fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/core/test/skill/guidance.test.ts

@@ -0,0 +1,154 @@
+import path from "path"
+import { describe, expect } from "bun:test"
+import { Effect, Layer } from "effect"
+import { AgentV2 } from "@opencode-ai/core/agent"
+import { PluginBoot } from "@opencode-ai/core/plugin/boot"
+import { AbsolutePath } from "@opencode-ai/core/schema"
+import { SkillV2 } from "@opencode-ai/core/skill"
+import { SystemContext } from "@opencode-ai/core/system-context"
+import { SkillGuidance } from "@opencode-ai/core/skill/guidance"
+import { it } from "../lib/effect"
+
+const build = AgentV2.ID.make("build")
+const effect = new SkillV2.Info({
+  name: "effect",
+  description: "Build applications with Effect",
+  location: AbsolutePath.make(path.resolve("/skills/effect/SKILL.md")),
+  content: "Effect guidance",
+})
+const hidden = new SkillV2.Info({
+  name: "hidden",
+  location: AbsolutePath.make(path.resolve("/skills/hidden/SKILL.md")),
+  content: "Undescribed guidance",
+})
+const denied = new SkillV2.Info({
+  name: "denied",
+  description: "Must not be advertised",
+  location: AbsolutePath.make(path.resolve("/skills/denied/SKILL.md")),
+  content: "Denied guidance",
+})
+
+const layer = (list: () => SkillV2.Info[], wait: () => void = () => {}) =>
+  SkillGuidance.layer.pipe(
+    Layer.provide(Layer.mock(SkillV2.Service, { list: () => Effect.succeed(list()) })),
+    Layer.provide(Layer.mock(PluginBoot.Service, { wait: () => Effect.sync(wait) })),
+  )
+
+describe("SkillGuidance", () => {
+  it.effect("renders described agent skills and reconciles the complete available list", () => {
+    const agent = new AgentV2.Info({
+      ...AgentV2.Info.empty(build),
+      permissions: [{ action: "skill", resource: "denied", effect: "deny" }],
+    })
+    let skills = [hidden, denied, effect]
+    let waited = 0
+    return Effect.gen(function* () {
+      const guidance = yield* SkillGuidance.Service
+      const initialized = yield* guidance
+        .load({ id: agent.id, info: agent })
+        .pipe(Effect.flatMap(SystemContext.initialize))
+
+      expect(waited).toBe(1)
+      expect(initialized.baseline).toBe(
+        [
+          "Skills provide specialized instructions and workflows for specific tasks.",
+          "Use the skill tool to load a skill when a task matches its description.",
+          "<available_skills>",
+          "  <skill>",
+          "    <name>effect</name>",
+          "    <description>Build applications with Effect</description>",
+          "  </skill>",
+          "</available_skills>",
+        ].join("\n"),
+      )
+
+      skills = []
+      expect(
+        yield* guidance
+          .load({ id: agent.id, info: agent })
+          .pipe(Effect.flatMap((context) => SystemContext.reconcile(context, initialized.snapshot))),
+      ).toMatchObject({
+        _tag: "Updated",
+        text: expect.stringContaining("No skills are currently available."),
+      })
+    }).pipe(
+      Effect.provide(
+        layer(
+          () => skills,
+          () => waited++,
+        ),
+      ),
+    )
+  })
+
+  it.effect("omits guidance when the selected agent denies all skills", () => {
+    const agent = new AgentV2.Info({
+      ...AgentV2.Info.empty(build),
+      permissions: [{ action: "skill", resource: "*", effect: "deny" }],
+    })
+    return Effect.gen(function* () {
+      const guidance = yield* SkillGuidance.Service
+      expect(
+        yield* guidance.load({ id: agent.id, info: agent }).pipe(Effect.flatMap(SystemContext.initialize)),
+      ).toEqual({
+        baseline: "",
+        snapshot: {},
+      })
+    }).pipe(Effect.provide(layer(() => [effect])))
+  })
+
+  it.effect("omits guidance when a resource-specific denial follows the global denial", () => {
+    const agent = new AgentV2.Info({
+      ...AgentV2.Info.empty(build),
+      permissions: [
+        { action: "skill", resource: "*", effect: "deny" },
+        { action: "skill", resource: "hidden", effect: "deny" },
+      ],
+    })
+    return Effect.gen(function* () {
+      const guidance = yield* SkillGuidance.Service
+      expect(
+        yield* guidance.load({ id: agent.id, info: agent }).pipe(Effect.flatMap(SystemContext.initialize)),
+      ).toEqual({
+        baseline: "",
+        snapshot: {},
+      })
+    }).pipe(Effect.provide(layer(() => [effect])))
+  })
+
+  it.effect("retains specifically allowed skills after a global denial", () => {
+    const agent = new AgentV2.Info({
+      ...AgentV2.Info.empty(build),
+      permissions: [
+        { action: "skill", resource: "*", effect: "deny" },
+        { action: "skill", resource: "effect", effect: "allow" },
+      ],
+    })
+    return Effect.gen(function* () {
+      const guidance = yield* SkillGuidance.Service
+      expect(
+        (yield* guidance.load({ id: agent.id, info: agent }).pipe(Effect.flatMap(SystemContext.initialize))).baseline,
+      ).toContain("<name>effect</name>")
+    }).pipe(Effect.provide(layer(() => [effect])))
+  })
+
+  it.effect("omits guidance when a specifically allowed skill is denied again", () => {
+    const agent = new AgentV2.Info({
+      ...AgentV2.Info.empty(build),
+      permissions: [
+        { action: "skill", resource: "*", effect: "deny" },
+        { action: "skill", resource: "effect", effect: "allow" },
+        { action: "skill", resource: "effect", effect: "deny" },
+      ],
+    })
+    return Effect.gen(function* () {
+      const guidance = yield* SkillGuidance.Service
+      expect(
+        yield* guidance.load({ id: agent.id, info: agent }).pipe(Effect.flatMap(SystemContext.initialize)),
+      ).toEqual({
+        baseline: "",
+        snapshot: {},
+      })
+    }).pipe(Effect.provide(layer(() => [effect])))
+  })
+})