Fission-AI/OpenSpec · error

Some rules for ' ' are empty strings, ignoring them

Error message

Some rules for '${artifactId}' are empty strings, ignoring them

What it means

Warning from readProjectConfig while parsing config rules: an artifact's rules array contained empty strings, which are dropped. Remaining valid rules are kept, so this reports partial cleanup of the rules.<artifactId> list rather than rejecting the artifact's rules entirely.

Solutions

1. Delete blank entries from the artifact's rules list
2. Replace empty strings with real rule text

When it happens

Trigger: Thrown at src/core/project-config.ts:337 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/74d20bb032b02698. Report an issue: GitHub.

Appendix: source

Thrown at src/core/project-config.ts:337

        // Artifact ids are intentionally not restricted to the built-in naming
        // convention, so keys such as "constructor" remain valid for custom
        // schemas. A null-prototype map preserves those keys as data without
        // letting "__proto__" mutate the lookup object's prototype.
        const parsedRules: Record<string, string[]> = Object.create(null);
        let hasValidRules = false;

        for (const [artifactId, rules] of Object.entries(raw.rules)) {
          const rulesArrayResult = z.array(z.string()).safeParse(rules);

          if (rulesArrayResult.success) {
            // Filter out empty strings
            const validRules = rulesArrayResult.data.filter((r) => r.length > 0);
            if (validRules.length > 0) {
              parsedRules[artifactId] = validRules;
              hasValidRules = true;
            }
            if (validRules.length < rulesArrayResult.data.length) {
              console.warn(
                `Some rules for '${artifactId}' are empty strings, ignoring them`
              );
            }
          } else {
            console.warn(
              `Rules for '${artifactId}' must be an array of strings, ignoring this artifact's rules`
            );
          }
        }

        if (hasValidRules) {
          config.rules = parsedRules;
        }
      } else {
        console.warn(`Invalid 'rules' field in config (must be object)`);
      }
    }

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