diff --git a/plugins/inspect/package.json b/plugins/inspect/package.json
index 7422cc83..dc42a8b7 100644
--- a/plugins/inspect/package.json
+++ b/plugins/inspect/package.json
@@ -56,7 +56,6 @@
     }
   },
   "dependencies": {
-    "@valibot/to-json-schema": "catalog:deps",
     "cac": "catalog:deps",
     "nostics": "catalog:deps"
   },
diff --git a/plugins/inspect/src/rpc/functions/_schema.ts b/plugins/inspect/src/rpc/functions/_schema.ts
index 0562e26e..aec5db43 100644
--- a/plugins/inspect/src/rpc/functions/_schema.ts
+++ b/plugins/inspect/src/rpc/functions/_schema.ts
@@ -1,5 +1,4 @@
 import type { StandardJSONSchemaV1, StandardSchemaV1 } from '@standard-schema/spec'
-import { toJsonSchema } from '@valibot/to-json-schema'
 
 const FALLBACK_SCHEMA = Object.freeze({ type: 'object', additionalProperties: true })
 
@@ -9,17 +8,19 @@ type MaybeJsonSchema = StandardSchemaV1['~standard'] & Partial<StandardJSONSchem
 /**
  * Convert a schema to JSON Schema for the inspector, vendor-neutrally.
  *
- * Prefers the schema's own Standard JSON Schema converter
- * (`~standard.jsonSchema`, implemented by e.g. zod 4), then falls back to
- * valibot's converter, then to a permissive object — so introspection never
- * throws regardless of which validator produced the schema.
+ * Uses the schema's own [Standard JSON Schema](https://standardschema.dev/)
+ * converter (`~standard.jsonSchema`, implemented by e.g. zod 4) when the
+ * validator provides one, and degrades to a permissive object schema
+ * otherwise (e.g. valibot, which has no native converter) — so introspection
+ * never throws and never pulls in a converter library for a validator devframe
+ * doesn't otherwise depend on.
  */
 function convert(schema: unknown): unknown {
   const standard = (schema as StandardSchemaV1)['~standard'] as MaybeJsonSchema
+  if (!standard.jsonSchema)
+    return FALLBACK_SCHEMA
   try {
-    if (standard.jsonSchema)
-      return standard.jsonSchema.input({ target: 'draft-2020-12' })
-    return toJsonSchema(schema as never)
+    return standard.jsonSchema.input({ target: 'draft-2020-12' })
   }
   catch {
     return FALLBACK_SCHEMA
diff --git a/plugins/inspect/src/types.ts b/plugins/inspect/src/types.ts
index 1e369a49..8e402d34 100644
--- a/plugins/inspect/src/types.ts
+++ b/plugins/inspect/src/types.ts
@@ -18,8 +18,8 @@ export interface RpcFunctionAgentInfo {
 /**
  * Serializable description of a single registered RPC function. Returned
  * by `devframes:plugin:inspect:list-functions`. JSON-safe by construction
- * — valibot schemas are projected to JSON Schema (best effort), never
- * sent as live objects.
+ * — Standard Schema args/return schemas are projected to JSON Schema (best
+ * effort), never sent as live objects.
  */
 export interface RpcFunctionInfo {
   /** Full namespaced function name (e.g. `my-plugin:do-thing`). */
@@ -32,9 +32,9 @@ export interface RpcFunctionInfo {
   snapshot: boolean
   /** Whether results may be cached client-side. */
   cacheable: boolean
-  /** Whether an args valibot schema is declared. */
+  /** Whether an args schema is declared. */
   hasArgs: boolean
-  /** Whether a return valibot schema is declared. */
+  /** Whether a return schema is declared. */
   hasReturns: boolean
   /** Whether an explicit dump definition is declared. */
   hasDump: boolean
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e051e183..3e5d2958 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -58,9 +58,6 @@ catalogs:
     '@standard-schema/spec':
       specifier: ^1.1.0
       version: 1.1.0
-    '@valibot/to-json-schema':
-      specifier: ^1.7.1
-      version: 1.7.1
     birpc:
       specifier: ^4.1.0
       version: 4.1.0
@@ -1805,9 +1802,6 @@ importers:
 
   plugins/inspect:
     dependencies:
-      '@valibot/to-json-schema':
-        specifier: catalog:deps
-        version: 1.7.1(valibot@1.4.2(typescript@6.0.3))
       cac:
         specifier: catalog:deps
         version: 7.0.0
@@ -5590,11 +5584,6 @@ packages:
   '@upsetjs/venn.js@2.0.0':
     resolution: {integrity: sha512-WbBhLrooyePuQ1VZxrJjtLvTc4NVfpOyKx0sKqioq9bX1C1m7Jgykkn8gLrtwumBioXIqam8DLxp88Adbue6Hw==}
 
-  '@valibot/to-json-schema@1.7.1':
-    resolution: {integrity: sha512-3qkmU6KXWh8GIThEAW3kuRHPQBMjWkKy+Ppz3WkUucx53DTpOa6siMn4xDGSOhlVyMrDaJTCTMLYPZVAIk1P0A==}
-    peerDependencies:
-      valibot: ^1.4.0
-
   '@vercel/nft@1.5.0':
     resolution: {integrity: sha512-IWTDeIoWhQ7ZtRO/JRKH+jhmeQvZYhtGPmzw/QGDY+wDCQqfm25P9yIdoAFagu4fWsK4IwZXDFIjrmp5rRm/sA==}
     engines: {node: '>=20'}
@@ -14009,10 +13998,6 @@ snapshots:
       d3-selection: 3.0.0
       d3-transition: 3.0.1(d3-selection@3.0.0)
 
-  '@valibot/to-json-schema@1.7.1(valibot@1.4.2(typescript@6.0.3))':
-    dependencies:
-      valibot: 1.4.2(typescript@6.0.3)
-
   '@vercel/nft@1.5.0(rollup@4.60.3)(supports-color@10.2.2)':
     dependencies:
       '@mapbox/node-pre-gyp': 2.0.3(supports-color@10.2.2)
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 92e3b5ed..c06fe075 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -77,7 +77,6 @@ catalogs:
     '@modelcontextprotocol/client': ^2.0.0
     '@modelcontextprotocol/server': ^2.0.0
     '@standard-schema/spec': ^1.1.0
-    '@valibot/to-json-schema': ^1.7.1
     birpc: ^4.1.0
     cac: ^7.0.0
     chokidar: ^5.0.0