Allow passing --link to add links to a release

README.md

@@ -155,6 +155,7 @@ linear-release update --stage="in review" --name="Release 1.2.0"
 | `--release-version` | `sync`, `complete`, `update` | Release version identifier. For `sync`, defaults to short commit hash. For `complete` and `update`, selects an existing release with that version (errors if none exists); does not change a release's version. If omitted, targets the most recent started release. |
 | `--stage`           | `update`                     | Target deployment stage (required for `update`)                                                                                                                                                                                                                      |
 | `--include-paths`   | `sync`                       | Filter commits by changed file paths                                                                                                                                                                                                                                 |
+| `--link`            | `sync`, `complete`, `update` | Add a link to the targeted release. Use `--link "https://example.com"` or `--link "Label=https://example.com"`; repeat the flag to add multiple links.                                                                                                               |
 | `--base-ref`        | `sync`                       | Override the scan base. Exclusive: scans `<base-ref>..HEAD`.                                                                                                                                                                                                         |
 | `--json`            | `sync`, `complete`, `update` | Output result as JSON on stdout. Logs are emitted as JSON Lines (one object per line) on stderr.                                                                                                                                                                     |
 | `--quiet`           | `sync`, `complete`, `update` | Suppress info-level output. Warnings and errors are still printed.                                                                                                                                                                                                   |
@@ -210,13 +211,33 @@ Patterns use [Git pathspec](https://git-scm.com/docs/gitglossary#Documentation/g
 
 Path patterns can also be configured in your pipeline settings in Linear. If both are set, the CLI `--include-paths` option takes precedence.
 
+### Release Links
+
+`--link` attaches external URLs to the release — a GitHub release page, a CI run, a deployment dashboard.
+
+```bash
+# Bare URL — Linear derives the label ("GitHub" here)
+linear-release sync --link "https://github.com/acme/app/releases/tag/v1.2.0"
+
+# Multiple labeled links
+linear-release sync \
+  --link "CI run=https://ci.example.com/run/123" \
+  --link "Deploy dashboard=https://deploys.example.com/v1.2.0"
+
+# Works on complete and update too
+linear-release complete --release-version="1.2.0" \
+  --link "https://github.com/acme/app/releases/tag/v1.2.0"
+```
+
+Each value is either an absolute URL or `Label=URL`. Both `--link "Label=..."` and `--link="Label=..."` are accepted. `http(s)` is the typical scheme; the server rejects unsafe ones like `javascript:` or `data:`.
+
 ## How It Works
 
 1. **Fetches the latest release** from your Linear pipeline to determine the commit range
 2. **Scans commits** between the commit from the last release and the current commit
 3. **Extracts issue identifiers** from branch names and commit messages (e.g., `feat/ENG-123-add-feature`)
 4. **Detects pull/merge request numbers** from commit messages — GitHub `Title (#42)` / `Merge pull request #42`, and GitLab `See merge request <group>/<project>!42` trailers (emitted whenever a merge commit is created)
-5. **Syncs data to Linear** that adds issues to a newly created completed release (continuous pipelines) or the currently in-progress release (scheduled pipelines). PR/MR numbers are sent alongside the repository info, and Linear resolves them back to any issues linked to those PRs/MRs — so issues attached only via a PR/MR (not mentioned in a commit message or branch name) are still picked up.
+5. **Syncs data to Linear** that adds issues and provided links to a newly created completed release (continuous pipelines) or the currently in-progress release (scheduled pipelines). PR/MR numbers are sent alongside the repository info, and Linear resolves them back to any issues linked to those PRs/MRs — so issues attached only via a PR/MR (not mentioned in a commit message or branch name) are still picked up.
 
 > [!NOTE]
 > **First sync**: when no prior release exists for the pipeline, only the current commit is scanned (there's no previous SHA to bound the range from).

src/args.test.ts

@@ -91,6 +91,70 @@ describe("parseCLIArgs", () => {
     expect(result.includePaths).toEqual(["apps/web/**", "packages/**"]);
   });
 
