rea/docs/javascript-route-inventory.md

Static JavaScript route inventory

analyze_javascript_application and analyze_web_bundle retain a shared route_inventory alongside their existing graph and endpoint observations. The inventory answers which route patterns the supplied code suggests, where each pattern came from, and which parts remain unknown. It never requests a route, executes scripts, expands a sitemap, or establishes reachability.

Select a compact view in either MCP analysis call:

{
  "detail": "summary",
  "view": {
    "kind": "javascript-routes",
    "collection": "routes",
    "where": { "path_prefix": "/reports" },
    "fields": ["path", "classification", "confidence"],
    "limit": 20
  }
}

Keep the original analysis inputs in that call. For the CLI, pass the same selection as --view '<JSON>' --detail summary --evidence_output routes.json. The complete Evidence bundle is written without overwriting existing files. Unselected delivery retains the existing complete result. A web-bundle summary requires an explicit route view; application summaries also support the existing general summary when view is omitted.

Use the returned normalized_result.parent_evidence_id with inspect_analysis_view on the same connection. The CLI's exported bundle can be reopened with inspect-evidence-bundle; its records contain the complete Evidence. To use inspect_analysis_view's evidence-file source, extract the selected parent record into a separate local Evidence JSON file (that source accepts one Evidence record, not a bundle). Views do not reopen source files or reconnect to a browser. Historical Evidence without route_inventory is unmeasured, rather than an empty route set.

Collections are summary, routes, occurrences, sources, and unknowns. All row collections support exact batch where.ids, field selection, offset, and limit. An explicit empty filter array matches nothing. Routes also support exact paths, literal path_prefix, classifications, mechanisms, and min_confidence; occurrences support route_ids, source_ids, and mechanisms; sources support keys and statuses; unknowns support source_ids and kinds. Follow coverage.next_offset until coverage.exhausted; a page may stop early at the 1 MiB serialized view budget. Oversized indivisible facts return a resource error carrying the retained parent Evidence ID.

Pattern IDs bind the exact path. Source IDs bind the source key, path, original URL, content digest, container digest, and any retained Next source applicability context (including the owning package digest). Occurrences identify a detector mechanism at a source location; one location may support multiple mechanisms. source_count counts distinct sources. Lookup IDs use 128 bits of SHA-256; full content and inventory digests remain SHA-256. Field selection always keeps row identity and necessary provenance. The page's deduplicated sources table contains the source descriptors referenced by returned rows. Retrieve all occurrences by route ID when independent supporting evidence matters. Source ranges use one-based lines and zero-based UTF-16 columns with exclusive ends; filename-only discoveries have no invented AST range.

The shared parser handles literal router calls, nested route objects, typed _$ trees with explicitly inferred property-name fallbacks, Next App Router page paths, and navigation targets. It follows stable lexical bindings and keeps unresolved parents, mutations, spreads, and dynamic fields explicit. Index-route flags use the same value-at-read boundary as path fields: erased type wrappers and initialized stable boolean aliases preserve true/false; uninitialized or unresolved flags retain an interpretation unknown instead of silently disappearing. A selected route-builder root owns its configuration even when mutation prevents trusting its value. Ordinary wrapper keys do not become route ancestors. Missing outer ancestors of unbound typed subtrees remain unknown rather than invented. Generic Next runtime path constants require a top-level application segment supported by structural or navigation candidates across the supplied sources. This limits framework filesystem noise, while leaving unsupported candidates unknown. The parser shares the existing AST traversal and lexical index.

Literal fragments of computed expressions, module references, and page-shaped paths owned by Next interpretation do not also become generic route constants. Selected getter results retain the shared semantic owner's allocation identity; finite selections can claim their query data, while widened or cyclic selections keep an unknown in the interpretation that requested them.

Next page conversion receives an explicit source context. For local source files, the shared JSON owner first establishes a declared next dependency in the nearest owning package. Inventoried directories then select that package's app before src/app, following Next's root selection. Only files beneath the selected directory supply source-page support. Default .next/static/chunks/app output receives a separate compiled-directory context from the same package owner; custom build directories remain unmodeled. Pages Router files, unrelated components, and nested packages do not inherit that root merely because their paths contain app. Missing package/framework evidence remains an interpretation unknown for page-shaped source paths. Each page-shaped source retains its next_app_context and package identity so this derivation remains inspectable.

Captured script URLs use the /_next/static/chunks/app/ asset boundary, independently of local package evidence. Source literals use recognized Next runtime context; imports, exports, and direct call arguments do not themselves declare pages. The parser completes its runtime-marker scan before interpreting retained module literals, so marker placement does not change the result. A matching filename suffix alone cannot establish App Router ownership.

Next dynamic segments map to :id, :slug+, or :slug*; groups and parallel slots do not contribute URL segments. Intercepted routes remain unresolved. A prefix before /_next/ is an inferred routing base: assetPrefix can differ from the routing base. Every affected occurrence keeps unprefixed_path, inferred_base_path, and low confidence. system classification is explicitly a path-name heuristic; page uses page-file or structured/typed configuration support. Name-only route/addRoute calls remain unknown because they can also register server APIs.

Next page-source segments keep their filename spelling when converted to route patterns. Next's page-path conversion removes page extensions and the index tail without URI-decoding segments, so ordinary percent sequences are not decoded: %61 and a remain separate candidates and a literal % is retained. Its App pathname normalizer specifically applies the underscore normalizer, which maps %5F to _; private-folder checks apply to the source spelling before that escape is mapped. When classifying a chunk URL, REA reads its pathname, then applies these same Next-specific rules. This is static source-path interpretation, not browser request-path decoding or reachability.

Known capture omissions remain inline in summary.reported_capture_omissions and queryable as unknowns of kind capture-omission. Each keeps a stable gap ID, its script-record/script-source unit, and the reported count (including null for unknown). They do not invent missing script identities or source ranges.

Counts describe deduplicated patterns in the provided code sources. They are not a denominator for complete application or capture coverage. In particular, server-only, lazy, inaccessible, or unselected sources may be missing. coverage.application_routes always remains unknown; parsing and candidate enumeration have their own completeness. Static work and fact admission share the existing 8 MiB per-source transfer ceiling, and the root inventory has an 8 MiB admission budget. Exhaustion preserves a prefix with explicit capacity; the serialization owner also admits route facts within the actual space left by legacy facts. result-bytes capacity preserves an earlier work-capacity reason; if even that envelope cannot fit, the optional route facet remains unmeasured. These are accounting bounds, not a claim that total process memory is 8 MiB.

Projection only reduces delivery, not analysis work. Retained immutable Evidence can reuse validated tables through a weak cache with the snapshot's lifetime; subject identity is checked on every query. No live state or source content is cached as current. Use existing source selection and resource controls when they match the investigation, keeping their partial coverage visible.