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Agent skill

Loogle Search

by parcadei in parcadei/Continuous-Claude-v3

Search Mathlib for lemmas by type signature pattern. An agent skill from parcadei/Continuous-Claude-v3.

MITAuto-check passed

Install Loogle Search

skills CLI
$ npx skills add parcadei/Continuous-Claude-v3 --skill loogle-search -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install parcadei/Continuous-Claude-v3 loogle-search --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/loogle-search .claude/skills/loogle-search && rm -rf skills-src

Use ~/.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/

Facts

Skill name
loogle-search
GitHub stars
3.9k
Used in
1 other repo
Token cost
~498 tokens
SKILL.md length
126 words
Files
1
Skills in repo
141
Repo updated
First seen
Licence
MIT

At a glance

Search Mathlib for lemmas by type signature pattern. An agent skill from parcadei/Continuous-Claude-v3.

  • Works in 3 steps: Identify what type shape you need → Query Loogle to find the lemma name → Apply the lemma in your proof
  • SKILL.md covers When to Use, Commands, Query Syntax and Examples, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Loogle Search is an agent skill from parcadei/Continuous-Claude-v3. Search Mathlib for lemmas by type signature pattern

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Context management for Claude Code. Hooks maintain state via ledgers and handoffs. MCP execution without context pollution. Agent orchestration with isolated context windows. The licence is MIT.

Example prompts

  • “/loogle-search”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Identify what type shape you need
  2. Query Loogle to find the lemma name
  3. Apply the lemma in your proof

What it can do on your machine

Read from SKILL.md and the folder at commit d07ff4b. 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 bash and lean).

    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

Loogle Search loads about 498 tokens when it runs. Until then it costs about 16 tokens; SKILL.md has 126 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~16
When it runs · the whole SKILL.md, loaded when a task matches
~498

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 parcadei/Continuous-Claude-v3 at commit d07ff4b, republished under its MIT licence (© parcadei). 126 words, ~498 tokens.

Download SKILL.mdSave it as .claude/skills/loogle-search/SKILL.md (or your agent's skills folder).
name
loogle-search
description
Search Mathlib for lemmas by type signature pattern

Search Mathlib for lemmas by type signature pattern.

When to Use

  • Finding a lemma when you know the type shape but not the name
  • Discovering what's available for a type (e.g., all Nontrivial ↔ _ lemmas)
  • Type-directed proof search

Commands

bash
# Search by pattern (uses server if running, else direct)
loogle-search "Nontrivial _ ↔ _"
loogle-search "(?a → ?b) → List ?a → List ?b"
loogle-search "IsCyclic, center"

# JSON output
loogle-search "List.map" --json

# Start server for fast queries (keeps index in memory)
loogle-server &

Query Syntax

PatternMeaning
_Any single type
?a, ?bType variables (same variable = same type)
Foo, BarMust mention both Foo and Bar
Foo.barExact name match

Examples

bash
# Find lemmas relating Nontrivial and cardinality
loogle-search "Nontrivial _ ↔ _ < Fintype.card _"

# Find map-like functions
loogle-search "(?a → ?b) → List ?a → List ?b"
# → List.map, List.pmap, ...

# Find everything about cyclic groups and center
loogle-search "IsCyclic, center"
# → commutative_of_cyclic_center_quotient, ...

# Find Fintype.card lemmas
loogle-search "Fintype.card"

Performance

  • With server running: ~100-200ms per query
  • Cold start (no server): ~10s per query (loads 343MB index)

Setup

Loogle must be built first:

bash
cd ~/tools/loogle && lake build
lake build LoogleMathlibCache  # or use --write-index

Integration with Proofs

When stuck in a Lean proof:

  1. Identify what type shape you need
  2. Query Loogle to find the lemma name
  3. Apply the lemma in your proof
lean
-- Goal: Nontrivial G from 1 < Fintype.card G
-- Query: loogle-search "Nontrivial _ ↔ 1 < Fintype.card _"
-- Found: Fintype.one_lt_card_iff_nontrivial
exact Fintype.one_lt_card_iff_nontrivial.mpr h

© parcadei, 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 .claude/skills/loogle-search of parcadei/Continuous-Claude-v3.

Open the folder on GitHubat commit d07ff4b

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in parcadei/Continuous-Claude-v3, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Loogle Search 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.

Loogle Search compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Loogle Search this skillparcadei/Continuous-Claude-v33.9k1 repos~498Automated safety check: PassMIT
Golang Patternsaffaan-m/ECC276k—~1.1kAutomated safety check: PassMIT
Kotlin Exposed Patternsaffaan-m/ECC276k4 repos~5.5kAutomated safety check: PassMIT
Dotnet Patternsaffaan-m/ECC276k1 repos~2.3kAutomated safety check: PassMIT
Fastapi Patternsaffaan-m/ECC276k—~2.3kAutomated safety check: PassMIT
Python Patternsaffaan-m/ECC276k—~2.3kAutomated safety check: PassMIT

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Questions about Loogle Search

What does Loogle Search do?

Search Mathlib for lemmas by type signature pattern. An agent skill from parcadei/Continuous-Claude-v3. Loogle Search is an agent skill from parcadei/Continuous-Claude-v3.

How do I install Loogle Search in Claude Code?

Run `npx skills add parcadei/Continuous-Claude-v3 --skill loogle-search -a claude-code`. Or copy the skill folder (.claude/skills/loogle-search in parcadei/Continuous-Claude-v3) into .claude/skills/loogle-search in your project. Claude Code loads it when a task matches its description.

How do I install Loogle Search in Codex?

Run `npx skills add parcadei/Continuous-Claude-v3 --skill loogle-search -a codex`. Or copy the skill folder (.claude/skills/loogle-search in parcadei/Continuous-Claude-v3) into .agents/skills/loogle-search in your project. Codex loads it when a task matches its description.

Can I use Loogle Search 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 parcadei/Continuous-Claude-v3 --skill loogle-search -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/loogle-search, .gemini/skills/loogle-search, .github/skills/loogle-search and .opencode/skills/loogle-search in your project.

What does Loogle Search need to run?

SKILL.md names no scripts, command-line tools or credentials: Loogle Search is instructions for the agent only.

Does Loogle Search 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 Loogle Search 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 Loogle Search use?

Loogle Search is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Loogle Search use?

About 498 tokens (SKILL.md is roughly 2k 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 Loogle Search?

Skills that share tags, products or a category with Loogle Search: Golang Patterns (affaan-m/ECC, 276k stars), Kotlin Exposed Patterns (affaan-m/ECC, 276k stars), Dotnet Patterns (affaan-m/ECC, 276k stars) and Fastapi Patterns (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Loogle Search?

parcadei (a GitHub user) maintains it in parcadei/Continuous-Claude-v3, which has 3,943 GitHub stars. The repository holds 141 skills in this directory. The repository was last updated on January 26, 2026.

Source: parcadei/Continuous-Claude-v3 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.