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 skills add sd0xdev/sd0x-harness --skill claude-healthgit clone --depth 1 https://github.com/sd0xdev/sd0x-harnessWrote 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/sd0xdev/sd0x-harness/claude-health)<a href="https://agentmods.dev/skills/sd0xdev/sd0x-harness/claude-health"><img src="https://agentmods.dev/badge/skills/sd0xdev/sd0x-harness/claude-health/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/skills/sd0xdev/sd0x-harness/claude-health"><img src="https://agentmods.dev/badge/skills/sd0xdev/sd0x-harness/claude-health.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 6 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Agent Snooping · line 42 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 53 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 204 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 214 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- medium Agent Snooping · line 82 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 94 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00067 | $0.04384 |
| Opus 5 | $0.00034 | $0.02192 |
| Sonnet 5 | $0.00013 | $0.00877 |
| Haiku 4.5 | $0.00007 | $0.00438 |
Grade A, and why
claude-health scanned grade A with 2 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 10d 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.
Reads agent configuration directorieslowAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
| 1 | Junk files | `find .claude/ -name ".DS_Store" -o -name "*.zip" -o -name ".tmp*"` | Any exists → P1 | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Enumerates other installed skillslowAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
for dir in .claude/skills/*/; do Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 334 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Health Check
Trigger
- Keywords: health check, .claude check, config audit, lint .claude, claude health, plugin sync, version drift, upgrade check, doctor
When NOT to Use
- Code review (use
/codex-review-fast) - Doc review (use
/codex-review-doc) - Security review (use
/codex-security)
Scope
| Argument | Description |
|---|---|
--scope hygiene |
Only run C1-C7 hygiene checks |
--scope sync |
Only run S1-S3 sync checks |
--scope all |
Run both modules (default) |
Workflow
[--scope] → Select modules → Scan → Classify → Report → Fix suggestions
│ │
┌───────┴───────┐ P0/P1/P2
▼ ▼ + fix commands
Hygiene (C1-C7) Sync (S1-S3)
Hygiene Module — Checks (7 items)
| # | Check | Method | Criteria |
|---|---|---|---|
| 1 | Junk files | find .claude/ -name ".DS_Store" -o -name "*.zip" -o -name ".tmp*" |
Any exists → P1 |
| 2 | .gitignore exists | ls .claude/.gitignore |
Missing → P1 |
| 3 | .gitignore completeness | Read .claude/.gitignore, compare required items |
Missing required → P2 |
| 4 | Naming consistency | Scan all skills/*/ for reference vs references |
Inconsistent → P2 |
| 5 | README count sync | Count actual vs README description | Mismatch → P2 |
| 6 | Command-Skill pairing | Each core skill should have corresponding command | Missing → P1 |
| 7 | Cache size | du -sh .claude/cache/ |
> 50M → P2 |
Check 1: Junk Files
find .claude/ -name ".DS_Store" -o -name "*.zip" -o -name ".tmp*" 2>/dev/null
- Has results → P1: List files, suggest deletion
- No results → ✅
Check 2-3: .gitignore
ls .claude/.gitignore 2>/dev/null || echo "MISSING"
Missing → P1. If exists, read content and compare required items:
| Required Item | Reason |
|---|---|
.DS_Store |
macOS generates continuously |
settings.local.json |
Personal config |
cache/ |
Runtime cache |
.tmp* |
Temp files |
*.tmp |
Temp files (suffix variant) |
*.zip |
Backup archives |
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.
- 10d ago First seen · 334 lines · 67 tokens per session scan A fcf03f65c365
claude-health is a skill published in the GitHub repository sd0xdev/sd0x-harness (188 stars, last pushed 4d ago), licensed MIT. It adds 67 tokens to every session and 4,384 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 2 findings (reads agent configuration directories, enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
building
Implementation skill for writing production code with TDD. Covers the RED-GREEN-REFACTOR cycle, false-RED detection, vertical slicing, scope escalation, test process discipline, and code generation patterns. Loaded by component-builder and bug-investigator.
diff-driven-docs
Use when a BUILD phase completes, a commit is staged, or a PR is about to be created, and the diff has not yet been reflected in documentation. Also use when the user says "update docs", "sync docs", "document this", or asks whether documentation is up to date.
exploration
Two-mode exploration skill: (1) design dialogue — turn rough ideas into validated designs through collaborative interview before planning; (2) spike — throwaway code answering ONE design question, deleted or absorbed, never shipped. Router invokes mode via dispatch context.
memory-and-handoff
Two-mode skill: (1) session memory — load/persist durable workflow state under .cc10x/ (activeContext, patterns, progress) so context survives compaction; (2) handoff package — portable, secrets-redacted export for a coworker, different tool, or fresh non-cc10x session.
plan-review-gate
Use after saving a non-trivial plan or decision RFC when a fail-closed feasibility, completeness, and alignment review must block execution.
architecture
Greenfield architecture design: map functionality flows, draw components, design APIs, classify dependencies, plan observability. For multi-component, API, schema, auth, or integration-heavy work. For retrofitting existing code, use codebase-hygiene instead.