Release Workflow
Goldziher/spikard
Release/publish the spikard Rust core crate and CLI end-to-end.
Mechanics of alef's Minijinja template system: which templateenv module to call, how to register a template, inline-template rules, and engine settings.
Install Jinja Codegen
$ npx skills add xberg-io/alef --skill jinja-codegen -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install xberg-io/alef jinja-codegen --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .claude/skills/jinja-codegen && rm -rf skills-srcUse ~/.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/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .claude/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegenType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add xberg-io/alef --skill jinja-codegen -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install xberg-io/alef jinja-codegen --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .agents/skills/jinja-codegen && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .agents/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add xberg-io/alef --skill jinja-codegen -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install xberg-io/alef jinja-codegen --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .cursor/skills/jinja-codegen && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .cursor/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/xberg-io/alef.git --path .ai-rulez/skills/jinja-codegen--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add xberg-io/alef --skill jinja-codegen -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install xberg-io/alef jinja-codegen --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .gemini/skills/jinja-codegen && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .gemini/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install xberg-io/alef jinja-codegenInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add xberg-io/alef --skill jinja-codegen -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .github/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .github/skills/jinja-codegen && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .github/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add xberg-io/alef --skill jinja-codegen -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install xberg-io/alef jinja-codegen --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xberg-io/alef.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.ai-rulez/skills/jinja-codegen .opencode/skills/jinja-codegen && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "jinja-codegen" agent skill from https://github.com/xberg-io/alef/tree/main/.ai-rulez/skills/jinja-codegen into .opencode/skills/jinja-codegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jinja-codegen", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
jinja-codegen- GitHub stars
- 100
- Token cost
- ~735 tokens
- SKILL.md length
- 267 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Mechanics of alef's Minijinja template system: which templateenv module to call, how to register a template, inline-template rules, and engine settings.
- Changing generated-code templates in any backend
- SKILL.md covers Which template_env to call, Registering a template, Engine settings and Inline templates, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- E2e generator module
What it does
Jinja Codegen is an agent skill from xberg-io/alef. Mechanics of alef's Minijinja template system: which templateenv module to call, how to register a template, inline-template rules, and engine settings. Use this skill when adding or changing generated-code templates in any backend, codegen, or e2e generator module.
Its SKILL.md is about 740 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 and End-to-end testing. It works with Rust. The repository describes itself as: Generate fully-typed, lint-clean language bindings for Rust libraries across 16 languages. The licence is MIT.
When your agent uses it
- Changing generated-code templates in any backend
- E2e generator module
Example prompts
- “Use the jinja-codegen skill to mechanic of alef's Minijinja template system: which templateenv module to call, how to register a template…”
- “/jinja-codegen”
What it can do on your machine
Read from SKILL.md and the folder at commit fc04366. 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 rust).
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
Jinja Codegen loads about 735 tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 267 words of instructions outside code blocks.
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 xberg-io/alef at commit fc04366, republished under its MIT licence (© xberg-io). 267 words, ~735 tokens.
Download SKILL.mdSave it as
.claude/skills/jinja-codegen/SKILL.md (or your agent's skills folder).- name
- jinja-codegen
- description
- Mechanics of alef's Minijinja template system: which template_env module to call, how to register a template, inline-template rules, and engine settings. Use this skill when adding or changing generated-code templates in any backend, codegen, or e2e generator module.
- license
- MIT
Jinja Codegen Mechanics
The jinja-templates rule states the invariant: all parameterized generated code goes through
Minijinja templates, never raw format!/push_str/write! assembly. This skill covers the
mechanics of doing that correctly.
Which template_env to call
There is no crate::template_env module. Each backend and generator owns its own
template_env.rs:
src/backends/<lang>/template_env.rs— per-language backend templatessrc/codegen/template_env.rs,src/core/template_env.rs,src/docs/template_env.rs,src/readme/template_env.rs,src/scaffold/template_env.rs,src/e2e/template_env.rs— shared/generator-specific templates
Call the one local to the code you are generating from:
out.push_str(&crate::backends::<lang>::template_env::render("block_name.jinja", minijinja::context! {
key => value,
}));Registering a template
Register in the backend's template_env.rs via include_str!:
("block_name.jinja", include_str!("templates/block_name.jinja")),One template per logical unit (class header, method signature, enum variant, etc.) — do not
create generic line/content passthrough templates to bypass the jinja-templates rule.
