Borrowing it
Nothing to install: this file belongs to sungurerdim/dev-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/sungurerdim/dev-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/sungurerdim/dev-skillsWrote 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/instructions/sungurerdim/dev-skills/claude-md)<a href="https://agentmods.dev/instructions/sungurerdim/dev-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/sungurerdim/dev-skills/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/sungurerdim/dev-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/sungurerdim/dev-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.04980 | $0.04980 |
| Opus 5.5 | $0.01992 | $0.01992 |
| Sonnet 5.5 | $0.00996 | $0.00996 |
| Haiku 4.5 | $0.00498 | $0.00498 |
Grade A, and why
dev-skills CLAUDE.md 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 1mo 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 — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.
dev-skills
Multi-phase AI coding assistant skills covering the full software lifecycle — gates, error recovery, and systematic mitigation of 17 known AI failure modes (W1–W11 universal + W12–W17 domain-specific) across Claude Code, OpenCode, Cursor, Copilot, Windsurf, and Aider.
Mission: enable a solo developer + AI to ship production-ready, high-quality products in any software project — encoding each domain's complete best practices (security, performance, privacy, accessibility, UX/UI, testing, compliance, operations) as executable gates, so quality does not depend on the developer's knowledge, attention, or available time. Target: the highest-quality, most practical skill set in its class — every critical point covered, nothing that doesn't earn its keep.
Meta
- Status: active
- Owner: sungurerdim
- License: MIT
- Stack: Markdown only — zero runtime dependencies
- Skill count: 32
- Tool support: Claude Code, OpenCode, Cursor, Copilot, Windsurf/Devin Desktop (June 2026 rebrand — newer builds prefer
.devin/rules/), Aider (Agent Skills spec readers; OpenCode consumes~/.claude/skills/directly) - Releases: semver from v1.0.0 (2026-07-15); v2–v5 labels in docs/commits are spec-generation names, not release versions (see README § Versioning)
- Active program: cross-host (spec-gen v5) — see
docs/methodology/cross-host-program.md(2026-07-15 research: verified findings F1–F11, gaps G1–G6, program P0–P2, ds-rig)
Project Structure
| Path | Purpose |
|---|---|
ds-<name>/ |
One directory per skill (ds-init, ds-fix, ds-review, ds-deploy, etc.) |
SKILL-SPEC.md |
Authoritative skill format spec — every ds-* must conform |
agents/ |
Shared agent definitions (ds-research-agent — worker for ds-research + ds-brief); install to the host agent dir, e.g. ~/.claude/agents/ |
docs/ |
methodology/ (research + program records, authoring checklist) and guide.html (interactive production-readiness guide); the former lifecycle guides were migrated into the owning skills' rules files in 2.0.0 |
core/ |
Shared runtime references every skill links to as ../core/<file>.md — principles, severity/score, findings + profile format, signal inventory, ask-exception list, checkpoint protocol, execution loop, report templates, secret patterns, toolchains, CRAAP, plus the software-best-practices.md catalog and the experience-rules.md XR pointer map. Shipped on every install; no SKILL.md inside |
scripts/ |
The gate: quality.sh (entry point), check-consistency.sh (+ --self-test, --mutation-test), test-install.sh (installer round-trip) |
install.sh · install.cmd |
The installer (bash + coreutils + git, no rsync) and its Windows launcher; --check, --status, --update, --uninstall |
AGENTS.md |
Cross-host contributor instructions — the file Codex/Cursor/Copilot/Aider read; this file is the Claude-Code counterpart |
.github/ |
Issue + PR templates only — no workflows, the gate is local by design |
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.
- 1mo ago Changed · +10 lines · +983 tokens per session 071d70a78467
- 2mo ago First seen · 137 lines · 3,997 tokens per session scan A c03ff90ebc55
dev-skills CLAUDE.md is an instructions file published in the GitHub repository sungurerdim/dev-skills (1 stars, last pushed 1mo ago), licensed MIT. It adds 4,980 tokens to every session, about $0.0199 per session on Opus 5.5. 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 2026-08-31.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.