diff --git a/graph/javascript/engine/config-resolution/http-router-apps.dl b/graph/javascript/engine/config-resolution/http-router-apps.dl
index 41dafd035..d4bc21c2d 100644
--- a/graph/javascript/engine/config-resolution/http-router-apps.dl
+++ b/graph/javascript/engine/config-resolution/http-router-apps.dl
@@ -45,6 +45,11 @@ jr_url_path(raw, pkg, rest) :- jr_url_rest(raw, pkg, rest), substr(rest, 0, 1) =
 jr_url_path(raw, pkg, r2) :- jr_url_rest(raw, pkg, rest), substr(rest, 0, 1) = "@",
     j = min y : { y = range(0, strlen(rest)), substr(rest, y, 1) = "/" }, r2 = substr(rest, j, strlen(rest) - j).
 jr_spec(raw, pkg) :- jr_url_path(raw, pkg, "/mod.ts").
+// a published alias and its subpaths (`@hono/hono`, `@hono/hono/factory`): the package's own name. The alias must end
+// at a `/` or at the end, so another package that only starts with it (`@hono/hono-x`) is itself
+jr_spec(raw, pkg) :- jr_spec(raw, x), router_spec_alias(x, pkg).
+jr_spec(raw, cat(pkg, substr(x, strlen(a), strlen(x) - strlen(a)))) :- jr_spec(raw, x), router_spec_alias(a, pkg),
+    strlen(x) > strlen(a) + 1, substr(x, 0, strlen(a) + 1) = cat(a, "/").
 
 .decl jr_module(c0:symbol)
 jr_module(spec) :- router_app_class(spec, _).
diff --git a/graph/javascript/engine/config-resolution/knobs.dl b/graph/javascript/engine/config-resolution/knobs.dl
index 8c9f20a34..ad8477249 100644
--- a/graph/javascript/engine/config-resolution/knobs.dl
+++ b/graph/javascript/engine/config-resolution/knobs.dl
@@ -30,6 +30,10 @@ router_spec_url("https://deno.land/x/hono", "hono").
 router_spec_url("https://esm.sh/hono", "hono").
 // the JSR name of the package
 router_app_class("@hono/hono", "Hono").
+// router_spec_alias(Published, Package): a package published under another name, whose subpaths are the package's
+// (`@hono/hono/factory`, as an import map's key or after `jsr:`, is `hono/factory`)
+.decl router_spec_alias(c0:symbol, c1:symbol)
+router_spec_alias("@hono/hono", "hono").
 // router_verb(Method, Verb): a route registration and the verb it serves
 .decl router_verb(c0:symbol, c1:symbol)
 router_verb("get", "GET").       router_verb("post", "POST").
diff --git a/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/deno.json b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/deno.json
new file mode 100644
index 000000000..2ccaa35e1
--- /dev/null
+++ b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/deno.json
@@ -0,0 +1,6 @@
+{
+  "imports": {
+    "@hono/hono": "jsr:@hono/hono@^4",
+    "@hono/hono-kit/": "./kit/"
+  }
+}
diff --git a/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/kit/factory.ts b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/kit/factory.ts
new file mode 100644
index 000000000..8bc02dff6
--- /dev/null
+++ b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/kit/factory.ts
@@ -0,0 +1,5 @@
+// not Hono's factory: the function it returns runs, never the one it is given
+type Step = (c: unknown, next: () => Promise<void>) => Promise<void>
+export const createMiddleware = (_inner: Step): Step => async (_c, next) => {
+  await next()
+}
diff --git a/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/main.ts b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/main.ts
new file mode 100644
index 000000000..ff643530b
--- /dev/null
+++ b/graph/test/typescript/hono/cases/deno/jsr-name-subpath/src/main.ts
@@ -0,0 +1,19 @@
+// census: an import map keyed by the JSR name (@hono/hono) and its subpaths imported under that name
+// (@hono/hono/factory): createMiddleware's argument is the middleware. Look-alike: a local module whose
+// specifier only starts with the JSR name (@hono/hono-kit/factory): its createMiddleware is a project function.