+  it("parses repeatable --link values", () => {
+    const result = parseCLIArgs([
+      "sync",
+      "--link",
+      "Pipeline=https://ci.example.com/run/123?attempt=1",
+      "--link=GitHub release=https://github.com/acme/app/releases/tag/v1.2.0",
+    ]);
+
+    expect(result.links).toEqual([
+      { label: "Pipeline", url: "https://ci.example.com/run/123?attempt=1" },
+      { label: "GitHub release", url: "https://github.com/acme/app/releases/tag/v1.2.0" },
+    ]);
+  });
+
+  it("parses --link with a bare URL and derives the label", () => {
+    const result = parseCLIArgs(["sync", "--link", "https://github.com/acme/app/actions/runs/123"]);
+
+    expect(result.links).toEqual([{ url: "https://github.com/acme/app/actions/runs/123" }]);
+  });
+
+  it("parses --link with a bare URL containing equals signs", () => {
+    const result = parseCLIArgs(["sync", "--link", "https://ci.example.com/run?id=123&attempt=1"]);
+
+    expect(result.links).toEqual([{ url: "https://ci.example.com/run?id=123&attempt=1" }]);
+  });
+
+  it("trims --link labels and URLs", () => {
+    const result = parseCLIArgs(["sync", "--link", " Pipeline = https://ci.example.com/run/123 "]);
+
+    expect(result.links).toEqual([{ label: "Pipeline", url: "https://ci.example.com/run/123" }]);
+  });
+
+  it("throws on --link with neither URL nor label separator", () => {
+    expect(() => parseCLIArgs(["sync", "--link", "not-a-url"])).toThrow('Invalid --link value: "not-a-url"');
+  });
+
+  it("throws on --link with empty label", () => {
+    expect(() => parseCLIArgs(["sync", "--link", "=https://ci.example.com/run/123"])).toThrow(
+      "Link label must not be empty",
+    );
+  });
+
+  it("throws on --link with empty URL", () => {
+    expect(() => parseCLIArgs(["sync", "--link", "Pipeline="])).toThrow("Link URL must not be empty");
+  });
+
+  it("accepts non-http URL schemes and defers protocol validation to the server", () => {
+    const result = parseCLIArgs(["sync", "--link", "Pipeline=ftp://ci.example.com/run/123"]);
+
+    expect(result.links).toEqual([{ label: "Pipeline", url: "ftp://ci.example.com/run/123" }]);
+  });
+
+  it("parses --link with complete", () => {
+    const result = parseCLIArgs(["complete", "--link", "Pipeline=https://ci.example.com/run/123"]);
+
+    expect(result.links).toEqual([{ label: "Pipeline", url: "https://ci.example.com/run/123" }]);
+  });
+
+  it("parses --link with update", () => {
+    const result = parseCLIArgs(["update", "--stage", "production", "--link", "https://ci.example.com/run/123"]);
+
+    expect(result.links).toEqual([{ url: "https://ci.example.com/run/123" }]);
+  });
+
   it("throws on unknown flags (strict mode)", () => {
     expect(() => parseCLIArgs(["--unknown-flag"])).toThrow();
   });

src/args.ts

@@ -1,18 +1,59 @@
 import { parseArgs } from "node:util";
 import { LogLevel } from "./log";
 
+export type ReleaseLink = {
+  label?: string;
+  url: string;
+};
+
 export type ParsedCLIArgs = {
   command: string;
   releaseName?: string;
   releaseVersion?: string;
   stageName?: string;
   baseRef?: string;
   includePaths: string[];
+  links: ReleaseLink[];
   jsonOutput: boolean;
   timeoutSeconds: number;
   logLevel: LogLevel;
 };
 
+function parseReleaseLink(value: string): ReleaseLink {
+  const bareUrl = parseAbsoluteUrl(value.trim());
+  if (bareUrl) {
+    return { url: bareUrl.href };
+  }
+
+  const separatorIndex = value.indexOf("=");
+  if (separatorIndex === -1) {
+    throw new Error(`Invalid --link value: "${value}". Expected "https://example.com" or "Label=https://example.com".`);
+  }
+  const label = value.slice(0, separatorIndex).trim();
+  const url = value.slice(separatorIndex + 1).trim();
+  if (!label) {
+    throw new Error(`Invalid --link value: "${value}". Link label must not be empty.`);
+  }
+  if (!url) {
+    throw new Error(`Invalid --link value: "${value}". Link URL must not be empty.`);
+  }
+
+  const parsedUrl = parseAbsoluteUrl(url);
+  if (!parsedUrl) {
+    throw new Error(`Invalid --link URL: "${url}". Expected an absolute URL with a scheme (e.g. https://example.com).`);
+  }
+
+  return { label, url: parsedUrl.href };
+}
+
+function parseAbsoluteUrl(value: string): URL | undefined {
+  try {
+    return new URL(value);
+  } catch {
+    return undefined;
+  }
+}
+
 export function parseCLIArgs(argv: string[]): ParsedCLIArgs {
   const { values, positionals } = parseArgs({
     args: argv,
@@ -22,6 +63,7 @@ export function parseCLIArgs(argv: string[]): ParsedCLIArgs {
       stage: { type: "string" },
       "base-ref": { type: "string" },
       "include-paths": { type: "string" },
+      link: { type: "string", multiple: true },
       json: { type: "boolean", default: false },
       timeout: { type: "string" },
       quiet: { type: "boolean", default: false },
@@ -49,8 +91,11 @@ export function parseCLIArgs(argv: string[]): ParsedCLIArgs {
   if (values.quiet) logLevel = LogLevel.Quiet;
   else if (values.verbose) logLevel = LogLevel.Verbose;
 
+  const command = positionals[0] || "sync";
+  const links = (values.link ?? []).map(parseReleaseLink);
+
   return {
-    command: positionals[0] || "sync",
+    command,
     releaseName: values.name,
     releaseVersion: values["release-version"],
     stageName: values.stage,
@@ -61,6 +106,7 @@ export function parseCLIArgs(argv: string[]): ParsedCLIArgs {
           .map((p) => p.trim())
           .filter((p) => p.length > 0)
       : [],
+    links,
     jsonOutput: values.json ?? false,
     timeoutSeconds,
     logLevel,