feat: add developer skill — coding conventions + architecture guide

Adds 'uwf skill developer' for contributors to the workflow engine.
Covers: monorepo structure, dependency layers, functional-first conventions,
error handling, logging with tagged logger, development workflow,
testing, publishing, key modules (moderator, extract pipeline, createAgent).

Refs #541

packages/cli-workflow/src/__tests__/skill.test.ts

@@ -10,6 +10,7 @@ import {
   cmdSkillArchitecture,
   cmdSkillAuthor,
   cmdSkillCli,
+  cmdSkillDeveloper,
   cmdSkillList,
   cmdSkillModerator,
   cmdSkillUser,
@@ -27,6 +28,7 @@ describe("skill commands", () => {
     expect(result).toContain("actor");
     expect(result).toContain("user");
     expect(result).toContain("author");
+    expect(result).toContain("developer");
     for (const name of result) {
       expect(name).toMatch(/^\S+$/);
     }
@@ -97,6 +99,15 @@ describe("skill commands", () => {
     expect(result.length).toBeGreaterThan(500);
   });
 
+  test("skill developer returns non-empty markdown string", () => {
+    const result = cmdSkillDeveloper();
+    expect(typeof result).toBe("string");
+    expect(result).toContain("Monorepo");
+    expect(result).toContain("CAS");
+    expect(result).toContain("Biome");
+    expect(result.length).toBeGreaterThan(500);
+  });
+
   test("skill help subcommand is suppressed", () => {
     const output = execFileSync("bun", ["src/cli.ts", "skill", "--help"], {
       cwd: join(__dirname, "..", ".."),
@@ -111,6 +122,7 @@ describe("skill commands", () => {
     expect(output).toContain("actor");
     expect(output).toContain("user");
     expect(output).toContain("author");
+    expect(output).toContain("developer");
     expect(output).toContain("list");
   });
 });

packages/cli-workflow/src/cli.ts

@@ -21,6 +21,7 @@ import {
   cmdSkillArchitecture,
   cmdSkillAuthor,
   cmdSkillCli,
+  cmdSkillDeveloper,
   cmdSkillList,
   cmdSkillModerator,
   cmdSkillUser,
@@ -520,6 +521,13 @@ skill
     console.log(cmdSkillAuthor());
   });
 
+skill
+  .command("developer")
+  .description("Print the developer reference (coding conventions + architecture)")
+  .action(() => {
+    console.log(cmdSkillDeveloper());
+  });
+
 skill
   .command("moderator")
   .description("Print the moderator reference")

packages/cli-workflow/src/commands/skill.ts

@@ -3,6 +3,7 @@ export {
   generateArchitectureReference as cmdSkillArchitecture,
   generateAuthorReference as cmdSkillAuthor,
   generateCliReference as cmdSkillCli,
+  generateDeveloperReference as cmdSkillDeveloper,
   generateModeratorReference as cmdSkillModerator,
   generateUserReference as cmdSkillUser,
   generateYamlReference as cmdSkillYaml,
@@ -16,6 +17,7 @@ const SKILL_NAMES = [
   "actor",
   "user",
   "author",
+  "developer",
 ] as const;
 
 export function cmdSkillList(): ReadonlyArray<string> {