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Colby McHenryandClaude Opus 5 94f4e287e6 feat(ui): entry points — routes, executable files and tests as flow starting points (CG-54)

`#/entry` answers "where does anything start" at full length, and turns any row
that names a symbol into a flow.

Server. `/api/entrypoints` gains `frameworks` (from `getDetectedFrameworks`), a
`tests` list, a `routes` limit of its own, and a cache keyed on the index build
— nothing here is read from disk, so unlike `/api/source` a cached answer cannot
be stale about drift. `routes.items` is now a `WireList` like every other list on
the payload.

Routes carry where the URL is REGISTERED as well as where it is served:
`getRoutingManifest` selects the route node's id, file and line, and
`buildRoutes` splits the verb off the name against a fixed list (never "the
first word", which would take the head off a file-routed `/blog/[slug]`). All
four payroll-go routes register in one router file and three are served from
another — group by the handler file and one router becomes two groups plus an
orphan.

`isTestFile` is split into `isTestPath` (test filename and directory
conventions) + the non-production catch-all, byte-identical at every existing
call site. The Tests list uses the narrow half: an example, a benchmark or a
fixture is off-target for ranking but is not a test, and a heading that says
"Tests" must not quietly count them. Tests rank by REACH — distinct other files
touched — because Go, Rust and Java put test work inside functions where a
module-level-calls ranking sees nothing. Two read-only engine queries make that
affordable: `getFileReachCounts` (the mirror of `getFileDependentCounts`, driven
from `nodes` by path so the cost follows the files asked about rather than the
edge table) and `getFileNodes`.

Viewer. `ui/src/lib/entry-model.ts` folds the four lists into file groups —
pure, and `panel.rows` stays exactly the sections it draws. `EntryView` +
`EntrySection` render them with the caller rail's `.filegroup` / `.row` shapes
rather than a second visual language for the same idea. A row that names a
callable symbol carries a `Flow ›` chip; the other end is typed or picked with
`→ here` on another row. File and test rows carry none: `/api/flow` searches by
name, and a file has none the path finder can look up.

A project with fewer than three resolvable routes gets no Routes heading at all,
not an empty one. Typing into the search box now also returns matching entry
points under their own heading below the symbol matches, so a URL comes back
with its handler attached; rows already in the results are dropped.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-08-27 05:20:15 -05:00

7.1 KiB

Raw Blame History

ui/ — the `codegraph ui` viewer

The browser reader for an indexed project: Svelte 5 + Vite, built as static files and served by the CLI over loopback. An npm workspace of the engine, so npm ci at the repo root installs its toolchain; nothing here is a runtime dependency of the engine and nothing here is published to npm on its own.

Design spec (every token, size and measurement): ../docs/design/codegraph-ui-design-spec.md.

Build

npm run build          # from the repo root: tsc -> copy-assets -> this app
npm run build:ui       # just this app, plus the dist assertion
npm run dev -w ui      # Vite dev server on 127.0.0.1:5174
npm run check -w ui    # svelte-check

npm run build emits dist/viewer/ (index.html + hashed assets). scripts/check-ui-build.mjs then asserts the tree is complete, so a broken UI build fails the release instead of shipping a CLI that serves a 404. The same check runs again in scripts/build-bundle.sh (after the bundle stage copies dist) and in scripts/pack-npm.sh (after each archive is unpacked).

Why `dist/viewer` and not `dist/ui`

src/ui/ is the engine's terminal UI (shimmer progress and its worker) and tsc compiles it to dist/ui/. Pointing Vite there deletes those modules — the CLI then dies at startup with Cannot find module '../ui/shimmer-progress' — and would also leave the static server handing out compiled engine internals. check-ui-build.mjs re-asserts the compiled engine is intact after every UI build so that mistake cannot land twice.

