Initial import from garrytan/gstack@026751e (main snapshot via local relay)

Source: https://github.com/garrytan/gstack/commit/026751e

test/helpers/skill-parser.ts

@@ -0,0 +1,211 @@
+/**
+ * SKILL.md parser and validator.
+ *
+ * Extracts $B commands from code blocks, validates them against
+ * the command registry and snapshot flags.
+ *
+ * Used by:
+ *   - test/skill-validation.test.ts (Tier 1 static tests)
+ *   - scripts/skill-check.ts (health summary)
+ *   - scripts/dev-skill.ts (watch mode)
+ */
+
+import { ALL_COMMANDS } from '../../browse/src/commands';
+import { parseSnapshotArgs } from '../../browse/src/snapshot';
+import * as fs from 'fs';
+import * as path from 'path';
+
+/** CLI-only commands: valid $B invocations that are handled by the CLI, not the server */
+const CLI_COMMANDS = new Set([
+  'status', 'pair-agent', 'tunnel',
+]);
+
+export interface BrowseCommand {
+  command: string;
+  args: string[];
+  line: number;
+  raw: string;
+}
+
+export interface ValidationResult {
+  valid: BrowseCommand[];
+  invalid: BrowseCommand[];
+  snapshotFlagErrors: Array<{ command: BrowseCommand; error: string }>;
+  warnings: string[];
+}
+
+/**
+ * Extract all $B invocations from bash code blocks in a SKILL.md file.
+ */
+export function extractBrowseCommands(skillPath: string): BrowseCommand[] {
+  const content = fs.readFileSync(skillPath, 'utf-8');
+  const lines = content.split('\n');
+  const commands: BrowseCommand[] = [];
+
+  let inBashBlock = false;
+
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i];
+
+    // Detect code block boundaries
+    if (line.trimStart().startsWith('```')) {
+      if (inBashBlock) {
+        inBashBlock = false;
+      } else if (line.trimStart().startsWith('```bash')) {
+        inBashBlock = true;
+      }
+      // Non-bash code blocks (```json, ```, ```js, etc.) are skipped
+      continue;
+    }
+
+    if (!inBashBlock) continue;
+
+    // Match lines with $B command invocations
+    // Handle multiple $B commands on one line (e.g., "$B click @e3       $B fill @e4 "value"")
+    const matches = line.matchAll(/\$B\s+(\S+)(?:\s+([^\$]*))?/g);
+    for (const match of matches) {
+      const command = match[1];
+      let argsStr = (match[2] || '').trim();
+
+      // Strip inline comments (# ...) — but not inside quotes
+      // Simple approach: remove everything from first unquoted # onward
+      let inQuote = false;
+      for (let j = 0; j < argsStr.length; j++) {
+        if (argsStr[j] === '"') inQuote = !inQuote;
+        if (argsStr[j] === '#' && !inQuote) {
+          argsStr = argsStr.slice(0, j).trim();
+          break;
+        }
+      }
+
+      // Parse args — handle quoted strings
+      const args: string[] = [];
+      if (argsStr) {
+        const argMatches = argsStr.matchAll(/"([^"]*)"|(\S+)/g);
+        for (const am of argMatches) {
+          args.push(am[1] ?? am[2]);
+        }
+      }
+
+      commands.push({
+        command,
+        args,
+        line: i + 1, // 1-based
+        raw: match[0].trim(),
+      });
+    }
+  }
+
+  return commands;
+}
+
+/**
+ * Extract and validate all $B commands in a SKILL.md file.
+ */
+export function validateSkill(skillPath: string): ValidationResult {
+  const commands = extractBrowseCommands(skillPath);
+  const result: ValidationResult = {
+    valid: [],
+    invalid: [],
+    snapshotFlagErrors: [],
+    warnings: [],
+  };
+
+  if (commands.length === 0) {
+    result.warnings.push('no $B commands found');
+    return result;
+  }
+
+  for (const cmd of commands) {
+    if (!ALL_COMMANDS.has(cmd.command) && !CLI_COMMANDS.has(cmd.command)) {
+      result.invalid.push(cmd);
+      continue;
+    }
+
+    // Validate snapshot flags
+    if (cmd.command === 'snapshot' && cmd.args.length > 0) {
+      try {
+        parseSnapshotArgs(cmd.args);
+      } catch (err: any) {
+        result.snapshotFlagErrors.push({ command: cmd, error: err.message });
+        continue;
+      }
+    }
+
+    result.valid.push(cmd);
+  }
+
+  return result;
+}
+
+/**
+ * Extract all REMOTE_SLUG=$(...) assignment patterns from .md files in given subdirectories.
+ * Returns a Map from filename → array of full assignment lines found.
+ */
+export function extractRemoteSlugPatterns(rootDir: string, subdirs: string[]): Map<string, string[]> {
+  const results = new Map<string, string[]>();
+  const pattern = /^REMOTE_SLUG=\$\(.*\)$/;
+
+  for (const subdir of subdirs) {
+    const dir = path.join(rootDir, subdir);
+    if (!fs.existsSync(dir)) continue;
+
+    const files = fs.readdirSync(dir).filter(f => f.endsWith('.md'));
+    for (const file of files) {
+      const filePath = path.join(dir, file);
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const matches: string[] = [];
+
+      for (const line of content.split('\n')) {
+        const trimmed = line.trim();
+        if (pattern.test(trimmed)) {
+          matches.push(trimmed);
+        }
+      }
+
+      if (matches.length > 0) {
+        results.set(`${subdir}/${file}`, matches);
+      }
+    }
+  }
+
+  return results;
+}
+
+/**
+ * Parse a markdown weight table anchored to a "### Weights" heading.
+ * Expects rows like: | Category | 15% |
+ * Returns Map<category, number> where number is the percentage (e.g., 15).
+ */
+export function extractWeightsFromTable(content: string): Map<string, number> {
+  const weights = new Map<string, number>();
+
+  // Find the ### Weights section
+  const weightsIdx = content.indexOf('### Weights');
+  if (weightsIdx === -1) return weights;
+
+  // Find the table within that section (stop at next heading or end)
+  const section = content.slice(weightsIdx);
+  const lines = section.split('\n');
+
+  for (let i = 1; i < lines.length; i++) {
+    const line = lines[i].trim();
+
+    // Stop at next heading
+    if (line.startsWith('#') && !line.startsWith('###')) break;
+    if (line.startsWith('### ') && i > 0) break;
+
+    // Parse table rows: | Category | N% |
+    const match = line.match(/^\|\s*(\w[\w\s]*\w|\w+)\s*\|\s*(\d+)%\s*\|$/);
+    if (match) {
+      const category = match[1].trim();
+      const pct = parseInt(match[2], 10);
+      // Skip header row
+      if (category !== 'Category' && !isNaN(pct)) {
+        weights.set(category, pct);
+      }
+    }
+  }
+
+  return weights;
+}