What is identity-public-keys?

A set of backend instructions for handling users' GPG and SSH public keys. These are keys used to identify or encrypt for a person; they are different from private keys and from JWT signing keys.

Use it to add GPG or SSH public keys, register them through a profile API, persist identity data, and maintain compatibility with supported OpenPGP formats.

It provides consistent parsing, duplicate checks, database storage, and authenticated profile-API handling while keeping one user's key list separate from another's. It also specifies a maintained OpenPGP library for compatibility.

How greenpau/go-authcrunch configures Codex

Reuse

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.

Copy the file

curl -O https://raw.githubusercontent.com/greenpau/go-authcrunch/main/.codex/skills/identity-public-keys/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/greenpau/go-authcrunch

Made for: Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/greenpau/go-authcrunch/identity-public-keys/github.svg)](https://agentmods.dev/skills/greenpau/go-authcrunch/identity-public-keys)

Your own site

<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/identity-public-keys"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/identity-public-keys/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/identity-public-keys"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/identity-public-keys.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 985 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00046	$0.00985
Opus 5.5	$0.00018	$0.00394
Sonnet 5.5	$0.00009	$0.00197
Haiku 4.5	$0.00005	$0.00098

Measured 12d ago against content hash d672722656da, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

identity-public-keys 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.

.codex/skills/identity-public-keys/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Identity Public Keys

Ownership and Input Boundary

pkg/identity/public_key.go owns NewPublicKey and format parsing. User.AddPublicKey rejects duplicate keys; Database.AddPublicKey checks the username/email identity pair under its lock and commits the identity data. pkg/ids/local/store.go and authenticator.go dispatch AddKeyGPG/AddKeySSH. These user-owned public keys are distinct from JWT signing keys in pkg/kms.

The portal profile API calls AddUserGPGKey in pkg/authn/api_add_user_gpg_key.go. handle_api_profile.go requires a valid authenticated session, an allowed user/admin role, and a local identity store before dispatching a parsed operation. Its request body limit is one MiB. The backend identity comes from the authenticated session; request fields must not choose another user's inventory. Direct Go callers of the identity database own authorization and input-size limits; the database itself is not an HTTP authorization boundary.

OpenPGP Compatibility

Use the maintained github.com/ProtonMail/go-crypto/openpgp package pinned by go.mod; do not reintroduce golang.org/x/crypto/openpgp. The latter import is covered by GO-2026-5932, which lists no fixed version of that unmaintained package. Other x/crypto packages remain dependencies. Review the current advisory and maintained package guidance for future changes. Check the replacement's transitive dependencies too: inspect the selected ProtonMail and CIRCL entries in go.mod and the effective module graph, and retain a CIRCL selection with the fix for GO-2026-4550. A maintained direct dependency alone does not establish that its selected dependency graph is current.

The repository uses ReadArmoredKeyRing to inspect public-key metadata. It does not call OpenPGP message decryption, encryption, signing, or detached signature verification. A broad advisory or interface-based scan trace does not establish an authentication bypass or an exploitable cryptographic operation. An authenticated user can supply parsing input through the profile API, and library callers may supply it directly; retain strict errors and bounded HTTP input. Package maintenance is necessary without claiming an exploit.

Read the full file on GitHub · 83 lines

Files

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.

agents/openai.yaml 332 B

Changes

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 · +1 lines d672722656da
1mo ago First seen · 82 lines · 46 tokens per session scan A b1e9ca5b8795

Subscribe to this mod's changes

identity-public-keys is a skill published in the GitHub repository greenpau/go-authcrunch (60 stars, last pushed 10d ago), licensed Apache-2.0. It adds 46 tokens to every session and 985 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 2026-09-15.

Backend and APIs Security

identity-public-keys next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
identity-public-keysgreenpau/go-authcrunch	Skill	60	10d ago	Apache-2.0	A	46	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

go-authcrunch: Skill for Codex