oakoss/agent-skills
Performs advanced CLI operations, structured data transformation, and Unix forensics with modern Rust-powered tools.
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SUMMARY.md
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Masters the command-line environment by turning raw text and unstructured data into actionable insights. Combines Rust-powered search tools (ripgrep, fd, bat), structured data shells (Nushell), JSON manipulation (jq/yq), and modern HTTP clients (xh) for high-performance CLI workflows.
Core philosophy: Replace legacy text-parsing pipelines (grep/awk/sed chains) with purpose-built tools that understand structure. ripgrep understands gitignore rules, fd understands file types, jq understands JSON, and Nushell understands tables.
When to use: Codebase-wide search and analysis, multi-file refactoring, JSON/YAML transformation pipelines, API debugging, directory navigation, log parsing, disk usage auditing, dependency tracing.
When NOT to use: GUI-based tasks, complex application logic (write a script instead), tasks requiring interactive prompts.
| Pattern | Tool / Command | Key Points | ||
|---|---|---|---|---|
| Text search | rg "pattern" -g "*.tsx" |
10-100x faster than grep, respects .gitignore |
||
| File search | fd -e pdf or fd "pattern" |
Fast alternative to find with smart defaults |
||
| Syntax-highlighted read | bat file.ts |
Cat with syntax highlighting and git integration | ||
| Directory jump | z project-name |
Remembers frequently visited directories | ||
| Fuzzy search | fzf or CTRL-T / CTRL-R |
Interactive selection for files and history | ||
| Tree view | eza --tree --level=2 |
Metadata-rich ls replacement with tree support | ||
| JSON query | `jq '.items[] \ | select(.active)'` | Full functional programming for JSON | |
| YAML query | yq '.config.database' file.yml |
jq-like syntax for YAML files | ||
| HTTP request | xh POST api.example.com/v1/data key=value |
Colorized, user-friendly HTTP client | ||
| Multi-file refactor | fd -e tsx -x sed -i 's/Old/New/g' {} |
Find files then execute transforms | ||
| Structured shell | `ls \ | where size > 1mb \ | sort-by size` | Nushell tables instead of text parsing |
| Log parsing | `rg "ERROR" --json \ | jq 'select(.type == "match") \ | .data.lines.text'` | Combine ripgrep JSON output with jq filters |
| File preview with search | fzf --preview 'bat --color=always {}' |
Browse files with syntax-highlighted preview | ||
| Find recently changed | fd --changed-within 1h |
Find files modified within a time window | ||
| Export count by file | `rg -c "pattern" -g "*.ts" \ | sort -t: -k2 -rn` | Count matches per file, sorted by frequency | |
| JSON format conversion | yq -o json config.yml |
Convert between YAML, JSON, CSV, and other formats | ||
| Advanced regex search | rg -P "(?<=function\s)\w+" --only-matching |
PCRE2 for lookahead/lookbehind patterns | ||
| Git-aware file listing | eza -la --git --icons |
Show file metadata with inline git status |
| Category | Modern Tool | Replaces | Key Advantage |
|---|---|---|---|
| Text search | ripgrep (rg) |
grep, ag, git grep | Speed, .gitignore awareness, Unicode |
| File search | fd | find | Smart defaults, regex, parallelism |
| File viewer | bat | cat, less | Syntax highlighting, git diff markers |
| Directory jump | zoxide (z) |
cd, autojump | Frecency-based ranking, fzf fallback |
| Fuzzy finder | fzf | manual piping | Universal selector for any list |
| File listing | eza | ls, tree | Tree view, git status, icons |
| JSON processing | jq | awk, python oneliners | Typed, functional JSON transforms |
| YAML processing | yq | sed on YAML | jq-compatible syntax for YAML |
| HTTP client | xh | curl, httpie | HTTPie syntax, Rust speed, single binary |
| Structured shell | Nushell | bash + awk/sed | Typed tables, native format conversion |
| Mistake | Correct Pattern |
|---|---|
Using grep instead of ripgrep for codebase search |
Use rg which is 10-100x faster and respects .gitignore by default |
Piping ls output into grep for file filtering |
Use fd for file discovery, or eza -D / eza --ignore-glob for listing |
Writing complex awk scripts for structured data |
Use Nushell or jq which natively understand JSON, CSV, and YAML |
Running rm -rf in scripts without a dry-run step |
Always add a verification or dry-run step before destructive operations |
| Using capturing groups in regex when not needed | Prefer non-capturing groups (?:...) for better performance in large-scale scans |
Searching node_modules or .git directories |
Use rg which skips these by default, or configure exclusions explicitly |
Forgetting select(.type == "match") on rg --json |
ripgrep JSON emits begin, match, context, end, and summary message types |
Using curl with verbose flag syntax |
Use xh which provides colorized output and HTTPie-compatible request-item syntax |
Parsing text output between tools with cut/tr |
Use Nushell pipelines that preserve structured data through every stage |
Anchoring regex with .* at the start |
Anchor with ^ when possible; unanchored .* causes expensive backtracking |
All tools are available via common package managers. Most are single statically linked binaries.
| Tool | macOS (Homebrew) | Linux (apt/cargo) |
|---|---|---|
| ripgrep | brew install ripgrep |
apt install ripgrep or cargo install ripgrep |
| fd | brew install fd |
apt install fd-find or cargo install fd-find |
| bat | brew install bat |
apt install bat or cargo install bat |
| zoxide | brew install zoxide |
cargo install zoxide |
| fzf | brew install fzf |
apt install fzf |
| eza | brew install eza |
cargo install eza |
| jq | brew install jq |
apt install jq |
| yq | brew install yq |
snap install yq or go install |
| xh | brew install xh |
cargo install xh |
| Nushell | brew install nushell |
cargo install nu |
Shell integration (add to shell config after installing):
| Tool | Shell Integration Required |
|---|---|
| zoxide | eval "$(zoxide init zsh)" (or bash/fish equivalent) |
| fzf | Source keybinding and completion scripts from fzf install |
Explore agent to run ripgrep queries, trace dependencies, and map code patternsTask agent to coordinate fd, sed, and verification steps across an entire projectPlan agent to design structured pipelines combining jq, Nushell, and API tools