+import { Hono } from '@hono/hono'
+import { createMiddleware } from '@hono/hono/factory'
+import { createMiddleware as kitMiddleware } from '@hono/hono-kit/factory'
+
+const auth = createMiddleware(async (c, next) => {
+  await next()
+})
+const counted = kitMiddleware(async (c, next) => {
+  await next()
+})
+const app = new Hono()
+app.use('/admin/*', auth)
+app.get('/admin/users', (c) => c.json([]))
+app.get('/open', counted, (c) => c.text('open'))
+
+Deno.serve(app.fetch)
diff --git a/graph/test/typescript/hono/cases/openapi/route-builder/src/builder.ts b/graph/test/typescript/hono/cases/openapi/route-builder/src/builder.ts
new file mode 100644
index 000000000..645e030e2
--- /dev/null
+++ b/graph/test/typescript/hono/cases/openapi/route-builder/src/builder.ts
@@ -0,0 +1,27 @@
+import { createRoute, type RouteConfig, type RouteHandler } from '@hono/zod-openapi'
+import type { MiddlewareHandler } from 'hono'
+
+export function requireKey(): MiddlewareHandler {
+  return async (c, next) => {
+    if (!c.req.header('x-key')) return c.text('no key', 401)
+    await next()
+  }
+}
+
+// A route builder: the definition it is called with is the route, and `.handler(fn)` hands back both, for the app
+// to register in one call: `app.openapi(ep.route, ep.handler)`.
+export const defineEndpoint = <R extends RouteConfig>(config: R) => {
+  const route = createRoute(config)
+  const handler = (fn: RouteHandler<typeof route>) => ({ handler: fn, route: route })
+  return { handler }
+}
+
+// A builder made per API version: the definition is spread into the one it builds, which adds the key check
+export const versioned = (_version: string) => {
+  const define = <R extends RouteConfig>(config: R) => {
+    const route = createRoute({ ...config, middleware: [requireKey()] as const })
+    const handler = (fn: RouteHandler<typeof route>) => ({ handler: fn, route })
+    return { handler }
+  }
+  return { define }
+}
diff --git a/graph/test/typescript/hono/cases/openapi/route-builder/src/index.ts b/graph/test/typescript/hono/cases/openapi/route-builder/src/index.ts
new file mode 100644
index 000000000..3f85ec7c6
--- /dev/null
+++ b/graph/test/typescript/hono/cases/openapi/route-builder/src/index.ts
@@ -0,0 +1,14 @@
+// census: create_route, openapi_register, new_openapihono (route builder: a project helper returns { route, handler }
+// for each definition and the app registers both: app.openapi(ep.route, ep.handler); a plain builder and a version-scoped
+// builder whose definition is spread into createRoute with the builder's own middleware).
+// Look-alikes: an endpoint the builder made that nothing registers, and `.openapi(..)` on an object that is no app.