Engine settings
Set in each make_env(): trim_blocks = true, lstrip_blocks = true,
keep_trailing_newline = true.
Inline templates
Allowed only for single-line fragments used inside a larger template or join operation. Inline
renders must call .trim_end() or .trim_end_matches('\n') at the call site, because templates
keep their trailing newline — omitting the trim doubles blank lines in the emitted output.
What Rust prepares vs. what the template owns
Rust prepares typed values, identifiers, escaped literals, symbol names, type names, file paths, enum/field metadata, booleans, comma-joined argument lists, and small expression fragments when they are not a logical emitted unit. Templates own generated-code structure, indentation, and multiline blocks.
Static push_str("literal\n") with no interpolation is fine to leave as-is — no template needed
for non-parameterized strings.
Anti-patterns
push_str(&format!(...)),write!/writeln!for interpolated output, or multilineformat!(...)/format!(r#"..."#)that emits target code.format!(...)strings containing\nfor generated code.- Catch-all passthrough templates (e.g.
formatted_line.jinjareceivingcontent => format!(...)) used to route around the templating requirement. - Calling
crate::template_env::render— that module does not exist; use the local one.
© xberg-io, 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 .ai-rulez/skills/jinja-codegen of xberg-io/alef.
Open the folder on GitHubat commit fc04366
Compare with similar skills
Jinja Codegen 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Jinja Codegen this skillxberg-io/alef | 100 | — | ~735 | Automated safety check: Pass | MIT | |
| Release WorkflowGoldziher/spikard | 123 | — | ~909 | Automated safety check: Pass | MIT | |
| Add Full Slicefullstackhero/dotnet-starter-kit | 6.8k | — | ~783 | Automated safety check: Pass | MIT | |
| Rust Hygiene Audittsz-org/tsz | 577 | — | ~1.5k | Automated safety check: Pass | Apache-2.0 | |
| New CrateDevolutions/IronRDP | 3.2k | — | ~236 | Automated safety check: Pass | Apache-2.0 | |
| Grindatgreen/Whistler | 101 | — | ~2.4k | Automated safety check: Pass | MIT |
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Categories
Questions about Jinja Codegen
What does Jinja Codegen do?
Mechanics of alef's Minijinja template system: which templateenv module to call, how to register a template, inline-template rules, and engine settings. Jinja Codegen is an agent skill from xberg-io/alef. Mechanics of alef's Minijinja template system: which templateenv module to call, how to register a template, inline-template rules, and engine settings.
When should I use Jinja Codegen?
Jinja Codegen fits situations like: changing generated-code templates in any backend; E2e generator module.
How do I install Jinja Codegen in Claude Code?
Run `npx skills add xberg-io/alef --skill jinja-codegen -a claude-code`. Or copy the skill folder (.ai-rulez/skills/jinja-codegen in xberg-io/alef) into .claude/skills/jinja-codegen in your project. Claude Code loads it when a task matches its description.
How do I install Jinja Codegen in Codex?
Run `npx skills add xberg-io/alef --skill jinja-codegen -a codex`. Or copy the skill folder (.ai-rulez/skills/jinja-codegen in xberg-io/alef) into .agents/skills/jinja-codegen in your project. Codex loads it when a task matches its description.
Can I use Jinja Codegen 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 xberg-io/alef --skill jinja-codegen -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jinja-codegen, .gemini/skills/jinja-codegen, .github/skills/jinja-codegen and .opencode/skills/jinja-codegen in your project.
What does Jinja Codegen need to run?
SKILL.md names no scripts, command-line tools or credentials: Jinja Codegen is instructions for the agent only.
Does Jinja Codegen 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 Jinja Codegen 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 Jinja Codegen use?
Jinja Codegen is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Jinja Codegen use?
About 735 tokens (SKILL.md is roughly 2.9k 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 Jinja Codegen?
Skills that share tags, products or a category with Jinja Codegen: Release Workflow (Goldziher/spikard, 123 stars), Add Full Slice (fullstackhero/dotnet-starter-kit, 6.8k stars), Rust Hygiene Audit (tsz-org/tsz, 577 stars) and New Crate (Devolutions/IronRDP, 3.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Jinja Codegen?
xberg-io (a GitHub organization) maintains it in xberg-io/alef, which has 100 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 8, 2026.
Source: xberg-io/alef on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.