diff --git a/skills/atlassian/shared/scripts/src/adf.ts b/skills/atlassian/shared/scripts/src/adf.ts
new file mode 100644
index 0000000..638914c
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/adf.ts
@@ -0,0 +1,92 @@
+const TEXT_NODE = "text";
+
+function textNode(text: string) {
+  return {
+    type: TEXT_NODE,
+    text,
+  };
+}
+
+function paragraphNode(lines: string[]) {
+  const content: Array<{ type: string; text?: string }> = [];
+
+  lines.forEach((line, index) => {
+    if (index > 0) {
+      content.push({ type: "hardBreak" });
+    }
+
+    if (line.length > 0) {
+      content.push(textNode(line));
+    }
+  });
+
+  return {
+    type: "paragraph",
+    ...(content.length > 0 ? { content } : {}),
+  };
+}
+
+export function markdownToAdf(input: string) {
+  const lines = input.replace(/\r\n/g, "\n").split("\n");
+  const content: Array<Record<string, unknown>> = [];
+  let index = 0;
+
+  while (index < lines.length) {
+    const current = lines[index]?.trimEnd() ?? "";
+
+    if (current.trim().length === 0) {
+      index += 1;
+      continue;
+    }
+
+    const heading = current.match(/^(#{1,6})\s+(.*)$/);
+
+    if (heading) {
+      content.push({
+        type: "heading",
+        attrs: { level: heading[1].length },
+        content: [textNode(heading[2])],
+      });
+      index += 1;
+      continue;
+    }
+
+    if (/^[-*]\s+/.test(current)) {
+      const items: Array<Record<string, unknown>> = [];
+
+      while (index < lines.length && /^[-*]\s+/.test(lines[index] ?? "")) {
+        items.push({
+          type: "listItem",
+          content: [
+            {
+              type: "paragraph",
+              content: [textNode((lines[index] ?? "").replace(/^[-*]\s+/, ""))],
+            },
+          ],
+        });
+        index += 1;
+      }
+
+      content.push({
+        type: "bulletList",
+        content: items,
+      });
+      continue;
+    }
+
+    const paragraphLines: string[] = [];
+
+    while (index < lines.length && (lines[index]?.trim().length ?? 0) > 0) {
+      paragraphLines.push(lines[index] ?? "");
+      index += 1;
+    }
+
+    content.push(paragraphNode(paragraphLines));
+  }
+
+  return {
+    type: "doc",
+    version: 1,
+    content,
+  };
+}
diff --git a/skills/atlassian/shared/scripts/src/cli.ts b/skills/atlassian/shared/scripts/src/cli.ts
index 1d695a9..9784800 100644
--- a/skills/atlassian/shared/scripts/src/cli.ts
+++ b/skills/atlassian/shared/scripts/src/cli.ts
@@ -1,22 +1,212 @@
+import process from "node:process";
+import { pathToFileURL } from "node:url";
+
 import { Command } from "commander";
 
-const program = new Command()
-  .name("atlassian")
-  .description("Portable Atlassian CLI for multi-agent skills")
-  .version("0.1.0");
+import { loadConfig } from "./config.js";
+import { readWorkspaceFile } from "./files.js";
+import { createJiraClient } from "./jira.js";
+import { writeOutput } from "./output.js";
+import type { FetchLike, OutputFormat, Writer } from "./types.js";
 
-program
-  .command("health")
-  .description("Validate configuration and Atlassian connectivity")
-  .option("--format <format>", "Output format", "json")
-  .action((options) => {
-    const payload = {
-      ok: false,
-      message: "health is not implemented yet",
-      format: options.format,
-    };
+type CliContext = {
+  cwd?: string;
+  env?: NodeJS.ProcessEnv;
+  fetchImpl?: FetchLike;
+  stdout?: Writer;
+  stderr?: Writer;
+};
 
-    console.log(JSON.stringify(payload, null, 2));
+function resolveFormat(format: string | undefined): OutputFormat {
+  return format === "text" ? "text" : "json";
+}
+
+function createRuntime(context: CliContext) {
+  const cwd = context.cwd ?? process.cwd();
+  const env = context.env ?? process.env;
+  const stdout = context.stdout ?? process.stdout;
+  const stderr = context.stderr ?? process.stderr;
+  let configCache: ReturnType<typeof loadConfig> | undefined;
+  let jiraCache: ReturnType<typeof createJiraClient> | undefined;
+
+  function getConfig() {
+    configCache ??= loadConfig(env, { cwd });
+    return configCache;
+  }
+
+  function getJiraClient() {
+    jiraCache ??= createJiraClient({
+      config: getConfig(),
+      fetchImpl: context.fetchImpl,
+    });
+    return jiraCache;
+  }
+
+  async function readBodyFile(filePath: string | undefined) {
