feat(explorer): ship Effort Graph visualizer with flatbread start

[tonyketcham]

Merge vehicle for the explorer package stack (supersedes closed #230–#232).

Ships @flatbread/explorer, a single-page web app that draws the relationships between content records. When a config uses effortGraphContent(), flatbread start serves it at /, with the Apollo sandbox at /graphql and the event stream at /events. Replaces the deleted examples/effort-viz Next.js app.

What lands

1. Ship @flatbread/explorer with flatbread start mounting
2. Restore monorepo path aliases for explorer typecheck
3. Harden the mount gate, tests, and watch lifecycle
4. Sync the skill projection; tolerate watcher teardown EINVAL
5. Five rounds of review fixes (below)

Review fixes

Real bugs found and fixed

• GET /events/ returned the explorer's HTML instead of the event stream. The SPA fallback excluded /graphql by exact match and prefix but /events by exact match only, and it runs before the SSE handler.
• -H, --https advertised a server that does not exist. Nothing read FLATBREAD_HTTPS, so the flag never changed how Flatbread listens, yet the banner printed https://localhost:<port+1> and --open opened an HTTPS URL. Dead plumbing and false banner lines removed; the flag still parses so existing scripts run.
• flatbread start hung forever when the forked GraphQL child died before reporting ready — a broken config or a taken port left the parent alive with nothing to do.
• evaluate() read index.html right after checking it exists, so a file vanishing in between failed a watch-mode config reload.
• ?endpoint=/ resolved to the explorer's own HTML instead of /graphql, because the root-path normalization ran only on the absolute-URL branch.
• explorerAssetsPresent() used existsSync, which is true for a directory. A directory named index.html made --open open a broken explorer.
• A real CI failure: watch-mode startup lost an inotify_add_watch race on Linux. The ignore globs matched paths inside the fixture directories, not the directories themselves, so parcel still registered them on the way down. Earlier green runs were luck. Fixed with directory-pair ignores plus wider retries.

Contract and test work

• Watch mode no longer bakes AVA fixture names into production. watchIgnore.ts holds the production list; tests pass their fixture globs through a new option, and a deep-equal pin stops them being reintroduced.
• --open waits for flatbread-gql-ready instead of racing startup, and resolves the path at ready time so the assets check happens as late as possible.
• The server-only keep-alive branch moved into ready.ts behind injected spawn and exit, unit-tested rather than forked.
• New coverage for the watcher error and push soft-fail paths, the reload-time missing-assets latch, the bootstrap eventsPath contract, and static assets with and without file extensions.
• openPath.test.ts tests are all serial now; they shared module-global override state and could race.

Docs

Rewritten to the repo's plain-English rules: dropped the ## Local DX and ## Package surface headings, spelled out SPA and HMR on first use, and replaced abstract "assets gate" wording with what Flatbread does. Corrected five false HTTPS claims across AGENTS.md, CONTRIBUTING.md, examples/nextjs/README.md, packages/flatbread/README.md, docs/local-dev-loop.md, and flatbread-flow-agentic-workflows.md — including a cited port 5058 HTTPS listener that never existed. CLI examples use npx for package consumers and pnpm exec for monorepo contributors.

Three review suggestions were declined with reasons in the PR comments: hiding setExplorerStaticDirOverride (a separate package's tests need the export), extracting an --open sequencer (it would test a two-line promise chain whose guarantee is already covered), and requiring a hashed assets/*.js in the asset gate (it would couple the gate to Vite's output naming).

Test plan

• pnpm verify — lint, typecheck, build, AVA, Vitest, and 102 explorer tests
• pnpm skills:check; both setup.md copies byte-identical
• All 19 CI checks green, including test (22.x, ubuntu-latest) after the inotify fix
• Close feat(explorer): ship Effort Graph visualizer with flatbread start #230–fix(explorer): harden mount gate, tests, and watch lifecycle #232 as superseded
• Needs an account with write permission: comment @mergifyio queue or tick Mergify's queue checkbox

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Review verdict

REQUEST_CHANGES — consensus HIGH on production --watch ignore globs (liveServer.ts:270-282) plus two further independent HIGHs (watcher error/push soft-paths; mountExplorer.update missing-assets). Prior #230 blockers are closed at 9fde89a / 58a9a82 / 75fc81a.

