Configuring Horizon
coollabsio/coolify
A skill your agent uses whenever the user mentions Horizon by name in a Laravel context.
Choose required fields, defaults, and construction APIs when changing config or options types.
Install Defaults And Breakage
$ npx skills add celeriant/celeriant-db --skill defaults-and-breakage -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install celeriant/celeriant-db defaults-and-breakage --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/celeriant/celeriant-db.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .claude/skills/defaults-and-breakage && 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 "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .claude/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakageType 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 celeriant/celeriant-db --skill defaults-and-breakage -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install celeriant/celeriant-db defaults-and-breakage --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/celeriant/celeriant-db.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .agents/skills/defaults-and-breakage && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .agents/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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 celeriant/celeriant-db --skill defaults-and-breakage -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install celeriant/celeriant-db defaults-and-breakage --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/celeriant/celeriant-db.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .cursor/skills/defaults-and-breakage && 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 "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .cursor/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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/celeriant/celeriant-db.git --path .claude/skills/defaults-and-breakage--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 celeriant/celeriant-db --skill defaults-and-breakage -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install celeriant/celeriant-db defaults-and-breakage --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/celeriant/celeriant-db.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .gemini/skills/defaults-and-breakage && 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 "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .gemini/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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 celeriant/celeriant-db defaults-and-breakageInstalls 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 celeriant/celeriant-db --skill defaults-and-breakage -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/celeriant/celeriant-db.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .github/skills/defaults-and-breakage && 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 "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .github/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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 celeriant/celeriant-db --skill defaults-and-breakage -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install celeriant/celeriant-db defaults-and-breakage --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/celeriant/celeriant-db.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/defaults-and-breakage .opencode/skills/defaults-and-breakage && 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 "defaults-and-breakage" agent skill from https://github.com/celeriant/celeriant-db/tree/main/.claude/skills/defaults-and-breakage into .opencode/skills/defaults-and-breakage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "defaults-and-breakage", 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
defaults-and-breakage- GitHub stars
- 114
- Token cost
- ~441 tokens
- SKILL.md length
- 202 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Choose required fields, defaults, and construction APIs when changing config or options types.
- Backend & APIs work in your project
- SKILL.md covers Classify each field, Control construction and Migrate callers
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Defaults And Breakage is an agent skill from celeriant/celeriant-db. Choose required fields, defaults, and construction APIs when changing config or options types.
Its SKILL.md is about 440 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 Backend & APIs. The repository describes itself as: Fast, distributed per-aggregate event log with strict ordering and optimistic concurrency control. The licence is Apache-2.0.
When your agent uses it
- Backend & APIs work in your project
Example prompts
- “/defaults-and-breakage”
What it can do on your machine
Read from SKILL.md and the folder at commit d071a6d. 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.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
doc.rust-lang.org
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
Defaults And Breakage loads about 441 tokens when it runs. Until then it costs about 29 tokens; SKILL.md has 202 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 celeriant/celeriant-db at commit d071a6d, republished under its Apache-2.0 licence (© celeriant). 202 words, ~441 tokens.
Download SKILL.mdSave it as
.claude/skills/defaults-and-breakage/SKILL.md (or your agent's skills folder).- name
- defaults-and-breakage
- description
- Choose required fields, defaults, and construction APIs when changing config or options types.
Defaults and breakage
Classify each field
- Default a field only when omission gives correct behavior.
- Require an explicit value when correctness depends on the caller's domain.
- Put required values in
new(...); expose optional values throughwith_*(self, ...). - Implement
Defaultonly when the complete type has a valid default configuration. - Keep required choices out of defaulted builders. Adding an optional setter does not force callers to choose.
Control construction
- Prefer private fields for config types that must evolve or enforce invariants.
- Use
#[non_exhaustive]for extensible public field bags. Provide a constructor. - Keep fields private when assignments require validation;
#[non_exhaustive]still permits public-field assignment. - Treat adding a field to an exhaustive all-public struct as breaking, even when it implements
Default. - Treat adding the first private field, privatizing a public field, or adding
#[non_exhaustive]to an existing all-public struct as breaking. - Check trait and behavior compatibility even when private fields permit a structural change.
