Build instructions for Vala projects using xmake, a tool that automates compiling and packaging software. Vala is a programming language that is converted to C before being compiled into native programs or libraries.

Use it to build Vala executables, static libraries, and shared libraries with xmake, including libraries that export C headers and Vala interface files.

It clarifies the settings needed for xmake to handle Vala source files, including the GLib runtime and Vala package declarations.

xmake-vala — Skill for Claude Code by xmake-io

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add xmake-io/xmake-skills --skill xmake-vala

Clone the repo

git clone --depth 1 https://github.com/xmake-io/xmake-skills

Made for: Claude Code.

Or install xmake-skills, the plugin that ships this one along with the rest of its 58 skills.

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/xmake-io/xmake-skills/xmake-vala/github.svg)](https://agentmods.dev/skills/xmake-io/xmake-skills/xmake-vala)

Your own site

<a href="https://agentmods.dev/skills/xmake-io/xmake-skills/xmake-vala"><img src="https://agentmods.dev/badge/skills/xmake-io/xmake-skills/xmake-vala/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/xmake-io/xmake-skills/xmake-vala"><img src="https://agentmods.dev/badge/skills/xmake-io/xmake-skills/xmake-vala.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 822 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	$0.00065	$0.00822
Opus 5	$0.00032	$0.00411
Sonnet 5	$0.00013	$0.00164
Haiku 4.5	$0.00006	$0.00082

Measured 12d ago against content hash 922f13b029a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

xmake-vala 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 12d 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.

skills/languages/xmake-vala/SKILL.md · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Building Vala with Xmake

Vala compiles to C (via valac), then to native code. Xmake handles both steps via the vala rule. Supported since v2.5.7 (binaries) / v2.5.8 (libraries).

1. Minimal console program

add_rules("mode.debug", "mode.release")
add_requires("glib")                                 -- mandatory

target("hello")
    set_kind("binary")
    add_rules("vala")                                -- required
    add_files("src/*.vala")
    add_packages("glib")
    add_values("vala.packages", "glib-2.0", "gobject-2.0")

Three things every Vala target needs:

add_rules("vala") — tells xmake this is a Vala target.
add_requires("glib") + add_packages("glib") — Vala's runtime.
add_values("vala.packages", ...) — the VAPI package names that valac should import.

2. Static library with exported API

target("mymath")
    set_kind("static")
    add_rules("vala")
    add_files("src/*.vala")
    add_packages("glib")
    add_values("vala.packages", "glib-2.0", "gobject-2.0")
    add_values("vala.header", "mymath.h")             -- exported C header
    add_values("vala.vapi",   "mymath-1.0.vapi")      -- exported VAPI

Consumers in C can #include "mymath.h"; consumers in Vala import mymath-1.0.vapi.

3. Shared library

target("mymath")
    set_kind("shared")
    add_rules("vala")
    add_files("src/*.vala")
    add_packages("glib")
    add_values("vala.packages", "glib-2.0", "gobject-2.0")
    add_values("vala.header", "mymath.h")
    add_values("vala.vapi",   "mymath-1.0.vapi")

4. Consuming a Vala library in C

target("app")
    set_kind("binary")
    add_files("src/main.c")
    add_deps("mymath")
    add_packages("glib")

The exported header and VAPI flow through add_deps automatically.

Pitfalls

Forgot add_rules("vala"). .vala files are treated as unknown — build fails. Always add the rule.
Missing glib dep. Vala's runtime is glib. Add it as a package even for "hello world".
vala.packages vs add_packages. These are different axes: vala.packages is what valac imports (VAPI names), add_packages is what xmake links. You usually need both for glib.
Version in the VAPI name. glib-2.0, not glib. Check pkg-config --list-all for the exact names.
Cross-compile. Vala's two-step build (Vala → C → native) makes cross-compile trickier than pure C. Works but requires the cross toolchain to also have glib headers.

Read the full file on GitHub · 82 lines

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.

12d ago First seen · 82 lines · 65 tokens per session scan A 922f13b029a3

Subscribe to this mod's changes

xmake-vala is a skill published in the GitHub repository xmake-io/xmake-skills (24 stars, last pushed 19d ago), licensed Apache-2.0. It adds 65 tokens to every session and 822 once invoked, about $0.0003 per session on Opus 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.

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xmake-vala