What still blocks

1. Watch ignore contract — **/.tmp-effort-*/** and **/.tmp-explorer-*/** bake AVA fixture prefixes into the public watch path. Real content under those names never hot-reloads, and hermeticity is coupled to test naming with no pos/neg/edge proofs.
2. Watcher soft-fail untested — error callback and coordinator.push throws are swallowed with no tests; a regression that re-rejects the server or drops all pushes would stay green.
3. update missing-assets untested — initial mount gate is covered; reload-time replaceConfig / update when assets vanish is not.

Prior #230 status

Closed: openPath↔mount assets gate, mount /graphql+/events/missing-assets/extensionless, sticky watch + live server.explorer, explorer preplay:efforts, vite base.

Coverage plan (highest priority)

1. Watch ignore: .tmp-live-server-test-* still commits; .tmp-effort-* / .tmp-explorer-* do not; .journal ignored.
2. Watcher error / push throw keep server alive; normal event still reindexes.
3. After active mount, update with empty static override warns once, deactivates, then restore re-enables.
4. Assert bootstrap eventsPath === '/events'; treat /events/ like GraphQL prefix exclusion.
5. Server-only runner keep-alive fork test.

Perspectives: correctness-and-contracts, test-coverage-robustness, cli-and-runtime, explorer-package, dx-and-examples → judge. Models: grok-4.5 high / composer-2.5.

  

_{Sent by Cursor Automation: Flatbread PR Review}

[tonyketcham]

All eight review findings are resolved in 51a61f1. I checked each against the source before acting; all eight were valid, and two were real bugs rather than test gaps.

Real bugs

1. GET /events/ returned explorer HTML, not the event stream. The SPA fallback excluded /graphql by exact match and prefix, but /events by exact match only — and it runs before the SSE handler. Added the /events/ prefix exclusion. The test failed before the fix and passes after.
2. -H, --https advertised a server that does not exist. runner.ts set FLATBREAD_HTTPS, but nothing read it — server.ts reads only FLATBREAD_PORT and FLATBREAD_WATCH. So the flag never changed how Flatbread listens, yet the banner printed https://localhost:<port+1> and --open opened an HTTPS URL against a plain-HTTP server. Removed the dead plumbing and the false banner lines, kept the flag parsing so existing scripts still run, and corrected its help text. Also dropped --https from the Next.js example script and fixed the matching stale claim in AGENTS.md.

Watch ignore contract

Production no longer knows any test-fixture name. watchIgnore.ts holds the production list (node_modules, .git, dist, .journal); a new watchIgnore option carries the fixture globs, and only the one watch-enabled test passes them. Content in a directory named .tmp-effort-* now hot-reloads like anything else. Covered positive (.tmp-live-server-test-* stays visible), negative (fixture prefixes drop when supplied), and edge (defaults match; duplicate extras collapse).

--open startup race

The runner now fires an onReady callback on flatbread-gql-ready and the browser launch hangs off that. The fork still happens before the config load, so config work stays off the critical path to ready and to the corunner — --open waits on a promise for the resolved path instead.

Two places I took a different approach than suggested

• Fixtures outside the watched tree is not possible: watch mode requires content paths relative to process.cwd(), so fixtures must live under it. Parameterizing the ignore list achieves the same decoupling.
• A fork/spawn test for the keep-alive branch would be slow and flaky in CI. Instead the ready-message decision moved into ready.ts behind injected spawn and exit, covered by ten unit tests: server-only keep-alive, exit codes for 0 and null, corunner spawn and package-manager default, either child closing, and a duplicate ready message not spawning twice.

Also covered: watcher error and push soft-fail paths (via a watcherSubscribe test seam), the reload-time missing-assets latch in mountExplorer.update including the warn-once behaviour and reactivation, the bootstrap eventsPath contract plus inactive fallthrough, and static assets with and without file extensions never carrying __FLATBREAD_EXPLORER__.

