Intel HEX & S-record Image Audit

Recomputes every checksum in a .hex or .srec image and maps every address it writes, before the image reaches the programmer.

Install

npx @readystack/hex-image-audit file

Node 18+. The same 17 rules as the VS Code extension, from a terminal or CI.

Free

• Audit one firmware image against all 17 checks — every Intel HEX and Motorola S-record checksum recomputed byte by byte, every byte-count field, every overlap, gap, page-straddling block and entry point — reported at the exact line, in the editor or in the browser, with no key and nothing truncated.
• --rules lists every rule

With a licence ($29 once)

• Sweep every image in the build folder in one pass and keep the dated Markdown audit report as a file you own — the per-image release evidence a technical documentation file is made of. A different axis: scope (one file to the whole folder) and ownership (a report you keep), never a limit on the checks themselves.

@readystack/hex-image-audit --dir ./templates --report html --out report.html

Freelance embedded software engineers average $104 an hour and firmware consultants $105 (contractrates.fyi, crowdsourced rates, June 2026). One hour of one of them re-reading one image costs more than this licence.

Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "hex-image-audit": { "command": "npx", "args": ["-y", "@readystack/hex-image-audit", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

Use in CI

- name: Intel HEX & S-record Image Audit
  run: npx -y @readystack/hex-image-audit --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/hex-image-audit --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence