feat: Linear Task Tracker

docs/linear-tracker.md

@@ -0,0 +1,119 @@
+# Linear Tracker Plugin
+
+Use Linear as a task tracker for Ralph TUI. Tasks are managed as child issues under a parent (epic) issue in Linear.
+
+## Setup
+
+### 1. Get a Linear API Key
+
+Create a personal API key at: Settings > API > Personal API Keys
+
+### 2. Configure Authentication
+
+Set the `LINEAR_API_KEY` environment variable:
+
+```bash
+export LINEAR_API_KEY="lin_api_..."
+```
+
+Or add it to your project config (`.ralph-tui/config.toml`):
+
+```toml
+[[trackers]]
+name = "linear"
+plugin = "linear"
+
+  [trackers.options]
+  apiKey = "lin_api_..."
+```
+
+Auth precedence: explicit config `apiKey` overrides `LINEAR_API_KEY` env var.
+
+## Converting a PRD to Linear Issues
+
+Use `convert --to linear` to import a PRD into Linear as a parent issue with child issues:
+
+```bash
+# Basic: create parent + children in the ENG team
+ralph-tui convert --to linear --team ENG ./prd.md
+
+# Use an existing parent issue
+ralph-tui convert --to linear --team ENG --parent ENG-123 ./prd.md
+
+# With project and labels
+ralph-tui convert --to linear --team ENG --project "Q1 Sprint" --labels "backend,mvp" ./prd.md
+```
+
+### Options
+
+| Flag | Required | Description |
+|------|----------|-------------|
+| `--team <key>` | Yes | Linear team key (e.g., `ENG`) |
+| `--parent <issue>` | No | Existing parent issue key or UUID. Auto-creates if omitted. |
+| `--project <name>` | No | Linear project name or UUID |
+| `--labels <list>` | No | Comma-separated labels to apply |
+
+Each PRD user story becomes a child issue with:
+- Title: `<story-id>: <story-title>`
+- Structured markdown body with Ralph metadata, description, and acceptance criteria
+- Native Linear blocking relations from PRD `dependsOn` fields
+
+## Running Tasks from Linear
+
+Run Ralph against child issues of a parent (epic) issue:
+
+```bash
+ralph-tui run --tracker linear --epic ENG-123
+```
+
+The `--epic` flag is required for the Linear tracker in MVP. It accepts either an issue key (`ENG-123`) or a UUID.
+
+### How It Works
+
+1. Ralph fetches all child issues under the specified parent
+2. Tasks are ordered by `Ralph Priority` metadata embedded in issue bodies (ascending, lower = higher priority)
+3. In-progress tasks are preferred over open tasks
+4. Dependency-blocked tasks are excluded from selection
+5. On task completion, Ralph moves the issue to the "completed" workflow state and posts a comment
+
+### Status Mapping
+
+| Linear State Type | Ralph Status |
+|-------------------|-------------|
+| `triage`, `backlog`, `unstarted` | `open` |
+| `started` | `in_progress` |
+| `completed` | `completed` |
+| `canceled` | `cancelled` |
+
+### Priority Model
+
+PRD story priorities are preserved as unbounded integers in the issue body metadata (`Ralph Priority`). These are mapped to Linear's coarse 0-4 scale for compatibility:
+
+```
+coarse_priority = min(4, max(0, ralph_priority - 1))
+```
+
+Task selection uses the full `Ralph Priority` value for fine-grained ordering.
+
+## Configuration Reference
+
+```toml
+# .ralph-tui/config.toml
+
+# Set linear as default tracker
+tracker = "linear"
+
+# Or configure with options
+[[trackers]]
+name = "linear"
+plugin = "linear"
+
+  [trackers.options]
+  apiKey = "lin_api_..."  # Optional if LINEAR_API_KEY is set
+```
+
+Run with:
+
+```bash
+ralph-tui run --tracker linear --epic ENG-123
+```

package.json

@@ -69,11 +69,12 @@
     "typescript": "^5.9.3"
   },
   "dependencies": {
+    "@linear/sdk": "^76.0.0",
     "@opentui/core": "^0.1.72",
     "@opentui/react": "^0.1.72",
-    "react": "^19.2.3",
     "handlebars": "^4.7.8",
     "node-notifier": "^8.0.2",
+    "react": "^19.2.3",
     "smol-toml": "^1.6.0",
     "yaml": "^2.8.2",
     "zod": "^4.3.5"