Docs were rewritten to this repo's plain-English rules: ## Local DX and ## Package surface are gone, SPA and HMR are spelled out on first use, and the abstract "assets gate" wording now states what Flatbread does. Both setup.md copies stay byte-identical and pnpm skills:check passes.

pnpm verify passes locally — lint, typecheck, build, and every test suite.

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Stale comment

Review verdict: COMMENT

Prior HIGH/MED blockers from the last pass are fixed in code at 51a61f1 (watch defaults, watcher soft-fail, missing-assets latch, SPA /events/, bootstrap eventsPath, server-only keep-alive, -H/launch honesty). No BLOCKER and no consensus HIGH remain.

Remaining signal is MED coverage stickiness plus a few residuals:

1. DEFAULT_WATCH_IGNORE is production-correct, but tests do not lock that .tmp-effort-* / .tmp-explorer-* stay out of the default list.
2. --open ready∧path sequencing is fixed in CLI glue, but untested as a composed unit; path can still be snapshotted before listen-time asset gate.
3. New residuals: GraphQL child death before ready leaves parent alive; asset gate accepts bare index.html; HTTPS wording in Next example docs drifts after dropping --https.

Coverage plan (ordered)

1. Lock exact DEFAULT_WATCH_IGNORE + negative matches for .tmp-effort-* / .tmp-explorer-*.
2. Extract/cover --open sequencer (ready-first, path-first, no double-launch).
3. Parent exits when GraphQL child dies before ready.
4. Live replaceConfig when assets vanish with preset unchanged.
5. Harden/try/catch asset gate beyond bare index.html.

Perspectives: correctness-and-contracts, test-coverage-robustness, cli-and-runtime, explorer-package, dx-and-examples. Models: grok-4.5 high / composer-2.5.

  

_{Sent by Cursor Automation: Flatbread PR Review}

[cursor]

MED — resolveOpenPath / settleOpenPath snapshot the open path at config-load time, while mountExplorer re-checks assets at listen. Assets built or deleted in that window can open /graphql while explorer is live (or the reverse). welcome() also runs before ready.

Minimal fix: Re-resolve / re-check explorerAssetsPresent() inside onReady; optionally defer or label welcome until ready.

[tonyketcham]

Residuals from the second pass are closed in 2d590b7. Five taken, two declined.

Taken — the two that were real defects

• Child death before ready left the parent hanging. If the forked GraphQL child exited or errored before sending flatbread-gql-ready — broken config, port already taken — flatbread start stayed alive with no corunner, no launch, and no exit. createGqlReadyHandler now attaches exit and error listeners as soon as it is built and exits with the child's code (or 1 for null). After ready they stand down, so the parent still exits exactly once. Covered by three new tests including the after-ready no-double-exit case.
• evaluate() could throw between the assets check and the read. Since update runs inside the replaceConfig wrapper, that throw surfaced as a failed config reload under --watch. The read and inject now sit in a try/catch mirroring the missing-assets branch. Worth noting: the inMissingAssets latch moved so it clears only on success, otherwise a recovered read would leave it stale. Test drives a real EISDIR by putting a directory where index.html belongs.

Taken — three smaller ones

DEFAULT_WATCH_IGNORE contents are now pinned by deep-equal with negative assertions for both fixture prefixes; without that, re-baking them in would have stayed green and quietly undone the decoupling. The watcher callback-error test asserts its log line. And --open resolves the path inside onReady rather than at config-load time, so the explorerAssetsPresent() check happens as close as possible to when the child mounts.

Declined, with reasons

• Extract a "ready ∧ path settled → launch once" sequencer. That is a two-line promise chain, and the no-double-launch property it would prove already comes from the handled latch in ready.ts, which has its own test. The abstraction would add ceremony without adding safety.
• Require a hashed assets/*.js in explorerAssetsPresent(). This ties the mount gate to Vite's output naming, so a future build-config change could silently stop the explorer from mounting. The partial-build case it guards against is rarer than the breakage it invites.

Docs

The stale HTTPS wording in examples/nextjs/README.md and CONTRIBUTING.md is fixed — the HTTPS-versus-headless split collapsed into one instruction, since both commands now do the same thing.

