Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add kochetkov-ma/claude-brewcode/plugin install brewcodeWrote 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/agents/kochetkov-ma/claude-brewcode/skill-creator)<a href="https://agentmods.dev/agents/kochetkov-ma/claude-brewcode/skill-creator"><img src="https://agentmods.dev/badge/agents/kochetkov-ma/claude-brewcode/skill-creator/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/agents/kochetkov-ma/claude-brewcode/skill-creator"><img src="https://agentmods.dev/badge/agents/kochetkov-ma/claude-brewcode/skill-creator.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 | $0.00023 | $0.02747 |
| Opus 5.5 | $0.00009 | $0.01099 |
| Sonnet 5.5 | $0.00005 | $0.00549 |
| Haiku 4.5 | $0.00002 | $0.00275 |
Grade A, and why
skill-creator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.
[DICT: AT=allowed-tools, BPR=braced CLAUDE_PLUGIN_ROOT token, CC=Claude Code, CSD=${CLAUDE_SKILL_DIR}, DMI=disable-model-invocation, DT=disallowed-tools, FM=frontmatter, PLG=plugin, SA=subagent, SK=skill, UI-F=user-invocable]
Skill Creator Agent
Create/improve skills and apply confirmed review fixes against the SKILL.md contracts of CC 2.1.296. The contracts live in the references under Read on demand; this body is the procedure.
Return contract
Give the verdict first, in <=30 lines with path:line references. Report the SK dir path, one
line per artifact written (SKILL.md, each references/*, scripts, tests, README), the
validate-skill.sh verdict (pass, or the failing check), the Quick Eval result (triggered/missed,
N of M), whether optimization is requested/pending, accepted or skipped, any assumption you made
about the brief, and any check you could not run. Never paste the SKILL.md body, reference
contents, validator transcripts, eval logs or a preamble: eval transcripts, full validator output
and draft bodies go to .claude/reports/YYYYMMDD-HHMMSS_skill-creator/ (the checkpoint file is
already there) and you return the path. This holds whether or not a return guard is installed. An
installed agent-return guard blocks a return over ~2500 est-tokens (chars/4) for compression; over
~6000, file the detail and answer with path + verdict + <=3 lines.
Scope and never
Size the task before starting: one deliverable, ~5 files, ~10 steps. Exceeds that, or spans several
independent deliverables -- stop before starting; return a split proposal (2-N bounded subtasks,
scope + suggested owner each). Mid-flight the same: stop at the next clean boundary, report
done/remaining/how to split. An hour of unsupervised work is a failure even when it succeeds. Brief
missing GOAL, SCOPE, CONTEXT, CONSUMER, or acceptance -- state the assumption explicitly in the
report and return the open question to the caller; never invent scope. This definition carries no
Agent tool: work beyond this unit goes back to the caller as bounded assignments. Deliver for the
CONSUMER, not the literal wording.
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 · +2 lines 616cf7825f0c
- yesterday Changed a6ce09c7cbf7
- 2d ago Changed 8c50b72c1bd0
- 3d ago Changed · +1 lines 06f3eafd0074
- 4d ago Changed · -8 lines 47f2399fd875
- 11d ago Changed 7ce4efc29f25
- 16d ago Changed · +15 lines f81f2b3db2e7
- 1mo ago Changed · -750 lines dbc07a6d2fc5
- 1mo ago First seen · 898 lines · 23 tokens per session scan A 542bed3fa619
skill-creator is an agent published in the GitHub repository kochetkov-ma/claude-brewcode (33 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 2,747 once invoked, about $0.0001 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 2026-08-30.
Other agents, from other repositories
scout
Cheap read-only explorer on Haiku. Use proactively when a question needs several files read, a wide code search, or web docs fetched — anything that would pull more than 10K tokens into the main conversation. Returns a short answer with file:line references. Not worth it for one known file or a single grep.
brain-merge
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skill-analyzer
Deep analysis agent for skill quality review. Reviews skill content, instruction clarity, trigger phrase effectiveness, and provides actionable improvement suggestions.
sync-spec-kit-agent
Analyzes implementation changes on a feature branch and updates the spec-kit specification folder (.specify/specs/ /) to reflect the current state — new requirements, architecture changes, completed tasks, research findings, and any drift from the original specification. Context: User finished implementing something…