diff --git a/.changeset/fair-subagents-route.md b/.changeset/fair-subagents-route.md
new file mode 100644
index 00000000000..a1d2775fc90
--- /dev/null
+++ b/.changeset/fair-subagents-route.md
@@ -0,0 +1,5 @@
+---
+"@kilocode/cli": patch
+---
+
+Keep config-defined subagents routable when an installed primary agent uses the same name.
diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index 5d08de3794c..cdd433b92ab 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -490,6 +490,7 @@ export const layer = Layer.effect(
           result = mergeConfigConcatArrays(result, { agent: orgModes.agents })
         }
         warnings.push(...orgModes.warnings)
+        let configuredAgents = { ...(result.agent ?? {}) }
         // kilocode_change end
 
         const authEnv: Record<string, string> = {}
@@ -549,6 +550,7 @@ export const layer = Layer.effect(
           const trusted = sourceTrusted ?? scope === "global"
           const scoped = KilocodeConfig.scopeIndexing(SandboxConfig.scope(next, scope), scope)
           result = mergeConfigConcatArrays(result, scoped)
+          if (scoped.agent) configuredAgents = mergeDeep(configuredAgents, scoped.agent)
           if (next.instructions?.length) {
             result.instruction_origins = origins(result.instruction_origins, next.instructions, trusted, source)
           }
@@ -765,13 +767,15 @@ export const layer = Layer.effect(
             result.command ?? {},
             yield* Effect.promise(() => ConfigCommand.load(dir, warnings, dirTrusted, dirFileScope, dirSourceScope)),
           )
-          result.agent = mergeDeep(
+          result.agent = KilocodeConfig.mergeAgentMarkdown(
             result.agent ?? {},
             yield* Effect.promise(() => ConfigAgent.load(dir, warnings, dirTrusted, dirFileScope, dirSourceScope)),
+            configuredAgents,
           )
-          result.agent = mergeDeep(
+          result.agent = KilocodeConfig.mergeAgentMarkdown(
             result.agent ?? {},
             yield* Effect.promise(() => ConfigAgent.loadMode(dir, warnings, dirTrusted, dirFileScope, dirSourceScope)),
+            configuredAgents,
           )
           // kilocode_change end
           // kilocode_change - Auto-discovered plugins under config directories are already local files, so ConfigPlugin.load
diff --git a/packages/opencode/src/kilocode/config/config.ts b/packages/opencode/src/kilocode/config/config.ts
index f98a0b8ffa8..d47a9a9a2b1 100644
--- a/packages/opencode/src/kilocode/config/config.ts
+++ b/packages/opencode/src/kilocode/config/config.ts
@@ -181,6 +181,35 @@ export namespace KilocodeConfig {
     return stripGlobalIndexing(info)
   }
 
+  /**
+   * Merge discovered agent markdown while preserving routing explicitly defined
+   * in config. Tracking config entries separately keeps normal directory
+   * precedence between markdown files intact.