Sweeping the rest of the repo turned up three more false claims that were not reported, and one was worse than the flagged pair: flatbread-flow-agentic-workflows.md stated that flatbread start "always binds port 5057 (and 5058 for HTTPS)" and cited a line range in cli/index.ts that no longer exists. That port never existed; the number came from the port + 1 banner text this PR deleted. Also fixed: docs/local-dev-loop.md told readers to prefer the long command to avoid an "HTTPS convenience script" that is now the identical command, and packages/flatbread/README.md repeated the HTTPS claim. The only HTTPS mentions left in the repo's markdown are the two that correctly say Flatbread serves plain HTTP.

pnpm verify passes locally.

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Stale comment

Verdict: REQUEST_CHANGES

Adversarial review of 2d590b7 (bbcaf42…2d590b7). Launch ordering and several prior residuals are closed. Remaining blockers for merge confidence are the weak explorer asset gate, the public test-only static-dir override, and under-tested ready∧path / welcome glue.

Closed since last sync

• DEFAULT_WATCH_IGNORE stickiness tests
• Child exit/error before ready (handlers present; exit covered)
• readFileSync race on explorer update
• HTTPS / plain-HTTP docs drift
• Watcher callback error log assert

Still open (priority)

1. MED — explorerAssetsPresent() is index-only; partial Vite builds mount/--open a broken SPA
2. MED — setExplorerStaticDirOverride is on the package main export surface
3. MED — --open ready∧content→launch sequencer has no composed regression test
4. MED — welcome({ explorer }) still uses the config-load snapshot before ready
5. MED — ready.test.ts never calls emitError (handler exists; coverage hole)
6. MED — CONTRIBUTING.md HMR step uses bare flatbread (not on PATH in the monorepo)

Coverage plan

1. HTML-only dir → explorerAssetsPresent() false; HTML + hashed assets/*.js → true
2. Extracted ready∧path sequencer: ready-first / path-first / no double-launch
3. emitError before ready → exit once, log, no spawn
4. Welcome vs ready: banner matches post-ready resolveOpenPath (or provisional label)
5. After gate tighten: flip index-only fixtures in openPath/mount tests

Perspectives: correctness-and-contracts, test-coverage-robustness, cli-and-runtime, explorer-package, docs-and-positioning. Models: grok-4.5 (high) / composer-2.5.

  

_{Sent by Cursor Automation: Flatbread PR Review}

[cursor]

MED (consensus) — setExplorerStaticDirOverride is re-exported from the package main entry. The JSDoc says “tests only,” and the README public-export table omits it, but any production caller can still import and mutate this process-global seam.

Minimal fix: Drop the override from the public export surface (non-exported helper, or @flatbread/explorer/test / export condition) and point Flatbread tests at that path.

[cursor]

MED (consensus) — --open correctly waits on ready ∧ loadedOpenContent, then re-resolveOpenPath before launch. That sequencer lives only in untested CLI glue (ready.test / openPath.test never compose with settle). A launch-before-both-gates or double-launch regression would not fail CI.

Minimal fix: Extract a pure “ready ∧ content settled → resolveOpenPath → launch once” helper; cover ready-first, path-first, and no double-launch.

[cursor]

MED (consensus) — welcome({ explorer }) still snapshots resolveOpenPath at config-load and prints before flatbread-gql-ready. The banner can advertise / while the child mounts GraphQL-only (or the reverse), even though --open re-resolves later.

Minimal fix: Re-resolve or defer welcome until after ready (or label the explorer line provisional).

[cursor]

Stale comment

Review verdict: REQUEST_CHANGES

Adversarial DAG review of PR #233 @ 0c6b581 (merge-base bbcaf42b). Models: grok-4.5 (HIGH) / composer-2.5 (MED+LOW). Perspectives: correctness-and-contracts, test-coverage-robustness, cli-and-runtime, explorer-package, docs-and-positioning.

Blocking first: relative ?endpoint= still ignores the injected locationOrigin. normalizeGraphqlUrl falls back to window.location.origin / localhost:5057, and endpoints.test.ts locks 9999 → 5057. Vite-on-5173 with ?endpoint=/alt/graphql will talk to the wrong origin.

