What is ghidra-headless?

A guide for running Ghidra's command-line analyzer on C166 and C167 compiled binaries. Ghidra is a reverse-engineering tool used to inspect programs without their source code.

Building safe headless Ghidra commands, analyzing C166/C167 firmware, running requested scripts, and reporting processed files, warnings, timeouts, and saved changes.

It reduces mistakes when importing firmware or processing existing analysis projects, especially when selecting the correct processor definition. It also emphasizes read-only inspection and checking logs and exit results.

How keyhana/c166-ghidra-module configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to keyhana/c166-ghidra-module. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/keyhana/c166-ghidra-module/main/.agents/skills/ghidra-headless/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/keyhana/c166-ghidra-module

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/keyhana/c166-ghidra-module/ghidra-headless/github.svg)](https://agentmods.dev/skills/keyhana/c166-ghidra-module/ghidra-headless)

Your own site

<a href="https://agentmods.dev/skills/keyhana/c166-ghidra-module/ghidra-headless"><img src="https://agentmods.dev/badge/skills/keyhana/c166-ghidra-module/ghidra-headless/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/keyhana/c166-ghidra-module/ghidra-headless"><img src="https://agentmods.dev/badge/skills/keyhana/c166-ghidra-module/ghidra-headless.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 820 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00058	$0.00820
Opus 5.5	$0.00023	$0.00328
Sonnet 5.5	$0.00012	$0.00164
Haiku 4.5	$0.00006	$0.00082

Measured 2mo ago against content hash 492aca4512fa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ghidra-headless scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/ghidra-headless/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ghidra Headless Analyzer

Build smallest safe ghidra-analyzeHeadless command for requested operation.

Workflow

Confirm binary with command -v ghidra-analyzeHeadless.
Choose exactly one mode: -import <path> for new binaries; -process [pattern] for project programs. Omit both only for program-independent scripts.
Choose local <project-dir> <project-name>[/folder] or existing ghidra://... repository.
For raw firmware, select repository definitions explicitly:
- C167CR: -loader BinaryLoader -processor C166:LE:16:default -cspec tasking
- C167CS: -loader BinaryLoader -processor C166:CS:LE:16:default -cspec tasking
- Add -loader-baseAddr <hex-address> when known.
Add only requested scripts, recursion, timeout, logs, read-only behavior, overwrite, or CPU limit.
Quote paths containing spaces. Single-quote -process wildcards so shell does not expand them.
Show complete command before execution and state what it may change.
Check exit status and logs. Report processed files, warnings, timeouts, and saved/discarded changes.

Safety

Prefer -readOnly when inspecting existing projects.
Never add -overwrite, -deleteProject, -commit, -okToDelete, or deletion disposition implicitly.
Before overwrite, identify files at risk. Before commit, confirm repository and comment.
Before -okToDelete, warn that process-mode deletion is permanent and can remove every version.
Never put passwords or private-key passphrases in command arguments.

Patterns

ghidra-analyzeHeadless <project-dir> <project-name> \
  -import <firmware.bin> \
  -loader BinaryLoader -loader-baseAddr <hex-address> \
  -processor C166:LE:16:default -cspec tasking

ghidra-analyzeHeadless <project-dir> <project-name> \
  -import <firmware.bin> \
  -scriptPath <repo>/ghidra_scripts \
  -preScript <ScriptName.java> [args...] \
  -loader BinaryLoader -processor C166:LE:16:default -cspec tasking

ghidra-analyzeHeadless <project-dir> <project-name> \
  -process '<pattern>' -recursive -readOnly \
  -postScript <ScriptName.java> [args...]

Read the full file on GitHub · 68 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

references/headless-analyzer.md 2.7 KB

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 68 lines · 58 tokens per session scan A 492aca4512fa

Subscribe to this mod's changes

ghidra-headless is a skill published in the GitHub repository keyhana/c166-ghidra-module (61 stars, last pushed 2d ago), licensed MIT. It adds 58 tokens to every session and 820 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Debugging

ghidra-headless next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ghidra-headlesskeyhana/c166-ghidra-module	Skill	61	2d ago	MIT	A	58	Claude Code, Codex
systematic-debuggingopen-metadata/OpenMetadata	Skill	16k	today	Apache-2.0	A	37	Claude Code
log-error-digestzebbern/claude-code-guide	Skill	4.7k	yesterday	MIT	A	71	Claude Code, Codex
cwv-optimizeradobe/skills	Skill	321	today	Apache-2.0	A	112	Claude Code
ci-fixersipyourdrink-ltd/bernstein	Skill	1.2k	today	Apache-2.0	A	15	Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skills	Skill	2.0k	yesterday	MIT	A	36	Claude Code, Codex
diagnosing-missing-recordingsPostHog/posthog	Skill	41k	today	none	A	76	Claude Code, Codex

c166-ghidra-module: Skill for Claude Code