deepseek-ai/deepseek-harness · error

hooks-codex: ${point} hook emitted a systemMessage, which is

Error message

hooks-codex: ${point} hook emitted a systemMessage, which is not yet surfaced (ignored)

What it means

Error "hooks-codex: ${point} hook emitted a systemMessage, which is not yet surfaced (ignored)" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/hooks/hooks-codex/src/index.ts:162

          ...workdir !== undefined ? { cwd: workdir } : {},
          signal: opts.signal,
          trailingNewline: false, // Codex writes stdin without a trailing newline.
          // Discard a `hookSpecificOutput` block naming a different event.
          expectedEventName: point,
        }, () => performance.now())
        // Clean plain stdout becomes context only when no structured context
        // exists; nonzero output and raw JSON never leak as prose.
        if (opts.plainStdoutAsContext === true && output.exitCode === 0
          && output.additionalContext === undefined
          && output.stdout.length > 0 && !output.stdout.startsWith('{')) {
          output.additionalContext = output.stdout
        }
        outputs.push(output)
        // Execution and decision mapping remain in each bridge so dialect
        // differences stay explicit at their owning extension point.
        /* jscpd:ignore-start */
        if (output.systemMessage !== undefined) {
          ctx.logger.warn(`hooks-codex: ${point} hook emitted a systemMessage, which is not yet surfaced (ignored)`)
        }
        if (session && opts.turn !== undefined) {
          appendHookResult(session, { turn: opts.turn, point, handlerId, output, stderrSummaryMaxChars, durationMs })
        }
      }
    }
    return mergeHookOutputs(outputs)
  }

  // TODO(hook-continue-false): `merged.stop` is logged but needs a run-level halt mechanism.

  function contextFrom(merged: MergedHookOutcome): UserMessage | undefined {
    if (merged.additionalContext.length === 0) return undefined
    const content: ContentBlock[] = merged.additionalContext.map(text => ({ type: 'text', text }))
    return createUserMessage({ content, source: PLUGIN_SOURCE })
  }

  /** Prepend one context without flattening source fields or other downstream metadata. */

View on GitHub (pinned to b150a551b8)

Solutions

1. Remove systemMessage from the Codex hook output; it is not surfaced.

When it happens

Trigger: Thrown at packages/hooks/hooks-codex/src/index.ts:162 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/401b38f4b79c6e04. Report an issue: GitHub.