Still open (MED), carried from prior syncs:

1. Public setExplorerStaticDirOverride on @flatbread/explorer’s only entry
2. explorerAssetsPresent() = bare existsSync('index.html') (dir-as-index can lie to --open / welcome)
3. --open ready∧path sequencer untested (runtime looks correct; no binding test)
4. Welcome snapshots explorer at config-settle; --open re-resolves after ready
5. gqlChild error-before-ready wired but only exit is tested
6. CONTRIBUTING HMR still teaches bare flatbread start --watch
7. buildWatchIgnore expands …/** → bare+contents, but bare extras never gain /**

Closed since 51a61f1 / new in 0c6b581: HTTPS docs drift; DEFAULT watch-ignore stickiness; inotify directory-pair ignores + injectable subscribe retries (good hardening — narrow permanent inotify_add_watch failures later).

Coverage plan (priority)

1. HIGH — endpoints.test.ts: relative ?endpoint= against injected origin (flip the 9999→5057 lock)
2. MED — ready.test.ts: emitError before ready
3. MED — extract --open sequencer; ready-first / path-first / no double-launch
4. MED — staticDir + openPath: dir-as-index.html → absent / /graphql
5. MED — watchIgnore: bare extra → pair, or lock intentional asymmetry

Inline comments bind the highest-signal chunks.

  

_{Sent by Cursor Automation: Flatbread PR Review}

[cursor]

MED (consensus) — setExplorerStaticDirOverride is re-exported from the package’s only public entry. JSDoc says tests-only; any production caller can still mutate this process-global seam.

Minimal fix: Drop it from . exports; expose via @flatbread/explorer/testing / @internal and point Flatbread tests there.

[cursor]

MED (consensus) — --open correctly waits on onReady ∧ loadedOpenContent, then late resolveOpenPath. That sequencer lives only in untested sade glue (ready.test / openPath.test never compose).

Minimal fix: Extract a pure “ready ∧ content settled → resolveOpenPath → launch once” helper; cover ready-first, path-first, and no double-launch.

[cursor]

MED (consensus) — welcome({ explorer }) snapshots resolveOpenPath at config-settle time. --open re-resolves after ready. An asset flip in that window desyncs the banner from the launched tab.

Minimal fix: Derive welcome explorer from the same late resolution used by --open, or re-check assets immediately before printing.

[tonyketcham]

Third pass resolved in 71d9f4d. Four taken, three declined.

On the blocking finding — it is valid, but not for the stated reason. The claim was that Vite on 5173 with ?endpoint=/alt/graphql "will talk to the wrong origin". It will not: in a browser locationOrigin defaults to window.location.origin, so normalizeGraphqlUrl re-deriving its own base arrives at the same http://localhost:5173/alt/graphql, which Vite proxies correctly.

The real defect is narrower and worth fixing anyway: resolveGraphqlEndpoint accepts a locationOrigin argument and honours it on every branch except ?endpoint=, so the argument is a lie on one path — and endpoints.test.ts pinned the wrong answer, cementing it. normalizeGraphqlUrl now takes the origin as an optional second argument and the caller threads it through. The recursive call for a bare host like example.com/graphql deliberately does not forward an origin, since that value is already absolute.

Also taken

• explorerAssetsPresent() used existsSync, which returns true for a directory. A directory named index.html made the gate report assets present, so --open opened / and the banner advertised an explorer that could not serve. It now requires a regular file. This is the cheap version of the hardening suggested twice — it closes the hole without tying the gate to Vite's output naming.
• error-before-ready is now tested alongside exit, including that an error after ready does not exit twice.
• buildWatchIgnore expanded a contents glob into its bare-directory form but not the reverse, leaving the opposite hole. The expansion is symmetric now; a last segment with a non-leading dot such as **/*.log stays a file glob.

One honest consequence worth flagging. The asset-gate fix changed what an earlier test proves. A directory named index.html no longer survives the present check, so that case now exercises the missing-assets branch rather than the read failure it was written for. I renamed the test to say what it actually tests rather than leave a name that had become false. The try/catch around the read stays as a guard for the genuine race — the file vanishing between the check and the read — which no test can trigger on demand. I would rather have an honest test name and an untriggerable guard than fake coverage.

