GAP-07	v2.0	Caching	L2 render cache activation
GAP-09	v2.0	Config	Global config field activation
GAP-10	v2.0	QA	Documentation coverage gate (read-only modes + ude audit)
GAP-11	v2.0	Collector	Doxyfile key-level 3-tier merge
GAP-12	v2.0	Infra	Unified logging (logging_setup())
GAP-31	v2.0	QA	External integration scripts — confirm or re-implement
GAP-32	v2.0	QA	Per-language integration test suites
GAP-06	v3.0+	Navigation	sidebar.toml as single navigation source; toc_*.json removal
GAP-26	v3.0+	Rendering	Static / inline / redirect page rendering
GAP-28	v3.0+	Rendering	C++ / C# / Java render parity
GAP-29	v3.0+	Rendering	Docomatic legacy HTML compatibility
GAP-30	v3.0+	Rendering	Fully static document generation
REQ-BUS-01	v3.0+	Parsing	Native language parsers (Doxygen-independent)
REQ-BUS-02	v3.0+	Output	Structured XML output format
REQ-BUS-04	v3.0+	Output	RAG hierarchical JSON export
REQ-BUS-05	v3.0+	AI	LLM docstring enrichment (auto-document / verify-document)
REQ-BUS-06	v3.0+	AI	Multi-language translation cache + XLIFF integration
REQ-BUS-07	v3.0+	Reporting	Build and execution cost reporting
TEST-INT-10	v3.0+	QA	CSS visual regression testing
TEST-INT-11	v3.0+	QA	Search index integrity & anchor verifier
TEST-INT-12	v3.0+	QA	Wrapper boundary parameter integrity