+    if (!filePath) {
+      return undefined;
+    }
+
+    return readWorkspaceFile(filePath, cwd);
+  }
+
+  return {
+    cwd,
+    stdout,
+    stderr,
+    readBodyFile,
+    getConfig,
+    getJiraClient,
+  };
+}
+
+export function buildProgram(context: CliContext = {}) {
+  const runtime = createRuntime(context);
+  const program = new Command()
+    .name("atlassian")
+    .description("Portable Atlassian CLI for multi-agent skills")
+    .version("0.1.0");
+
+  program
+    .command("health")
+    .description("Validate configuration and Atlassian connectivity")
+    .option("--format <format>", "Output format", "json")
+    .action((options) => {
+      writeOutput(
+        runtime.stdout,
+        {
+          ok: true,
+          data: {
+            baseUrl: runtime.getConfig().baseUrl,
+            jiraBaseUrl: runtime.getConfig().jiraBaseUrl,
+            confluenceBaseUrl: runtime.getConfig().confluenceBaseUrl,
+            defaultProject: runtime.getConfig().defaultProject,
+            defaultSpace: runtime.getConfig().defaultSpace,
+          },
+        },
+        resolveFormat(options.format),
+      );
+    });
+
+  program
+    .command("jira-search")
+    .requiredOption("--jql <jql>", "JQL expression to execute")
+    .option("--max-results <number>", "Maximum results to return", "50")
+    .option("--start-at <number>", "Result offset", "0")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().searchIssues({
+        jql: options.jql,
+        maxResults: Number(options.maxResults),
+        startAt: Number(options.startAt),
+      });
+
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-get")
+    .requiredOption("--issue <issue>", "Issue key")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().getIssue(options.issue);
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-create")
+    .requiredOption("--type <type>", "Issue type name")
+    .requiredOption("--summary <summary>", "Issue summary")
+    .option("--project <project>", "Project key")
+    .option("--description-file <path>", "Workspace-relative markdown/text file")
+    .option("--dry-run", "Print the request without sending it")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().createIssue({
+        project: options.project,
+        type: options.type,
+        summary: options.summary,
+        description: await runtime.readBodyFile(options.descriptionFile),
+        dryRun: Boolean(options.dryRun),
+      });
+
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-update")
+    .requiredOption("--issue <issue>", "Issue key")
+    .option("--summary <summary>", "Updated summary")
+    .option("--description-file <path>", "Workspace-relative markdown/text file")
+    .option("--dry-run", "Print the request without sending it")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().updateIssue({
+        issue: options.issue,
+        summary: options.summary,
+        description: await runtime.readBodyFile(options.descriptionFile),
+        dryRun: Boolean(options.dryRun),
+      });
+
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-comment")
+    .requiredOption("--issue <issue>", "Issue key")
+    .requiredOption("--body-file <path>", "Workspace-relative markdown/text file")
+    .option("--dry-run", "Print the request without sending it")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().commentIssue({
+        issue: options.issue,
+        body: (await runtime.readBodyFile(options.bodyFile)) as string,
+        dryRun: Boolean(options.dryRun),
+      });
+
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-transitions")
+    .requiredOption("--issue <issue>", "Issue key")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().getTransitions(options.issue);
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  program
+    .command("jira-transition")
+    .requiredOption("--issue <issue>", "Issue key")
+    .requiredOption("--transition <transition>", "Transition ID")
+    .option("--dry-run", "Print the request without sending it")
+    .option("--format <format>", "Output format", "json")
+    .action(async (options) => {
+      const payload = await runtime.getJiraClient().transitionIssue({
+        issue: options.issue,
+        transition: options.transition,
+        dryRun: Boolean(options.dryRun),
+      });
+