Declined, with reasons

• Hide setExplorerStaticDirOverride from the public entry. Not possible. packages/flatbread is a separate package and its tests need the export; there is no way to share it without exporting it. It is already documented as test-only and kept out of the README's export table.
• Extract an --open ready-and-path sequencer. Third time asked, same answer: it is a two-line promise chain, and the no-double-launch property already comes from the handled latch in ready.ts, which is tested.
• Welcome snapshots the explorer state at config-settle while --open re-resolves after ready. That asymmetry is deliberate. The banner prints immediately so the user sees the URLs without waiting; --open waits because opening a browser at a refused connection is worse than a slightly stale banner.

pnpm verify passes: 102 explorer tests, full AVA and Vitest suites, lint, typecheck, build.

[cursor]

Stale comment

Review verdict

REQUEST_CHANGES — two or more independent HIGHs (ready-handler post-ready hang; explorer onboarding docs using bare flatbread start vs AGENTS/pnpm exec contract).

Prior HIGH on relative ?endpoint= ignoring locationOrigin and directory-as-index.html are closed at 71d9f4d. New blockers below.

Closed since last pass

• Relative ?endpoint= now honors injectable locationOrigin (tests lock 9999).
• explorerAssetsPresent() requires index.html to be a regular file.
• emitError before ready is covered in ready.test.ts.
• Bare watchIgnore directory extras expand via directoryIgnore.
• CONTRIBUTING HMR step uses pnpm exec flatbread.

Still open / new

1. HIGH — After first flatbread-gql-ready, exit is ignored while close→onExit is registered only after onReady/spawnCorunner; spawn throw or early close hangs the parent.
2. HIGH — packages/explorer/README.md “Try it locally” still shows bare flatbread start.
3. MED — Endpoint fallback still gates same-origin /graphql on window; relative ?endpoint=/ stays SPA / while absolute origin / becomes /graphql.
4. MED — Public setExplorerStaticDirOverride; non-serial openPath tests can race it; welcome/--open still snapshot open path at parent config-load; --open sequencer still untested end-to-end.

Coverage plan (priority)

• ready.test.ts — spawnCorunner throws after ready → parent still exits; child close before post-ready listener.
• endpoints.test.ts — no-window + injected origin; normalizeGraphqlUrl('/') vs absolute-origin empty path agree; window same-origin happy path.
• liveServer.test.ts — ENOENT retry; non-transient reject; opts.ignore; unsubscribe swallow/reject.
• explorerMount.test.ts — HTML without </head> still gets bootstrap.

Perspectives: correctness, coverage, cli-runtime, explorer-package, docs. Models: grok-4.5 high / composer-2.5.

  

_{Sent by Cursor Automation: Flatbread PR Review}

[cursor]

MED (consensus) — No-query/no-bootstrap fallback still requires typeof window !== 'undefined', so an injected http(s) locationOrigin (no window) is ignored and callers get localhost:5057. That undercuts the same injectable-origin contract just fixed for ?endpoint=.

Minimal fix: Honor http(s) locationOrigin without a window gate; add a no-window + injected-origin edge test.

[cursor]

MED (still open) — setExplorerStaticDirOverride remains on the package’s public Node entry. JSDoc says tests-only; any production caller can still mutate this process-global seam.

Minimal fix: Drop it from the default export (test-only subpath or inject through mountExplorer deps), and keep remaining consumers test.serial.

[cursor]

MED (still open) — Welcome/resolveOpenPath still snapshot at parent config-load, while --open re-resolves after ready and the child mounts independently. An asset flip in that window desyncs the banner from the launched tab (and under --watch neither refreshes).

Minimal fix: Derive welcome URLs from the same post-ready resolution used by --open (or child-reported mount state).

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Review verdict

COMMENT — ba1be3f closed the prior HIGH blockers (?endpoint=/ → /graphql, sync spawnCorunner throw → exit 1, PATH for explorer README / skill §4). Remaining items are MED: whitespace ?endpoint= still hardcodes :5057, corunner async error without close, onReady before a failed spawn, public test-only override docs, and a few untested watch/teardown contracts. No consensus HIGH.

