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/catwillgh/mainframe/mainframe-secretsnpx skills add CATWILLgh/MAINFRAME --skill mainframe-secretsgit clone --depth 1 https://github.com/CATWILLgh/MAINFRAMEWhat 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 | $0.00060 | $0.00612 |
| Opus 5 | $0.00030 | $0.00306 |
| Sonnet 5 | $0.00012 | $0.00122 |
| Haiku 4.5 | $0.00006 | $0.00061 |
Grade A, and why
mainframe-secrets scanned grade A with 1 finding 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 2d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
tool such as `ssh`, `gh`, or `curl --netrc` may use its configured credential How it starts
The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Secrets handling
Use the installed credential mechanism without bringing secret values into model context.
Sources of truth
- Read the credentials index for service names, credential identifiers, access commands, and non-secret operational notes.
- Treat the index as the only readable credential catalog.
- Never read, search, print, summarize, or copy the protected store under
~/.config/credentials/. - Use the
secrethelper as the generic value-delivery interface. A native tool such asssh,gh, orcurl --netrcmay use its configured credential mechanism without exposing the backing file.
Consume a value
Follow the exact name and access pattern in the index. Pass the value directly to the process that needs it, for example:
secret run REGISTERED_NAME -- consumer-command
secret run removes other names from the managed store from the inherited
environment and exposes only the requested names to that one child process.
Prefer it whenever the consumer accepts credentials through environment
variables. If a consumer requires the value in a specific argument or header,
use the narrow inline form without printing it:
curl -H "x-api-key: $(secret get REGISTERED_NAME)" https://example.invalid/
Never run secret get as a standalone inspection command. Do not echo, log, serialize, retain, or place a value in a response, ticket, commit message, diagnostic trace, or URL. Prefer credential-aware files, environment delivery, or stdin when a process argument could expose the value.
An already-exported environment variable is usable only when the index names it for the resolved service. Do not assign a value to a shell variable that a later diagnostic could expose. Never weaken TLS, certificate, or SSH host-key verification merely to make authentication succeed.
If the index has no suitable entry, return the exact missing credential or catalog entry to the immediate caller. Do not invent a name, search other projects or memory for a value, relocate a credential, or create persistent credential state. Credential-store administration remains outside agent execution and needs separately supplied authority and protected input.
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.
- 2d ago First seen · 52 lines · 60 tokens per session scan A 774e9bd1e791
mainframe-secrets is a skill published in the GitHub repository CATWILLgh/MAINFRAME (2 stars, last pushed 11d ago), licensed MIT. It adds 60 tokens to every session and 612 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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