binary-hardening SKILL.md skillA
binary-hardening from outlinedriven/outline-driven-development is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add outlinedriven/outline-driven-development/binary-hardening@git:20260905.fd53e99Pins git:20260905.fd53e99 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- outlinedriven/outline-driven-development
- Path
.devin/skills/binary-hardening/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260905.fd53e99, committed Sep 5, 2026
- Size
- 7,437 bytes
- Repository stars
- 55
- License
- Apache-2.0
Use when enabling RELRO, PIE, stack canaries, FORTIFY_SOURCE, CET, CFI, or seccomp filters, or checking a binary with checksec. Not for runtime sanitizer builds: use sanitizers.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Binary hardening ## Contract | Field | Bound contract | |---|---| | Trigger | Hardening an ELF binary or its build: checksec analysis, RELRO, PIE, stack canaries, FORTIFY_SOURCE, CET and shadow stack, Clang CFI, AArch64 BTI and PAC, MTE, or seccomp syscall filtering. | | Authority | Read-only. The skill emits flags, commands, and analysis; it writes no files. Nothing to roll back. No remote mutation. | | Side effect | Hardening flag sets, verification commands, and a protection report per binary. | | Done | The binary's current mitigations are measured, the missing ones have concrete flags, and each flag is confirmed supported by the project's compiler and libc. | ## Inputs 1. Binary or build (required): the ELF to check, or the build to harden. 2. Toolchain (required): `gcc --version` or `clang --version`, `ld --version`, and `ldd --version` for the libc. Grounded channels: GCC 16.x, Clang 23.1.0, binutils 2.47, glibc 2.44. 3. Target platforms (optional): x86-64, AArch64, or both. 4. Threat scope (optional): which mitigations the deployment actually needs. ## Procedure 1. Measure the binary first: ```bash checksec --file=./mybinary checksec --dir=/usr/bin ``` …
Read the whole file at its exact version.
How to install
mdr add outlinedriven/outline-driven-development/binary-hardening@sha256:98892982d025031fThe line at the top of this page pins the label git:20260905.fd53e99, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_2qcsybi6sk2jbrxj)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 5, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7437 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
outlinedriven/outline-driven-development · 55 stars · license Apache-2.0 · pushed 2026-09-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2qcsybi6sk2jbrxj GET https://markdownregistry.com/api/v1/resolve?ref=outlinedriven/outline-driven-development/binary-hardening GET https://markdownregistry.com/api/v1/blob/98892982d025031f8d9bd74c4577e84dc17391c04023de550e31bc689ded7c31
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.