Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/mathews-tom/armory/filesystemnpx skills add Mathews-Tom/armory --skill filesystemgit clone --depth 1 https://github.com/Mathews-Tom/armoryWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mathews-tom/armory/filesystem)<a href="https://agentmods.dev/skills/mathews-tom/armory/filesystem"><img src="https://agentmods.dev/badge/skills/mathews-tom/armory/filesystem.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00063 | $0.02254 |
| Opus 5 | $0.00032 | $0.01127 |
| Sonnet 5 | $0.00013 | $0.00451 |
| Haiku 4.5 | $0.00006 | $0.00225 |
Grade A, and why
filesystem scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 293 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Filesystem
All file and directory operations use Claude Code's built-in tools. No MCP server needed — native tools are faster, more capable, and cost zero context tokens when idle.
Quick Reference
| Filesystem MCP Tool | Replacement | Notes |
|---|---|---|
read_file(path) |
Read tool |
Supports line offset and limit |
read_multiple_files(paths) |
Multiple parallel Read calls |
Faster than sequential MCP calls |
write_file(path, content) |
Write tool |
Overwrites entire file |
edit_file(path, edits) |
Edit tool |
Exact string replacement; surgical edits |
list_directory(path) |
Glob or Bash ls |
Glob for patterns, ls for simple listing |
directory_tree(path) |
Bash fd or Glob **/* |
fd is fastest; Glob for pattern filtering |
search_files(pattern, path) |
Grep tool |
Full regex, file type filters, context lines |
create_directory(path) |
Bash mkdir -p |
-p creates intermediate directories |
move_file(src, dst) |
Bash mv |
Also handles renames |
get_file_info(path) |
Bash stat or Bash ls -la |
Size, permissions, timestamps |
list_allowed_directories |
N/A | Claude Code operates in the working directory; no sandbox restrictions |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 293 lines · 63 tokens per session scan A c8acb8bc31ae
filesystem is a skill published in the GitHub repository Mathews-Tom/armory (316 stars, last pushed 6d ago), licensed MIT. It adds 63 tokens to every session and 2,254 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
manager
Sync session work into GitHub issues, or query track status across repos. Write: find/update issue + W-label. Read: "что по ". Triggers: "создай issue", "синкни сессию", "manager". Not day/week plans (daily-tasks).
weekly-retro
Use when the user is closing an ISO week, reviewing planned outcomes against evidence, interviewing work Areas, resolving unfinished commitments, or asking for "ретро", "weekly retro", "week review", or lessons from the week.
art-director
Orchestrate iterative visual style searches with branch prompts, decision graphs, feedback loops, and final direction selection.
corp-doctor
Use when a Personal Corp operating loop needs setup, repair, a new department, or task routing: HQ files and agent rules, GitHub issue workflow, corp- owner map, department repositories, or deciding which repo an issue belongs to. Triggers: "corp doctor", "почини контур", "заведи отдел", "куда положить задачу"…
html-draft
Use when user wants a standalone HTML diagram in flat engineering blueprint style — architecture diagrams, system flows, technical spec sheets, component maps. Generates one HTML file using Tailwind v4 (browser CDN) for layout and D3 v7 (CDN) for SVG diagrams. User-invoked only — do NOT auto-trigger. Triggers on…
idea
Use when capturing ONE new idea the user voices and wants recorded — "save this idea", "I have an idea", "log this idea", "/idea", "idea: ...". Creates a provenance-tracked folder (one folder per idea) in your ideas repo, dedups against an index, optionally mirrors to a GitHub Project view filtered by label:idea. NOT…