Borrowing it
Nothing to install: this file belongs to greenpau/go-authcrunch. 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/greenpau/go-authcrunch/main/.codex/skills/credential-authenticators/SKILL.mdgit clone --depth 1 https://github.com/greenpau/go-authcrunchWrote 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/greenpau/go-authcrunch/credential-authenticators)<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/credential-authenticators"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/credential-authenticators/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/greenpau/go-authcrunch/credential-authenticators"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/credential-authenticators.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 | $0.00040 | $0.01205 |
| Opus 5.5 | $0.00016 | $0.00482 |
| Sonnet 5.5 | $0.00008 | $0.00241 |
| Haiku 4.5 | $0.00004 | $0.00120 |
Grade A, and why
credential-authenticators 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 12d 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 — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Credential Authenticators
pkg/authproxy.Authenticator is the legacy Basic/API-key boundary. Configure the
policy's realm/method/portal bindings, attach instances with
Gatekeeper.AddAuthenticators, then require HasAuthProxies() success before
serving. Attachment is construction-time only; hosts drain users and close their
own backend handles. No root factory or automatic plugin loader is installed.
Use ContextAuthenticator to receive the protected request context in
BasicAuthContext/APIKeyAuthContext. The validator falls back to legacy methods
when absent, and checks cancellation before and after either call. This cannot
interrupt work inside a legacy method. Configured backend timeouts still apply.
FreshAuthenticator.RequireFreshAuthentication() is a stable lifetime
capability. True bypasses credential cache reads and writes, including the
validator's second payload lookup and explicit CacheUser calls. The runtime
sets server-only cache flags; claims cannot enable or disable this policy.
Ordinary cacheable authenticators preserve their existing behavior. Cache keys
separate payload class, Basic/API-key method, source address, realm, and a SHA-256
secret digest with unambiguous field boundaries. Do not cache reusable plaintext.
Authentication portals always implement this fresh capability. A gatekeeper delegating Basic or API-key authentication to a portal must call the backend on every credential request, including after a successful request with identical credentials. Current account status, credential validity, roles and effective authentication policy remain authoritative; attached directory identities also recheck their local identity policy. Account disablement, password reset, API-key deletion or a stronger factor requirement must not reuse a previous credential result. Budget for the password verification or directory request on each call. This does not change the lifetime or caching of separately presented bearer JWTs, or opt legacy remote/third-party authenticators into fresh checks.
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.
- 12d ago Changed · +18 lines 215d4cb43021
- 29d ago First seen · 79 lines · 40 tokens per session scan A 961994adbb94
credential-authenticators is a skill published in the GitHub repository greenpau/go-authcrunch (60 stars, last pushed 10d ago), licensed Apache-2.0. It adds 40 tokens to every session and 1,205 once invoked, about $0.0002 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 2026-10-08.
credential-authenticators compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| credential-authenticatorsgreenpau/go-authcrunch | Skill | 60 | 10d ago | Apache-2.0 | A | 40 | Codex |
| create-prprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 48 | Claude Code, Codex |
| schema-explorationlangchain-ai/deepagents | Skill | 31k | yesterday | MIT | A | 57 | Claude Code, Codex |
| atlas-mssqlariga/atlas | Skill | 8.8k | yesterday | Apache-2.0 | A | 163 | Claude Code |
| ha-data-storesshiwenwen/hope-agent | Skill | 1.9k | yesterday | MIT | A | 115 | Claude Code, Codex |
| nornicdb-cypher-queriesorneryd/NornicDB | Skill | 923 | yesterday | MIT | A | 79 | Claude Code, Codex |
| volcengine-rds-postgresqlbytedance/agentkit-samples | Skill | 484 | today | Apache-2.0 | A | 63 | Claude Code, Codex |