+import { OpenAPIHono } from '@hono/zod-openapi'
+import { draft, getItem, listItems } from './routes'
+
+const docs = { openapi: (_route: unknown, _handler: unknown) => undefined }
+const app = new OpenAPIHono()
+app.openapi(getItem.route, getItem.handler)
+app.openapi(listItems.route, listItems.handler)
+docs.openapi(draft.route, draft.handler)
+
+export default app
diff --git a/graph/test/typescript/hono/cases/openapi/route-builder/src/routes.ts b/graph/test/typescript/hono/cases/openapi/route-builder/src/routes.ts
new file mode 100644
index 000000000..ff6f1dfdf
--- /dev/null
+++ b/graph/test/typescript/hono/cases/openapi/route-builder/src/routes.ts
@@ -0,0 +1,24 @@
+import { z } from '@hono/zod-openapi'
+import { defineEndpoint, versioned } from './builder'
+
+const v1 = versioned('v1')
+
+export const getItem = defineEndpoint({
+  method: 'get',
+  path: '/items/{id}',
+  request: { params: z.object({ id: z.string() }) },
+  responses: { 200: { description: 'one item' } },
+}).handler(async (c) => c.json({ id: c.req.valid('param').id }, 200))
+
+export const listItems = v1.define({
+  method: 'get',
+  path: '/v1/items',
+  responses: { 200: { description: 'every item' } },
+}).handler(async (c) => c.json([], 200))
+
+// built but never registered: no route
+export const draft = defineEndpoint({
+  method: 'post',
+  path: '/drafts',
+  responses: { 201: { description: 'made' } },
+}).handler(async (c) => c.json({}, 201))
diff --git a/graph/test/typescript/hono/expected/deno/jsr-name-subpath.entries b/graph/test/typescript/hono/expected/deno/jsr-name-subpath.entries
new file mode 100644
index 000000000..05d5840c6
--- /dev/null
+++ b/graph/test/typescript/hono/expected/deno/jsr-name-subpath.entries
@@ -0,0 +1,6 @@
+# hand-reviewed 2026-11-04 against the fixture and the oracle: @hono/hono and @hono/hono/factory named by the import map key; the factory's argument is the middleware of /admin/users; the @hono/hono-kit look-alike is a project function, so what it returns is the middleware of /open
+# census: an import map keyed by the JSR name (@hono/hono) and its subpaths imported under that name
+entry	kit/factory.ts:3:57	http
+entry	main.ts:16:25	http
+entry	main.ts:17:27	http
+entry	main.ts:8:31	http
diff --git a/graph/test/typescript/hono/expected/deno/jsr-name-subpath.tsv b/graph/test/typescript/hono/expected/deno/jsr-name-subpath.tsv
new file mode 100644
index 000000000..e8826197c
--- /dev/null
+++ b/graph/test/typescript/hono/expected/deno/jsr-name-subpath.tsv
@@ -0,0 +1,8 @@
+# hand-reviewed 2026-11-04 against the fixture and the oracle: @hono/hono and @hono/hono/factory named by the import map key; the factory's argument is the middleware of /admin/users; the @hono/hono-kit look-alike is a project function, so what it returns is the middleware of /open
+# census: an import map keyed by the JSR name (@hono/hono) and its subpaths imported under that name
+route	GET	/admin/users	main.ts:16:25	main.ts:14:13	1
+route	GET	/open	main.ts:17:27	main.ts:14:13	3
+mw	main.ts:8:31	main.ts:16:25	GET	/admin/users	0	main.ts:14:13
+mw	kit/factory.ts:3:57	main.ts:17:27	GET	/open	0	main.ts:14:13
+regby	main.ts:1:1	main.ts:16:25	GET	/admin/users	main.ts:14:13
+regby	main.ts:1:1	main.ts:17:27	GET	/open	main.ts:14:13
diff --git a/graph/test/typescript/hono/expected/openapi/route-builder.entries b/graph/test/typescript/hono/expected/openapi/route-builder.entries
new file mode 100644
index 000000000..257fe65b7
--- /dev/null
+++ b/graph/test/typescript/hono/expected/openapi/route-builder.entries
@@ -0,0 +1,5 @@
+# hand-reviewed 2026-11-04 against the fixture and the oracle's runtime half (the static half cannot follow a closure's local through the builder and reports both registrations unknown: an oracle gap): GET /items/:id with its param schema, GET /v1/items with the version builder's key check at position 0; the never-registered /drafts and the docs.openapi look-alike are no route
