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Agent skill

Code Generation And Backends

by mohitmishra786 in mohitmishra786/low-level-dev-skills

Code generation and backends skill for LLVM targets. An agent skill from mohitmishra786/low-level-dev-skills.

MITAuto-check passedDevelopment

Install Code Generation And Backends

skills CLI
$ npx skills add mohitmishra786/low-level-dev-skills --skill code-generation-and-backends -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitmishra786/low-level-dev-skills code-generation-and-backends --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/compiler-internals/code-generation-and-backends .claude/skills/code-generation-and-backends && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
code-generation-and-backends
GitHub stars
253
Token cost
~797 tokens
SKILL.md length
242 words
Files
1
Skills in repo
138
Repo updated
First seen
Licence
MIT

At a glance

Code generation and backends skill for LLVM targets. An agent skill from mohitmishra786/low-level-dev-skills.

  • Works in 7 steps: Backend pipeline (LLVM) → llc usage → TableGen patterns (conceptual) → …
  • Explaining instruction selection
  • SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Code Generation And Backends is an agent skill from mohitmishra786/low-level-dev-skills. Code generation and backends skill for LLVM targets. Use when explaining instruction selection, DAG legalization, target lowering, or adding backend support overview. Activates on queries about LLVM backend, instruction selection, target lowering, llc, TableGen, or codegen pipeline.

Its SKILL.md is about 800 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Project scaffolding. The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.

When your agent uses it

  • Explaining instruction selection
  • DAG legalization
  • Target lowering
  • Adding backend support overview

Example prompts

  • “/code-generation-and-backends”

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Backend pipeline (LLVM)
  2. llc usage
  3. TableGen patterns (conceptual)
  4. Calling convention lowering
  5. Target triple
  6. Adding a target (outline)
  7. Agent usage

What it can do on your machine

Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash and tablegen).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Code Generation And Backends loads about 797 tokens when it runs. Until then it costs about 78 tokens; SKILL.md has 242 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~78
When it runs · the whole SKILL.md, loaded when a task matches
~797

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 242 words, ~797 tokens.

Download SKILL.mdSave it as .claude/skills/code-generation-and-backends/SKILL.md (or your agent's skills folder).
name
code-generation-and-backends
description
Code generation and backends skill for LLVM targets. Use when explaining instruction selection, DAG legalization, target lowering, or adding backend support overview. Activates on queries about LLVM backend, instruction selection, target lowering, llc, TableGen, or codegen pipeline.

Code Generation and Backends

Purpose

Overview LLVM (and general compiler) backend code generation: IR legalization, SelectionDAG instruction selection, register allocation, assembly emission, and what adding a new target entails — complementing IR skills and skills/compiler-internals/llvm-passes.

When to Use

  • Reading llc output for a specific target
  • Understanding why IR type legalizer inserted extra ops
  • Evaluating porting compiler to new architecture (high level)
  • Debugging wrong code at asm layer (not IR)

Workflow

1. Backend pipeline (LLVM)
LLVM IR per function
├── IR legalizer (types/ops target supports)
├── SelectionDAGBuilder
├── LegalizeTypes / LegalizeOps
├── Instruction selection (pattern match TableGen)
├── Scheduling (pre-RA)
├── Register allocation
├── Prolog/epilog insertion
└── AsmPrinter → .s object
2. llc usage
bash
clang -c -emit-llvm -O2 -o foo.bc foo.c
llc -march=aarch64 -O2 foo.bc -o foo.s
llc -march=riscv64 -O2 foo.bc -o foo-rv.s
3. TableGen patterns (conceptual)
tablegen
def ADD32rr : Pat<(add i32 GPR:$a, GPR:$b),
                  (ADD32rr GPR:$a, GPR:$b)>;

Patterns map DAG nodes to machine instructions. .td files define registers, calling conv, instr formats.

4. Calling convention lowering

ABI rules become CC_AArch64 / CC_X86_64 in TableGen — ties to skills/computer-architecture/abi-and-calling-conventions.