+   */
+  export function mergeAgentMarkdown(
+    existing: Record<string, ConfigAgentV1.Info>,
+    incoming: Record<string, ConfigAgentV1.Info>,
+    configured: Record<string, ConfigAgentV1.Info>,
+  ) {
+    const result = { ...existing }
+    for (const [name, agent] of Object.entries(incoming)) {
+      const current = result[name]
+      if (!current) {
+        result[name] = agent
+        continue
+      }
+
+      const config = configured[name]
+      if (agent.mode === "primary" && config && config.mode !== "primary") {
+        result[name] = mergeDeep(mergeDeep(current, agent), { ...config, mode: config.mode ?? "all" })
+        continue
+      }
+
+      result[name] = mergeDeep(current, agent)
+    }
+    return result
+  }
+
   export function retireIndexingFlag(info: Record<string, unknown>, source: string) {
     if (!isRecord(info.experimental) || !("semantic_indexing" in info.experimental)) return info
     const experimental = { ...info.experimental }
diff --git a/packages/opencode/test/kilocode/agent-routing.test.ts b/packages/opencode/test/kilocode/agent-routing.test.ts
new file mode 100644
index 00000000000..2ce79e53423
--- /dev/null
+++ b/packages/opencode/test/kilocode/agent-routing.test.ts
@@ -0,0 +1,113 @@
+import { afterEach, expect, test } from "bun:test"
+import { Global } from "@opencode-ai/core/global"
+import path from "path"
+import { Effect } from "effect"
+import { Agent } from "../../src/agent/agent"
+import { Filesystem } from "../../src/util/filesystem"
+import {
+  disposeAllInstances,
+  provideInstance,
+  provideTestInstance,
+  testInstanceStoreLayer,
+  tmpdir,
+} from "../fixture/fixture"
+
+function load(dir: string) {
+  return Effect.runPromise(
+    provideInstance(dir)(Agent.Service.use((svc) => svc.get("architect"))).pipe(
+      Effect.provide(Agent.defaultLayer),
+      Effect.provide(testInstanceStoreLayer),
+    ),
+  )
+}
+
+afterEach(async () => {
+  await disposeAllInstances()
+})
+
+test("config subagent routing survives a colliding primary agent markdown file", async () => {
+  await using tmp = await tmpdir({
+    config: {
+      agent: {
+        architect: {
+          mode: "subagent",
+          model: "test/configured-subagent",
+        },
+      },
+    },
+  })
+  await Filesystem.write(
+    path.join(tmp.path, ".kilo", "agents", "architect.md"),
+    [
+      "---",
+      "mode: primary",
+      "description: Marketplace architect",
+      "---",
+      "",
+      "You are the marketplace architect.",
+    ].join("\n"),
+  )
+
+  const item = await provideTestInstance({
+    directory: tmp.path,
+    fn: () => load(tmp.path),
+  })
+
+  expect(item?.mode).toBe("subagent")
+  expect(String(item?.model?.providerID)).toBe("test")
+  expect(String(item?.model?.modelID)).toBe("configured-subagent")
+  expect(item?.description).toBe("Marketplace architect")
+})
+
+test("config-only custom agent keeps its default all mode across a primary collision", async () => {
+  await using tmp = await tmpdir({
+    config: {
+      agent: {
+        architect: {
+          model: "test/configured-subagent",
+        },
+      },
+    },
+  })
+  await Filesystem.write(
+    path.join(tmp.path, ".kilo", "agents", "architect.md"),
+    ["---", "mode: primary", "---", "", "You are the marketplace architect."].join("\n"),
+  )
+
+  const item = await provideTestInstance({
+    directory: tmp.path,
+    fn: () => load(tmp.path),
+  })
+
+  expect(item?.mode).toBe("all")
+  expect(String(item?.model?.providerID)).toBe("test")
+  expect(String(item?.model?.modelID)).toBe("configured-subagent")
+})
+
+test("higher-priority markdown can override lower-priority markdown routing", async () => {
+  await using tmp = await tmpdir()
+  const project = path.join(tmp.path, "project")
+  const global = path.join(tmp.path, "global")
+  await Filesystem.write(
+    path.join(global, "agents", "architect.md"),
+    ["---", "mode: subagent", "description: Lower-priority architect", "---"].join("\n"),
+  )
+  await Filesystem.write(
+    path.join(project, ".kilo", "agents", "architect.md"),
+    ["---", "mode: primary", "description: Higher-priority architect", "---"].join("\n"),
+  )
+
+  const previous = Global.Path.config
+  ;(Global.Path as { config: string }).config = global
+  try {
+    const item = await provideTestInstance({
+      directory: project,
+      fn: () => load(project),
+    })
+
+    expect(item?.mode).toBe("primary")
+    expect(item?.description).toBe("Higher-priority architect")
+  } finally {
+    ;(Global.Path as { config: string }).config = previous
+  }
+})