+# census: create_route, openapi_register, new_openapihono (route builder: a project helper returns { route, handler }
+entry	builder.ts:5:10	http
+entry	routes.ts:11:12	http
+entry	routes.ts:17:12	http
diff --git a/graph/test/typescript/hono/expected/openapi/route-builder.tsv b/graph/test/typescript/hono/expected/openapi/route-builder.tsv
new file mode 100644
index 000000000..e5488ce89
--- /dev/null
+++ b/graph/test/typescript/hono/expected/openapi/route-builder.tsv
@@ -0,0 +1,8 @@
+# hand-reviewed 2026-11-04 against the fixture and the oracle's runtime half (the static half cannot follow a closure's local through the builder and reports both registrations unknown: an oracle gap): GET /items/:id with its param schema, GET /v1/items with the version builder's key check at position 0; the never-registered /drafts and the docs.openapi look-alike are no route
+# census: create_route, openapi_register, new_openapihono (route builder: a project helper returns { route, handler }
+route	GET	/items/:id	routes.ts:11:12	index.ts:9:13	0
+route	GET	/v1/items	routes.ts:17:12	index.ts:9:13	1
+mw	builder.ts:5:10	routes.ts:17:12	GET	/v1/items	0	index.ts:9:13
+schema	routes.ts:11:12	param	expr@routes.ts:9:22
+regby	index.ts:1:1	routes.ts:11:12	GET	/items/:id	index.ts:9:13
+regby	index.ts:1:1	routes.ts:17:12	GET	/v1/items	index.ts:9:13
diff --git a/graph/typescript/engine/config-resolution/http-router-apps.dl b/graph/typescript/engine/config-resolution/http-router-apps.dl
index 2e29dcd35..e9a73afd3 100644
--- a/graph/typescript/engine/config-resolution/http-router-apps.dl
+++ b/graph/typescript/engine/config-resolution/http-router-apps.dl
@@ -58,6 +58,11 @@ hr_url_path(raw, pkg, rest) :- hr_url_rest(raw, pkg, rest), substr(rest, 0, 1) =
 hr_url_path(raw, pkg, r2) :- hr_url_rest(raw, pkg, rest), substr(rest, 0, 1) = "@",
     j = min y : { y = range(0, strlen(rest)), substr(rest, y, 1) = "/" }, r2 = substr(rest, j, strlen(rest) - j).
 hr_spec(raw, pkg) :- hr_url_path(raw, pkg, "/mod.ts").
+// a published alias and its subpaths (`@hono/hono`, `@hono/hono/factory`): the package's own name. The alias must end
+// at a `/` or at the end, so another package that only starts with it (`@hono/hono-x`) is itself
+hr_spec(raw, pkg) :- hr_spec(raw, x), router_spec_alias(x, pkg).
+hr_spec(raw, cat(pkg, substr(x, strlen(a), strlen(x) - strlen(a)))) :- hr_spec(raw, x), router_spec_alias(a, pkg),
+    strlen(x) > strlen(a) + 1, substr(x, 0, strlen(a) + 1) = cat(a, "/").
 .decl hr_import_spec(c0:symbol, c1:symbol)
 hr_import_spec(ih, s) :- rd_import_path(ih, raw), hr_spec(raw, s).
 
@@ -501,6 +506,48 @@ hr_def_param(y, p) :- hr_def_param_need(y), expr_kind("client", k, _, y), expr_k
 hr_def_val(e, o) :- hr_def_val(i, o), var_initializer("client", _, i, v), module_export_any("client", m, n, "VARIABLE", v),
     import_binds_namespace(ih, "client", m), expr_referenced("client", "IMPORT_BINDING", ih, r),
     expr_child("client", e, "RECEIVER", _, r), property_access_name(e, n).
+// …a route BUILDER: a project function W returns an object whose method H (a closure of W) hands back `{ route,
+// handler }` (`const ep = defineEndpoint({ method, path, .. }).handler(async (c) => ..)`, then
+// `app.openapi(ep.route, ep.handler)`). Each such method call is its own route: the definition is what W's call was given
+// (createRoute(config) of W's parameter, or of an object W spreads it into, which adds W's own keys), the handler the
+// method call's argument (http-router-routes.dl hr_bld_arg). Read only from a registration's `.route` / `.handler`
+// argument, never for every object a call returns.
+.decl hr_bld_need(c0:symbol)
+hr_bld_need(q) :- hr_reg(ce, _, cn), router_openapi(cn), expr_child("client", ce, "ARGUMENT", pos, a), (pos = "0" ; pos = "1"),
+    property_access_name(a, _), expr_child("client", a, "RECEIVER", _, q).
+hr_bld_need(i) :- hr_bld_need(x), hr_denotes_var(x, v), var_initializer("client", _, i, v), i != "".