+      writeOutput(runtime.stdout, payload, resolveFormat(options.format));
+    });
+
+  return program;
+}
+
+export async function runCli(argv = process.argv, context: CliContext = {}) {
+  const program = buildProgram(context);
+  await program.parseAsync(argv);
+}
+
+const isDirectExecution =
+  Boolean(process.argv[1]) && import.meta.url === pathToFileURL(process.argv[1]).href;
+
+if (isDirectExecution) {
+  runCli().catch((error: unknown) => {
+    const message = error instanceof Error ? error.message : String(error);
+    process.stderr.write(`${message}\n`);
+    process.exitCode = 1;
   });
-
-program.parse(process.argv);
+}
diff --git a/skills/atlassian/shared/scripts/src/config.ts b/skills/atlassian/shared/scripts/src/config.ts
new file mode 100644
index 0000000..eb34a39
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/config.ts
@@ -0,0 +1,52 @@
+import path from "node:path";
+
+import { config as loadDotEnv } from "dotenv";
+
+import type { AtlassianConfig } from "./types.js";
+
+function normalizeBaseUrl(value: string) {
+  return value.replace(/\/+$/, "");
+}
+
+function readRequired(env: NodeJS.ProcessEnv, key: string) {
+  const value = env[key]?.trim();
+
+  if (!value) {
+    throw new Error(`Missing required environment variable: ${key}`);
+  }
+
+  return value;
+}
+
+export function loadConfig(
+  env: NodeJS.ProcessEnv = process.env,
+  options?: {
+    cwd?: string;
+  },
+): AtlassianConfig {
+  loadDotEnv({
+    path: path.resolve(options?.cwd ?? process.cwd(), ".env"),
+    processEnv: env as Record<string, string>,
+    override: false,
+  });
+
+  const baseUrl = normalizeBaseUrl(readRequired(env, "ATLASSIAN_BASE_URL"));
+
+  return {
+    baseUrl,
+    jiraBaseUrl: normalizeBaseUrl(env.ATLASSIAN_JIRA_BASE_URL?.trim() || baseUrl),
+    confluenceBaseUrl: normalizeBaseUrl(env.ATLASSIAN_CONFLUENCE_BASE_URL?.trim() || baseUrl),
+    email: readRequired(env, "ATLASSIAN_EMAIL"),
+    apiToken: readRequired(env, "ATLASSIAN_API_TOKEN"),
+    defaultProject: env.ATLASSIAN_DEFAULT_PROJECT?.trim() || undefined,
+    defaultSpace: env.ATLASSIAN_DEFAULT_SPACE?.trim() || undefined,
+  };
+}
+
+export function createBasicAuthHeader(config: {
+  email: string;
+  apiToken: string;
+  [key: string]: unknown;
+}) {
+  return `Basic ${Buffer.from(`${config.email}:${config.apiToken}`).toString("base64")}`;
+}
diff --git a/skills/atlassian/shared/scripts/src/files.ts b/skills/atlassian/shared/scripts/src/files.ts
new file mode 100644
index 0000000..8339109
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/files.ts
@@ -0,0 +1,13 @@
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+
+export async function readWorkspaceFile(filePath: string, cwd: string) {
+  const resolved = path.resolve(cwd, filePath);
+  const relative = path.relative(cwd, resolved);
+
+  if (relative.startsWith("..") || path.isAbsolute(relative)) {
+    throw new Error(`--body-file must stay within the active workspace: ${filePath}`);
+  }
+
+  return readFile(resolved, "utf8");
+}
diff --git a/skills/atlassian/shared/scripts/src/jira.ts b/skills/atlassian/shared/scripts/src/jira.ts
new file mode 100644
index 0000000..aaec3f5
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/jira.ts
@@ -0,0 +1,294 @@
+import { markdownToAdf } from "./adf.js";
+import { createBasicAuthHeader } from "./config.js";
+import type { AtlassianConfig, CommandOutput, FetchLike, JiraIssueSummary } from "./types.js";
+
+const ISSUE_FIELDS = ["summary", "issuetype", "status", "assignee", "created", "updated"] as const;
+
+type JiraClientOptions = {
+  config: AtlassianConfig;
+  fetchImpl?: FetchLike;
+};
+
+type SearchInput = {
+  jql: string;
+  maxResults: number;
+  startAt: number;
+};
+
+type CreateInput = {
+  project?: string;
+  type: string;
+  summary: string;
+  description?: string;
+  dryRun?: boolean;
+};
+
+type UpdateInput = {
+  issue: string;
+  summary?: string;
+  description?: string;
+  dryRun?: boolean;
+};
+
+type CommentInput = {
+  issue: string;
+  body: string;
+  dryRun?: boolean;
+};
+
+type TransitionInput = {
+  issue: string;
+  transition: string;
+  dryRun?: boolean;
+};
+
+function normalizeIssue(config: AtlassianConfig, issue: Record<string, unknown>): JiraIssueSummary {
+  const fields = (issue.fields ?? {}) as Record<string, unknown>;
+  const issueType = (fields.issuetype ?? {}) as Record<string, unknown>;
