hooks-claude-code: skipping unsupported "${s.type}" hook on

Error message

hooks-claude-code: skipping unsupported "${s.type}" hook on ${s.event} (only command hooks run)

What it means

Error "hooks-claude-code: skipping unsupported "${s.type}" hook on ${s.event} (only command hooks run)" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/hooks/hooks-claude-code/src/index.ts:111

  }
}

export function apply(ctx: Context, config: Config): void {
  // Validate before config parsing so a bad value cannot be hidden by its early return.
  const stderrSummaryMaxChars = config.stderrSummaryMaxChars ?? DEFAULT_STDERR_SUMMARY_MAX_CHARS
  assertPositiveInteger('stderrSummaryMaxChars', stderrSummaryMaxChars)
  const defaultTimeoutMs = config.defaultTimeoutMs ?? DEFAULT_HOOK_TIMEOUT_MS
  // Parse once at load. A read or parse failure logs and registers nothing.
  let parsed: ClaudeCodeHookConfig = {}
  try {
    const raw: unknown = JSON.parse(readFileSync(config.configPath, 'utf8'))
    const result = parseClaudeCodeConfig(raw, {
      ...config.pluginRoot !== undefined ? { pluginRoot: config.pluginRoot } : {},
      ...config.projectDir !== undefined ? { projectDir: config.projectDir } : {},
    })
    parsed = result.config
    for (const s of result.skipped) {
      ctx.logger.warn(`hooks-claude-code: skipping unsupported "${s.type}" hook on ${s.event} (only command hooks run)`)
    }
  } catch (error: unknown) {
    ctx.logger.warn(`hooks-claude-code: could not load hook config "${config.configPath}": ${String(error)} — no hooks registered`)
    return
  }

  // Emit-shaped points run detached, so track their chains; disposal aborts
  // active hooks and drains continuations before resolving.
  const detached = createDetachedRuns()
  // Only the start edge guarantees registry access. Retain each local child
  // through its paired end so stop hooks keep the session workspace after the
  // handle unregisters the agent. Every retained entry relies on that paired
  // end; a producer that can omit it must provide another release edge.
  const subagentChildren = new Map<SubagentRunId, Agent>()
  ctx.effect(() => () => detached.drain(), 'hooks-claude-code: drain detached hook runs')

  /**
   * Run every command hook configured for `point` whose matcher selects

View on GitHub (pinned to b150a551b8)

Solutions

Change the hook to a command hook; only command hooks run for the Claude Code bridge.

When it happens

Trigger: Thrown at packages/hooks/hooks-claude-code/src/index.ts:111 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/4d5a56ce8d71fb31. Report an issue: GitHub.