${specName} validation failed - duplicate requirement in ADD

Error message

${specName} validation failed - duplicate requirement in ADDED for header "### Requirement: ${add.name}"

What it means

Error "${specName} validation failed - duplicate requirement in ADDED for header "### Requirement: ${add.name}"" thrown in Fission-AI/OpenSpec.

Source

Thrown at src/core/specs-apply.ts:202

    warnings.push(message);
    if (!options.silent) {
      console.log(chalk.yellow(`⚠️  Warning: ${message}`));
    }
  };
  // Read change spec content (delta-format expected)
  assertTrustedSpecPath(update.sourceRoot, update.source);
  const changeContent = await fs.readFile(update.source, 'utf-8');

  // Parse deltas from the change spec file
  const plan = parseDeltaSpec(changeContent);
  const specName = update.id;

  // Pre-validate duplicates within sections
  const addedNames = new Set<string>();
  for (const add of plan.added) {
    const name = normalizeRequirementName(add.name);
    if (addedNames.has(name)) {
      throw new Error(
        `${specName} validation failed - duplicate requirement in ADDED for header "### Requirement: ${add.name}"`
      );
    }
    addedNames.add(name);
  }
  const modifiedNames = new Set<string>();
  for (const mod of plan.modified) {
    const name = normalizeRequirementName(mod.name);
    if (modifiedNames.has(name)) {
      throw new Error(
        `${specName} validation failed - duplicate requirement in MODIFIED for header "### Requirement: ${mod.name}"`
      );
    }
    modifiedNames.add(name);
  }
  const removedNamesSet = new Set<string>();
  for (const rem of plan.removed) {
    const name = normalizeRequirementName(rem);

View on GitHub (pinned to 6926ccb18a)

When it happens

Trigger: Thrown at src/core/specs-apply.ts:202 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Fission-AI/OpenSpec@6926ccb18a (2026-08-25). Data as JSON: /api/errors/c4c800a7f974d6d9. Report an issue: GitHub.