+  const status = (fields.status ?? {}) as Record<string, unknown>;
+  const assignee = (fields.assignee ?? {}) as Record<string, unknown>;
+
+  return {
+    key: String(issue.key ?? ""),
+    summary: String(fields.summary ?? ""),
+    issueType: String(issueType.name ?? ""),
+    status: String(status.name ?? ""),
+    assignee: assignee.displayName ? String(assignee.displayName) : undefined,
+    created: String(fields.created ?? ""),
+    updated: String(fields.updated ?? ""),
+    url: `${config.baseUrl}/browse/${issue.key ?? ""}`,
+  };
+}
+
+function createHeaders(config: AtlassianConfig, includeJsonBody: boolean) {
+  const headers: Array<[string, string]> = [
+    ["Accept", "application/json"],
+    ["Authorization", createBasicAuthHeader(config)],
+  ];
+
+  if (includeJsonBody) {
+    headers.push(["Content-Type", "application/json"]);
+  }
+
+  return headers;
+}
+
+async function parseResponse(response: Response) {
+  if (response.status === 204) {
+    return null;
+  }
+
+  const contentType = response.headers.get("content-type") ?? "";
+
+  if (contentType.includes("application/json")) {
+    return response.json();
+  }
+
+  return response.text();
+}
+
+function createRequest(config: AtlassianConfig, method: "GET" | "POST" | "PUT", path: string, body?: unknown) {
+  const url = new URL(path, `${config.jiraBaseUrl}/`);
+
+  return {
+    method,
+    url: url.toString(),
+    ...(body === undefined ? {} : { body }),
+  };
+}
+
+export function createJiraClient(options: JiraClientOptions) {
+  const fetchImpl = options.fetchImpl ?? globalThis.fetch;
+
+  if (!fetchImpl) {
+    throw new Error("Fetch API is not available in this runtime");
+  }
+
+  async function send(method: "GET" | "POST" | "PUT", path: string, body?: unknown) {
+    const request = createRequest(options.config, method, path, body);
+    const response = await fetchImpl(request.url, {
+      method,
+      headers: createHeaders(options.config, body !== undefined),
+      ...(body === undefined ? {} : { body: JSON.stringify(body) }),
+    });
+
+    if (!response.ok) {
+      throw new Error(`Jira request failed: ${response.status} ${response.statusText}`);
+    }
+
+    return parseResponse(response);
+  }
+
+  return {
+    async searchIssues(input: SearchInput): Promise<CommandOutput<unknown>> {
+      const raw = (await send("POST", "/rest/api/3/search", {
+        jql: input.jql,
+        maxResults: input.maxResults,
+        startAt: input.startAt,
+        fields: [...ISSUE_FIELDS],
+      })) as Record<string, unknown>;
+
+      const issues = Array.isArray(raw.issues) ? raw.issues : [];
+
+      return {
+        ok: true,
+        data: {
+          issues: issues.map((issue) => normalizeIssue(options.config, issue as Record<string, unknown>)),
+          startAt: Number(raw.startAt ?? input.startAt),
+          maxResults: Number(raw.maxResults ?? input.maxResults),
+          total: Number(raw.total ?? issues.length),
+        },
+      };
+    },
+
+    async getIssue(issue: string): Promise<CommandOutput<unknown>> {
+      const url = new URL(`/rest/api/3/issue/${issue}`, `${options.config.jiraBaseUrl}/`);
+      url.searchParams.set("fields", ISSUE_FIELDS.join(","));
+
+      const raw = (await send("GET", `${url.pathname}${url.search}`)) as Record<string, unknown>;
+
+      return {
+        ok: true,
+        data: {
+          issue: normalizeIssue(options.config, raw),
+        },
+        raw,
+      };
+    },
+
+    async getTransitions(issue: string): Promise<CommandOutput<unknown>> {
+      const raw = (await send(
+        "GET",
+        `/rest/api/3/issue/${issue}/transitions`,
+      )) as { transitions?: Array<Record<string, unknown>> };
+
+      return {
+        ok: true,
+        data: {
+          transitions: (raw.transitions ?? []).map((transition) => ({
+            id: String(transition.id ?? ""),
+            name: String(transition.name ?? ""),
+            toStatus: String(((transition.to ?? {}) as Record<string, unknown>).name ?? ""),
+            hasScreen: Boolean(transition.hasScreen),
+          })),
+        },
+      };
+    },
+
+    async createIssue(input: CreateInput): Promise<CommandOutput<unknown>> {
+      const project = input.project || options.config.defaultProject;
+
+      if (!project) {
