Fission-AI/OpenSpec · error

Tool ' ' does not support skill generation. Tools with…

Error message

Tool '${toolId}' does not support skill generation.
Tools with skill generation support:
  ${validToolsWithSkills.join('\n  ')}

What it means

Thrown in InitCommand when a selected tool exists but toolSupportsSkills(tool) is false — the tool is valid yet has no skills directory support, so skill generation for it is impossible. Input at fault is the toolId; the message enumerates tools that do support skill generation.

Solutions

1. Remove the unsupported tool from the skill generation set
2. Choose a tool listed in the message's supported list
3. Use --tools to select only skill-capable tools

When it happens

Trigger: Thrown at src/core/init.ts:815 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/73b6af24c6bafd5a. Report an issue: GitHub.

Appendix: source

Thrown at src/core/init.ts:815

      console.log(
        chalk.dim(
          `Codex, Zed, and agents share .agents/skills; writing one tree for ${sharedTargetOwner}.`
        )
      );
    }

    for (const toolId of reconciledToolIds) {
      const tool = AI_TOOLS.find((t) => t.value === toolId);
      if (!tool) {
        const validToolIds = getToolsWithSkillsDir();
        throw new Error(
          `Unknown tool '${toolId}'. Valid tools:\n  ${validToolIds.join('\n  ')}`
        );
      }

      if (!toolSupportsSkills(tool)) {
        const validToolsWithSkills = getToolsWithSkillsDir();
        throw new Error(
          `Tool '${toolId}' does not support skill generation.\nTools with skill generation support:\n  ${validToolsWithSkills.join('\n  ')}`
        );
      }

      const preState = toolStates.get(tool.value);
      const skillsPath = resolveToolSkillsDir(projectPath, tool);
      const isGlobalSkillTarget = hasGlobalSkillTarget(tool);
      validatedTools.push({
        value: tool.value,
        name: tool.name,
        skillsDir: tool.skillsDir,
        skillsPath,
        skillsRoot: isGlobalSkillTarget ? skillsPath : projectPath,
        isGlobalSkillTarget,
        wasConfigured: preState?.configured ?? false,
        requiresIdeRestart: tool.requiresIdeRestart,
      });
    }

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