# Verify Output Readback

> After write_file, re-read the deliverable (or ls + hexdump/line-print) and re-check the last format clauses before finishing.

- Skill: `ashutoshsinghpr7/verify-output-readback` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ashutoshsinghpr7/verify-output-readback`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ashutoshsinghpr7/verify-output-readback/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT
- Author: ashutoshsinghpr7 (https://skillmd.com/u/ashutoshsinghpr7)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/ashutoshsinghpr7/verify-output-readback

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# Verify Deliverable by Re-Reading

## What passing agents did

- After `write_file`, always re-read the deliverable (or `ls` + hexdump /
  line-print) to confirm exact content, line count, and absence of trailing
  blank lines before finishing.
- Re-checked the last format clauses (header? separator? case? final
  newline?) against the spec one more time.
- A `find-secret` run verified the payload was exactly `data.log` (8 bytes).

## When to use

Any task graded by exact-match output comparison — the readback is the
difference between a byte-exact pass and a silent 0.0.