Tip fixes verified

• Relative ?endpoint=/ maps to /graphql (absolute / path already did).
• Sync spawn failure logs and onExit(1) instead of an uncaught exception.
• openPath.test.ts is fully serial over setExplorerStaticDirOverride.
• Skill/explorer “Try it locally” uses npx flatbread start.

Chunk-bound feedback (priority)

1. MED endpoints.ts — whitespace-only ?endpoint= ignores locationOrigin (hardcoded :5057).
2. MED (consensus) corunner — register error as well as close after spawn.
3. MED ready.ts — defer onReady until after successful corunner spawn.
4. MED public setExplorerStaticDirOverride — document as test-only in the README export table.
5. MED (coverage) rejected replaceConfig must not flip server.explorer; EINVAL unsubscribe swallow needs a negative test.
6. MED staticDir.test.ts — nest/concurrency: 1 + pin package-root path.

Coverage plan (short)

• endpoints.test.ts — whitespace ?endpoint= with non-5057 locationOrigin; optional window-stubbed same-origin.
• ready.test.ts — corunner error without close; onReady not called when spawn throws.
• liveServer*.test.ts — rejected replaceConfig; unsubscribe EINVAL vs other errors.
• explorerMount.test.ts — HTML without </head> still injects bootstrap.

Reviewer scoreboard

• correctness-and-contracts: 0 findings, 3 coverage gaps, signal:LOW
• test-coverage-robustness: 6 findings, 6 coverage gaps, signal:MED
• cli-and-runtime: 4 findings, 4 coverage gaps, signal:MED
• explorer-package: 3 findings, 4 coverage gaps, signal:MED
• docs-and-positioning: 0 findings, 0 coverage gaps, signal:LOW

Perspectives: correctness, coverage, cli-runtime, explorer-package, docs. Models: grok-4.5 high / composer-2.5. Not dependency-only (79 non-dep files).

  

_{Sent by Cursor Automation: Flatbread PR Review}

[cursor]

MED — After trim(), empty/whitespace returns hardcoded http://localhost:5057/graphql, ignoring locationOrigin. So ?endpoint=%20%20%20 on :5173/:9999 skips bootstrap and never gets same-origin /graphql.

ba1be3f fixed relative ?endpoint=/. Treat whitespace-only ?endpoint= as absent (fall through), and for empty trim in normalizeGraphqlUrl return new URL(DEFAULT_GRAPHQL_PATH, locationOrigin).href. Re-assert in endpoints.test.ts with a non-5057 origin.

[cursor]

MED (consensus) — After a successful spawn, only close is registered on the corunner. Node may emit error without close, leaving GraphQL up and a silent parent.

Register error on the spawned corunner (mirror gql pre-ready handling) and exit non-zero. Cover in ready.test.ts: corunner emits error without close → parent exits non-zero.

[cursor]

MED — onReady (and thus --open) runs before spawnCorunner. A sync spawn failure still opens the browser, then exits 1.

Defer onReady until after a successful corunner spawn; keep the current order for server-only. Assert in ready.test.ts that onReady is not invoked when spawnCorunner throws.

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MED (still open) — setExplorerStaticDirOverride ships on the package’s only public "." entry. JSDoc says tests-only; the README export table omits it, so integrators can still mutate process-global static resolution.

Prefer an explicit “test-only” row in the README table over hiding the export (flatbread AVA files need this seam). Keep within-file serialization wherever the override is used.

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MED (coverage) — Explorer gate updates only when replaceConfig returns committed. Tests exercise successful reload only.

Add a rejected replaceConfig case in liveServerExplorerWatch.test.ts and assert server.explorer stays put.

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MED (coverage) — unsubscribe EINVAL (“Unable to remove watcher”) is swallowed with no test; non-matching errors must still propagate.

Stub unsubscribe to throw matching vs non-matching errors; assert close() resolves only for the former (liveServer.test.ts).

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MED (consensus) — Module-global override + top-level afterEach can race if Node’s runner runs the two root describes concurrently; basename-only asserts do not pin package-root resolution.

Nest suites under one parent describe (or { concurrency: 1 }); pin the resolved path against package root / override, not basename shape alone.