5. Target triple
bash
clang --target=arm-none-eabi -c -O2 foo.c
llc -mtriple=thumbv7em-none-eabi foo.bc

Mismatch between triple and CPU features (+neon, +crc) causes legalizer failures or suboptimal code.

6. Adding a target (outline)
  1. Define register classes and instr formats in TableGen
  2. Implement lowering hooks (TargetLowering)
  3. AsmPrinter and MC layer for relocations
  4. Builtin calling convention and ELF/COFF object writer

Full port is large — reuse existing backend closest to arch.

7. Agent usage
/code-generation-and-backends Trace how this IR add becomes AArch64 ADD instruction

Common Problems

SymptomCauseFix
Cannot select fatalUnsupported IR op on targetLegalize or expand op
Wrong soft-floatABI mismatchSet -mfloat-abi / triple
Huge stack frameMany spills post-RAIR-level pressure reduction
llc vs clang differDifferent targets passedSame -mtriple
TableGen build failSyntax in .tdllvm-tblgen error line
  • skills/compiler-internals/llvm-ir-and-passes — pre-codegen IR
  • skills/compiler-internals/compiler-optimizations-deep — RA intuition
  • skills/compilers/cross-gcc — embedded triples
  • skills/computer-architecture/abi-and-calling-conventions — call lowering
  • skills/low-level-programming/assembly-arm — read emitted asm

© mohitmishra786, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/compiler-internals/code-generation-and-backends of mohitmishra786/low-level-dev-skills.

Open the folder on GitHubat commit bdc5847

Compare with similar skills

Code Generation And Backends next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Code Generation And Backends compared with similar skills
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Code Generation And Backends this skillmohitmishra786/low-level-dev-skills253—~797Automated safety check: PassMIT
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PonytailDavidObando/gsharp5648 repos~1.7kAutomated safety check: PassMIT
Run Nx Generatornrwl/nx29k2 repos~592Automated safety check: NotesMIT
Conductor Setupgemini-cli-extensions/conductor3.8k—~4.2kAutomated safety check: PassApache-2.0
Mirage VFS Adapter Authoringstrukto-ai/mirage3.7k—~2.5kAutomated safety check: PassApache-2.0

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Categories

Questions about Code Generation And Backends

What does Code Generation And Backends do?

Code generation and backends skill for LLVM targets. An agent skill from mohitmishra786/low-level-dev-skills. Code Generation And Backends is an agent skill from mohitmishra786/low-level-dev-skills. Code generation and backends skill for LLVM targets.

When should I use Code Generation And Backends?

Code Generation And Backends fits situations like: explaining instruction selection; DAG legalization; target lowering; adding backend support overview.

How do I install Code Generation And Backends in Claude Code?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill code-generation-and-backends -a claude-code`. Or copy the skill folder (skills/compiler-internals/code-generation-and-backends in mohitmishra786/low-level-dev-skills) into .claude/skills/code-generation-and-backends in your project. Claude Code loads it when a task matches its description.

How do I install Code Generation And Backends in Codex?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill code-generation-and-backends -a codex`. Or copy the skill folder (skills/compiler-internals/code-generation-and-backends in mohitmishra786/low-level-dev-skills) into .agents/skills/code-generation-and-backends in your project. Codex loads it when a task matches its description.

Can I use Code Generation And Backends in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill code-generation-and-backends -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-generation-and-backends, .gemini/skills/code-generation-and-backends, .github/skills/code-generation-and-backends and .opencode/skills/code-generation-and-backends in your project.

What does Code Generation And Backends need to run?

SKILL.md names no scripts, command-line tools or credentials: Code Generation And Backends is instructions for the agent only.

Does Code Generation And Backends access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Code Generation And Backends safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Code Generation And Backends use?

Code Generation And Backends is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Code Generation And Backends use?

About 797 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Code Generation And Backends?

Skills that share tags, products or a category with Code Generation And Backends: Nx Generate (nomcopter/react-mosaic, 4.8k stars), Ponytail (DavidObando/gsharp, 564 stars), Run Nx Generator (nrwl/nx, 29k stars) and Conductor Setup (gemini-cli-extensions/conductor, 3.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Code Generation And Backends?

mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 253 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.

Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.