deepseek-ai/deepseek-harness · error

skills/change listener threw: ${errorMessage(error)}

Error message

skills/change listener threw: ${errorMessage(error)}

What it means

Error "skills/change listener threw: ${errorMessage(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/skill/skill/src/index.ts:657

      this.scopeIds.set(key, id)
    }
    return id
  }

  private collectCacheKey(cwd: string | undefined, chain: ScopeKey[], revision: number): string {
    return JSON.stringify({ cwd, scopes: chain.map(key => this.scopeId(key)), revision })
  }

  /** Notify catalog observers without making their refresh work load-bearing. */
  private notifyChange(): void {
    for (const callback of this.ctx.events.dispatch('emit', ['skills/change'])) {
      try {
        const returned: unknown = callback()
        void Promise.resolve(returned).catch((error: unknown) => {
          this.ctx.logger.warn(`skills/change listener rejected: ${errorMessage(error)}`)
        })
      } catch (error: unknown) {
        this.ctx.logger.warn(`skills/change listener threw: ${errorMessage(error)}`)
      }
    }
  }
}

function normalizeProviderObservation(output: unknown, providerName: string): SkillProviderObservation {
  if (Array.isArray(output)) {
    return { candidates: output as readonly SkillCandidate[], complete: true }
  }
  if (output === null || typeof output !== 'object') {
    throw invalidProviderObservation(providerName)
  }
  const observation = output as Partial<SkillProviderObservation>
  if (!Array.isArray(observation.candidates) || typeof observation.complete !== 'boolean') {
    throw invalidProviderObservation(providerName)
  }
  return observation as SkillProviderObservation
}

View on GitHub (pinned to b150a551b8)

Solutions

1. Fix the exception in the skills/change listener; wrap risky work in try/catch and reload the catalog.

When it happens

Trigger: Thrown at packages/skill/skill/src/index.ts:657 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/b6100a91c6d5afa7. Report an issue: GitHub.