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Azldev Comp Toml

microsoft/azldev-comp-toml

Read this before authoring, editing, or reviewing a *.comp.toml file; do not work from memory. Explains the azldev component definition format and review workflow, covering component structure, spec sources, build config, release calculation, render options, file organization, overlay hygiene, stale files, disabled tests, and testing verification. Triggers include comp.toml, component config, review component, component hygiene, spec source, upstream-distro, build defines, release calculation, includes.

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Install

one command, takes just this skill from the repository
npx skills add https://github.com/microsoft/azurelinux --skill azldev-comp-toml

The instruction itself

9 sections, as written by the author

Component definition files (*.comp.toml)

A component definition tells azldev where a package's spec comes from and how to

customize it for your distro. Every component lives under [components.<name>].

Get the authoritative, always-current field list from the schema:

azldev config generate-schema

Structure

A bare entry inherits everything from your distro's defaults — most upstream packages

need nothing more:

[components.curl]

Add sub-tables only for what you change. The fields you will reach for most:

| Field | Purpose |

| --- | --- |

| spec | where the spec comes from (see below) |

| overlays / overlay-files | targeted spec/source edits (see the azldev-overlays skill) |

| build.defines / build.with / build.without | RPM macro and bcond build tweaks |

| release.calculation | how the Release tag is managed |

| render.skip-file-filter | rendering edge-case escape hatch |

Spec source

The spec field selects where the spec is fetched from. When omitted, the component

inherits the distro default (normally an upstream import).

# Upstream import (the usual case) — inherits the distro's upstream version
[components.curl]

# Upstream, but pinned to a specific upstream distro/version
[components.curl]
spec = { type = "upstream", upstream-distro = { name = "fedora", version = "rawhide" } }

# Upstream package whose name differs from the component name
[components.mydistro-rpm-config]
spec = { type = "upstream", upstream-name = "redhat-rpm-config" }

# Local spec that lives in your repo (not imported from an upstream distro)
[components.mydistro-release]
spec = { type = "local", path = "mydistro-release.spec" }

Build configuration

[components.mypackage.build]
defines = { rhel = "11" }      # override RPM macros
with = ["feature_x"]            # enable %bcond_with conditionals
without = ["plugin_rhsm"]       # disable %bcond_with conditionals

Release calculation

release.calculation controls the Release: tag. There are four modes:

  • auto (default) — auto-detect whether the spec uses %autorelease or a static

release and handle it accordingly. Correct for most packages.

  • autorelease — force %autorelease handling (use when auto-detection misreads a

spec that wraps %autorelease in a conditional).

  • static — force static-integer handling and bump the integer on render (the

inverse of autorelease).

  • manual — you own the Release: value. Use this only when render fails with a

"non-standard Release tag" error. **A manual component is not bumped by the

render/commit/amend cycle, so increment its release yourself in the same change**

(see the azldev-update-component skill).

[components.mypackage.release]
calculation = "manual"

Render configuration

render.skip-file-filter = true keeps all source and patch files during render.

azldev normally prunes files not referenced by the rendered spec; set this only for

the rare spec whose Source/Patch filenames use macros the filter cannot expand.

File organization

  • Inline — put simple, customization-free components directly in a shared config

file (e.g. [components.jq]).

  • Dedicated — give a component its own <name>/<name>.comp.toml once it needs

overlays, build config, or a local spec. Rule of thumb: anything more than

[components.<name>] earns a dedicated file.

  • A parent config picks up dedicated files through an includes glob, for example

includes = ["**/*.comp.toml"].

Review checklist

Start with azldev comp list -p <name> -q -O json, then use

azldev comp query -p <name> -q -O json when the review needs parsed spec details.

For a change review, focus on the diff while checking enough surrounding context to

ensure it fits the component and repository conventions.

  • Organization: The component follows the repository's inline-versus-dedicated-file

convention; its name matches upstream or sets spec.upstream-name; no stale or

orphaned component files remain.

  • Spec source: The default upstream source is preferred. Pins explain why they are

needed, and local specs are used only when overlays cannot express the change.

  • Overlays: Every overlay explains why it exists. Prefer structured overlay types

over regex; scope unavoidable spec-search-replace expressions by section and, when

applicable, package, and use TOML literal strings. spec-search-replace cannot span

lines. Remove overlays that upstream has made unnecessary. See the azldev-overlays skill.

  • Build config: Defines and bcond overrides are necessary and correspond to the

spec. If build.check.skip = true, require a specific build.check.skip_reason and

verify that fixing the tests is impractical; skipped %check is a last resort.

  • Release mode: auto is the default. Force autorelease or static only when

auto-detection is wrong. Use manual only for a non-standard release tag, and verify

the component increments its release itself.

  • Generated state: The lock matches the final component inputs, and rendered output

contains the intended changes without unrelated drift.

  • Testing: Changes that can affect RPM output were built and smoke-tested in a mock

chroot. Organization, comment, or documentation-only metadata edits do not require a

rebuild when the resolved component inputs are unchanged.

Report findings by severity: errors for correctness or required-policy violations,

warnings for maintainability risks, and info for optional improvements. Prefer small,

actionable fixes over unrelated cleanup.

Documenting changes

Add a TOML comment explaining *why* a non-obvious field is set (a version pin, a

workaround), and link the upstream commit or bug when the change is based on one. For

overlays, use the overlay metadata table instead (see the azldev-overlays skill).

Generated by azldev docs agent; do not hand-edit. Generated for azldev version v0.1.0.

How to use it

Copy the folder

Take microsoft/azldev-comp-toml from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.