Borrowing it
Nothing to install: this file belongs to zkysar1/Claude-Mind. 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/zkysar1/Claude-Mind/main/.claude/skills/forge-skill/SKILL.mdgit clone --depth 1 https://github.com/zkysar1/Claude-MindWrote 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/zkysar1/claude-mind/forge-skill)<a href="https://agentmods.dev/skills/zkysar1/claude-mind/forge-skill"><img src="https://agentmods.dev/badge/skills/zkysar1/claude-mind/forge-skill/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/zkysar1/claude-mind/forge-skill"><img src="https://agentmods.dev/badge/skills/zkysar1/claude-mind/forge-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 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 254 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 Rogue Agent · line 422 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- medium Agent Snooping · line 48 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 49 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 Prompt Injection · line 551 Subtle instructions detected that may alter agent decision-making or introduce hidden biases.Fix: Review content for implicit steering or bias. Ensure instructions are explicit and align with the skill's stated purpose.
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 | $0.00185 | $0.11694 |
| Opus 5 | $0.00093 | $0.05847 |
| Sonnet 5 | $0.00037 | $0.02339 |
| Haiku 4.5 | $0.00018 | $0.01169 |
Grade A, and why
forge-skill 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 today.
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 — 786 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/forge-skill — Skill Forge
Meta-skill that creates new skills from recurring capability gaps tracked in
meta/skill-gaps.yaml. Forged skill SKILL.md files go in .claude/skills/ for
Claude Code discovery. Metadata is tracked in world/forged-skills.yaml (not _tree.yaml).
How Claude Code discovers skills (read first)
At Claude Code startup, the harness scans .claude/skills/*/SKILL.md and loads
each skill's name + description fields from the YAML front matter into the
system prompt. That list is ALL Claude knows about the skill until it is invoked.
Everything else — the body, the companion scripts, the conventions — is loaded
only when the skill is actually used. So the description is the ONLY signal
Claude uses to decide whether to fire a skill in response to a task.
A poorly worded description means the skill silently undertriggers and the capability gap it was forged to fill re-opens. This is the single highest-leverage field in the whole file — treat it that way.
Prior art — Anthropic's skill-creator
Anthropic publishes a generic skill-authoring skill at
anthropics/skills/skills/skill-creator/SKILL.md
(https://github.com/anthropics/skills/blob/main/skills/skill-creator/SKILL.md)
and a normative best-practices doc at
https://platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices.
Use those as the default reference for generic skill-authoring mechanics
(frontmatter schema, progressive-disclosure patterns, script packaging,
evaluations). /forge-skill layers THIS agent's domain on top:
- Gap detection via
meta/skill-gaps.yaml(encounter counts, value estimates) - Curriculum and developmental gates (CALIBRATE+ / EXPLOIT+ thresholds)
- Companion-script generation for restricted operations (SSH, API scopes)
- Registration in
world/forged-skills.yaml+ git-commit of the skill body (fleet distribution) - Message-board announcement and aspirations-loop validation goal
If you're not sure how to write the body of a skill, read skill-creator first, then come back here for the integration requirements.
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.
- today Changed · +85 lines · +39 tokens per session 12a2b7d6478c
- 8d ago First seen · 701 lines · 146 tokens per session scan A 84a596142054
forge-skill is a skill published in the GitHub repository zkysar1/Claude-Mind (5 stars, last pushed today), licensed MIT. It adds 185 tokens to every session and 11,694 once invoked, about $0.0009 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 2026-08-31.
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