add-dependency
Add a dependency to a Lean project's lakefile. Use when adding requires, dependencies, or imports to a project.
Best use case
add-dependency is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Add a dependency to a Lean project's lakefile. Use when adding requires, dependencies, or imports to a project.
Teams using add-dependency should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/add-dependency/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How add-dependency Compares
| Feature / Agent | add-dependency | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Add a dependency to a Lean project's lakefile. Use when adding requires, dependencies, or imports to a project.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Add Dependency Add dependencies to a Lean project with tier validation. ## Quick Start 1. Identify the project and dependency 2. Check tier ordering (can't depend on higher tiers) 3. Find the dependency's current version tag 4. Update lakefile.lean with require statement 5. Run `lake update` and `lake build` ## Dependency Tiers Projects should only depend on projects in the same or lower tiers. | Tier | Projects | |------|----------| | 0 | crucible, staple, cellar, assimptor, raster | | 1 | herald, trellis, collimator, protolean, scribe, chronicle, terminus, fugue, linalg, chronos, measures, rune, tincture, wisp, chisel, ledger, quarry, convergent, reactive, tabular, entity, totem, conduit, tracer, smalltalk | | 2 | citadel, legate, oracle, parlance, arbor, blockfall, twenty48, minefield, solitaire, stencil | | 3 | loom, afferent, canopy, ask, lighthouse, enchiridion, docgen | | 4 | todo-app, homebase-app, chroma, vane, worldmap, grove, cairn, afferent-demos | ## Require Statement Format ```lean require <name> from git "https://github.com/nathanial/<repo>" @ "v0.0.X" ``` ## Finding Current Version ```bash cd <category>/<dependency> git describe --tags --abbrev=0 ``` Or check GitHub releases. ## Common Dependencies | Dependency | Use Case | Require Statement | |------------|----------|-------------------| | crucible | Testing | `require crucible from git "https://github.com/nathanial/crucible" @ "v0.0.1"` | | collimator | Optics/lenses | `require collimator from git "https://github.com/nathanial/collimator" @ "v0.0.1"` | | terminus | TUI apps | `require terminus from git "https://github.com/nathanial/terminus" @ "v0.0.1"` | | wisp | HTTP client | `require wisp from git "https://github.com/nathanial/wisp" @ "v0.0.1"` | | chronos | Time/dates | `require chronos from git "https://github.com/nathanial/chronos-lean" @ "v0.0.1"` | ## External Dependencies ```lean -- Mathlib (for collimator) require mathlib from git "https://github.com/leanprover-community/mathlib4" @ "v4.X.0" -- Batteries (for ledger) require batteries from git "https://github.com/leanprover-community/batteries" @ "v4.X.0" -- Plausible (for property testing) require plausible from git "https://github.com/leanprover-community/plausible" @ "v4.X.0" ``` ## After Adding ```bash lake update # Fetch new dependency lake build # Verify it builds lake test # Ensure tests still pass ``` ## Tier Violation Warning If adding a dependency from a higher tier, warn the user: > ⚠️ Warning: Adding `<dep>` (Tier X) to `<project>` (Tier Y) violates tier ordering. > This creates a circular dependency risk. Consider: > - Moving `<project>` to a higher tier > - Finding an alternative in a lower tier > - Extracting shared code to a new lower-tier project
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