+hr_bld_need(c) :- hr_bld_need(x), expr_kind("client", k, _, x), (expr_kind_is_transparent(k) ; k = "AWAIT_EXPRESSION"),
+    expr_child("client", x, _, _, c).
+// (method call, an expression its callee returns, or one inside it through parentheses and casts)
+.decl hr_bld_ret(c0:symbol, c1:symbol)
+hr_bld_ret(x, e) :- hr_bld_need(x), call_site("client", "METHOD_CALL", _, _, _, x, _), hr_call_of(x, h), hr_ret_expr(h, e).
+hr_bld_ret(x, c) :- hr_bld_ret(x, e), expr_kind("client", k, _, e), expr_kind_is_transparent(k), expr_child("client", e, _, _, c).
+// (expression, the method call it is, the method, the object literal it returns)
+.decl hr_bld_call(c0:symbol, c1:symbol, c2:symbol, c3:symbol)
+hr_bld_call(x, x, h, o) :- hr_bld_ret(x, o), expr_kind("client", "OBJECT_LITERAL", _, o), hr_call_of(x, h), hr_ret_expr(h, _).
+hr_bld_call(x, c, h, o) :- hr_bld_need(x), hr_denotes_var(x, v), var_initializer("client", _, i, v), i != "", hr_bld_call(i, c, h, o).
+hr_bld_call(x, c, h, o) :- hr_bld_need(x), expr_kind("client", k, _, x), (expr_kind_is_transparent(k) ; k = "AWAIT_EXPRESSION"),
+    expr_child("client", x, _, _, y), hr_bld_call(y, c, h, o).
+// (registration argument `ep.route`, the call of W the method was called on, the createRoute call W made, its argument)
+.decl hr_bld_route(c0:symbol, c1:symbol, c2:symbol, c3:symbol)
+hr_bld_route(e, c1, d, a) :- hr_reg(ce, _, cn), router_openapi(cn), expr_child("client", ce, "ARGUMENT", "0", e),
+    property_access_name(e, n), expr_child("client", e, "RECEIVER", _, q), hr_bld_call(q, c, _, o), rd_obj_prop(o, n, v),
+    hr_denotes_var(v, rv), var_initializer("client", _, d, rv), d != "",
+    call_site("client", "FUNCTION_CALL", _, _, _, d, _), expr_child("client", d, "METHOD_NAME", _, f),
+    expr_referenced("client", "IMPORT_BINDING", ih, f), import_binding("client", _, _, orig, _, ih), hr_import_spec(ih, spec),
+    router_route_def(spec, orig), expr_child("client", d, "ARGUMENT", "0", a),
+    call_site("client", "METHOD_CALL", _, _, c1, c, _), c1 != "".
+// the object createRoute is given in W (in place or a const), with W's own keys
+hr_def_val(e, o) :- hr_bld_route(e, _, d, _), hr_def_val(d, o).
+hr_def_param_need(a) :- hr_bld_route(_, _, _, a).
+// …and what W's call was given: W's parameter passed on, or spread into that object
+.decl hr_bld_cfg(c0:symbol, c1:symbol)
+hr_bld_cfg(e, y) :- hr_bld_route(e, c1, _, a), hr_def_param(a, p), hr_call_of(c1, w), param_decl("client", _, pos, _, w, p),
+    expr_child("client", c1, "ARGUMENT", pos, y).
+hr_bld_cfg(e, y) :- hr_bld_route(e, c1, _, a), hr_def_obj(a, o), expr_child("client", o, "SPREAD_OPERAND", _, sx), hv_spread_src(sx, z),
+    hr_def_param(z, p), hr_call_of(c1, w), param_decl("client", _, pos, _, w, p), expr_child("client", c1, "ARGUMENT", pos, y).
+hr_def_obj_need(y) :- hr_bld_cfg(_, y).
+hr_def_val(e, o2) :- hr_bld_cfg(e, y), hr_def_obj(y, o2).