+        throw new Error("jira-create requires --project or ATLASSIAN_DEFAULT_PROJECT");
+      }
+
+      const request = createRequest(options.config, "POST", "/rest/api/3/issue", {
+        fields: {
+          project: { key: project },
+          issuetype: { name: input.type },
+          summary: input.summary,
+          ...(input.description ? { description: markdownToAdf(input.description) } : {}),
+        },
+      });
+
+      if (input.dryRun) {
+        return {
+          ok: true,
+          dryRun: true,
+          data: request,
+        };
+      }
+
+      const raw = await send("POST", "/rest/api/3/issue", request.body);
+      return { ok: true, data: raw };
+    },
+
+    async updateIssue(input: UpdateInput): Promise<CommandOutput<unknown>> {
+      const fields: Record<string, unknown> = {};
+
+      if (input.summary) {
+        fields.summary = input.summary;
+      }
+
+      if (input.description) {
+        fields.description = markdownToAdf(input.description);
+      }
+
+      if (Object.keys(fields).length === 0) {
+        throw new Error("jira-update requires --summary and/or --description-file");
+      }
+
+      const request = createRequest(options.config, "PUT", `/rest/api/3/issue/${input.issue}`, {
+        fields,
+      });
+
+      if (input.dryRun) {
+        return {
+          ok: true,
+          dryRun: true,
+          data: request,
+        };
+      }
+
+      await send("PUT", `/rest/api/3/issue/${input.issue}`, request.body);
+      return {
+        ok: true,
+        data: {
+          issue: input.issue,
+          updated: true,
+        },
+      };
+    },
+
+    async commentIssue(input: CommentInput): Promise<CommandOutput<unknown>> {
+      const request = createRequest(options.config, "POST", `/rest/api/3/issue/${input.issue}/comment`, {
+        body: markdownToAdf(input.body),
+      });
+
+      if (input.dryRun) {
+        return {
+          ok: true,
+          dryRun: true,
+          data: request,
+        };
+      }
+
+      const raw = await send("POST", `/rest/api/3/issue/${input.issue}/comment`, request.body);
+      return {
+        ok: true,
+        data: raw,
+      };
+    },
+
+    async transitionIssue(input: TransitionInput): Promise<CommandOutput<unknown>> {
+      const request = createRequest(
+        options.config,
+        "POST",
+        `/rest/api/3/issue/${input.issue}/transitions`,
+        {
+          transition: {
+            id: input.transition,
+          },
+        },
+      );
+
+      if (input.dryRun) {
+        return {
+          ok: true,
+          dryRun: true,
+          data: request,
+        };
+      }
+
+      await send("POST", `/rest/api/3/issue/${input.issue}/transitions`, request.body);
+      return {
+        ok: true,
+        data: {
+          issue: input.issue,
+          transitioned: true,
+          transition: input.transition,
+        },
+      };
+    },
+  };
+}
diff --git a/skills/atlassian/shared/scripts/src/output.ts b/skills/atlassian/shared/scripts/src/output.ts
new file mode 100644
index 0000000..06b8a6e
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/output.ts
@@ -0,0 +1,44 @@
+import type { CommandOutput, OutputFormat, Writer } from "./types.js";
+
+function renderText(payload: CommandOutput<unknown>) {
+  const data = payload.data as Record<string, unknown>;
+
+  if (Array.isArray(data?.issues)) {
+    return data.issues
+      .map((issue) => {
+        const item = issue as Record<string, string>;
+        return `${item.key} [${item.status}] ${item.issueType} - ${item.summary}`;
+      })
+      .join("\n");
+  }
+
+  if (data?.issue && typeof data.issue === "object") {
+    const issue = data.issue as Record<string, string>;
+    return [
+      issue.key,
+      `${issue.issueType} | ${issue.status}`,
+      issue.summary,
+      issue.url,
+    ].join("\n");
+  }
+
+  if (Array.isArray(data?.transitions)) {
+    return data.transitions
+      .map((transition) => {
+        const item = transition as Record<string, string>;
+        return `${item.id} ${item.name} -> ${item.toStatus}`;
+      })
+      .join("\n");
+  }
+
+  return JSON.stringify(payload, null, 2);
+}
+
+export function writeOutput(
+  writer: Writer,
+  payload: CommandOutput<unknown>,
+  format: OutputFormat = "json",
+) {
+  const body = format === "text" ? renderText(payload) : JSON.stringify(payload, null, 2);