Consult Cargo's compatibility rules for release classification.
Migrate callers
- Inspect construction sites before changing the API.
- Add a required constructor argument when every caller must make a new decision.
- Preserve defaults when callers can safely omit the new field.
- Explain the required decision in migration notes.
- Separate compatibility changes from internal refactoring.
© celeriant, Apache-2.0. 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 .claude/skills/defaults-and-breakage of celeriant/celeriant-db.
Open the folder on GitHubat commit d071a6d
Compare with similar skills
Defaults And Breakage 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 |
|---|---|---|---|---|---|---|
| Defaults And Breakage this skillceleriant/celeriant-db | 114 | — | ~441 | Automated safety check: Pass | Apache-2.0 | |
| Configuring Horizoncoollabsio/coolify | 63k | 4 repos | ~898 | Automated safety check: Pass | MIT | |
| Nestjs Best Practicesrolling-scopes/rsschool-app | 10k | 6 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Sub2API AdminWei-Shaw/sub2api | 43k | 1 repos | ~717 | Automated safety check: Pass | LGPL-3.0 | |
| Firecrawl Build Onboardingfirecrawl/firecrawl | 190k | 1 repos | ~1.4k | Automated safety check: Notes | ISC | |
| Obsidian BasesAtmosphere/atmosphere | 3.8k | 22 repos | ~3.2k | Automated safety check: Pass | Apache-2.0 |
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Manages a Sub2API deployment from the command line: accounts, redeem and invitation codes, groups, proxies, imports, exports and raw admin API calls.
Firecrawl Build Onboarding
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Gets Firecrawl working in a project: signs you in through the browser, saves FIRECRAWL_API_KEY to .env and picks the first SDK or REST path.
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Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries.
Fortify Development
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Related
Categories
Questions about Defaults And Breakage
What does Defaults And Breakage do?
Choose required fields, defaults, and construction APIs when changing config or options types. Defaults And Breakage is an agent skill from celeriant/celeriant-db. Choose required fields, defaults, and construction APIs when changing config or options types.
When should I use Defaults And Breakage?
Defaults And Breakage fits situations like: backend & APIs work in your project.
How do I install Defaults And Breakage in Claude Code?
Run `npx skills add celeriant/celeriant-db --skill defaults-and-breakage -a claude-code`. Or copy the skill folder (.claude/skills/defaults-and-breakage in celeriant/celeriant-db) into .claude/skills/defaults-and-breakage in your project. Claude Code loads it when a task matches its description.
How do I install Defaults And Breakage in Codex?
Run `npx skills add celeriant/celeriant-db --skill defaults-and-breakage -a codex`. Or copy the skill folder (.claude/skills/defaults-and-breakage in celeriant/celeriant-db) into .agents/skills/defaults-and-breakage in your project. Codex loads it when a task matches its description.
Can I use Defaults And Breakage 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 celeriant/celeriant-db --skill defaults-and-breakage -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/defaults-and-breakage, .gemini/skills/defaults-and-breakage, .github/skills/defaults-and-breakage and .opencode/skills/defaults-and-breakage in your project.
What does Defaults And Breakage need to run?
SKILL.md names no scripts, command-line tools or credentials: Defaults And Breakage is instructions for the agent only.
Does Defaults And Breakage access the network?
SKILL.md names 1 domain. As links in the text: doc.rust-lang.org. This is read from the text; nothing was executed.
Is Defaults And Breakage 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 Defaults And Breakage use?
Defaults And Breakage is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Defaults And Breakage use?
About 441 tokens (SKILL.md is roughly 1.8k 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 Defaults And Breakage?
Skills that share tags, products or a category with Defaults And Breakage: Configuring Horizon (coollabsio/coolify, 63k stars), Nestjs Best Practices (rolling-scopes/rsschool-app, 10k stars), Sub2API Admin (Wei-Shaw/sub2api, 43k stars) and Firecrawl Build Onboarding (firecrawl/firecrawl, 190k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Defaults And Breakage?
celeriant (a GitHub organization) maintains it in celeriant/celeriant-db, which has 114 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on September 28, 2026.
Source: celeriant/celeriant-db on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.