src/commands/convert.test.ts

@@ -0,0 +1,187 @@
+/**
+ * ABOUTME: Unit tests for convert command argument parsing and Linear conversion logic.
+ * Covers Linear-specific argument validation, format support, and parent resolution modes.
+ */
+
+import { describe, expect, test } from 'bun:test';
+import { parseConvertArgs } from './convert.js';
+
+describe('parseConvertArgs', () => {
+  describe('format support', () => {
+    test('accepts --to json', () => {
+      const result = parseConvertArgs(['--to', 'json', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.to).toBe('json');
+    });
+
+    test('accepts --to beads', () => {
+      const result = parseConvertArgs(['--to', 'beads', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.to).toBe('beads');
+    });
+
+    test('accepts --to linear', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.to).toBe('linear');
+    });
+
+    test('rejects unsupported format', () => {
+      const result = parseConvertArgs(['--to', 'jira', 'input.md']);
+      expect(result).toBeNull();
+    });
+
+    test('accepts -t shorthand for format', () => {
+      const result = parseConvertArgs(['-t', 'json', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.to).toBe('json');
+    });
+  });
+
+  describe('required arguments', () => {
+    test('requires --to flag', () => {
+      const result = parseConvertArgs(['input.md']);
+      expect(result).toBeNull();
+    });
+
+    test('requires input file', () => {
+      const result = parseConvertArgs(['--to', 'json']);
+      expect(result).toBeNull();
+    });
+  });
+
+  describe('Linear-specific options', () => {
+    test('--team is required for linear format', () => {
+      const result = parseConvertArgs(['--to', 'linear', 'input.md']);
+      expect(result).toBeNull();
+    });
+
+    test('accepts --team flag', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.team).toBe('ENG');
+    });
+
+    test('accepts --project flag', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', '--project', 'Q1 Sprint', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.project).toBe('Q1 Sprint');
+    });
+
+    test('accepts --parent flag with issue key', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', '--parent', 'ENG-123', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.parent).toBe('ENG-123');
+    });
+
+    test('accepts --parent flag with UUID', () => {
+      const result = parseConvertArgs([
+        '--to', 'linear', '--team', 'ENG',
+        '--parent', 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+        'input.md',
+      ]);
+      expect(result).not.toBeNull();
+      expect(result!.parent).toBe('a1b2c3d4-e5f6-7890-abcd-ef1234567890');
+    });
+
+    test('--team not required for non-linear formats', () => {
+      const result = parseConvertArgs(['--to', 'json', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.team).toBeUndefined();
+    });
+
+    test('accepts all Linear options together', () => {
+      const result = parseConvertArgs([
+        '--to', 'linear',
+        '--team', 'ENG',
+        '--project', 'Sprint 1',
+        '--parent', 'ENG-42',
+        '--labels', 'backend,mvp',
+        '--verbose',
+        'prd.md',
+      ]);
+      expect(result).not.toBeNull();
+      expect(result!.to).toBe('linear');
+      expect(result!.team).toBe('ENG');
+      expect(result!.project).toBe('Sprint 1');
+      expect(result!.parent).toBe('ENG-42');
+      expect(result!.labels).toEqual(['backend', 'mvp']);
+      expect(result!.verbose).toBe(true);
+      expect(result!.input).toBe('prd.md');
+    });
+  });
+
+  describe('common options', () => {
+    test('parses --labels as comma-separated list', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', '--labels', 'a,b,c', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.labels).toEqual(['a', 'b', 'c']);
+    });
+
+    test('trims whitespace from labels', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', '--labels', ' a , b ', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.labels).toEqual(['a', 'b']);
+    });
+
+    test('filters empty labels', () => {
+      const result = parseConvertArgs(['--to', 'linear', '--team', 'ENG', '--labels', 'a,,b', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.labels).toEqual(['a', 'b']);
+    });
+
+    test('parses --force flag', () => {
+      const result = parseConvertArgs(['--to', 'json', '--force', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.force).toBe(true);
+    });
+
+    test('parses --verbose flag', () => {
+      const result = parseConvertArgs(['--to', 'json', '--verbose', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.verbose).toBe(true);
+    });
+
+    test('parses -f shorthand for force', () => {
+      const result = parseConvertArgs(['-t', 'json', '-f', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.force).toBe(true);
+    });
+
+    test('parses -v shorthand for verbose', () => {
+      const result = parseConvertArgs(['-t', 'json', '-v', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.verbose).toBe(true);
+    });
+
+    test('parses --output flag', () => {
+      const result = parseConvertArgs(['--to', 'json', '--output', 'out.json', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.output).toBe('out.json');
+    });
+
+    test('parses --branch flag', () => {
+      const result = parseConvertArgs(['--to', 'json', '--branch', 'feature/test', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.branch).toBe('feature/test');
+    });
+
+    test('positional argument is the input file', () => {
+      const result = parseConvertArgs(['--to', 'json', 'my-prd.md']);
+      expect(result).not.toBeNull();
+      expect(result!.input).toBe('my-prd.md');
+    });
+
+    test('defaults for optional flags', () => {
+      const result = parseConvertArgs(['--to', 'json', 'input.md']);
+      expect(result).not.toBeNull();
+      expect(result!.force).toBe(false);
+      expect(result!.verbose).toBe(false);
+      expect(result!.output).toBeUndefined();
+      expect(result!.branch).toBeUndefined();
+      expect(result!.labels).toBeUndefined();
+      expect(result!.project).toBeUndefined();
+      expect(result!.parent).toBeUndefined();
+    });
+  });
+});