+  writer.write(`${body}\n`);
+}
diff --git a/skills/atlassian/shared/scripts/src/types.ts b/skills/atlassian/shared/scripts/src/types.ts
new file mode 100644
index 0000000..3072ee1
--- /dev/null
+++ b/skills/atlassian/shared/scripts/src/types.ts
@@ -0,0 +1,35 @@
+export type AtlassianConfig = {
+  baseUrl: string;
+  jiraBaseUrl: string;
+  confluenceBaseUrl: string;
+  email: string;
+  apiToken: string;
+  defaultProject?: string;
+  defaultSpace?: string;
+};
+
+export type CommandOutput<T> = {
+  ok: true;
+  data: T;
+  dryRun?: boolean;
+  raw?: unknown;
+};
+
+export type JiraIssueSummary = {
+  key: string;
+  summary: string;
+  issueType: string;
+  status: string;
+  assignee?: string;
+  created: string;
+  updated: string;
+  url: string;
+};
+
+export type Writer = {
+  write(chunk: string | Uint8Array): unknown;
+};
+
+export type FetchLike = typeof fetch;
+
+export type OutputFormat = "json" | "text";
diff --git a/skills/atlassian/shared/scripts/tests/config.test.ts b/skills/atlassian/shared/scripts/tests/config.test.ts
new file mode 100644
index 0000000..b45741c
--- /dev/null
+++ b/skills/atlassian/shared/scripts/tests/config.test.ts
@@ -0,0 +1,38 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { createBasicAuthHeader, loadConfig } from "../src/config.js";
+
+test("loadConfig derives Jira and Confluence base URLs from ATLASSIAN_BASE_URL", () => {
+  const config = loadConfig({
+    ATLASSIAN_BASE_URL: "https://example.atlassian.net/",
+    ATLASSIAN_EMAIL: "dev@example.com",
+    ATLASSIAN_API_TOKEN: "secret-token",
+    ATLASSIAN_DEFAULT_PROJECT: "ENG",
+  });
+
+  assert.deepEqual(config, {
+    baseUrl: "https://example.atlassian.net",
+    jiraBaseUrl: "https://example.atlassian.net",
+    confluenceBaseUrl: "https://example.atlassian.net",
+    email: "dev@example.com",
+    apiToken: "secret-token",
+    defaultProject: "ENG",
+    defaultSpace: undefined,
+  });
+});
+
+test("createBasicAuthHeader encodes email and API token for Atlassian Cloud", () => {
+  const header = createBasicAuthHeader({
+    baseUrl: "https://example.atlassian.net",
+    jiraBaseUrl: "https://example.atlassian.net",
+    confluenceBaseUrl: "https://example.atlassian.net",
+    email: "dev@example.com",
+    apiToken: "secret-token",
+  });
+
+  assert.equal(
+    header,
+    `Basic ${Buffer.from("dev@example.com:secret-token").toString("base64")}`,
+  );
+});
diff --git a/skills/atlassian/shared/scripts/tests/helpers.ts b/skills/atlassian/shared/scripts/tests/helpers.ts
new file mode 100644
index 0000000..dc04d1b
--- /dev/null
+++ b/skills/atlassian/shared/scripts/tests/helpers.ts
@@ -0,0 +1,71 @@
+import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+
+import { buildProgram } from "../src/cli.js";
+
+type RunCliOptions = {
+  args: string[];
+  cwd?: string;
+  env?: NodeJS.ProcessEnv;
+  fetchImpl?: typeof fetch;
+};
+
+class MemoryWriter {
+  private readonly chunks: string[] = [];
+
+  write(chunk: string | Uint8Array) {
+    this.chunks.push(typeof chunk === "string" ? chunk : Buffer.from(chunk).toString("utf8"));
+    return true;
+  }
+
+  toString() {
+    return this.chunks.join("");
+  }
+}
+
+export async function runCli(options: RunCliOptions) {
+  const stdout = new MemoryWriter();
+  const stderr = new MemoryWriter();
+  const program = buildProgram({
+    cwd: options.cwd,
+    env: options.env,
+    fetchImpl: options.fetchImpl,
+    stdout,
+    stderr,
+  });
+
+  await program.parseAsync(options.args, { from: "user" });
+
+  return {
+    stdout: stdout.toString(),
+    stderr: stderr.toString(),
+  };
+}
+
+export function createTempWorkspace() {
+  const cwd = mkdtempSync(path.join(tmpdir(), "atlassian-skill-"));
+
+  return {
+    cwd,
+    cleanup() {
+      rmSync(cwd, { recursive: true, force: true });
+    },
+    write(relativePath: string, contents: string) {
+      const target = path.join(cwd, relativePath);
+      writeFileSync(target, contents, "utf8");
+      return target;
+    },
+  };
+}
+
+export function jsonResponse(payload: unknown, init?: ResponseInit) {
+  return new Response(JSON.stringify(payload), {
+    status: init?.status ?? 200,
+    statusText: init?.statusText,
+    headers: {
+      "content-type": "application/json",
+      ...(init?.headers ?? {}),
+    },
+  });
+}
