Fix invariant config validation readiness

scripts/test-invariants.spec.ts

@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
-import { Context, FiberState, Service } from 'cordis'
+import { Context, FiberState, Service, ValidationError } from 'cordis'
 import Loader from '@cordisjs/plugin-loader'
+import z from 'schemastery'
 import InvariantService from '@deepseek-ai/dsh-invariants'
 import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 import { packageInvariantOwners } from './package-invariants.ts'
@@ -136,6 +137,35 @@ describe('global test invariant host', () => {
     expect(usesManualInvariantTree('/repo/packages/core/session/tests/session.spec.ts')).toBe(false)
   })
 
+  it('preserves config validation failures without starting the rejected plugin', async () => {
+    const ctx = new Context()
+    const apply = vi.fn(function invalidConfigApply() {
+      throw new Error('invalid plugin apply executed')
+    })
+    const plugin = {
+      apply,
+      Config: z.object({
+        requiredValue: z.string().required(),
+      }),
+    }
+
+    const fiber = ctx.plugin(plugin, {})
+    const firstError: unknown = await fiber.then(
+      () => undefined,
+      (error: unknown) => error,
+    )
+    expect(firstError).toBeInstanceOf(ValidationError)
+    expect(firstError).toHaveProperty('message', expect.stringMatching(/requiredValue/))
+    await ctx.plugin(TestInvariantProbe)
+    const secondError: unknown = await fiber.then(
+      () => undefined,
+      (error: unknown) => error,
+    )
+    expect(secondError).toBe(firstError)
+    expect(fiber.state).toBe(FiberState.DISPOSED)
+    expect(apply).not.toHaveBeenCalled()
+  })
+
   it('holds a root plugin until every lazy companion is active, then permits nested startup', async () => {
     const delayedStarted = deferred()
     const releaseDelayed = deferred()

scripts/test-invariants.ts

@@ -75,7 +75,9 @@ RegistryService.prototype.plugin = function(plugin: Plugin, config?: unknown, ge
   if (hasBarrierOwner(host, this.ctx)) {
     return originalPlugin.call(this, plugin, config, getOuterStack)
   }
-  if (callback === undefined) return originalPlugin.call(this, plugin, config, getOuterStack)
+  if (callback === undefined) {
+    return originalPlugin.call(this, plugin, config, getOuterStack)
+  }
 
   const fiber = originalPlugin.call(
     this,
@@ -84,7 +86,7 @@ RegistryService.prototype.plugin = function(plugin: Plugin, config?: unknown, ge
     getOuterStack,
   )
   host.barrierOwners.add(fiber.ctx.fiber)
-  return joinInvariantStartup(fiber, host.ready)
+  return joinInvariantStartup(fiber, host.ready, true)
 }
 
 /**
@@ -204,8 +206,21 @@ function withInvariantReadiness(plugin: Plugin, callback: PluginCallback): Plugi
   }
 }
 
-function joinInvariantStartup(fiber: PluginFiber, invariantReady: Promise<void>): PluginFiber {
-  const readiness = invariantReady.then(() => fiber.await())
+function joinInvariantStartup(
+  fiber: PluginFiber,
+  invariantReady: Promise<void>,
+  disposePendingFailure = false,
+): PluginFiber {
+  const initialized = disposePendingFailure
+    ? fiber.await().catch(async (error: unknown) => {
+      // Config validation is the only failure recorded while a gated fiber
+      // is still PENDING. Dispose it before readiness publication can
+      // refresh the rejected fiber with its uninitialized config.
+      if (fiber.state === FiberState.PENDING) await fiber.dispose()
+      throw error
+    })
+    : Promise.resolve()
+  const readiness = initialized.then(() => invariantReady).then(() => fiber.await())
   const joined = Object.create(fiber) as PluginFiber
   joined.then = readiness.then.bind(readiness)
   return joined