From ad69f829aebb5feae6b85035e0c9752ffb641d83 Mon Sep 17 00:00:00 2001
From: Mikkel Georgsen <msgeorgsen@gmail.com>
Date: Wed, 1 Apr 2026 10:57:31 +0200
Subject: [PATCH] [nexus] feat(18-01): implement adapter skill config resolver

- Static ADAPTER_SKILL_CONFIGS array with all 10 adapter types
- CONFIG_BY_TYPE Map for O(1) lookup by adapter type string
- FALLBACK_CONFIG for unknown types (supportsInstall: false, never throws)
- resolveAdapterSkillConfig returns correct config for all known adapters
- listAdapterSkillConfigs returns full readonly config array
- All 15 unit tests pass, no regressions in full test suite
---
 .../adapter-utils/src/adapter-skill-config.ts | 111 +++++++++++++++++-
 1 file changed, 107 insertions(+), 4 deletions(-)

diff --git a/packages/adapter-utils/src/adapter-skill-config.ts b/packages/adapter-utils/src/adapter-skill-config.ts
index 051f835e..b83f7b67 100644
--- a/packages/adapter-utils/src/adapter-skill-config.ts
+++ b/packages/adapter-utils/src/adapter-skill-config.ts
@@ -1,17 +1,120 @@
 import type { AdapterSkillConfig } from "./types.js";
 
+/**
+ * Static configuration for all known adapter types.
+ * This is the single source of truth for skill directory paths, formats, and
+ * install capability across the Nexus adapter ecosystem.
+ */
+const ADAPTER_SKILL_CONFIGS: readonly AdapterSkillConfig[] = [
+  {
+    adapterType: "claude_local",
+    skillDir: "~/.claude/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "hermes_local",
+    skillDir: "~/.hermes/skills/",
+    nativeSkillDir: "~/.hermes/skills/",
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "openclaw_gateway",
+    skillDir: "~/.openclaw/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "codex_local",
+    skillDir: "~/.agents/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "cursor",
+    skillDir: "~/.cursor/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "opencode_local",
+    skillDir: "~/.config/opencode/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "pi_local",
+    skillDir: "~/.pi/agent/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "gemini_local",
+    skillDir: "~/.gemini/skills/",
+    nativeSkillDir: null,
+    format: "skill-md",
+    supportsInstall: true,
+    unsupportedReason: null,
+  },
+  {
+    adapterType: "process",
+    skillDir: null,
+    nativeSkillDir: null,
+    format: "none",
+    supportsInstall: false,
+    unsupportedReason: "Skills not supported for this adapter type",
+  },
+  {
+    adapterType: "http",
+    skillDir: null,
+    nativeSkillDir: null,
+    format: "none",
+    supportsInstall: false,
+    unsupportedReason: "Skills not supported for this adapter type",
+  },
+];
+
+/** Lookup index built from the static config array for O(1) resolution. */
+const CONFIG_BY_TYPE = new Map<string, AdapterSkillConfig>(
+  ADAPTER_SKILL_CONFIGS.map((cfg) => [cfg.adapterType, cfg]),
+);
+
+/** Fallback returned for unknown adapter types — never throws. */
+const FALLBACK_CONFIG: AdapterSkillConfig = {
+  adapterType: "unknown",
+  skillDir: null,
+  nativeSkillDir: null,
+  format: "none",
+  supportsInstall: false,
+  unsupportedReason: "Unknown adapter type — skills not supported",
+};
+
 /**
  * Returns the AdapterSkillConfig for the given adapter type.
- * Unknown types return a safe fallback config with supportsInstall: false.
+ * Unknown types receive a safe fallback config with supportsInstall: false.
  * Never throws.
  */
-export function resolveAdapterSkillConfig(_adapterType: string): AdapterSkillConfig {
-  throw new Error("not implemented");
+export function resolveAdapterSkillConfig(adapterType: string): AdapterSkillConfig {
+  return CONFIG_BY_TYPE.get(adapterType) ?? { ...FALLBACK_CONFIG, adapterType };
 }
 
 /**
  * Returns all registered adapter skill configs (one per known adapter type).
  */
 export function listAdapterSkillConfigs(): readonly AdapterSkillConfig[] {
-  throw new Error("not implemented");
+  return ADAPTER_SKILL_CONFIGS;
 }