diff --git a/skills/atlassian/shared/scripts/tests/jira.test.ts b/skills/atlassian/shared/scripts/tests/jira.test.ts
new file mode 100644
index 0000000..e14d643
--- /dev/null
+++ b/skills/atlassian/shared/scripts/tests/jira.test.ts
@@ -0,0 +1,321 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { markdownToAdf } from "../src/adf.js";
+import { createTempWorkspace, jsonResponse, runCli } from "./helpers.js";
+
+const baseEnv = {
+  ATLASSIAN_BASE_URL: "https://example.atlassian.net",
+  ATLASSIAN_EMAIL: "dev@example.com",
+  ATLASSIAN_API_TOKEN: "secret-token",
+};
+
+test("jira-search emits normalized results and uses pagination inputs", async () => {
+  const calls: Array<{ url: string; init: RequestInit | undefined }> = [];
+
+  const fetchImpl: typeof fetch = async (input, init) => {
+    const url = typeof input === "string" ? input : input.toString();
+    calls.push({ url, init });
+
+    return jsonResponse({
+      startAt: 10,
+      maxResults: 2,
+      total: 25,
+      issues: [
+        {
+          key: "ENG-1",
+          fields: {
+            summary: "Add Jira search command",
+            issuetype: { name: "Story" },
+            status: { name: "In Progress" },
+            assignee: { displayName: "Ada Lovelace" },
+            created: "2026-03-01T00:00:00.000Z",
+            updated: "2026-03-02T00:00:00.000Z",
+          },
+        },
+      ],
+    });
+  };
+
+  const result = await runCli({
+    args: ["jira-search", "--jql", "project = ENG", "--max-results", "2", "--start-at", "10"],
+    env: baseEnv,
+    fetchImpl,
+  });
+
+  assert.equal(calls.length, 1);
+  assert.equal(calls[0]?.url, "https://example.atlassian.net/rest/api/3/search");
+  assert.equal(calls[0]?.init?.method, "POST");
+  assert.match(String(calls[0]?.init?.headers), /Authorization/);
+  assert.deepEqual(JSON.parse(String(calls[0]?.init?.body)), {
+    jql: "project = ENG",
+    maxResults: 2,
+    startAt: 10,
+    fields: ["summary", "issuetype", "status", "assignee", "created", "updated"],
+  });
+
+  assert.deepEqual(JSON.parse(result.stdout), {
+    ok: true,
+    data: {
+      issues: [
+        {
+          key: "ENG-1",
+          summary: "Add Jira search command",
+          issueType: "Story",
+          status: "In Progress",
+          assignee: "Ada Lovelace",
+          created: "2026-03-01T00:00:00.000Z",
+          updated: "2026-03-02T00:00:00.000Z",
+          url: "https://example.atlassian.net/browse/ENG-1",
+        },
+      ],
+      startAt: 10,
+      maxResults: 2,
+      total: 25,
+    },
+  });
+});
+
+test("jira-get returns normalized fields plus the raw Jira payload", async () => {
+  const rawIssue = {
+    key: "ENG-42",
+    fields: {
+      summary: "Ship v1",
+      issuetype: { name: "Task" },
+      status: { name: "Done" },
+      assignee: { displayName: "Grace Hopper" },
+      created: "2026-03-03T00:00:00.000Z",
+      updated: "2026-03-04T00:00:00.000Z",
+    },
+  };
+
+  const fetchImpl: typeof fetch = async () => jsonResponse(rawIssue);
+
+  const result = await runCli({
+    args: ["jira-get", "--issue", "ENG-42"],
+    env: baseEnv,
+    fetchImpl,
+  });
+
+  assert.deepEqual(JSON.parse(result.stdout), {
+    ok: true,
+    data: {
+      issue: {
+        key: "ENG-42",
+        summary: "Ship v1",
+        issueType: "Task",
+        status: "Done",
+        assignee: "Grace Hopper",
+        created: "2026-03-03T00:00:00.000Z",
+        updated: "2026-03-04T00:00:00.000Z",
+        url: "https://example.atlassian.net/browse/ENG-42",
+      },
+    },
+    raw: rawIssue,
+  });
+});
+
+test("markdownToAdf converts headings, paragraphs, and bullet lists", () => {
+  assert.deepEqual(markdownToAdf("# Summary\n\nBuild the Jira skill.\n\n- Search\n- Comment"), {
+    type: "doc",
+    version: 1,
+    content: [
+      {
+        type: "heading",
+        attrs: { level: 1 },
+        content: [{ type: "text", text: "Summary" }],
+      },
+      {
+        type: "paragraph",
+        content: [{ type: "text", text: "Build the Jira skill." }],
+      },
+      {
+        type: "bulletList",
+        content: [
+          {
+            type: "listItem",
+            content: [
+              {
+                type: "paragraph",
+                content: [{ type: "text", text: "Search" }],
+              },
+            ],