 .decl hr_openapi_def(c0:symbol, c1:symbol)
 hr_openapi_def(ce, o) :- hr_reg(ce, _, cn), router_openapi(cn), expr_child("client", ce, "ARGUMENT", "0", x), hr_def_val(x, o).
 rd_demand(v) :- hr_openapi_def(_, o), rd_obj_prop(o, k, v), (router_def_key(k, "method") ; router_def_key(k, "path")).
diff --git a/graph/typescript/engine/config-resolution/http-router-routes.dl b/graph/typescript/engine/config-resolution/http-router-routes.dl
index e638361e2..a767382f6 100644
--- a/graph/typescript/engine/config-resolution/http-router-routes.dl
+++ b/graph/typescript/engine/config-resolution/http-router-routes.dl
@@ -187,6 +187,13 @@ hr_fprop(a, v) :- hr_farg(a), property_access_name(a, n), expr_child("client", a
 hr_fprop(a, v) :- hr_farg(a), expr_referenced("client", "VARIABLE", d, a), var_binding("client", _, "PROPERTY", src, i, d), i != "",
     hr_fobj(i, o), rd_obj_prop(o, src, v).
 hr_farg(v) :- hr_fprop(_, v).
+// a route builder's `.handler` (http-router-apps.dl hr_bld_call): the property is the method's own parameter, so its value
+// is that method call's argument (`({ handler: fn, route })` returned by `.handler(fn)`)
+.decl hr_bld_arg(c0:symbol, c1:symbol)
+hr_bld_arg(a, y) :- hr_farg(a), property_access_name(a, n), expr_child("client", a, "RECEIVER", _, q), hr_bld_call(q, c, h, o),
+    rd_obj_prop(o, n, v), expr_referenced("client", "PARAMETER", p, v), param_decl("client", _, pos, _, h, p),
+    expr_child("client", c, "ARGUMENT", pos, y).
+hr_farg(y) :- hr_bld_arg(_, y).
 .decl hr_wrapper_call(c0:symbol)
 hr_wrapper_call(a) :- call_site("client", "METHOD_CALL", cn, _, r, a, _), router_factory_mw(cn), hr_factory_val(r, _).
 hr_wrapper_call(a) :- hr_detached(a, n, _), router_factory_mw(n).
@@ -212,6 +219,7 @@ hr_fn(a, m) :- hr_farg(a), hr_call_of(a, f), hr_ret_expr(f, e), hr_fn(e, m).
 hr_fn(a, m) :- hr_farg(a), hr_wrapper_call(a), expr_child("client", a, "ARGUMENT", "0", x), hr_fn(x, m).
 hr_fn(a, m) :- hr_farg(a), hr_assign_call(a), expr_child("client", a, "ARGUMENT", "0", x), hr_fn(x, m).
 hr_fn(a, m) :- hr_fprop(a, v), hr_fn(v, m).
+hr_fn(a, m) :- hr_bld_arg(a, y), hr_fn(y, m).
 hr_fn(a, m) :- hr_farg(a), expr_kind("client", k, _, a), expr_kind_is_transparent(k),
     expr_child("client", a, _, _, c), hr_fn(c, m).
 
diff --git a/graph/typescript/engine/config-resolution/knobs.dl b/graph/typescript/engine/config-resolution/knobs.dl
index 87c876ff6..46bf4395a 100644
--- a/graph/typescript/engine/config-resolution/knobs.dl
+++ b/graph/typescript/engine/config-resolution/knobs.dl
@@ -288,6 +288,10 @@ router_spec_url("https://deno.land/x/hono", "hono").
 router_spec_url("https://esm.sh/hono", "hono").
 // the JSR name of the package
 router_app_class("@hono/hono", "Hono").
+// router_spec_alias(Published, Package): a package published under another name, whose subpaths are the package's
+// (`@hono/hono/factory`, as an import map's key or after `jsr:`, is `hono/factory`)
+.decl router_spec_alias(c0:symbol, c1:symbol)
+router_spec_alias("@hono/hono", "hono").
 // router_verb(Method, Verb): a route registration and the verb it serves
 .decl router_verb(c0:symbol, c1:symbol)
 router_verb("get", "GET").       router_verb("post", "POST").