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/oauth-identity-provider/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/oauth-identity-provider)<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/oauth-identity-provider"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/oauth-identity-provider/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/oauth-identity-provider"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/oauth-identity-provider.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 | $0.00077 | $0.04949 |
| Opus 5.5 | $0.00031 | $0.01980 |
| Sonnet 5.5 | $0.00015 | $0.00990 |
| Haiku 4.5 | $0.00008 | $0.00495 |
Grade A, and why
oauth-identity-provider 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 — 384 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OAuth Identity Provider
Read external account attachments when changing local provisioning, connection UI, immutable external keys, or attachment binding in this consumer.
authorization-policy-oauth owns policy-selected login without a portal, its parser, callbacks, and opaque sessions. That peer consumer reuses this provider's authentication protocol and trust checks.
Use refresh-token-implementation to maintain opt-in portal renewal after verified upstream login. That consumer's snapshot mode captures claims before transformations and never renews upstream tokens. Keep callback state/nonce/PKCE and signature verification in this owner; selected snapshot providers must disable upstream identity-token cookies.
The portal's external-provider Successful login INFO event records provider
acceptance with request/session correlation, auth_method and auth_realm.
It omits the arbitrary identity payload because complete UserInfo enrichment can
contain nested credentials before snapshot sanitation. Do not move this event
to final issuance or treat it as proof of delivered credentials. Preserve the
separate explicit Debug diagnostics and the
authentication event contract.
Ownership and Entry Points
pkg/idp/config.go validates the shared provider parameter allowlist;
pkg/idp/provider.go constructs the concrete provider. OAuth behavior lives
under pkg/idp/oauth. Exercise this dispatcher as well as concrete helpers:
an OAuth Config field is not usable through the shared API until dispatch
accepts it and checks its type.
pkg/idp/oauth/parser.NewOAuthIdentityProviderConfigFromDirectives returns
*oauth.Config. pkg/idp/parser.NewOAuthIdentityProviderConfigFromDirectives
reuses that parser and returns *idp.IdentityProviderConfig for the shared
dispatcher or root Config.AddIdentityProvider. Both take the provider name
and encoded body statements. Keep grammar in the OAuth parser; the shared
adapter owns only normalized configuration conversion and allowlist validation.
See directive parsing for the complete
grammar, application examples, parser maintenance, defaults, and validation
boundaries.
What ships with it
3 files 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 · +8 lines 7de5f9b6f4d4
- 17d ago Changed · +13 lines · +5 tokens per session 21a61154ff3d
- 26d ago Changed · +23 lines 17dc4b4d2d90
- 28d ago Changed · +1 lines b709cc55f190
- 1mo ago Changed · +47 lines · +5 tokens per session c9e409f89ce8
- 1mo ago Changed · +38 lines b18364c52982
- 1mo ago Changed · +31 lines · +7 tokens per session 36e32f1c2e40
- 1mo ago Changed · +20 lines 1016604419c9
- 1mo ago Changed · +32 lines · +6 tokens per session 8cdd66b5ab2c
- 1mo ago First seen · 171 lines · 54 tokens per session scan A 2be2adef80af
oauth-identity-provider is a skill published in the GitHub repository greenpau/go-authcrunch (60 stars, last pushed 10d ago), licensed Apache-2.0. It adds 77 tokens to every session and 4,949 once invoked, about $0.0003 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 2026-09-13.
oauth-identity-provider compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| oauth-identity-providergreenpau/go-authcrunch | Skill | 60 | 10d ago | Apache-2.0 | A | 77 | Codex |
| mem0-oss-to-platformmem0ai/mem0 | Skill | 68k | 2d ago | Apache-2.0 | A | 217 | Claude Code, Codex |
| azure-mgmt-botservice-dotnetmicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 78 | Claude Code |
| fastapi-router-pymicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 46 | Claude Code |
| dev-runtimelangwatch/langwatch | Skill | 5.0k | yesterday | Apache-2.0 | A | 172 | Claude Code |
| api-designericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 105 | Claude Code, Codex |
| migrate-segw-to-raparc-mcp/arc-1 | Skill | 252 | yesterday | MIT | A | 106 | Claude Code |