+          },
+          {
+            type: "listItem",
+            content: [
+              {
+                type: "paragraph",
+                content: [{ type: "text", text: "Comment" }],
+              },
+            ],
+          },
+        ],
+      },
+    ],
+  });
+});
+
+test("jira-create dry-run emits an ADF request body without calling Jira", async () => {
+  const workspace = createTempWorkspace();
+
+  try {
+    workspace.write("description.md", "# New story\n\n- one\n- two");
+    let called = false;
+
+    const result = await runCli({
+      args: [
+        "jira-create",
+        "--type",
+        "Story",
+        "--summary",
+        "Create the Atlassian skill",
+        "--description-file",
+        "description.md",
+        "--dry-run",
+      ],
+      cwd: workspace.cwd,
+      env: {
+        ...baseEnv,
+        ATLASSIAN_DEFAULT_PROJECT: "ENG",
+      },
+      fetchImpl: async () => {
+        called = true;
+        return jsonResponse({});
+      },
+    });
+
+    assert.equal(called, false);
+    assert.deepEqual(JSON.parse(result.stdout), {
+      ok: true,
+      dryRun: true,
+      data: {
+        method: "POST",
+        url: "https://example.atlassian.net/rest/api/3/issue",
+        body: {
+          fields: {
+            project: { key: "ENG" },
+            issuetype: { name: "Story" },
+            summary: "Create the Atlassian skill",
+            description: markdownToAdf("# New story\n\n- one\n- two"),
+          },
+        },
+      },
+    });
+  } finally {
+    workspace.cleanup();
+  }
+});
+
+test("jira-update, jira-comment, and jira-transition dry-runs build the expected Jira requests", async () => {
+  const workspace = createTempWorkspace();
+
+  try {
+    workspace.write("issue.md", "Updated description");
+    workspace.write("comment.md", "Comment body");
+
+    const update = await runCli({
+      args: [
+        "jira-update",
+        "--issue",
+        "ENG-9",
+        "--summary",
+        "Updated summary",
+        "--description-file",
+        "issue.md",
+        "--dry-run",
+      ],
+      cwd: workspace.cwd,
+      env: baseEnv,
+    });
+
+    const comment = await runCli({
+      args: ["jira-comment", "--issue", "ENG-9", "--body-file", "comment.md", "--dry-run"],
+      cwd: workspace.cwd,
+      env: baseEnv,
+    });
+
+    const transition = await runCli({
+      args: ["jira-transition", "--issue", "ENG-9", "--transition", "31", "--dry-run"],
+      cwd: workspace.cwd,
+      env: baseEnv,
+    });
+
+    assert.deepEqual(JSON.parse(update.stdout), {
+      ok: true,
+      dryRun: true,
+      data: {
+        method: "PUT",
+        url: "https://example.atlassian.net/rest/api/3/issue/ENG-9",
+        body: {
+          fields: {
+            summary: "Updated summary",
+            description: markdownToAdf("Updated description"),
+          },
+        },
+      },
+    });
+
+    assert.deepEqual(JSON.parse(comment.stdout), {
+      ok: true,
+      dryRun: true,
+      data: {
+        method: "POST",
+        url: "https://example.atlassian.net/rest/api/3/issue/ENG-9/comment",
+        body: {
+          body: markdownToAdf("Comment body"),
+        },
+      },
+    });
+
+    assert.deepEqual(JSON.parse(transition.stdout), {
+      ok: true,
+      dryRun: true,
+      data: {
+        method: "POST",
+        url: "https://example.atlassian.net/rest/api/3/issue/ENG-9/transitions",
+        body: {
+          transition: {
+            id: "31",
+          },
+        },
+      },
+    });
+  } finally {
+    workspace.cleanup();
+  }
+});
+
+test("jira-transitions returns normalized transition options", async () => {
+  const fetchImpl: typeof fetch = async () =>
+    jsonResponse({
+      transitions: [
+        {
+          id: "21",
+          name: "Start Progress",
+          to: { name: "In Progress" },
+          hasScreen: false,
+        },
+      ],
+    });
+
+  const result = await runCli({
+    args: ["jira-transitions", "--issue", "ENG-9"],
+    env: baseEnv,
+    fetchImpl,
+  });
+
+  assert.deepEqual(JSON.parse(result.stdout), {
+    ok: true,
+    data: {
+      transitions: [
+        {
+          id: "21",
+          name: "Start Progress",
+          toStatus: "In Progress",
+          hasScreen: false,
+        },
+      ],
+    },
+  });
+});