Layout

src/
  main.ts                 fonts + tokens, mounts App into index.html's #app
  app.css                 design tokens (light/dark), reset, shell grid
  App.svelte              top bar / trail bar / main, global keys
  lib/router.svelte.ts    hash router: #/s/<id>, #/file/<path>, #/map, #/flow, #/entry
  lib/trail.svelte.ts     the walked path; mirrored into the `t` query param
  lib/kinds.ts            kind glyph letters
  lib/map-model.ts        the Map's deterministic layered layout (pure)
  lib/flow-model.ts       the Flow strip's card/link geometry + the end cap — a DAG (pure)
  lib/filecode-model.ts   the whole-file view: fixed line height, arcs, paging (pure)
  lib/entry-model.ts      the entry-points panel: rows, file groups, flow arming (pure)
  lib/live.svelte.ts      /api/events: two counters every screen refreshes from
  lib/toast.svelte.ts     the one transient note ("Index updated · reloaded")
  components/             TopBar, TrailBar, KindGlyph, DriftBanner, Toast, map/, flow/, symbol/, file/, entry/
  views/                  one component per route

Fonts (Archivo Variable, IBM Plex Mono) are vendored through @fontsource* and emitted into dist/viewer/assets: a local reader must work offline and must not announce the project to a font CDN.

Routes

hash	view
`#/`	nothing selected
`#/s/<id>?hl=<line>&t=<trail>`	symbol view
`#/file/<path>?hl=<line>`	file view — outline in source order
`#/file/<path>?src=1`	file view — the whole file's source, with ports and call arcs
`#/map?root=&depth=&tests=1`	module map
`#/flow?from=&to=`	flow strip — the call path between two symbols
`#/flow?symbols=a,b,c`	flow strip — `codegraph_explore`'s own question
`#/flow?t=<trail>`	flow strip — the trail you walked, read as a flow
`#/entry`	entry points — routes, files that run something, tests, hubs

Entry points

#/entry draws /api/entrypoints as file groups, reusing the Symbol view's .filegroup / .row shapes rather than inventing a second visual language for "a list of code, grouped by where it lives". Three things about it are decisions, not accidents:

Routes group by where the URL is REGISTERED, not where it is served. A router file is the shape a reader already has in mind; handlers scatter across a package. The payload carries both, and the row's meta line names the handler and its file:line.
A row offers a flow only if it names a callable symbol. /api/flow searches the graph by NAME, and a file has none the path finder can look up — so route and hub rows carry a Flow › chip and file and test rows do not. A chip that always failed would be worse than no chip.
No empty Routes box. A project with fewer than three resolvable routes is not a routed app, and the section is absent rather than empty; the panel falls back to the files that run something and the tests that exercise them.

buildEntryPanel is pure and keeps panel.rows exactly equal to the sections it draws, the same identity the search palette rests its keyboard on.

Where the graph stops

A flow that does not reach everything it was asked about carries a boundary on the wire, and buildFlowLayout turns it into an extra 240px node one column past the symbol the path stopped at, joined by a dotted 2 4 link labelled "end of static path" that deliberately has no arrowhead — an arrow would point at a continuation, and the absence of one is the finding.

Two rules hold it together:

The cap's height is arithmetic, like a card's. endCapText() builds every sentence the cap shows and endCapHeight() measures them; the component then renders exactly what was measured. Change the wording in one and the other moves with it — they are the same function read twice.
One cap per stopping symbol, not per flow. Two paths that run out at the same place ran out for the same reason, and two caps side by side would read as two different findings.

The verdict itself is not computed here or in the server: it is findDynamicBoundaries in src/graph/dynamic-boundary-report.ts, the same detector codegraph_explore announces boundaries with.

Live updates

The viewer never polls. lib/live.svelte.ts holds one EventSource on /api/events for the life of the page and exposes two counters:

indexTick — the graph moved (somebody synced). Every screen refetches: a rail is an answer about the whole graph, and a symbol gains a caller when some other file is edited, so filtering by the focused file would leave the rails quietly wrong. One request per sync.
diskTick — source files changed on disk and the index has not caught up. Only the screen showing one of those files reacts, and what it does is draw a drift banner.

liveRefresh(file, refresh) is the three lines of bookkeeping that turns a counter into a single call; the Map and the Flow strip instead read live.indexTick straight inside the effect that already fetches them.

Reconnection is ours, not EventSource's: each failure closes the stream and schedules ONE retry on a backoff that ends after eight attempts (~90 s), at which point the top bar says "Not live" and nothing more is requested until the tab is focused again. A degraded event — the server's watcher gave up — is shown the same way and never answered with a poll.

Node ids and file paths are encoded per slash-separated segment, so #/file/src/mcp/tools.ts stays readable and still round-trips a segment containing a reserved character. Build hashes with symbolHref() / fileHref() / mapHref() / flowHref() rather than by hand.

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ui/ — the codegraph ui viewer